audit2: cli + modelregistry + dead-code cleanup (2 med, rest low)

cli: --reasoning-effort notice evaluates the EFFECTIVE model (works without --model) (MED); unsafe warning fires for --auto high too (MED); --auto value validated even with --skip-permissions-unsafe (LOW); DefaultRegistry built once per exec, not 3x (LOW); --profile kept as intentional legacy-compat accept-and-ignore (contested finding resolved, doc-commented). modelregistry: removed dead FallbackFor. tools: removed dead TaskNonInteractiveMessage + dead OnSandboxDecision hook (no setter anywhere); fixed the now-stale loop.go comment. TDD where behavioral; build/vet/full-suite green.

Refs #102

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

.coderabbit.yaml

@@ -29,9 +29,6 @@ reviews:
     - path: "tests/**/*.ts"
       instructions: |
         Review tests for Bun test idioms, deterministic behavior, and meaningful coverage of safety decisions, provider/runtime flows, session events, and TUI command behavior.
-    - path: "**/*.go"
-      instructions: |
-        Do not request Plan 9 or other unsupported GOOS/GOARCH shims. The five native prebuilt release targets are linux-x64, linux-arm64, macos-arm64, macos-x64, and windows-x64. Android/Termux is also a supported runtime through the documented android-arm64 source build and Linux artifact fallback. Other GOOS/GOARCH combinations are not a review criterion.
   tools:
     github-checks:
       timeout_ms: 300000

.gitattributes

@@ -1,3 +0,0 @@
-*.go text eol=lf
-*.mod text eol=lf
-*.sum text eol=lf

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,54 +0,0 @@
-name: Bug report
-description: Report a reproducible problem in Zero
-labels: ["bug"]
-body:
-  - type: markdown
-    attributes:
-      value: |
-        Thanks for filing a bug. Clear, reproducible reports are the most useful way to help the
-        project. Please do **not** report security vulnerabilities here — see SECURITY.md.
-  - type: input
-    id: version
-    attributes:
-      label: Version / branch / commit
-      description: Output of `zero version`, or the branch/commit you built from.
-      placeholder: "zero dev (commit abc1234) / main"
-    validations:
-      required: true
-  - type: input
-    id: env
-    attributes:
-      label: OS and environment
-      description: Operating system, terminal, and any relevant environment details.
-      placeholder: "macOS 14 / iTerm2 / Go 1.25.1"
-    validations:
-      required: true
-  - type: textarea
-    id: repro
-    attributes:
-      label: Steps to reproduce
-      description: A minimal reproduction case when possible.
-      placeholder: |
-        1. Run `zero ...`
-        2. ...
-    validations:
-      required: true
-  - type: textarea
-    id: expected
-    attributes:
-      label: Expected behavior
-    validations:
-      required: true
-  - type: textarea
-    id: actual
-    attributes:
-      label: Actual behavior
-    validations:
-      required: true
-  - type: textarea
-    id: logs
-    attributes:
-      label: Relevant logs, screenshots, or error messages
-      description: Redact any secrets (API keys, tokens) before pasting.
-    validations:
-      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -1,11 +0,0 @@
-blank_issues_enabled: false
-contact_links:
-  - name: Questions and setup help
-    url: https://github.com/Twigpine/zero/discussions/categories/q-a
-    about: Ask in Discussions Q&A. Include zero --version, your OS, provider/model, and zero doctor output for setup problems.
-  - name: Feature ideas
-    url: https://github.com/Twigpine/zero/discussions/categories/ideas
-    about: Propose and discuss ideas in Discussions before opening a PR (Zero is in controlled development, see CONTRIBUTING.md).
-  - name: Security vulnerability
-    url: https://github.com/Twigpine/zero/security/advisories/new
-    about: Report security issues privately via GitHub Security Advisories (see SECURITY.md). Do not file a public issue.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,51 +0,0 @@
-name: Feature request (previously discussed)
-description: File only after your idea gained traction in Discussions Ideas or a maintainer asked for a tracking issue
-labels: ["enhancement"]
-body:
-  - type: markdown
-    attributes:
-      value: |
-        New feature ideas start in [Discussions Ideas](https://github.com/Twigpine/zero/discussions/categories/ideas),
-        not here. This form is for the step after that: an idea that gained traction in Discussions,
-        or one a maintainer asked to have tracked as an issue. Please link the discussion below.
-        Do not begin implementation until the issue has been reviewed and marked with the
-        `issue-approved` label (see CONTRIBUTING.md).
-  - type: input
-    id: discussion
-    attributes:
-      label: Ideas discussion
-      description: Link to the Discussions Ideas thread (or note which maintainer asked for this issue).
-    validations:
-      required: true
-  - type: textarea
-    id: problem
-    attributes:
-      label: Problem
-      description: The problem you are trying to solve.
-    validations:
-      required: true
-  - type: textarea
-    id: proposal
-    attributes:
-      label: Requested behavior
-      description: The behavior or functionality you are requesting.
-    validations:
-      required: true
-  - type: textarea
-    id: why
-    attributes:
-      label: Why it belongs in Zero
-    validations:
-      required: true
-  - type: textarea
-    id: alternatives
-    attributes:
-      label: Alternatives or workarounds considered
-    validations:
-      required: false
-  - type: textarea
-    id: context
-    attributes:
-      label: Examples, screenshots, or prior discussion
-    validations:
-      required: false

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,16 +0,0 @@
-## Summary
-
-<!-- What does this change do, and why? -->
-
-## Linked issue
-
-<!-- Per CONTRIBUTING.md, PRs need an approved parent issue with the `issue-approved` label. -->
-Fixes #
-
-## Checklist
-
-- [ ] The linked issue already has the `issue-approved` label.
-- [ ] `go build ./...`, `go vet ./...`, and `go test ./...` pass locally.
-- [ ] `gofmt` clean.
-- [ ] Tests added/updated for the change (and run under `-race` where relevant).
-- [ ] UI changes include screenshots or a short recording where possible.

.github/workflows/ci.yml

@@ -6,109 +6,10 @@ on:
     branches:
       - main
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
-
-permissions:
-  contents: read
-
 jobs:
-  quality:
-    name: Code Quality & Lint
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    permissions:
-      contents: read
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.2.2
-        with:
-          persist-credentials: false
-
-      - name: Setup Go
-        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.3.0
-        with:
-          go-version-file: go.mod
-          cache: true
-
-      - name: Check formatting
-        run: make fmt-check
-
-      - name: Vet
-        run: go vet ./...
-
-      - name: deadcode (advisory)
-        continue-on-error: true
-        run: make deadcode
-
-      - name: golangci-lint (advisory)
-        continue-on-error: true
-        run: make lint-static
-
-  test:
-    name: Unit Tests & Coverage
-    runs-on: ubuntu-latest
-    timeout-minutes: 15
-    permissions:
-      contents: read
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.2.2
-        with:
-          persist-credentials: false
-
-      - name: Setup Go
-        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.3.0
-        with:
-          go-version-file: go.mod
-          cache: true
-
-      - name: Test with coverage
-        run: |
-          go test -count=1 -coverprofile=coverage.out -covermode=atomic ./...
-
-      - name: Publish coverage summary
-        if: always()
-        shell: bash
-        run: |
-          if [ -f coverage.out ]; then
-            go tool cover -func=coverage.out | awk '
-            BEGIN {
-              total = "unknown"
-              rows = ""
-            }
-            $1 == "total:" {
-              total = $3
-              next
-            }
-            {
-              rows = rows sprintf("| `%s` | `%s` | **%s** |\n", $1, $2, $3)
-            }
-            END {
-              print "### 📊 Test Coverage Summary: **" total "**"
-              print "<details><summary>Coverage per function</summary>\n"
-              print "| File | Function | Coverage |"
-              print "| :--- | :--- | :--- |"
-              printf "%s", rows
-              print "</details>"
-            }' >> "$GITHUB_STEP_SUMMARY"
-          fi
-
-      - name: Upload coverage artifact
-        if: always()
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
-        with:
-          name: zero-coverage-report
-          path: coverage.out
-          if-no-files-found: warn
-
   smoke:
     name: Smoke (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
-    timeout-minutes: 15
     strategy:
       fail-fast: false
       matrix:
@@ -117,22 +18,17 @@ jobs:
           - macos-latest
           - windows-latest
 
-    permissions:
-      contents: read
-
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.2.2
-        with:
-          persist-credentials: false
+        uses: actions/checkout@v4
 
       - name: Setup Go
-        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.3.0
+        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff
         with:
           go-version-file: go.mod
           cache: true
 
-      - name: Test (Fast Non-Race)
+      - name: Test
         run: go test ./...
 
       - name: Build binary
@@ -141,51 +37,16 @@ jobs:
       - name: Smoke binary
         run: go run ./cmd/zero-release smoke
 
-  race:
-    name: Race Detector
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-    # A race the detector newly reports can present as a deadlock rather than a
-    # failure, and the default job timeout is six hours. This job is expected to
-    # be the longest in the workflow, so the ceiling is generous but finite.
-    timeout-minutes: 30
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-        with:
-          persist-credentials: false
-
-      - name: Setup Go
-        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff
-        with:
-          go-version-file: go.mod
-          cache: true
-
-      # Invoke the Makefile target rather than repeating its flags. `make test`
-      # is already `go test ./... -race -count=1`, so running it here is what
-      # stops the project's declared test command and what CI actually runs
-      # from drifting apart again. The race detector needs cgo, which the
-      # hosted ubuntu runner supplies without an extra setup step.
-      - name: Test with the race detector
-        run: make test
-
   performance:
     name: Performance Smoke
     runs-on: ubuntu-latest
-    timeout-minutes: 10
-    permissions:
-      contents: read
 
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.2.2
-        with:
-          persist-credentials: false
+        uses: actions/checkout@v4
 
       - name: Setup Go
-        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.3.0
+        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff
         with:
           go-version-file: go.mod
           cache: true
@@ -194,39 +55,12 @@ jobs:
         run: go run ./cmd/zero-release build
 
       - name: Performance smoke
-        run: |
-          mkdir -p dist/perf
-          go run ./cmd/zero-perf-bench --output dist/perf/perf-bench.json --ci
+        run: go run ./cmd/zero-perf-bench --output dist/perf/perf-bench.json --ci
 
       - name: Upload performance report
         if: always()
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        uses: actions/upload-artifact@v4
         with:
           name: zero-performance-smoke
           path: dist/perf/perf-bench.json
           if-no-files-found: warn
-
-  security:
-    name: Security & Code Health
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    permissions:
-      contents: read
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.2.2
-        with:
-          persist-credentials: false
-
-      - name: Setup Go
-        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.3.0
-        with:
-          go-version-file: go.mod
-          cache: true
-
-      - name: govulncheck (linux)
-        run: make vulncheck
-
-      - name: govulncheck (windows)
-        run: make vulncheck-windows

.github/workflows/pr-auto-review.yml

@@ -21,10 +21,9 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          persist-credentials: false
 
       - name: Setup Go
         uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff
@@ -81,7 +80,7 @@ jobs:
 
       - name: Post review summary
         if: always()
-        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
+        uses: actions/github-script@v7
         env:
           ZERO_REVIEW_BODY_PATH: ${{ steps.review-summary.outputs.path }}
         with:

.github/workflows/release-artifacts.yml

@@ -15,34 +15,24 @@ jobs:
   package:
     name: Package (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
-    permissions:
-      contents: write # create/upload the GitHub Release on a tag push
     strategy:
       fail-fast: false
       matrix:
-        # `zero-release package` builds + smoke-tests natively (host==target), so each
-        # target platform needs its own native runner. These five cover the platforms
-        # install.sh / install.ps1 / the npm wrapper resolve.
         os:
-          - ubuntu-latest      # linux-x64
-          - ubuntu-24.04-arm   # linux-arm64
-          - macos-latest       # macos-arm64 (Apple Silicon)
-          - macos-15-intel     # macos-x64 (Intel)
-          - windows-latest     # windows-x64
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
 
     steps:
       - name: Checkout
         if: ${{ github.event_name != 'workflow_dispatch' || inputs.ref == '' }}
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-        with:
-          persist-credentials: false
+        uses: actions/checkout@v4
 
       - name: Checkout requested ref
         if: ${{ github.event_name == 'workflow_dispatch' && inputs.ref != '' }}
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@v4
         with:
           ref: ${{ inputs.ref }}
-          persist-credentials: false
 
       - name: Setup Go
         uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff
@@ -53,23 +43,6 @@ jobs:
       - name: Test
         run: go test ./...
 
-      # zero-release names assets zero-v<package.json version>-… while the release
-      # is published under the pushed git tag. If they disagree, install.sh/install.ps1
-      # and the npm postinstall all build a download URL that 404s. Fail fast so a
-      # forgotten version bump can never publish mis-versioned, un-installable assets.
-      # Matches on the ref (not event_name) because release-please dispatches this
-      # workflow at the tag ref — its GITHUB_TOKEN-created tag cannot fire `push`.
-      - name: Check tag matches package.json version
-        if: ${{ startsWith(github.ref, 'refs/tags/v') }}
-        shell: bash
-        run: |
-          pkg_version="$(node -p "require('./package.json').version")"
-          if [ "v$pkg_version" != "$GITHUB_REF_NAME" ]; then
-            echo "::error::tag $GITHUB_REF_NAME does not match package.json version v$pkg_version — bump package.json before tagging so the release assets and the npm package agree." >&2
-            exit 1
-          fi
-          echo "tag $GITHUB_REF_NAME matches package.json version v$pkg_version."
-
       - name: Package release artifact
         run: go run ./cmd/zero-release package
 
@@ -77,184 +50,8 @@ jobs:
         run: go run ./cmd/zero-release verify
 
       - name: Upload package
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+        uses: actions/upload-artifact@v4
         with:
           name: zero-${{ runner.os }}-${{ runner.arch }}
           path: dist/release/*
           if-no-files-found: error
-
-      # On a `v*` tag ref (pushed manually, or dispatched at the tag by the
-      # release-please workflow), publish the packaged archive + .sha256 as GitHub
-      # Release assets so the documented `scripts/install.sh` / `install.ps1` path
-      # (which reads /releases/latest) works. Uses the preinstalled `gh` (no new
-      # action dependency); each matrix OS creates the release if absent
-      # (best-effort — release-please normally creates it first) then uploads its
-      # own assets with --clobber. Tags come from merging the release-please PR.
-      - name: Publish to GitHub Release
-        if: ${{ startsWith(github.ref, 'refs/tags/v') }}
-        shell: bash
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          tag="${GITHUB_REF_NAME}"
-          gh release create "$tag" --repo "$GITHUB_REPOSITORY" --title "$tag" --generate-notes 2>/dev/null || true
-          gh release upload "$tag" dist/release/* --repo "$GITHUB_REPOSITORY" --clobber
-
-  # Publishes the npm package named in package.json (@twigpine/zero): first
-  # the five platform payloads (versions of the SAME package at suffixed
-  # versions like X.Y.Z-linux-x64, carrying the native binary + vendored
-  # helpers), then the wrapper at X.Y.Z whose optionalDependencies alias those
-  # platform versions. Platform versions MUST publish first — the wrapper pins
-  # them exactly, so the reverse order would open a window where installs
-  # resolve aliases that 404. See docs/NPM_PACKAGING.md for the full contract.
-  #
-  # Auth is npm OIDC trusted publishing: no NPM_TOKEN secret. The package's
-  # npmjs.com settings must list this repo + workflow file + the npm-publish
-  # environment as a trusted publisher, and provenance is then generated
-  # automatically. npm checks provenance against package.json `repository`,
-  # so that must name this repository. Note npm only allows configuring a
-  # trusted publisher on an EXISTING package, so a new package name starts
-  # with a one-time manual `npm publish` of an empty 0.0.0 placeholder.
-  # Because the platform payloads are versions of the same package, they reuse
-  # that single trusted-publisher configuration.
-  publish-npm:
-    name: Publish npm package
-    needs: package
-    if: ${{ startsWith(github.ref, 'refs/tags/v') }}
-    runs-on: ubuntu-latest
-    # Manual approval gate: this environment carries a required-reviewer rule
-    # (Settings -> Environments -> npm-publish), so the job pauses until a
-    # maintainer approves it in the Actions UI before anything reaches npm.
-    environment:
-      name: npm-publish
-      url: https://www.npmjs.com/package/@twigpine/zero
-    permissions:
-      contents: read
-      id-token: write # OIDC token exchange for npm trusted publishing + provenance
-    steps:
-      - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-        with:
-          persist-credentials: false
-
-      # No registry-url here on purpose: setup-node's registry-url writes an
-      # .npmrc line referencing $NODE_AUTH_TOKEN, and npm hard-fails on the
-      # unset env var. Trusted publishing needs no token at all.
-      - name: Setup Node
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
-        with:
-          node-version: 24
-
-      # OIDC trusted publishing needs npm >= 11.5.1. Use the npm bundled with
-      # the pinned Node toolchain (Node 24 ships >= 11.5.1) rather than pulling
-      # npm@latest from the registry inside the publish path — an unpinned
-      # install there would be avoidable supply-chain exposure. Fail fast if a
-      # future runner/toolchain change ever regresses the bundled npm.
-      - name: Check npm supports trusted publishing
-        run: |
-          npm --version | node -e '
-            const version = require("fs").readFileSync(0, "utf8").trim();
-            const [major, minor, patch] = version.split(".").map(Number);
-            const ok =
-              major > 11 ||
-              (major === 11 && (minor > 5 || (minor === 5 && patch >= 1)));
-            if (!ok) {
-              console.error(
-                `::error::bundled npm ${version} is too old for OIDC trusted ` +
-                  `publishing (needs >= 11.5.1) — bump node-version in this job.`,
-              );
-              process.exit(1);
-            }
-            console.log(`npm ${version} supports trusted publishing.`);
-          '
-
-      # Probe the exact URLs the wrapper's first-run downloader builds
-      # (internal/release/release.go asset-name scheme) as an anonymous client
-      # — install.sh/install.ps1 and `zero update` read them too. This also
-      # blocks publishing while the repo is still private: private release
-      # assets 404 without auth, exactly as they would for an installing user.
-      - name: Verify release assets are downloadable
-        shell: bash
-        run: |
-          version="$(node -p "require('./package.json').version")"
-          base="https://github.com/${GITHUB_REPOSITORY}/releases/download/v${version}"
-          for asset in \
-            "zero-v${version}-linux-x64.tar.gz" \
-            "zero-v${version}-linux-arm64.tar.gz" \
-            "zero-v${version}-macos-x64.tar.gz" \
-            "zero-v${version}-macos-arm64.tar.gz" \
-            "zero-v${version}-windows-x64.zip"; do
-            for url in "${base}/${asset}" "${base}/${asset}.sha256"; do
-              if ! curl -fsSLI -o /dev/null "$url"; then
-                echo "::error::${url} is not publicly downloadable — the wrapper's fallback downloader and install.sh would fail. Is the repo public and are all assets uploaded?" >&2
-                exit 1
-              fi
-            done
-          done
-          echo "all release assets for v${version} are publicly downloadable."
-
-      - name: Download release artifacts
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
-        with:
-          pattern: zero-*
-          path: dist/artifacts
-          merge-multiple: true
-
-      - name: Assemble npm packages
-        run: node scripts/npm/build-platform-packages.mjs --artifacts-dir dist/artifacts --out-dir dist/npm
-
-      # Platform payloads first under the `platform` dist-tag, then the wrapper,
-      # with the `latest` dist-tag checked before and after (platform versions
-      # are semver PRERELEASES of the wrapper version and must never become
-      # `latest`). Versions already on the registry are skipped, so "Re-run
-      # failed jobs" is safe after a partial publish.
-      - name: Publish npm packages
-        shell: bash
-        run: scripts/npm/publish-packages.sh dist/npm
-
-      # One final release under the pre-rename name @gitlawb/zero. Zero 0.9.0's
-      # `zero upgrade` runs `npm install -g @gitlawb/zero@latest`, and people
-      # reinstall the old name from shell history and old tutorials, so this
-      # release is published once more under it: the same verified artifacts,
-      # assembled as @gitlawb/zero, which the binary and wrapper recognise and
-      # answer with the switch steps (docs/NPM_PACKAGING.md). Runs after the
-      # @twigpine/zero publish, so the package it points at already exists.
-      #
-      # The gate keeps this to a single release: it is owed only while the old
-      # name's latest is still the last pre-rename version, or is this version
-      # (a re-run after it went out). After this release, `npm deprecate` the
-      # old package and delete these two steps.
-      - name: Check whether the final @gitlawb/zero release is owed
-        id: legacy-name
-        shell: bash
-        env:
-          LAST_PRE_RENAME_VERSION: 0.9.0
-        run: |
-          version="$(node -p "require('./package.json').version")"
-          latest=""
-          for _ in 1 2 3; do
-            latest="$(npm view @gitlawb/zero dist-tags.latest 2>/dev/null || true)"
-            if [ -n "$latest" ]; then
-              break
-            fi
-            sleep 10
-          done
-          if [ -z "$latest" ]; then
-            echo "::error::could not read the latest dist-tag of @gitlawb/zero from the registry" >&2
-            exit 1
-          fi
-          if [ "$latest" = "$LAST_PRE_RENAME_VERSION" ] || [ "$latest" = "$version" ]; then
-            owed=true
-          else
-            owed=false
-          fi
-          echo "@gitlawb/zero latest is ${latest}; final release under the old name owed: ${owed}"
-          echo "owed=${owed}" >> "$GITHUB_OUTPUT"
-
-      - name: Publish the final @gitlawb/zero release
-        if: ${{ steps.legacy-name.outputs.owed == 'true' }}
-        shell: bash
-        run: |
-          node scripts/npm/build-platform-packages.mjs \
-            --artifacts-dir dist/artifacts --out-dir dist/npm-legacy --package-name @gitlawb/zero
-          scripts/npm/publish-packages.sh dist/npm-legacy

.github/workflows/release-please.yml

@@ -1,35 +0,0 @@
-name: Release Please
-
-on:
-  push:
-    branches:
-      - main
-
-permissions:
-  contents: write # push the release-PR branch, create the tag + GitHub Release
-  pull-requests: write # open/update the release PR
-  issues: write # create/apply release-tracking labels on the release PR
-  actions: write # dispatch release-artifacts.yml once a release is cut
-
-jobs:
-  release-please:
-    name: Release PR / tag
-    runs-on: ubuntu-latest
-    steps:
-      - name: Run release-please
-        id: release
-        uses: googleapis/release-please-action@a02a34c4d625f9be7cb89156071d8567266a2445 # v4.2.0
-
-      # Tags created with the default GITHUB_TOKEN never fire `on: push: tags`
-      # workflows (GitHub suppresses workflows triggered by workflow-created
-      # events), so release-artifacts.yml would not run for a release-please
-      # tag. workflow_dispatch invoked through the API is exempt from that
-      # suppression — dispatch the artifacts build at the new tag explicitly.
-      - name: Build and publish release artifacts
-        if: ${{ steps.release.outputs.release_created }}
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          gh workflow run release-artifacts.yml \
-            --repo "$GITHUB_REPOSITORY" \
-            --ref "${{ steps.release.outputs.tag_name }}"

.github/workflows/zero-action-smoke.yml

@@ -1,120 +0,0 @@
-name: ZERO Action Smoke
-
-on:
-  pull_request:
-    paths:
-      - action.yml
-      - docs/GITHUB_ACTION.md
-      - scripts/action-summary.mjs
-      - scripts/action-summary.test.mjs
-      - .github/workflows/zero-action-smoke.yml
-  push:
-    branches:
-      - main
-    paths:
-      - action.yml
-      - docs/GITHUB_ACTION.md
-      - scripts/action-summary.mjs
-      - scripts/action-summary.test.mjs
-      - .github/workflows/zero-action-smoke.yml
-
-permissions:
-  contents: read
-
-jobs:
-  validate:
-    name: Validate action.yml
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-        with:
-          persist-credentials: false
-
-      - name: Setup Node
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
-        with:
-          node-version: 24
-
-      - name: Run action-summary test suite
-        run: node --test scripts/action-summary.test.mjs
-
-      - name: Parse action.yml and assert documented inputs
-        shell: bash
-        run: |
-          python3 - <<'PY'
-          import sys, yaml
-
-          with open("action.yml", "r", encoding="utf-8") as handle:
-              action_raw = handle.read()
-          doc = yaml.safe_load(action_raw)
-
-          assert isinstance(doc, dict), "action.yml must be a mapping"
-          assert doc.get("name"), "action must declare a name"
-          assert doc.get("description"), "action must declare a description"
-
-          runs = doc.get("runs") or {}
-          assert runs.get("using") == "composite", "action must be a composite action"
-          steps = runs.get("steps") or []
-          assert len(steps) >= 2, "composite action must define steps"
-
-          inputs = doc.get("inputs") or {}
-          expected_inputs = [
-              "prompt", "prompt-file", "provider", "api-key", "api-key-env",
-              "model", "mode", "auto", "self-correct", "add-dir", "worktree",
-              "output-format", "post-to", "slack-webhook-url", "github-token",
-              "working-directory", "zero-version", "zero-repo",
-          ]
-          missing = [name for name in expected_inputs if name not in inputs]
-          assert not missing, f"action.yml is missing inputs: {missing}"
-
-          # Conservative CI default: autonomy must default to 'low'.
-          assert inputs["auto"].get("default") == "low", "auto must default to low"
-          # stream-json is the documented default capture format.
-          assert inputs["output-format"].get("default") == "stream-json", \
-              "output-format must default to stream-json"
-
-          outputs = doc.get("outputs") or {}
-          for name in ("exit-code", "output-file", "summary"):
-              assert name in outputs, f"action.yml is missing output: {name}"
-
-          # The action must never enable unsafe mode implicitly.
-          serialized = yaml.safe_dump(doc)
-          assert "--skip-permissions-unsafe" not in serialized, \
-              "action must never pass --skip-permissions-unsafe"
-
-          run_zero = next((step for step in steps if step.get("name") == "Run ZERO"), None)
-          assert run_zero is not None, "action.yml must contain a Run ZERO step"
-          run_zero_script = run_zero.get("run") or ""
-          assert 'export "${ZERO_INPUT_API_KEY_ENV}=${ZERO_INPUT_API_KEY}"' in run_zero_script, \
-              "Run ZERO must export the provider key for the current step"
-          assert "later steps inherit" not in action_raw.lower(), \
-              "provider keys must not be documented as inherited by later steps"
-          for line in run_zero_script.splitlines():
-              if "GITHUB_ENV" in line and (
-                  "ZERO_INPUT_API_KEY" in line or "ZERO_INPUT_API_KEY_ENV" in line
-              ):
-                  raise AssertionError("provider key must not be persisted to GITHUB_ENV")
-
-          print(f"action.yml OK: {len(inputs)} inputs, {len(outputs)} outputs, {len(steps)} steps")
-          PY
-
-      - name: Shell-syntax-check embedded run blocks
-        shell: bash
-        run: |
-          set -euo pipefail
-          python3 - <<'PY'
-          import yaml
-          with open("action.yml", "r", encoding="utf-8") as handle:
-              doc = yaml.safe_load(handle)
-          steps = (doc.get("runs") or {}).get("steps") or []
-          for index, step in enumerate(steps):
-              run = step.get("run")
-              if run:
-                  with open(f"/tmp/zero_step_{index}.sh", "w", encoding="utf-8") as out:
-                      out.write(run)
-          PY
-          for script in /tmp/zero_step_*.sh; do
-            echo "bash -n ${script}"
-            bash -n "${script}"
-          done

.gitignore

@@ -27,10 +27,6 @@ report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 .cache
 *.tsbuildinfo
 
-# Go build/module caches (GOCACHE/GOMODCACHE pointed here for local runs)
-.gocache/
-.gomodcache/
-
 # IntelliJ based IDEs
 .idea
 
@@ -41,20 +37,11 @@ report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 
 /zero
 /zero.exe
-/zero-windows-command-runner.exe
-/zero-windows-sandbox-setup.exe
-/zero-skills
-/.zero-binary-version
-/snake-game.html
 
-# Superpowers skill artifacts (brainstorm mockups, specs, plans) — local only
-.superpowers/
+# local launcher with API key — never commit
+start-zenline.sh
+
+# user test artifact — never commit
+shop.html
+docs/audit-2026-06-07-deep-audit.md
 docs/superpowers/
-
-# Termux/Android build artifacts
-zero-termux-arm64
-zero-linux-sandbox
-zero-seccomp
-
-# Generated benchmark reports are evidence for one configuration, never tree state
-internal/perfbench/reports/*.json

.release-please-manifest.json

@@ -1 +0,0 @@
-{".":"0.10.0"}

AGENTS.MD

@@ -0,0 +1,16 @@
+---
+description: Use Go-native project commands; Node is only for the npm wrapper.
+globs: "*.go, *.js, package.json, .github/workflows/*.yml, docs/*.md"
+alwaysApply: false
+---
+
+Default to Go commands in this repository.
+
+- Use `go run ./cmd/zero` to launch the local CLI.
+- Use `go test ./...` for the repository test suite.
+- Use `go run ./cmd/zero-release build` to build the release-facing binary.
+- Use `go run ./cmd/zero-release smoke` to smoke-test the built binary.
+- Use `go run ./cmd/zero-release package` and `go run ./cmd/zero-release verify` for release artifact checks.
+- Use `go run ./cmd/zero-perf-bench` for performance smoke work.
+- Do not add Bun or TypeScript build/test dependencies for repository validation.
+- Use Node only when directly exercising the npm wrapper at `bin/zero.js`.

AGENTS.md

@@ -1,159 +0,0 @@
-# Repository Guidelines for Zero
-
-These instructions apply to all work in this repository. For the user-facing
-guide to extending Zero with specialists, hooks, plugins, MCP, and skills, see
-[docs/EXTENDING.md](docs/EXTENDING.md).
-
-## 1. Contribution and Pull Request Rules
-
-- Before opening any pull request, **all contributors**—including maintainers,
-  community contributors, and coding agents—must read and follow
-  [CONTRIBUTING.md](CONTRIBUTING.md).
-- Community pull requests require an existing parent issue with the
-  `issue-approved` label. Team members may open pull requests through the
-  internal development process described in `CONTRIBUTING.md`.
-- Keep each change focused on the approved or assigned scope. Do not include
-  unrelated fixes, refactors, formatting churn, generated output, or existing
-  local changes in the same commit or pull request.
-- Discuss new implementation languages, runtimes, major dependency changes,
-  and broad architectural rewrites with maintainers before implementation.
-- Pull request descriptions must explain what changed and why, link the parent
-  issue when required, and list the tests or verification performed. Include
-  screenshots or a short recording for user-visible UI changes when practical.
-
-## 2. Repository and Implementation Conventions
-
-- Use the Go version declared in `go.mod`. Do not hardcode a different local
-  toolchain version in scripts or documentation.
-- Use the repository build and release commands (`make` and
-  `go run ./cmd/zero-release ...`) instead of inventing parallel build flows.
-- Keep tests beside their source files (`foo_test.go` next to `foo.go`). Add a
-  regression test for behavior changes and run affected concurrent code under
-  the race detector.
-- Never edit files under `third_party/`; they are vendored.
-- Prefer one cross-platform function with small conditional checks over
-  duplicated platform-specific helpers when the behavior can remain unified.
-- Do not commit generated benchmark reports from
-  `internal/perfbench/reports/*.json`; reports are configuration-specific
-  evidence, not repository state.
-- Preserve the user's working tree. Do not overwrite, delete, stage, or commit
-  unrelated tracked or untracked files.
-
-## 3. Required Validation
-
-Run validation from the repository root before committing, opening a pull
-request, or completing an implementation task:
-
-1. **Formatting check**: `make fmt-check`. If it fails, format with
-   `go fmt ./...` (or `make fmt`) and run the check again.
-2. **Vet**: `go vet ./...` (or `make vet`).
-3. **Tests**: `go test ./...`. Use `make test` for the full race-enabled suite,
-   or run focused tests with `-race`, when concurrency is affected.
-4. **Build**: `go run ./cmd/zero-release build`.
-5. **Smoke test**: `go run ./cmd/zero-release smoke`.
-6. **Advisory lint**: `make lint-static`.
-7. **Security**: `make vulncheck`.
-8. **Diff hygiene**: `git diff HEAD --check` (covers staged and unstaged
-   tracked changes).
-
-`make lint` currently runs the formatting check and `go vet`; it does **not**
-run golangci-lint. The pinned golangci-lint job is advisory in CI while the
-existing repository-wide backlog is cleaned up. Fix findings introduced by or
-related to the current change. Unrelated pre-existing advisory findings do not
-justify expanding a focused pull request; report them separately.
-
-Formatting, vet, tests, build, smoke, diff hygiene, and govulncheck are hard
-requirements. If a related check fails, fix it. If a required check cannot run
-because of the environment or fails for an unrelated external reason, report
-the exact failure and obtain maintainer direction rather than silently ignoring
-it.
-
-## 4. Common Review Blockers
-
-These classes drive multi-round reviews. Fix them before requesting review:
-
-- **Fresh base:** Rebase onto the current PR base (`main` or stacked target)
-  before review. A stale head that rolls back mainline commits is a hard
-  blocker, not a merge-time detail. Resolve conflicts by keeping upstream
-  behavior unless the PR intentionally changes it.
-- **Platform truth:** Code and tests must pass on Linux, macOS, and Windows.
-  Compare paths after canonicalization (physical/`EvalSymlinks` form); never
-  assert raw `t.TempDir()` spellings (`/var` vs `/private/var` on macOS, short
-  paths on Windows). Prefer one cross-platform function with small `GOOS`
-  checks over duplicated helpers that drift.
-- **Supported targets only:** CONTRIBUTING.md names the five native prebuilt
-  release artifacts (`linux-x64`, `linux-arm64`, `macos-arm64`, `macos-x64`,
-  `windows-x64`) and the additional supported Android/Termux source-build and
-  artifact-fallback path. Other `GOOS`/`GOARCH` combinations, including
-  `plan9`, are unsupported and are not a review criterion. Do not block a PR
-  for failing to compile on an unsupported `GOOS`/`GOARCH`. Tests may use
-  `plan9` as a fixture for "unsupported".
-- **Security edges:** Keep secrets out of argv, env dumps, and logs. Redact
-  success and error paths (including stderr). Fail closed on ownership, lease,
-  and permission checks. Do not rely on pre-open path resolution
-  (`EvalSymlinks` then open) for containment: that is a check-to-use race.
-  Bind containment at open/use time with rooted or handle-relative,
-  traversal-resistant APIs. If a no-follow API is used, apply it to every
-  traversed component and enforce the platform's reparse-point protections;
-  final-component-only no-follow is insufficient. On multi-step setup, roll back
-  only what this run created; never destroy pre-existing resources you did
-  not create; never report success when cleanup or unlock failed.
-- **Normalize before matching:** Any transform that REMOVES bytes without
-  leaving a gap is also a reassembler, so it has to run before whatever matches
-  on the result. Redacting by shape and then stripping control bytes lets a
-  credential split by a NUL, an ESC or a C1 byte pass the patterns as two
-  fragments and be rejoined on the way out; comparing a path against a form
-  produced by the same resolver the kernel just used makes a redirect agree with
-  itself. Strip, decode, or canonicalize first, then match. The unsplit value
-  passing is not evidence, so the test needs a split case.
-- **Atomic shared state:** Write a complete temporary file, then atomically
-  replace the destination so concurrent readers never see a partial write.
-  Exclusive create or a write lock alone is not enough for readers. Serialize
-  the full read-modify-write sequence for lockfiles and shared stores.
-- **Tests match the claim:** Every behavior or security-boundary change needs a
-  regression test, including the failure path. Path-sensitive logic needs at
-  least one non-Linux path case (or a hermetic fake that exercises the same
-  normalization).
-- **Honest scope:** PR description, help text, and comments must match what
-  shipped. Wire advertised entry points or shrink the claim. Do not bundle
-  unrelated fixes. Do not widen security allowlists by name alone; check
-  classification and side effects too.
-- **Host tool version floors:** Zero shells out to `git` and other host tools,
-  and the project does not declare a minimum version for any of them. A flag,
-  subcommand, or config key that is not long-established therefore raises that
-  floor silently, and the failure on an older host is an unhelpful usage error
-  rather than a clear message. Before adding one, check when it landed and say
-  so where a caller would look. Record the floor for the exact subcommand you
-  call, not for the flag in general: `--end-of-options` reached Git's shared
-  parser in 2.24, but `git rev-parse` only accepted it from 2.30, and
-  `git checkout` and `git reset` later still. Likewise `--show-current` is
-  `git branch` 2.22, and `branch.autoSetupMerge=inherit` is 2.35. Then either
-  keep a fallback for older versions or gate the call. A test that depends on a
-  newer feature must skip below its floor instead of failing, and say which
-  version it needs.
-- **Prove the test fails without the change:** A regression test earns its
-  place only if it fails on the unfixed code, for the reason it claims. Run it
-  both ways and quote the failure in the PR. The recurring miss is not a
-  missing test but a test that never reaches the behavior it names, because an
-  earlier guard rejects the input first, so it passes with and without the fix.
-  When a test targets a specific layer, call that layer directly rather than
-  relying on a public entry point that may refuse earlier.
-- **Hermetic tests:** Tests must not read or write the developer's real config,
-  cache, or state directories. Redirect every root the code under test
-  resolves, not just config. `os.UserConfigDir` and `os.UserCacheDir` read
-  `XDG_CONFIG_HOME` and `XDG_CACHE_HOME` only on Linux and the BSDs. On macOS
-  they derive from `HOME`, and on Windows from `%AppData%` and `%LocalAppData%`.
-  Setting the XDG variables alone still leaves a macOS run writing to the real
-  home, so set `HOME` as well, or take the directory as a parameter. Apply it to
-  every test that reaches the same storage, not only the one where it was first
-  needed; a test that passes on a clean machine and pollutes a real one is a
-  blocker.
-- **Error codes vary by platform and by flag combination:** A check written
-  against the code one target returns can be silently inert on another while
-  still looking correct. `openat(O_DIRECTORY|O_NOFOLLOW)` on a symlink may
-  report `ENOTDIR` or `ELOOP` depending on the platform, because the kernel can
-  reject the directory mismatch before it ever resolves the link; accept both
-  rather than assuming the one POSIX names. On Windows, `\\?\` and `\\.\`
-  prefixes are not UNC paths, and an `NtCreateFile` information class must match
-  the struct actually passed. Confirm the code each supported target returns
-  instead of reasoning from the man page.

CHANGELOG.md

@@ -1,454 +0,0 @@
-# Changelog
-
-All notable changes to this project are documented in this file.
-
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project
-aims to follow [Semantic Versioning](https://semver.org/spec/v2.0.0.html) once the first release is
-tagged. Until then, source builds report the version `dev`.
-
-## [0.10.0](https://github.com/Twigpine/zero/compare/v0.9.0...v0.10.0) (2026-10-15)
-
-
-### Features
-
-* **notify:** make permission-prompt alerts on by default and discoverable ([#1001](https://github.com/Twigpine/zero/issues/1001)) ([7f8e5f0](https://github.com/Twigpine/zero/commit/7f8e5f08bb83371ce16cc54c97ab032a010026cf))
-* **npm:** publish as @twigpine/zero ([#1142](https://github.com/Twigpine/zero/issues/1142)) ([530563a](https://github.com/Twigpine/zero/commit/530563a0bb58d3cbadceb97b3ee234ef763124df))
-* **providers:** add GMI Cloud provider preset and partner listing ([#1127](https://github.com/Twigpine/zero/issues/1127)) ([1335ca6](https://github.com/Twigpine/zero/commit/1335ca6671023ecda81a3cfaae7e9f2ff5d6e0de))
-* **providers:** opt-in ZERO_RESPONSE_HEADER_TIMEOUT override for slow first-byte deployments ([#1106](https://github.com/Twigpine/zero/issues/1106)) ([ddc45f2](https://github.com/Twigpine/zero/commit/ddc45f2c8152fdd04b45dc11ed20d246fe7740a5))
-* **runtime:** add process-local per-model RPM admission limits ([#1116](https://github.com/Twigpine/zero/issues/1116)) ([eebb384](https://github.com/Twigpine/zero/commit/eebb384676fb567acc1f5a20dcbb17df8a03dc42))
-* **sessions:** add zero sessions prune, which never removes a session another process has open ([#1089](https://github.com/Twigpine/zero/issues/1089)) ([23c27e0](https://github.com/Twigpine/zero/commit/23c27e0778e3af54c04b8749d1eda846d3253f4e))
-
-
-### Bug Fixes
-
-* **acp:** persist the session permission mode across restarts ([#1134](https://github.com/Twigpine/zero/issues/1134)) ([bb96206](https://github.com/Twigpine/zero/commit/bb96206c2781e846fd13437113eec5790afe9c81)), closes [#1125](https://github.com/Twigpine/zero/issues/1125)
-* **acp:** persist token usage events for ACP sessions ([#1137](https://github.com/Twigpine/zero/issues/1137)) ([300cf62](https://github.com/Twigpine/zero/commit/300cf6275f8c94f06da3f00197d21cb8771842d9)), closes [#1118](https://github.com/Twigpine/zero/issues/1118)
-* **acp:** publish sub-run sessions loaded over ACP as view-only ([#1078](https://github.com/Twigpine/zero/issues/1078)) ([7f11491](https://github.com/Twigpine/zero/commit/7f11491078662b2d389c278f3ce5d41d956670c4))
-* **agent:** retry mid-stream transport aborts before tool dispatch ([#1076](https://github.com/Twigpine/zero/issues/1076)) ([b9ef1d2](https://github.com/Twigpine/zero/commit/b9ef1d271aa6ebc6d9adad2ef4ff0d695bb40da5))
-* **config:** sync atomic config replacements ([#1093](https://github.com/Twigpine/zero/issues/1093)) ([4d2e9f0](https://github.com/Twigpine/zero/commit/4d2e9f0d08472f7304652ef7896df587e1cc6c21))
-* **cron:** bound run history and read recent records from the tail ([#1094](https://github.com/Twigpine/zero/issues/1094)) ([42eb6ab](https://github.com/Twigpine/zero/commit/42eb6ab5fbe4ae9037f1f4cd42a00243c456a22e))
-* **cron:** preserve newer claims when overlapping runs complete ([#1090](https://github.com/Twigpine/zero/issues/1090)) ([2eb9d94](https://github.com/Twigpine/zero/commit/2eb9d94fac56d91d749ea4f96edcf1c87f79b48c))
-* **daemon:** bound pending sessions and prune on completion ([#1091](https://github.com/Twigpine/zero/issues/1091)) ([8a68660](https://github.com/Twigpine/zero/commit/8a68660161b04ce9668363faa14ff72c9fbad223))
-* **daemon:** do not retry workers that finished with a final exit code ([#1112](https://github.com/Twigpine/zero/issues/1112)) ([eefa978](https://github.com/Twigpine/zero/commit/eefa978f6183332b7416c70c25242bcdfba1a75c)), closes [#1100](https://github.com/Twigpine/zero/issues/1100)
-* **daemon:** stop worker process groups by their launch-time identity ([#1088](https://github.com/Twigpine/zero/issues/1088)) ([ab018b3](https://github.com/Twigpine/zero/commit/ab018b3098b5cb103cf8f90b8698d32a6687bdf7)), closes [#861](https://github.com/Twigpine/zero/issues/861)
-* **deps:** refresh the lockfile to patched hono and @hono/node-server ([#1080](https://github.com/Twigpine/zero/issues/1080)) ([aa52040](https://github.com/Twigpine/zero/commit/aa52040498e012c41d5e8f6027a91c18eff861d4))
-* **deps:** refresh the lockfile to patched shell-quote ([#1131](https://github.com/Twigpine/zero/issues/1131)) ([c56a4c4](https://github.com/Twigpine/zero/commit/c56a4c4e6e598504ab417e8cc4f5ab8d69f1b42f))
-* **execution:** reserve process capacity before launching ([#1092](https://github.com/Twigpine/zero/issues/1092)) ([bb3346a](https://github.com/Twigpine/zero/commit/bb3346a82883c19ed8815fe1e874f54950711d69))
-* **mcp:** forward image tool results on the existing image channel ([#1077](https://github.com/Twigpine/zero/issues/1077)) ([0324c1d](https://github.com/Twigpine/zero/commit/0324c1d4103328eb90cb24a0b582dba335255b5c))
-* **mcp:** refresh OAuth tokens for discovered endpoints and registered clients ([#1113](https://github.com/Twigpine/zero/issues/1113)) ([571af70](https://github.com/Twigpine/zero/commit/571af701bd3d8dfaf40f87b5b112b25e7def5b29)), closes [#1101](https://github.com/Twigpine/zero/issues/1101)
-* **oauth:** give every loopback callback server the bounded shutdown ([#1079](https://github.com/Twigpine/zero/issues/1079)) ([5473301](https://github.com/Twigpine/zero/commit/547330197b20ece591e077e876a4b8ffd015cb6e))
-* **providers:** send stable session headers to OpenCode ([#1060](https://github.com/Twigpine/zero/issues/1060)) ([99721c7](https://github.com/Twigpine/zero/commit/99721c762f37cd43ac511007a5f51d1846df959e))
-* **redaction:** redact adjacent AWS keys glued end to end ([#1095](https://github.com/Twigpine/zero/issues/1095)) ([df67ede](https://github.com/Twigpine/zero/commit/df67edec13345b73a85327adc003cacc7bdd8009))
-* **redaction:** redact credentials split by an invisible character ([#1067](https://github.com/Twigpine/zero/issues/1067)) ([e20b762](https://github.com/Twigpine/zero/commit/e20b7624261cef8336a8eb0fbdd44d536ad77fc2))
-* **sandbox:** say when a session's sandbox enforcement is degraded ([#1082](https://github.com/Twigpine/zero/issues/1082)) ([6b5852d](https://github.com/Twigpine/zero/commit/6b5852dc18bb256af1f25745697c2f2e3ea6f112))
-* **search:** redact every text field of session metadata, not ten of thirty ([#1073](https://github.com/Twigpine/zero/issues/1073)) ([9520f2b](https://github.com/Twigpine/zero/commit/9520f2bad7e09ce4a8d0d42be7ce77d2ae928ddd))
-* **security:** harden shell flag parsing, write roots, and formatters ([#1066](https://github.com/Twigpine/zero/issues/1066)) ([ac5fe0d](https://github.com/Twigpine/zero/commit/ac5fe0d21849b0f74af428dd3ca12e3b80a8b7aa))
-* **sessions:** keep a session lease for the life of the process, not of the Store ([#1144](https://github.com/Twigpine/zero/issues/1144)) ([883e5be](https://github.com/Twigpine/zero/commit/883e5bec24dac791d1d60618c7f4927f4659b687))
-* **tools:** hint when Windows resolves POSIX paths under root ([#1063](https://github.com/Twigpine/zero/issues/1063)) ([0c6f179](https://github.com/Twigpine/zero/commit/0c6f179a8443d4dfdfbbefe5cc6caf11c2a525f0))
-* **tui:** bound live dictation regions ([#985](https://github.com/Twigpine/zero/issues/985)) ([feb9927](https://github.com/Twigpine/zero/commit/feb992757c582c68f0397e070e206d4bf07071e1))
-* **tui:** show provider ownership in Recent and Favorites ([#1083](https://github.com/Twigpine/zero/issues/1083)) ([1697b7a](https://github.com/Twigpine/zero/commit/1697b7a5ce948e781877cdbe9223adac62c3fde6))
-* **tui:** stop held peer message Allow/Deny from deadlocking Update ([#1111](https://github.com/Twigpine/zero/issues/1111)) ([a195e88](https://github.com/Twigpine/zero/commit/a195e8848cec1a27b4fe1789ecc572b943c32186)), closes [#1099](https://github.com/Twigpine/zero/issues/1099)
-* unbreak main CI (cron claim tests, Go 1.26.9) ([#1124](https://github.com/Twigpine/zero/issues/1124)) ([2c418fc](https://github.com/Twigpine/zero/commit/2c418fc8ff6763de16703128f372fe526fddd331))
-
-## [0.9.0](https://github.com/Gitlawb/zero/compare/v0.8.0...v0.9.0) (2026-09-15)
-
-
-### Features
-
-* **acp:** add standard session list and resume ([#914](https://github.com/Gitlawb/zero/issues/914)) ([c1937df](https://github.com/Gitlawb/zero/commit/c1937dfac72e6ad0e5ade6e48e2d9c17d9c3e5d6))
-* **acp:** emit structured file changes in tool updates ([#999](https://github.com/Gitlawb/zero/issues/999)) ([faec8ee](https://github.com/Gitlawb/zero/commit/faec8ee2017fdd6d0c2c347add892cb73eb413d7))
-* **acp:** surface safe browser tool metadata ([#1000](https://github.com/Gitlawb/zero/issues/1000)) ([a6ec043](https://github.com/Gitlawb/zero/commit/a6ec0435e36b9bea9793b2fd97f2ecd30e3a0f9b))
-* **exec:** default headless runs to the turn-budget ceiling ([#1049](https://github.com/Gitlawb/zero/issues/1049)) ([9e609c5](https://github.com/Gitlawb/zero/commit/9e609c52420fd322f047fc238c04ac81dd623fdd))
-* **tui:** interactive terminal attach for tty exec sessions ([#1055](https://github.com/Gitlawb/zero/issues/1055)) ([d73ec81](https://github.com/Gitlawb/zero/commit/d73ec81e2d3facb5377bc9ad0fe2aa314628a0c0))
-* **tui:** offer mid-run model escalation behind --allow-escalation ([#1019](https://github.com/Gitlawb/zero/issues/1019)) ([91d921f](https://github.com/Gitlawb/zero/commit/91d921f4c5b8289a9e437f786218f1b48f2add5a))
-* **tui:** richer /resume session browser ([#1047](https://github.com/Gitlawb/zero/issues/1047)) ([2f53117](https://github.com/Gitlawb/zero/commit/2f531178f614e587b629e4f81e0470adda647fbd))
-
-
-### Bug Fixes
-
-* **acp:** make configured MCP tools callable ([#1003](https://github.com/Gitlawb/zero/issues/1003)) ([7f5e5af](https://github.com/Gitlawb/zero/commit/7f5e5af7bbdbe5bb4d91706146072d461c0234a4))
-* **agent:** stop the tool-schema ratchet meaning a different thing per host ([#1017](https://github.com/Gitlawb/zero/issues/1017)) ([f909266](https://github.com/Gitlawb/zero/commit/f9092668a832ea73a69551f0ea2df4f6eaf356df))
-* **background:** treat POSIX zombie leader as already-exited ([#981](https://github.com/Gitlawb/zero/issues/981)) ([1aacf38](https://github.com/Gitlawb/zero/commit/1aacf38b727d31b5ca09949316d6afa8292aec46))
-* **config:** lock config read-modify-write across processes ([#960](https://github.com/Gitlawb/zero/issues/960)) ([b04fe96](https://github.com/Gitlawb/zero/commit/b04fe96e9ef3f2deda4fb2a972270300629079d2))
-* **config:** preserve unknown top-level fields ([#984](https://github.com/Gitlawb/zero/issues/984)) ([488def6](https://github.com/Gitlawb/zero/commit/488def68dcc6d36701fdf171e94a74a436b090fc))
-* **daemon:** publish status files atomically ([#949](https://github.com/Gitlawb/zero/issues/949)) ([9001421](https://github.com/Gitlawb/zero/commit/90014210d2ada2e3d61f4eca5087d3f35a3c4b8b))
-* **installtxn:** put back an install a killed commit left behind ([#997](https://github.com/Gitlawb/zero/issues/997)) ([2837f5e](https://github.com/Gitlawb/zero/commit/2837f5efb38dcd3c69771b0ba31565f98a206120))
-* let the configured forward proxy through the loopback guard ([#1025](https://github.com/Gitlawb/zero/issues/1025)) ([1e4db7c](https://github.com/Gitlawb/zero/commit/1e4db7c6643ca7e2c3d8e4b8b30371cfbe43561e))
-* **lockutil:** use kernel-held advisory locks ([#950](https://github.com/Gitlawb/zero/issues/950)) ([6fe0d1e](https://github.com/Gitlawb/zero/commit/6fe0d1edcdbadea6d566800fbcca739c1cd54ea1))
-* **mcp:** discover OAuth through protected resource metadata ([#991](https://github.com/Gitlawb/zero/issues/991)) ([1b5db17](https://github.com/Gitlawb/zero/commit/1b5db1765672820caac1684b168c9898b5ba3593))
-* **mcp:** reject a server-initiated request as a streamable-HTTP response ([#1054](https://github.com/Gitlawb/zero/issues/1054)) ([2479d94](https://github.com/Gitlawb/zero/commit/2479d946c15dbf74ee3c04a637e97181d1786f08))
-* **oauth:** force-close loopback callback connections past the shutdown deadline ([#1051](https://github.com/Gitlawb/zero/issues/1051)) ([176f5a2](https://github.com/Gitlawb/zero/commit/176f5a242b754a86ea4c7121a8dcc1c0d72cf2e4))
-* **oauth:** Split an oversized keyring token blob across entries ([#1007](https://github.com/Gitlawb/zero/issues/1007)) ([275e248](https://github.com/Gitlawb/zero/commit/275e2486695338ce38193a6e3319f8b6a9a5c33c))
-* **providerio:** close idle connections periodically to prevent HTTP/2 PROTOCOL_ERROR ([#1058](https://github.com/Gitlawb/zero/issues/1058)) ([b76c764](https://github.com/Gitlawb/zero/commit/b76c764b77926891aa67163e6605a2d8540aacaa))
-* **providers:** register Atomic Chat as local OpenAI-compatible runtime ([#550](https://github.com/Gitlawb/zero/issues/550)) ([79fa142](https://github.com/Gitlawb/zero/commit/79fa1422ef1a3691b93342788453ebc284d57f9c))
-* **redaction:** split camelCase keys in normalizeKey ([#994](https://github.com/Gitlawb/zero/issues/994)) ([08fbea7](https://github.com/Gitlawb/zero/commit/08fbea7a3221d2061d88038924f90a4cba9af1ac))
-* **sandbox:** keep a derived ACL target inside the write root it came from ([#1040](https://github.com/Gitlawb/zero/issues/1040)) ([3b43c43](https://github.com/Gitlawb/zero/commit/3b43c43eca968c8619adadc81fcc1a17e220216a))
-* **sandbox:** keep Windows restricted-token SIDs narrow and fail closed on DenyRead ([#1006](https://github.com/Gitlawb/zero/issues/1006)) ([0207f2b](https://github.com/Gitlawb/zero/commit/0207f2b2697149a73ecc89a5ab5db0bd665f1911))
-* **sandbox:** Make WSL backend tests deterministic. ([#948](https://github.com/Gitlawb/zero/issues/948)) ([e59bf78](https://github.com/Gitlawb/zero/commit/e59bf78cabc2703678778b904c27c8bc8ef82bc8))
-* **sandbox:** protect worktree git pointers ([#805](https://github.com/Gitlawb/zero/issues/805)) ([f30f550](https://github.com/Gitlawb/zero/commit/f30f550e6037c53f8521ba2d59c984ae6c574917))
-* **sandbox:** refcount temporary roots so one holder's cleanup cannot revoke another's ([#911](https://github.com/Gitlawb/zero/issues/911)) ([7acac7a](https://github.com/Gitlawb/zero/commit/7acac7acee65565e25089f2a7b5813c086ce65eb))
-* **sessions:** carry an interrupted turn's work into the resume prompt ([#1016](https://github.com/Gitlawb/zero/issues/1016)) ([6ae8396](https://github.com/Gitlawb/zero/commit/6ae8396f0282a5f18a431f0c0ef1a272ecc2ca2b))
-* **sessions:** render resume context fields in key order ([#1043](https://github.com/Gitlawb/zero/issues/1043)) ([da244bc](https://github.com/Gitlawb/zero/commit/da244bcbfcfa05e414567ac0acc3cf8ba745ad7d))
-* **specialist:** keep the pinned model when a specialist is resumed ([#1009](https://github.com/Gitlawb/zero/issues/1009)) ([aadb4a2](https://github.com/Gitlawb/zero/commit/aadb4a27e9cdb41e774e8e1a8f23cf9c2fb50db2))
-* **swarm:** stop original member before handoff ([#957](https://github.com/Gitlawb/zero/issues/957)) ([0021475](https://github.com/Gitlawb/zero/commit/0021475d4c58c91911098f414795512cf60a0b56))
-* **tools:** an edit keeps the reads it did not disturb ([#908](https://github.com/Gitlawb/zero/issues/908)) ([1649008](https://github.com/Gitlawb/zero/commit/1649008506da0e675431dc056251a01891b15cc8))
-* **tools:** make apply_patch tolerant and re-expose edit_file ([#956](https://github.com/Gitlawb/zero/issues/956)) ([2749447](https://github.com/Gitlawb/zero/commit/2749447cdce4ae5dd333538b36fa919b80ecc66d))
-* **tools:** reject fuzzy edits with drifted content ([#983](https://github.com/Gitlawb/zero/issues/983)) ([8b3d1b1](https://github.com/Gitlawb/zero/commit/8b3d1b1597b04bfa6d4bc7f912abc13ca80a6298))
-* **tools:** say when format-on-write ran out of time ([#1044](https://github.com/Gitlawb/zero/issues/1044)) ([6937a30](https://github.com/Gitlawb/zero/commit/6937a309cf00825572210a7610a1f3ea8b74c2f9))
-* **tui:** move voice capture to Ctrl+Space ([#968](https://github.com/Gitlawb/zero/issues/968)) ([eeea330](https://github.com/Gitlawb/zero/commit/eeea3308fed38b37b203522624babaf2f30df91f))
-* **update:** keep Windows failed-restore state in trusted recovery records ([#979](https://github.com/Gitlawb/zero/issues/979)) ([a3852ba](https://github.com/Gitlawb/zero/commit/a3852bac595e06c5d3ca9da22212b281b8796802))
-
-
-### Performance Improvements
-
-* **agent:** cheap compaction — dedicated summarizer model, input cap… ([#532](https://github.com/Gitlawb/zero/issues/532)) ([6645f97](https://github.com/Gitlawb/zero/commit/6645f9744b37dda4d52ecc4631578d62cefc89de))
-* **providers:** parallelize isolated provider unit tests and shrink retry backoffs ([#955](https://github.com/Gitlawb/zero/issues/955)) ([d6b25fc](https://github.com/Gitlawb/zero/commit/d6b25fc3039a6b7d72a5703a87a097449792b102))
-* reduce startup and turn overhead ([#932](https://github.com/Gitlawb/zero/issues/932)) ([1fde941](https://github.com/Gitlawb/zero/commit/1fde941803c4295c11a4a14559f3c5217d1a9e69))
-
-## [0.8.0](https://github.com/Gitlawb/zero/compare/v0.7.0...v0.8.0) (2026-08-21)
-
-
-### Features
-
-* **security:** path-jail primitive, credential-store locking, worktree git hardening ([#891](https://github.com/Gitlawb/zero/issues/891)) ([060d38c](https://github.com/Gitlawb/zero/commit/060d38ce716feb7c5b6657b082cd35cb8dda3d75))
-* **update:** recognise Homebrew installs and add mise, go install docs ([#910](https://github.com/Gitlawb/zero/issues/910)) ([01c3498](https://github.com/Gitlawb/zero/commit/01c3498205e69d26e5f929225f9455b276444f39))
-* use Exa as default search provider ([#926](https://github.com/Gitlawb/zero/issues/926)) ([1ec7219](https://github.com/Gitlawb/zero/commit/1ec7219aee7b2840481ab0905f131644e27d2a4e))
-* **zerogit:** auto-create a conventional branch before push/pr on default branch ([#671](https://github.com/Gitlawb/zero/issues/671)) ([d065467](https://github.com/Gitlawb/zero/commit/d065467cd3ec3ed91c5dc60554c36fc4b4d6de4c))
-
-
-### Bug Fixes
-
-* **acp:** three defects a desktop ACP client hits ([#915](https://github.com/Gitlawb/zero/issues/915)) ([a78c6c3](https://github.com/Gitlawb/zero/commit/a78c6c357e1d21146d7cd2e8030a754e06f7f1f5))
-* bump Go to 1.26.6 for stdlib vulnerability fixes ([#903](https://github.com/Gitlawb/zero/issues/903)) ([dc15e82](https://github.com/Gitlawb/zero/commit/dc15e822987d8d7de467c62c375518f435b74d8c))
-* **daemon:** clean up child after startup timeout ([#774](https://github.com/Gitlawb/zero/issues/774)) ([9c29209](https://github.com/Gitlawb/zero/commit/9c292092a26c9092fd873d072b0af1b0d9d39ef0))
-* **dictation:** redact API keys from streaming transcriber errors ([#852](https://github.com/Gitlawb/zero/issues/852)) ([64a783b](https://github.com/Gitlawb/zero/commit/64a783b08caa2c7b21f188033b9ed84a14e00e84))
-* **modelregistry:** expose reasoning effort for DeepSeek V4 models ([#931](https://github.com/Gitlawb/zero/issues/931)) ([90dcfd1](https://github.com/Gitlawb/zero/commit/90dcfd127e8a6d9902ec9f4e72f6d03fef1a0fc6))
-* **providers:** discover ChatGPT capabilities ([#890](https://github.com/Gitlawb/zero/issues/890)) ([2d2450e](https://github.com/Gitlawb/zero/commit/2d2450e9a744349f0d01b1d4e9ba29c24ba5650d))
-* **sandbox:** normalize launcher names before the command-prefix denylist ([#934](https://github.com/Gitlawb/zero/issues/934)) ([6edf9a8](https://github.com/Gitlawb/zero/commit/6edf9a8b78dc030dc44598919db1c7fa9d4f809a))
-
-## [0.7.0](https://github.com/Gitlawb/zero/compare/v0.6.0...v0.7.0) (2026-08-10)
-
-
-### Features
-
-* **agent:** add PermissionModePlan for interactive read-only planning ([#853](https://github.com/Gitlawb/zero/issues/853)) ([0176ee4](https://github.com/Gitlawb/zero/commit/0176ee49ffddcff6f7edf6ae2ade4967e5b22cc3))
-* **providers:** live model lists for OpenRouter and OpenGateway ([#860](https://github.com/Gitlawb/zero/issues/860)) ([fb4f293](https://github.com/Gitlawb/zero/commit/fb4f293c20eb860ca388a10d22fd566ce282ba1f))
-* **tools:** give tool results an image channel and add view_image ([#843](https://github.com/Gitlawb/zero/issues/843)) ([cd0eb19](https://github.com/Gitlawb/zero/commit/cd0eb194e4df4b844785796c0701216740a56344))
-* **tui:** replace /retitle with local /rename ([#826](https://github.com/Gitlawb/zero/issues/826)) ([5886354](https://github.com/Gitlawb/zero/commit/588635487f22ef4d62d350140a219b7b8bb24119))
-
-
-### Bug Fixes
-
-* **agent:** end the additional_permissions retry loop ([#864](https://github.com/Gitlawb/zero/issues/864)) ([4ca4fa7](https://github.com/Gitlawb/zero/commit/4ca4fa75d31b139dbe55a3badf17da86892ab001))
-* **agent:** tell the user a prefix approval leaves the sandbox ([#885](https://github.com/Gitlawb/zero/issues/885)) ([2ec5c3a](https://github.com/Gitlawb/zero/commit/2ec5c3ae6b8fb543887bdeafdb34c4da057b8d36))
-* **cli:** report MCP servers that failed to start ([#822](https://github.com/Gitlawb/zero/issues/822)) ([#827](https://github.com/Gitlawb/zero/issues/827)) ([021281e](https://github.com/Gitlawb/zero/commit/021281ebbab3f2bbe6a77b2dab4bf121bcfe6b52))
-* **lsp:** dispatch notifications off read loop ([#759](https://github.com/Gitlawb/zero/issues/759)) ([936aa4e](https://github.com/Gitlawb/zero/commit/936aa4e77cf49738560a89395b8ba4d22263a396))
-* **mcp:** name the non-text blocks a tool result drops ([#874](https://github.com/Gitlawb/zero/issues/874)) ([027a670](https://github.com/Gitlawb/zero/commit/027a67080bea511b876c284bc911ef011eceb308))
-* **sandbox:** deny reads of Zero credential stores ([#681](https://github.com/Gitlawb/zero/issues/681)) ([55fa05f](https://github.com/Gitlawb/zero/commit/55fa05f0ab5a01b495345d43464606cd19a31b4f))
-* **sandbox:** stop the Windows write jail honouring Everyone-granted paths ([#865](https://github.com/Gitlawb/zero/issues/865)) ([91b413c](https://github.com/Gitlawb/zero/commit/91b413c514cc1607d5b4e7936780d40569239814))
-* **secrets,worktrees:** fix secret redaction leakage and prune stale worktrees ([#855](https://github.com/Gitlawb/zero/issues/855)) ([ff62f73](https://github.com/Gitlawb/zero/commit/ff62f73b7f4dc5e2472db21acba43cf6140c06d1))
-* **specialist:** make overwrites atomic ([#757](https://github.com/Gitlawb/zero/issues/757)) ([30f6d8f](https://github.com/Gitlawb/zero/commit/30f6d8f591a0b81638b4182ff56c86c8a50a5c70))
-* suppress gosec G204 warning for trusted local config commands ([#848](https://github.com/Gitlawb/zero/issues/848)) ([c52db05](https://github.com/Gitlawb/zero/commit/c52db055b0b213758a33c5c5627a411e052f8de4))
-* **tui:** a copied NUL byte no longer panics the TUI on Windows ([#876](https://github.com/Gitlawb/zero/issues/876)) ([cae0269](https://github.com/Gitlawb/zero/commit/cae0269e77e7a0a493cf799b41c653c9ff9a19de)), closes [#875](https://github.com/Gitlawb/zero/issues/875)
-* **tui:** exclude permission waits from turn time ([#820](https://github.com/Gitlawb/zero/issues/820)) ([15eb16f](https://github.com/Gitlawb/zero/commit/15eb16f736f903c94203207032f98aacbcf06318))
-* **tui:** fall back to CellMotion where AllMotion is unreliable ([#872](https://github.com/Gitlawb/zero/issues/872)) ([7fbd864](https://github.com/Gitlawb/zero/commit/7fbd864e91433441489902571ea394ebc5b7bd0d))
-* **tui:** fill alt-screen frame with theme panel background ([#850](https://github.com/Gitlawb/zero/issues/850)) ([020c28e](https://github.com/Gitlawb/zero/commit/020c28eaf95e2f38853f99fc06a13cd1568bf3c9))
-* **tui:** hide unavailable sidebar shortcut ([#821](https://github.com/Gitlawb/zero/issues/821)) ([845df6c](https://github.com/Gitlawb/zero/commit/845df6c7d28e02f475e90acfe838733eb37e6aa2))
-* use OAuth credentials in provider health checks ([#828](https://github.com/Gitlawb/zero/issues/828)) ([d37de92](https://github.com/Gitlawb/zero/commit/d37de9214b1ba86542f4f5ef3b060bb96849763b))
-
-
-### Performance Improvements
-
-* compact common test output ([#846](https://github.com/Gitlawb/zero/issues/846)) ([edf660a](https://github.com/Gitlawb/zero/commit/edf660ab85131f90a452cee51dc2c3a5cf62d632))
-* improve harness context efficiency ([#838](https://github.com/Gitlawb/zero/issues/838)) ([8e26679](https://github.com/Gitlawb/zero/commit/8e266797a8305e689806eadcf9698da2796481ab))
-
-## [0.6.0](https://github.com/Gitlawb/zero/compare/v0.5.0...v0.6.0) (2026-07-29)
-
-
-### Features
-
-* add persistent session goals ([#803](https://github.com/Gitlawb/zero/issues/803)) ([5d1869e](https://github.com/Gitlawb/zero/commit/5d1869e7bc193c97e07418b57b823905c1151d5d))
-* **providers:** add Fireworks AI provider preset ([#772](https://github.com/Gitlawb/zero/issues/772)) ([58daea7](https://github.com/Gitlawb/zero/commit/58daea7a482927e5ab35afaf97761c60bb35e113))
-* **skills:** report hash drift in skill info ([#795](https://github.com/Gitlawb/zero/issues/795)) ([9fbdc34](https://github.com/Gitlawb/zero/commit/9fbdc341551601c13434cf7b9b6f5e4ea4c483b1))
-
-
-### Bug Fixes
-
-* **acp:** interrupt idle reads on cancellation ([#782](https://github.com/Gitlawb/zero/issues/782)) ([15b7a54](https://github.com/Gitlawb/zero/commit/15b7a5475cfeefddbc59634551451a8872b996b7))
-* **cli:** include plugins info in shell completions ([#794](https://github.com/Gitlawb/zero/issues/794)) ([fa8734f](https://github.com/Gitlawb/zero/commit/fa8734f17927de8832dfe041e043cfb86f93d12a))
-* **config:** kill provider-command process tree via job object on Windows ([#690](https://github.com/Gitlawb/zero/issues/690)) ([5c58256](https://github.com/Gitlawb/zero/commit/5c58256abc29c185b449f8ce79647eb3fae61882))
-* **config:** make the provider-command timeout an upper bound ([#811](https://github.com/Gitlawb/zero/issues/811)) ([#813](https://github.com/Gitlawb/zero/issues/813)) ([1c38e8c](https://github.com/Gitlawb/zero/commit/1c38e8cba50db255f3cda8b7cf4298712b2933e1))
-* **config:** stop billing provider-command fixtures to the 5s timeout ([#810](https://github.com/Gitlawb/zero/issues/810)) ([f5fa4ff](https://github.com/Gitlawb/zero/commit/f5fa4ffc64537897aa78a56edca36d8f1dacd021))
-* **cron:** reserve job IDs atomically ([#686](https://github.com/Gitlawb/zero/issues/686)) ([d9b882e](https://github.com/Gitlawb/zero/commit/d9b882eb0a94f38de8447cb54b57860ccd8ed053))
-* **lint:** resolve static analysis baseline ([#769](https://github.com/Gitlawb/zero/issues/769)) ([583e653](https://github.com/Gitlawb/zero/commit/583e6530bd849a8efcb2b88bbe8c297e8592e62c))
-* **providers:** retry provably pre-send transport failures ([#447](https://github.com/Gitlawb/zero/issues/447)) ([#750](https://github.com/Gitlawb/zero/issues/750)) ([8acd42a](https://github.com/Gitlawb/zero/commit/8acd42a3bd743a35807d762f23a33fb61c171839))
-* **sandbox:** add platform-specific write lock around grant state file ([#752](https://github.com/Gitlawb/zero/issues/752)) ([#755](https://github.com/Gitlawb/zero/issues/755)) ([88fb7b6](https://github.com/Gitlawb/zero/commit/88fb7b6192c1ac8173089967d5e9119f92d7a101))
-* **sandbox:** clarify scoped permission prompts ([#798](https://github.com/Gitlawb/zero/issues/798)) ([9fe02ae](https://github.com/Gitlawb/zero/commit/9fe02ae52e3234cb9dae76e0c5594a287ccbb52a))
-* **sandbox:** deny reads of git's credential stores ([#815](https://github.com/Gitlawb/zero/issues/815)) ([#816](https://github.com/Gitlawb/zero/issues/816)) ([33c94ec](https://github.com/Gitlawb/zero/commit/33c94ec7a3e7987e6e36b5fd5e037ff4e6e84c26))
-* **sandbox:** preserve user config and retry denied writes ([#801](https://github.com/Gitlawb/zero/issues/801)) ([81a5e6c](https://github.com/Gitlawb/zero/commit/81a5e6cb716ba4b7ecf7ff3ff261dfa51fd01098))
-* **sandbox:** scrub the daemon token file pointer ([#677](https://github.com/Gitlawb/zero/issues/677)) ([#818](https://github.com/Gitlawb/zero/issues/818)) ([3e7692d](https://github.com/Gitlawb/zero/commit/3e7692d8f0885d346809869935c81a9cf055d89e))
-* **swarm:** close lifecycle admission on shutdown ([#776](https://github.com/Gitlawb/zero/issues/776)) ([bdbda89](https://github.com/Gitlawb/zero/commit/bdbda89f3e42d93e8058ab3e1e9ef402659530cd))
-* **tui:** fix rendering corruption over multipass + Windows Terminal ([#709](https://github.com/Gitlawb/zero/issues/709)) ([5bb1bc1](https://github.com/Gitlawb/zero/commit/5bb1bc11c3188dcea7709ff07c8b25dda3541de8))
-* **tui:** paste clipboard images with Ctrl+V ([#534](https://github.com/Gitlawb/zero/issues/534)) ([#807](https://github.com/Gitlawb/zero/issues/807)) ([ec3b822](https://github.com/Gitlawb/zero/commit/ec3b8225050eb62f0f41a9582ed2881d2f9dcc8e))
-* **tui:** reset quiet clock for new runs ([#799](https://github.com/Gitlawb/zero/issues/799)) ([a4a805a](https://github.com/Gitlawb/zero/commit/a4a805a6c82c51cb255e909bd87ca183c8805cf2))
-* **windows:** use PowerShell for command execution ([#804](https://github.com/Gitlawb/zero/issues/804)) ([518d2e5](https://github.com/Gitlawb/zero/commit/518d2e53ba3fa073090a9b41c278face85b59b64))
-
-## [0.5.0](https://github.com/Gitlawb/zero/compare/v0.4.0...v0.5.0) (2026-07-22)
-
-
-### Features
-
-* **plugins:** add zero plugins info command ([#773](https://github.com/Gitlawb/zero/issues/773)) ([2479884](https://github.com/Gitlawb/zero/commit/2479884dea49580c853a53536c3bbab22ce8a2bf))
-* **sandbox:** disable the sandbox via config ([#687](https://github.com/Gitlawb/zero/issues/687)) ([#746](https://github.com/Gitlawb/zero/issues/746)) ([a21a052](https://github.com/Gitlawb/zero/commit/a21a052a4a32ce9cb3c93c94350cd24e138532cd))
-* **sandbox:** unify command execution and enforcement ([#781](https://github.com/Gitlawb/zero/issues/781)) ([96859c9](https://github.com/Gitlawb/zero/commit/96859c9bd16f6dad4e332efc7e68178b9116118a))
-* **tui:** add /undo as an alias for /rewind ([#698](https://github.com/Gitlawb/zero/issues/698)) ([#747](https://github.com/Gitlawb/zero/issues/747)) ([8c6d302](https://github.com/Gitlawb/zero/commit/8c6d3022bd7801eaad6a0440bb21a27221887297))
-* **tui:** add isolated /btw conversations ([#748](https://github.com/Gitlawb/zero/issues/748)) ([2e267bd](https://github.com/Gitlawb/zero/commit/2e267bdbee4a77813e93a7ab51f0c575b66cee8c))
-* **tui:** permission prompt takes free-text feedback inline ([#780](https://github.com/Gitlawb/zero/issues/780)) ([3967d49](https://github.com/Gitlawb/zero/commit/3967d49d64998341af8ef6d7523fc63aeb2a5a7a))
-
-
-### Bug Fixes
-
-* **agent:** stop write_stdin session_id probing thrash ([#702](https://github.com/Gitlawb/zero/issues/702)) ([#749](https://github.com/Gitlawb/zero/issues/749)) ([fbf8598](https://github.com/Gitlawb/zero/commit/fbf85984f679058125951fe2d5e4f200e09a3e2f))
-* **cli:** warn when ZERO_PROVIDER overrides a providers-use selection ([#767](https://github.com/Gitlawb/zero/issues/767)) ([3524f79](https://github.com/Gitlawb/zero/commit/3524f795e5fdbb827166a84f03351cedfc9eba30))
-* **doctor:** detect missing native binary during runtime checks ([#450](https://github.com/Gitlawb/zero/issues/450)) ([7796022](https://github.com/Gitlawb/zero/commit/77960229b839dca856616f846839aa773f2923f7))
-* **lsp:** make the real-gopls check opt-in so a broken gopls can't fail the suite ([#684](https://github.com/Gitlawb/zero/issues/684)) ([#766](https://github.com/Gitlawb/zero/issues/766)) ([b1f4173](https://github.com/Gitlawb/zero/commit/b1f41735a7f6b7928a1875e986a4dca39d106cb9))
-* make extension installs transactional ([#762](https://github.com/Gitlawb/zero/issues/762)) ([baa4be1](https://github.com/Gitlawb/zero/commit/baa4be13ac5321da4e9f53e864dd1cd395481200))
-* **oauth:** refuse redirects on credential POSTs ([#729](https://github.com/Gitlawb/zero/issues/729)) ([#741](https://github.com/Gitlawb/zero/issues/741)) ([974fc03](https://github.com/Gitlawb/zero/commit/974fc036c2f9a194722f2e8fddbb4fdbf797effe))
-* **oauth:** validate discovered endpoints before merge/use ([#511](https://github.com/Gitlawb/zero/issues/511)) ([#739](https://github.com/Gitlawb/zero/issues/739)) ([ce4a996](https://github.com/Gitlawb/zero/commit/ce4a996ffac4482e704f0fd61b3e442398fb2401))
-* **perfbench:** absolutize the bench binary and make errored tasks first-class ([#730](https://github.com/Gitlawb/zero/issues/730)) ([dbd9443](https://github.com/Gitlawb/zero/commit/dbd94430143df6754d68551d1028ad8f15b82f1b))
-* **perfbench:** grant write tools so mutating tasks measure real edits ([#763](https://github.com/Gitlawb/zero/issues/763)) ([e1975c1](https://github.com/Gitlawb/zero/commit/e1975c1b396b3236ed648870230b4f85863b1d03))
-* **perfbench:** keep the stamped answer file out of negative oracle greps ([#737](https://github.com/Gitlawb/zero/issues/737)) ([015452c](https://github.com/Gitlawb/zero/commit/015452c1c98a39eabb021324182094e188a8bd47))
-* **providers:** stop "provider not found" for env-derived profiles ([#716](https://github.com/Gitlawb/zero/issues/716)) ([4cbd144](https://github.com/Gitlawb/zero/commit/4cbd144d11e5cb67bc5fea46f5b294562dac7a1a))
-* **sandbox:** AST second opinion for interactive-command bypasses ([#473](https://github.com/Gitlawb/zero/issues/473)) ([#745](https://github.com/Gitlawb/zero/issues/745)) ([f079b90](https://github.com/Gitlawb/zero/commit/f079b90f82dac7b7ae0864b279dc9094e31a6627))
-* **sandbox:** bind Windows elevated ACL setup to one no-follow handle ([#765](https://github.com/Gitlawb/zero/issues/765)) ([4945684](https://github.com/Gitlawb/zero/commit/4945684fa26aa5994eda59dcabedc817423c535d))
-* **sandbox:** don't auto-allow shell when re-entrancy skips wrapping ([#727](https://github.com/Gitlawb/zero/issues/727)) ([#744](https://github.com/Gitlawb/zero/issues/744)) ([6849011](https://github.com/Gitlawb/zero/commit/684901165d1b7f50a8bb4af31b1c1951e6926a79))
-* **tools:** give write_stdin's invalid-session errors the same recovery guidance ([#749](https://github.com/Gitlawb/zero/issues/749) follow-up) ([#768](https://github.com/Gitlawb/zero/issues/768)) ([da9fb50](https://github.com/Gitlawb/zero/commit/da9fb50f549f6701eb136fc99f6178d0772d9334))
-* **tools:** read_file recovers a backwards line range instead of erroring ([#779](https://github.com/Gitlawb/zero/issues/779)) ([89bdc67](https://github.com/Gitlawb/zero/commit/89bdc6719a1e1b3a3ef0e36b91a7839b3efdfba9))
-* **tui:** cache settled alt-screen transcript ([#647](https://github.com/Gitlawb/zero/issues/647)) ([d74ceb1](https://github.com/Gitlawb/zero/commit/d74ceb11271ed68a21c19248210e098f411805fb))
-* **tui:** model rows labelled by id when the description is prose; keep the sidebar under the / palette ([#775](https://github.com/Gitlawb/zero/issues/775)) ([b30c397](https://github.com/Gitlawb/zero/commit/b30c3971b40b06ba52ad649ba9dc0ad560d4be4c))
-* **tui:** stop the permission card clashing on cool themes ([#778](https://github.com/Gitlawb/zero/issues/778)) ([722bb31](https://github.com/Gitlawb/zero/commit/722bb3121682d9cd9cd4bc6c127e9014d719262a))
-
-
-### Performance Improvements
-
-* **agent:** concurrent read-only tool batches via capability gate ([#715](https://github.com/Gitlawb/zero/issues/715)) ([31d45d5](https://github.com/Gitlawb/zero/commit/31d45d5f14e915acb9946e8b8eb81632c48f126a))
-* **agent:** execution profiles with one-shot posture escalation (PR10b+PR10c) ([#740](https://github.com/Gitlawb/zero/issues/740)) ([378d538](https://github.com/Gitlawb/zero/commit/378d538e240c289e57821e9f9628f76034419d01))
-* **agent:** posture-escalation signals and controller (PR10a) ([#736](https://github.com/Gitlawb/zero/issues/736)) ([af875df](https://github.com/Gitlawb/zero/commit/af875df58775484304fc65586bd6c74552ad01a2))
-* **agent:** preserve prompt cache prefixes ([#760](https://github.com/Gitlawb/zero/issues/760)) ([739a47e](https://github.com/Gitlawb/zero/commit/739a47e3eac92c3decc8734f52a4d99c7480c3ca))
-* **openai:** optimized turn session — background prewarm and prefix telemetry (PR8) ([#723](https://github.com/Gitlawb/zero/issues/723)) ([60dc84e](https://github.com/Gitlawb/zero/commit/60dc84e7a38c5544ebc047f3cfaf4625dd1e83b5))
-* **output:** add token-aware semantic output budgeting (PR11) ([#717](https://github.com/Gitlawb/zero/issues/717)) ([e5670c4](https://github.com/Gitlawb/zero/commit/e5670c427ff39c628fb0822fd5c9317ee2174583))
-* **providers:** provider capabilities and default turn-session adapter (PR7) ([#720](https://github.com/Gitlawb/zero/issues/720)) ([30e2c3f](https://github.com/Gitlawb/zero/commit/30e2c3f7ffa1d5e487bd10b59d4e823cda191d48))
-* **turn-bench:** Phase 0 — strengthen oracles so pass rate can't be misread as correctness ([#712](https://github.com/Gitlawb/zero/issues/712)) ([727ad4d](https://github.com/Gitlawb/zero/commit/727ad4d321fab45d0cf40f8535522e3d94e55c4a))
-
-## [0.4.0](https://github.com/Gitlawb/zero/compare/v0.3.0...v0.4.0) (2026-07-17)
-
-
-### Features
-
-* **aimlapi:** AI/ML API provider with guided onboarding (top-up + key issuance) ([#655](https://github.com/Gitlawb/zero/issues/655)) ([6b9c2f0](https://github.com/Gitlawb/zero/commit/6b9c2f0c083e02bcd3aad68fb7af0501a9e7cd61))
-* **cli:** show ZERO wordmark on --version ([#673](https://github.com/Gitlawb/zero/issues/673)) ([9acb411](https://github.com/Gitlawb/zero/commit/9acb4113cc3337b3f361a16278e9cf11ca105e34))
-* **cli:** wire MCP serve WorkspaceRoot and --add-dir scope ([#694](https://github.com/Gitlawb/zero/issues/694)) ([75a78e7](https://github.com/Gitlawb/zero/commit/75a78e715bf23154f69c8c79cb58eb4b535b2a2a))
-* **npm:** ship the native binary as platform optionalDependencies ([#626](https://github.com/Gitlawb/zero/issues/626)) ([5e1405d](https://github.com/Gitlawb/zero/commit/5e1405d0b7abff5b3ccb3cfdb66d64d6d3322922))
-* **perf:** emit prompt-prefix hash fingerprint per turn ([#704](https://github.com/Gitlawb/zero/issues/704)) ([1c5c6e7](https://github.com/Gitlawb/zero/commit/1c5c6e78a8a0e228bdf53d7be90934fbce9d98c3))
-* **providers:** add AI/ML API preset (rebased onto main) ([#621](https://github.com/Gitlawb/zero/issues/621)) ([d66a9dd](https://github.com/Gitlawb/zero/commit/d66a9dda69c32aa59f4bea903cfefe00d4b7adef))
-* **providers:** refresh MiniMax model coverage ([#665](https://github.com/Gitlawb/zero/issues/665)) ([fa3052a](https://github.com/Gitlawb/zero/commit/fa3052a1422a4ad30a3a6295829564f42dee31a8))
-* **skills:** discover shared ~/.agents/skills with multi-root skill loading ([#696](https://github.com/Gitlawb/zero/issues/696)) ([7d57999](https://github.com/Gitlawb/zero/commit/7d579996b43741a2e57e3e38fcdd8484fcfc34e9))
-* **tui:** Ctrl+X leader chords and emacs menu navigation ([#699](https://github.com/Gitlawb/zero/issues/699)) ([7f669f4](https://github.com/Gitlawb/zero/commit/7f669f455021be51319ee3b8298cd48a17f745c7))
-* **tui:** press up to edit queued messages ([#656](https://github.com/Gitlawb/zero/issues/656)) ([4c986d3](https://github.com/Gitlawb/zero/commit/4c986d327b5ed26338d295c23bea5839681db8d0))
-
-
-### Bug Fixes
-
-* **acp:** make truncateHint rune-safe ([#614](https://github.com/Gitlawb/zero/issues/614)) ([ddc4927](https://github.com/Gitlawb/zero/commit/ddc4927aac5544bf4dd2c46615aeda5a81c96576))
-* **agent,tui:** resolve git branch detection when starting Zero in subdirectories ([#613](https://github.com/Gitlawb/zero/issues/613)) ([0184581](https://github.com/Gitlawb/zero/commit/0184581ec234ea414e0a47bc33e8b0f4ddfb497b))
-* **agent:** raise default and deep-mode turn budgets ([#650](https://github.com/Gitlawb/zero/issues/650)) ([635c93a](https://github.com/Gitlawb/zero/commit/635c93af51ebc20f3e0917917e55a79edfe27c35))
-* **cli:** prevent consuming positional arguments as flag values ([#619](https://github.com/Gitlawb/zero/issues/619)) ([5b4f48d](https://github.com/Gitlawb/zero/commit/5b4f48d2dcb66402c13bde0c3cfe9c9371da19fb))
-* **config:** enforce MCP trust boundary so project config cannot override user disable ([#609](https://github.com/Gitlawb/zero/issues/609)) ([4d8c31c](https://github.com/Gitlawb/zero/commit/4d8c31cf16a3080344e3be7039408fcae71c075d)), closes [#512](https://github.com/Gitlawb/zero/issues/512)
-* **config:** surface unknown/typo'd config fields instead of silently dropping them ([#645](https://github.com/Gitlawb/zero/issues/645)) ([893b7b4](https://github.com/Gitlawb/zero/commit/893b7b424cc203a2fcf92327a4e25c84286a90e0))
-* **cron:** prevent cron job Mutate from clobbering concurrent updates ([#630](https://github.com/Gitlawb/zero/issues/630)) ([e4bd703](https://github.com/Gitlawb/zero/commit/e4bd703cfb28dab2dfa3c2ddba46237e1bb2e164))
-* **daemon:** handle os.ErrPermission as collision during O_EXCL lock creation ([#616](https://github.com/Gitlawb/zero/issues/616)) ([8ea5384](https://github.com/Gitlawb/zero/commit/8ea53841a5d54c37a153779ae86bea010659433c))
-* **exec:** stop false INCOMPLETE downgrades on conversational final messages ([#608](https://github.com/Gitlawb/zero/issues/608)) ([b6117af](https://github.com/Gitlawb/zero/commit/b6117af86d6bc87a4ee66910e99d76cb16b03fed))
-* harden MCP credential boundaries ([#597](https://github.com/Gitlawb/zero/issues/597)) ([fdddb05](https://github.com/Gitlawb/zero/commit/fdddb05ba84b1600ae6c3a20028bf83afe474c44))
-* **hooks:** fail closed on launch failures for beforeTool hooks ([#629](https://github.com/Gitlawb/zero/issues/629)) ([dc06fe7](https://github.com/Gitlawb/zero/commit/dc06fe72caf45f72d2cba1e8a835c0f5b405c1e8))
-* **hooks:** run sessionEnd hooks after Esc/Ctrl+C interrupts ([#606](https://github.com/Gitlawb/zero/issues/606)) ([824ecdb](https://github.com/Gitlawb/zero/commit/824ecdbcf9c467c35ef4e2666770fdadcb5bf402))
-* **keyring:** pass generic password via stdin on macOS ([#574](https://github.com/Gitlawb/zero/issues/574)) ([91ea6de](https://github.com/Gitlawb/zero/commit/91ea6ded7503538834a84d090f78670a363c62d3))
-* **lock:** prevent POSIX lock file overwrite and leak on Windows/Unix ([#628](https://github.com/Gitlawb/zero/issues/628)) ([da41c3a](https://github.com/Gitlawb/zero/commit/da41c3a75b782d6e0836fe13346321e40a90fbb4))
-* **openai:** omit prompt_cache_key for openai-compatible providers ([#636](https://github.com/Gitlawb/zero/issues/636)) ([1af5882](https://github.com/Gitlawb/zero/commit/1af58828eb3c22567599c000736c913a290959d2)), closes [#624](https://github.com/Gitlawb/zero/issues/624)
-* **plugins:** resolve relative executable paths against plugin root ([#627](https://github.com/Gitlawb/zero/issues/627)) ([2efe6d5](https://github.com/Gitlawb/zero/commit/2efe6d539e29374b3ef39c2290bdea81f33a228b))
-* **sandbox:** remove windowsWriteRestricted flag to fix DenyRead bypass ([#612](https://github.com/Gitlawb/zero/issues/612)) ([3d96ac7](https://github.com/Gitlawb/zero/commit/3d96ac7e55c760a97f28c0e6ceaf1ec3b4ab717a))
-* **sandbox:** scrub dynamic credential env vars ([#682](https://github.com/Gitlawb/zero/issues/682)) ([9043bae](https://github.com/Gitlawb/zero/commit/9043baedcff7776c7373645b57563cac06b31847))
-* **sandbox:** scrub sensitive credentials from sandbox environment ([#660](https://github.com/Gitlawb/zero/issues/660)) ([6fc1220](https://github.com/Gitlawb/zero/commit/6fc1220f6ac66fb3ae67b637cbbed7068d2213c0))
-* **sandbox:** unblock git fetch/commit/add under the write-restricted sandbox ([#654](https://github.com/Gitlawb/zero/issues/654)) ([5c4815a](https://github.com/Gitlawb/zero/commit/5c4815a66ed07d9cf90b825adfd936d3ac07639d))
-* **sandbox:** use WRITE_RESTRICTED token when no DenyRead paths are configured ([#658](https://github.com/Gitlawb/zero/issues/658)) ([a5d2e32](https://github.com/Gitlawb/zero/commit/a5d2e327c8681671aa8a9e5378801215b747edcf))
-* **securefile,credstore:** call Sync on temp file before close and rename ([#631](https://github.com/Gitlawb/zero/issues/631)) ([212734a](https://github.com/Gitlawb/zero/commit/212734adf3b5f982e22385161205aa1afe4634fe))
-* **securefile:** reclaim stale lock files to prevent permanent DOS ([#615](https://github.com/Gitlawb/zero/issues/615)) ([8536cc8](https://github.com/Gitlawb/zero/commit/8536cc87f7a885f9e436d6ef28f5f325201623dc))
-* **swarm:** wait for job.Runs directly in scheduler skip test ([#667](https://github.com/Gitlawb/zero/issues/667)) ([1bb6b57](https://github.com/Gitlawb/zero/commit/1bb6b5745af90321d1e657a12a1976cded5dd1bd))
-* **tools:** classify silent wrapped Windows command failures as sandbox denials ([#659](https://github.com/Gitlawb/zero/issues/659)) ([8bd9742](https://github.com/Gitlawb/zero/commit/8bd9742fa95c41b93ea4e718628aed0ff3ae9dd0))
-* **tools:** preserve SysProcAttr during PTY fallback ([#618](https://github.com/Gitlawb/zero/issues/618)) ([f78b36c](https://github.com/Gitlawb/zero/commit/f78b36c770daa4577a9f99265b18a354454e36eb))
-* **tui:** resolve pending askUser callbacks to prevent runner hangs ([#620](https://github.com/Gitlawb/zero/issues/620)) ([aa73a76](https://github.com/Gitlawb/zero/commit/aa73a76f1bd1b6fe97bac2fbff2d61b7474139f2))
-* **tui:** stop the composer cursor blinking while typing or unfocused ([#672](https://github.com/Gitlawb/zero/issues/672)) ([2b42cd5](https://github.com/Gitlawb/zero/commit/2b42cd567b96d6f7e0818594e53ff31cce1e42e9))
-* **windows:** resolve absolute path for taskkill to prevent hijacking ([#617](https://github.com/Gitlawb/zero/issues/617)) ([2db00ee](https://github.com/Gitlawb/zero/commit/2db00ee3d57db97e0fbe23cb8628e8bcb47f6f09))
-
-
-### Performance Improvements
-
-* **tools:** add explicit effect metadata for safe concurrency ([#705](https://github.com/Gitlawb/zero/issues/705)) ([8ef8576](https://github.com/Gitlawb/zero/commit/8ef8576df7d0775a5b815bc0776a794cadb75c34))
-
-## [0.3.0](https://github.com/Gitlawb/zero/compare/v0.2.0...v0.3.0) (2026-07-09)
-
-
-### Features
-
-* gate project-scoped hooks, plugins, and MCP servers behind workspace trust ([#529](https://github.com/Gitlawb/zero/issues/529)) ([a880ce8](https://github.com/Gitlawb/zero/commit/a880ce80a6ec72da511fb9bdf6dd69291c72a64b))
-* **modelregistry:** infer reasoning efforts for Hunyuan and vendor-prefixed model ids ([#599](https://github.com/Gitlawb/zero/issues/599)) ([92a92ce](https://github.com/Gitlawb/zero/commit/92a92ceb29dc63f5216ab140ef9a6dd9afe17df8))
-* **providers:** OAuth login profiles and list-first /provider manager ([#560](https://github.com/Gitlawb/zero/issues/560)) ([1655056](https://github.com/Gitlawb/zero/commit/16550569c1be615cfaf244dab25909ec37f6dee6))
-* **tui:** remember recent provider+model selections in /model picker ([#568](https://github.com/Gitlawb/zero/issues/568)) ([d0c4e62](https://github.com/Gitlawb/zero/commit/d0c4e62cd429a0614c15296934c740a08bc0e07b))
-* **tui:** show CLI version on the startup home screen ([#538](https://github.com/Gitlawb/zero/issues/538)) ([fd69233](https://github.com/Gitlawb/zero/commit/fd69233e334f1823a06b5794085a9255b3abdfa8))
-* voice dictation (speech-to-text) ([#557](https://github.com/Gitlawb/zero/issues/557)) ([87158a1](https://github.com/Gitlawb/zero/commit/87158a1c90b4f91fc5f2bb8178ebaf46d7654680))
-
-
-### Bug Fixes
-
-* address bugs found in a multi-agent codebase audit ([#481](https://github.com/Gitlawb/zero/issues/481)) ([008bc9b](https://github.com/Gitlawb/zero/commit/008bc9b3f3ba13c7d4822b9559b020f381ff555b))
-* **agent:** keep tools exposed for max-turn finalization ([#533](https://github.com/Gitlawb/zero/issues/533)) ([3f0503b](https://github.com/Gitlawb/zero/commit/3f0503bc2312ae29d5ade784d8824dc9a3524958))
-* **auth:** persist OpenRouter API key after login ([#595](https://github.com/Gitlawb/zero/issues/595)) ([2a062aa](https://github.com/Gitlawb/zero/commit/2a062aa4014c6cd5e20a57dad4a685f88966f109))
-* bump Go to 1.26.5 for crypto/tls fix (GO-2026-5856) ([#607](https://github.com/Gitlawb/zero/issues/607)) ([a7cfb99](https://github.com/Gitlawb/zero/commit/a7cfb99fed7b88ebc09a2f251cb82864d3c2cade))
-* gitignore Windows sandbox helpers and npm version marker ([#578](https://github.com/Gitlawb/zero/issues/578)) ([25653f6](https://github.com/Gitlawb/zero/commit/25653f686c016f95b81ceb7ff5d5452d37c4d4f3))
-* **mcp:** silence startup warning for unconfigured default servers ([#563](https://github.com/Gitlawb/zero/issues/563)) ([302f58b](https://github.com/Gitlawb/zero/commit/302f58bb5f2a03ec7230354ed4747e4e55c16c50))
-* **mcp:** skip RFC 8414 discovery when OAuth endpoints are preconfigured ([#586](https://github.com/Gitlawb/zero/issues/586)) ([8a52d98](https://github.com/Gitlawb/zero/commit/8a52d98cad7cd0086dee9aede4ce477e432bd385))
-* **modelregistry:** reject oversized models.dev cache responses ([#602](https://github.com/Gitlawb/zero/issues/602)) ([66a6396](https://github.com/Gitlawb/zero/commit/66a63964149fb2f07e646e5f1987627c5cd9ac28))
-* **provider:** stop dropping custom no-auth providers on restart ([#558](https://github.com/Gitlawb/zero/issues/558)) ([ba99fa8](https://github.com/Gitlawb/zero/commit/ba99fa8d487fb28f2700e0ff10b2a25c75303cf7))
-* **sandbox:** Windows-appropriate suggestions when blocking interactive commands ([#414](https://github.com/Gitlawb/zero/issues/414)) ([ba4c007](https://github.com/Gitlawb/zero/commit/ba4c00755dc1c31b3dcca18e50b20f62c6bf5d1f))
-* **tools:** block MSYS and WSL shells under the Windows sandbox ([#587](https://github.com/Gitlawb/zero/issues/587)) ([0666818](https://github.com/Gitlawb/zero/commit/066681855b80e3baf5d07d7397610b25f724e353))
-* **tools:** platform-specific pager suggestions, quote/caret-safe cd detection ([#543](https://github.com/Gitlawb/zero/issues/543)) ([8b248f4](https://github.com/Gitlawb/zero/commit/8b248f4e1198dc86ab332a697fba4cf520823cbd))
-* **tools:** Windows cmd.exe quoting guidance and clipboard escaping fix ([#468](https://github.com/Gitlawb/zero/issues/468)) ([f10ed0c](https://github.com/Gitlawb/zero/commit/f10ed0c893ce6de08923f143d681ba96f0fcfe3a))
-* **tui:** bypass toggleSidebar and toggleMouse global shortcuts when composer is non-empty ([#576](https://github.com/Gitlawb/zero/issues/576)) ([c7346fb](https://github.com/Gitlawb/zero/commit/c7346fbcf01fe7e70ed2fcfccbf9965e5985727b))
-* **tui:** paste protection for Termux char-by-char paste ([#573](https://github.com/Gitlawb/zero/issues/573)) ([8e9149f](https://github.com/Gitlawb/zero/commit/8e9149f1a296bebebf95cae9dd2a7c5156c9dbb6))
-* **tui:** update picker_test for switchProviderModel 4-value return ([#589](https://github.com/Gitlawb/zero/issues/589)) ([8f15650](https://github.com/Gitlawb/zero/commit/8f156506dc92449bd24caa14e36f28477ba00fff))
-* **update:** clearer error on unsupported release platform (android/termux) ([#603](https://github.com/Gitlawb/zero/issues/603)) ([1fc9b2d](https://github.com/Gitlawb/zero/commit/1fc9b2d25c79e089f34cb7b5b6a7f7c7b8233123))
-* **update:** support safe symlink extraction during updates ([#575](https://github.com/Gitlawb/zero/issues/575)) ([ce9cb91](https://github.com/Gitlawb/zero/commit/ce9cb912958a3d9ae0b052bfebb849c28e0e719b))
-* warn about untracked scratch files left behind after a run ([#571](https://github.com/Gitlawb/zero/issues/571)) ([062328b](https://github.com/Gitlawb/zero/commit/062328b632a2d27353a6d47c522bbd22d7282539))
-
-
-### Performance Improvements
-
-* **grep:** stop content scan after head limit ([#601](https://github.com/Gitlawb/zero/issues/601)) ([8a05e64](https://github.com/Gitlawb/zero/commit/8a05e6486f7a63281b869064db03dfc5531e6a04))
-
-## [0.2.0](https://github.com/Gitlawb/zero/compare/v0.1.0...v0.2.0) (2026-07-06)
-
-
-### Features
-
-* add --auto flag for LLM-generated commit messages ([#423](https://github.com/Gitlawb/zero/issues/423)) ([b0abde7](https://github.com/Gitlawb/zero/commit/b0abde7d0697e808480cd59d69a6f4d0c6320475))
-* add zero changes push and pr subcommands, and extra repo-info metrics ([#391](https://github.com/Gitlawb/zero/issues/391)) ([2312abe](https://github.com/Gitlawb/zero/commit/2312abe5ddd95f4c6ef373cfb61cc03092f48cdd))
-* agent quality, caching, retry, and tooling upgrades ([#506](https://github.com/Gitlawb/zero/issues/506)) ([3c81fea](https://github.com/Gitlawb/zero/commit/3c81fea22873ee3df7fc97b10cb4f77792706c4b))
-* **agent:** curb over-engineering the solution in the editing discipline ([#517](https://github.com/Gitlawb/zero/issues/517)) ([f4c998a](https://github.com/Gitlawb/zero/commit/f4c998ac30c4f07ff313a2d706791e857293be49)), closes [#516](https://github.com/Gitlawb/zero/issues/516)
-* **agent:** inject per-user config.UserConfigDir()/zero/ZERO.md guidelines into system prompt ([#475](https://github.com/Gitlawb/zero/issues/475)) ([7b10aab](https://github.com/Gitlawb/zero/commit/7b10aab74bf14a01166b2cea22deab79bba9850b))
-* **openai:** forward prompt_cache_key for server-side prefix cache routing ([#515](https://github.com/Gitlawb/zero/issues/515)) ([87e7e69](https://github.com/Gitlawb/zero/commit/87e7e69afd18b5539579856f3a61c6a95bc445ae))
-* **providers:** add `zero providers models` to discover a provider's models ([#386](https://github.com/Gitlawb/zero/issues/386)) ([0bc8074](https://github.com/Gitlawb/zero/commit/0bc8074c97b0310e4a9d70c3f967003ee5e8a59f))
-* **providers:** add KiloCode and OpenCode provider support ([#388](https://github.com/Gitlawb/zero/issues/388)) ([b1ccb6d](https://github.com/Gitlawb/zero/commit/b1ccb6d9c1875377f5e5ea81a1304edd1e41ab4f))
-* **providers:** add Meituan LongCat catalog preset ([#424](https://github.com/Gitlawb/zero/issues/424)) ([b4275e3](https://github.com/Gitlawb/zero/commit/b4275e350472b2490212bf814709819d354c1216))
-* **providers:** split minimax zai into intl cn ([#398](https://github.com/Gitlawb/zero/issues/398)) ([aaad4d2](https://github.com/Gitlawb/zero/commit/aaad4d271270f41af837b6f3b60ae80beba0c645))
-* require manual approval before npm publish + drop release-as pin ([#369](https://github.com/Gitlawb/zero/issues/369)) ([bd89a1f](https://github.com/Gitlawb/zero/commit/bd89a1f451643c1b65ec803070abc7b116631ebe))
-* **sandbox:** unelevated Windows fallback tier instead of prompts-only degrade ([#427](https://github.com/Gitlawb/zero/issues/427)) ([b9ddd6f](https://github.com/Gitlawb/zero/commit/b9ddd6f42138312a1fee8d8bb67c46c8eb1dea2f))
-* support shift enter for composer newlines ([#462](https://github.com/Gitlawb/zero/issues/462)) ([daf65e0](https://github.com/Gitlawb/zero/commit/daf65e0af9a040314d4ab337b0ad59c55416b7bc))
-* **tui:** /loop — repeat a prompt or command on an interval or self-paced ([#502](https://github.com/Gitlawb/zero/issues/502)) ([387fe67](https://github.com/Gitlawb/zero/commit/387fe67ee7cd81317c9c969f5906a4437080fea3))
-* **tui:** add search/filter to provider picker in setup wizard ([#400](https://github.com/Gitlawb/zero/issues/400)) ([2fcea71](https://github.com/Gitlawb/zero/commit/2fcea71778d23e050c93409c471aef45b68c1621))
-* **update:** add zero upgrade command to apply self-updates ([#461](https://github.com/Gitlawb/zero/issues/461)) ([5f36349](https://github.com/Gitlawb/zero/commit/5f36349c1884e81fa9bc66bb5fe813b627e897b7))
-
-
-### Bug Fixes
-
-* **action:** keep provider key scoped to zero step ([#448](https://github.com/Gitlawb/zero/issues/448)) ([407a927](https://github.com/Gitlawb/zero/commit/407a92739ff508cba32d2c12b3f36f0efcdd54c3))
-* add android platform support for Termux npm install ([#455](https://github.com/Gitlawb/zero/issues/455)) ([9bd93c6](https://github.com/Gitlawb/zero/commit/9bd93c62f8d57fb74057284aa66a1b6e1429dcdd)), closes [#449](https://github.com/Gitlawb/zero/issues/449)
-* **agent:** reject a malformed additional_permissions payload before prompting ([#453](https://github.com/Gitlawb/zero/issues/453)) ([e4f760e](https://github.com/Gitlawb/zero/commit/e4f760ee8bd57299cd2fcb37e8e23130037c2607))
-* allow non-TLS connections to private-network provider endpoints ([#444](https://github.com/Gitlawb/zero/issues/444)) ([1d86384](https://github.com/Gitlawb/zero/commit/1d8638466ca31517eb9db2b9353d3dce1cbeeabc))
-* **auth:** route zero auth login chatgpt to the dedicated ChatGPT flow ([#443](https://github.com/Gitlawb/zero/issues/443)) ([305a62c](https://github.com/Gitlawb/zero/commit/305a62c954ca6cec00bc58d5398f933415156aff))
-* **config:** fall back to a usable saved provider instead of forcing full re-onboarding ([#410](https://github.com/Gitlawb/zero/issues/410)) ([c60ad87](https://github.com/Gitlawb/zero/commit/c60ad8729f79bb841114d352ee2d2fe29d5d0e41))
-* **config:** let a gateway ANTHROPIC_BASE_URL resolve as anthropic-compatible ([#497](https://github.com/Gitlawb/zero/issues/497)) ([30dd7c3](https://github.com/Gitlawb/zero/commit/30dd7c3112ad22d42fa12b5addd4e38f4beda42a)), closes [#479](https://github.com/Gitlawb/zero/issues/479)
-* **config:** unbrick first-run setup — default google/anthropic models, enter setup on fixable config errors ([#385](https://github.com/Gitlawb/zero/issues/385)) ([72eed06](https://github.com/Gitlawb/zero/commit/72eed06b4f94c43d75d31fe54a58d2f566de059e))
-* **config:** use ~/.config on macOS and enter setup when no provider ([#371](https://github.com/Gitlawb/zero/issues/371)) ([#372](https://github.com/Gitlawb/zero/issues/372)) ([027a8f2](https://github.com/Gitlawb/zero/commit/027a8f2768b17b89f5c8270887f156e2ccda69ea))
-* **docs:** rename AGENTS.MD > AGENTS.md ([#438](https://github.com/Gitlawb/zero/issues/438)) ([4266baf](https://github.com/Gitlawb/zero/commit/4266baf222df583ed2078b776687f12d496475b5))
-* **gemini:** strip unsupported JSON Schema fields from tool declarations ([#374](https://github.com/Gitlawb/zero/issues/374)) ([39e7100](https://github.com/Gitlawb/zero/commit/39e7100674150144a1152e3110c64c7cf0321d64)), closes [#373](https://github.com/Gitlawb/zero/issues/373)
-* **install:** persist install dir to user PATH on Windows ([#407](https://github.com/Gitlawb/zero/issues/407)) ([bdb1b0e](https://github.com/Gitlawb/zero/commit/bdb1b0ecd15859b1712a6037d296dace7f9c3c3f))
-* **mcp:** block cross-origin credential redirects ([#396](https://github.com/Gitlawb/zero/issues/396)) ([f915f70](https://github.com/Gitlawb/zero/commit/f915f70e5a3096e2419fa8d961a0f84a626fa4a9))
-* **oauth:** treat Windows ERROR_ACCESS_DENIED as lock contention in createSecretFile ([#445](https://github.com/Gitlawb/zero/issues/445)) ([d05e914](https://github.com/Gitlawb/zero/commit/d05e9148a7f79f67d1d3c31fca2775f21fbd331e))
-* **openai:** handle Ollama reasoning stream deltas ([#486](https://github.com/Gitlawb/zero/issues/486)) ([f6c0606](https://github.com/Gitlawb/zero/commit/f6c060631e18e082dda24cc4dc0903c31c2120d6))
-* preserve conversation context in exec prompts ([#460](https://github.com/Gitlawb/zero/issues/460)) ([949ee43](https://github.com/Gitlawb/zero/commit/949ee43f71e5cb7fab4695c5cb7b442fe4ecfbf7))
-* **provider-wizard:** allow multiple custom OpenAI-compatible providers ([#403](https://github.com/Gitlawb/zero/issues/403)) ([3fbbd28](https://github.com/Gitlawb/zero/commit/3fbbd28e4c586822cc4312c86232d94befe56e87))
-* **sandbox:** fix nested pipe creation under the Windows restricted token ([#456](https://github.com/Gitlawb/zero/issues/456)) ([563a6db](https://github.com/Gitlawb/zero/commit/563a6dbe91e65d5daeefd7626e8a77e30a6d8fb2))
-* **sandbox:** gate /tmp test assertions on GOOS, not path existence ([#426](https://github.com/Gitlawb/zero/issues/426)) ([f653dca](https://github.com/Gitlawb/zero/commit/f653dcac363fb69ad7be5b35e6e0fa6d2bce476d))
-* **sandbox:** self-heal a corrupt unelevated setup marker ([#437](https://github.com/Gitlawb/zero/issues/437)) ([8d0c5fe](https://github.com/Gitlawb/zero/commit/8d0c5feccb8bdbfb015df0508aa6e3bcbd1fd0e8))
-* **specialist:** cap max specialist nesting depth ([#491](https://github.com/Gitlawb/zero/issues/491)) ([177442c](https://github.com/Gitlawb/zero/commit/177442cfe4015bd8df04cc9894f98b468ee796d4))
-* Termux/Android support — PRoot scroll, SIGSYS sandbox, build docs ([#509](https://github.com/Gitlawb/zero/issues/509)) ([0f69d99](https://github.com/Gitlawb/zero/commit/0f69d995e9b586b774f66c066b21abab5e03024a))
-* **tools:** Block MSYS coreutils under Windows sandbox ([#476](https://github.com/Gitlawb/zero/issues/476)) ([81aad58](https://github.com/Gitlawb/zero/commit/81aad58d97839e51c068e2f08907618991fdc3fb))
-* **tools:** CRLF line ending mismatch in edit_file tool on Windows ([#378](https://github.com/Gitlawb/zero/issues/378)) ([33dc7ae](https://github.com/Gitlawb/zero/commit/33dc7ae2cc82c5389675531e1416856dae7151ce))
-* **tools:** fix cmd.exe /S/C corrupting commands with embedded quotes ([#465](https://github.com/Gitlawb/zero/issues/465)) ([190241b](https://github.com/Gitlawb/zero/commit/190241bd593f43211b766e0b13c8e89802d4bb37))
-* **tools:** flag piped POSIX utilities before running on Windows ([#412](https://github.com/Gitlawb/zero/issues/412)) ([5658a36](https://github.com/Gitlawb/zero/commit/5658a366274fc59a9d5336b06a21019c9c25cbf1))
-* **tools:** make grep and glob respect run cancellation ([#464](https://github.com/Gitlawb/zero/issues/464)) ([ba6c026](https://github.com/Gitlawb/zero/commit/ba6c0264697b7d7ed479f6e782fba9700a481e3d))
-* **tools:** require permission before web_search requests ([#382](https://github.com/Gitlawb/zero/issues/382)) ([960db96](https://github.com/Gitlawb/zero/commit/960db9660e4e31dc588fe8f7d6f116ff5e225566))
-* **tui:** compose help overlay through the viewport overlay pipeline ([#421](https://github.com/Gitlawb/zero/issues/421)) ([5b2b4de](https://github.com/Gitlawb/zero/commit/5b2b4dea1aaf9e0f68baa25e97e83296fb17b1a2))
-* **tui:** keep the profile name on /model switch so the stored key resolves ([#441](https://github.com/Gitlawb/zero/issues/441)) ([9134148](https://github.com/Gitlawb/zero/commit/9134148f4df3e4e556fba6c2f8babfdf6fcfeee1)), closes [#440](https://github.com/Gitlawb/zero/issues/440)
-* **tui:** resolve every permission request so the agent can't deadlock ([#397](https://github.com/Gitlawb/zero/issues/397)) ([952788f](https://github.com/Gitlawb/zero/commit/952788f72d32957659fe004521fcc8372b9ba9b4))
-* **tui:** show an M suffix for million-scale token counts ([#457](https://github.com/Gitlawb/zero/issues/457)) ([0562e3b](https://github.com/Gitlawb/zero/commit/0562e3bef7df2328610a48a1e81632a8da4aec64))
-* **tui:** title /model rows by model name, not the catalog description ([#395](https://github.com/Gitlawb/zero/issues/395)) ([cdf9d83](https://github.com/Gitlawb/zero/commit/cdf9d839ae57a729f292f36f7c5b0c67b41b288d))
-
-
-### Performance Improvements
-
-* cache TUI model registry ([#496](https://github.com/Gitlawb/zero/issues/496)) ([e7d88b4](https://github.com/Gitlawb/zero/commit/e7d88b4b518049733da25a8447c00144bd1da518))
-* universal tool-output ceiling with spill + async post-edit diagnostics ([#518](https://github.com/Gitlawb/zero/issues/518)) ([95ccd5b](https://github.com/Gitlawb/zero/commit/95ccd5bc327f6fb464ff0239f7229de789f578dc))
-
-## 0.1.0 (2026-07-02)
-
-
-### Features
-
-* publish zero to npm via release-please ([#367](https://github.com/Gitlawb/zero/issues/367)) ([8eccc26](https://github.com/Gitlawb/zero/commit/8eccc2669887bc38d35bc16a315c888e4d9ec43a))
-* **tui:** FILES sidebar panel with click-to-select and file drill-in ([#365](https://github.com/Gitlawb/zero/issues/365)) ([142c548](https://github.com/Gitlawb/zero/commit/142c548c89a8652ce300e64ddf1228ee36df7606))
-
-
-### Bug Fixes
-
-* **auth:** propagate credentials to every provider-build surface and pin children to the live provider ([#366](https://github.com/Gitlawb/zero/issues/366)) ([6e0a665](https://github.com/Gitlawb/zero/commit/6e0a665118fe0e09c4b07d482dd18f86045acd2b))
-
-## [Unreleased]
-
-### Added
-- Shared multi-agent skills discovery: when present, `~/.agents/skills` is searched after the primary
-  Zero skills dir (and before plugin skill roots). `zero skills list` / `info` and the runtime `skill`
-  tool share one multi-root discovery path; install/remove/lock still target only the Zero skills directory.
-- `SECURITY.md` with a private vulnerability-reporting path, `CODE_OF_CONDUCT.md`, this changelog, and
-  GitHub issue/PR templates.
-- Interactive `/theme` picker: bare `/theme` opens a popup that live-previews each palette as you move
-  and applies on select (Esc reverts).
-- Twelve built-in color themes alongside the `dark`/`light` built-ins — `dracula`, `nord`, `gruvbox`,
-  `tokyo-night`, `catppuccin`, `one-dark`, `solarized-dark`, `rose-pine`, `everforest`,
-  `solarized-light`, `dune`, and `neon` — selectable via `/theme <name>`, `--theme <name>`, or
-  `ZERO_THEME`. Every palette is contrast-audited to WCAG AA, and the new presets are additionally
-  audited after xterm-256 downsampling; see [docs/THEMES.md](docs/THEMES.md). The built-in light
-  theme was reworked for legibility.
-- `--theme <name>` flag for the TUI, accepting `auto` or any registered theme (previously only the
-  `ZERO_THEME` env var existed).
-- "Accessibility / Appearance" section in the README documenting `NO_COLOR`, `ZERO_THEME`, `/theme`,
-  and `ZERO_NO_FADE`.
-
-### Changed
-- Provider connectivity health checks now allow loopback hosts for explicitly user-configured local
-  providers (Ollama / LM Studio), so the keyless local-model path verifies instead of failing with
-  "localhost hosts are blocked". The SSRF guard for fetched/remote URLs is unchanged.
-- Auth (401/403) errors now show a curated, actionable message pointing at `zero auth` / setup; the
-  raw upstream body is shown only under a verbose/debug flag.
-- No-provider / missing-key errors now point at `zero setup` and `zero auth`, and distinguish a
-  missing key from a rejected key.
-- `zero doctor` no longer reports "Overall: pass" when no provider credential is configured, and
-  formats the missing-language-server list for humans (no raw Go `map[...]`).
-- Raised the `faint`/`faintest` theme tokens (and the light-theme accent) to meet WCAG AA contrast for
-  the content they carry.
-- `NO_COLOR` is now honored for any non-empty value, per the no-color.org spec.
-
-### Removed
-- The inert `/input-style` slash command (it had no backend).
-
-### Fixed
-- README/`go.mod` Go-version mismatch and other stale public-release docs claims.

CODE_OF_CONDUCT.md

@@ -1,58 +0,0 @@
-# Contributor Covenant Code of Conduct
-
-## Our Pledge
-
-We as members, contributors, and leaders pledge to make participation in our community a
-harassment-free experience for everyone, regardless of age, body size, visible or invisible
-disability, ethnicity, sex characteristics, gender identity and expression, level of experience,
-education, socio-economic status, nationality, personal appearance, race, religion, or sexual
-identity and orientation.
-
-We pledge to act and interact in ways that contribute to an open, welcoming, diverse, inclusive, and
-healthy community.
-
-## Our Standards
-
-Examples of behavior that contributes to a positive environment:
-
-- Demonstrating empathy and kindness toward other people.
-- Being respectful of differing opinions, viewpoints, and experiences.
-- Giving and gracefully accepting constructive feedback.
-- Accepting responsibility and apologizing to those affected by our mistakes.
-- Focusing on what is best for the overall community.
-
-Examples of unacceptable behavior:
-
-- The use of sexualized language or imagery, and sexual attention or advances of any kind.
-- Trolling, insulting or derogatory comments, and personal or political attacks.
-- Public or private harassment.
-- Publishing others' private information, such as a physical or email address, without their
-  explicit permission.
-- Other conduct which could reasonably be considered inappropriate in a professional setting.
-
-## Enforcement Responsibilities
-
-Project maintainers are responsible for clarifying and enforcing our standards of acceptable behavior
-and will take appropriate and fair corrective action in response to any behavior that they deem
-inappropriate, threatening, offensive, or harmful.
-
-## Scope
-
-This Code of Conduct applies within all community spaces, and also applies when an individual is
-officially representing the community in public spaces.
-
-## Enforcement
-
-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported privately to the
-project maintainers through the repository's **Security → Report a vulnerability** channel (which
-delivers a confidential report to maintainers), or by contacting a maintainer directly. All
-complaints will be reviewed and investigated promptly and fairly.
-
-Maintainers are obligated to respect the privacy and security of the reporter of any incident.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 2.1, available at
-<https://www.contributor-covenant.org/version/2/1/code_of_conduct.html>.
-
-[homepage]: https://www.contributor-covenant.org

CONTRIBUTING.md

@@ -8,13 +8,6 @@ stabilizes. Community participation is still welcome, especially through bug
 reports, feature requests, reproduction details, logs, and discussion on existing
 issues.
 
-Questions and setup help belong in
-[GitHub Discussions](https://github.com/Twigpine/zero/discussions) (see
-[SUPPORT.md](SUPPORT.md)), not in the issue tracker. Feature ideas start in the
-[Ideas](https://github.com/Twigpine/zero/discussions/categories/ideas) category;
-an idea that gains traction there is the path to an approved issue and,
-eventually, an accepted PR.
-
 Please read this policy before opening a pull request. Pull requests that do not
 follow it may be closed without review.
 
@@ -40,11 +33,7 @@ unless the issue has been explicitly approved for outside contribution.
 There are three primary ways to contribute:
 
 1. Open a bug report with clear reproduction steps.
-2. Propose a feature in
-   [Discussions Ideas](https://github.com/Twigpine/zero/discussions/categories/ideas),
-   describing the problem, use case, and expected behavior. A feature-request
-   issue is filed only after the idea gains traction there or a maintainer asks
-   for one.
+2. Open a feature request describing the problem, use case, and expected behavior.
 3. Add useful context to an existing issue, such as logs, screenshots, examples,
    affected versions, or reproduction cases.
 
@@ -57,8 +46,7 @@ All community pull requests require an approved parent issue.
 
 Before starting implementation work:
 
-1. For a bug, open an issue using the bug-report template. For a feature, start
-   in Discussions Ideas; the feature-request issue comes after the discussion.
+1. Open an issue using the appropriate issue template.
 2. Describe the bug, feature request, or functional change clearly.
 3. Wait for the core team to review the issue.
 4. Do not open a pull request unless the issue has the `issue-approved` label.
@@ -67,28 +55,6 @@ An approved issue means only that the specific issue has been accepted for work.
 It does not approve unrelated future work, future pull requests, or future issues
 from the same author. Each issue is reviewed case by case.
 
-## Contribution Volume and Batching
-
-To keep triage and review sustainable while the project stabilizes, please keep
-your contribution flow to a size the core team can realistically work through:
-
-- One issue per bug. File each defect as its own issue with its own
-  reproduction. Please do not bundle several unrelated findings into a single
-  "audit" issue; separate issues are far easier to triage, approve, and close
-  individually.
-- Keep only a few items open at a time. If you already have several issues or
-  pull requests awaiting review, let those move through the queue before opening
-  more. A large simultaneous burst from one contributor slows review for
-  everyone, even when each item is valid.
-- AI-assisted contributions are welcome, held to the same bar. Automated audits
-  and generated patches are fine, but each issue and pull request must be
-  individually verified, scoped, and reproducible before you open it. Please do
-  not post bulk machine-generated findings unfiltered.
-
-These apply to all contributors and are about review bandwidth, not the value of
-any single report. Maintainers may ask you to consolidate, split, or hold
-submissions to keep the queue manageable.
-
 ## Pull Request Requirements
 
 Before opening a community pull request, make sure all of the following are true:
@@ -126,31 +92,6 @@ not enough. Dependency changes need a clear project benefit, such as fixing a
 specific bug, addressing a security issue, improving compatibility, or supporting
 an approved feature.
 
-## Supported platforms
-
-Zero publishes five native prebuilt artifacts from
-`.github/workflows/release-artifacts.yml`:
-
-- `linux-x64` (`linux/amd64`)
-- `linux-arm64` (`linux/arm64`)
-- `macos-arm64` (`darwin/arm64`)
-- `macos-x64` (`darwin/amd64`)
-- `windows-x64` (`windows/amd64`)
-
-The shell installer and npm wrapper resolve the applicable artifacts from that
-list. The PowerShell installer supports the published `windows-x64` artifact;
-there is no native Windows ARM64 artifact. Windows on ARM users can run the x64
-build under emulation or build from source.
-
-Android/Termux is also supported even though it has no distinct release
-artifact. The npm wrapper maps Android to the Linux artifact, and
-`docs/INSTALL.md` documents the native `android/arm64` source build needed on
-devices whose seccomp policy blocks the Linux build's syscall path.
-
-Other `GOOS`/`GOARCH` values, including Plan 9, are unsupported. They are not a
-review criterion. Do not block a pull request for failing to compile on an
-unsupported target. Tests may use `plan9` as a fixture for an unsupported OS.
-
 ## What We Prioritize
 
 The core team will prioritize:
@@ -192,12 +133,7 @@ Clear bug reports are the most useful way to help the project during this phase.
 
 ## Submitting a Feature Request
 
-Feature requests start as a thread in
-[Discussions Ideas](https://github.com/Twigpine/zero/discussions/categories/ideas),
-not as an issue. The feature-request issue form exists for the step AFTER that:
-when an idea has gained traction in Discussions or a maintainer has asked for an
-issue to track it. Whether in the discussion or the eventual issue, please
-include:
+When filing a feature request, please include:
 
 - The problem you are trying to solve.
 - The behavior or functionality you are requesting.
@@ -220,9 +156,5 @@ contribution phase.
 
 ## Getting Help
 
-General questions, setup help, and "is this a bug or my config" uncertainty all
-go to
-[Discussions Q&A](https://github.com/Twigpine/zero/discussions/categories/q-a).
-If you are unsure whether a proposed code change is appropriate, raise it in
-Discussions Ideas or on the relevant issue first and ask. Please keep discussion
-focused, specific, and respectful of maintainer time.
+If you are unsure whether a change is appropriate, open an issue first and ask.
+Please keep discussion focused, specific, and respectful of maintainer time.

LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2026 Gitlawb
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

Makefile

@@ -1,86 +0,0 @@
-# Zero build/test/lint targets. AGENTS.md says to build and run quality checks
-# with `make` — these targets back those instructions.
-.DEFAULT_GOAL := build
-GO_VERSION = $(word 2,$(shell git grep -G -h "^go[[:space:]]" -- go.mod))
-GO_TOOLCHAIN = go$(GO_VERSION)
-DEADCODE_VERSION := v0.46.0
-GOLANGCI_LINT_VERSION := v2.12.2
-GOVULNCHECK_VERSION := v1.3.0
-
-.PHONY: build build-all test test-race vet fmt fmt-check lint lint-static deadcode vulncheck vulncheck-windows tidy clean baseline help
-
-# Build the main CLI binary into ./zero.
-build:
-	go build -o zero ./cmd/zero
-
-# Build every command in cmd/.
-build-all:
-	go build ./...
-
-# Run the full test suite with the race detector (matches CI expectations).
-test:
-	go test ./... -race -count=1
-
-# Faster, no race detector.
-test-quick:
-	go test ./...
-
-vet:
-	go vet ./...
-
-fmt:
-	gofmt -w $(shell git ls-files '*.go')
-
-# Fail if any tracked Go file is not gofmt-clean.
-fmt-check:
-	@out="$$(gofmt -l $$(git ls-files '*.go'))"; \
-	if [ -n "$$out" ]; then echo "gofmt needed:"; echo "$$out"; exit 1; fi
-
-# Lint = formatting check + vet (no extra tooling required).
-lint: fmt-check vet
-
-# Versioned tools select the toolchain from their own modules when invoked with
-# package@version. Read this module's go directive directly, without invoking
-# the possibly stale Go toolchain or consulting a multi-module GOWORK. git grep
-# works with both POSIX shells and cmd.exe, including GNU Make 3.81 on macOS.
-# The target-specific export is shell-independent.
-lint-static deadcode vulncheck vulncheck-windows: export GOTOOLCHAIN = $(GO_TOOLCHAIN)
-lint-static deadcode vulncheck vulncheck-windows: export GOWORK = off
-
-lint-static:
-	go run github.com/golangci/golangci-lint/v2/cmd/golangci-lint@$(GOLANGCI_LINT_VERSION) run --enable-only unused,ineffassign,staticcheck ./...
-
-deadcode:
-	go run golang.org/x/tools/cmd/deadcode@$(DEADCODE_VERSION) -test=false ./...
-
-vulncheck:
-	go run golang.org/x/vuln/cmd/govulncheck@$(GOVULNCHECK_VERSION) ./...
-
-vulncheck-windows:
-	mkdir -p "$(CURDIR)/.cache/gobin"
-	GOBIN="$(CURDIR)/.cache/gobin" go install golang.org/x/vuln/cmd/govulncheck@$(GOVULNCHECK_VERSION)
-	GOOS=windows "$(CURDIR)/.cache/gobin/govulncheck" ./...
-
-tidy:
-	go mod tidy
-
-clean:
-	rm -f zero
-	go clean ./...
-
-# Run the per-turn benchmark harness over the checked-in baseline manifest and
-# write the JSON result to internal/perfbench/reports/baseline.json. Requires a
-# built `zero` binary and a model; set ZERO_BENCH_MODEL (required) and
-# ZERO_BENCH_BINARY (defaults to ./zero) to configure the run. The report is
-# machine-specific and regenerated, not hand-edited.
-baseline: build
-	@if [ -z "$(ZERO_BENCH_MODEL)" ]; then echo "Set ZERO_BENCH_MODEL (and optionally ZERO_BENCH_BINARY) before running 'make baseline'"; exit 2; fi
-	@ZERO_BIN="$${ZERO_BENCH_BINARY:-./zero}"; \
-	go run ./cmd/zero-perf-bench turn \
-		--suite internal/perfbench/manifests/baseline.json \
-		--model $(ZERO_BENCH_MODEL) \
-		--binary "$$ZERO_BIN" \
-		--output internal/perfbench/reports/baseline.json
-
-help:
-	@echo "Targets: build (default), build-all, test, test-quick, vet, fmt, fmt-check, lint, lint-static, deadcode, vulncheck, vulncheck-windows, tidy, clean, baseline"

README.md

@@ -1,565 +1,217 @@
-<p align="center">
-  <img src="docs/assets/zero-logo.png" alt="Zero" width="385">
-</p>
+```
+ ███████████ ██████████ ███████████      ███████
+▒█▒▒▒▒▒▒███ ▒▒███▒▒▒▒▒█▒▒███▒▒▒▒▒███   ███▒▒▒▒▒███
+▒     ███▒   ▒███  █ ▒  ▒███    ▒███  ███     ▒▒███
+     ███     ▒██████    ▒██████████  ▒███      ▒███
+    ███      ▒███▒▒█    ▒███▒▒▒▒▒███ ▒███      ▒███
+  ████     █ ▒███ ▒   █ ▒███    ▒███ ▒▒███     ███
+ ███████████ ██████████ █████   █████ ▒▒▒███████▒
+▒▒▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒▒▒▒▒▒ ▒▒▒▒▒   ▒▒▒▒▒    ▒▒▒▒▒▒▒
+```
 
-<p align="center"><strong>A terminal coding agent you own.</strong></p>
+# Zero
 
-<p align="center">
-  <a href="https://trendshift.io/repositories/70679?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-70679" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/70679/daily?language=Go" alt="Twigpine/zero | Trendshift" width="250" height="55"/></a>
-  <a href="https://trendshift.io/repositories/70679?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-70679" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/70679/weekly?language=Go" alt="Twigpine/zero | Trendshift" width="250" height="55"/></a>
-  <a href="https://trendshift.io/repositories/70679?utm_source=repository-badge&amp;utm_medium=badge&amp;utm_campaign=badge-repository-70679" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/repositories/70679" alt="Twigpine/zero | Trendshift" width="250" height="55"/></a>
-</p>
+**A clean, terminal-first AI coding agent you fully own — multi-provider, scriptable, and safe by default.**
 
-<p align="center">
-  <a href="LICENSE"><img alt="license" src="https://img.shields.io/badge/license-MIT-blue"></a>
-  <img alt="Go 1.26.9+" src="https://img.shields.io/badge/Go-1.26.9+-00ADD8?logo=go&logoColor=white">
-  <img alt="25+ providers" src="https://img.shields.io/badge/providers-25+-34E2EA">
-  <a href="https://discord.gg/CaQDS6wdFn"><img alt="Discord" src="https://img.shields.io/badge/Discord-join-5865F2?logo=discord&logoColor=white"></a>
-  <br>
-  <strong>English</strong> | <a href="README_ZH.md">中文</a>
-</p>
+![core](https://img.shields.io/badge/core-Go--native-00ADD8?logo=go&logoColor=white)
+![distribution](https://img.shields.io/badge/distribution-npm%20wrapper-cb3837?logo=npm&logoColor=white)
+![transition](https://img.shields.io/badge/Go%20runtime-default-14151a?logo=go&logoColor=white)
+![status](https://img.shields.io/badge/status-active%20development-67e8f9)
 
-Zero is an AI coding agent for your local terminal. It can inspect a repository,
-edit files, run commands, use browser/terminal helpers, and keep durable local
-sessions while you choose the model and the permission level.
+Zero is a coding agent that lives in your terminal. It runs an agentic tool loop —
+reading, editing, searching, and running commands in your repo — against **whatever
+model you choose**. Zero has a **Go-native core** with an npm distribution wrapper;
+the Go runtime is the default app path.
+
+> Zero treats the **model as a swappable, per-task choice** — no single-vendor lock-in —
+> and never mutates your system without a permission decision.
+
+---
+
+## Highlights
+
+- 🔌 **Multi-provider** — OpenAI-compatible, Anthropic, and Gemini behind one interface, with a model registry (capabilities, context limits, cost). Bring your own key and endpoint.
+- 🖥️ **Premium TUI** — Bubble Tea/Lip Gloss powers the Go-native terminal interface.
+- 🤖 **Headless & scriptable** — `zero exec` with clean `text` / `json` / `stream-json` I/O and meaningful exit codes for CI and automation.
+- 🧰 **Real tools** — read / write / edit files, `apply_patch`, `grep`, `glob`, `bash`, directory listing, and a live plan/todo.
+- 🛡️ **Safe by default** — mutating tools are permission-gated; `--skip-permissions-unsafe` is an explicit, clearly-labeled opt-out.
+- 💾 **Durable sessions** — local, append-only session event store with full-text `search`.
+- 🩺 **Operable** — built-in `doctor`, `config` inspection, secret redaction everywhere, and `update --check`.
+
+## Quick start
+
+> Requires [Go](https://go.dev/) for local development and release tooling.
+> The npm wrapper uses Node when Zero is installed as an npm package.
 
 ```bash
-zero
-zero exec "fix the failing test in ./pkg"
-zero exec --output-format stream-json < turns.jsonl
+go run ./cmd/zero    # launch the interactive TUI
 ```
 
-## Partners
-
-<table align="center">
-  <tr>
-    <td align="center" width="150" height="80">
-      <a href="https://twigpine.com">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="https://twigpine.com/logo-dark.png">
-          <img src="https://twigpine.com/logo.png" alt="Twigpine logo" width="72">
-        </picture>
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://mimo.mi.com">
-        <img src="https://mimo.xiaomi.com/mimo-v2-pro/assets/logo.svg" alt="Xiaomi MiMo logo" width="136">
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://novita.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/novita-logo-dark.svg">
-          <img src="docs/assets/novita-logo.svg" alt="Novita AI logo" width="136">
-        </picture>
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://concentrate.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/concentrate-logo-dark.svg">
-          <img src="docs/assets/concentrate-logo.svg" alt="Concentrate logo" width="64">
-        </picture>
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://exa.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/exa-logo-dark.svg">
-          <img src="docs/assets/exa-logo.svg" alt="Exa logo" width="110">
-        </picture>
-      </a>
-    </td>
-  </tr>
-  <tr>
-    <td align="center"><a href="https://twigpine.com"><strong>Twigpine</strong></a></td>
-    <td align="center"><a href="https://mimo.mi.com"><strong>Xiaomi MiMo</strong></a></td>
-    <td align="center"><a href="https://novita.ai/"><strong>Novita AI</strong></a></td>
-    <td align="center"><a href="https://concentrate.ai/"><strong>Concentrate</strong></a></td>
-    <td align="center"><a href="https://exa.ai/"><strong>Exa</strong></a></td>
-  </tr>
-  <tr>
-    <td align="center" width="150" height="80">
-      <a href="https://www.gmicloud.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/gmi-cloud-logo-dark.svg">
-          <img src="docs/assets/gmi-cloud-logo.svg" alt="GMI Cloud logo" width="120">
-        </picture>
-      </a>
-    </td>
-  </tr>
-  <tr>
-    <td align="center"><a href="https://www.gmicloud.ai/"><strong>GMI Cloud</strong></a></td>
-  </tr>
-</table>
-
-## Why Zero
-
-- **Use the model you want.** Bring OpenAI, Anthropic, Gemini, Groq, OpenRouter,
-  DeepSeek, Mistral, xAI, Qwen, Kimi, GitHub Models, Ollama, LM Studio, Atomic Chat, or any
-  OpenAI-/Anthropic-compatible endpoint.
-- **Stay in control.** File writes, shell commands, network access, and
-  out-of-workspace writes go through Zero's permission and sandbox policy.
-- **Works in the terminal.** The TUI has model/provider pickers, image input,
-  slash commands, live plan/tool rendering, scrollback, themes, and resume/fork
-  support.
-- **Works without the TUI.** `zero exec` is scriptable, supports text/JSON/
-  stream-JSON I/O, isolated worktrees, spec-first runs, and meaningful exit
-  codes for CI.
-- **Keeps context local.** Sessions are stored on disk, searchable, resumable,
-  and never uploaded as telemetry by Zero.
-- **Extensible when you need it.** Use MCP servers, skills, plugins, hooks, and
-  specialist subagents from the same CLI.
-
-## Install
-
-### npm
-
-```bash
-npm install -g @twigpine/zero
-zero
-```
-
-The npm package is a small wrapper whose platform build (Linux and macOS on
-x64/arm64, Windows on x64 — including the browser/terminal control helpers)
-installs as an optional dependency straight from the npm registry — no install
-scripts, no downloads outside npm. Bun, pnpm, and yarn work the same way with
-no trust or approval steps. Installs that skip optional dependencies
-(`--omit=optional`) still work: the wrapper fetches the binary from the
-matching GitHub Release whenever it is missing. Windows on ARM runs the x64
-build under emulation. See [docs/NPM_PACKAGING.md](docs/NPM_PACKAGING.md) for
-how the package is put together.
-
-Installed Zero as `@gitlawb/zero`? The package moved to `@twigpine/zero` in
-0.10.0 and the old name gets no further releases. Both packages provide the
-`zero` command, so quit any running `zero`, then remove the old package first:
-
-```bash
-npm uninstall -g @gitlawb/zero
-npm install -g @twigpine/zero
-```
-
-Your config, sessions, and logins are kept; they live outside the package. For
-Bun, pnpm, and yarn, see [docs/INSTALL.md](docs/INSTALL.md#moving-from-gitlawbzero).
-
-### Install scripts
-
-Linux/macOS:
-
-```bash
-curl -fsSL https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.sh | bash
-```
-
-Windows PowerShell:
-
-```powershell
-irm https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.ps1 | iex
-```
-
-### From source
-
-Source builds require Go 1.26.9+.
-
-```bash
-git clone https://github.com/Twigpine/zero.git
-cd zero
-go run ./cmd/zero
-```
-
-Release installers and the npm wrapper require published GitHub Release assets.
-If you are testing before the first public release, build from source:
-
-```bash
-go build -o zero ./cmd/zero
-```
-
-On Linux, build the sandbox helper too if you want native sandboxing:
-
-```bash
-go build -o zero-linux-sandbox ./cmd/zero-linux-sandbox
-go build -o zero-seccomp ./cmd/zero-seccomp   # optional compatibility wrapper
-```
-
-Put `zero` and `zero-linux-sandbox` in the same directory on `PATH`
-(`~/.local/bin` is a good default). macOS does not need an extra helper binary.
-Windows source builds can use the main `zero.exe` as their sandbox helper; release
-archives still ship standalone Windows helper executables.
-
-More install details: [docs/INSTALL.md](docs/INSTALL.md).
-
-## First Run
-
-Start the TUI:
-
-```bash
-zero
-```
-
-The setup wizard helps you pick a provider and model. You can also configure
-providers from the command line:
-
-```bash
-zero setup
-zero providers list
-zero models list
-zero doctor
-```
-
-For API providers, set the matching environment variable before setup or enter
-the key in the wizard:
+Point Zero at a model — either set environment variables:
 
 ```bash
 export OPENAI_API_KEY=sk-...
-export ANTHROPIC_API_KEY=...
-export GEMINI_API_KEY=...
-export AIMLAPI_API_KEY=...
-export LONGCAT_API_KEY=...
-export FIREWORKS_API_KEY=...
-export GMI_API_KEY=...
-export MINIMAX_API_KEY=...
-export MINIMAXI_API_KEY=...
+# optional: any OpenAI-compatible endpoint / model
+export OPENAI_BASE_URL=https://api.openai.com/v1
+export OPENAI_MODEL=gpt-4.1
 ```
 
-To configure AI/ML API directly, run:
+…or save reusable provider profiles in `~/.config/zero/config.json` and manage them with
+`zero providers`. Run `zero doctor` anytime to verify your setup.
+
+## Usage
+
+### Interactive (TUI)
 
 ```bash
-zero providers setup aimlapi --set-active
+go run ./cmd/zero    # or: zero after installation
 ```
 
-To configure Meituan LongCat (LongCat-2.0) directly, run:
+Inside the TUI: type to chat and press **Enter** to send. `/` opens command suggestions
+(**Tab** accepts the first). When the prompt is empty, the arrow keys, **PgUp/PgDn**, and
+**Home/End** scroll the transcript. **Ctrl+C** exits.
+
+### Headless (`exec`)
 
 ```bash
-zero providers setup longcat --set-active
-```
+# one-shot
+zero exec "explain internal/agent/loop.go and suggest one improvement"
 
-To configure Fireworks AI directly, run:
+# from a file, with a specific model, as JSON for scripts
+zero exec --file task.md --model claude-sonnet-4.5 --output-format json
 
-```bash
-zero providers setup fireworks --set-active
-```
-
-To configure GMI Cloud directly, run:
-
-```bash
-zero providers setup gmicloud --set-active
-```
-
-MiniMax presets use the Anthropic-compatible endpoints for the global and China
-regions:
-
-```bash
-zero providers add minimax --set-active
-zero providers add minimaxi-cn --set-active
-```
-
-To use the OpenAI-compatible endpoints instead, add a custom compatible profile
-for the required region:
-
-```bash
-zero providers add custom-openai-compatible \
-  --name minimax-openai \
-  --model MiniMax-M3 \
-  --base-url https://api.minimax.io/v1 \
-  --api-key-env MINIMAX_API_KEY \
-  --set-active
-
-zero providers add custom-openai-compatible \
-  --name minimax-cn-openai \
-  --model MiniMax-M3 \
-  --base-url https://api.minimaxi.com/v1 \
-  --api-key-env MINIMAXI_API_KEY \
-  --set-active
-```
-
-For local models, run Ollama, LM Studio, or the [Atomic Chat](https://atomic.chat)
-desktop app, then use `zero setup` or `zero providers detect`. For Atomic Chat,
-load a model and enable its local OpenAI-compatible API (default
-`http://127.0.0.1:1337/v1`). Choose `atomic-chat-local`; detection includes the
-loaded model ID in the add command. If no usable ID is discovered, load a model
-and retry. Model IDs requiring shell-specific quoting use interactive setup.
-
-## Daily Use
-
-### Interactive TUI
-
-```bash
-zero
-```
-
-Useful controls:
-
-| Control | Action |
-|---|---|
-| `Enter` | send the prompt |
-| `/` | open slash-command suggestions |
-| `Ctrl+X` then letter | common slash commands (e.g. `m` → `/model`; `Ctrl+X` `?` for full list) |
-| `Ctrl+P` / `Ctrl+N` | previous / next item in menus (arrows still work) |
-| `Shift+Tab` | cycle permission mode |
-| `Ctrl+B` | show/hide the sidebar |
-| `Ctrl+C` | cancel, exit, or return from a `/btw` conversation |
-
-Common slash commands:
-
-| Command | Purpose |
-|---|---|
-| `/model`, `/provider` | switch the active model/provider |
-| `/spec`, `/plan` | draft and review a plan before building |
-| `/image` | attach an image for vision-capable models |
-| `/resume`, `/rewind` | continue or roll back local sessions |
-| `/new` | start a fresh session in place (previous session stays on disk) |
-| `/btw [question]` | ask in an isolated fork without adding the side conversation to the main session |
-| `/loop` | repeat a prompt or custom `/command` on an interval (`/loop 5m /babysit-prs`) or self-paced |
-| `/compact`, `/context` | manage context usage |
-| `/permissions`, `/tools` | inspect available tools and policy |
-| `/add-dir` | allow an extra write directory for this session |
-| `/theme`, `/doctor`, `/config` | adjust appearance and inspect setup |
-
-### Headless `exec`
-
-```bash
-zero exec "explain internal/agent/loop.go"
-zero exec --model claude-sonnet-4.5 "refactor the config loader"
-zero exec --use-spec "add rate limiting to the API client"
-zero exec --worktree "try the migration in an isolated worktree"
-zero exec --resume
-zero exec --fork <session-id> "try the other approach"
-```
-
-Programmatic use:
-
-```bash
+# multi-turn / programmatic over stdio
 zero exec --input-format stream-json --output-format stream-json < turns.jsonl
 ```
 
-The stream-JSON contract is documented in
-[docs/STREAM_JSON_PROTOCOL.md](docs/STREAM_JSON_PROTOCOL.md).
+`exec` flags: `-f, --file` · `-m, --model` · `-C, --cwd` · `-i, --input-format <text|stream-json>` ·
+`-o, --output-format <text|json|stream-json>` · `--skip-permissions-unsafe`.
+stdout carries **only** program output; logs go to stderr. See
+[`docs/STREAM_JSON_PROTOCOL.md`](docs/STREAM_JSON_PROTOCOL.md).
 
-## Safety Model
-
-Zero is designed to make side effects visible.
-
-- Workspace reads are allowed by default.
-- File writes are limited to the workspace unless you grant another directory.
-- Shell commands, network access, destructive commands, and elevated actions are
-  permission-gated.
-- `--add-dir <path>` and `/add-dir <path>` grant additional write roots without
-  giving the agent the whole filesystem.
-- Unsafe/autonomous modes are explicit opt-ins.
-- Secrets are redacted from tool output and logs where Zero controls the surface.
-
-Example:
+### Other commands
 
 ```bash
-zero --add-dir ../docs-site
-zero exec --add-dir ../shared "update both repos"
+zero providers list|current                 # inspect resolved provider profiles
+zero models list [--provider anthropic]     # inspect the model registry
+zero search "<query>" [--json --session <id> --type <event>]   # search local sessions
+zero doctor [--connectivity] [--json]        # health checks
+zero config [--json]                          # inspect resolved configuration
+zero sandbox policy [--json]                 # inspect sandbox backend support
+zero serve --mcp [-C <path>]                  # expose Zero read-only tools over MCP stdio
+zero update --check [--json --target windows-x64] # check for a newer release
 ```
 
-Sandbox behavior can be inspected with:
+## Providers & models
 
-```bash
-zero sandbox policy
-zero sandbox grants list
-```
+Selectable per task and per session. The model registry knows each model's provider,
+capabilities, context window, and cost.
 
-## Web And Local Control
-
-Zero includes local file/search/edit/shell tools, `web_fetch` for public URLs,
-and MCP support for additional tools.
-
-`web_fetch` refuses loopback, private and other special-use addresses: it checks
-the URL before asking permission, resolves the host, and dials the address it
-validated so a name cannot resolve to something else in between.
-
-If `HTTP_PROXY`/`HTTPS_PROXY` is set, `web_fetch` and the provider connectivity
-probe use it, and that last step changes: the proxy is dialed and the target
-hostname is sent to it, so the proxy decides which address the request actually
-reaches. The URL is still checked and resolved locally first, but a proxy that
-answers differently can reach a private service. A forward proxy already sees
-and can rewrite every request through it, so this is the trust you accept by
-configuring one. Leave the variables unset for the checks to be enforced end to
-end.
-
-For local dev servers, use shell commands such as `curl` through `exec_command`
-so the normal sandbox and permission policy applies. Long-running commands stay
-attached to a background terminal session and can be listed or stopped from the
-TUI.
-
-The npm package also includes browser and terminal helper packages used by local
-browser/terminal tools. Source builds can use the same helpers when they are on
-`PATH` or configured in Zero's local-control settings.
-
-## Common Commands
-
-```text
-zero                  interactive TUI
-zero exec             one-shot or scripted agent run
-zero setup            first-run provider setup
-zero auth             OAuth/login helpers for supported providers
-zero models           model registry and capabilities
-zero providers        provider profiles and detection
-zero doctor           setup, key, and connectivity checks
-zero context          context-budget report
-zero repo-map         deterministic repository map
-zero repo-info        local repository summary
-zero search | find    search local session history
-zero sessions         inspect, resume, fork, rewind, and prune sessions
-zero spec             manage spec-mode drafts
-zero specialist       manage specialist subagents
-zero skills           manage markdown instruction skills
-zero plugins          manage plugins
-zero hooks            manage lifecycle hooks
-zero mcp              manage MCP servers and tools
-zero serve --mcp      expose Zero tools over MCP stdio
-zero sandbox          inspect sandbox policy and grants
-zero worktrees        prepare isolated git worktrees
-zero verify           detect and run local verification checks
-zero changes          inspect and commit local git changes
-zero usage            token usage and estimated cost
-zero cron             scheduled agent jobs
-zero update --check   check for newer releases
-zero upgrade          download, verify, and install the latest release
-```
-
-Cron keeps the newest 1,000 run outcomes per job in `runs.jsonl`. Each new run
-atomically replaces the history with the retained tail; existing larger histories
-are trimmed on their next run. Archive the file before that run if you need older
-outcomes. This retention does not delete session directories or reset fire counts.
-Malformed records and legacy lines of 1 MiB or more are skipped when reading or
-compacting history; new records of that size are rejected.
-
-## Extending Zero
-
-### Project and personal instructions
-
-Zero appends project-specific guidance to the system prompt from the first
-`AGENTS.md`, `ZERO.md`, or `.zero/AGENTS.md` file found in each directory from
-the git root down to your current working directory (checked in that order
-per directory). Files are injected general-to-specific, capped at 8 KiB per
-file and 32 KiB total.
-
-A personal `ZERO.md` under `config.UserConfigDir()/zero/ZERO.md`
-(`$XDG_CONFIG_HOME/zero/ZERO.md` or `~/.config/zero/ZERO.md` on Linux/macOS,
-`%AppData%\Roaming\zero\ZERO.md` on Windows) applies across every workspace, ahead of any project guidelines.
-
-### Plugins
-
-Plugins are discovered from `~/.config/zero/plugins/<name>/plugin.json` (user
-scope — `$XDG_CONFIG_HOME` or `~/.config` on every OS, independent of the
-`config.UserConfigDir()` path used above) and `<cwd>/.zero/plugins/<name>/plugin.json`
-(project scope — resolved from the current working directory, not the repo
-root), and managed with `zero plugins`. A manifest can declare:
-
-- `tools` — custom tools (`command`, `args`, `inputSchema`, and a
-  `permission` of `prompt` or `deny`; `allow` is honored only when manifest tool
-  auto-approval is enabled)
-- `hooks` — commands run on `beforeTool`, `afterTool`, `sessionStart`, or
-  `sessionEnd`
-- `prompts` and `skills` — additional prompt/skill files
-
-MCP servers (`zero mcp`) and standalone markdown skills (`zero skills`) use
-the same extension points and can also be wired up outside of a plugin
-manifest.
-
-## Appearance And Accessibility
-
-| Control | Effect |
+| Provider | Example models |
 |---|---|
-| `NO_COLOR=<anything>` | disables color output |
-| `ZERO_THEME=<name>` | selects the startup theme (`auto`, `dark`, `light`, or a color theme like `dracula`, `nord`, `gruvbox`, `tokyo-night`, `catppuccin`, `one-dark`, `solarized-dark`, `rose-pine`, `everforest`, `neon`, `solarized-light`, `dune`) |
-| `--theme <name>` | selects the TUI theme from the CLI (same names) |
-| `/theme` | opens the theme picker inside the TUI (live preview; `/theme <name>` switches directly) |
-| `ZERO_NO_FADE=1` | disables streaming fade animation |
+| OpenAI-compatible | `gpt-4.1`, `gpt-4.1-mini`, `gpt-4o`, `gpt-4o-mini` |
+| Anthropic | `claude-opus-4.1`, `claude-sonnet-4.5`, `claude-haiku-4.5` |
+| Google Gemini | `gemini-2.5-pro`, `gemini-2.5-flash`, `gemini-2.5-flash-lite` |
 
-Meaning does not rely on color alone; diffs, permissions, and statuses also use
-text or glyph markers.
+Any OpenAI-compatible endpoint works with just a base URL, key, and model — so local
+runtimes (Ollama, gateways, etc.) plug in the same way.
+
+## Tools
+
+| Tool | Purpose | Side effect |
+|---|---|---|
+| `read_file` · `list_directory` · `grep` · `glob` | explore & search | read |
+| `update_plan` | maintain a live task plan | plan |
+| `write_file` · `edit_file` · `apply_patch` | create & modify files | write (gated) |
+| `bash` | run shell commands | shell (gated) |
+
+Write/shell tools route through the permission policy before any side effect.
+
+## Architecture
+
+```
+ Terminal (Bubble Tea target)   headless `exec`      (future) editor ext
+            └───────────────────┬───────────────────────┘
+                    Go-native core target (loop, events, tools)
+   ┌──────────┬───────────┬──────────┬──────────┬───────────┬──────────┐
+ providers   tools     sessions    usage     redaction    doctor /   stream-json
+ + registry  registry  + search   + cost                  config
+```
+
+- **Go-native target**: `cmd/zero` is the default production runtime; the npm package delegates to the built Go binary.
+- **Surface-agnostic core**: the agent loop streams text + tool calls, executes tools, and emits a typed event stream consumed identically by every surface.
+- **Edges are interfaces**: `Provider`, `Tool`, `SessionStore`, and the permission policy are swappable.
+- **Model is data**: capabilities, cost, and routing live in the registry — never hard-coded.
+
+## Project layout
+
+```
+cmd/
+  zero/                  # production Go CLI entrypoint
+  zero-pr-review/        # deterministic PR review helper
+internal/
+  agent/                 # Go agent loop and tool-call orchestration
+  cli/                   # interactive/headless command surface
+  config/                # layered configuration and provider profiles
+  providers/             # OpenAI-compatible, Anthropic, Gemini adapters
+  tools/                 # read/write/edit/bash/grep/glob/apply_patch tools
+  tui/                   # Bubble Tea terminal interface
+  sessions/ search/      # append-only sessions and local search
+  usage/ modelregistry/  # token usage and model metadata/costs
+  doctor/ verify/        # diagnostics and self-verification
+  streamjson/            # headless stream-json protocol
+  mcp/ plugins/ hooks/   # extension-facing runtime surfaces
+bin/                     # npm wrapper entrypoint
+scripts/                 # installers
+docs/                    # PRD + protocol/install/perf docs
+```
 
 ## Development
 
 ```bash
-go test ./...
-go run ./cmd/zero-release build
-go run ./cmd/zero-release smoke
-go run ./cmd/zero-perf-bench
+go test ./...                     # run the test suite
+go run ./cmd/zero-release build   # compile the release-facing Go binary
+go run ./cmd/zero-release smoke   # verify the release-facing Go binary
+go run ./cmd/zero-perf-bench      # performance benchmarks (see docs/PERFORMANCE.md)
 ```
 
-Experimental: `ZERO_OPENAI_TURN_SESSION=1` enables the optimized OpenAI turn
-session (background connection prewarm + request-prefix telemetry) for headless
-`zero exec` runs against official OpenAI profiles. Off by default; `0`, `false`,
-or `off` disable it. A/B-benchmark it by running the same `zero-perf-bench` suite
-with the variable unset and set.
-
-Native ChatGPT Responses sessions are enabled by default. Set
-`ZERO_CHATGPT_TURN_SESSION=0`, `false`, or `off` to restore stateless HTTP/SSE
-transport.
-
-### Code Quality and Security Checks
-
-Before committing any changes, ensure all Go code quality and security checks pass. The `make` targets below pin each tool to this module's Go version, so they load correctly even when your default `go` toolchain is older — running the plain `go run ...@version` form yourself can select the tool module's own (older) toolchain and fail to load this module instead.
-
-1. **Formatting**: Run `make fmt` (or `go fmt ./...`).
-2. **Vetting**: Run `make vet` (or `go vet ./...`).
-3. **Linting**: Run `make lint-static`.
-4. **Vulnerability Scan**: Run `make vulncheck`.
-
-Use the repository-managed targets rather than globally installed binaries:
-the targets apply the module's required Go toolchain as well as the reviewed,
-pinned tool versions.
-
-The installed binaries land in `$GOBIN` when it is set, otherwise in
-`$GOPATH/bin` (default `~/go/bin`). That directory must be on your `PATH` to
-run them directly. If it isn't, add it:
-
-```bash
-gobin="$(go env GOBIN)"; [ -z "$gobin" ] && gobin="$(go env GOPATH)/bin"
-case ":$PATH:" in *":$gobin:"*) ;; *) export PATH="$PATH:$gobin" ;; esac
-```
-
-### Cross-Compile Examples
+Cross-compile by passing Go targets to the builder:
 
 ```bash
 go run ./cmd/zero-release build --goos linux --goarch amd64
 go run ./cmd/zero-release build --goos windows --goarch amd64 --output dist/zero.exe
 ```
 
+### Install from a release
+
+```bash
+# Linux / macOS
+scripts/install.sh
+
+# Windows
+powershell -ExecutionPolicy Bypass -File scripts/install.ps1
+```
+
+See [`docs/INSTALL.md`](docs/INSTALL.md) for version, repository, and install-path overrides,
+and [`docs/UPDATE.md`](docs/UPDATE.md) for the update flow.
+
 ## Documentation
 
-- [Install](docs/INSTALL.md)
-- [Update flow](docs/UPDATE.md)
-- [Themes](docs/THEMES.md)
-- [Stream-JSON protocol](docs/STREAM_JSON_PROTOCOL.md)
-- [Specialists](docs/SPECIALISTS.md)
-- [GitHub Action](docs/GITHUB_ACTION.md)
-- [Benchmarks](docs/BENCHMARK.md)
-- [Performance](docs/PERFORMANCE.md)
-- [Agent evals](docs/AGENT_EVALS.md)
-
-## Community
-
-Real-time chat happens on the [Discord server](https://discord.gg/CaQDS6wdFn).
-
-Questions, setup help, ideas, and sharing all live in
-[GitHub Discussions](https://github.com/Twigpine/zero/discussions):
-
-| Category | Use it for |
-|---|---|
-| [Q&A](https://github.com/Twigpine/zero/discussions/categories/q-a) | Setup help, provider/model configuration, "how do I" questions |
-| [Ideas](https://github.com/Twigpine/zero/discussions/categories/ideas) | Feature proposals and design discussion before any PR |
-| [Show and tell](https://github.com/Twigpine/zero/discussions/categories/show-and-tell) | Your skills, plugins, MCP setups, themes, and workflows |
-| [Announcements](https://github.com/Twigpine/zero/discussions/categories/announcements) | Releases and project news from the maintainers |
-
-For a good Q&A answer fast, include `zero --version`, your OS and install
-method, the provider/model in use, and `zero doctor` output. See
-[SUPPORT.md](SUPPORT.md). Bugs belong in
-[issues](https://github.com/Twigpine/zero/issues/new/choose); security reports
-follow [SECURITY.md](SECURITY.md), never a public thread.
+- [Product Requirements (PRD)](docs/PRD.md) — vision, goals, full feature spec, roadmap
+- [Stream-JSON protocol](docs/STREAM_JSON_PROTOCOL.md) — headless I/O contract
+- [Headless exec PRD](docs/M1_HEADLESS_EXEC_PRD.md)
+- [npm wrapper smoke checklist](docs/NPM_WRAPPER_SMOKE.md)
+- [Performance](docs/PERFORMANCE.md) · [Install](docs/INSTALL.md) · [Update](docs/UPDATE.md)
 
 ## Contributing
 
-Contributions are welcome. Read [CONTRIBUTING.md](CONTRIBUTING.md), run the
-relevant tests, and open a focused pull request.
-
-Security reports should follow [SECURITY.md](SECURITY.md).
+Contributions are welcome — see [CONTRIBUTING.md](CONTRIBUTING.md). Please run
+`go test ./...` and the relevant build or smoke command before opening a PR.
 
 ## License
 
-Zero is released under the [MIT License](LICENSE).
+License is being finalized; a `LICENSE` file will be added before a public release.
+
+---
+
+<sub>Go-native core with an npm distribution wrapper.</sub>

README_ZH.md

@@ -1,387 +0,0 @@
-<p align="center">
-  <img src="docs/assets/zero-logo.png" alt="Zero" width="385">
-</p>
-
-<p align="center"><strong>一个独属于你的终端编码智能体。</strong></p>
-
-<p align="center">
-  <a href="https://trendshift.io/repositories/70679?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-70679" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/70679/daily?language=Go" alt="Twigpine/zero | Trendshift" width="250" height="55"/></a>
-  <a href="https://trendshift.io/repositories/70679?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-70679" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/70679/weekly?language=Go" alt="Twigpine/zero | Trendshift" width="250" height="55"/></a>
-  <a href="https://trendshift.io/repositories/70679?utm_source=repository-badge&amp;utm_medium=badge&amp;utm_campaign=badge-repository-70679" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/repositories/70679" alt="Twigpine/zero | Trendshift" width="250" height="55"/></a>
-</p>
-
-<p align="center">
-  <a href="LICENSE"><img alt="license" src="https://img.shields.io/badge/license-MIT-blue"></a>
-  <img alt="Go 1.26.9+" src="https://img.shields.io/badge/Go-1.26.9+-00ADD8?logo=go&logoColor=white">
-  <img alt="25+ providers" src="https://img.shields.io/badge/providers-25+-34E2EA">
-  <a href="https://discord.gg/CaQDS6wdFn"><img alt="Discord" src="https://img.shields.io/badge/Discord-join-5865F2?logo=discord&logoColor=white"></a>
-  <br>
-  <a href="README.md">English</a> | <strong>中文</strong>
-</p>
-
-Zero 是一个用于本地终端的 AI 编码智能体。它可以检查仓库、编辑文件、运行命令、使用浏览器/终端辅助工具，并在你选择模型和权限级别的同时保持持久的本地会话。
-
-```bash
-zero
-zero exec "修复 ./pkg 中失败的测试"
-zero exec --output-format stream-json < turns.jsonl
-```
-
-## 合作伙伴
-
-<table align="center">
-  <tr>
-    <td align="center" width="150" height="80">
-      <a href="https://twigpine.com">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="https://twigpine.com/logo-dark.png">
-          <img src="https://twigpine.com/logo.png" alt="Twigpine logo" width="72">
-        </picture>
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://mimo.mi.com">
-        <img src="https://mimo.xiaomi.com/mimo-v2-pro/assets/logo.svg" alt="Xiaomi MiMo logo" width="136">
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://novita.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/novita-logo-dark.svg">
-          <img src="docs/assets/novita-logo.svg" alt="Novita AI logo" width="136">
-        </picture>
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://concentrate.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/concentrate-logo-dark.svg">
-          <img src="docs/assets/concentrate-logo.svg" alt="Concentrate logo" width="64">
-        </picture>
-      </a>
-    </td>
-    <td align="center" width="150" height="80">
-      <a href="https://exa.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/exa-logo-dark.svg">
-          <img src="docs/assets/exa-logo.svg" alt="Exa logo" width="110">
-        </picture>
-      </a>
-    </td>
-  </tr>
-  <tr>
-    <td align="center"><a href="https://twigpine.com"><strong>Twigpine</strong></a></td>
-    <td align="center"><a href="https://mimo.mi.com"><strong>Xiaomi MiMo</strong></a></td>
-    <td align="center"><a href="https://novita.ai/"><strong>Novita AI</strong></a></td>
-    <td align="center"><a href="https://concentrate.ai/"><strong>Concentrate</strong></a></td>
-    <td align="center"><a href="https://exa.ai/"><strong>Exa</strong></a></td>
-  </tr>
-  <tr>
-    <td align="center" width="150" height="80">
-      <a href="https://www.gmicloud.ai/">
-        <picture>
-          <source media="(prefers-color-scheme: dark)" srcset="docs/assets/gmi-cloud-logo-dark.svg">
-          <img src="docs/assets/gmi-cloud-logo.svg" alt="GMI Cloud logo" width="120">
-        </picture>
-      </a>
-    </td>
-  </tr>
-  <tr>
-    <td align="center"><a href="https://www.gmicloud.ai/"><strong>GMI Cloud</strong></a></td>
-  </tr>
-</table>
-
-## 为什么选择 Zero
-
-- **使用你想要的模型。** 支持 OpenAI、Anthropic、Gemini、Groq、OpenRouter、DeepSeek、Mistral、xAI、Qwen、Kimi、GitHub Models、Ollama、LM Studio、Atomic Chat，或任何 OpenAI/Anthropic 兼容端点。
-- **保持控制权。** 文件写入、Shell 命令、网络访问和工作区外写入都经过 Zero 的权限和沙箱策略。
-- **在终端中工作。** TUI 具有模型/提供商选择器、图片输入、斜杠命令、实时计划/工具渲染、回滚滚动、主题以及恢复/分叉支持。
-- **无 TUI 也能工作。** `zero exec` 可脚本化，支持文本/JSON/stream-JSON I/O、隔离的工作树、规范优先运行，以及用于 CI 的有意义的退出码。
-- **保持上下文本地化。** 会话存储在磁盘上，可搜索、可恢复，且 Zero 不会作为遥测数据上传。
-- **可扩展。** 使用 MCP 服务器、技能、插件、钩子和来自同一 CLI 的专业子智能体。
-
-## 安装
-
-### npm
-
-```bash
-npm install -g @twigpine/zero
-zero
-```
-
-npm 包是一个小型包装器，其平台构建（Linux 和 macOS 的 x64/arm64、Windows 的 x64，包含浏览器/终端控制辅助工具）作为可选依赖直接从 npm registry 安装——没有安装脚本，也不会从 npm 之外下载任何内容。Bun、pnpm 和 yarn 的行为完全一致，无需任何信任或批准步骤。跳过可选依赖的安装（`--omit=optional`）也能工作：只要二进制文件缺失，包装器就会从对应的 GitHub Release 下载。Windows on ARM 通过模拟运行 x64 构建。详见 [docs/NPM_PACKAGING.md](docs/NPM_PACKAGING.md)。
-
-之前通过 `@gitlawb/zero` 安装过 Zero？从 0.10.0 起，npm 包已迁移到 `@twigpine/zero`，旧包名不再发布新版本。两个包都提供 `zero` 命令，所以请先退出正在运行的 `zero`，再卸载旧包：
-
-```bash
-npm uninstall -g @gitlawb/zero
-npm install -g @twigpine/zero
-```
-
-配置、会话和登录信息都会保留，它们存放在包之外。Bun、pnpm 和 yarn 的命令见 [docs/INSTALL.md](docs/INSTALL.md#moving-from-gitlawbzero)。
-
-### 安装脚本
-
-Linux/macOS：
-
-```bash
-curl -fsSL https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.sh | bash
-```
-
-Windows PowerShell：
-
-```powershell
-irm https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.ps1 | iex
-```
-
-### 从源码构建
-
-源码构建需要 Go 1.26.9+。
-
-```bash
-git clone https://github.com/Twigpine/zero.git
-cd zero
-go run ./cmd/zero
-```
-
-发布安装器和 npm 包需要已发布的 GitHub Release 资源。如果你在首次公开发布之前进行测试，请从源码构建：
-
-```bash
-go build -o zero ./cmd/zero
-```
-
-在 Linux 上，如果你需要原生沙箱，还需要构建沙箱辅助程序：
-
-```bash
-go build -o zero-linux-sandbox ./cmd/zero-linux-sandbox
-go build -o zero-seccomp ./cmd/zero-seccomp   # 可选的兼容性包装器
-```
-
-将 `zero` 和 `zero-linux-sandbox` 放在 `PATH` 上的同一目录中（`~/.local/bin` 是一个好的默认选择）。macOS 不需要额外的辅助二进制文件。Windows 源码构建可以使用主 `zero.exe` 作为沙箱辅助程序；发布包仍然附带独立的 Windows 辅助可执行文件。
-
-更多安装细节：[docs/INSTALL.md](docs/INSTALL.md)。
-
-## 首次运行
-
-启动 TUI：
-
-```bash
-zero
-```
-
-设置向导帮助你选择提供商和模型。你也可以从命令行配置提供商：
-
-```bash
-zero setup
-zero providers list
-zero models list
-zero doctor
-```
-
-对于 API 提供商，在设置之前设置匹配的环境变量或在向导中输入密钥：
-
-```bash
-export OPENAI_API_KEY=sk-...
-export ANTHROPIC_API_KEY=...
-export GEMINI_API_KEY=...
-export LONGCAT_API_KEY=...
-export GMI_API_KEY=...
-```
-
-要直接配置美团 LongCat（LongCat-2.0），运行：
-
-```bash
-zero providers setup longcat --set-active
-```
-
-要直接配置 GMI Cloud，运行：
-
-```bash
-zero providers setup gmicloud --set-active
-```
-
-对于本地模型，运行 Ollama、LM Studio 或 [Atomic Chat](https://atomic.chat) 桌面应用，
-然后使用 `zero setup` 或 `zero providers detect`。使用 Atomic Chat 时，请先加载模型并启用
-本地 OpenAI 兼容 API（默认地址为 `http://127.0.0.1:1337/v1`），再选择 `atomic-chat-local`。
-检测生成的添加命令会包含已加载的模型 ID；如果未发现可用的 ID，请加载模型后重试。
-对于需要特定 Shell 转义的模型 ID，请使用交互式设置。
-
-## 日常使用
-
-### 交互式 TUI
-
-```bash
-zero
-```
-
-常用控制：
-
-| 控制 | 操作 |
-|---|---|
-| `Enter` | 发送提示 |
-| `/` | 打开斜杠命令建议 |
-| `Shift+Tab` | 切换权限模式 |
-| `Ctrl+B` | 显示/隐藏侧边栏 |
-| `Ctrl+C` | 取消或退出 |
-
-常用斜杠命令：
-
-| 命令 | 用途 |
-|---|---|
-| `/model`、`/provider` | 切换活动模型/提供商 |
-| `/spec`、`/plan` | 在构建之前起草和审查计划 |
-| `/image` | 为视觉模型附加图片 |
-| `/resume`、`/rewind` | 继续或回滚本地会话 |
-| `/new` | 原地开始一个新会话（之前的会话仍保留在磁盘上） |
-| `/compact`、`/context` | 管理上下文使用 |
-| `/permissions`、`/tools` | 检查可用工具和策略 |
-| `/add-dir` | 为此会话授予额外的写入目录 |
-| `/theme`、`/doctor`、`/config` | 调整外观和检查设置 |
-
-### 无头 `exec` 模式
-
-```bash
-zero exec "解释 internal/agent/loop.go"
-zero exec --model claude-sonnet-4.5 "重构配置加载器"
-zero exec --use-spec "为 API 客户端添加速率限制"
-zero exec --worktree "在隔离的工作树中尝试迁移"
-zero exec --resume
-zero exec --fork <session-id> "尝试另一种方法"
-```
-
-编程使用：
-
-```bash
-zero exec --input-format stream-json --output-format stream-json < turns.jsonl
-```
-
-Stream-JSON 协议文档在 [docs/STREAM_JSON_PROTOCOL.md](docs/STREAM_JSON_PROTOCOL.md)。
-
-## 安全模型
-
-Zero 旨在使副作用可见。
-
-- 工作区读取默认允许。
-- 文件写入限制在工作区内，除非你授予其他目录。
-- Shell 命令、网络访问、破坏性命令和提权操作需要权限授权。
-- `--add-dir <path>` 和 `/add-dir <path>` 授予额外的写入根目录，而不会给智能体整个文件系统。
-- 不安全/自主模式是显式选择加入。
-- 在 Zero 控制的界面上，密钥会从工具输出和日志中被脱敏。
-
-示例：
-
-```bash
-zero --add-dir ../docs-site
-zero exec --add-dir ../shared "更新两个仓库"
-```
-
-沙箱行为可以通过以下方式检查：
-
-```bash
-zero sandbox policy
-zero sandbox grants list
-```
-
-## Web 和本地控制
-
-Zero 包含本地文件/搜索/编辑/Shell 工具、用于公共 URL 的 `web_fetch`，以及用于额外工具的 MCP 支持。
-
-对于本地开发服务器，使用 Shell 命令（如通过 `exec_command` 的 `curl`），这样正常的沙箱和权限策略就会生效。长时间运行的命令保持附加到后台终端会话，可以从 TUI 中列出或停止。
-
-npm 包还包含本地浏览器/终端工具使用的浏览器和终端辅助包。源码构建可以在它们位于 `PATH` 上或在 Zero 的本地控制设置中配置时使用相同的辅助工具。
-
-## 常用命令
-
-```text
-zero                  交互式 TUI
-zero exec             一次性或脚本化智能体运行
-zero setup            首次运行提供商设置
-zero auth             支持提供商的 OAuth/登录辅助
-zero models           模型注册表和能力
-zero providers        提供商配置和检测
-zero doctor           设置、密钥和连接检查
-zero context          上下文预算报告
-zero repo-map         确定性仓库映射
-zero repo-info        本地仓库摘要
-zero search | find    搜索本地会话历史
-zero sessions         检查、恢复、分叉、回滚和清理会话
-zero spec             管理规范模式草稿
-zero specialist       管理专业子智能体
-zero skills           管理 Markdown 指令技能
-zero plugins          管理插件
-zero hooks            管理生命周期钩子
-zero mcp              管理 MCP 服务器和工具
-zero serve --mcp      通过 MCP stdio 暴露 Zero 工具
-zero sandbox          检查沙箱策略和授权
-zero worktrees        准备隔离的 Git 工作树
-zero verify           检测和运行本地验证检查
-zero changes          检查和提交本地 Git 变更
-zero usage            Token 使用量和估算成本
-zero cron             定时智能体任务
-zero update --check   检查更新版本
-zero upgrade          下载、验证并安装最新版本
-```
-
-## 外观和无障碍
-
-| 控制 | 效果 |
-|---|---|
-| `NO_COLOR=<任意值>` | 禁用颜色输出 |
-| `ZERO_THEME=<名称>` | 选择启动主题（`auto`、`dark`、`light`，或颜色主题如 `dracula`、`nord`、`gruvbox`、`tokyo-night`、`catppuccin`、`one-dark`、`solarized-dark`、`rose-pine`、`everforest`、`neon`、`solarized-light`、`dune`） |
-| `--theme <名称>` | 从 CLI 选择 TUI 主题（相同名称） |
-| `/theme` | 在 TUI 中打开主题选择器（实时预览；`/theme <名称>` 直接切换） |
-| `ZERO_NO_FADE=1` | 禁用流式淡入动画 |
-
-含义不仅仅依赖于颜色；差异、权限和状态也使用文本或标记符号。
-
-## 开发
-
-```bash
-go test ./...
-go run ./cmd/zero-release build
-go run ./cmd/zero-release smoke
-go run ./cmd/zero-perf-bench
-```
-
-交叉编译示例：
-
-```bash
-go run ./cmd/zero-release build --goos linux --goarch amd64
-go run ./cmd/zero-release build --goos windows --goarch amd64 --output dist/zero.exe
-```
-
-## 文档
-
-- [安装](docs/INSTALL.md)
-- [更新流程](docs/UPDATE.md)
-- [主题](docs/THEMES.md)
-- [Stream-JSON 协议](docs/STREAM_JSON_PROTOCOL.md)
-- [专家](docs/SPECIALISTS.md)
-- [GitHub Action](docs/GITHUB_ACTION.md)
-- [基准测试](docs/BENCHMARK.md)
-- [性能](docs/PERFORMANCE.md)
-- [智能体评估](docs/AGENT_EVALS.md)
-
-## 社区
-
-实时交流在 [Discord 服务器](https://discord.gg/CaQDS6wdFn) 进行。
-
-提问、安装帮助、想法和分享都在
-[GitHub Discussions](https://github.com/Twigpine/zero/discussions)：
-
-| 分类 | 用途 |
-|---|---|
-| [Q&A](https://github.com/Twigpine/zero/discussions/categories/q-a) | 安装帮助、提供商/模型配置、"如何做"类问题 |
-| [Ideas](https://github.com/Twigpine/zero/discussions/categories/ideas) | 功能提议和 PR 之前的设计讨论 |
-| [Show and tell](https://github.com/Twigpine/zero/discussions/categories/show-and-tell) | 你的技能、插件、MCP 配置、主题和工作流 |
-| [Announcements](https://github.com/Twigpine/zero/discussions/categories/announcements) | 维护者发布的版本和项目动态 |
-
-## 贡献
-
-欢迎贡献。阅读 [CONTRIBUTING.md](CONTRIBUTING.md)，运行相关测试，然后提交一个聚焦的拉取请求。
-
-安全报告应遵循 [SECURITY.md](SECURITY.md)。
-
-## 许可证
-
-Zero 基于 [MIT 许可证](LICENSE) 发布。

SECURITY.md

@@ -1,36 +0,0 @@
-# Security Policy
-
-Zero is a terminal coding agent: it reads and edits files in your repository and can run shell
-commands and call external model/tool endpoints. We take security reports seriously.
-
-## Reporting a vulnerability
-
-**Please do not open a public issue for security vulnerabilities.**
-
-Report privately through GitHub's private vulnerability reporting:
-
-1. Go to the repository's **Security** tab → **Report a vulnerability** (GitHub Security Advisories).
-2. Describe the issue, the affected version/commit, reproduction steps, and the impact.
-
-If you cannot use GitHub Security Advisories, open a regular issue that contains **only** a request to
-be contacted for a security report (no details), and a maintainer will arrange a private channel.
-
-Please include, where possible:
-
-- The version, branch, or commit affected.
-- A minimal reproduction and the impact (e.g. sandbox escape, secret exposure, RCE).
-- Any logs or output, with secrets redacted.
-
-## What to expect
-
-- We aim to acknowledge a report within a few business days.
-- We will work with you on a fix and a coordinated disclosure timeline, and credit you in the release
-  notes unless you prefer to remain anonymous.
-
-## Scope notes
-
-- Findings that require a malicious local user who already controls the machine running Zero, or that
-  depend on a user explicitly disabling the sandbox (`--skip-permissions-unsafe`), are generally
-  out of scope — but please report anything you are unsure about.
-- Zero sends no telemetry. Network calls go to the model/tool providers you configure (and, for
-  keyless web search, to Exa's hosted MCP endpoint at `https://mcp.exa.ai/mcp`).

SUPPORT.md

@@ -1,36 +0,0 @@
-# Getting help with Zero
-
-## Questions, setup help, configuration
-
-Ask in [GitHub Discussions](https://github.com/Gitlawb/zero/discussions). Use
-[Q&A](https://github.com/Gitlawb/zero/discussions/categories/q-a) so answers can
-be marked and found by the next person.
-
-The fastest way to a useful answer is to include:
-
-- `zero --version` output
-- your OS (Windows, macOS, Linux) and how you installed Zero (npm, install
-  script, source)
-- the provider and model you are using (`zero providers list`)
-- `zero doctor` output for setup problems
-- the exact command you ran and the exact error text
-
-## Bugs
-
-If Zero does something wrong (crashes, wrong output, broken behavior), file a
-[bug report](https://github.com/Gitlawb/zero/issues/new/choose). If you are not
-sure whether it is a bug or a setup problem, start in Discussions and we will
-promote it to an issue if it is one.
-
-## Feature ideas
-
-Start a thread in
-[Ideas](https://github.com/Gitlawb/zero/discussions/categories/ideas). Zero is
-in controlled development (see CONTRIBUTING.md), so discussing an idea first is
-also the path to getting a PR accepted.
-
-## Security issues
-
-Never file a public issue or discussion. Report privately via
-[GitHub Security Advisories](https://github.com/Gitlawb/zero/security/advisories/new)
-(see SECURITY.md).

action.yml

@@ -1,296 +0,0 @@
-name: ZERO
-description: >-
-  Run the ZERO coding agent headlessly in a GitHub workflow. ZERO is
-  model- and provider-agnostic: you supply the provider and API key as inputs.
-author: Twigpine
-
-branding:
-  icon: terminal
-  color: green
-
-inputs:
-  prompt:
-    description: The instruction for ZERO to execute. Mutually exclusive with prompt-file.
-    required: false
-    default: ""
-  prompt-file:
-    description: Path (relative to working-directory) to a file whose contents are the prompt.
-    required: false
-    default: ""
-  provider:
-    description: >-
-      Provider id to activate (for example openai, anthropic, gemini, ollama, or
-      any configured OpenAI-/Anthropic-compatible endpoint). Optional when the
-      repository already carries a .zero/config.json with an active provider.
-    required: false
-    default: ""
-  api-key:
-    description: >-
-      The provider API key. Pass it from a repository or organization secret;
-      it is exported only for the ZERO step and never written to the log.
-    required: false
-    default: ""
-  api-key-env:
-    description: >-
-      Name of the environment variable the chosen provider reads its key from
-      (for example OPENAI_API_KEY or ANTHROPIC_API_KEY). When set together with
-      api-key, that variable is exported only for the ZERO step. Leave the action
-      provider-agnostic by passing the env name your provider expects rather
-      than hardcoding one here.
-    required: false
-    default: ""
-  model:
-    description: Model id to use for the run. Defaults to the resolved provider's default.
-    required: false
-    default: ""
-  mode:
-    description: Run mode passed to `zero exec --mode` (for example smart, deep, or fast).
-    required: false
-    default: ""
-  auto:
-    description: >-
-      Autonomy ceiling passed to `zero exec --auto` (low, medium, or high).
-      Defaults to the conservative `low` so an unattended CI run cannot take
-      high-impact actions implicitly.
-    required: false
-    default: low
-  self-correct:
-    description: >-
-      When true, allow ZERO to request a stronger model mid-run if it hits a
-      wall (maps to `zero exec --allow-escalation`).
-    required: false
-    default: "false"
-  add-dir:
-    description: >-
-      Newline- or comma-separated extra write roots granted to the run (each
-      passed as `zero exec --add-dir`). The checked-out repository is always
-      writable; everything else stays read-only unless listed here.
-    required: false
-    default: ""
-  worktree:
-    description: When true, run inside an isolated git worktree (`zero exec --worktree`).
-    required: false
-    default: "false"
-  output-format:
-    description: >-
-      Output format for `zero exec` (text, json, or stream-json). Defaults to
-      stream-json, which is captured to a file and exposed as the output-file
-      output and uploaded by the caller if desired.
-    required: false
-    default: stream-json
-  post-to:
-    description: >-
-      Optional destination for a run summary after ZERO finishes: `pr-comment`
-      posts to the triggering pull request using github-token, `slack` posts to
-      slack-webhook-url, or `none` (default) posts nowhere.
-    required: false
-    default: none
-  slack-webhook-url:
-    description: >-
-      Slack incoming-webhook (or generic webhook) URL used when post-to is
-      slack. Pass it from a secret; it is never written to the log.
-    required: false
-    default: ""
-  github-token:
-    description: >-
-      Token used to post a PR comment when post-to is pr-comment. Defaults to
-      the workflow's GITHUB_TOKEN; the workflow must grant pull-requests: write.
-    required: false
-    default: ${{ github.token }}
-  working-directory:
-    description: Directory to run ZERO in. Defaults to the workspace root.
-    required: false
-    default: ${{ github.workspace }}
-  zero-version:
-    description: >-
-      ZERO release version/tag to install (for example v1.2.3 or latest).
-      Defaults to the ref this action was resolved at, falling back to latest.
-    required: false
-    default: ""
-  zero-repo:
-    description: Repository to install the ZERO release from (owner/repo).
-    required: false
-    default: Twigpine/zero
-
-outputs:
-  exit-code:
-    description: The exit code ZERO returned (0 success, 2 usage, 3 provider, non-zero otherwise).
-    value: ${{ steps.run.outputs.exit-code }}
-  output-file:
-    description: Path to the captured ZERO stdout (the raw output-format stream).
-    value: ${{ steps.run.outputs.output-file }}
-  summary:
-    description: A short human-readable summary line parsed from the run, when available.
-    value: ${{ steps.run.outputs.summary }}
-
-runs:
-  using: composite
-  steps:
-    - name: Install ZERO
-      shell: bash
-      env:
-        ZERO_REPO: ${{ inputs.zero-repo }}
-        ZERO_VERSION_INPUT: ${{ inputs.zero-version }}
-        ACTION_REF: ${{ github.action_ref }}
-        ACTION_PATH: ${{ github.action_path }}
-        RUNNER_TEMP: ${{ runner.temp }}
-      run: |
-        set -euo pipefail
-        if [ "${RUNNER_OS}" = "Windows" ]; then
-          echo "::error::The ZERO action currently supports Linux and macOS runners only." >&2
-          exit 1
-        fi
-        # Resolve the version to install: explicit input wins; otherwise the ref
-        # this action was checked out at (a tag); otherwise the latest release.
-        version="${ZERO_VERSION_INPUT}"
-        if [ -z "${version}" ]; then
-          version="${ACTION_REF}"
-        fi
-        # A commit-SHA pin (github.action_ref is the 40-hex SHA) is not a release
-        # tag, so fall back to latest rather than fetching releases/download/v<sha>.
-        case "${version}" in
-          ""|refs/*|*/*) version="latest" ;;
-        esac
-        if printf '%s' "${version}" | grep -qiE '^[0-9a-f]{40}$'; then
-          version="latest"
-        fi
-        install_dir="${RUNNER_TEMP}/zero-bin"
-        mkdir -p "${install_dir}"
-        # Reuse ZERO's own checksum-verifying installer, shipped with the action.
-        ZERO_REPO="${ZERO_REPO}" ZERO_VERSION="${version}" ZERO_INSTALL_DIR="${install_dir}" \
-          bash "${ACTION_PATH}/scripts/install.sh"
-        echo "${install_dir}" >> "${GITHUB_PATH}"
-
-    - name: Run ZERO
-      id: run
-      shell: bash
-      working-directory: ${{ inputs.working-directory }}
-      env:
-        # Secrets are passed via the environment and never echoed. `set +x` and
-        # the absence of any `echo` of these values keep them out of the log.
-        ZERO_INPUT_API_KEY: ${{ inputs.api-key }}
-        ZERO_INPUT_API_KEY_ENV: ${{ inputs.api-key-env }}
-        ZERO_INPUT_PROVIDER: ${{ inputs.provider }}
-        ZERO_INPUT_PROMPT: ${{ inputs.prompt }}
-        ZERO_INPUT_PROMPT_FILE: ${{ inputs.prompt-file }}
-        ZERO_INPUT_MODEL: ${{ inputs.model }}
-        ZERO_INPUT_MODE: ${{ inputs.mode }}
-        ZERO_INPUT_AUTO: ${{ inputs.auto }}
-        ZERO_INPUT_SELF_CORRECT: ${{ inputs.self-correct }}
-        ZERO_INPUT_ADD_DIR: ${{ inputs.add-dir }}
-        ZERO_INPUT_WORKTREE: ${{ inputs.worktree }}
-        ZERO_INPUT_OUTPUT_FORMAT: ${{ inputs.output-format }}
-        ACTION_PATH: ${{ github.action_path }}
-        RUNNER_TEMP: ${{ runner.temp }}
-      run: |
-        set -euo pipefail
-
-        # Export the provider key under the env name the provider expects. This
-        # keeps the action provider-agnostic: no provider->env mapping is baked
-        # in. The value is never printed.
-        if [ -n "${ZERO_INPUT_API_KEY}" ] && [ -n "${ZERO_INPUT_API_KEY_ENV}" ]; then
-          if ! printf '%s' "${ZERO_INPUT_API_KEY_ENV}" | grep -qE '^[A-Za-z_][A-Za-z0-9_]*$'; then
-            echo "::error::api-key-env must be a valid environment variable name." >&2
-            exit 2
-          fi
-          # Export in-process for this Run ZERO step so zero can read it; do
-          # not persist provider credentials to later job steps.
-          export "${ZERO_INPUT_API_KEY_ENV}=${ZERO_INPUT_API_KEY}"
-        fi
-        if [ -n "${ZERO_INPUT_PROVIDER}" ]; then
-          export ZERO_PROVIDER="${ZERO_INPUT_PROVIDER}"
-        fi
-
-        args=(exec)
-
-        if [ -n "${ZERO_INPUT_PROMPT_FILE}" ] && [ -n "${ZERO_INPUT_PROMPT}" ]; then
-          echo "::error::The 'prompt' and 'prompt-file' inputs are mutually exclusive." >&2
-          exit 2
-        fi
-        if [ -n "${ZERO_INPUT_PROMPT_FILE}" ]; then
-          args+=(--file "${ZERO_INPUT_PROMPT_FILE}")
-        elif [ -n "${ZERO_INPUT_PROMPT}" ]; then
-          args+=(--prompt "${ZERO_INPUT_PROMPT}")
-        else
-          echo "::error::Provide either the 'prompt' or 'prompt-file' input." >&2
-          exit 2
-        fi
-
-        [ -n "${ZERO_INPUT_MODEL}" ] && args+=(--model "${ZERO_INPUT_MODEL}")
-        [ -n "${ZERO_INPUT_MODE}" ] && args+=(--mode "${ZERO_INPUT_MODE}")
-        [ -n "${ZERO_INPUT_AUTO}" ] && args+=(--auto "${ZERO_INPUT_AUTO}")
-        [ "${ZERO_INPUT_SELF_CORRECT}" = "true" ] && args+=(--allow-escalation)
-        [ "${ZERO_INPUT_WORKTREE}" = "true" ] && args+=(--worktree)
-        args+=(--output-format "${ZERO_INPUT_OUTPUT_FORMAT}")
-        # No --notify in CI (no terminal); the optional Slack post is handled
-        # separately below so it works regardless of output format.
-        args+=(--no-notify)
-
-        # Split add-dir on newlines and commas; each non-empty entry is a root.
-        if [ -n "${ZERO_INPUT_ADD_DIR}" ]; then
-          while IFS= read -r dir; do
-            # Trim only surrounding whitespace so paths with internal spaces survive.
-            dir="$(printf '%s' "${dir}" | sed 's/^[[:space:]]*//; s/[[:space:]]*$//')"
-            [ -n "${dir}" ] && args+=(--add-dir "${dir}")
-          done < <(printf '%s' "${ZERO_INPUT_ADD_DIR}" | tr ',' '\n')
-        fi
-
-        output_file="${RUNNER_TEMP}/zero-output.txt"
-
-        # Run ZERO. Capture stdout to a file AND echo it to the log. Surface the
-        # real exit code as the step's status. The sandbox is active by default;
-        # this action never enables unsafe permission-skipping.
-        set +e
-        zero "${args[@]}" | tee "${output_file}"
-        code=${PIPESTATUS[0]}
-        set -e
-
-        echo "exit-code=${code}" >> "${GITHUB_OUTPUT}"
-        echo "output-file=${output_file}" >> "${GITHUB_OUTPUT}"
-
-        # Best-effort one-line summary. Structured output ends with lifecycle
-        # metadata, so parse final/error events instead of tailing stdout.
-        summary="$(node "${ACTION_PATH}/scripts/action-summary.mjs" "${ZERO_INPUT_OUTPUT_FORMAT}" "${output_file}" || true)"
-        {
-          echo "summary<<ZERO_EOF"
-          printf '%s\n' "${summary}"
-          echo "ZERO_EOF"
-        } >> "${GITHUB_OUTPUT}"
-
-        exit "${code}"
-
-    - name: Post run summary to pull request
-      if: ${{ always() && inputs.post-to == 'pr-comment' && github.event.pull_request.number != '' }}
-      shell: bash
-      env:
-        GH_TOKEN: ${{ inputs.github-token }}
-        PR_NUMBER: ${{ github.event.pull_request.number }}
-        ZERO_EXIT: ${{ steps.run.outputs.exit-code }}
-        ZERO_SUMMARY: ${{ steps.run.outputs.summary }}
-      run: |
-        set -euo pipefail
-        status="succeeded"
-        [ "${ZERO_EXIT}" != "0" ] && status="failed (exit ${ZERO_EXIT})"
-        body="$(printf 'ZERO run %s.\n\n%s' "${status}" "${ZERO_SUMMARY}")"
-        gh api "repos/${GITHUB_REPOSITORY}/issues/${PR_NUMBER}/comments" \
-          -f body="${body}" >/dev/null
-
-    - name: Post run summary to Slack
-      if: ${{ always() && inputs.post-to == 'slack' && inputs.slack-webhook-url != '' }}
-      shell: bash
-      env:
-        SLACK_WEBHOOK_URL: ${{ inputs.slack-webhook-url }}
-        ZERO_EXIT: ${{ steps.run.outputs.exit-code }}
-        ZERO_SUMMARY: ${{ steps.run.outputs.summary }}
-        RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-      run: |
-        set -euo pipefail
-        status="succeeded"
-        [ "${ZERO_EXIT}" != "0" ] && status="failed (exit ${ZERO_EXIT})"
-        text="ZERO run ${status} for ${GITHUB_REPOSITORY}@${GITHUB_REF_NAME}. ${ZERO_SUMMARY} ${RUN_URL}"
-        # Slack incoming webhooks accept {"text": "..."}; jq escapes the body and
-        # the URL is never echoed. A delivery failure is a warning, not a failure.
-        payload="$(jq -n --arg text "${text}" '{text: $text}')"
-        curl --fail --silent --show-error -X POST -H 'Content-Type: application/json' \
-          -d "${payload}" "${SLACK_WEBHOOK_URL}" >/dev/null || \
-          echo "::warning::Slack webhook delivery failed (run not affected)."

bin/zero.js

@@ -1,342 +1,26 @@
 #!/usr/bin/env node
 
 import { spawnSync } from 'node:child_process';
-import { existsSync, readFileSync, writeSync } from 'node:fs';
-import { createRequire } from 'node:module';
+import { existsSync } from 'node:fs';
 import { dirname, join } from 'node:path';
 import { fileURLToPath } from 'node:url';
 
-const packageRoot = dirname(dirname(fileURLToPath(import.meta.url)));
-
-const CURRENT_PACKAGE_NAME = '@twigpine/zero';
-// The npm package moved from @gitlawb/zero to @twigpine/zero in 0.10.0. That
-// release was also published once under the old name, so 0.9.0's `zero
-// upgrade` and anyone still installing the old name land on a working build
-// that says where the package went (docs/NPM_PACKAGING.md). Nothing is
-// published under the old name after that.
-const LEGACY_PACKAGE_NAME = '@gitlawb/zero';
-
-// The npm name this wrapper was published under, read from its own
-// package.json so the name lives in one place. The platform payload alias and
-// every reinstall hint below derive from it.
-function readPackageName(root) {
-  try {
-    const { name } = JSON.parse(readFileSync(join(root, 'package.json'), 'utf8'));
-    if (typeof name === 'string' && name !== '') return name;
-  } catch {
-    // An unreadable manifest must not stop the CLI from launching.
-  }
-  return CURRENT_PACKAGE_NAME;
-}
-
-const packageName = readPackageName(packageRoot);
-
-// Same note as legacyPackageSwitchMessage in internal/update/installmethod.go.
-// Uninstalling first is the only safe order: both packages own the `zero` bin,
-// so npm refuses to install the new one over the old (EEXIST), and forcing it
-// lets a later uninstall of the old package delete the shared bin.
-function legacyPackageNotice() {
-  return (
-    `[zero] Zero has moved to ${CURRENT_PACKAGE_NAME} on npm, and ${LEGACY_PACKAGE_NAME} gets no further releases.\n` +
-    'To keep getting updates, quit zero and run:\n' +
-    `  npm uninstall -g ${LEGACY_PACKAGE_NAME}\n` +
-    `  npm install -g ${CURRENT_PACKAGE_NAME}\n` +
-    'Uninstall first: both packages provide the `zero` command. With bun, pnpm or yarn, use its global remove and add commands instead.\n'
-  );
-}
-
-// Printed when the wrapper exits rather than before zero starts, because the
-// TUI takes over the screen and would hide anything printed first. Only on a
-// terminal, so scripts that capture stderr see nothing new. `zero update` and
-// `zero upgrade` print the same note themselves.
-if (packageName === LEGACY_PACKAGE_NAME && !['update', 'upgrade'].includes(process.argv[2])) {
-  process.on('exit', () => {
-    if (process.stderr.isTTY || process.env.ZERO_WRAPPER_SIMULATE_TTY === '1') {
-      // Synchronous: an exit handler cannot wait for an asynchronous write.
-      writeSync(2, legacyPackageNotice());
-    }
-  });
-}
-
 function zeroBinaryName(platform = process.platform) {
   return platform === 'win32' ? 'zero.exe' : 'zero';
 }
 
-function helperShimNames(name, platform = process.platform) {
-  if (platform === 'win32') {
-    return [`${name}.cmd`, `${name}.exe`, name];
-  }
-  return [name];
-}
+const packageRoot = dirname(dirname(fileURLToPath(import.meta.url)));
+const nativePath = join(packageRoot, zeroBinaryName());
 
-function commandForShim(path, platform = process.platform) {
-  if (platform === 'win32' && path.toLowerCase().endsWith('.cmd')) {
-    return {
-      command: process.env.ComSpec || 'cmd.exe',
-      prefixArgs: ['/d', '/s', '/c', `"${path.replace(/"/g, '""')}"`],
-    };
-  }
-  return { command: path, prefixArgs: [] };
-}
-
-function resolveHelper(packageRoot, name) {
-  const binDir = join(packageRoot, 'node_modules', '.bin');
-  for (const shimName of helperShimNames(name)) {
-    const candidate = join(binDir, shimName);
-    if (!existsSync(candidate)) continue;
-    return {
-      ...commandForShim(candidate),
-      pathPrepend: [binDir],
-    };
-  }
-  return null;
-}
-
-// Legacy path: helpers installed as npm dependencies of the wrapper. Current
-// installs vendor the helpers inside the platform package instead (a helpers/
-// directory next to the binary, found by the Go side on its own), so this
-// manifest is usually empty — it only matters for a downloaded-binary install
-// whose wrapper still carries helper dependencies.
-function localControlHelperManifest(packageRoot) {
-  const helpers = {};
-  for (const name of ['agent-browser', 'tuistory']) {
-    const helper = resolveHelper(packageRoot, name);
-    if (helper) helpers[name] = helper;
-  }
-  if (Object.keys(helpers).length === 0) return '';
-  return JSON.stringify({ version: 1, helpers });
-}
-
-// Mirrors internal/cli/observability.go parseDoctorArgs + writeDoctorHelp so the
-// wrapper's missing-binary doctor fallback matches the Go doctor CLI surface.
-const DOCTOR_HELP = `Usage:
-  zero doctor [flags]
-
-Runs Go backend health checks for config and provider setup.
-
-Flags:
-      --json            Print JSON report
-      --connectivity    Include provider endpoint connectivity probe when available
-  -h, --help            Show this help
-`;
-
-const EXIT_USAGE = 2;
-
-function installedByBun() {
-  if (process.env.ZERO_WRAPPER_SIMULATE_BUN === '1') {
-    return true;
-  }
-  return process.execPath.includes('bun') || !!process.versions?.bun;
-}
-
-function bunRecoveryParagraph() {
-  return (
-    'You installed with Bun, which does not run dependency lifecycle scripts\n' +
-    'by default. Trust the package to run the blocked postinstall:\n' +
-    `  bun pm trust ${packageName}       (project install)\n` +
-    `  bun pm -g trust ${packageName}    (global install)\n` +
-    'On Bun versions without `bun pm trust`, add\n' +
-    `  "trustedDependencies": ["${packageName}"]\n` +
-    'to your project package.json and reinstall.\n' +
-    '\n'
-  );
-}
-
-function buildFromSourceParagraph() {
-  return (
-    'If this platform has no prebuilt binary, build from source:\n' +
-    'https://github.com/Twigpine/zero (go run ./cmd/zero, requires Go 1.26+).'
-  );
-}
-
-function missingBinaryContextParagraph() {
-  return (
-    `Normally npm installs it as an optional dependency of ${packageName}\n` +
-    `(${packageName}-${process.platform}-${process.arch}), and the wrapper can\n` +
-    'also download it from the GitHub Release when it is missing.'
-  );
-}
-
-function missingNativeRecoveryParagraphs(postinstallScript) {
-  const ranByBun = installedByBun();
-  return (
-    missingBinaryContextParagraph() +
-    '\n' +
-    '\n' +
-    'Things to try:\n' +
-    '  - reinstall without omitting optional dependencies:\n' +
-    `      npm install -g ${packageName}\n` +
-    '  - run the downloader manually (needs write access to the package dir):\n' +
-    `      node "${postinstallScript}"\n` +
-    '\n' +
-    (ranByBun ? bunRecoveryParagraph() : '') +
-    buildFromSourceParagraph()
-  );
-}
-
-function formatGenericMissingNativeBinaryMessage(postinstallScript) {
-  return (
-    '[zero] No native binary is available for this install.\n' +
-    missingNativeRecoveryParagraphs(postinstallScript)
-  );
-}
-
-function parseDoctorArgs(args) {
-  let json = false;
-  for (const arg of args) {
-    switch (arg) {
-      case '-h':
-      case '--help':
-      case 'help':
-        return { kind: 'help' };
-      case '--json':
-        json = true;
-        break;
-      case '--connectivity':
-        break;
-      default:
-        return { kind: 'error', message: `unknown doctor flag ${JSON.stringify(arg)}` };
-    }
-  }
-  return { kind: 'run', json };
-}
-
-function missingNativeDoctorJSONReport(postinstallScript) {
-  return {
-    generatedAt: new Date().toISOString().replace(/\.\d{3}Z$/, 'Z'),
-    ok: false,
-    checks: [
-      {
-        id: 'runtime.go',
-        label: 'Go runtime',
-        status: 'fail',
-        message: 'Native zero binary is missing next to the npm wrapper.',
-        details: {
-          remedy: `node "${postinstallScript}"`,
-        },
-      },
-    ],
-  };
-}
-
-function missingNativeDoctorTextReport(postinstallScript) {
-  return (
-    'Zero doctor report (' +
-    new Date().toISOString() +
-    ')\n' +
-    'Overall: fail\n' +
-    '[fail] runtime.go - Native zero binary is missing next to the npm wrapper.\n' +
-    '  remedy: node "' +
-    postinstallScript +
-    '"\n' +
-    '\n' +
-    missingNativeRecoveryParagraphs(postinstallScript)
-  );
-}
-
-// The platform payload is a version of this same package, installed under an
-// npm: alias (see docs/NPM_PACKAGING.md). The alias name is derived from
-// process.platform/process.arch, so an unsupported platform simply fails to
-// resolve and we fall through to the downloader.
-function platformPackageBinary() {
-  const aliasedName = `${packageName}-${process.platform}-${process.arch}`;
-  let manifestPath;
-  try {
-    manifestPath = createRequire(import.meta.url).resolve(`${aliasedName}/package.json`);
-  } catch {
-    return null;
-  }
-  const candidate = join(dirname(manifestPath), zeroBinaryName());
-  return existsSync(candidate) ? candidate : null;
-}
-
-// Mirrors the release matrix (internal/release/release.go): the platforms a
-// GitHub Release asset exists for. android maps to the linux asset; there is
-// no windows-arm64 asset (Windows on ARM runs the x64 build under emulation).
-function releaseAssetAvailable() {
-  const platform = { linux: 'linux', android: 'linux', darwin: 'macos', win32: 'windows' }[
-    process.platform
-  ];
-  const arch = process.arch === 'x64' || process.arch === 'arm64' ? process.arch : null;
-  if (!platform || !arch) return false;
-  return !(platform === 'windows' && arch === 'arm64');
-}
-
-// Fallback for installs without a platform package (--omit=optional, package
-// managers that skip optionalDependencies): fetch the binary next to the
-// wrapper with the same checksum-verified downloader that used to run as
-// postinstall. Deliberately NOT cached on failure — a transient network error
-// self-heals on the next run — so this retries on every invocation until a
-// binary is in place. Platforms with no release asset skip the attempt.
-function downloadMissingBinary(packageRoot) {
-  const downloadScript = join(packageRoot, 'scripts', 'postinstall.mjs');
-  if (!existsSync(downloadScript) || !releaseAssetAvailable()) return;
+if (!existsSync(nativePath)) {
   console.error(
-    '[zero] no platform package installed — fetching the native binary from the GitHub Release (retried on each run until it succeeds).',
+    '[zero] No native binary found next to the npm wrapper. Reinstall the zero package or run `go run ./cmd/zero-release build` from the repository.'
   );
-  spawnSync(process.execPath, [downloadScript], {
-    stdio: ['ignore', 'inherit', 'inherit'],
-  });
-}
-
-function resolveNativeBinary() {
-  const fromPlatformPackage = platformPackageBinary();
-  if (fromPlatformPackage) return fromPlatformPackage;
-  const downloaded = join(packageRoot, zeroBinaryName());
-  if (existsSync(downloaded)) return downloaded;
-  downloadMissingBinary(packageRoot);
-  return existsSync(downloaded) ? downloaded : null;
-}
-
-const nativePath = resolveNativeBinary();
-
-if (!nativePath) {
-  const postinstallScript = join(packageRoot, 'scripts', 'postinstall.mjs');
-
-  // `zero doctor` is the diagnostic command: when the native binary is missing
-  // it's the one invocation that must NOT bail with the generic wrapper error,
-  // because that's exactly the blind alley issue #405 reports. Instead, surface
-  // a doctor-shaped FAIL line for the runtime so the user's diagnostic finds the
-  // real cause. We branch on a literal 'doctor' subcommand only (matching `zero
-  // doctor` and `zero doctor --connectivity`), preserving the existing bail for
-  // every other invocation (exec, providers list, TUI, --version, etc.).
-  const argv = process.argv.slice(2);
-  const isDoctor = argv.length > 0 && argv[0] === 'doctor';
-  if (isDoctor) {
-    const parsed = parseDoctorArgs(argv.slice(1));
-    if (parsed.kind === 'help') {
-      process.stdout.write(DOCTOR_HELP);
-      process.exit(0);
-    }
-    if (parsed.kind === 'error') {
-      process.stderr.write(`[zero] ${parsed.message}\n`);
-      process.exit(EXIT_USAGE);
-    }
-
-    if (parsed.json) {
-      process.stdout.write(JSON.stringify(missingNativeDoctorJSONReport(postinstallScript), null, 2) + '\n');
-      process.exit(1);
-    }
-
-    process.stdout.write(missingNativeDoctorTextReport(postinstallScript) + '\n');
-    process.exit(1);
-  }
-
-  console.error(formatGenericMissingNativeBinaryMessage(postinstallScript));
   process.exit(1);
 }
 
-const env = { ...process.env };
-const localControlHelpers = localControlHelperManifest(packageRoot);
-if (localControlHelpers) {
-  env.ZERO_LOCAL_CONTROL_HELPERS = localControlHelpers;
-} else {
-  delete env.ZERO_LOCAL_CONTROL_HELPERS;
-}
-
 const child = spawnSync(nativePath, process.argv.slice(2), {
   stdio: 'inherit',
-  env,
 });
 
 if (child.error) {

cmd/zero-linux-sandbox/main.go

@@ -1,13 +0,0 @@
-//go:build linux
-
-package main
-
-import (
-	"os"
-
-	"github.com/Gitlawb/zero/internal/sandbox"
-)
-
-func main() {
-	os.Exit(sandbox.RunLinuxSandboxHelper(os.Args[1:], os.Stderr))
-}

cmd/zero-perf-bench/main.go

@@ -33,15 +33,6 @@ func main() {
 }
 
 func run(args []string, getenv func(string) string, stdout io.Writer, stderr io.Writer) int {
-	// The `tasks` subcommand is the reproducible Terminal-Bench-style task harness;
-	// the default (no subcommand) path stays the cold-start/RSS perf benchmark so
-	// existing invocations are unchanged.
-	if len(args) > 0 && args[0] == "tasks" {
-		return runTasksCommand(args[1:], getenv, stdout, stderr)
-	}
-	if len(args) > 0 && args[0] == "turn" {
-		return runTurnCommand(args[1:], getenv, stdout, stderr)
-	}
 	options, err := parseArgs(args, getenv)
 	if err != nil {
 		_, _ = fmt.Fprintln(stderr, err.Error())
@@ -208,8 +199,6 @@ func parseArgs(args []string, getenv func(string) string) (cliOptions, error) {
 func helpText() string {
 	return strings.Join([]string{
 		"Usage: zero-perf-bench [options]",
-		"       zero-perf-bench tasks [options]   (Terminal-Bench-style task harness; see `tasks --help`)",
-		"       zero-perf-bench turn  [options]   (per-turn tracing benchmark; see `turn --help`)",
 		"",
 		"Options:",
 		"  --iterations <n>             Measured samples to collect (default: 5)",

cmd/zero-perf-bench/main_test.go

@@ -4,8 +4,6 @@ import (
 	"bytes"
 	"strings"
 	"testing"
-
-	"github.com/Gitlawb/zero/internal/perfbench"
 )
 
 func TestParseArgsUsesCliAndEnvOverrides(t *testing.T) {
@@ -94,18 +92,3 @@ func TestHelpText(t *testing.T) {
 func emptyEnv(string) string {
 	return ""
 }
-
-func TestTurnExitCodeFailsWhenEveryTaskErrored(t *testing.T) {
-	var stderr bytes.Buffer
-	allErrored := perfbench.TurnBenchResult{TasksAttempted: 3, TasksErrored: 3}
-	if code := turnExitCode(allErrored, &stderr); code != 1 {
-		t.Fatalf("exit=%d, want 1 when every task errored", code)
-	}
-	if !strings.Contains(stderr.String(), "no accepted benchmark sample") {
-		t.Fatalf("stderr missing explanation: %q", stderr.String())
-	}
-	partial := perfbench.TurnBenchResult{TasksAttempted: 3, TasksErrored: 2}
-	if code := turnExitCode(partial, &stderr); code != 0 {
-		t.Fatalf("exit=%d, want 0 for partial errors (summary surfaces them)", code)
-	}
-}

cmd/zero-perf-bench/tasks.go

@@ -1,218 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"github.com/Gitlawb/zero/internal/perfbench"
-)
-
-// taskOptions configures the `zero-perf-bench tasks` subcommand: the reproducible
-// Terminal-Bench-style harness that runs ZERO headlessly against a task set and
-// records a publishable result (model + commit + self-correct flag + date).
-type taskOptions struct {
-	SuitePath   string
-	Model       string
-	Mode        string
-	SelfCorrect bool
-	Binary      string
-	Version     string
-	Commit      string
-	Output      string
-	JSON        bool
-	DryRun      bool
-	Help        bool
-}
-
-func runTasksCommand(args []string, getenv func(string) string, stdout io.Writer, stderr io.Writer) int {
-	options, err := parseTaskArgs(args, getenv)
-	if err != nil {
-		_, _ = fmt.Fprintln(stderr, err.Error())
-		return 2
-	}
-	if options.Help {
-		_, _ = fmt.Fprint(stdout, taskHelpText())
-		return 0
-	}
-
-	set, err := perfbench.LoadTaskSet(options.SuitePath)
-	if err != nil {
-		_, _ = fmt.Fprintln(stderr, "[zero] Task benchmark failed: "+err.Error())
-		return 1
-	}
-
-	runner := perfbench.SkipRunner
-	if !options.DryRun {
-		binary := strings.TrimSpace(options.Binary)
-		if binary == "" {
-			_, _ = fmt.Fprintln(stderr, "[zero] Task benchmark failed: --binary is required unless --dry-run is set")
-			return 2
-		}
-		runner = perfbench.NewExecRunner(binary)
-	}
-
-	result, err := perfbench.RunTasks(context.Background(), set, perfbench.TaskConfig{
-		Model:       options.Model,
-		Mode:        options.Mode,
-		SelfCorrect: options.SelfCorrect,
-		Version:     options.Version,
-		Commit:      options.Commit,
-		Runner:      runner,
-	})
-	if err != nil {
-		_, _ = fmt.Fprintln(stderr, "[zero] Task benchmark failed: "+err.Error())
-		return 1
-	}
-
-	if options.Output != "" {
-		if err := writeTaskReport(options.Output, result); err != nil {
-			_, _ = fmt.Fprintln(stderr, "[zero] Task benchmark failed: "+err.Error())
-			return 1
-		}
-	}
-	if options.JSON {
-		if err := perfbench.WriteTaskJSON(stdout, result); err != nil {
-			_, _ = fmt.Fprintln(stderr, "[zero] Task benchmark failed: "+err.Error())
-			return 1
-		}
-		return 0
-	}
-	_, _ = fmt.Fprintln(stdout, perfbench.FormatTaskSummary(result))
-	return 0
-}
-
-func parseTaskArgs(args []string, getenv func(string) string) (taskOptions, error) {
-	options := taskOptions{
-		Version: strings.TrimSpace(getenv("ZERO_BENCH_VERSION")),
-		Commit:  strings.TrimSpace(getenv("ZERO_BENCH_COMMIT")),
-	}
-	for index := 0; index < len(args); index++ {
-		arg := args[index]
-		flag, inlineValue := splitFlagValue(arg)
-		switch flag {
-		case "--suite":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.SuitePath = value
-			index = next
-		case "--model":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Model = value
-			index = next
-		case "--mode":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Mode = value
-			index = next
-		case "--binary":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Binary = value
-			index = next
-		case "--version":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Version = value
-			index = next
-		case "--commit":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Commit = value
-			index = next
-		case "--output":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Output = value
-			index = next
-		case "--self-correct":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.SelfCorrect = true
-		case "--json":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.JSON = true
-		case "--dry-run":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.DryRun = true
-		case "-h", "--help":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.Help = true
-		default:
-			return options, fmt.Errorf("unknown option: %s", arg)
-		}
-	}
-	if options.Help {
-		return options, nil
-	}
-	if strings.TrimSpace(options.SuitePath) == "" {
-		return options, fmt.Errorf("--suite is required")
-	}
-	if strings.TrimSpace(options.Model) == "" {
-		return options, fmt.Errorf("--model is required")
-	}
-	return options, nil
-}
-
-func writeTaskReport(path string, result perfbench.TaskRunResult) error {
-	if dir := filepath.Dir(path); dir != "" {
-		if err := os.MkdirAll(dir, 0o755); err != nil {
-			return err
-		}
-	}
-	var buffer bytes.Buffer
-	if err := perfbench.WriteTaskJSON(&buffer, result); err != nil {
-		return err
-	}
-	return os.WriteFile(path, buffer.Bytes(), 0o644)
-}
-
-func taskHelpText() string {
-	return strings.Join([]string{
-		"Usage: zero-perf-bench tasks [options]",
-		"",
-		"Runs ZERO headlessly against a Terminal-Bench-style task set and records a",
-		"reproducible, publishable result (model + commit + self-correct flag + date).",
-		"",
-		"Options:",
-		"  --suite <path>      Task set JSON file (required)",
-		"  --model <model>     Model to run (required); recorded with the result",
-		"  --mode <name>       Exec mode preset to apply",
-		"  --self-correct      Enable the post-edit verify-and-correct loop",
-		"  --binary <path>     Path to the `zero` binary (required unless --dry-run)",
-		"  --version <v>       Record the ZERO version (default: $ZERO_BENCH_VERSION)",
-		"  --commit <sha>      Record the ZERO commit (default: $ZERO_BENCH_COMMIT)",
-		"  --output <path>     Write the JSON result to path",
-		"  --json              Print only the JSON result",
-		"  --dry-run           Record every task as skipped without invoking the agent",
-		"  -h, --help          Show this help",
-		"",
-		"Run twice — with and without --self-correct — to publish the delta.",
-	}, "\n") + "\n"
-}

cmd/zero-perf-bench/tasks_test.go

@@ -1,170 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"encoding/json"
-	"os"
-	"path/filepath"
-	"strings"
-	"testing"
-)
-
-func writeTaskSuite(t *testing.T, body string) string {
-	t.Helper()
-	dir := t.TempDir()
-	path := filepath.Join(dir, "suite.json")
-	if err := os.WriteFile(path, []byte(body), 0o600); err != nil {
-		t.Fatalf("write suite: %v", err)
-	}
-	return path
-}
-
-func TestParseTaskArgsRequiresSuiteAndModel(t *testing.T) {
-	if _, err := parseTaskArgs([]string{"--model", "m"}, emptyEnv); err == nil || !strings.Contains(err.Error(), "--suite") {
-		t.Fatalf("expected missing-suite error, got %v", err)
-	}
-	if _, err := parseTaskArgs([]string{"--suite", "/x.json"}, emptyEnv); err == nil || !strings.Contains(err.Error(), "--model") {
-		t.Fatalf("expected missing-model error, got %v", err)
-	}
-}
-
-func TestParseTaskArgsReadsFlagsAndEnv(t *testing.T) {
-	env := func(key string) string {
-		return map[string]string{
-			"ZERO_BENCH_COMMIT":  "deadbeef",
-			"ZERO_BENCH_VERSION": "9.9.9",
-		}[key]
-	}
-	options, err := parseTaskArgs([]string{
-		"--suite", "/tmp/suite.json",
-		"--model", "test-model",
-		"--mode", "build",
-		"--self-correct",
-		"--binary", "/usr/local/bin/zero",
-		"--output", "dist/bench.json",
-		"--json",
-	}, env)
-	if err != nil {
-		t.Fatalf("parseTaskArgs error: %v", err)
-	}
-	if options.SuitePath != "/tmp/suite.json" || options.Model != "test-model" || options.Mode != "build" {
-		t.Fatalf("options = %#v", options)
-	}
-	if !options.SelfCorrect || !options.JSON {
-		t.Fatalf("flags not parsed: %#v", options)
-	}
-	if options.Binary != "/usr/local/bin/zero" || options.Output != "dist/bench.json" {
-		t.Fatalf("binary/output = %q/%q", options.Binary, options.Output)
-	}
-	if options.Commit != "deadbeef" || options.Version != "9.9.9" {
-		t.Fatalf("commit/version from env = %q/%q", options.Commit, options.Version)
-	}
-}
-
-func TestParseTaskArgsFlagsOverrideEnv(t *testing.T) {
-	env := func(key string) string {
-		return map[string]string{"ZERO_BENCH_COMMIT": "fromenv"}[key]
-	}
-	options, err := parseTaskArgs([]string{"--suite", "/s.json", "--model", "m", "--commit", "fromflag"}, env)
-	if err != nil {
-		t.Fatalf("parseTaskArgs error: %v", err)
-	}
-	if options.Commit != "fromflag" {
-		t.Fatalf("commit = %q, want fromflag (flag overrides env)", options.Commit)
-	}
-}
-
-func TestRunTasksCommandWritesRecordWithoutBinary(t *testing.T) {
-	// With --dry-run no agent is invoked: every task is recorded as skipped. This
-	// exercises the full record path (model + commit + self-correct flag) without
-	// needing a real zero binary or model.
-	suite := writeTaskSuite(t, `{
-		"id": "terminal-bench-mini",
-		"name": "Terminal-Bench (mini)",
-		"tasks": [
-			{"id": "t1", "name": "fix", "prompt": "do the thing"},
-			{"id": "t2", "name": "flag", "prompt": "add a flag"}
-		]
-	}`)
-	outPath := filepath.Join(t.TempDir(), "bench.json")
-
-	var stdout, stderr bytes.Buffer
-	code := runTasksCommand([]string{
-		"--suite", suite,
-		"--model", "test-model",
-		"--self-correct",
-		"--commit", "abc1234",
-		"--version", "1.2.3",
-		"--dry-run",
-		"--output", outPath,
-	}, emptyEnv, &stdout, &stderr)
-	if code != 0 {
-		t.Fatalf("runTasksCommand code = %d, stderr = %q", code, stderr.String())
-	}
-
-	data, err := os.ReadFile(outPath)
-	if err != nil {
-		t.Fatalf("read output: %v", err)
-	}
-	var record struct {
-		Model       string `json:"model"`
-		Commit      string `json:"commit"`
-		SelfCorrect bool   `json:"selfCorrect"`
-		Suite       string `json:"suite"`
-		Attempted   int    `json:"tasksAttempted"`
-	}
-	if err := json.Unmarshal(data, &record); err != nil {
-		t.Fatalf("decode record: %v\n%s", err, data)
-	}
-	if record.Model != "test-model" || record.Commit != "abc1234" || !record.SelfCorrect {
-		t.Fatalf("record = %#v", record)
-	}
-	if record.Suite != "terminal-bench-mini" || record.Attempted != 2 {
-		t.Fatalf("record suite/attempted = %q/%d", record.Suite, record.Attempted)
-	}
-	if !strings.Contains(stdout.String(), "self-correct: on") {
-		t.Fatalf("summary missing self-correct line:\n%s", stdout.String())
-	}
-}
-
-func TestRunTasksCommandRejectsMissingSuiteFile(t *testing.T) {
-	var stdout, stderr bytes.Buffer
-	code := runTasksCommand([]string{"--suite", "/no/such/suite.json", "--model", "m", "--dry-run"}, emptyEnv, &stdout, &stderr)
-	if code == 0 {
-		t.Fatalf("expected non-zero exit for missing suite file")
-	}
-	if stderr.Len() == 0 {
-		t.Fatalf("expected an error message on stderr")
-	}
-}
-
-func TestSampleTaskSuiteIsValidAndRunnableDry(t *testing.T) {
-	// The published example suite (referenced by docs/BENCHMARK.md) must load and
-	// dry-run cleanly so the documented command never bit-rots.
-	outPath := filepath.Join(t.TempDir(), "bench.json")
-	var stdout, stderr bytes.Buffer
-	code := runTasksCommand([]string{
-		"--suite", filepath.Join("testdata", "terminal-bench-sample.json"),
-		"--model", "example-model",
-		"--dry-run",
-		"--output", outPath,
-	}, emptyEnv, &stdout, &stderr)
-	if code != 0 {
-		t.Fatalf("sample suite dry run code = %d, stderr = %q", code, stderr.String())
-	}
-	if !strings.Contains(stdout.String(), "terminal-bench-sample") {
-		t.Fatalf("summary should name the suite:\n%s", stdout.String())
-	}
-}
-
-func TestTasksSubcommandRoutedFromMain(t *testing.T) {
-	var stdout, stderr bytes.Buffer
-	// "tasks --help" must route to the task harness help, not the perf-bench flags.
-	code := run([]string{"tasks", "--help"}, emptyEnv, &stdout, &stderr)
-	if code != 0 {
-		t.Fatalf("run tasks --help code = %d stderr = %q", code, stderr.String())
-	}
-	if !strings.Contains(stdout.String(), "zero-perf-bench tasks") {
-		t.Fatalf("tasks help missing usage:\n%s", stdout.String())
-	}
-}

cmd/zero-perf-bench/testdata/terminal-bench-sample.json

@@ -1,20 +0,0 @@
-{
-  "id": "terminal-bench-sample",
-  "name": "Terminal-Bench (sample)",
-  "tasks": [
-    {
-      "id": "hello-fix",
-      "name": "make the failing test pass",
-      "prompt": "The test in ./hello fails. Fix the implementation so `go test ./...` passes.",
-      "workspaceFixture": "./hello",
-      "verificationCommand": ["go", "test", "./..."]
-    },
-    {
-      "id": "add-json-flag",
-      "name": "add a --json flag",
-      "prompt": "Add a --json flag to the CLI that prints the result as JSON, and a test for it.",
-      "workspaceFixture": "./cli",
-      "verificationCommand": ["go", "test", "./..."]
-    }
-  ]
-}

cmd/zero-perf-bench/turn.go

@@ -1,279 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"github.com/Gitlawb/zero/internal/execprofile"
-	"github.com/Gitlawb/zero/internal/perfbench"
-)
-
-// turnOptions configures the `zero-perf-bench turn` subcommand: the per-turn
-// benchmark harness that runs ZERO headlessly with --trace, parses each turn's
-// NDJSON trace, and records per-span latency plus the top controllable latency
-// sources — the Phase 0 baseline's "do not proceed until" criterion.
-type turnOptions struct {
-	SuitePath   string
-	Model       string
-	Mode        string
-	ExecProfile string
-	SelfCorrect bool
-	Binary      string
-	Iterations  int
-	Version     string
-	Commit      string
-	Output      string
-	JSON        bool
-	DryRun      bool
-	Help        bool
-}
-
-func runTurnCommand(args []string, getenv func(string) string, stdout io.Writer, stderr io.Writer) int {
-	options, err := parseTurnArgs(args, getenv)
-	if err != nil {
-		_, _ = fmt.Fprintln(stderr, err.Error())
-		return 2
-	}
-	if options.Help {
-		_, _ = fmt.Fprint(stdout, turnHelpText())
-		return 0
-	}
-
-	set, err := perfbench.LoadTaskSet(options.SuitePath)
-	if err != nil {
-		_, _ = fmt.Fprintln(stderr, "[zero] Turn benchmark failed: "+err.Error())
-		return 1
-	}
-
-	// The dry-run path records a zero-iteration run without a binary, so the
-	// manifest loads and the report path is exercised in CI without a model.
-	if options.DryRun {
-		_, _ = fmt.Fprintln(stdout, "[zero] turn benchmark: dry run (no agent invoked)")
-		return 0
-	}
-
-	binary, err := perfbench.ResolveBinary(options.Binary)
-	if err != nil {
-		_, _ = fmt.Fprintln(stderr, "[zero] Turn benchmark failed: "+err.Error())
-		return 2
-	}
-
-	result, err := perfbench.RunTurnBench(context.Background(), set, perfbench.TurnBenchConfig{
-		Model:       options.Model,
-		Mode:        options.Mode,
-		ExecProfile: options.ExecProfile,
-		SelfCorrect: options.SelfCorrect,
-		Version:     options.Version,
-		Commit:      options.Commit,
-		Iterations:  options.Iterations,
-		Runner:      perfbench.NewTurnExecRunner(binary),
-	})
-	if err != nil {
-		_, _ = fmt.Fprintln(stderr, "[zero] Turn benchmark failed: "+err.Error())
-		return 1
-	}
-
-	if options.Output != "" {
-		if err := writeTurnReport(options.Output, result); err != nil {
-			_, _ = fmt.Fprintln(stderr, "[zero] Turn benchmark failed: "+err.Error())
-			return 1
-		}
-	}
-	if options.JSON {
-		if err := perfbench.WriteTurnBenchJSON(stdout, result); err != nil {
-			_, _ = fmt.Fprintln(stderr, "[zero] Turn benchmark failed: "+err.Error())
-			return 1
-		}
-		return turnExitCode(result, stderr)
-	}
-	_, _ = fmt.Fprintln(stdout, perfbench.FormatTurnBenchSummary(result))
-	return turnExitCode(result, stderr)
-}
-
-// turnExitCode fails the command when every attempted task errored (no
-// iteration produced an accepted benchmark sample): such a report measures
-// nothing, and exiting 0 would let a broken configuration (missing binary, bad
-// path, failing harness step) pass as a clean baseline. Partial errors keep
-// exit 0 — the summary surfaces them loudly and the surviving samples are
-// still valid measurements.
-func turnExitCode(result perfbench.TurnBenchResult, stderr io.Writer) int {
-	if result.TasksAttempted > 0 && result.TasksErrored == result.TasksAttempted {
-		_, _ = fmt.Fprintln(stderr, "[zero] Turn benchmark failed: every task errored with no accepted benchmark sample (see warnings); the report contains no valid measurements")
-		return 1
-	}
-	return 0
-}
-
-func parseTurnArgs(args []string, getenv func(string) string) (turnOptions, error) {
-	options := turnOptions{
-		Iterations: 1,
-		Version:    strings.TrimSpace(getenv("ZERO_BENCH_VERSION")),
-		Commit:     strings.TrimSpace(getenv("ZERO_BENCH_COMMIT")),
-	}
-	for index := 0; index < len(args); index++ {
-		arg := args[index]
-		flag, inlineValue := splitFlagValue(arg)
-		switch flag {
-		case "--suite":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.SuitePath = value
-			index = next
-		case "--model":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Model = value
-			index = next
-		case "--mode":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Mode = value
-			index = next
-		case "--exec-profile":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.ExecProfile = value
-			index = next
-		case "--binary":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Binary = value
-			index = next
-		case "--iterations":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			parsed, err := parsePositiveInteger(flag, value)
-			if err != nil {
-				return options, err
-			}
-			options.Iterations = parsed
-			index = next
-		case "--version":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Version = value
-			index = next
-		case "--commit":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Commit = value
-			index = next
-		case "--output":
-			value, next, err := readOptionValue(args, inlineValue, index, flag)
-			if err != nil {
-				return options, err
-			}
-			options.Output = value
-			index = next
-		case "--self-correct":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.SelfCorrect = true
-		case "--json":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.JSON = true
-		case "--dry-run":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.DryRun = true
-		case "-h", "--help":
-			if strings.Contains(arg, "=") {
-				return options, fmt.Errorf("%s does not accept a value", flag)
-			}
-			options.Help = true
-		default:
-			return options, fmt.Errorf("unknown option: %s", arg)
-		}
-	}
-	if options.Help {
-		return options, nil
-	}
-	if strings.TrimSpace(options.SuitePath) == "" {
-		return options, fmt.Errorf("--suite is required")
-	}
-	if strings.TrimSpace(options.Model) == "" && !options.DryRun {
-		return options, fmt.Errorf("--model is required (or pass --dry-run)")
-	}
-	// Validate the profile here, before anything spawns: an unknown name would
-	// otherwise make every child exit with a usage error in milliseconds, and
-	// those near-zero walls would be recorded as valid latency samples in an
-	// exit-0 report — exactly the misread-as-improvement trap the harness
-	// closed for spawn failures. Normalizing to the catalog name also keeps
-	// the stamped execProfile canonical (Lookup is case-insensitive), so two
-	// captures of the same posture always compare equal.
-	if raw := strings.TrimSpace(options.ExecProfile); raw != "" {
-		profile, ok := execprofile.Lookup(raw)
-		if !ok {
-			return options, fmt.Errorf("unknown execution profile %q for --exec-profile. Valid profiles: %s", raw, strings.Join(execprofile.Names(), ", "))
-		}
-		options.ExecProfile = profile.Name
-	}
-	return options, nil
-}
-
-func writeTurnReport(path string, result perfbench.TurnBenchResult) error {
-	if dir := filepath.Dir(path); dir != "" {
-		if err := os.MkdirAll(dir, 0o755); err != nil {
-			return err
-		}
-	}
-	var buffer bytes.Buffer
-	if err := perfbench.WriteTurnBenchJSON(&buffer, result); err != nil {
-		return err
-	}
-	return os.WriteFile(path, buffer.Bytes(), 0o644)
-}
-
-func turnHelpText() string {
-	return strings.Join([]string{
-		"Usage: zero-perf-bench turn [options]",
-		"",
-		"Runs ZERO headlessly with --trace against a per-turn benchmark task set and",
-		"records per-span latency plus the top controllable latency sources (the",
-		"Phase 0 baseline's \"do not proceed until\" criterion). Each task is a fresh",
-		"`zero exec` process, so iterations are cold-start samples; a warm path needs",
-		"an in-process runner (future work).",
-		"",
-		"Options:",
-		"  --suite <path>      Task set JSON file (required)",
-		"  --model <model>     Model to run (required unless --dry-run)",
-		"  --mode <name>       Exec mode preset to apply",
-		"  --exec-profile <name>",
-		"                      Execution profile for every task (fast|balanced|thorough);",
-		"                      forwarded to zero exec and stamped into the result",
-		"  --self-correct      Enable the post-edit verify-and-correct loop",
-		"  --binary <path>     Path to the `zero` binary (default: zero on PATH / repo root)",
-		"  --iterations <n>    Times to run each task (default: 1)",
-		"  --version <v>       Record the ZERO version (default: $ZERO_BENCH_VERSION)",
-		"  --commit <sha>      Record the ZERO commit (default: $ZERO_BENCH_COMMIT)",
-		"  --output <path>     Write the JSON result to path",
-		"  --json              Print only the JSON result",
-		"  --dry-run           Load the manifest and exit without invoking the agent",
-		"  -h, --help          Show this help",
-	}, "\n") + "\n"
-}

cmd/zero-perf-bench/turn_test.go

@@ -1,65 +0,0 @@
-package main
-
-import (
-	"strings"
-	"testing"
-)
-
-func TestParseTurnArgsExecProfile(t *testing.T) {
-	getenv := func(string) string { return "" }
-	options, err := parseTurnArgs([]string{
-		"--suite", "suite.json",
-		"--model", "m",
-		"--exec-profile", "fast",
-	}, getenv)
-	if err != nil {
-		t.Fatalf("parseTurnArgs: %v", err)
-	}
-	if options.ExecProfile != "fast" {
-		t.Fatalf("ExecProfile = %q, want fast", options.ExecProfile)
-	}
-
-	// Inline form.
-	options, err = parseTurnArgs([]string{
-		"--suite=suite.json",
-		"--model=m",
-		"--exec-profile=thorough",
-	}, getenv)
-	if err != nil {
-		t.Fatalf("parseTurnArgs inline: %v", err)
-	}
-	if options.ExecProfile != "thorough" {
-		t.Fatalf("ExecProfile = %q, want thorough", options.ExecProfile)
-	}
-}
-
-// The bench validates the profile BEFORE spawning anything: an unknown name
-// would otherwise make every child exit with a usage error in milliseconds
-// and record those near-zero walls as valid latency samples in an exit-0
-// report. Lookup normalization also keeps the stamped name canonical so two
-// captures of the same posture compare equal.
-func TestParseTurnArgsExecProfileValidatesAndNormalizes(t *testing.T) {
-	getenv := func(string) string { return "" }
-
-	options, err := parseTurnArgs([]string{
-		"--suite", "suite.json", "--model", "m", "--exec-profile", "FAST",
-	}, getenv)
-	if err != nil {
-		t.Fatalf("parseTurnArgs: %v", err)
-	}
-	if options.ExecProfile != "fast" {
-		t.Fatalf("ExecProfile = %q, want the canonical fast", options.ExecProfile)
-	}
-
-	_, err = parseTurnArgs([]string{
-		"--suite", "suite.json", "--model", "m", "--exec-profile", "blanced",
-	}, getenv)
-	if err == nil {
-		t.Fatal("an unknown profile must fail parse, before anything spawns")
-	}
-	for _, name := range []string{"balanced", "fast", "thorough"} {
-		if !strings.Contains(err.Error(), name) {
-			t.Fatalf("error must list %q, got %q", name, err.Error())
-		}
-	}
-}

cmd/zero-seccomp/main.go

@@ -1,35 +0,0 @@
-//go:build linux
-
-// Command zero-seccomp is retained as a compatibility wrapper for existing Linux
-// installs and scripts. The main sandbox path now applies the same optional
-// Unix-socket filter inside zero-linux-sandbox when sandbox.blockUnixSockets is
-// enabled.
-package main
-
-import (
-	"fmt"
-	"os"
-	"os/exec"
-	"syscall"
-
-	"github.com/Gitlawb/zero/internal/sandbox"
-)
-
-func main() {
-	if len(os.Args) < 2 {
-		fmt.Fprintln(os.Stderr, "usage: zero-seccomp <command> [args...]")
-		os.Exit(2)
-	}
-	if err := sandbox.ApplyUnixSocketBlock(); err != nil {
-		fmt.Fprintln(os.Stderr, "zero-seccomp: warning: "+err.Error()+"; running without the Unix-socket filter")
-	}
-	binary, err := exec.LookPath(os.Args[1])
-	if err != nil {
-		fmt.Fprintln(os.Stderr, "zero-seccomp: "+err.Error())
-		os.Exit(127)
-	}
-	if err := syscall.Exec(binary, os.Args[1:], os.Environ()); err != nil {
-		fmt.Fprintln(os.Stderr, "zero-seccomp: exec failed: "+err.Error())
-		os.Exit(126)
-	}
-}

cmd/zero-seccomp/main_unsupported.go

@@ -1,13 +0,0 @@
-//go:build !linux
-
-package main
-
-import (
-	"fmt"
-	"os"
-)
-
-func main() {
-	fmt.Fprintln(os.Stderr, "zero-seccomp is only supported on Linux")
-	os.Exit(2)
-}

cmd/zero-windows-command-runner/main.go

@@ -1,11 +0,0 @@
-package main
-
-import (
-	"os"
-
-	"github.com/Gitlawb/zero/internal/sandbox"
-)
-
-func main() {
-	os.Exit(sandbox.RunWindowsSandboxCommandRunner(os.Args[1:], os.Stderr))
-}

cmd/zero-windows-sandbox-setup/main.go

@@ -1,11 +0,0 @@
-package main
-
-import (
-	"os"
-
-	"github.com/Gitlawb/zero/internal/sandbox"
-)
-
-func main() {
-	os.Exit(sandbox.RunWindowsSandboxSetup(os.Args[1:], os.Stderr))
-}

docs/AGENT_EVALS.md

@@ -1,279 +0,0 @@
-# Offline Agent Evals
-
-Zero agent evals are maintainer fixtures for checking coding-agent behavior
-without calling a live model. They describe a task, the files the agent is
-expected to change, the commands that should verify the result, and the scoring
-rules an offline harness can apply to a captured run.
-
-These fixtures are intentionally local-first. They do not prove provider quality
-or live model execution by themselves; they give tests and CLI workflows a
-stable sample suite to validate, run against copied workspaces, and score from
-saved outputs. The eval harness is local and offline-testable. It only makes
-live model calls when the supplied agent command does.
-
-## Suite Format
-
-Sample suites live under `internal/agenteval/testdata/`. Tiny fixture
-workspaces live under `internal/agenteval/testdata/fixtures/`.
-
-Each suite JSON file contains:
-
-- `id`: stable suite identifier for filters and reports.
-- `name` and `description`: maintainer-facing suite metadata.
-- `tasks`: coding-agent tasks with prompts, file expectations, verification
-  commands, and offline scoring inputs.
-
-Task fields used by the sample suite:
-
-- `id`: stable task identifier for filters and reports.
-- `name` and `description`: short task metadata.
-- `tags`: stable category labels such as `docs`, `go`, or `wrapper`.
-- `difficulty`: a coarse task size such as `easy`, `medium`, or `hard`.
-- `prompt`: the user request to give an agent.
-- `workspaceFixture`: the fixture workspace to copy before running the task.
-- `expectedChangedFiles`: files that should change for a complete solution.
-- `forbiddenChangedFiles`: files that must not change during the task.
-- `requiredTraceEvents`: JSONL agent events that must appear in benchmark
-  stdout.
-- `contextChecks`: required and forbidden files checked in the materialized
-  workspace before verification commands run.
-- `verificationCommands`: commands a maintainer or harness can run after the
-  agent output is applied.
-
-The scoring contract matches command results by `verificationCommands[].id`,
-compares changed files against `expectedChangedFiles`, rejects any
-`forbiddenChangedFiles`, checks the materialized workspace with `contextChecks`,
-and can require agent trace events during benchmark runs. The loader rejects
-unknown JSON fields so suite changes fail fast.
-
-Example richer task rubric:
-
-```json
-{
-  "tags": ["docs", "jsonl"],
-  "difficulty": "easy",
-  "forbiddenChangedFiles": ["go.mod", "package.json"],
-  "requiredTraceEvents": ["tool:read_file", "verify:go-test"],
-  "contextChecks": {
-    "requiredFiles": ["docs/STREAM_JSON_PROTOCOL.md"],
-    "forbiddenFiles": ["node_modules/cache.txt"]
-  }
-}
-```
-
-## Modes
-
-### Validate Mode
-
-`zero eval` defaults to `validate` mode. In validate mode, the command performs
-schema and contract checks only: it parses the suite, rejects invalid task
-definitions, and reports the number of tasks and checks. It does not copy
-fixtures, invoke an agent, score a workspace, or execute verification commands.
-
-```bash
-go run ./cmd/zero eval --suite internal/agenteval/testdata/sample_suite.json
-```
-
-Use JSON output when another local tool needs the validation summary:
-
-```bash
-go run ./cmd/zero eval --suite internal/agenteval/testdata/sample_suite.json --json
-```
-
-### Run Mode
-
-`zero eval run` scores one already-mutated Git workspace. It does not copy
-fixtures or invoke an agent; point it at a Git worktree where a fixture has
-already been copied, initialized, and attempted by an agent or deterministic
-local script. The runner executes each `verificationCommands` entry, collects
-changed files with `git status --porcelain`, and emits the task-success report
-contract below. `--workspace` is required: it must point at the prepared fixture
-worktree, never the current directory, so the suite's verification commands
-(`go test`, `git`, ...) don't run against your real repo.
-
-```bash
-go run ./cmd/zero eval run \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --task document-stream-json-verify-events \
-  --workspace /tmp/zero-eval-workspace
-```
-
-Persist the report for comparison between prompt or model changes:
-
-```bash
-go run ./cmd/zero eval run \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --task document-stream-json-verify-events \
-  --workspace /tmp/zero-eval-workspace \
-  --report-dir /tmp/zero-eval-report \
-  --json
-```
-
-### Bench Mode
-
-`zero eval bench` runs the full benchmark harness for one task or a suite. Bench
-mode copies each task fixture into `--work-root`, initializes a clean Git
-baseline, runs the supplied `--agent-command` in that workspace, then scores the
-result with the same scorer used by run mode.
-
-Agent commands are passed as argv, without shell interpolation. The harness
-expands these placeholders in each argument:
-
-- `{workspace}`: copied task workspace path.
-- `{prompt}`: task prompt from the suite.
-- `{task_id}`: selected task ID.
-- `{model}`: current model ID for model-matrix benchmark runs.
-
-Use `--model <id>` more than once, or `--models a,b,c`, to run the same task
-matrix across several models. When no model is supplied, the harness preserves
-the previous single-run behavior and `{model}` expands to an empty string.
-
-Example using a real local agent command:
-
-```bash
-go run ./cmd/zero eval bench \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --task document-stream-json-verify-events \
-  --work-root /tmp/zero-evals \
-  --agent-command zero exec --cwd {workspace} {prompt}
-```
-
-Example with model selection:
-
-```bash
-go run ./cmd/zero eval bench \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --task document-stream-json-verify-events \
-  --work-root /tmp/zero-evals \
-  --model gpt-5 \
-  --agent-command zero exec --model {model} --cwd {workspace} {prompt}
-```
-
-Include `{task_id}` when the agent wrapper needs stable per-task logging,
-branching, or fixture-specific behavior:
-
-```bash
-go run ./cmd/zero eval bench \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --work-root /tmp/zero-evals \
-  --agent-command zero-agent-wrapper --task {task_id} --workspace {workspace} --prompt {prompt}
-```
-
-The same wrapper can emit JSONL trace events to stdout for future trace scoring:
-
-```json
-{"type":"tool","name":"read_file"}
-{"event":"verify","name":"go-test"}
-```
-
-Those events are required by adding keys such as `tool:read_file` and
-`verify:go-test` to `requiredTraceEvents`.
-
-For deterministic offline testing, point `--agent-command` at a local script
-that edits the copied workspace without calling a model:
-
-```bash
-go run ./cmd/zero eval bench \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --task document-stream-json-verify-events \
-  --work-root /tmp/zero-evals \
-  --agent-command ./scripts/fake-agent --workspace {workspace} --task {task_id} --prompt {prompt}
-```
-
-Bound a benchmark run with `--timeout` (a Go duration) so a wedged or
-interactive agent cannot block the harness forever. The timeout applies per
-task and cancels materialization, the agent process, and scoring:
-
-```bash
-go run ./cmd/zero eval bench \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --task document-stream-json-verify-events \
-  --work-root /tmp/zero-evals \
-  --timeout 5m \
-  --agent-command ./scripts/fake-agent --workspace {workspace} --prompt {prompt}
-```
-
-Use `--report-dir` to persist the CLI report artifact. The file is always named
-`agent-eval-report.json`; with bench mode it records the suite status, task
-counts, pass/fail totals, failures, and the nested benchmark report with each
-task/model run. Use `--keep-workspaces` when you also need to inspect the
-materialized workspaces after the run:
-
-```bash
-go run ./cmd/zero eval bench \
-  --suite internal/agenteval/testdata/sample_suite.json \
-  --task add-npm-wrapper-argv-helper \
-  --work-root /tmp/zero-evals \
-  --keep-workspaces \
-  --report-dir /tmp/zero-eval-report \
-  --json \
-  --agent-command ./scripts/fake-agent --workspace {workspace} --task {task_id} --prompt {prompt}
-```
-
-**Scoring caveat:** changed-file scoring inspects the workspace with
-`git status --porcelain` against the baseline commit. An agent that *commits*
-its own changes (or otherwise leaves a clean working tree) defeats this check —
-the committed edits no longer appear as changed files, so `expectedChangedFiles`
-will not match. Agents under bench should leave their edits uncommitted.
-
-Run the package tests when changing the suite schema or scorer:
-
-```bash
-go test ./internal/agenteval
-```
-
-For a faster manual fixture check:
-
-```bash
-go test ./internal/verify ./internal/selfverify
-```
-
-Or parse the JSON directly with any strict JSON parser. For example:
-
-```bash
-python -m json.tool internal/agenteval/testdata/sample_suite.json
-```
-
-The `internal/agenteval` tests load every JSON file under
-`internal/agenteval/testdata/` and reject missing task IDs, empty verification
-commands, and malformed changed-file expectations.
-
-## Report JSON
-
-Scored reports use contract `zero.agenteval.report.v1`.
-
-- `suiteId` and `taskId`: identify the suite and selected task.
-- `status`: overall `pass`, `fail`, `blocked`, or `error`.
-- `ok`: true only when every result passes.
-- `summary`: total result counts by status.
-- `changedFiles`: normalized files collected from the workspace.
-- `results`: one result per verification command, plus configured
-  `changed_files`, `forbidden_changed_files`, `context_checks`, and
-  `trace_events` checks.
-- `error`: task-selection or report-level error, when present.
-
-Command results include the command ID, display name, command argv, status,
-exit code, stdout, stderr, and an optional message. File-based results include
-expected, actual, missing, and unexpected files. Trace results include expected,
-actual, and missing event keys.
-
-## Score Interpretation
-
-Scores are offline quality signals, not pass/fail release gates by default. The
-statuses below are produced when a harness supplies captured command results and
-changed files.
-
-- `pass`: every verification command exited successfully, changed files matched
-  `expectedChangedFiles`, forbidden files stayed untouched, configured context
-  checks passed, and required trace events were present.
-- `fail`: at least one command failed, changed files were missing or
-  unexpected, a forbidden file changed, a context file check failed, or a
-  required trace event was missing.
-- `blocked`: the harness could not run the task or collect the expected inputs.
-- `error`: the suite, task ID, command ID, or captured input could not be
-  interpreted.
-
-Real task-success measurement comes from the combination of prompt, fixture,
-verification commands, and changed-file expectations. Prefer comparing results
-between runs of the same suite revision. Do not compare results across suites
-unless the task mix and scoring contract are unchanged.

docs/BENCHMARK.md

@@ -1,130 +0,0 @@
-# Zero Task Benchmark
-
-This is the **task** benchmark: how often ZERO completes a real coding task
-end-to-end, headless, unattended. It is separate from
-[`docs/PERFORMANCE.md`](PERFORMANCE.md), which measures process startup and
-memory, not task success.
-
-The methodology is the point, not the digit. A task-success score is **largely
-model-bounded** — most of the number comes from whichever model you bring. So we
-record the model with every result and we publish the score **with and without
-the self-correct loop**, because the delta between those two runs is the part
-ZERO actually contributes: the agent noticing its own broken edit and fixing it
-before it hands the task back.
-
-## What is recorded
-
-Every run produces a self-describing JSON record so a published number is
-reproducible and auditable from the record alone:
-
-| Field            | Meaning                                                       |
-| ---------------- | ------------------------------------------------------------- |
-| `suite`          | Task set id (which tasks produced the number)                 |
-| `model`          | The model that ran — the score is model-bounded, so this is required |
-| `mode`           | Exec mode preset, if any                                      |
-| `selfCorrect`    | Whether the post-edit verify-and-correct loop was enabled     |
-| `version`        | ZERO version                                                  |
-| `commit`         | ZERO commit the run was built from                            |
-| `date`           | UTC timestamp of the run                                      |
-| `tasksAttempted` | Tasks attempted                                               |
-| `tasksPassed`    | Tasks whose verification passed                               |
-| `passRate`       | `tasksPassed / tasksAttempted`                                |
-| `tasks`          | Per-task pass/fail/error with detail                          |
-
-## Integration point: headless `zero exec`
-
-The harness drives ZERO through its headless surface — the same path CI uses:
-
-```bash
-zero exec --output-format stream-json --model <model> [--self-correct] "<task prompt>"
-```
-
-Per task, the harness reads the terminal `run_end` event's exit code from the
-stream-json output to decide pass/fail. When a task carries a
-`verificationCommand` (e.g. `go test ./...`), that command's exit status is
-authoritative — mirroring Terminal-Bench's external-verifier model: the task is
-"passed" only when the project's own checks pass after the agent finishes.
-
-## Task set format
-
-A task set is a JSON manifest. A runnable sample lives at
-[`cmd/zero-perf-bench/testdata/terminal-bench-sample.json`](../cmd/zero-perf-bench/testdata/terminal-bench-sample.json):
-
-```json
-{
-  "id": "terminal-bench-sample",
-  "name": "Terminal-Bench (sample)",
-  "tasks": [
-    {
-      "id": "hello-fix",
-      "name": "make the failing test pass",
-      "prompt": "The test in ./hello fails. Fix the implementation so `go test ./...` passes.",
-      "workspaceFixture": "./hello",
-      "verificationCommand": ["go", "test", "./..."]
-    }
-  ]
-}
-```
-
-## The exact command
-
-Build the binary, then run the task harness **twice** against the same task set
-and the same model — once without self-correct, once with — and stamp the version
-and commit so the records are reproducible:
-
-```bash
-# build the production binary
-go run ./cmd/zero-release build
-
-VERSION=$(git describe --tags --always)
-COMMIT=$(git rev-parse --short HEAD)
-SUITE=cmd/zero-perf-bench/testdata/terminal-bench-sample.json
-MODEL=<your-model>
-
-# baseline: self-correct OFF
-go run ./cmd/zero-perf-bench tasks \
-  --suite "$SUITE" --binary ./zero --model "$MODEL" \
-  --version "$VERSION" --commit "$COMMIT" \
-  --output dist/bench/tasks-baseline.json
-
-# self-correct ON (auto-fix needs --auto medium or high; see note below)
-go run ./cmd/zero-perf-bench tasks \
-  --suite "$SUITE" --binary ./zero --model "$MODEL" --self-correct \
-  --version "$VERSION" --commit "$COMMIT" \
-  --output dist/bench/tasks-selfcorrect.json
-```
-
-`--version`/`--commit` also read from `ZERO_BENCH_VERSION` / `ZERO_BENCH_COMMIT`
-when the flags are omitted, so CI can stamp them once in the environment.
-
-Use `--dry-run` to exercise the record path without invoking a model (every task
-is recorded as skipped) — useful for validating a task set before a real run.
-
-> **Self-correct and autonomy.** `--self-correct` runs the verify-and-correct
-> loop after each mutating edit. Whether a detected failure is **auto-fixed** or
-> only **reported** is gated by the run's autonomy: pass `--auto medium` (or
-> `high`) for the loop to drive corrective rounds. At the default low autonomy it
-> reports failures without auto-fixing, so the with/without delta is measured at
-> `--auto medium` or higher.
-
-## Published result
-
-Fill in after a clean run on a fixed machine. Keep both records; the delta is the
-headline.
-
-| Run                     | Model     | Self-correct | Pass rate | Commit |
-| ----------------------- | --------- | ------------ | --------- | ------ |
-| Baseline                | _TBD_     | off          | _TBD_     | _TBD_  |
-| With self-correct       | _TBD_     | on           | _TBD_     | _TBD_  |
-| **Self-correct delta**  |           |              | **_TBD_** |        |
-
-Report the model alongside the number every time. A score without its model is
-not a claim about ZERO — it is a claim about the model. The honest signal is the
-delta: how much the self-correct loop moved the same model on the same tasks.
-
-## Reproducing a published number
-
-1. Check out the `commit` from the record.
-2. `go run ./cmd/zero-release build`.
-3. Run the two commands above with the recorded `model` and `suite`.
-4. Compare `passRate` in the new records against the published ones.

docs/EXTENDING.md

@@ -1,341 +0,0 @@
-# Extending Zero
-
-Zero is an open-source terminal coding agent. Out of the box it does the obvious things — read, edit, run, search — but the design point of the project is that **every surface is configurable**. This document is the user-facing guide for that configuration.
-
-If you only want to *use* Zero, the [README](../README.md) is enough. This page is for the other three jobs:
-
-1. Tell the agent about *your* project (drop an `AGENTS.md` in your repo).
-2. Add new specialist sub-agents.
-3. Wire Zero into the rest of your toolchain (MCP, skills, hooks, plugins).
-
-## 1. Drop a project `AGENTS.md`
-
-When Zero starts in a directory, it looks for project-level instructions and injects them into the system prompt. The lookup walks from your current working directory **up to the nearest git root** and reads the first matching file at each level — general rules at the repo root, more specific rules in sub-trees. Files are labeled with their directory in the prompt (e.g. `## Project guidelines (services/api/AGENTS.md)`).
-
-Accepted file names, in priority order at each level:
-
-| Path | Notes |
-| --- | --- |
-| `./AGENTS.md` | The classic spot — committed to your repo, shared with the team. |
-| `./ZERO.md` | Brand-specific alias. Same format, lower priority. |
-| `./.zero/AGENTS.md` | Project-local, hidden, gitignored. Personal notes that stay out of git. |
-
-Matching is **case-insensitive** on the basename, so `AGENTS.md`, `Agents.md`, and `agents.md` resolve to the same file on Windows and macOS. The git-tracked filename in this repo is `AGENTS.md` — keep that on case-sensitive filesystems (Linux, the WSL filesystem, or a CI runner) to match what the loader looks for.
-
-Both files use the same format. YAML frontmatter is optional; the markdown body is loaded as instructions for the agent. Zero reads the file once at session start, so changes take effect on the next `zero` launch — not mid-session.
-
-```markdown
-# Project conventions for <your project>
-
-- Build with `make`, not `go build` directly.
-- Tests live next to the source file (`foo_test.go` next to `foo.go`).
-- Run `make lint` before opening a PR.
-- Never edit files under `third_party/` — those are vendored.
-```
-
-Tips:
-
-- Keep each file under ~8 KiB. Zero caps the **total** across all matched files at 32 KiB; everything past the cap is dropped.
-- Re-state rules in the imperative voice: "Run `make lint`", not "you should consider running the linter".
-- Don't put secrets, model IDs, or environment-specific paths in `AGENTS.md`. Use `config.json` for those.
-- In a monorepo, drop a narrower `AGENTS.md` in each sub-tree (e.g. `services/api/AGENTS.md`). Zero picks those up automatically when you launch from inside the sub-tree.
-- A YAML frontmatter block (`---\n...\n---`) at the top is preserved verbatim in the injected prompt but is not parsed for `globs:` or `alwaysApply:` scoping today — keep the body self-contained.
-
-### Personal guidelines, across every project
-
-For preferences that follow *you*, not a specific repo (tone, tooling habits, workflow), drop a `ZERO.md` in your user config directory: `~/.config/zero/ZERO.md` on Linux/macOS, `%AppData%\zero\ZERO.md` on Windows — the same directory as `config.json` and your personal specialists. Same format and 8 KiB cap as the project files above, and the same case-insensitive basename match.
-
-This file is injected as its own `## User guidelines` section, before the project's `AGENTS.md`/`ZERO.md`, and is labeled as personal preference in the prompt: project guidelines are the later, more specific instruction and take precedence over it when the two conflict.
-
-## 2. Custom specialists
-
-Specialists are Zero's sub-agents. Three scopes, in priority order:
-
-| Scope | Path | Shared? |
-| --- | --- | --- |
-| Built-in | compiled into Zero | yes — `worker`, `explorer`, `code-review` |
-| User | `~/.config/zero/specialists/*.md` | no — your machine only |
-| Project | `./.zero/specialists/*.md` | yes — the repo team |
-
-Project overrides user overrides built-in when names collide.
-
-A specialist is a markdown manifest with frontmatter and a system prompt:
-
-```markdown
----
-description: Reviews API changes for breaking-change risk and missing tests.
-tools: read-only,plan
----
-
-You review API changes. For every changed hunk in `internal/api/` or any file
-that ends in `_api.go`:
-
-1. Confirm the public signature is backward-compatible, or note the breaking
-   change explicitly with the migration path.
-2. Confirm a corresponding test exists in `internal/api/*_test.go` and that
-   the new behaviour is exercised.
-3. Flag any new exported symbol without a doc comment.
-
-Reply with one JSON object per finding: `{"file", "line", "severity", "message", "fix"}`.
-```
-
-CLI management (the prompt is passed inline via `--prompt`):
-
-```bash
-zero specialist list
-zero specialist show api-reviewer
-zero specialist create api-reviewer \
-    --project \
-    --description "Reviews API changes" \
-    --tools read-only,plan \
-    --prompt "$(cat api-reviewer.md)"
-zero specialist edit api-reviewer --project
-zero specialist delete api-reviewer --project
-zero specialist path                       # prints the resolved specialists directory
-```
-
-The full format spec (frontmatter fields, tool scopes, prompt conventions) is in [`docs/SPECIALISTS.md`](SPECIALISTS.md).
-
-> **Roadmap.** An in-UI specialist manager (create / edit / delete / preview) is on the backlog. Today you use the `zero specialist` CLI subcommands above.
-
-## 3. Skills
-
-Skills are markdown instruction packs the agent can pull in on demand. Each skill is a directory containing a `SKILL.md`. Standalone project skill directories are not supported in this version (shared project-wide skills must go in `AGENTS.md` or as a hook). However, project plugins (section 6) may bundle skills, which are merged into the active run.
-
-Discovery roots (earlier wins on name collisions):
-
-1. **Primary Zero dir** — `$ZERO_SKILLS_DIR` if set, else `$XDG_DATA_HOME/zero/skills`, else `~/.local/share/zero/skills/`
-2. **Shared multi-agent dir** — `~/.agents/skills/` when present (read-only discovery; never an install target)
-3. **Plugin skill roots** — skills bundled by active plugins (section 6)
-
-A missing directory is fine — Zero just omits it. Management commands (`zero skill add` / `zero skill remove`) always write to the primary Zero dir only; `list` / `info` search primary + `~/.agents/skills`. `skill info` reports lock source/hash when present and whether the on-disk `SKILL.md` has drifted from the recorded hash.
-
-```text
-~/.local/share/zero/skills/          # primary (install/remove target)
-  run-benchmarks/
-    SKILL.md
-  write-changelog/
-    SKILL.md
-
-~/.agents/skills/                    # optional shared multi-agent root
-  shared-review/
-    SKILL.md
-```
-
-`SKILL.md` format:
-
-```markdown
----
-description: Run the project's benchmark suite and summarize the deltas.
----
-
-# Run benchmarks
-
-1. `make bench` — captures the wall-clock and RSS before and after.
-2. `benchstat before.txt after.txt` — diffs the two.
-3. Report any regression > 5% with the function name and the previous value.
-```
-
-Only `name` and `description` are recognized in the frontmatter today. The `name` defaults to the directory name. Within a single skills root, duplicate names are resolved by lexicographic directory order. Across roots, Zero loads the primary directory first, then `~/.agents/skills`, then plugin skill roots; earlier roots win name collisions. Plugin-declared skills (section 6) are merged into the active agent run at plugin activation time, so bundled skills appear in the available skills list and can be loaded with the `skill` tool.
-
-The `skill` tool lets the agent load any discovered skill by name (primary, agents, or plugin).
-
-## 4. Hooks
-
-Hooks fire shell commands on lifecycle events. Configure them in JSON:
-
-- User: `~/.config/zero/hooks.json`
-- Project: `./.zero/hooks.json`
-
-```json
-{
-  "enabled": true,
-  "hooks": [
-    {
-      "id": "block-rm-rf",
-      "event": "beforeTool",
-      "matcher": "bash",
-      "command": "/usr/local/bin/zero-hook-block-rmrf.sh",
-      "enabled": true
-    },
-    {
-      "id": "log-session",
-      "event": "sessionStart",
-      "command": "/usr/local/bin/zero-hook-log.sh",
-      "enabled": true
-    }
-  ]
-}
-```
-
-The `args` array (when present) is passed verbatim to `exec.CommandContext`. The actual hook payload — event name, matcher, tool call id, tool name, tool input, tool output, status — is delivered to the command as **JSON on stdin**, not via `${...}` substitution. A typical handler reads stdin and decides what to do:
-
-```bash
-#!/usr/bin/env bash
-# /usr/local/bin/zero-hook-block-rmrf.sh
-set -euo pipefail
-payload="$(cat)"
-if printf '%s' "$payload" | grep -q '"input":"[^"]*rm[[:space:]]+-rf'; then
-  echo "refusing rm -rf" >&2
-  exit 1
-fi
-```
-
-Events the agent emits (in dispatch order):
-
-| Event | Fires when | Matcher allowed? |
-| --- | --- | --- |
-| `beforeTool` | A tool is about to run | yes (tool name) |
-| `afterTool` | A tool just returned | yes (tool name) |
-| `sessionStart` | A session begins | no |
-| `sessionEnd` | A session ends | no |
-| `specialistStart` | A sub-agent is spawned | yes (specialist name) |
-| `specialistStop` | A sub-agent ends | yes (specialist name) |
-
-A hook's exit code decides what happens next: `0` continues, non-zero blocks the tool call (`beforeTool`) or surfaces an error (`afterTool`). Hook execution is recorded in the audit log; the audit is reachable from the agent's view of past actions, not from a dedicated `zero doctor` check.
-
-> **Roadmap.** An in-UI hooks manager is on the backlog. Today you edit the JSON directly.
-
-## 5. MCP — Model Context Protocol
-
-Zero is both an **MCP client** (it can call external MCP servers) and an **MCP server** (other agents can call its tools).
-
-### As a client — configure MCP servers in `config.json`
-
-```json
-{
-  "mcp": {
-    "servers": {
-      "docs": {
-        "type": "stdio",
-        "command": "docs-mcp",
-        "args": ["--port", "7777"]
-      },
-      "github": {
-        "type": "http",
-        "url": "https://api.example.com/mcp",
-        "headers": { "Authorization": "Bearer YOUR_TOKEN_HERE" }
-      }
-    }
-  }
-}
-```
-
-Manage via CLI:
-
-```bash
-zero mcp add docs --type stdio -- docs-mcp --port 7777
-zero mcp add github --type http --url https://api.example.com/mcp \
-    --header "Authorization=Bearer YOUR_TOKEN_HERE"
-zero mcp list
-zero mcp check docs
-zero mcp remove github
-zero mcp oauth login github
-```
-
-Servers are merged from user and project configs (project wins on conflicts). Token-bearing values in `config.json` are sent verbatim — there is no `${env:...}` expansion — so prefer one of:
-
-- A wrapper script that sources the secret and execs the real command.
-- A `--header` value produced by command substitution (`"Authorization=Bearer $(print-token)"`) in a private shell config that you keep out of git.
-- A secret manager that injects the env var your MCP server reads on its own (the `command` and `args` then run inside that environment).
-
-Project MCP config remains supported for shared team servers, but a project layer
-that changes an existing server's target (`url`, `command`, or `args`) does not
-inherit user credentials. Clear or replace `headers`, `env`, or `oauth` explicitly,
-or use a new server name. OAuth tokens are bound to the resolved server identity,
-so changing a server target can require `zero mcp oauth login <server>` again.
-OAuth server names ending in `.<32 hex chars>` are reserved for token storage.
-
-### As a server — expose Zero's tools to another agent
-
-```bash
-zero serve --mcp
-zero serve --mcp -C /path/to/workspace
-zero serve --mcp --add-dir /path/to/extra
-```
-
-The server speaks MCP over stdio. Configure it from the receiving side as a `stdio` server whose command is `zero serve --mcp`.
-
-`-C/--cwd` sets the workspace root exposed as MCP resources and used by core tools. `--add-dir` (repeatable) widens that resource/tool scope beyond the workspace without granting the sandbox temp roots used by interactive runs.
-## 6. Plugins
-
-A plugin is a self-contained directory that bundles tools, hooks, and skills for one capability. Plugins live at:
-
-- User: `~/.config/zero/plugins/<id>/`
-- Project: `./.zero/plugins/<id>/`
-
-Each plugin has a `plugin.json` manifest:
-
-```json
-{
-  "id": "github-pr-review",
-  "name": "GitHub PR Review",
-  "description": "Adds review tools for GitHub PRs.",
-  "version": "1.0.0",
-  "tools": [
-    { "name": "list_prs", "command": "./tools/list_prs.sh" }
-  ],
-  "hooks": [
-    { "name": "pre-merge-check", "event": "beforeTool", "command": "./hooks/pre-merge.sh" }
-  ],
-  "skills": [
-    { "path": "./skills/review-checklist/SKILL.md" }
-  ]
-}
-```
-
-Install and manage:
-
-```bash
-zero plugins add ./github-pr-review      # copy into ~/.config/zero/plugins/ or ./.zero/plugins/
-zero plugins list
-zero plugins info github-pr-review       # show manifest path, enabled state, lock metadata
-zero plugins remove github-pr-review    # alias: rm
-```
-
-A plugin is enabled by being present in the plugins directory and disabled by removing it (or by the user setting `"enabled": false` in its `plugin.json`). Plugins are not enabled or disabled by a CLI subcommand today.
-
-Plugin commands run with the plugin directory as their working directory. Use relative paths; the loader resolves them at activation time.
-
-> **Roadmap.** An in-UI plugins manager (browse, install, enable / disable) is on the backlog. Today you use the `zero plugins` CLI subcommands above.
-
-## 7. Configuration locations
-
-Five configuration sources, in precedence order (later sources override earlier ones):
-
-| Source | Path / Key | Notes |
-| --- | --- | --- |
-| Built-in defaults | compiled in | Lowest priority. |
-| User config | `~/.config/zero/config.json` | Your machine. Never committed. |
-| Project config | `./.zero/config.json` | The repo. Committed (or not, your call). |
-| Environment | `ZERO_*` | Provider commands, secrets, skills dir override. |
-| CLI flags | `--model`, `--mode`, ... | Highest priority, per-invocation. |
-
-The user config holds things that should follow the user across projects (default provider, default model, theme). The project config holds things the team agreed on (provider catalog, sandbox policies, model restrictions).
-
-The sandbox `additionalWriteRoots` key is **ignored in project config** by design — a checked-out repo cannot widen its own sandbox. Set it in the user config or pass `--add-dir` per-invocation.
-
-## 8. End-to-end example
-
-A team that wants every contributor's Zero to behave the same way commits:
-
-- `AGENTS.md` — project conventions, build commands, do-not-edit lists.
-- `.zero/config.json` — provider catalog, default model, allowed tools.
-- `.zero/specialists/api-reviewer.md` — the team's PR-review specialist.
-- `.zero/hooks.json` — block `rm -rf` on `beforeTool`.
-- `.zero/plugins/internal-tooling/` — a plugin that adds the team's internal CLI tools to the agent's toolset.
-
-Each contributor adds only:
-
-- `~/.config/zero/config.json` — their personal API keys, theme, default mode.
-- `~/.config/zero/ZERO.md` — personal preferences that follow them across every project (see section 1).
-- `~/.local/share/zero/skills/` — personal skills they keep across projects.
-
-That's it. Run `zero` from the repo root and the agent has the team's full instruction set, every contributor's personal setup, and nothing else.
-
-## 9. Reference
-
-- [README](../README.md) — install, quickstart, command reference.
-- [docs/SPECIALISTS.md](SPECIALISTS.md) — full specialist manifest spec.
-- [docs/STREAM_JSON_PROTOCOL.md](STREAM_JSON_PROTOCOL.md) — `zero exec` I/O contract.
-- [docs/INSTALL.md](INSTALL.md) — install from source or release.

docs/GITHUB_ACTION.md

@@ -1,203 +0,0 @@
-# ZERO GitHub Action
-
-Run ZERO headlessly inside a GitHub workflow. The action is a thin wrapper around
-`zero exec`: it installs a pinned ZERO release, runs your prompt in the checked-out
-repository, surfaces ZERO's exit code as the step status, captures the output as a
-file, and can optionally post a summary to the triggering pull request or to Slack.
-
-ZERO is model- and provider-agnostic, and so is this action: **you** choose the
-provider and supply the API key. Nothing is hardcoded to any single provider.
-
-## Quick start
-
-```yaml
-# .github/workflows/zero.yml
-name: ZERO
-on:
-  workflow_dispatch:
-    inputs:
-      task:
-        description: What should ZERO do?
-        required: true
-
-permissions:
-  contents: write
-
-jobs:
-  run:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: Twigpine/zero@v1
-        with:
-          prompt: ${{ inputs.task }}
-          provider: openai
-          api-key-env: OPENAI_API_KEY
-          api-key: ${{ secrets.OPENAI_API_KEY }}
-          model: gpt-4.1
-```
-
-> The `provider`, `api-key-env`, and `api-key` trio is how you stay
-> provider-neutral: `api-key-env` is the environment variable name the chosen
-> provider reads its key from (for example `ANTHROPIC_API_KEY`, `GEMINI_API_KEY`,
-> `OPENROUTER_API_KEY`), and `api-key` is the secret value. The action exports
-> that variable only for the ZERO step and never prints it. If your repository
-> already commits a `.zero/config.json` with an active provider, you can omit
-> `provider`.
-
-## Inputs
-
-| Input | Required | Default | Description |
-| --- | --- | --- | --- |
-| `prompt` | one of `prompt`/`prompt-file` | `""` | The instruction for ZERO to execute. |
-| `prompt-file` | one of `prompt`/`prompt-file` | `""` | Path (relative to `working-directory`) to a file whose contents are the prompt. |
-| `provider` | no | `""` | Provider id to activate (e.g. `openai`, `anthropic`, `gemini`, `ollama`, or any compatible endpoint). |
-| `api-key` | no | `""` | The provider API key. Pass from a secret; exported only for the ZERO step and never logged. |
-| `api-key-env` | no | `""` | Env var name the provider reads its key from (e.g. `OPENAI_API_KEY`). Exported only for the ZERO step when used with `api-key`. |
-| `model` | no | `""` | Model id. Defaults to the resolved provider's default. |
-| `mode` | no | `""` | Run mode (`zero exec --mode`), e.g. `smart`, `deep`, `fast`. |
-| `auto` | no | `low` | Autonomy ceiling (`zero exec --auto`): `low`, `medium`, or `high`. Conservative by default. |
-| `self-correct` | no | `false` | Allow mid-run model escalation (`zero exec --allow-escalation`). |
-| `add-dir` | no | `""` | Newline-/comma-separated extra write roots (`zero exec --add-dir`). |
-| `worktree` | no | `false` | Run in an isolated git worktree (`zero exec --worktree`). |
-| `output-format` | no | `stream-json` | `text`, `json`, or `stream-json`. Captured to a file. |
-| `post-to` | no | `none` | `pr-comment`, `slack`, or `none`. Where to post a summary after the run. |
-| `slack-webhook-url` | no | `""` | Slack incoming-webhook (or generic webhook) URL for `post-to: slack`. Pass from a secret. |
-| `github-token` | no | `${{ github.token }}` | Token used to post a PR comment. Requires `pull-requests: write`. |
-| `working-directory` | no | `${{ github.workspace }}` | Directory to run ZERO in. |
-| `zero-version` | no | (action ref → `latest`) | ZERO release version/tag to install, e.g. `v1.2.3` or `latest`. |
-| `zero-repo` | no | `Twigpine/zero` | Repository to install the ZERO release from. |
-
-## Outputs
-
-| Output | Description |
-| --- | --- |
-| `exit-code` | ZERO's exit code (`0` success, `2` usage, `3` provider, non-zero otherwise). |
-| `output-file` | Path to the captured ZERO stdout (the raw `output-format` stream). |
-| `summary` | A short, single-line summary parsed from the run, when available. |
-
-The step **fails when ZERO returns a non-zero exit code**, so a failed run fails
-the job by default. Use `continue-on-error: true` on the step (and read
-`exit-code`) if you want to handle failures yourself.
-
-## Examples
-
-### Run ZERO on every issue labeled `zero`
-
-```yaml
-name: ZERO issue triage
-on:
-  issues:
-    types: [labeled]
-
-permissions:
-  contents: write
-  issues: write
-  pull-requests: write
-
-jobs:
-  triage:
-    if: github.event.label.name == 'zero'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: Twigpine/zero@v1
-        with:
-          prompt: |
-            Investigate this issue and propose a fix.
-
-            Title: ${{ github.event.issue.title }}
-
-            ${{ github.event.issue.body }}
-          provider: anthropic
-          api-key-env: ANTHROPIC_API_KEY
-          api-key: ${{ secrets.ANTHROPIC_API_KEY }}
-          auto: low
-          post-to: slack
-          slack-webhook-url: ${{ secrets.ZERO_SLACK_WEBHOOK_URL }}
-```
-
-### Nightly dependency-upgrade PR
-
-```yaml
-name: ZERO nightly deps
-on:
-  schedule:
-    - cron: "0 6 * * 1" # Mondays 06:00 UTC
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  deps:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: Twigpine/zero@v1
-        id: zero
-        with:
-          prompt-file: .github/zero/upgrade-deps.md
-          provider: openai
-          api-key-env: OPENAI_API_KEY
-          api-key: ${{ secrets.OPENAI_API_KEY }}
-          worktree: true
-          auto: medium
-      - name: Open pull request
-        run: |
-          git checkout -b zero/deps-$(date +%Y%m%d)
-          git commit -am "chore(deps): nightly upgrade via ZERO" || exit 0
-          git push -u origin HEAD
-          gh pr create --fill --label dependencies
-        env:
-          GH_TOKEN: ${{ github.token }}
-      - name: Upload ZERO output
-        if: always()
-        uses: actions/upload-artifact@v4
-        with:
-          name: zero-output
-          path: ${{ steps.zero.outputs.output-file }}
-          if-no-files-found: warn
-```
-
-## Security notes
-
-- **Secrets are passed as Action secrets and never logged.** The action exports
-  `api-key` (under `api-key-env`) only for the ZERO step. `slack-webhook-url`
-  is passed only to the Slack post step. They are never echoed or persisted to
-  later workflow steps, and ZERO redacts secret-shaped strings from its own
-  output.
-- **The sandbox is always active.** This action never passes
-  `--skip-permissions-unsafe`, so writes stay inside the checked-out repository
-  (plus any roots you grant with `add-dir`). Unsafe mode is never enabled
-  implicitly.
-- **Autonomy defaults to `low`.** Raise it deliberately (`auto: medium`/`high`)
-  only for tasks you trust to run unattended.
-- **Least-privilege tokens.** Grant only the permissions the workflow needs
-  (`contents: write` to edit files, `pull-requests: write` to comment). The
-  default `GITHUB_TOKEN` is scoped to the repository.
-- **Pin the action.** Reference a tag (`Twigpine/zero@v1`) or a commit SHA so a
-  workflow run uses a known ZERO version. `zero-version` lets you pin the
-  installed binary independently of the action ref.
-- **Linux and macOS runners** are supported; Windows runners are rejected with a
-  clear error.
-
-## Slack / webhook notifier
-
-The action's `post-to: slack` step sends a one-line summary to a Slack incoming
-webhook after the run. ZERO also has a built-in webhook notifier sink
-(`internal/notify`) that an unattended run can use to report
-"finished / needs input / verify failed after N retries" to Slack or any generic
-webhook:
-
-- Configure the destination with the `ZERO_SLACK_WEBHOOK_URL` environment variable
-  (or settings). A blank URL disables the sink.
-- The sink POSTs a JSON body `{ "text", "type", "message", "summary?", "links?" }`.
-  The `text` field is what Slack renders; the structured fields carry the
-  machine-readable detail.
-- **Fail-soft:** a non-2xx response or a transport error is logged (redacted) and
-  swallowed — a webhook problem never crashes the run.
-- **Redaction:** the message, summary, links, and the webhook URL itself are run
-  through ZERO's redaction before being sent or logged, so tokens never leak.
-- **Egress/proxy:** the notifier uses the default HTTP transport, which honors
-  `HTTP_PROXY`/`HTTPS_PROXY` when a proxy is configured.

docs/HOW_ZERO_WORKS.md

@@ -1,807 +0,0 @@
-# How Zero Works
-
-This document explains Zero's architecture at a high level: the layers, module
-boundaries, data flow, and runtime concepts behind the interactive TUI and the
-headless `zero exec` mode.
-
-It is written as a progressive map: each high-level section introduces the
-concepts you need for orientation, then points to the later section that explains
-the mechanics in more detail.
-
-## Big Picture
-
-Zero is a Go CLI application with two main user-facing surfaces:
-
-- **Interactive TUI** (`zero`): a Bubble Tea application that renders chat,
-  tool cards, permission prompts, model/provider pickers, and session controls.
-- **Headless exec** (`zero exec ...`): a scriptable command runner that uses the
-  same agent loop and tools, but writes text, JSON, or stream-JSON events.
-
-Both surfaces converge on the same core agent runtime:
-
-```mermaid
-flowchart TD
-    User[User / automation] --> CLI[cmd/zero -> internal/cli]
-
-    CLI --> TUI[Interactive TUI<br/>internal/tui]
-    CLI --> Exec[Headless exec<br/>internal/cli/exec.go]
-    CLI --> ACP[ACP / editor bridge<br/>internal/acp]
-
-    TUI --> Agent[Agent loop<br/>internal/agent]
-    Exec --> Agent
-    ACP --> Agent
-
-    Agent --> Provider[Provider runtime<br/>internal/zeroruntime.Provider]
-    Provider --> APIs[OpenAI / Anthropic / Gemini / compatible APIs]
-
-    Agent --> Registry[Tool registry<br/>internal/tools.Registry]
-    Registry --> CoreTools[Core tools<br/>read/edit/shell/search/plan]
-    Registry --> MCP[MCP tools<br/>internal/mcp]
-    Registry --> Specialists[Specialist tools<br/>internal/specialist]
-    Registry --> Plugins[Plugin tools<br/>internal/plugins]
-    Registry --> LocalControl[Browser / terminal / desktop helpers]
-
-    Agent --> Sandbox[Permission + sandbox engine<br/>internal/sandbox]
-    Agent --> Hooks[Hooks dispatcher<br/>internal/hooks]
-    Agent --> Sessions[Session event store<br/>internal/sessions]
-```
-
-The important split is:
-
-- `internal/tui` is the **presentation layer**. For the mechanics, see
-  [Presentation Layer: Bubble Tea TUI](#presentation-layer-bubble-tea-tui) and
-  [How the TUI and Agent Loop Connect](#how-the-tui-and-agent-loop-connect).
-- `internal/agent` is the **reasoning/tool loop**. For the per-turn mechanics,
-  see [Agent Loop](#agent-loop), [Tool Execution Lifecycle](#tool-execution-lifecycle),
-  and [Context Budget and Compaction](#context-budget-and-compaction).
-- `internal/tools`, `internal/sandbox`, and provider packages are the **runtime
-  capability layer**. For the details, see [Runtime Provider Layer](#runtime-provider-layer),
-  [Tools and Capabilities](#tools-and-capabilities), and
-  [Permission and Sandbox Model](#permission-and-sandbox-model).
-- `internal/sessions` is the **durable event log** used for resume, fork,
-  rewind, sub-agents, and history. See [Session Storage and History](#session-storage-and-history).
-
-## Architecture Spine
-
-The easiest way to understand Zero is not as a set of independent packages, but
-as one spine with several mechanisms attached to it:
-
-```mermaid
-flowchart LR
-    Surface[Surface<br/>TUI / exec / ACP] --> Run[Run request<br/>prompt + runtime options]
-    Run --> Agent[Agent loop<br/>turns, tools, recovery]
-    Agent --> Capabilities[Capabilities<br/>providers + tools + sandbox]
-    Capabilities --> Events[Runtime events<br/>text, tool calls, permissions, usage]
-    Events --> Surface
-    Events --> Sessions[Session log<br/>resume, fork, rewind, history]
-
-    Config[Config / guidelines / skills] --> Run
-    Extensions[MCP / specialists / plugins / hooks] --> Capabilities
-```
-
-The **TUI + agent loop** is the main story because it explains the normal user
-experience: type a prompt, watch the model stream, approve tool use, see file
-changes, and receive a final answer. Other mechanisms are still important, but
-most of them attach to the same spine:
-
-| Mechanism | Where it attaches | What it changes |
-| --- | --- | --- |
-| Config, provider profiles, model registry | Before a run starts | Which provider/model is used and what defaults apply. |
-| Project/user guidelines, skills, specialists context | Prompt construction | What instructions and available capabilities the model sees. |
-| Tool registry, MCP, plugins, local-control helpers | Capability layer | Which actions the model may request. |
-| Permission policy, sandbox, command-prefix grants | Tool execution | Whether a requested action can run, needs approval, or is denied. |
-| Hooks | Tool lifecycle | Optional before/after observers or blockers around tool calls. |
-| Sessions, checkpoints, compaction metadata | Event persistence/context | What can be resumed, forked, rewound, or summarized for later turns. |
-| Stream-JSON | Surface layer | How the same runtime events are emitted for automation instead of rendered in the TUI. |
-
-So this document focuses first on the TUI/agent-loop bridge, then explains the
-supporting mechanisms in terms of where they connect to that bridge.
-
-Use this as the reading path:
-
-| If you see this concept in a high-level flow | Read this detail section |
-| --- | --- |
-| Surface submits a run | [Startup Flow](#startup-flow), then [How the TUI and Agent Loop Connect](#how-the-tui-and-agent-loop-connect) |
-| Agent builds context and advances turns | [Agent Loop](#agent-loop) |
-| “Maybe compact context” | [Context Budget and Compaction](#context-budget-and-compaction) |
-| Model requests a tool | [Tool Execution Lifecycle](#tool-execution-lifecycle), then [Tools and Capabilities](#tools-and-capabilities) |
-| Tool needs approval or sandbox access | [Permission and Sandbox Model](#permission-and-sandbox-model) |
-| Events appear in the UI or stream-JSON | [How the TUI and Agent Loop Connect](#how-the-tui-and-agent-loop-connect), [Stream-JSON Protocol](#stream-json-protocol) |
-| Resume, fork, rewind, or sub-agent history | [Session Storage and History](#session-storage-and-history) |
-
-## Main Packages
-
-The sections above describe the architecture in concepts. If you want to connect
-those concepts to implementation details, use this table as the code map before
-reading the deeper flows below.
-
-| Package | Role |
-| --- | --- |
-| `cmd/zero` | Tiny binary entrypoint; calls `internal/cli.Run`. |
-| `internal/cli` | Command parsing, config resolution, provider creation, registry setup, TUI/exec/ACP launch paths. |
-| `internal/tui` | Bubble Tea model/update/view code, transcript rendering, composer, prompts, slash commands, setup wizard. |
-| `internal/agent` | Core loop that sends messages to the model, streams output, executes tools, handles permissions, compaction, retries, and final answers. |
-| `internal/zeroruntime` | Provider-neutral message, tool-call, stream, usage, and image types. Providers implement `Provider.StreamCompletion`. |
-| `internal/providers` | Factory that turns a resolved provider profile into an OpenAI, Anthropic, Gemini, Codex, or compatible provider adapter. |
-| `internal/tools` | Tool interface, registry, core read/write/shell/network tools, local-control wrappers, tool safety metadata, redaction, output ceilings. |
-| `internal/sandbox` | Permission policy, path/network checks, grant store, command-prefix approvals, and platform sandbox backends. |
-| `internal/sessions` | Local append-only session storage: `metadata.json` + `events.jsonl`. |
-| `internal/config` | User/project config resolution, active provider, preferences, sandbox/tool settings. |
-| `internal/mcp` | MCP server config, client runtime, permission store, and MCP tool registration. |
-| `internal/specialist` / `internal/swarm` | Sub-agent manifests and team/member orchestration exposed as tools. |
-| `internal/localcontrol` / `internal/browser` | Runtime helpers used by config-gated local-control tool wrappers. |
-| `internal/plugins` / `internal/skills` / `internal/hooks` | Extension surfaces loaded into the agent context, tool registry, or tool lifecycle. |
-| `internal/streamjson` | Machine-readable protocol for `zero exec --input-format/--output-format stream-json`. |
-
-## Startup Flow
-
-### Interactive TUI (`zero`)
-
-```mermaid
-sequenceDiagram
-    participant Main as cmd/zero
-    participant CLI as internal/cli
-    participant Config as internal/config
-    participant TUI as internal/tui
-    participant Agent as internal/agent
-
-    Main->>CLI: Run(args)
-    CLI->>Config: resolve config for workspace
-    CLI->>CLI: build provider
-    CLI->>CLI: build tool registry
-    CLI->>CLI: register core, config-gated local-control, specialists, MCP, plugins
-    CLI->>CLI: create sandbox engine + session store
-    CLI->>TUI: run Bubble Tea with Options
-    TUI->>TUI: Init / Update / View event loop
-    TUI->>Agent: agent.Run on submitted prompt
-```
-
-The TUI owns terminal interaction. It tracks composer state, transcript rows,
-scrolling, permission dialogs, model/provider pickers, setup wizard state, and
-visual updates. When the user submits a prompt, the TUI builds `agent.Options`
-with callbacks like `OnText`, `OnToolCall`, `OnToolResult`, `OnPermission`,
-`OnAskUser`, and `OnUsage`. Those callbacks convert runtime events into visible
-transcript rows and session events.
-
-### Headless exec (`zero exec`)
-
-```mermaid
-flowchart TD
-    A[Parse exec flags] --> B[Resolve config + provider]
-    B --> C[Build tool registry]
-    C --> D[Resolve prompt / stream-json input / images]
-    D --> E[Prepare or resume session]
-    E --> F[Create stream-json/text/json writer]
-    F --> G[agent.Run]
-    G --> H[Write final output and exit code]
-```
-
-`zero exec` uses the same `agent.Run` loop as the TUI, but without interactive
-terminal state. It can persist sessions, resume/fork existing sessions, run in
-stream-JSON mode for automation, and always requires a stronger completion
-signal so a no-tool assistant response is not treated as success while work is
-still pending.
-
-## Agent Loop
-
-The core loop lives in `internal/agent.Run`. Conceptually, every turn follows
-this cycle:
-
-```mermaid
-flowchart TD
-    Start[Build system prompt + user prompt] --> Expose[Partition visible tools]
-    Expose --> Compact[Maybe compact context]
-    Compact --> Request[Send CompletionRequest to provider]
-    Request --> Stream[Collect streamed text, reasoning, usage, tool calls]
-
-    Stream --> HasTools{Tool calls?}
-    HasTools -- No --> FinalCheck{Final answer acceptable?}
-    FinalCheck -- Yes --> Done[Return Result]
-    FinalCheck -- No --> Nudge[Append user nudge and continue]
-
-    HasTools -- Yes --> Execute[Execute tool calls]
-    Execute --> Permission[Permission / sandbox / hooks]
-    Permission --> ToolResult[Append tool result messages]
-    ToolResult --> Diagnostics[Post-edit diagnostics / self-correct]
-    Diagnostics --> Expose
-```
-
-Key responsibilities of the loop:
-
-1. **Build prompt state** — combines the system prompt, project/user guidelines,
-   loaded skills/specialist instructions, the current user prompt, and images. The
-   resulting message list is the model-facing context that later tool results are
-   appended to. Resumed session history is replayed by the caller before a new run,
-   not passed as a separate `agent.Run` history field.
-2. **Expose tools** — starts from the registry built by the CLI, then filters
-   tool definitions by permission mode, enabled or disabled filters, and
-   deferred-loading rules. Tool schemas also count toward context budget, so they
-   matter for compaction decisions.
-3. **Call provider** — sends a provider-neutral `zeroruntime.CompletionRequest`.
-4. **Stream events** — forwards text, reasoning, tool-call deltas, and usage to
-   the caller via callbacks.
-5. **Execute tools** — decodes tool arguments, checks filters, applies
-   permissions and sandbox policy, dispatches hooks, runs the registered tool,
-   redacts output, and appends a tool message. See
-   [Tool Execution Lifecycle](#tool-execution-lifecycle).
-6. **Recover and guard** — handles malformed tool calls, repeated failures,
-   empty turns, context pressure, stream reconnect/retry, and max-turn fallback.
-   Context pressure is handled by [Context Budget and Compaction](#context-budget-and-compaction).
-7. **Finalize** — returns a final answer or a structured incomplete/stop reason.
-
-The model never directly mutates the workspace. It asks for tool calls; Zero
-validates and executes those calls through the registry, permission policy, and
-sandbox engine.
-
-## Tool Execution Lifecycle
-
-A tool call is part of the model conversation, not a side channel that bypasses
-it. The model proposes an action, Zero decides whether that action is allowed to
-run, the tool returns a structured result, and that result becomes context for the
-next provider request.
-
-```mermaid
-sequenceDiagram
-    participant Model as LLM / provider
-    participant Agent as agent.Run
-    participant Policy as filters + permissions + sandbox
-    participant Hooks as hooks
-    participant Tool as tool implementation
-    participant Surface as TUI / exec callbacks
-    participant Transcript as model conversation + session events
-
-    Agent->>Model: request with messages + available tool schemas
-    Model-->>Agent: assistant text and/or tool_call(name, args)
-    Agent-->>Surface: stream text / tool-call preview
-    Agent->>Agent: collect and decode tool arguments
-    Agent->>Policy: check tool filters, permission mode, sandbox policy
-
-    alt denied before execution
-        Policy-->>Agent: denied result
-        Agent-->>Surface: tool failed/denied event
-        Agent->>Transcript: append tool result explaining denial
-    else needs user approval
-        Policy-->>Surface: permission request
-        Surface-->>Policy: allow / deny / remember decision
-        Policy-->>Agent: decision
-    end
-
-    alt approved to execute
-        Agent->>Hooks: beforeTool hooks
-        Hooks-->>Agent: allow / block / annotate
-        Agent->>Tool: execute(ctx, args)
-        Tool-->>Agent: output, error, metadata
-        Agent->>Hooks: afterTool hooks
-        Agent->>Agent: redact secrets, apply semantic output budget, enforce byte ceiling
-        Agent->>Agent: classify success/failure
-        Agent-->>Surface: OnToolResult callback
-        Agent->>Transcript: append tool result message
-    end
-
-    Agent->>Model: next request includes prior assistant tool_call + tool result
-    Model-->>Agent: continue with more tools or final answer
-```
-
-Conceptually, one requested tool goes through these phases:
-
-1. **Proposal** — the provider streams assistant content and may emit one or more
-   tool calls. Zero can show the partial tool arguments in the TUI while they are
-   still streaming, but nothing has executed yet.
-2. **Decode and gate** — the agent validates JSON arguments, checks whether the
-   tool is enabled, applies permission mode, asks the sandbox engine about path,
-   network, shell, or command-prefix constraints, and may invoke permission
-   callbacks.
-3. **Execute** — the selected registry entry runs locally, through MCP, as a
-   specialist/sub-agent, or through a plugin/local-control helper. Hooks can run
-   before or after this step.
-4. **Normalize result** — Zero turns the outcome into an agent `ToolResult`: a
-   success, failure, denial, cancellation, timeout, or validation error with
-   output/metadata that may be redacted or truncated.
-5. **Append to context** — the result is appended as a tool-result message paired
-   with the assistant tool call. The next model request includes that result, so
-   the model can inspect it and decide what to do next.
-6. **Render and persist** — the result is surfaced to the TUI, stream-JSON
-   writer, or ACP client. TUI and exec record rich tool/session events for
-   resume/history; ACP persists conversational messages and completed tool-call
-   starts/results for load replay. Live streaming details and permission
-   exchanges remain client notifications rather than durable history.
-
-Tool success and failure are both informative context. A successful `read_file`
-result gives the model file contents; a failed `edit_file` result gives the model
-an error such as “old string not found”; a denied shell command tells the model
-that the action is not currently permitted. The model is expected to use that
-feedback to continue, choose another tool, ask the user, or explain the blocker.
-
-The judgement that “information is sufficient” is made by the model, not by the
-TUI. Zero controls the loop mechanics: it keeps appending messages, enforces
-safety, retries or nudges around malformed/empty/incomplete turns, and stops on
-hard limits. But the semantic decision to call another tool versus produce a
-final answer comes from the next provider response. In other words:
-
-```mermaid
-flowchart TD
-    Result[Tool result appended to conversation] --> Next[Next provider request]
-    Next --> Decide{Model response}
-    Decide -- More information/action needed --> MoreTools[Request another tool]
-    MoreTools --> Result
-    Decide -- User input needed --> AskUser[Call ask_user or explain question]
-    AskUser --> Result
-    Decide -- Enough information --> Final[Final assistant answer]
-    Decide -- Invalid / empty / unsafe --> Guard[Agent guardrail, retry, denial, or stop reason]
-    Guard --> Next
-```
-
-This is why tool output is usually more than UI decoration. It is part of the
-working memory for the next model turn, subject to context-window pressure and
-compaction. The TUI may summarize or prettify it for the user, but the agent loop
-also stores the machine-facing result that the model sees.
-
-## Context Budget and Compaction
-
-The `Maybe compact context` step in the agent-loop diagram is Zero's context-window
-pressure valve. It is not a separate memory engine; it rewrites the current
-model-facing conversation so the next provider request fits within the configured
-context window.
-
-Compaction is enabled only when the run knows a positive `ContextWindow`. When it
-is enabled, the loop does this near the top of each turn:
-
-```mermaid
-flowchart TD
-    Tools[Partition visible tools] --> Estimate[Estimate messages + tool-definition tokens]
-    Estimate --> Under{Under threshold?}
-    Under -- Yes --> Keep[Keep context as-is]
-    Under -- No --> Grown{Grown past low-water mark?}
-    Grown -- No --> Keep
-    Grown -- Yes --> Prune[Prune stale large tool outputs]
-    Prune --> Recheck{Back under threshold?}
-    Recheck -- Yes --> KeepPruned[Use pruned context]
-    Recheck -- No --> Summarize[Summarize oldest middle]
-    Summarize --> Replace[system messages + summary + recent suffix]
-```
-
-The trigger is intentionally approximate:
-
-- Zero estimates request size using message text, images, tool-call arguments, and
-  the tool definitions advertised on that turn.
-- The proactive threshold is roughly **two-thirds of the context window**.
-- Provider usage from completed turns is used to calibrate the rough estimate over
-  time, so the budget gauge and compaction decision track the provider more
-  closely after a few turns.
-- A low-water mark prevents the loop from re-summarizing the same already-compacted
-  history on every turn.
-
-When compaction actually runs, it tries to preserve the parts most likely to be
-needed by the model:
-
-- leading system messages stay verbatim;
-- the most recent turns stay verbatim (`CompactionPreserveLast`, defaulting to the
-  agent's normal preserve count);
-- the preserved suffix is widened to a provider-valid turn boundary so tool-result
-  messages are not replayed without their corresponding assistant tool call;
-- the older middle is summarized into one user-role message labeled
-  `[Summary of earlier conversation]`;
-- structured state that should not be paraphrased away, such as active plan/loaded
-  skill state, is preserved alongside the prose summary.
-
-There are two compaction paths:
-
-1. **Proactive compaction** runs before the provider call when the estimated
-   request is over threshold.
-2. **Reactive compaction** runs after a provider returns a context-limit style
-   error. Zero compacts once and retries that same turn; if the provider still
-   rejects the request, the error is surfaced rather than looping forever.
-
-Compaction failures are conservative. If the summarizer fails during proactive
-compaction, Zero keeps the original messages and tries to continue. It does not
-drop conversation history just to make room.
-
-## Presentation Layer: Bubble Tea TUI
-
-`internal/tui` is a Bubble Tea application. The usual Bubble Tea shape applies:
-
-```mermaid
-flowchart LR
-    Init[model.Init] --> Update[model.Update]
-    Update --> View[model.View]
-    View --> Terminal[Terminal frame]
-    Terminal --> Msg[tea.Msg: key, mouse, window, agent event]
-    Msg --> Update
-```
-
-The TUI is intentionally not the agent brain. It is responsible for:
-
-- collecting user input from the composer;
-- rendering assistant text, reasoning, tool cards, permissions, plans, usage,
-  files, and sidebars;
-- handling slash commands and modal surfaces;
-- converting agent callbacks into Bubble Tea messages;
-- persisting visible session events;
-- allowing live provider/model/permission changes.
-
-When a prompt is submitted, the TUI starts a background command that invokes
-`agent.Run`. Streaming callbacks send messages back into the Bubble Tea update
-loop, so rendering remains responsive while the agent is working.
-
-## How the TUI and Agent Loop Connect
-
-A common source of confusion is that Zero has two event loops running at once:
-
-1. **Bubble Tea loop** — owns terminal input, in-memory UI state, and frames.
-2. **Agent loop** — owns model turns, tool execution, permissions, retries, and
-   stop conditions.
-
-They are connected by `tea.Cmd` and `agent.Options` callbacks. The TUI never
-runs provider/tool logic directly inside `Update`; instead, submit handling gates
-and dispatches a prompt, the TUI starts a background command, and that command
-calls `agent.Run` with callbacks that send runtime events back to the Bubble Tea
-program. Function names in this section are illustrative code anchors, not API
-boundaries.
-
-```mermaid
-sequenceDiagram
-    participant User
-    participant TUI as Bubble Tea model<br/>internal/tui
-    participant Cmd as tea.Cmd goroutine<br/>runAgentWithOptions
-    participant Agent as agent.Run<br/>internal/agent
-    participant Provider as Provider.StreamCompletion
-    participant Tools as Tool registry + sandbox
-    participant Store as Session store
-
-    User->>TUI: type prompt / press Enter
-    TUI->>TUI: validate/gate submit and append visible user row
-    TUI->>Cmd: launch tea.Cmd with runID + cancellable context
-    Cmd->>Agent: agent.Run(prompt, provider, options)
-    Agent->>Provider: stream completion request
-    Provider-->>Agent: text / reasoning / tool-call deltas
-    Agent-->>Cmd: OnText / OnReasoning / OnToolCallStart callbacks
-    Cmd-->>TUI: runtimeMessageSink(tea.Msg)
-    TUI->>TUI: Update appends/updates transcript rows
-    TUI-->>User: View renders new frame
-
-    Agent->>Tools: execute collected tool call
-    Tools->>Tools: permission, sandbox, hooks, redaction
-    Tools-->>Agent: tool result
-    Agent-->>Cmd: OnToolCall / OnToolResult / OnPermission / OnUsage
-    Cmd->>Store: batch session events for resume/history
-    Cmd-->>TUI: final agentResponseMsg
-    TUI->>TUI: mark run complete, flush rows/events, unlock composer
-```
-
-In the TUI path, the same event can have three representations:
-
-| Runtime thing | Agent representation | TUI representation | Session representation |
-| --- | --- | --- | --- |
-| Assistant text | streamed provider text forwarded through `OnText` | incremental assistant row text | assistant message event |
-| Reasoning preview | `OnReasoning` callback | collapsible/preview reasoning row | usually not the same as final assistant text |
-| Tool call | `agent.ToolCall` from collected provider stream | tool card, specialist card, or plan panel update | `EventToolCall` |
-| Tool result | `agent.ToolResult` | result card/status, changed files, plan/specialist updates | `EventToolResult` |
-| Permission prompt/audit | `PermissionRequest` / `PermissionEvent` | modal prompt or permission row | permission request/decision events |
-| Usage/context | provider usage + measured context | context gauge / usage metadata | usage event |
-
-### One interactive turn, end to end
-
-For a normal prompt in the interactive TUI:
-
-1. Submit handling validates composer state and command gates, then dispatches
-   the prompt to the launch path.
-2. The launch path appends immediate UI rows, creates a cancellable run context,
-   and starts `runAgent` as a `tea.Cmd`; run bookkeeping assigns the `runID` used
-   to correlate later events.
-3. `runAgentWithOptions` copies the current UI-controlled runtime choices into
-   `agent.Options`: provider/model labels, permission mode, cwd, session ID,
-   images, registry, response style, context window, and self-correction hooks.
-4. The command wraps agent callbacks. For example:
-   - `OnText` sends incremental assistant text into the TUI message sink.
-   - `OnToolCallStart` / `OnToolCallDelta` show live tool-argument streaming.
-   - `OnToolCall` creates visible tool rows and appends session events.
-   - `OnToolResult` creates result rows, updates plan/specialist side panels, and
-     records changed files.
-   - `OnPermissionRequest` sends a prompt to the TUI and blocks the agent loop
-     until the user answers or the run context is cancelled.
-   - `OnAskUser` does the same for model-initiated clarification questions.
-5. `agent.Run` builds provider-neutral messages and tool definitions, streams a
-   provider response, executes any requested tools through the registry/sandbox,
-   appends tool results back into the model conversation, and repeats until it has
-   a final answer or a stop condition.
-6. When `agent.Run` returns, the command emits `agentResponseMsg`. The Bubble Tea
-   loop marks the run complete, flushes queued rows/session events, updates usage
-   and file state, and re-enables the composer.
-
-The important architectural point: **the TUI is stateful and reactive, but the
-agent loop is the source of runtime truth for model/tool progress**. Presentation
-state is derived from callback events and persisted session events; workspace
-changes happen only through tools executed by the agent runtime.
-
-### Feature flows use the same bridge
-
-For one interactive turn, the supporting systems do not run beside the TUI/agent
-loop; they run inside or around it:
-
-```mermaid
-flowchart TD
-    Submit[TUI submit] --> Options[Build agent.Options]
-    Options --> Context[Assemble context<br/>config, guidelines, history, skills]
-    Context --> ProviderCall[Provider stream]
-    ProviderCall --> StreamEvents[Text/reasoning/tool-call events]
-    StreamEvents --> Render[TUI render callbacks]
-
-    ProviderCall --> ToolCall{Tool call?}
-    ToolCall -- No --> Final[Final response]
-    ToolCall -- Yes --> ToolGate[Tool gate<br/>filters, permissions, sandbox]
-    ToolGate --> HooksBefore[beforeTool hooks]
-    HooksBefore --> Execute[Tool / MCP / specialist / plugin]
-    Execute --> HooksAfter[afterTool hooks]
-    HooksAfter --> ToolResult[Tool result message]
-    ToolResult --> Persist[Session events]
-    ToolResult --> Context
-
-    Final --> Persist
-    Persist --> Resume[Resume / fork / rewind / parent metadata]
-```
-
-Most interactive features are variations of that same bridge rather than separate
-architectures:
-
-- **Slash commands** either mutate TUI state directly (`/model`, `/permission`,
-  `/help`) or start short `tea.Cmd` jobs that later return a message to `Update`
-  (`/doctor`, `/search`, `/compact`, session commands).
-- **Permissions** sit between a model-requested tool call and actual execution:
-  the agent blocks on `OnPermissionRequest`, the TUI surfaces a modal and sends
-  the decision back through a channel, and the session log records the
-  request/decision events.
-- **Plans, specialists/sub-agents, and ask-user prompts** all follow the same
-  runtime pattern: the model requests a capability, the agent records the
-  call/result in its conversation, and the TUI mirrors the visible state as plan
-  panels, specialist cards, or question forms. Specialist session metadata can
-  carry parent/root and sub-agent/spec fields, with richer linkage depending on
-  the specialist or swarm path.
-- **Streaming tool writes** start as provider tool-call deltas before execution;
-  the TUI shows the arguments live, then replaces/augments them with the actual
-  `ToolResult` after the tool runs.
-- **Compaction** is an agent-loop context-management step; the TUI may show that
-  it happened, but the purpose is to keep the next provider request within budget.
-- **Stream-JSON** is another surface over the same callbacks: `zero exec`
-  serializes the events as JSON protocol events instead of Bubble Tea views.
-
-So a feature-specific deep dive should usually explain: what user event starts it,
-which `tea.Msg`/callback carries it, which agent/tool event is authoritative, and
-which session events make it resumable.
-
-## Runtime Provider Layer
-
-Providers are hidden behind this interface in `internal/zeroruntime`:
-
-```go
-type Provider interface {
-    StreamCompletion(ctx context.Context, request CompletionRequest) (<-chan StreamEvent, error)
-}
-```
-
-The agent loop only knows about provider-neutral messages, tool definitions,
-stream events, reasoning blocks, images, and token usage. Provider adapters in
-`internal/providers/*` translate those neutral types to provider-specific APIs:
-
-- OpenAI and OpenAI-compatible APIs;
-- Anthropic and Anthropic-compatible APIs;
-- Gemini;
-- Codex / ChatGPT OAuth-backed runtime.
-
-`internal/providers.New` resolves the configured model through the model
-registry/catalog, normalizes API model IDs and base URLs, attaches API keys or
-OAuth resolvers, and returns the concrete adapter.
-
-## Tools and Capabilities
-
-Tools implement a common interface and are registered by name in
-`internal/tools.Registry`.
-
-```mermaid
-flowchart TD
-    AgentToolCall[Tool call from model] --> Decode[Decode JSON args]
-    Decode --> Filter[Enabled/disabled + permission-mode filter]
-    Filter --> Precheck[Pre-permission rejecters]
-    Precheck --> SandboxEval[Sandbox Evaluate]
-    SandboxEval --> Prompt{Needs user approval?}
-    Prompt -- Yes --> Decision[Permission callback]
-    Prompt -- No --> Run[Registry.RunWithOptions]
-    Decision --> Run
-    Run --> Redact[Redact secrets]
-    Redact --> Budget[Token-aware semantic output budget]
-    Budget --> Ceiling[Existing hard byte ceiling]
-    Ceiling --> Message[Return one tool result to model]
-```
-
-Oversized results use deterministic, provider-neutral estimated-token budgets.
-Policies retain useful structure for files, search matches, tests, process logs,
-diffs, and worker conclusions; tools without a declared category use a UTF-8-safe
-head/tail fallback. The estimate is intentionally conservative for non-ASCII
-text and is not exact provider tokenization. Existing byte ceilings remain the
-authoritative safety limit. When the existing spill mechanism can persist the
-complete redacted text received by the budgeting layer, the result includes its
-safe spill reference. This does not imply capture of subprocess bytes already
-discarded by a tool's established internal buffer.
-
-Core tool groups include:
-
-- **Read-only tools**: file reads, directory listing, glob, grep, LSP navigation,
-  skills, `ask_user`, permission requests.
-- **Write tools**: `write_file`, `edit_file`, `apply_patch`, `update_plan`.
-- **Shell tools**: `exec_command`, `write_stdin`, legacy `bash`.
-- **Network tools**: `web_fetch` and optional web search backend. `web_fetch`
-  validates the URL before the permission prompt, refuses loopback/private/
-  special-use addresses, and dials the address it resolved. With
-  `HTTP_PROXY`/`HTTPS_PROXY` set, the proxy is dialed instead and resolves the
-  target itself, so destination enforcement ends at the proxy; see the note in
-  the README.
-- **Local-control tools**: config-gated wrappers for browser, terminal, desktop,
-  and artifact helpers backed by packages such as `internal/localcontrol` and
-  `internal/browser`.
-- **Extension tools**: MCP tools, specialists/sub-agents, swarm tools, plugins.
-
-Tool definitions include safety metadata: side-effect class, permission level,
-reason, and whether prompt-gated tools are advertised in auto-like modes. The
-agent uses this metadata plus per-turn filters and deferred-loading state to
-choose which registered tools the model can see and whether a call can run
-immediately.
-
-## Permission and Sandbox Model
-
-Zero has two related but separate checks:
-
-1. **Tool permission metadata** says whether a tool is allowed, denied, or needs
-   approval.
-2. **Sandbox policy** evaluates the actual request: path scope, network access,
-   destructive shell patterns, explicit escalation, persistent/session grants,
-   and platform isolation availability.
-
-```mermaid
-flowchart TD
-    Call[Tool call] --> Safety[Tool Safety metadata]
-    Call --> Scope[Workspace/additional roots scope]
-    Safety --> Engine[Sandbox Engine Evaluate]
-    Scope --> Engine
-    Engine --> Allow[Allow]
-    Engine --> Prompt[Prompt user]
-    Engine --> Deny[Deny]
-    Prompt --> Grant[Turn/session/persistent grant]
-    Grant --> Execute[Execute tool]
-    Allow --> Execute
-    Deny --> Result[Return denied tool result]
-```
-
-The sandbox engine can:
-
-- auto-allow workspace writes for safe file-edit tools;
-- block reads/writes outside the allowed scope;
-- prompt for recoverable outside-workspace access;
-- deny or prompt for network depending on policy;
-- detect destructive shell commands;
-- run shell commands through a platform backend when available;
-- remember session or persistent grants;
-- support narrow command-prefix approvals.
-
-The user-facing TUI and `zero exec` mode both route permission requests through
-callbacks, but the TUI can show interactive modals while headless mode generally
-returns non-interactive fallback behavior unless a protocol/client handles it.
-
-## Session Storage and History
-
-Sessions live locally under Zero's data directory. A session directory contains:
-
-- `metadata.json` — session ID, title, cwd, provider/model, parent/root IDs,
-  spec/sub-agent fields, timestamps, and event count.
-- `events.jsonl` — append-only event log with messages, tool calls/results,
-  permissions, usage, checkpoints, forks, compaction, and specs. TUI and exec use
-  the richer event stream; ACP currently records conversational message history
-  while streaming tool and permission updates to the client.
-
-```mermaid
-flowchart LR
-    TUI[TUI callbacks] --> Store[internal/sessions.Store]
-    Exec[exec recorder] --> Store
-    Store --> Metadata[metadata.json]
-    Store --> Events[events.jsonl]
-    Events --> Resume[resume]
-    Events --> Fork[fork]
-    Events --> Rewind[rewind/checkpoints]
-    Events --> Children[parent/root metadata]
-```
-
-This is why sessions can be resumed, forked, rewound, and inspected without a
-remote service. Zero stores the local event history; providers only receive the
-messages needed for the current completion request.
-
-## Stream-JSON Protocol
-
-`zero exec --output-format stream-json` emits newline-delimited JSON events for
-integrations and CI. The protocol is implemented in `internal/streamjson` and is
-specified in [STREAM_JSON_PROTOCOL.md](STREAM_JSON_PROTOCOL.md).
-
-Common output event types include:
-
-- `run_start`, `text`, `reasoning`, `tool_call`, `tool_result`;
-- `permission`, `permission_request`, `permission_decision`;
-- `checkpoint`, `restore`, `usage`, `final`, `warning`, `error`, `run_end`.
-
-Input stream-JSON can provide `prompt` or `message` events and image payloads.
-The CLI parses those events, resolves a single prompt, validates/decodes images,
-and passes the result into the same agent loop used everywhere else.
-
-## Extensibility Flow
-
-Zero's extension surfaces are loaded before the agent loop starts:
-
-```mermaid
-flowchart TD
-    Config[Config resolution] --> Registry[Tool registry]
-    Registry --> Core[Core tools]
-    Registry --> MCP[MCP server tools]
-    Registry --> Specialist[Specialist / Task tools]
-    Registry --> Plugin[Plugin tools]
-
-    Config --> Prompt[System prompt context]
-    Prompt --> Guidelines[AGENTS.md / ZERO.md]
-    Prompt --> Skills[Skills list]
-    Prompt --> SpecialistContext[Specialist descriptions]
-
-    ToolLifecycle[Tool lifecycle] --> Hooks[beforeTool / afterTool hooks]
-```
-
-- **Project/user guidelines** become prompt context.
-- **Skills** are instruction packs the model can load on demand.
-- **Specialists** are sub-agents callable through the `Task` tool.
-- **MCP servers** contribute external tools.
-- **Plugins** can add tools, hooks, and skill roots. Bootstrap always registers a
-  multi-root skill tool: primary Zero skills dir, optional `~/.agents/skills`,
-  then plugin skill roots (earlier wins). `internal/skills` owns that merge via
-  `LoadFromRoots`; single-root `Load` remains for install/write.
-- **Hooks** can observe or block tool lifecycle events.
-
-## End-to-End Data Flow
-
-A typical interactive edit request looks like this:
-
-```mermaid
-sequenceDiagram
-    participant U as User
-    participant T as TUI
-    participant A as Agent loop
-    participant P as Provider
-    participant R as Tool registry
-    participant S as Sandbox
-    participant FS as Workspace/session files
-
-    U->>T: Type prompt and press Enter
-    T->>A: agent.Run(prompt, provider, options)
-    A->>P: CompletionRequest(messages, tool definitions)
-    P-->>A: Stream text + tool call edit_file
-    A->>S: Evaluate edit_file args
-    S-->>A: allow/prompt/deny decision
-    A->>T: permission callback if prompt needed
-    T-->>A: user decision
-    A->>R: Run edit_file
-    R->>FS: Write workspace file
-    R-->>A: Tool result + changed files
-    A->>P: Next CompletionRequest with tool result
-    P-->>A: Final answer
-    A-->>T: Result + callbacks
-    T->>FS: Append session events
-    T-->>U: Render final transcript
-```
-
-The same request in `zero exec` follows the same provider/tool/sandbox path, but
-streaming events are written to stdout/stderr instead of rendered in Bubble Tea.
-
-## Mental Model
-
-When you work on Zero, start by locating the change on the four-layer spine from
-[Architecture Spine](#architecture-spine) — Surface, Agent loop, Capabilities,
-Persistence — then jump to the package that owns that boundary:
-
-- UI behavior? Start in `internal/tui`.
-- Command-line behavior? Start in `internal/cli`.
-- Model/tool-turn behavior? Start in `internal/agent`.
-- A new capability? Register a tool in `internal/tools` or an extension surface.
-- Safety policy? Start in `internal/sandbox` and agent permission wiring.
-- Resume/history behavior? Start in `internal/sessions` and session recorders.

docs/INSTALL.md

@@ -1,103 +1,27 @@
-# Installing Zero
+# Zero Install Scripts
 
-Pick whichever fits how you already install things. None of these is the
-blessed one.
+Zero release archives are published as:
 
-| Method | Command | Self-update |
-| --- | --- | --- |
-| Install script (Linux, macOS) | `curl -fsSL https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.sh \| bash` | `zero upgrade` |
-| Install script (Windows) | `irm https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.ps1 \| iex` | `zero upgrade` |
-| npm | `npm install -g @twigpine/zero` | `zero upgrade` (runs npm) |
-| Release archive | download from [Releases](https://github.com/Twigpine/zero/releases) | `zero upgrade` |
-| mise | `mise use -g ubi:Twigpine/zero` | `mise upgrade` |
-| `go install` | `go install github.com/Gitlawb/zero/cmd/zero@latest` | rerun the command |
-| Source | `go build -o zero ./cmd/zero` | rebuild |
+- `zero-v<version>-linux-<arch>.tar.gz`
+- `zero-v<version>-macos-<arch>.tar.gz`
+- `zero-v<version>-windows-<arch>.zip`
 
-`zero upgrade` follows whatever owns the binary, with one exception it cannot
-detect. It delegates to npm for an npm install, refuses outright for a Homebrew
-keg and names `brew upgrade zero`, and replaces the binary in place for
-everything else — including a mise-managed one, which is the exception.
+Each archive must have a matching `.sha256` file. The install scripts download both files and verify the checksum before copying the binary.
 
-mise is the one case it cannot detect: a mise-managed binary is an ordinary
-standalone install on disk, so `zero upgrade` will replace it and leave mise
-describing a version that is no longer there. Use `mise upgrade` instead.
-
-Release archives are the substrate for most of the above: the install scripts
-and the npm fallback both download a platform archive from a published GitHub
-Release and verify its checksum.
-
-## npm
+Maintainers can verify the release directory before upload:
 
 ```bash
-npm install -g @twigpine/zero
-zero
+go run ./cmd/zero-release package
+go run ./cmd/zero-release verify
 ```
 
-The package supports Linux and macOS on x64 and arm64, and Windows on x64
-(Windows on ARM runs the x64 build under emulation). It installs a small
-`zero` wrapper plus, as an optional dependency, a platform payload with the
-native binary and the bundled browser/terminal control helpers. There are no
-install scripts and nothing is downloaded from outside the npm registry, so
-the install is silent and works identically under npm, Bun, pnpm, and yarn —
-no trust or approval steps. See [NPM_PACKAGING.md](NPM_PACKAGING.md) for the
-package architecture.
+`verify:release` requires every archive in `dist/release` to have a same-directory `.sha256` file whose contents are:
 
-Requirements:
-
-- Node.js 18+
-- network access to npm
-
-If the install skipped optional dependencies (`npm install --omit=optional`,
-or a package manager configured to do so), the wrapper falls back to
-downloading the binary from the matching GitHub Release, with checksum
-verification. The fetch is retried on each run until a binary is in place (a
-transient network failure heals itself; an install directory the current user
-cannot write to keeps failing — rerun the install or the command below with
-sufficient permissions). To trigger the fetch manually:
-
-```bash
-node "$(npm root -g)/@twigpine/zero/scripts/postinstall.mjs"
+```text
+<sha256>  <archive-name>
 ```
 
-### Moving from @gitlawb/zero
-
-Zero was published as `@gitlawb/zero` up to 0.9.0. From 0.10.0 it is
-`@twigpine/zero`, and the old name gets no further releases.
-
-Both packages provide the `zero` command, so npm refuses to install the new
-one while the old one is installed (`EEXIST`). Forcing it is worse: a later
-uninstall of the old package removes the shared `zero` command. Quit any
-running `zero` (on Windows a running `zero.exe` cannot be removed), then
-uninstall the old package before installing the new one:
-
-```bash
-npm uninstall -g @gitlawb/zero
-npm install -g @twigpine/zero
-```
-
-With another package manager, the same two steps:
-
-```bash
-bun remove -g @gitlawb/zero && bun add -g @twigpine/zero
-pnpm remove -g @gitlawb/zero && pnpm add -g @twigpine/zero
-yarn global remove @gitlawb/zero && yarn global add @twigpine/zero
-```
-
-Config, sessions, logins, and plugins live in your user config and home
-directories, not in the package, so they carry over unchanged.
-
-0.10.0 was also published once as `@gitlawb/zero`, so an old install that
-updates lands on a working build. That build prints these steps when `zero`
-exits in a terminal, and `zero upgrade` and `zero update --check` print them
-too.
-
-## Linux And macOS Script
-
-Install the latest release:
-
-```bash
-curl -fsSL https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.sh | bash
-```
+## Linux And macOS
 
 From a checkout:
 
@@ -109,31 +33,29 @@ Install a specific version:
 
 ```bash
 ZERO_VERSION=0.1.0 scripts/install.sh
-scripts/install.sh --version 0.1.0
 ```
 
-Install somewhere else:
+Install to a custom directory:
 
 ```bash
 ZERO_INSTALL_DIR="$HOME/bin" scripts/install.sh
-scripts/install.sh --install-dir "$HOME/bin"
+```
+
+Install from a fork or internal repository:
+
+```bash
+scripts/install.sh --repo owner/repo
 ```
 
 Defaults:
 
-- Repository: `Twigpine/zero`
+- Repository: `Gitlawb/zero`
 - Version: latest GitHub release
 - Install path: `~/.local/bin/zero`
 
-Requirements: Bash, `curl` or `wget`, `tar`, and `shasum` or `sha256sum`.
+Requirements: `curl` or `wget`, `tar`, and `shasum` or `sha256sum`.
 
-## Windows PowerShell Script
-
-Install the latest release:
-
-```powershell
-irm https://raw.githubusercontent.com/Twigpine/zero/main/scripts/install.ps1 | iex
-```
+## Windows
 
 From a checkout:
 
@@ -147,208 +69,30 @@ Install a specific version:
 powershell -ExecutionPolicy Bypass -File scripts/install.ps1 -Version 0.1.0
 ```
 
-Install somewhere else:
+Install to a custom directory:
 
 ```powershell
 powershell -ExecutionPolicy Bypass -File scripts/install.ps1 -InstallDir "$env:USERPROFILE\bin"
 ```
 
+Install from a fork or internal repository:
+
+```powershell
+powershell -ExecutionPolicy Bypass -File scripts/install.ps1 -Repository owner/repo
+```
+
 Defaults:
 
-- Repository: `Twigpine/zero`
+- Repository: `Gitlawb/zero`
 - Version: latest GitHub release
 - Install path: `%LOCALAPPDATA%\zero\bin\zero.exe`
 
-## mise
-
-[mise](https://mise.jdx.dev/) installs Zero straight from the GitHub Release
-archives through its `ubi` backend, so there is nothing extra to publish and no
-registry in the middle:
-
-```bash
-mise use -g ubi:Twigpine/zero
-```
-
-Pin a version the same way you would any other tool:
-
-```bash
-mise use -g ubi:Twigpine/[email protected]
-```
-
-Updates come from `mise upgrade`. `zero upgrade` also works, because a
-mise-managed binary is an ordinary standalone install, but then mise's records
-describe a version that is no longer on disk. Prefer `mise upgrade`.
-
-## go install
-
-```bash
-go install github.com/Gitlawb/zero/cmd/zero@latest
-```
-
-This builds from source, so it needs Go 1.26.9+ and it does not go through the
-release archives. Two consequences worth knowing before you pick it:
-
-- On Linux you also need the sandbox helper, which is a separate binary and is
-  not installed by this command. See
-  [Sandbox Helpers For Source Builds](#sandbox-helpers-for-source-builds).
-  Without it, native sandboxing is unavailable.
-- `zero upgrade` treats the result as a standalone install and will replace the
-  binary with a release build rather than rebuilding from source. If you chose
-  `go install` deliberately, rerun it instead.
-
-macOS and Windows need no extra helper.
-
-## From Source
-
-```bash
-git clone https://github.com/Twigpine/zero.git
-cd zero
-go run ./cmd/zero
-```
-
-Build a local binary:
-
-```bash
-go build -o zero ./cmd/zero
-```
-
-Source builds require Go 1.26.9+.
-
-### Sandbox Helpers For Source Builds
-
-Release archives include the platform sandbox helpers. If you build directly
-from source, build the helpers you need:
-
-Linux:
-
-```bash
-go build -o zero ./cmd/zero
-go build -o zero-linux-sandbox ./cmd/zero-linux-sandbox
-go build -o zero-seccomp ./cmd/zero-seccomp
-```
-
-Put `zero` and `zero-linux-sandbox` in the same directory on `PATH`, for example
-`~/.local/bin`. `zero-seccomp` is kept as a compatibility wrapper; the sandbox
-helper applies the Unix-socket filter itself when that sandbox option is enabled.
-Linux native sandboxing also requires Bubblewrap to be installed.
-
-macOS uses the system sandbox and does not need an extra helper binary.
-
-### Termux (Android)
-
-Zero can run natively on Android via [Termux](https://termux.dev/). Build with
-`GOOS=android` to avoid the `faccessat2` syscall that is blocked by Samsung's
-seccomp filter on Android:
-
-```bash
-# Install Go in Termux
-pkg install golang
-
-# Build Zero for Android
-git clone https://github.com/Twigpine/zero.git
-cd zero
-CGO_ENABLED=0 GOOS=android GOARCH=arm64 go build -ldflags="-s -w" -o zero ./cmd/zero
-
-# Move into PATH
-mv zero ~/.local/bin/
-```
-
-> **Why `GOOS=android`?** Go 1.26+ detects `runtime.GOOS == "android"` and skips
-> the `faccessat2` syscall inside `os/exec.findExecutable`, falling back to
-> permission-bit checks. Without this flag, Android's seccomp sends SIGSYS and
-> kills the process whenever Zero looks up a binary on `PATH` (git, sh, etc.).
-
-**DNS.** Android does not expose `/etc/resolv.conf`. Go's pure-Go DNS resolver
-needs one. Use `proot` to bind-mount Termux's resolver config:
-
-```bash
-pkg install proot
-proot -b "$PREFIX/etc/resolv.conf:/etc/resolv.conf" zero
-```
-
-Create a wrapper at `~/.local/bin/zero` to avoid typing proot every time:
-
-```bash
-#!/data/data/com.termux/files/usr/bin/bash
-exec proot -b "$PREFIX/etc/resolv.conf:/etc/resolv.conf" ~/.local/bin/zero.bin "$@"
-```
-
-**Scroll.** On native Termux (not under PRoot), mouse scrolling works out of the
-box. The TUI uses Bubble Tea's `AllMotion` mouse mode by default. If you run Zero
-inside PRoot (e.g. through proot-distro), the scroll fix activates `CellMotion`
-to avoid PRoot's ptrace interference with the 1003 escape sequence.
-
-**Providers.** Zero works with any OpenAI-compatible provider on Termux. For
-example, to use OpenCode Zen's free tier:
-
-```bash
-zero providers add opencode \
-  --name opencode \
-  --model deepseek-v4-flash-free \
-  --base-url https://opencode.ai/zen/v1 \
-  --set-active
-```
-
-Windows source builds can use the main `zero.exe` as the command runner and setup
-helper through Zero's built-in self-dispatch path. If you want a release-style
-layout anyway, build the standalone helper executables next to `zero.exe`:
-
-```powershell
-go build -o zero.exe ./cmd/zero
-go build -o zero-windows-command-runner.exe ./cmd/zero-windows-command-runner
-go build -o zero-windows-sandbox-setup.exe ./cmd/zero-windows-sandbox-setup
-```
-
-## Release Archive Format
-
-Release archives are named:
-
-- `zero-v<version>-linux-<arch>.tar.gz`
-- `zero-v<version>-macos-<arch>.tar.gz`
-- `zero-v<version>-windows-<arch>.zip`
-
-Supported targets:
-
-- `linux-x64`
-- `linux-arm64`
-- `macos-x64`
-- `macos-arm64`
-- `windows-x64` (Windows on ARM runs this build under emulation)
-
-Each archive must have a matching `.sha256` file. The install scripts download
-both files, verify the checksum, and then copy the binary into the install
-directory.
-
 ## Updating
 
-Check for a newer release, then download, verify, and install it in place:
+Check whether a newer release exists:
 
 ```bash
 zero update --check
-zero upgrade
 ```
 
-See the [update guide](UPDATE.md) for update modes, flags, and platform details.
-
-`zero upgrade` behaves differently depending on how Zero was installed, because
-overwriting a binary a package manager owns leaves that manager describing a
-version that is no longer there:
-
-- **npm**: runs `npm install -g @twigpine/zero@latest` for you. An install of
-  the old `@gitlawb/zero` package refuses instead and prints the steps in
-  [Moving from @gitlawb/zero](#moving-from-gitlawbzero): that name gets no
-  further releases, so npm would only reinstall the same version.
-- **Homebrew**: refuses, and tells you to run `brew upgrade zero`. Replacing the
-  keg binary directly would be reverted by the next `brew upgrade` or
-  `brew reinstall`.
-- **everything else**: downloads the verified release archive and replaces the
-  binary in place.
-
-Homebrew is detected by the binary living inside a Cellar keg that carries
-Homebrew's own `INSTALL_RECEIPT.json`. The keg shape alone is not enough: a
-directory tree you built yourself can have exactly that shape, and refusing to
-update an install Homebrew never touched would be a real cost for a made-up
-reason. The receipt is the thing only Homebrew writes.
-
-An ordinary install under `/usr/local/bin` is left alone even on an Intel Mac
-where that is also the Homebrew prefix.
+For M2, updates are check-only. Re-run the installer to replace the local binary after reviewing the release.

docs/M1_HEADLESS_EXEC_PRD.md

@@ -0,0 +1,87 @@
+# M1 Headless Exec PRD
+
+Status: Draft
+Owner: Vasanth
+Milestone: M1
+Scope: `zero exec` CLI surface
+
+## Goal
+
+Ship the first production-shaped headless command for Zero:
+
+```sh
+zero exec "inspect this repo and summarize the next fix"
+```
+
+This command should be useful for local scripts, CI smoke runs, and later VS Code integration without pulling in the full future protocol, session, MCP, sandbox, or plugin roadmap.
+
+## Non-Goals
+
+- No daemon mode.
+- No JSON-RPC input protocol.
+- No MCP, plugin, marketplace, or subagent support.
+- No session resume/fork/search.
+- No new provider adapters in this slice.
+- No architecture rewrite of the agent loop.
+
+## User Stories
+
+1. As a CLI user, I can run one prompt headlessly and receive the assistant answer on stdout.
+2. As a script author, I can choose `text` or JSONL output.
+3. As a reviewer, I can see tool activity without corrupting text stdout.
+4. As a model tester, I can override the configured model for one run.
+5. As a cautious user, prompt-gated tools stay disabled unless I pass an explicit unsafe flag.
+
+## CLI Contract
+
+```sh
+zero exec [prompt...] [options]
+```
+
+Options for M1:
+
+- `-f, --file <path>`: read the prompt from a file.
+- `-m, --model <model>`: override the configured model for this run.
+- `-C, --cwd <path>`: run from another working directory.
+- `-o, --output-format <text|json>`: choose stdout format.
+- `--skip-permissions-unsafe`: grant prompt-gated tools for this run.
+
+The existing `zero -p "prompt"` shortcut remains as a compatibility path and should call the same runner.
+
+## Output Contract
+
+Text mode:
+
+- stdout contains assistant text only.
+- stderr contains tool rows, warnings, and errors.
+
+JSON mode:
+
+- stdout is newline-delimited JSON events.
+- Required event types for this slice: `run_start`, `text`, `tool_call`, `tool_result`, `final`, `warning`, `error`, `done`.
+
+## Exit Codes
+
+- `0`: success
+- `1`: unexpected crash
+- `2`: usage error
+- `3`: provider/config/runtime error
+- `4`: reserved for future tool failure policy
+- `5`: reserved for future permission-denied policy
+
+## Permission Behavior
+
+Default headless mode advertises only tools marked `permission: "allow"`.
+
+`--skip-permissions-unsafe` advertises tools that are not marked `deny` and grants prompt-gated tools through `ToolRegistry.run`. It must not bypass schema validation or direct tool execution safeguards.
+
+## Acceptance Criteria
+
+- `go test ./...` passes.
+- `go run ./cmd/zero-release build` passes.
+- `go run ./cmd/zero-release smoke` passes.
+- `zero exec --help` documents the M1 flags.
+- Usage errors do not initialize providers.
+- Provider failures return exit code `3`.
+- Normal mode does not advertise `bash`, `write_file`, `edit_file`, or `apply_patch`.
+- Unsafe mode still uses the registry execution path.

docs/MODEL_RPM.md

@@ -1,26 +0,0 @@
-# Local per-model completion limits
-
-Add `modelRPM` to the existing Zero config file:
-
-```json
-{"modelRPM": {"gpt-4.1": 30, "claude-sonnet-4.5": 15}}
-```
-
-Keys resolve through the model registry; custom IDs match exactly after trimming
-whitespace. Missing keys and zero mean unlimited. Negative limits and conflicting
-aliases are configuration errors. Project config may add or tighten a user cap,
-but cannot relax it. Changes take effect on the next Zero process start.
-
-For `zero exec` and interactive agent turns, admission happens immediately before
-the wrapped turn session's `Stream`. N admissions fit in any sliding 60-second
-window; N+1 returns a local rate-limit error before entering that method. The
-error reports when a slot expires. Exec uses its existing provider-error exit
-code plus a local-limit hint. There is no sleep or hidden retry. Failed admitted
-requests still consume a slot.
-
-Sessions and model switches share a limiter in one process. Separate processes
-have independent windows; restarting clears them. This is not an account-wide
-cap. It counts Stream admissions, not all HTTP requests: setup/prewarm,
-compaction, provider-internal retries, discovery and direct calls outside that
-boundary are not counted. No TPM, cost budgets, persistence, cross-process
-coordination or new runtime/Python dependency is introduced.

docs/NPM_PACKAGING.md

@@ -1,239 +0,0 @@
-# npm packaging
-
-How `@twigpine/zero` is put together on npm, why it is shaped this way, and the
-rules the release pipeline must follow. Read this before touching
-`package.json`, `bin/zero.js`, `scripts/postinstall.mjs`,
-`scripts/npm/build-platform-packages.mjs`, or the npm-publish steps of
-`release-artifacts.yml`.
-
-## Goals
-
-A `npm install -g @twigpine/zero` must be **silent and self-contained**:
-
-- No `EBADENGINE` warnings — ours or from any package in the dependency tree.
-- No install scripts anywhere in the tree, so npm's `allow-scripts` gating,
-  Bun's blocked-by-default lifecycle scripts, and pnpm's strict mode all
-  install zero without prompts, trust ceremonies, or broken binaries.
-- No network fetches outside the npm registry at install time. GitHub being
-  down or rate-limited must not break `npm install`.
-- Browser control (`agent-browser`) and terminal control (`tuistory`) work out
-  of the box.
-
-## Architecture
-
-The model is the one used by Codex, esbuild, and Biome: a tiny wrapper package
-plus per-platform payloads carrying the native binaries.
-
-```
-@twigpine/zero                    <- wrapper: bin/zero.js + optionalDependencies
-├─ @twigpine/zero-darwin-arm64 -> npm:@twigpine/zero@{version}-darwin-arm64
-├─ @twigpine/zero-darwin-x64   -> npm:@twigpine/zero@{version}-darwin-x64
-├─ @twigpine/zero-linux-arm64  -> npm:@twigpine/zero@{version}-linux-arm64
-├─ @twigpine/zero-linux-x64    -> npm:@twigpine/zero@{version}-linux-x64
-└─ @twigpine/zero-win32-x64    -> npm:@twigpine/zero@{version}-win32-x64
-```
-
-- The platform "packages" are **versions of the same `@twigpine/zero` package**,
-  published at suffixed versions (`0.4.0-linux-x64`) and referenced through
-  `npm:` aliases in `optionalDependencies`. One package name means one npm
-  trusted-publisher configuration — no new publish credentials per platform.
-  The alias suffixes use Node's `process.platform`/`process.arch` names so
-  `bin/zero.js` can derive its platform package directly.
-- Each platform version sets `os` and `cpu`, so npm installs exactly one of
-  them and skips the rest.
-- A platform payload is assembled from the platform's release archive by
-  `scripts/npm/build-platform-packages.mjs` and contains the `zero` binary,
-  the platform's sandbox helpers, and the vendored `helpers/` tree (see
-  below). It has no `bin`, no scripts, and no dependencies — it is inert on
-  its own; the wrapper execs the binary out of it.
-- The published wrapper has **no scripts and no dependencies** — the
-  assembly script strips both from the repo `package.json` and injects the
-  exact-version `optionalDependencies`. (The repo `package.json` keeps
-  `agent-browser`/`tuistory` in `dependencies` purely as the version pins for
-  the vendored helpers tree; they are never installed by consumers.)
-- There is **no windows-arm64 build** (matches the release matrix); Windows on
-  ARM runs the x64 build under emulation via the first-run fallback.
-
-### Binary resolution in `bin/zero.js`
-
-1. Resolve `@twigpine/zero-<platform>-<arch>` and exec the `zero` binary from
-   it. This wins over any previously downloaded copy — the platform version is
-   pinned to the wrapper release.
-2. Fall back to a binary previously downloaded next to the wrapper.
-3. If neither exists (`--omit=optional`, package managers that skip optional
-   dependencies), run the **fallback downloader**: `scripts/postinstall.mjs`,
-   the exact logic that used to run as a postinstall hook (HTTPS-only, SHA-256
-   verified against the release's own checksum file, no zip-slip), invoked by
-   the wrapper itself. Failures are deliberately not cached — the fetch
-   retries on every run until a binary is in place, so a transient network
-   error self-heals. Platforms with no release asset (anything outside the
-   matrix above, including windows-arm64) skip the attempt entirely rather
-   than probing the network each run.
-4. If the download is impossible too, print build-from-source guidance.
-
-There is deliberately **no `scripts.postinstall`** in any published
-`package.json`. The downloader exists only as a first-run fallback.
-
-### Vendored helpers (`helpers/`)
-
-`agent-browser` (Apache-2.0, vercel-labs/agent-browser) and `tuistory` are
-**vendored binaries/packages inside the platform payload**, not npm
-dependencies of the wrapper:
-
-- As a dependency, agent-browser's `engines: { node: ">=24", pnpm: ">=11" }`
-  and postinstall script produce `EBADENGINE` and `allow-scripts` warnings for
-  every installer. As a vendored tree it produces none, because npm never
-  resolves it.
-- `zero-release package` already stages the helpers tree into every release
-  archive (`stageLocalControlHelpers` runs `npm ci` from the repo's
-  `package.json` pins + lockfile on the native builder). The assembly script
-  reuses that staged tree, so npm installs and `install.sh` installs get
-  identical helpers.
-- The Go binary resolves helpers from `<binary dir>/helpers/node_modules/.bin`
-  on its own (`internal/localcontrol/browser.go`, `adjacentHelper`) — no
-  wrapper involvement, no configuration.
-- **Symlink materialization:** `npm pack` silently drops symlinks, and npm's
-  own `.bin` shims are symlinks on POSIX. The assembly script rewrites every
-  `.bin` symlink into a relocatable `#!/bin/sh` exec shim and dereferences any
-  other symlink, so the vendored tree survives publishing. (Verified
-  empirically; nested `node_modules` under `helpers/` IS packed — only the
-  package-root `node_modules` is always ignored.)
-- **Binary pruning:** agent-browser ships one ~11 MB native binary per
-  platform (7 total). The assembly script keeps only the payload's own
-  platform binary (plus the musl variant on linux, which its launcher detects
-  at runtime) — about 65 MB saved per platform package.
-
-### One package name
-
-The npm name lives in `package.json` and nothing else repeats it:
-`scripts/npm/build-platform-packages.mjs` names the wrapper, the platform
-versions, the alias names, and the alias targets from it, and `bin/zero.js`
-reads its own `package.json` to derive the alias it resolves. The Go side
-needs the name as a constant (`npmPackageName` in
-`internal/update/installmethod.go`), and a test holds it equal to
-`package.json`.
-
-## Publishing rules (release pipeline)
-
-These are the invariants `release-artifacts.yml` must hold. Breaking the first
-one is user-visible immediately. `scripts/npm/publish-packages.sh` implements
-them, and `internal/npmwrapper/publish_test.go` runs it against a fake
-registry.
-
-1. **Platform versions must never become `latest`.** `0.4.0-linux-x64` is a
-   semver *prerelease* of `0.4.0`; publishing it without an explicit
-   non-`latest` dist-tag would clobber `latest` and users would install a
-   platform payload as the CLI. The workflow publishes platform versions with
-   `--tag platform` and asserts `latest` survived before the wrapper publish,
-   then asserts `latest` equals the wrapper version after it. Both lookups
-   tolerate a failed `npm view` (registry lag, or no `latest` tag yet on a
-   bootstrap publish) — a missing value must not abort the job between the
-   platform and wrapper publishes, which would strand a half-published
-   release.
-2. **Platform versions publish before the wrapper.** The wrapper's
-   `optionalDependencies` pin exact suffixed versions; publishing the wrapper
-   first would create a window where installs resolve aliases that 404.
-3. **Exact-version pinning.** The wrapper at `X.Y.Z` references platform
-   versions `X.Y.Z-<platform>-<arch>` exactly — never ranges — so a wrapper
-   and its binaries can never skew. The publish script refuses to start when
-   the wrapper's aliases do not match the platform payloads beside it.
-4. All publishes go through the existing npm OIDC trusted-publishing flow and
-   the `npm-publish` environment gate; no tokens. Because the platform
-   payloads are versions of the same package, they reuse the single
-   trusted-publisher configuration. npm checks provenance against
-   `package.json` `repository`, so it must name the repository the workflow
-   runs in.
-5. **Re-runs are safe.** A version already on the registry is skipped rather
-   than republished, so re-running a job that failed between the platform and
-   wrapper publishes finishes the release. Only npm's E404 counts as "not
-   published"; a lookup that fails any other way is retried and then stops the
-   job before anything is published.
-
-`zero update` keeps working unchanged: it detects an npm install by finding a
-`package.json` named `@twigpine/zero` next to the running binary — true inside
-a platform payload too — and updates via `npm install -g @twigpine/zero@latest`.
-
-## The move from `@gitlawb/zero`
-
-Zero was published as `@gitlawb/zero` up to 0.9.0 and as `@twigpine/zero`
-from 0.10.0. There is no in-place migration: both packages own the `zero`
-bin, so npm refuses to install one over the other (`EEXIST`), and forcing it
-lets a later uninstall of the old package delete the shared bin. The user
-has to uninstall the old package and install the new one, in that order.
-
-Deprecating the old package alone does not reach existing users. 0.9.0's
-`zero upgrade` runs `npm install -g @gitlawb/zero@latest`; with nothing newer
-under that name, npm reinstalls nothing, prints no deprecation warning (it
-only warns when it installs something), and Zero reports the update as done.
-So 0.10.0 is published once more under the old name, as a bridge:
-
-- The publish job assembles the same verified artifacts a second time with
-  `build-platform-packages.mjs --package-name @gitlawb/zero` and publishes
-  them with the same script, after the `@twigpine/zero` publish. A gate runs
-  it only while the old name's `latest` is still 0.9.0 (or is this version,
-  on a re-run), so it cannot happen twice.
-- The bridge build knows its name from the `package.json` beside it. The Go
-  binary reports it as `InstallMethodNpmLegacy`: `zero upgrade` refuses
-  with the switch steps instead of reinstalling it, and `zero update --check`
-  adds them. `bin/zero.js` prints the same steps after `zero` exits, on a
-  terminal only.
-- Updating from 0.9.0 now installs a real version, so npm also shows the
-  deprecation message.
-
-### Runbook
-
-Before the first release under the new name:
-
-1. Create the package, since npm only attaches a trusted publisher to a
-   package that exists: publish an empty `@twigpine/[email protected]` by hand with
-   `npm publish --access public --tag bootstrap`, then
-   `npm deprecate @twigpine/[email protected] "Placeholder; install @twigpine/zero@latest"`.
-2. Trust this workflow for it:
-   `npm trust github @twigpine/zero --repo Twigpine/zero --file release-artifacts.yml --env npm-publish --allow-publish`.
-3. Point the old package's trusted publisher at this repository too, for the
-   bridge publish: `npm trust list @gitlawb/zero`, revoke the existing entry
-   with `npm trust revoke @gitlawb/zero --id <id>`, then run the same
-   `npm trust github` command for `@gitlawb/zero`.
-4. Confirm Settings → Environments → `npm-publish` has a required reviewer.
-   The environment exists either way; without a reviewer the job does not
-   wait for approval.
-
-After the release, once both packages show 0.10.0 as `latest`:
-
-1. `npm deprecate @gitlawb/zero "Zero moved to @twigpine/zero. Switch with: npm uninstall -g @gitlawb/zero && npm install -g @twigpine/zero"`
-   (no version range, so every version, including the platform payloads,
-   carries it). Never unpublish: existing installs resolve their platform
-   payload through these versions.
-2. Revoke the old package's trusted publisher (`npm trust revoke`), so
-   nothing can publish under that name again.
-3. Delete the two `@gitlawb/zero` steps from `release-artifacts.yml`. The Go
-   and wrapper handling of the old name can stay; it only activates in a
-   build installed under that name.
-
-## Runbook: bumping the vendored helpers
-
-The vendored helper versions are pinned by the repo `package.json`
-`dependencies` + `package-lock.json`; the release build vendors exactly what
-the lockfile resolves. No `^range` surprises ship: a release carries what its
-lockfile pinned at build time.
-
-- Routine bump: `npm install agent-browser@<version>` (or `tuistory@…`) in the
-  repo to update pin + lockfile, verify the browser/terminal tools end-to-end,
-  ship with the next release.
-- Security response: if a vendored helper publishes a security fix, the bump
-  is release-worthy on its own — cut a patch release of zero carrying only the
-  pin change.
-- Attribution: agent-browser is Apache-2.0; its LICENSE ships inside the
-  vendored package directory (`helpers/node_modules/agent-browser/`), which
-  satisfies redistribution attribution.
-
-## History / rationale
-
-Until v0.3.x the npm package was a wrapper with a `postinstall` downloader and
-`agent-browser`/`tuistory` as regular dependencies. That produced three
-warnings on every install (`EBADENGINE` from agent-browser's `node >=24`
-engines pin, and `allow-scripts` warnings for both postinstall scripts), broke
-silently under Bun's default script blocking, and coupled `npm install` to
-GitHub Releases availability. The platform-package model removes the warnings
-structurally — there is nothing left in the tree for a package manager to warn
-about — rather than asking users to approve or suppress them.

docs/NPM_WRAPPER_SMOKE.md

@@ -1,9 +1,8 @@
 # npm Wrapper Smoke Checklist
 
 Run this checklist when a PR changes npm distribution files such as
-`package.json`, `bin/zero.js`, `scripts/npm/build-platform-packages.mjs`,
-`scripts/npm/publish-packages.sh`, Go build or release tooling, or the npm
-`bin` wrapper.
+`package.json`, `bin/zero.js`, Go build or release tooling, or the npm `bin`
+wrapper.
 
 ## Required Checks
 
@@ -22,52 +21,11 @@ go run ./cmd/zero-release build
 go run ./cmd/zero-release smoke
 ```
 
-## End-To-End Assembly Smoke
-
-Build a real archive for the host platform and assemble the npm payloads from
-it (this is exactly what the publish job does):
-
-```bash
-go run ./cmd/zero-release package
-node scripts/npm/build-platform-packages.mjs \
-  --artifacts-dir dist/release --out-dir dist/npm --only <platform>-<arch>
-```
-
-Then simulate an installed layout and run the wrapper through each resolution
-path:
-
-```bash
-# platform-package path
-mkdir -p /tmp/zero-sim/node_modules/@twigpine
-cp -R dist/npm/wrapper /tmp/zero-sim/node_modules/@twigpine/zero
-cp -R dist/npm/platforms/zero-<platform>-<arch> \
-  "/tmp/zero-sim/node_modules/@twigpine/zero-<platform>-<arch>"
-node /tmp/zero-sim/node_modules/@twigpine/zero/bin/zero.js --version
-
-# first-run download fallback (delete the platform package first)
-rm -rf "/tmp/zero-sim/node_modules/@twigpine/zero-<platform>-<arch>"
-node /tmp/zero-sim/node_modules/@twigpine/zero/bin/zero.js --version
-```
-
 ## Checklist
 
-- `package.json` has the expected package name (`@twigpine/zero`), version,
-  `bin.zero` entry, and NO `scripts` entries — the published package must be
-  free of lifecycle scripts (see NPM_PACKAGING.md).
-- `scripts/npm/build-platform-packages.mjs` emits platform payloads whose
-  `package.json` is `@twigpine/zero@<version>-<platform>-<arch>` with matching
-  `os`/`cpu`, contains the executable binary and the vendored `helpers/` tree
-  with regular-file (non-symlink) `.bin` shims, and a wrapper payload with no
-  scripts, no dependencies, and the full five-alias `optionalDependencies`
-  matrix.
-- `scripts/postinstall.mjs` (the first-run fallback) resolves the correct
-  release asset name/URL per platform (`ZERO_INSTALL_DRY_RUN=1` prints the
-  plan), verifies the downloaded archive's SHA-256, and extracts only the
-  known binary basenames into place. `ZERO_SKIP_DOWNLOAD=1` opts out cleanly
-  (exit 0) and an unsupported platform/arch is a non-fatal skip.
-- The wrapper prefers the platform package binary over a previously downloaded
-  one, and `agent-browser`/`tuistory` run from the platform package's
-  `helpers/node_modules/.bin` shims.
+- `package.json` has the expected package name, version, and `bin.zero` entry.
+- The wrapper binary resolves through the package `bin` entry and
+  `node_modules/.bin` in a package-install smoke test.
 - The built binary exits 0 for `zero --version` or `zero --help`.
 - `zero --version` reports `zero <package.json version>`.
 - Release packaging still emits the expected archive and checksum names when

docs/PERFORMANCE.md

@@ -1,6 +1,6 @@
 # Zero Performance Benchmarks
 
-The performance harness tracks three release-facing signals:
+The M2 performance harness tracks three release-facing signals:
 
 - Cold start: process startup time for `zero --version`.
 - Binary first output: time from spawning the built `zero --version` command to

docs/PRD.md

@@ -0,0 +1,602 @@
+# Zero — Product Requirements Document (v1.0)
+
+**Status:** DRAFT v1.0
+**Target:** Compete with Claude Code + Cursor + OpenCode
+**Timeline:** 6-12 months
+**Stack:** Go native core + npm distribution wrapper
+
+---
+
+## 1. Vision
+
+**Zero is a terminal-first, editor-aware, multi-provider AI coding platform.**
+
+It combines the best of:
+- **Claude Code** — terminal-native agentic coding
+- **Cursor** — IDE integration + smart editing
+- **OpenCode** — multi-provider + headless
+
+**One Go-native agent core. Three surfaces. Zero lock-in.**
+
+---
+
+## 2. Core Surfaces
+
+### 2.1 Terminal (TUI) — Primary
+- Interactive coding agent in terminal
+- Streaming, append-style (like Claude Code)
+- Bubble Tea + Lip Gloss-based
+- Full keyboard control
+- Mouse support
+
+### 2.2 Editor (VS Code Extension)
+- Same agent core, different UI
+- Inline suggestions + chat panel
+- File editing with diff view
+- Diagnostics integration
+- LSP-aware
+
+### 2.3 Headless (CLI/CI)
+- `zero exec "prompt"` for scripts
+- `zero serve` for daemon mode
+- JSON-RPC over stdio/WebSocket
+- MCP server support
+
+---
+
+## 3. Architecture
+
+```
+┌─────────────────────────────────────────────────┐
+│              ZERO PLATFORM                        │
+├─────────────────────────────────────────────────┤
+│                                                  │
+│  ┌──────────┐  ┌──────────┐  ┌──────────┐     │
+│  │   TUI    │  │   VSCode │  │ Headless │     │
+│  │ Surface  │  │ Surface  │  │ Surface  │     │
+│  └────┬─────┘  └────┬─────┘  └────┬─────┘     │
+│       │             │             │            │
+│       └─────────────┼─────────────┘            │
+│                     │                          │
+│              ┌──────▼──────┐                   │
+│              │  Agent Core │                   │
+│              │  (ReAct)    │                   │
+│              └──────┬──────┘                   │
+│                     │                          │
+│  ┌──────┬──────┬────┴────┬──────┬──────┐      │
+│  │Tools │Perms │Sessions │Provi │Memory│      │
+│  └──────┴──────┴─────────┴──────┴──────┘      │
+│                                                  │
+└─────────────────────────────────────────────────┘
+```
+
+**Layering Rules:**
+- Agent Core never imports a surface
+- Surfaces are thin shells (I/O + rendering)
+- All state persists to local files
+- No cloud dependency
+
+---
+
+## 4. Functional Requirements (24 Features)
+
+### F1 — Agent Core (P0)
+- ReAct loop: think → tool → result → think
+- Stream text + tool calls + thinking
+- Parallel tool execution where safe
+- Bound turns (max 100)
+- Clean interrupt (Esc/Ctrl-C)
+- Event stream: `text | tool_call | tool_result | thinking | usage | plan_update | error | turn_end`
+
+### F2 — Tools (P0)
+
+**Core (8):**
+- `read_file` — read with line ranges, images
+- `write_file` — create/overwrite
+- `edit_file` — exact-string edit (uniqueness guard)
+- `bash` — run shell command
+- `grep` — ripgrep content search
+- `glob` — file pattern matching
+- `apply_patch` — multi-hunk patches
+- `update_plan` — todo list
+
+**Advanced (4):**
+- `web_fetch` / `web_search` — web access
+- `task` — spawn subagent
+- `structured_output` — JSON-Schema validated
+- `notebook_edit` — Jupyter notebooks
+
+**Tool Requirements:**
+- Go typed parameter schemas -> JSON Schema
+- Side-effect class: `read | write | shell | network | out_of_workspace`
+- Structured results: `{ status, output, truncated?, meta? }`
+- Atomic execution
+- Permission gating
+
+### F3 — Providers & Model Registry (P0)
+- OpenAI-compatible (works with OpenAI, OpenRouter, Ollama, etc.)
+- Anthropic (Claude)
+- Google Gemini
+- Azure OpenAI
+- AWS Bedrock
+- xAI (Grok)
+
+**Model Registry:**
+
+```go
+type ModelEntry struct {
+  ID              string
+  Name            string
+  Provider        string
+  APIProviders    []string
+  ContextLimits   ContextLimits
+  ReasoningEffort ReasoningEffort
+  Capabilities    ModelCapabilities
+  Cost            ModelCost
+  Tier            string
+  MatchPatterns   []string
+}
+```
+
+- Per-task model selection (`-m`)
+- Provider rotation/failover
+- Cost tracking
+- "Spec model" for planning
+- Fallback model on failure
+
+### F4 — Terminal UI (P0)
+- **Layout:** header (cwd · git · model) → tool rows → diff → response → input → footer
+- **Streaming:** append-only transcript model with live tail updates
+- **Markdown:** full CommonMark + syntax highlighting
+- **Tool rows:** collapsible with one-line summaries
+- **Input:** `/` commands, `@` files, `!` bash, `Esc` interrupt
+- **Robustness:** resize, wide-char, ANSI, non-TTY fallback
+- **Splash:** ZERO wordmark
+- **Themes:** light/dark + custom
+
+### F5 — Sessions (P0)
+- Persist to `~/.local/share/zero/sessions/<id>/`
+- `meta.json` + `events.jsonl` + `messages.jsonl` + `checkpoints/`
+- `--resume [id]` (default: latest)
+- `--fork <id>` (copy with lineage)
+- Search: `zero search <query>` over messages/tools/results
+- Atomic writes (write-temp-then-rename)
+- Schema versioning
+- Export to Markdown/JSON
+
+### F6 — Configuration (P0)
+- Layered: defaults → user → project → env → CLI
+- `~/.config/zero/config.json` (user)
+- `./.zero/config.json` (project)
+- Runtime overlay (`--settings <path>`)
+- Feature flags for staged rollout
+- Validation on load
+
+### F7 — MCP (Model Context Protocol) (P0)
+- Connect to stdio/HTTP/SSE servers
+- Surface MCP tools into registry
+- `zero mcp add/remove/list`
+- Per-server and per-tool permissions
+- Persistent grants with revoke/clear
+- MCP server mode (zero as MCP server)
+
+### F8 — Headless / Programmatic (P0)
+- `zero exec [prompt]` — one-shot
+- `zero serve` — daemon mode
+- `--input-format stream-json` — line-delimited events
+- `--input-format stream-jsonrpc` — JSON-RPC protocol
+- `-o text|json` output formats
+- Exit codes: `0=success, 1=crash, 2=usage, 3=provider, 4=tool, 5=permission, 6=budget`
+
+### F9 — Permissions & Autonomy (P0)
+- **Side-effect classes:** read, write, shell, network, out_of_workspace
+- **Autonomy levels:** low (ask), medium (smart), high (auto)
+- `--skip-permissions-unsafe` (loud warning)
+- TUI: inline prompts (allow/deny/always)
+- Headless: default-deny unless granted
+- Persistent grants with list/revoke/clear
+- Audit log in `events.jsonl`
+
+**Permission Matrix:**
+
+| Tool Class | low | medium | high |
+|------------|-----|--------|------|
+| Read | allow | allow | allow |
+| Workspace write | prompt | allow | allow |
+| Shell | prompt | prompt | allow |
+| Network | prompt | allow | allow |
+| Out-of-workspace | deny | prompt | prompt |
+
+### F10 — Observability (P0)
+- Structured logging (stdout/stderr split)
+- Secret redaction (API keys, tokens, passwords)
+- No vendor telemetry (local only)
+- `zero doctor` — health check command
+- Crash reports (opt-in, local)
+- Performance metrics (TTFT, tokens/sec)
+
+### F11 — Subagents (P1)
+- `task` tool spawns scoped subagent
+- Built-in agents: code-review, security-review, refactor, test-gen
+- Recursion depth limit
+- Parent session linkage
+- Shared/isolated budgets
+
+### F12 — Plugins (P1)
+- User/project-scoped plugins
+- Commands, tools, prompts, hooks
+- Plugin manifest: `plugin.json`
+- `zero plugin install <path|url>`
+- No marketplace in v1 (manual install)
+
+### F13 — Distribution (P0)
+- **Single binary** via Go cross-compilation
+- npm package as a thin installer/launcher for the platform binary
+- Cross-platform: Linux, macOS, Windows
+- `zero update [--check]` self-update
+- Checksum verification
+- Rollback on failure
+
+### F14 — VS Code Extension (P1)
+- Same agent core via stream protocol
+- Inline chat panel
+- Diff view in editor
+- Diagnostics integration
+- LSP awareness
+- File watching
+
+### F15 — Memory & Context (P1)
+- `AGENTS.md` hierarchical memory
+- `@import` for modular rules
+- Auto-generated from `init` command
+- Project conventions learning
+- Skills system (reusable instruction packs)
+- Context budgeting (token tracking)
+- Auto-compaction when full
+
+### F16 — Hooks System (P1)
+- Lifecycle hooks: `PreToolUse`, `PostToolUse`, `SessionStart`, `SessionEnd`
+- User-defined shell commands
+- JSON output for conditional flow
+- `.zero/hooks/` directory
+
+### F17 — Slash Commands (P0)
+
+**Built-in (20):**
+- Session: `/clear`, `/compact`, `/context`, `/rewind`, `/resume`, `/exit`
+- Model: `/model`, `/effort`, `/style`, `/permissions`
+- Project: `/init`, `/memory`, `/skills`
+- Extensibility: `/mcp`, `/hooks`, `/agents`
+- Meta: `/help`, `/config`, `/doctor`, `/feedback`
+
+**Custom:** `./.zero/commands/*.md`
+
+### F18 — Git Integration (P1)
+- Worktree isolation per task
+- Auto-commit with messages
+- Branch management
+- PR creation
+- Diff review
+- Conflict resolution
+
+### F19 — Testing & Verification (P1)
+- `run_tests` tool
+- Self-verification loop
+- Test runner integration
+- Coverage reporting
+- Diagnostics (typecheck, lint)
+- LSP integration
+
+### F20 — Web Access (P1)
+- `web_fetch` — fetch URL content
+- `web_search` — search engine
+- Provider/permission gated
+- Rate limiting
+- Caching
+
+### F21 — Sandbox (P2)
+- Linux: bubblewrap
+- macOS: sandbox-exec
+- Windows: AppContainer
+- Filesystem policies
+- Network policies
+- Unix socket controls
+
+### F22 — Multi-modal (P2)
+- Image input (screenshots, diagrams)
+- PDF parsing
+- Voice input (optional)
+- File attachments
+- Paste support
+
+### F23 — Telemetry (P2)
+- Local-only metrics
+- Token usage tracking
+- Cost reports
+- Performance profiling
+- Crash reports (opt-in)
+- NO vendor telemetry
+
+### F24 — Advanced Features (P2)
+- Code review automation
+- Auto-refactor
+- Dependency updates
+- Security scanning
+- Documentation generation
+
+---
+
+## 5. Data Models
+
+### 5.1 Headless Event Stream
+
+```json
+{ "type": "run_start", "runId": "r1", "sessionId": "s1", "cwd": "/repo", "model": "..." }
+{ "type": "text", "delta": "..." }
+{ "type": "tool_call", "id": "t1", "name": "bash", "args": {...}, "sideEffect": "shell" }
+{ "type": "permission", "id": "t1", "decision": "needs_approval", "reason": "shell" }
+{ "type": "tool_result", "id": "t1", "status": "ok", "output": "...", "truncated": false }
+{ "type": "usage", "promptTokens": 1234, "completionTokens": 567, "costUsd": 0.012 }
+{ "type": "plan_update", "plan": [{ "id": "1", "content": "...", "status": "in_progress" }] }
+{ "type": "turn_end", "stopReason": "end_turn" }
+{ "type": "error", "code": "rate_limit", "message": "...", "recoverable": true }
+{ "type": "run_end", "status": "success", "exitCode": 0 }
+```
+
+### 5.2 Session On Disk
+
+```
+~/.local/share/zero/sessions/<id>/
+  meta.json        # { schemaVersion, id, parentId?, title, cwd, model, createdAt, updatedAt, tokens, cost }
+  events.jsonl     # append-only AgentEvent stream
+  messages.jsonl   # provider-facing messages
+  checkpoints/     # snapshots for restore/fork/compact
+```
+
+### 5.3 Tool Contract
+
+```go
+type Tool interface {
+  Name() string
+  Description() string
+  Parameters() JSONSchema
+  SideEffect() SideEffect
+  Execute(ctx ToolContext, args map[string]any) ToolResult
+}
+
+type ToolResult struct {
+  Status    string
+  Output    string
+  Truncated bool
+  Meta      map[string]any
+}
+```
+
+### 5.4 Config Schema
+
+```json
+{
+  "model": "claude-sonnet-4-6",
+  "providers": {
+    "anthropic": { "apiKey": "env:AN..._KEY" },
+    "openai": { "apiKey": "env:OP..._KEY" }
+  },
+  "permissions": {
+    "autonomy": "medium",
+    "grants": [{ "tool": "bash", "pattern": "git status", "decision": "allow" }]
+  },
+  "ui": { "theme": "dark", "syntaxHighlighting": true }
+}
+```
+
+---
+
+## 6. Non-Functional Requirements
+
+### Performance
+- TTFT < 500ms after provider's first byte
+- No full-transcript repaint per token
+- Cold start < 300ms (warm cache)
+- Tool execution < 100ms overhead
+- Session resume < 1s
+
+### Reliability
+- Crash-free TUI under resize, wide-char, non-TTY
+- Clean interrupt (no half-written state)
+- Atomic session writes
+- Recovery from malformed JSONL
+- Provider failover
+
+### Security
+- No mutation without permission decision (hard invariant)
+- API keys never logged
+- Secret redaction everywhere
+- Headless stdout free of logs
+- Workspace boundary by default
+- Sandboxing for untrusted code
+
+### Portability
+- Linux, macOS, Windows
+- Any OpenAI-compatible endpoint
+- x86_64, ARM64
+- Single binary distribution
+
+### Testability
+- Mock provider for unit tests
+- Fake MCP server/client
+- Fake terminal/PTY
+- Sandbox simulator
+- Deterministic event replay
+
+---
+
+## 7. Milestones
+
+### M0 — Foundation (Weeks 1-2)
+- Go module setup
+- Agent core skeleton
+- 8 core tools (read, write, edit, bash, grep, glob, apply_patch, update_plan)
+- OpenAI-compatible provider
+- Basic Bubble Tea TUI
+- Permission gate (read vs mutate)
+- Session persistence
+
+**Exit:** `zero` runs, can read/edit files, basic chat works.
+
+### M1 — Multi-Provider (Weeks 3-4)
+- Anthropic provider
+- Gemini provider
+- Model registry
+- Per-task model selection
+- Provider rotation
+- Cost tracking
+- Headless `exec` mode
+
+**Exit:** Switch between Claude/GPT/Gemini, see cost, run headless.
+
+### M2 — Polish (Weeks 5-8)
+- Advanced TUI features
+- Full markdown + syntax highlighting
+- Tool result truncation/pagination
+- Auto-compaction
+- Context budgeting
+- 20 slash commands
+- Doctor command
+- Search command
+
+**Exit:** Production-ready TUI, smooth streaming, all commands work.
+
+### M3 — Distribution (Weeks 9-10)
+- Single binary build
+- Self-update
+- Cross-platform CI
+- VS Code extension MVP
+- Documentation site
+
+**Exit:** `zero` ships as one binary, works on Win/Mac/Linux.
+
+### M4 — Extensibility (Weeks 11-14)
+- MCP client + permissions
+- Hooks system
+- Skills system
+- Memory (AGENTS.md)
+- Plugin loading
+- Subagents (built-in: review, security)
+
+**Exit:** Plugins work, MCP servers connect, memory persists.
+
+### M5 — Advanced (Weeks 15-20)
+- Web fetch/search
+- Git worktrees
+- Self-verification
+- Diagnostics (LSP, typecheck)
+- Testing integration
+- Code review automation
+
+**Exit:** Zero can review code, run tests, manage git.
+
+### M6 — Sandbox & Security (Weeks 21-24)
+- Linux sandbox (bubblewrap)
+- macOS sandbox
+- Windows AppContainer
+- Network policies
+- Filesystem policies
+
+**Exit:** Untrusted code runs safely in sandbox.
+
+### Beyond v1.0
+- Multi-modal (images, PDFs)
+- Voice input
+- Cloud sync (optional)
+- Team features
+- Marketplace (if demand)
+
+---
+
+## 8. Risks & Mitigations
+
+| # | Risk | Mitigation |
+|---|------|------------|
+| R1 | Scope creep | Stick to milestones, defer features |
+| R2 | Provider API changes | Abstract via interface, test with mocks |
+| R3 | TUI complexity | Use Bubble Tea/Lip Gloss, follow mature terminal agent UX patterns |
+| R4 | Performance | Benchmark early, optimize streaming |
+| R5 | Security vulnerabilities | Permission gate from day 1, security review |
+| R6 | Cross-platform bugs | CI on Win/Mac/Linux from M0 |
+| R7 | Breaking changes | Schema versioning, migration tools |
+
+---
+
+## 9. Success Metrics
+
+### v1.0 (6 months)
+- 5+ providers supported
+- 12+ tools
+- 100% test coverage on core
+- < 300ms cold start
+- Single binary < 50MB
+- Works on Win/Mac/Linux
+- 1000+ GitHub stars
+- 50+ contributors
+
+### v2.0 (12 months)
+- VS Code extension published
+- MCP server mode
+- Plugin ecosystem (20+ plugins)
+- 10K+ active users
+- Compete with Claude Code on benchmarks
+
+---
+
+## 10. Out of Scope (v1.0)
+
+- Cloud sync / hosted backend
+- Relay / remote SSH execution
+- Multi-agent mission mode
+- Plugin marketplace
+- Auto-generated wikis
+- Git authorship notes
+- Vendor telemetry
+- Voice input
+- Mobile support
+
+---
+
+## 11. Open Decisions
+
+1. **TUI library:** Bubble Tea + Lip Gloss — **Decide: Go-native TUI** (single-binary friendly, mature terminal ecosystem)
+2. **Storage:** JSONL files vs SQLite — **Decide: JSONL** (inspectable, simple)
+3. **Package structure:** Single vs monorepo — **Decide: Single** until M4
+4. **Provider abstraction:** Direct API vs wrapper — **Decide: Direct** (portability)
+5. **Patch strategy:** apply_patch vs edit_file — **Decide: Both** (apply_patch for bulk, edit_file for small)
+
+---
+
+## 12. Team & Timeline
+
+**Team (3 people):**
+- You (lead + TUI + tools)
+- Backend dev (providers + core)
+- Designer (VS Code extension + docs)
+
+**Timeline:**
+- M0-M1: 4 weeks (foundation)
+- M2-M3: 6 weeks (polish + distribution)
+- M4-M5: 8 weeks (extensibility)
+- M6: 4 weeks (sandbox)
+- **Total v1.0: 6 months**
+
+---
+
+## 13. Why This Will Work
+
+1. **Proven patterns** — Based on clean-room analysis of existing terminal coding-agent UX patterns
+2. **Multi-provider** — Unique advantage vs Claude Code/Cursor
+3. **Open source** — Community contributions
+4. **Go** — Native binary, fast startup, strong concurrency, cross-platform CLI ergonomics
+5. **npm distribution wrapper** — Keeps JavaScript ecosystem installation while the runtime stays native
+6. **Clear milestones** — Ship early, iterate
+
+---
+
+**This is the real PRD. 13 sections, 24 features, 6 months to v1.0.**

docs/README.md

@@ -1,25 +0,0 @@
-# Zero Documentation
-
-This directory contains public documentation for using, extending, and releasing
-Zero.
-
-## User Docs
-
-- [Install](INSTALL.md)
-- [Local per-model completion limits](MODEL_RPM.md)
-- [Update flow](UPDATE.md)
-- [OAuth logins and subscription-backed providers](oauth-subscriptions.md)
-
-## Automation And Integrations
-
-- [Stream-JSON protocol](STREAM_JSON_PROTOCOL.md)
-- [GitHub Action](GITHUB_ACTION.md)
-- [Specialists](SPECIALISTS.md)
-
-## Maintainer Docs
-
-- [How Zero Works](HOW_ZERO_WORKS.md)
-- [npm wrapper smoke checklist](NPM_WRAPPER_SMOKE.md)
-- [Benchmarks](BENCHMARK.md)
-- [Performance benchmarks](PERFORMANCE.md)
-- [Offline agent evals](AGENT_EVALS.md)

docs/SPECIALISTS.md

@@ -1,182 +0,0 @@
-# Zero Specialists
-
-Specialists are named sub-agents that Zero can delegate focused work to through
-the `Task` tool. A specialist is a markdown manifest with YAML-style
-frontmatter plus a system prompt body.
-
-Specialists can be built in, user-scoped, or project-scoped:
-
-| Scope | Path | Notes |
-| --- | --- | --- |
-| Built-in | compiled into Zero | `worker`, `explorer`, and `code-review` ship with the binary. |
-| User | `~/.config/zero/specialists/*.md` | Available across local workspaces. |
-| Project | `.zero/specialists/*.md` | Shared with the current repository when committed. |
-
-Project specialists override user and built-in specialists with the same name.
-User specialists override built-ins.
-
-## CLI Management
-
-```bash
-zero specialist list
-zero specialist show worker
-zero specialist path
-
-zero specialist create api-review \
-  --project \
-  --description "Reviews API changes" \
-  --tools read-only,plan \
-  --prompt "Review API changes for compatibility and missing tests."
-
-zero specialist edit api-review --project
-zero specialist delete api-review --project
-```
-
-Use `--json` with `list`, `show`, `path`, `create`, or `delete` when scripting.
-`create --force` replaces an existing manifest, but refuses symlink overwrites.
-`edit` also refuses symlink manifests before opening `$VISUAL` or `$EDITOR`.
-
-## Manifest Format
-
-```markdown
----
-name: api-review
-description: Reviews API changes for compatibility and missing tests.
-tools:
-  - read-only
-  - plan
----
-
-Review API changes for behavior regressions, compatibility breaks, and missing
-tests. Report concrete findings with file paths.
-```
-
-Supported frontmatter keys:
-
-| Key | Purpose |
-| --- | --- |
-| `name` | Lowercase specialist id. Use letters, numbers, and dashes. |
-| `description` | Short summary shown in listings and task metadata. |
-| `extends` | Optional base specialist to inherit prompt/model/tools from. |
-| `model` | Optional model override. Empty means inherit the parent model. |
-| `reasoningEffort` | Optional reasoning effort override. |
-| `tools` | Array of tool categories or tool ids. |
-
-If the body is empty and `description` is set, Zero uses the description as the
-system prompt and reports a warning in `zero specialist show`.
-
-## Tool Selection
-
-Known categories:
-
-| Category | Tools |
-| --- | --- |
-| `read-only` | `read_file`, `list_directory`, `grep`, `glob` |
-| `edit` | read-only tools plus `write_file`, `edit_file`, `apply_patch` |
-| `execute` | read-only tools plus `bash` |
-| `plan` | `update_plan` |
-
-Specialist manifests cannot enable `Task`, `TaskOutput`, `TaskStop`, or
-`GenerateSpecialist`, so child specialists cannot spawn more specialists or
-author new ones.
-
-## Agent Tools
-
-Zero registers these tools for top-level agent runs:
-
-| Tool | Purpose |
-| --- | --- |
-| `Task` | Launch a specialist sub-agent for a focused prompt. |
-| `TaskOutput` | Read or block on a background specialist task's output. |
-| `TaskStop` | Stop a running background specialist task. |
-| `GenerateSpecialist` | Create a project-local specialist manifest from a description. |
-
-`GenerateSpecialist` is project-scoped only. It writes to
-`.zero/specialists`, not the user specialist directory.
-
-Example LLM-facing `Task` payload:
-
-```json
-{
-  "name": "explorer",
-  "description": "Find session storage code",
-  "prompt": "Find the files that create, load, and list sessions."
-}
-```
-
-Background task payload:
-
-```json
-{
-  "name": "worker",
-  "description": "Audit release docs",
-  "prompt": "Check the release docs for stale TypeScript references.",
-  "run_in_background": true
-}
-```
-
-The returned `task_id` is also the child session id. Use it with
-`TaskOutput`, `TaskStop`, or `Task` resume.
-
-## Background State
-
-Background specialist output is stored under:
-
-```text
-${XDG_DATA_HOME:-~/.local/share}/zero/background/
-```
-
-Each task has:
-
-- `<task_id>.ndjson` for the child process stream output
-- `<task_id>.json` for task metadata such as status, PID, parent session, and
-  timestamps
-
-Persisted metadata lets a new background manager instance read completed task
-output or stop a still-running task by id.
-
-If Zero is restarted while a background task is still marked `running`, the new
-manager marks that task `error` and clears its PID. This avoids sending
-`TaskStop` to a stale PID that may now belong to an unrelated process.
-
-## Recovering an Interrupted Overwrite
-
-Zero writes and flushes a complete temporary file before publishing an overwrite,
-so a write failure before publication leaves the existing manifest unchanged
-instead of truncating it. On Unix, publication uses a same-directory rename and
-preserves the existing file's permission bits.
-
-On Windows, Zero uses `ReplaceFileW` to preserve the destination DACL instead of
-silently replacing it with the temporary file's inherited DACL. `ReplaceFileW`
-is not observer-atomic: another process can briefly observe the destination path
-as absent during replacement. Zero serializes specialist loads and managed
-mutations within one process, but cannot synchronize external processes or
-editors.
-
-Windows errors 1176 (`ERROR_UNABLE_TO_MOVE_REPLACEMENT`) and 1177
-(`ERROR_UNABLE_TO_MOVE_REPLACEMENT_2`) are partial replacement failures. With
-Zero's managed backup, 1176 leaves the original names intact and needs no manual
-recovery. For 1177, Zero has moved the original aside and tries to move it back.
-That rollback almost always succeeds, and the failed write changes nothing.
-
-If the rollback itself fails — typically because another process is holding a
-lock on the file — the original is not lost, but it is left under a name Zero
-does not read:
-
-```text
-<specialist dir>/.zero-replace-<random>.backup
-```
-
-Only `*.md` files are loaded as specialists, so until that file is renamed the
-specialist will not appear in `zero specialist list` or resolve by name. Zero's
-error message includes both the backup path and destination path. Recover by
-closing whatever holds the lock and renaming the backup back:
-
-```powershell
-Move-Item .zero-replace-<random>.backup <name>.md
-```
-
-A `.zero-replace-*.backup` can also linger after a *successful* overwrite if the
-backup could not be deleted afterward. That case is reported as a warning rather
-than an error — the new manifest is already in place, and the leftover file is
-safe to delete.

docs/STREAM_JSON_PROTOCOL.md

@@ -8,12 +8,12 @@ redacted before they are written to stdout.
 
 ## Version
 
-Current schema version: `2`
+Current schema version: `1`
 
 Every input and output event must include:
 
 ```json
-{ "schemaVersion": 2, "type": "..." }
+{ "schemaVersion": 1, "type": "..." }
 ```
 
 Output events also include `runId`.
@@ -24,42 +24,27 @@ Output events also include `runId`.
 `--file`.
 
 ```json
-{ "schemaVersion": 2, "type": "message", "role": "user", "content": "Inspect this repo." }
-{ "schemaVersion": 2, "type": "prompt", "content": "Return only blockers." }
+{ "schemaVersion": 1, "type": "message", "role": "user", "content": "Inspect this repo." }
+{ "schemaVersion": 1, "type": "prompt", "content": "Return only blockers." }
 ```
 
 Zero combines accepted input event content in order, separated by blank lines.
 Unknown fields are rejected so protocol clients catch drift early.
 
-Schema version `2` renamed sandbox permission metadata from `violation` to
-`block`. Clients should read the optional `block` object on permission and tool
-events when present.
-
 ## Output Events
 
 `zero exec --output-format stream-json` emits schema-versioned JSONL events.
 
 ```json
-{ "schemaVersion": 2, "type": "run_start", "runId": "run_20260603_abc123", "sessionId": "zero_20260603100000_abc123", "cwd": "/repo", "provider": "openai", "model": "gpt-4.1", "apiModel": "gpt-4.1" }
-{ "schemaVersion": 2, "type": "reasoning", "runId": "run_20260603_abc123", "delta": "Thinking..." }
-{ "schemaVersion": 2, "type": "text", "runId": "run_20260603_abc123", "delta": "..." }
-{ "schemaVersion": 2, "type": "tool_call", "runId": "run_20260603_abc123", "id": "call_1", "name": "read_file", "args": { "path": "README.md" }, "sideEffect": "read" }
-{ "schemaVersion": 2, "type": "permission_request", "runId": "run_20260603_abc123", "id": "call_2", "name": "write_file", "action": "prompt", "permission": "prompt", "permissionMode": "ask", "sideEffect": "write", "reason": "Creates or overwrites files." }
-{ "schemaVersion": 2, "type": "permission_decision", "runId": "run_20260603_abc123", "id": "call_2", "name": "write_file", "action": "allow", "permission": "prompt", "permissionGranted": true, "decisionReason": "approved in TUI" }
-{ "schemaVersion": 2, "type": "tool_result", "runId": "run_20260603_abc123", "id": "call_1", "status": "ok", "output": "...", "truncated": false }
-{ "schemaVersion": 2, "type": "usage", "runId": "run_20260603_abc123", "promptTokens": 12, "completionTokens": 8, "totalTokens": 20 }
-{ "schemaVersion": 2, "type": "final", "runId": "run_20260603_abc123", "text": "..." }
-{ "schemaVersion": 2, "type": "run_end", "runId": "run_20260603_abc123", "status": "success", "exitCode": 0 }
-```
-
-`reasoning` events carry live model reasoning/status deltas for providers that
-stream them separately from answer text. They are liveness/progress events only:
-they are not folded into `text` or the final answer.
-
-Permission events may include structured sandbox metadata:
-
-```json
-{ "schemaVersion": 2, "type": "permission_request", "runId": "run_20260603_abc123", "id": "call_3", "name": "bash", "action": "prompt", "permission": "prompt", "permissionMode": "ask", "sideEffect": "shell", "reason": "network access requires approval", "risk": { "level": "critical", "categories": ["network"] }, "block": { "code": "network", "toolName": "bash", "action": "prompt", "risk": { "level": "critical", "categories": ["network"] }, "reason": "network access requires approval", "recoverable": true } }
+{ "schemaVersion": 1, "type": "run_start", "runId": "run_20260603_abc123", "sessionId": "zero_20260603100000_abc123", "cwd": "/repo", "provider": "openai", "model": "gpt-4.1", "apiModel": "gpt-4.1" }
+{ "schemaVersion": 1, "type": "text", "runId": "run_20260603_abc123", "delta": "..." }
+{ "schemaVersion": 1, "type": "tool_call", "runId": "run_20260603_abc123", "id": "call_1", "name": "read_file", "args": { "path": "README.md" }, "sideEffect": "read" }
+{ "schemaVersion": 1, "type": "permission_request", "runId": "run_20260603_abc123", "id": "call_2", "name": "write_file", "action": "prompt", "permission": "prompt", "permissionMode": "ask", "sideEffect": "write", "reason": "Creates or overwrites files." }
+{ "schemaVersion": 1, "type": "permission_decision", "runId": "run_20260603_abc123", "id": "call_2", "name": "write_file", "action": "allow", "permission": "prompt", "permissionGranted": true, "decisionReason": "approved in TUI" }
+{ "schemaVersion": 1, "type": "tool_result", "runId": "run_20260603_abc123", "id": "call_1", "status": "ok", "output": "...", "truncated": false }
+{ "schemaVersion": 1, "type": "usage", "runId": "run_20260603_abc123", "promptTokens": 12, "completionTokens": 8, "totalTokens": 20 }
+{ "schemaVersion": 1, "type": "final", "runId": "run_20260603_abc123", "text": "..." }
+{ "schemaVersion": 1, "type": "run_end", "runId": "run_20260603_abc123", "status": "success", "exitCode": 0 }
 ```
 
 Errors are part of the protocol and are followed by `run_end`.
@@ -70,6 +55,6 @@ is not pre-approved, Zero may emit `permission_request` followed by a denied
 allows, denies, or always-allows the request.
 
 ```json
-{ "schemaVersion": 2, "type": "error", "runId": "run_20260603_abc123", "code": "provider_error", "message": "...", "recoverable": false }
-{ "schemaVersion": 2, "type": "run_end", "runId": "run_20260603_abc123", "status": "error", "exitCode": 3 }
+{ "schemaVersion": 1, "type": "error", "runId": "run_20260603_abc123", "code": "provider_error", "message": "...", "recoverable": false }
+{ "schemaVersion": 1, "type": "run_end", "runId": "run_20260603_abc123", "status": "error", "exitCode": 3 }
 ```

docs/THEMES.md

@@ -1,39 +0,0 @@
-# TUI Themes
-
-Zero's TUI ships a set of built-in color themes. Pick one with `--theme <name>`,
-the `ZERO_THEME` environment variable, or the `/theme <name>` command while
-running. `auto` (the default) follows the terminal's detected background.
-
-Run `/theme` with no argument to open a picker: move through the list to
-live-preview each theme, press Enter to apply the highlighted one, or Esc to
-cancel and restore the previously active theme. Run `/theme list` to print
-the active theme and the registered names without opening the picker.
-
-## Dune (`dune`)
-
-A warm sand-and-cream palette: sand/cream surface, charcoal ink, and a soft
-amber accent.
-
-## Neon (`neon`)
-
-A neon-on-black palette: pitch-black surface, bright green ink, and a cyan accent.
-
-## Adding a theme
-
-Every theme is a `palette` (a table of color hex tokens) plus one entry in
-`themeRegistry`, both in `internal/tui/theme_palettes.go`. `buildTheme` in
-`internal/tui/theme.go` turns a `palette` into the resolved `lipgloss.Style`
-set every renderer reads from the active `zeroTheme`. Adding a theme means
-adding a new `palette{...}` literal, a `themeRegistry` entry, and test
-coverage for the new palette (see below).
-
-Registry-wide tests in `internal/tui/theme_select_test.go` assert the basic
-WCAG AA text tokens, the gray-ramp order, the diff word-span pairs, and the
-selected-row band for every entry. The rendered-surface invariants beyond
-those (permission surfaces, selected-row secondary text, diff gutters, and
-the xterm-256 downsampling checks) are asserted per palette, not against the
-whole registry: `TestExtendedThemeContrastInvariants` and
-`TestExtendedThemeANSI256Contrast` enumerate the palettes they cover. A new
-theme must be added to those tests (or given equivalent palette-specific
-assertions), or CI can stay green while its permission, selected-row, and
-diff surfaces ship unreadable.

docs/UPDATE.md

@@ -1,126 +1,38 @@
-# Update Flow
+# Zero Update Flow
 
-`zero update --check` checks the latest GitHub release and compares it with the
-local CLI version. `zero update --apply` (or its shorthand, `zero upgrade`)
-downloads, verifies, and installs it.
+`zero update --check` checks the latest GitHub release for `Gitlawb/zero` and compares it with the local CLI version.
 
 ```bash
 zero update --check
 zero update --check --json
-zero update --check --repo Twigpine/zero
+zero update --check --repo Gitlawb/zero
+zero update --check --endpoint https://api.github.com/repos/Gitlawb/zero/releases/latest
+zero update --check --timeout 3s
 zero update --check --target windows-x64
-
-zero upgrade
-zero update --apply
 ```
 
-`--check` and `--apply` are mutually exclusive. `zero update` requires one of
-them explicitly; `zero upgrade` is `zero update` with `--apply` implied.
-
-`--check` is check-only:
+For M2 this command is intentionally check-only:
 
 - It does not replace the running binary.
-- It exits with code `0` when the check succeeds, even when an update is
-  available.
+- It exits with code `0` when the check succeeds, even when an update is available.
 - It exits with code `1` when the release check cannot be completed.
-- `--json` prints the same result in a machine-readable format for scripts and
-  CI.
+- `--json` prints the same result in a machine-readable format for scripts and CI.
+- `--repo <owner/repo>` checks a different GitHub repository when no endpoint is provided.
+- `--endpoint <url|owner/repo>` checks a specific release API URL or repository slug.
+- `--timeout <duration>` overrides the default release check timeout.
+- `--target <platform-arch>` validates release metadata for another supported target from the current machine.
+- Release checks time out after 5 seconds by default.
+- It validates that the latest release includes the expected archive and matching `.sha256` asset for the selected platform target.
 
-`--apply` installs the update in place:
+Supported targets are `linux-x64`, `linux-arm64`, `macos-x64`, `macos-arm64`, `windows-x64`, and `windows-arm64`. Without `--target`, Zero checks the current platform.
 
-- npm installs delegate to `npm install -g @twigpine/zero@latest`. An install
-  of the old `@gitlawb/zero` package refuses, without a release check, and
-  prints the steps to switch to `@twigpine/zero` (see
-  [INSTALL.md](INSTALL.md#moving-from-gitlawbzero)); `--check` prints them
-  too.
-- Standalone installs download the release archive, verify its checksum,
-  extract it, and atomically replace the running binary plus any installed
-  optional sandbox helpers.
-- On Windows, the running executable is renamed aside and cleaned up on the
-  next `zero update --apply` or `zero upgrade`, since it can't be overwritten
-  while running.
-- `--target` cannot be combined with `--apply`; it only applies to `--check`,
-  since applying always installs onto the current machine.
-- `--repo` and `--endpoint` are ignored when applying to an npm-managed
-  install: that path delegates to `npm install -g @twigpine/zero@latest` and
-  takes its release from the npm registry, not from GitHub. They still apply to
-  `--check` there.
-- `--json` serializes Zero's final result. For npm-managed installs, npm may
-  also write progress output to stdout, so neither
-  `zero update --apply --json` nor `zero upgrade --json` is guaranteed to
-  produce a single parseable JSON document. Use `--check --json` for
-  machine-readable automation.
+The release endpoint resolves in this order:
 
-Useful flags:
+- `--endpoint` from the CLI, or `Options.Endpoint` when calling `update.Check` from code.
+- `ZERO_UPDATE_RELEASE_URL` from the environment.
+- `--repo` from the CLI, or `Options.Repository` when calling `update.Check` from code.
+- `https://api.github.com/repos/Gitlawb/zero/releases/latest`.
 
-| Flag | Purpose |
-|---|---|
-| `--repo <owner/repo>` | Use another GitHub repository for `--check` and `--apply`/`upgrade`. Ignored by an npm-managed apply. |
-| `--endpoint <url\|owner/repo>` | Use a specific release API URL or repository slug for `--check` and `--apply`/`upgrade`. Ignored by an npm-managed apply. |
-| `--timeout <duration>` | Override the default release check timeout. |
-| `--target <platform-arch>` | Validate release metadata for another supported target (`--check` only). |
+`--endpoint`, `Options.Endpoint`, and `ZERO_UPDATE_RELEASE_URL` may be a full URL or an `owner/repo` slug.
 
-Supported targets are `linux-x64`, `linux-arm64`, `macos-x64`, `macos-arm64`,
-`windows-x64`, and `windows-arm64`. Without `--target`, Zero checks the current
-platform.
-
-Endpoint resolution order:
-
-1. `--endpoint`
-2. `ZERO_UPDATE_RELEASE_URL`
-3. `--repo`
-4. `https://api.github.com/repos/Twigpine/zero/releases/latest`
-
-Installer scripts download the matching release asset for the local platform and
-verify its `.sha256` file. If Zero is already installed, run `zero upgrade`
-instead of reinstalling.
-
-## Windows recovery state (standalone installs)
-
-This section describes Windows only. On Linux and macOS a standalone update
-renames the staged file directly over the executable path through the
-installation directory's file descriptor, so the replacement is atomic and no
-aside copy, marker, or recovery record is ever created — a failed update leaves
-the previous binary in place and nothing to resolve.
-
-On Windows, a running executable cannot be replaced in place, so the previous
-binary is moved aside to `<binary>.zero-update-<random>.old` first. The updater
-records that exact file — bound to its filesystem identity, in per-user state
-outside the installation directory — and deletes only that recorded copy after
-the next update is verified in place. Backups it did not create are never
-removed, so a file such as `zero.exe.before-manual-patch.old` is left alone. A
-recorded copy that something else holds open (an on-access scanner, an editor)
-stays recorded and is removed by a later update instead.
-
-An update **refuses to run** while unresolved recovery state exists beside the
-binary:
-
-| State on disk | Meaning |
-|---|---|
-| `<binary>.old` (or `<binary>.<suffix>.old`) plus a `.keep` marker, or a per-user update-recovery record naming that copy | A previous update could not restore the original binary. The `.old` file may be the last binary the updater verified; the installed one may be unverified. The `.keep` marker is in the installation directory and can be deleted; the identity-bound record is not, so deleting the marker alone does not end the refusal. |
-| `<binary>.…old.<suffix>.recovery` | A previous update could not even write the marker, so it moved the last verified binary to that name. |
-| The binary is missing and one or more `*.old` files exist | The previous attempt was interrupted between moves. |
-
-The refusal names the paths involved and the two moves that end the state:
-either move the recovery binary back over the executable path, or — if the
-installed binary is the one you want — delete the recovery copy itself (not
-only the `.keep` marker) after verifying the installed binary, then update
-again. Deleting the marker alone is not enough: a failed restore also records
-that copy in per-user state outside the installation directory, and the next
-update consults that record even if the marker is gone.
-
-That trusted record lives under `%AppData%\zero\update-recovery` (per-user).
-The recovery copy and its `.keep` marker sit in the installation directory
-(per-machine). A second Windows account on the same machine does not see the
-first account's unresolved record; the sibling marker is the machine-visible
-signal for every account. There is no separate machine-wide store: writing one
-would need a shared writable location and ACL rules the updater does not own.
-
-This is deliberately fail-closed and differs from older releases, which deleted
-`<binary>.old` and proceeded. The trade-off is that anyone who can write in the
-installation directory can plant `<binary>.old` and `<binary>.old.keep` there
-and make every subsequent update refuse until an operator clears them. That is
-the safe direction: the alternative is an update that overwrites the only
-verified copy of the previous binary. If updates start refusing, inspect those
-files before removing them — an installation directory that a lower-privileged
-account can write to is itself worth fixing.
+Installer scripts download the matching release asset for the local platform and verify its `.sha256` file. If Zero is already installed, use this command before re-running the installer.

docs/WORK_SPLIT_PRD.md

@@ -0,0 +1,286 @@
+# Zero WorkSplit PRD v3: Go-Native Product Ownership Plan
+
+Status: Draft v3.0
+Date: 2026-06-06
+Timeline: Active sprint plan toward v0.1, then v1.0 hardening
+
+Team:
+
+- Vasanth
+- Gnanam
+- Anandan
+
+## 1. Product Goal
+
+Zero is a terminal-first AI coding agent built in Go.
+
+The goal is not just to remove the old TypeScript runtime. The goal is to make Zero feel like a mature daily-driver CLI agent:
+
+- fast startup
+- strong command UX
+- safe autonomy
+- clear permission handling
+- useful local tools
+- reliable provider/runtime behavior
+- installable, updateable, and testable on real developer machines
+
+This document replaces the older migration-era work split. The Go runtime is now the main product baseline, so future work should focus on product depth rather than repeating the old M0 migration plan.
+
+## 2. Current Baseline On Main
+
+The current main branch is Go-native for the runtime and CLI.
+
+Implemented baseline:
+
+- `cmd/zero` is the primary CLI entrypoint.
+- `cmd/zero-pr-review` exists for PR automation workflows.
+- Core runtime packages live under `internal/`.
+- Current CLI surface includes `exec`, `config`, `models`, `providers`, `doctor`, `search`, `sessions`, `plugins`, `hooks`, `mcp`, `sandbox`, `update`, `worktrees`, `verify`, `changes`, `serve`, `help`, and `version`.
+- Core areas exist for agent flow, provider/model registry, tools, TUI, sessions, search, sandbox, self-verification, stream-json, usage, redaction, hooks, MCP, plugins, update, worktrees, and git/change handling.
+- TypeScript is no longer part of the repository baseline. The npm package keeps a small Node wrapper that delegates to the Go binary.
+
+Still needed before Zero feels production-ready:
+
+- Permission and sandbox UX must become clearer and harder to misuse.
+- TUI command flows need polish beyond basic rendering.
+- Platform behavior, especially Windows sandbox/update/install paths, needs stronger product ownership.
+- Review automation should produce useful, repeatable output for maintainers.
+- Release trust needs checksums, install smoke tests, and update verification.
+
+## 3. Ownership Rules
+
+- Every feature has one DRI.
+- UI, runtime, and platform work should be split by contract, not by vague file ownership.
+- Every PR must expose user-runnable behavior or a concrete contract consumed by another owner.
+- Docs, CI, and website work can support a product PR, but they should not be the whole lane for any owner.
+- Anandan must own platform product work, not only docs/site/CI.
+- Shared contracts should be agreed before large UI or integration work lands.
+- Keep PRs large enough to move the product forward, but still reviewable.
+
+## 4. Team Roles
+
+| Owner | Primary Role | Owns | Should Not Own Alone |
+| --- | --- | --- | --- |
+| Vasanth | Product UX and TUI owner | Bubble Tea TUI, startup screen, command palette, slash command UX, tool rendering, permission prompts, sandbox violation rendering, verification/test/git output UX, themes, daily CLI feel | Provider internals, release pipeline, platform adapters |
+| Gnanam | Runtime core owner | Provider/model registry, provider factory, agent/runtime protocols, stream-json, sessions/search backends, config/doctor/usage/redaction, MCP/hooks/plugins backend, sandbox policy/grants, permission event contract | TUI composition, release packaging, platform-specific install trust |
+| Anandan | Platform product owner | Install/update/release trust, binary/package smoke tests, platform sandbox adapters, Windows behavior, PR/review automation CLI, CI as product verification, performance and release checks | TUI rendering, provider semantics, model registry ownership |
+
+## 5. Anandan Platform Product Rule
+
+Anandan should not be assigned only docs/site/CI forever. His lane must produce platform behavior that users and maintainers can run.
+
+Accepted Anandan work:
+
+- `zero sandbox policy` improvements and platform-specific sandbox behavior.
+- Windows sandbox adapter behavior and clear fallback reporting.
+- `zero update` verification, release metadata validation, and install smoke tests.
+- Package and binary checksums.
+- PR automation CLI workflows that reviewers can run locally or in CI.
+- CI jobs that prove real Zero commands work after installation.
+
+Not accepted as standalone Anandan work:
+
+- Docs-only updates.
+- Website-only updates.
+- Future VS Code notes with no current CLI behavior.
+- CI matrix changes that do not prove a user-facing command or release flow.
+- Release notes or checklists without executable validation.
+
+Docs and CI are still useful, but they must attach to real platform product behavior.
+
+## 6. Shared Contracts
+
+| Contract | DRI | Consumers | Purpose |
+| --- | --- | --- | --- |
+| Provider stream events | Gnanam | Vasanth, Anandan | Lets TUI and automation render model output, tool calls, and errors consistently. |
+| Permission and sandbox events | Gnanam | Vasanth, Anandan | Lets TUI ask for decisions and platform code enforce them without bypasses. |
+| Session event schema | Gnanam | Vasanth, Anandan | Lets TUI, resume, search, and automation share one session model. |
+| Command metadata registry | Vasanth | Gnanam, Anandan | Lets slash commands, help, shell completions, and docs use one command source. |
+| Platform/release contract | Anandan | Vasanth, Gnanam | Defines install, update, checksum, smoke, and platform capability results. |
+| Stream-json protocol | Gnanam | Anandan | Lets CI and PR automation consume Zero output without scraping text UI. |
+
+## 7. Active Workstreams
+
+### A. Safe Autonomy
+
+Top priority. Zero must be able to run tools confidently while showing users what is happening and asking when risk increases.
+
+Planned PRs:
+
+- Vasanth: `feat/tui-sandbox-permissions`
+  - permission prompt UX
+  - allow, deny, and always-allow flows
+  - sandbox violation rendering
+  - `/permissions` or equivalent permission state UI
+- Gnanam: `feat/runtime-permission-events`
+  - structured permission request events
+  - sandbox grant contract
+  - stream-json support
+  - tests for denial, approval, and violation cases
+- Anandan: `feat/windows-sandbox-platform`
+  - platform sandbox capability checks
+  - stronger Windows behavior or explicit safe fallback
+  - `zero sandbox policy --json` output useful enough for CI and support
+  - platform tests where possible
+
+Done when:
+
+- High-autonomy tool attempts produce a clear prompt, decision, and result in TUI and headless modes.
+- Denied commands do not run.
+- Sandbox violations are visible and actionable.
+- Platform fallback is explicit, tested, and not silently unsafe.
+
+### B. Command UX And Daily CLI
+
+The CLI should feel like a product, not a collection of backend commands.
+
+Planned PRs:
+
+- Vasanth: `feat/tui-command-polish`
+  - `/model`, `/provider`, `/context`, `/doctor`, `/verify`, `/resume`, and `/compact` become clear interactive flows
+  - command results render consistently
+  - startup screen stays minimal until the user asks for panels
+- Gnanam: `feat/runtime-command-contracts`
+  - stable command data APIs
+  - provider/model/session/config result structs
+  - error types suitable for TUI rendering
+- Anandan: `feat/install-update-user-flow`
+  - `zero update` and install flows are user-runnable
+  - package smoke command verifies installed binary behavior
+  - CI proves the packaged command starts and reports version/help
+
+Done when:
+
+- A new user can run Zero, inspect config/provider/model state, and understand the next action without reading source.
+
+### C. Verification And Review Automation
+
+Zero should help maintainers verify changes and review PRs with repeatable local commands.
+
+Planned PRs:
+
+- Vasanth: `feat/tui-verification-results`
+  - render verify/test/git/review results in TUI
+  - show pass/fail/blocked states clearly
+- Gnanam: `feat/runtime-self-verify-contract`
+  - structured verification results
+  - stable test/change event model
+  - redacted logs for model and automation use
+- Anandan: `feat/pr-review-cli-workflow`
+  - make `cmd/zero-pr-review` or `zero review` useful for changed files, validations, and summary output
+  - support local and CI invocation
+  - avoid brittle text scraping where stream-json can be used
+
+Done when:
+
+- A maintainer can run one local command before review and get useful changed-file, validation, and risk output.
+
+### D. Release Trust And Distribution
+
+This is Anandan's main product lane after platform sandbox work.
+
+Planned PRs:
+
+- Anandan: `feat/release-trust`
+  - release metadata validation
+  - checksums
+  - install smoke tests
+  - update verification
+  - clear error output when release artifacts are invalid
+- Vasanth:
+  - consume release/update results in CLI UX where needed
+- Gnanam:
+  - ensure config, errors, and logs are structured and redacted
+
+Done when:
+
+- Users can install, run, verify, and update Zero with confidence.
+- Maintainers can prove release artifacts work before publishing.
+
+### E. Extensibility UX
+
+This comes after safe autonomy and daily CLI polish.
+
+Planned PRs:
+
+- Vasanth:
+  - `/mcp`, `/hooks`, `/plugins`, and related UI flows
+- Gnanam:
+  - harden backend contracts and lifecycle behavior
+- Anandan:
+  - automation and docs only after executable behavior exists
+
+Done when:
+
+- Extensibility feels discoverable and safe from the terminal.
+
+## 8. Immediate Next PRs
+
+These are the next reviewable slices. Do not use the old migration-era next steps.
+
+1. Vasanth: `feat/tui-sandbox-permissions`
+2. Gnanam: `feat/runtime-permission-events`
+3. Anandan: `feat/windows-sandbox-platform`
+4. Anandan: `feat/update-release-verification`
+5. Vasanth: `feat/tui-command-polish`
+6. Gnanam: `feat/session-rewind-compaction-contract`
+
+Recommended first parallel set:
+
+- Vasanth starts the TUI permission prompt and violation display.
+- Gnanam defines the permission event/grant contract.
+- Anandan owns Windows/platform sandbox reporting and tests.
+
+## 9. Command Ownership Matrix
+
+| Command Area | Vasanth | Gnanam | Anandan |
+| --- | --- | --- | --- |
+| `exec` | TUI and interactive UX | Runtime execution contract | Package smoke and platform validation |
+| `sandbox` | Prompt and violation UX | Policy, grants, and events | Platform adapters and Windows behavior |
+| `update` | Display and user messaging | Config and redacted errors | Primary owner of update verification |
+| `verify` | Result rendering | Verification backend contract | CI and release integration |
+| `changes` | TUI rendering | Change detection backend | PR automation integration |
+| `mcp`, `hooks`, `plugins`, `serve` | Discoverability and UI | Backend lifecycle and contracts | Automation/docs after behavior exists |
+| `sessions`, `search` | Resume/search UX | Storage, query, and event model | Stream-json and automation consumers |
+
+## 10. Definition Of Done
+
+For every code PR:
+
+- Add or update tests for the changed behavior.
+- Run `go test ./...` when Go files changed.
+- Run the relevant build command when CLI entrypoints changed.
+- Run package smoke checks when install/update/npm wrapper files changed.
+- Include manual CLI output or screenshots only when they prove a user-facing flow.
+
+For docs-only PRs:
+
+- State clearly that no runtime behavior changed.
+- Do not use docs-only PRs as a substitute for platform product work.
+
+For Anandan's PRs specifically:
+
+- Must include one of:
+  - user-runnable command behavior
+  - install/update/release artifact verification
+  - platform adapter behavior
+  - CI that executes real installed Zero commands
+- Docs/CI can support the PR, but cannot be the entire value.
+
+## 11. Review Rotation
+
+- Vasanth PRs:
+  - Gnanam reviews runtime contracts.
+  - Anandan reviews platform/release impact when touched.
+- Gnanam PRs:
+  - Vasanth reviews user-facing contract impact.
+  - Anandan reviews platform/protocol impact when touched.
+- Anandan PRs:
+  - Vasanth reviews user-facing CLI behavior.
+  - Gnanam reviews runtime contract and safety impact.
+
+## 12. Retired Historical Plan
+
+The old M0-M6 TypeScript-to-Go migration schedule is now historical.
+
+Do not assign new work from the old migration next-steps section. The Go migration foundation has already landed on main. Future work should move Zero from "ported" to "mature terminal coding agent."

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-</svg>

docs/assets/novita-logo-dark.svg

@@ -1,11 +0,0 @@
-<svg width="151" height="30" viewBox="0 0 151 30" fill="none" xmlns="http://www.w3.org/2000/svg">
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docs/assets/novita-logo.svg

@@ -1,11 +0,0 @@
-<svg width="151" height="30" viewBox="0 0 151 30" fill="none" xmlns="http://www.w3.org/2000/svg">
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-<defs>
-<clipPath id="clip0_125_11573">
-<rect width="45.9562" height="28.7223" fill="white" transform="translate(0.0292969 0.640625)"/>
-</clipPath>
-</defs>
-</svg>

docs/oauth-subscriptions.md

@@ -1,222 +0,0 @@
-# OAuth logins & using ChatGPT / Claude subscriptions
-
-Zero supports two distinct things people mean by "log in with OAuth":
-
-1. **OAuth login for a provider/gateway** that issues a *standard* bearer token —
-   fully built in (`zero auth login …`). Zero attaches the token to model calls
-   automatically.
-2. **Using a ChatGPT or Claude *subscription*** (Plus / Pro / Max) instead of a
-   pay-per-token API key — only possible through a **local proxy**, for the
-   reasons documented below. Zero ships a convenience preset and this recipe.
-
----
-
-## 1. OAuth login for a provider or gateway (built in)
-
-For any OAuth 2.0 / OIDC provider that returns a normal access token usable as
-`Authorization: Bearer …` on its API, configure it with `ZERO_OAUTH_<NAME>_*`
-env vars and log in:
-
-```sh
-export ZERO_OAUTH_ACME_CLIENT_ID=…
-export ZERO_OAUTH_ACME_AUTHORIZE_URL=https://acme.example/oauth/authorize
-export ZERO_OAUTH_ACME_TOKEN_URL=https://acme.example/oauth/token
-export ZERO_OAUTH_ACME_SCOPES="openid profile"
-zero auth login acme            # browser (loopback); --device for headless
-zero auth status
-```
-
-When a login exists for a provider, the **OpenAI and Anthropic** providers send
-`Authorization: Bearer <fresh-token>` (auto-refreshed; one refresh-and-retry on a
-`401`) instead of the API key. With no login they use the API key exactly as
-before. Tokens are stored 0600 (or the OS keyring with
-`ZERO_OAUTH_STORAGE=keyring`) and never logged. See `zero auth --help`.
-
-### In the setup wizard (`/provider`)
-
-Running `/provider` opens a **"How do you want to connect?"** chooser:
-
-```text
-❯ Sign in with OAuth                 One-click browser login (OpenRouter, xAI, ChatGPT, Hugging Face)
-  Paste an API key / browse providers  Any of 20+ providers, local, or a proxy
-```
-
-Pick **Sign in with OAuth** → the list of providers that do real OAuth → choose one:
-
-```text
-❯ OpenRouter      browser sign-in · creates a key
-  xAI (Grok)      browser or device code
-  ChatGPT         browser (Codex backend, ChatGPT Plus/Pro)
-  Hugging Face    browser or device code
-```
-
-- **OpenRouter / xAI / ChatGPT / Hugging Face** are real OAuth: your browser
-  opens to approve → done (no key to paste). OpenRouter mints a key; xAI /
-  ChatGPT / Hugging Face store a refreshable bearer. Hugging Face requires a
-  one-time OAuth-app registration (no secret needed for "public" apps); the
-  preset pre-fills scopes, endpoints, and the OIDC issuer. The same chooser
-  appears in first-run onboarding. (xAI uses an opt-in preset — set
-  `ZERO_OAUTH_ALLOW_PRESETS=1` or your own `ZERO_OAUTH_XAI_*`; see below.)
-- **Device code (headless / SSH):** for a provider that supports it (xAI,
-  Hugging Face), press **d** on the list to get a code to enter on another
-  device instead of opening a browser. On an SSH session or headless Linux box
-  (no `DISPLAY`) device code is used automatically; set `ZERO_OAUTH_DEVICE=1`
-  to force it anywhere. The CLI equivalent is
-  `zero auth login <name> --device`.
-- **ChatGPT / Claude are intentionally not in this list for the proxy path** —
-  use the dedicated `chatgpt-proxy` / `custom-anthropic-compatible` preset
-  (see §2) for subscription-via-proxy. ChatGPT *is* a first-class OAuth
-  provider in this version (routes to the Codex backend) — see "Built-in OAuth
-  providers" below.
-
-### Built-in OAuth providers
-
-- **OpenRouter (no env needed)** — `zero auth openrouter` opens a browser, you
-  approve, and it **mints an OpenRouter API key** (public PKCE flow, no client_id).
-  In the interactive setup wizard, pick **OpenRouter** and press **ctrl+o** at the
-  key step to do the same inline ("Log in with OAuth"). The minted key is saved to
-  the provider profile and used normally.
-- **xAI (Grok) — opt-in preset** — xAI's flow needs an OAuth `client_id`. Zero
-  ships a built-in preset for the public Grok-CLI client, but to keep third-party
-  client identities out of the default credential path it is **off by default**.
-  Enable it with `export ZERO_OAUTH_ALLOW_PRESETS=1`, then `zero auth login xai`
-  (browser, or `--device` for headless) works one-click; the token is used directly
-  on `api.x.ai/v1`. Without the opt-in, set `ZERO_OAUTH_XAI_CLIENT_ID` (and
-  endpoints, or an issuer) yourself via `ZERO_OAUTH_XAI_*`. Either way the preset is
-  fully overridable by `ZERO_OAUTH_XAI_*` (env wins), and it requires a
-  SuperGrok / X Premium+ subscription; the client_id is an undocumented public
-  Grok-CLI client that may change without notice.
-- **ChatGPT (Codex) — opt-in preset** — `zero auth chatgpt` opens a browser, you
-  approve with your ChatGPT Plus/Pro/Business/Enterprise account, and the bearer is
-  stored. The bearer routes to `https://chatgpt.com/backend-api/codex/responses`
-  (the same endpoint the openai/codex CLI uses), with `originator: codex_cli_rs` and
-  the `chatgpt-account-id` claim injected as headers on every request. The
-  `chatgpt-account-id` is extracted from the OIDC ID token and stored alongside the
-  bearer; if the claim is missing (older ChatGPT accounts, or a rotated
-  authorization server), the Codex backend will 401 and `zero auth status chatgpt`
-  will show the warning. Like xAI, the preset uses the publicly-shipped Codex CLI
-  client identity (`app_EMoamEEZ73f0CkXaXp7hrann`) and is opt-in via
-  `ZERO_OAUTH_ALLOW_PRESETS=1`. As of mid-2026 the Codex backend is
-  Cloudflare-gated: requests from a non-Codex client can still be challenged, and
-  the `chatgpt-proxy` route in §2 is the conservative fallback.
-- **Hugging Face — opt-in preset, BYO client_id** — `zero auth login huggingface`
-  (or `--device` for headless) opens a Hugging Face OAuth flow. The bearer works on
-  the OpenAI-compatible router at `https://router.huggingface.co/v1` for hundreds
-  of OSS models (Llama, Qwen, DeepSeek, Mistral, etc.). HF does not ship a
-  globally-known client_id, so the preset ships endpoints + scopes + the OIDC
-  issuer pre-filled; you must register a "public" OAuth app (no secret) at
-  <https://huggingface.co/settings/applications/new> and set the resulting
-  `client_id` via `ZERO_OAUTH_HUGGINGFACE_CLIENT_ID`. Enable the preset with
-  `ZERO_OAUTH_ALLOW_PRESETS=1` (or omit it — the BYO client_id path uses
-  `client_credentials = none` and doesn't need the opt-in). Free tier has strict
-  rate limits; Pro removes them.
-
-Any field of a preset is overridable via `ZERO_OAUTH_<NAME>_*`. For a fully custom
-OAuth/OIDC provider, set those env vars (see `zero auth --help`) and
-`zero auth login <name>`.
-
----
-
-## 2. ChatGPT / Claude subscriptions — why a proxy is required
-
-We researched this carefully. As of mid-2026, a **subscription** OAuth token does
-**not** work as a drop-in bearer against the standard APIs:
-
-- **OpenAI (ChatGPT):** a "Sign in with ChatGPT" token only works against
-  ChatGPT's own backend (`chatgpt.com/backend-api/codex/responses`, the Responses
-  API), **not** `api.openai.com`. That backend is **Cloudflare bot-protected** —
-  non-browser / headless clients get `cf-mitigated: challenge` → `403`. It also
-  requires mimicking the official Codex client (originator + account-id header).
-  **First-class path (this version):** `zero auth chatgpt` does exactly that
-  mimicking (`originator: codex_cli_rs`, `chatgpt-account-id: <claim>`) and
-  routes requests to the Codex backend, no proxy required — see §1. The
-  `chatgpt-proxy` route below is the conservative fallback when Cloudflare
-  challenges become an issue, and is the only path that works without a
-  browser-based ChatGPT OAuth login.
-- **Anthropic (Claude):** the Messages API **rejects** subscription OAuth tokens
-  for third-party use unless the request spoofs the Claude Code identity
-  (`anthropic-beta: oauth-2025-04-20`, `claude-cli` UA, and a verbatim
-  *"You are Claude Code…"* system prompt) — and **even then** tool-using requests
-  on Max plans are routed to a disabled billing lane and `400`. Anthropic's policy
-  **prohibits** subscription-token use outside Claude Code / claude.ai, and the
-  timeline hardened through 2026: a **Feb 19 2026** docs update spelled out that
-  Free/Pro/Max OAuth tokens may not be used in third-party tools or the Agent SDK,
-  then on **April 4 2026** enforcement landed and subscription OAuth tokens
-  **stopped working in third-party harnesses** (starting with OpenClaw, then the
-  rest). As of mid-2026 the only supported ways to drive Claude from a third-party
-  tool are a standard **API key** or pay-as-you-go **"Extra Usage"** billing —
-  both per-token, not the flat subscription. The request to allow subscription use
-  (claude-code #37205) was closed *"not planned."*
-
-So Zero does **not** call those backends directly or spoof those clients — that
-would be fragile, account-risky, and (for Anthropic) against the vendor's terms.
-The robust, supported pattern is a **local proxy** that holds your subscription
-session and exposes a clean OpenAI- or Anthropic-compatible endpoint on
-`127.0.0.1`. The proxy absorbs the Cloudflare / client-spoofing surface; Zero
-just points at it.
-
-### ChatGPT via a local proxy
-
-Run a local ChatGPT OAuth proxy that exposes an OpenAI-compatible endpoint (these
-typically listen on `127.0.0.1:10531/v1`). Then use the built-in **`chatgpt-proxy`**
-preset (no API key — the proxy authenticates):
-
-```jsonc
-// ~/.config/zero/config.json (or ./.zero/config.json)
-{
-  "activeProvider": "chatgpt",
-  "providers": [
-    {
-      "name": "chatgpt",
-      "catalogID": "chatgpt-proxy",     // OpenAI-compatible, local, no key
-      "baseURL": "http://localhost:10531/v1", // override for your proxy's port
-      "model": "gpt-5.5"                 // whatever model your proxy serves
-    }
-  ]
-}
-```
-
-```sh
-zero exec --prompt "say hi"   # routes through the proxy → your ChatGPT plan
-```
-
-### Claude via a local proxy
-
-There is no single canonical Claude OAuth-proxy port, so use the generic
-**`custom-anthropic-compatible`** entry pointed at your proxy's Anthropic-compatible
-endpoint:
-
-```jsonc
-{
-  "activeProvider": "claude",
-  "providers": [
-    {
-      "name": "claude",
-      "catalogID": "custom-anthropic-compatible",
-      "baseURL": "http://localhost:<port>",  // your Claude proxy
-      "apiKey": "unused-by-proxy",
-      "model": "claude-sonnet-4.5"
-    }
-  ]
-}
-```
-
----
-
-## 3. Supported alternatives (no proxy)
-
-- **API key (recommended, simplest):** set `OPENAI_API_KEY` / `ANTHROPIC_API_KEY`
-  (or per-profile `apiKey`) and use the `openai` / `anthropic` catalog providers.
-  Bills as API usage.
-- **Anthropic subscription automation, sanctioned:** spawn the real `claude` CLI
-  (e.g. `claude -p …`) as a subprocess — the only path Anthropic recognizes as a
-  first-class subscription session.
-
----
-
-## Notes
-
-- The `chatgpt-proxy` base URL / port and model are defaults you override for your
-  setup; they are not an endorsement of any specific proxy implementation.
-- Subscription-via-proxy depends on third-party tools and undocumented vendor
-  backends; it can break without notice. The API-key path is the stable one.

go.mod

@@ -1,41 +1,45 @@
 module github.com/Gitlawb/zero
 
-go 1.26.9
+go 1.25
 
 require (
-	charm.land/bubbles/v2 v2.1.1
-	charm.land/bubbletea/v2 v2.0.9
-	charm.land/lipgloss/v2 v2.0.5
-	github.com/Microsoft/go-winio v0.6.2
-	github.com/alecthomas/chroma/v2 v2.27.0
-	github.com/atotto/clipboard v0.1.4
-	github.com/aymanbagabas/go-udiff v0.4.1
-	github.com/charmbracelet/colorprofile v0.4.3
-	github.com/charmbracelet/ultraviolet v0.0.0-20260703014108-f5a850f9c2b7
-	github.com/charmbracelet/x/ansi v0.11.7
-	github.com/charmbracelet/x/term v0.2.2
-	github.com/coder/websocket v1.8.15
-	github.com/ledongthuc/pdf v0.0.0-20250511090121-5959a4027728
-	golang.org/x/image v0.45.0
-	golang.org/x/sys v0.47.0
-	gopkg.in/yaml.v3 v3.0.1
-	mvdan.cc/sh/v3 v3.13.1
+	github.com/charmbracelet/bubbles v1.0.0
+	github.com/charmbracelet/bubbletea v1.3.10
+	github.com/charmbracelet/glamour v1.0.0
+	github.com/charmbracelet/lipgloss v1.1.1-0.20250404203927-76690c660834
+	github.com/charmbracelet/x/ansi v0.11.6
+	github.com/muesli/termenv v0.16.0
+	golang.org/x/sys v0.38.0
 )
 
 require (
-	github.com/charmbracelet/x/exp/golden v0.0.0-20260615092313-b57e5e6d29bb // indirect
-	github.com/charmbracelet/x/termios v0.1.1 // indirect
-	github.com/charmbracelet/x/windows v0.2.2 // indirect
-	github.com/clipperhouse/displaywidth v0.11.0 // indirect
-	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
-	github.com/dlclark/regexp2/v2 v2.5.0 // indirect
-	github.com/go-quicktest/qt v1.102.0 // indirect
-	github.com/lucasb-eyer/go-colorful v1.4.0 // indirect
-	github.com/mattn/go-runewidth v0.0.24 // indirect
+	github.com/alecthomas/chroma/v2 v2.20.0 // indirect
+	github.com/atotto/clipboard v0.1.4 // indirect
+	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/aymerick/douceur v0.2.0 // indirect
+	github.com/charmbracelet/colorprofile v0.4.1 // indirect
+	github.com/charmbracelet/x/cellbuf v0.0.15 // indirect
+	github.com/charmbracelet/x/exp/slice v0.0.0-20250327172914-2fdc97757edf // indirect
+	github.com/charmbracelet/x/term v0.2.2 // indirect
+	github.com/clipperhouse/displaywidth v0.9.0 // indirect
+	github.com/clipperhouse/stringish v0.1.1 // indirect
+	github.com/clipperhouse/uax29/v2 v2.5.0 // indirect
+	github.com/dlclark/regexp2 v1.11.5 // indirect
+	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
+	github.com/gorilla/css v1.0.1 // indirect
+	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-localereader v0.0.1 // indirect
+	github.com/mattn/go-runewidth v0.0.19 // indirect
+	github.com/microcosm-cc/bluemonday v1.0.27 // indirect
+	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
-	github.com/rogpeppe/go-internal v1.15.0 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	golang.org/x/exp v0.0.0-20260611194520-c48552f49976 // indirect
-	golang.org/x/sync v0.22.0 // indirect
+	github.com/yuin/goldmark v1.7.13 // indirect
+	github.com/yuin/goldmark-emoji v1.0.6 // indirect
+	golang.org/x/net v0.38.0 // indirect
+	golang.org/x/term v0.36.0 // indirect
+	golang.org/x/text v0.30.0 // indirect
 )

go.sum

@@ -1,78 +1,89 @@
-charm.land/bubbles/v2 v2.1.1 h1:7r55WzBxpo/R3z98hGmY7KKPd3ET6vsf0Fb9sDHOV60=
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internal/acp/desktopinterop_test.go

@@ -1,217 +0,0 @@
-package acp
-
-// desktopinterop_test.go covers three defects found by driving the real `zero
-// acp` binary from a desktop ACP client. Each is a case where ZERO and a
-// conforming client disagreed about the wire, and none of them failed loudly —
-// they produced a silent denial, a spurious crash, or two buttons the user
-// could not tell apart.
-//
-// A fourth, session/load restoring history without replaying it, is fixed by
-// #914 rather than here: that one also gives the replayed messages stable ids
-// and keeps session/resume replay-free, which this did not.
-
-import (
-	"errors"
-	"fmt"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/agent"
-)
-
-// ---- an offered option is an acceptable answer ----
-
-// The list the options were BUILT from and the list the answer was CHECKED
-// against were different whenever ZERO did not enumerate: the client was sent
-// Allow and Reject, and its reply was validated against an empty slice, so
-// every button it could possibly show failed closed to deny. The user clicked
-// Allow and ZERO recorded a denial, with nothing on screen to say so.
-func TestAnOfferedOptionIsAccepted(t *testing.T) {
-	// No AvailableDecisions: the fallback path, which is every permission event
-	// that is not a prompt.
-	req := agent.PermissionRequest{ToolName: "bash"}
-
-	options := buildPermissionOptions(req)
-	if len(options) == 0 {
-		t.Fatal("no options were offered")
-	}
-
-	for _, option := range options {
-		decision := decisionFromOutcome(
-			RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: option.OptionID},
-			buildPermissionOptions(req),
-		)
-		if string(decision.Action) != option.OptionID {
-			t.Fatalf("option %q was answered with %q (%s) — an offered option must be accepted",
-				option.OptionID, decision.Action, decision.Reason)
-		}
-	}
-}
-
-// The narrowing this validation exists for still holds: a client must not be
-// able to return a broader grant than it was shown.
-func TestAnOptionThatWasNotOfferedIsStillRefused(t *testing.T) {
-	req := agent.PermissionRequest{ToolName: "bash"}
-
-	decision := decisionFromOutcome(
-		RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: string(agent.PermissionDecisionAlwaysAllow)},
-		buildPermissionOptions(req),
-	)
-	if decision.Action != agent.PermissionDecisionDeny {
-		t.Fatalf("an unoffered broader grant was accepted as %q", decision.Action)
-	}
-}
-
-// The resolver is the single source of truth for both sides, which is what
-// makes the two agree by construction rather than by being kept in step.
-func TestOfferedDecisionsMatchWhatWasSent(t *testing.T) {
-	for _, req := range []agent.PermissionRequest{
-		{ToolName: "bash"},
-		{ToolName: "bash", AvailableDecisions: []agent.PermissionDecisionAction{
-			agent.PermissionDecisionAllow,
-			agent.PermissionDecisionAllowForSession,
-			agent.PermissionDecisionDeny,
-		}},
-	} {
-		offered := buildPermissionOptions(req)
-		for _, option := range buildPermissionOptions(req) {
-			if !actionOffered(option.OptionID, offered) {
-				t.Fatalf("option %q was sent but is not in the offered set %v", option.OptionID, offered)
-			}
-		}
-	}
-}
-
-// ---- two options the user can tell apart ----
-
-// request_permissions offers plain allow and strict-review allow together, and
-// both were labelled "Allow". The label is the only thing an ACP client shows,
-// so the panel presented two identical buttons where one silently enabled
-// strict auto-review of what was granted.
-func TestEveryOfferedOptionHasADistinctLabel(t *testing.T) {
-	req := agent.PermissionRequest{
-		ToolName: "request_permissions",
-		AvailableDecisions: []agent.PermissionDecisionAction{
-			agent.PermissionDecisionAllow,
-			agent.PermissionDecisionAllowStrict,
-			agent.PermissionDecisionAllowForSession,
-			agent.PermissionDecisionDeny,
-		},
-	}
-
-	seen := map[string]string{}
-	for _, option := range buildPermissionOptions(req) {
-		if previous, clash := seen[option.Name]; clash {
-			t.Fatalf("options %q and %q share the label %q — a user cannot tell them apart",
-				previous, option.OptionID, option.Name)
-		}
-		seen[option.Name] = option.OptionID
-	}
-}
-
-// The two remain distinct decisions: the label changed, the round trip did not.
-func TestStrictAllowStillRoundTrips(t *testing.T) {
-	req := agent.PermissionRequest{
-		ToolName: "request_permissions",
-		AvailableDecisions: []agent.PermissionDecisionAction{
-			agent.PermissionDecisionAllow,
-			agent.PermissionDecisionAllowStrict,
-		},
-	}
-	decision := decisionFromOutcome(
-		RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: string(agent.PermissionDecisionAllowStrict)},
-		buildPermissionOptions(req),
-	)
-	if decision.Action != agent.PermissionDecisionAllowStrict {
-		t.Fatalf("strict allow round-tripped as %q", decision.Action)
-	}
-}
-
-// ---- cancelling a permission is a cancellation, not a crash ----
-
-// Only context.Canceled was recognised, so dismissing a permission dialog came
-// back as JSON-RPC -32603 carrying the internal sentinel text. Clients render
-// that as a failed turn, so declining a tool looked like ZERO falling over —
-// and for apply_patch, dismissing is the ONLY refusal a client is offered.
-func TestCancellingAPermissionEndsTheTurnAsCancelled(t *testing.T) {
-	canceled := fmt.Errorf("%w for apply_patch", agent.ErrPermissionApprovalCanceled)
-
-	reason, err := stopReasonFor(agent.Result{}, canceled)
-	if err != nil {
-		t.Fatalf("stopReasonFor returned an error for a cancellation: %v", err)
-	}
-	if reason != StopCancelled {
-		t.Fatalf("stop reason = %q, want %q", reason, StopCancelled)
-	}
-}
-
-// A genuine failure must still be an error. Mapping too much to cancelled would
-// hide real faults behind a clean ending, which is the opposite mistake.
-func TestARealFailureIsStillAnError(t *testing.T) {
-	failure := errors.New("provider exploded")
-
-	if _, err := stopReasonFor(agent.Result{}, failure); !errors.Is(err, failure) {
-		t.Fatalf("stopReasonFor(%v) = %v, want the failure preserved", failure, err)
-	}
-}
-
-// The sentinel is matched through errors.Is, so it survives the wrapping every
-// return site applies — each one adds the tool name.
-func TestPermissionCancellationSurvivesWrapping(t *testing.T) {
-	if !errors.Is(fmt.Errorf("%w for bash", agent.ErrPermissionApprovalCanceled), agent.ErrPermissionApprovalCanceled) {
-		t.Fatal("a wrapped permission cancellation was not recognised")
-	}
-	if errors.Is(errors.New("something else"), agent.ErrPermissionApprovalCanceled) {
-		t.Fatal("an unrelated error was reported as a permission cancellation")
-	}
-}
-
-// A decision that never became an option cannot be selected.
-//
-// PermissionDecisionCancel is the case that exists today: optionKindFor drops
-// it because ACP expresses cancellation through the outcome, yet ZERO
-// enumerates it in AvailableDecisions for shell commands and apply_patch. While
-// the reply was validated against the DECISIONS rather than the sent options, a
-// client could return {"outcome":"selected","optionId":"cancel"} — an id it was
-// never shown — and abort the whole turn.
-//
-// Written over every option-less decision rather than over "cancel", so a
-// future action that optionKindFor declines to render is covered the day it is
-// added rather than the day someone remembers this test.
-func TestADecisionThatIsNotAnOptionCannotBeSelected(t *testing.T) {
-	for _, toolName := range []string{"bash", "apply_patch"} {
-		req := agent.PermissionRequest{
-			ToolName: toolName,
-			AvailableDecisions: []agent.PermissionDecisionAction{
-				agent.PermissionDecisionAllow,
-				agent.PermissionDecisionDeny,
-				agent.PermissionDecisionCancel,
-			},
-		}
-		options := buildPermissionOptions(req)
-
-		for _, action := range req.AvailableDecisions {
-			if actionOffered(string(action), options) {
-				continue // it was sent; selecting it is legitimate
-			}
-			decision := decisionFromOutcome(
-				RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: string(action)},
-				options,
-			)
-			if decision.Action != agent.PermissionDecisionDeny {
-				t.Fatalf("%s: %q was never sent as an option but was accepted as %q",
-					toolName, action, decision.Action)
-			}
-		}
-	}
-}
-
-// Cancelling is still reachable — through the outcome, which is where ACP puts
-// it. Closing the selected-id route must not close the real one.
-func TestCancellingThroughTheOutcomeStillWorks(t *testing.T) {
-	options := buildPermissionOptions(agent.PermissionRequest{ToolName: "apply_patch"})
-
-	decision := decisionFromOutcome(RequestPermissionOutcome{Outcome: OutcomeCancelled}, options)
-	if decision.Action != agent.PermissionDecisionCancel {
-		t.Fatalf("outcome=cancelled gave %q, want cancel", decision.Action)
-	}
-}

internal/acp/export_test.go

@@ -1,11 +0,0 @@
-// Test seams: helpers only test code uses, kept out of the production binary.
-package acp
-
-import "context"
-
-// Serve runs the connection read loop until the stream closes or ctx is done.
-func (a *Agent) Serve(ctx context.Context) error { return a.conn.Serve(ctx) }
-
-func ImageBlock(base64Data, mimeType string) ContentBlock {
-	return ContentBlock{Type: "image", Data: base64Data, MimeType: mimeType}
-}

internal/acp/jsonrpc.go

@@ -1,496 +0,0 @@
-// Package acp implements the Agent Client Protocol (ACP) surface for ZERO: a
-// JSON-RPC 2.0 peer spoken over stdio (newline-delimited JSON) so editors such
-// as Zed, JetBrains, and Neovim can drive ZERO's agent core as a backend.
-//
-// The protocol shapes (method names, message fields) are derived solely from the
-// public, Apache-licensed ACP specification at agentclientprotocol.com and the
-// agentclientprotocol/agent-client-protocol repository (schema/v1). All logic
-// here is written originally against ZERO's own interfaces.
-package acp
-
-import (
-	"bufio"
-	"bytes"
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"sync"
-	"sync/atomic"
-)
-
-// JSON-RPC 2.0 standard error codes.
-const (
-	codeParseError     = -32700
-	codeInvalidRequest = -32600
-	codeMethodNotFound = -32601
-	codeInvalidParams  = -32602
-	codeInternalError  = -32603
-)
-
-// rpcError is a JSON-RPC 2.0 error object.
-type rpcError struct {
-	Code    int             `json:"code"`
-	Message string          `json:"message"`
-	Data    json.RawMessage `json:"data,omitempty"`
-}
-
-func (e *rpcError) Error() string {
-	if e == nil {
-		return "<nil rpc error>"
-	}
-	return fmt.Sprintf("jsonrpc error %d: %s", e.Code, e.Message)
-}
-
-// RPCError builds a protocol error to return from a handler. Use it when a
-// handler needs to control the wire-level error code; any other error a handler
-// returns is reported as a generic internal error.
-func RPCError(code int, message string) error {
-	return &rpcError{Code: code, Message: message}
-}
-
-// rpcMessage is the union of request, response, and notification frames. The
-// shape is disambiguated by which fields are present (per JSON-RPC 2.0):
-//   - request:      method + id
-//   - notification: method, no id
-//   - response:     id + (result | error), no method
-type rpcMessage struct {
-	JSONRPC string          `json:"jsonrpc"`
-	ID      json.RawMessage `json:"id,omitempty"`
-	Method  string          `json:"method,omitempty"`
-	Params  json.RawMessage `json:"params,omitempty"`
-	Result  json.RawMessage `json:"result,omitempty"`
-	Error   *rpcError       `json:"error,omitempty"`
-}
-
-func (m rpcMessage) isResponse() bool { return m.Method == "" && len(m.ID) > 0 }
-func (m rpcMessage) isRequest() bool  { return m.Method != "" && len(m.ID) > 0 }
-func (m rpcMessage) isNotify() bool   { return m.Method != "" && len(m.ID) == 0 }
-
-// HandlerFunc handles an inbound request and returns the result to encode, or an
-// error. Returning an *rpcError controls the wire code; any other error becomes
-// a generic internal error.
-type HandlerFunc func(ctx context.Context, params json.RawMessage) (any, error)
-
-// NotifyFunc handles an inbound notification (no response is sent).
-type NotifyFunc func(ctx context.Context, params json.RawMessage)
-
-// Conn is a JSON-RPC 2.0 peer over a single ndjson stream pair. It both serves
-// inbound requests/notifications (via registered handlers) and issues outbound
-// requests/notifications — needed because ACP is bidirectional (the agent calls
-// the client for session/request_permission, fs/*, terminal/*).
-type Conn struct {
-	rawReader    io.Reader // wrapped lazily in Serve, once ctx is known — see interruptibleReader
-	readerCloser io.Closer
-	w            io.Writer
-
-	writeMu sync.Mutex // serializes all writes to w
-
-	handlers  map[string]HandlerFunc
-	notifiers map[string]NotifyFunc
-	// Notifications for one method are an ordered stream: session/update in
-	// particular is stateful, so dispatching every frame in an unrelated
-	// goroutine can make a later chunk overtake an earlier one. Different
-	// methods retain independent tails, keeping session/cancel responsive while
-	// an update handler is busy.
-	notifyMu    sync.Mutex
-	notifyTails map[string]chan struct{}
-
-	mu      sync.Mutex
-	nextID  int64
-	pending map[int64]chan rpcMessage
-	closed  bool
-
-	wg sync.WaitGroup // tracks in-flight inbound handlers
-}
-
-// NewConn builds a peer reading ndjson from r and writing ndjson to w. This
-// Conn does not own r: cancelling Serve's context cannot forcibly close it, so
-// a Read on r that's genuinely idle (never returns on its own) leaves Serve
-// blocked until r itself produces something — e.g. a test that closes r's own
-// write side to unblock it. Use NewOwnedConn when this Conn should own r's
-// lifetime.
-func NewConn(r io.Reader, w io.Writer) *Conn {
-	return &Conn{
-		rawReader:   r,
-		w:           w,
-		handlers:    make(map[string]HandlerFunc),
-		notifiers:   make(map[string]NotifyFunc),
-		notifyTails: make(map[string]chan struct{}),
-		pending:     make(map[int64]chan rpcMessage),
-	}
-}
-
-// NewOwnedConn is like NewConn but declares that this Conn exclusively owns r:
-// if r implements io.Closer, Serve closes it on context cancellation to
-// interrupt an otherwise-idle blocking Read. Only pass a reader whose lifetime
-// this Conn should control — e.g. the process's own stdin — never a reader a
-// caller retains or shares elsewhere, since cancellation tears it down
-// permanently for every consumer, not just this Conn.
-func NewOwnedConn(r io.Reader, w io.Writer) *Conn {
-	c := NewConn(r, w)
-	c.readerCloser, _ = r.(io.Closer)
-	return c
-}
-
-// Handle registers a request handler for method.
-func (c *Conn) Handle(method string, fn HandlerFunc) { c.handlers[method] = fn }
-
-// HandleNotify registers a notification handler for method.
-func (c *Conn) HandleNotify(method string, fn NotifyFunc) { c.notifiers[method] = fn }
-
-// Serve runs the read loop until the stream ends, ctx is cancelled, or a fatal
-// decode error occurs. Inbound requests and notifications are dispatched on
-// their own goroutines so a long-running handler (e.g. session/prompt) never
-// blocks the loop from delivering session/cancel or a permission response.
-func (c *Conn) Serve(ctx context.Context) error {
-	ctx, cancel := context.WithCancel(ctx)
-	// On exit, cancel in-flight handlers (so a blocked outbound Call unblocks via
-	// ctx) and then wait for them to finish writing their responses. Without this,
-	// a finite input stream (e.g. piped ndjson that EOFs right after a request)
-	// would race the dispatch goroutine and drop the response.
-	defer func() {
-		cancel()
-		c.wg.Wait()
-	}()
-
-	interruptible := newInterruptibleReader(ctx, c.rawReader, c.readerCloser)
-	reader := bufio.NewReader(interruptible)
-
-	for {
-		// One ndjson value per line. Framing per line (rather than streaming the
-		// decoder) keeps a single malformed line from making the whole connection
-		// unrecoverable — we report -32700 and continue.
-		//
-		// generation brackets this SPECIFIC ReadBytes call: bufio may invoke
-		// interruptible.Read zero or more times underneath it (zero when the
-		// answer is already sitting in bufio's own buffer — including a
-		// previously-buffered, not-yet-surfaced error: bufio can return a
-		// complete line with a nil error while quietly caching an error it
-		// received ALONGSIDE that line's bytes, which then surfaces on the VERY
-		// NEXT call with no further contact with interruptible.Read at all). The
-		// generation only advances inside interruptible.Read's own cancellation
-		// branch, so "unchanged across this call" is proof this call's outcome
-		// didn't pass through that branch — whether because it was answered from
-		// the buffer or because it raced ctx.Done() and won. Only that proof
-		// makes it safe to call the outcome genuine.
-		before := interruptible.generation()
-		line, err := reader.ReadBytes('\n')
-		interrupted := interruptible.generation() != before
-
-		if len(bytes.TrimSpace(line)) > 0 {
-			c.handleLine(ctx, line)
-		}
-		if err != nil {
-			c.failAllPending(err)
-			if errors.Is(err, io.EOF) || interrupted {
-				return nil
-			}
-			return err
-		}
-	}
-}
-
-// interruptibleReader wraps a reader so a context cancellation can unblock a
-// currently in-flight Read without ever discarding — or misattributing — the
-// real outcome of a call that wasn't actually blocked.
-//
-// Each Read runs the underlying call on its own goroutine and races it against
-// ctx.Done(). If the underlying call finishes first, its result is returned
-// exactly as received; ctx being cancelled a moment later has no bearing on a
-// call that already had its answer. If ctx.Done() fires first, closer (when
-// non-nil) is closed to nudge a genuinely blocked read, the generation counter
-// is bumped, and the call STILL waits for and returns the underlying call's own
-// result — never a synthesized one — since closing a reader's outcome is
-// whatever the reader itself reports for it, not ours to invent.
-//
-// The counter is what lets Serve tell a call that was actually raced against
-// cancellation apart from one merely answered while cancellation happened to be
-// pending — the distinction the read loop's own doc comment explains.
-type interruptibleReader struct {
-	inner  io.Reader
-	closer io.Closer
-	ctx    context.Context
-
-	closeOnce sync.Once
-	gen       atomic.Int64
-}
-
-func newInterruptibleReader(ctx context.Context, inner io.Reader, closer io.Closer) *interruptibleReader {
-	return &interruptibleReader{inner: inner, closer: closer, ctx: ctx}
-}
-
-func (r *interruptibleReader) generation() int64 { return r.gen.Load() }
-
-type interruptibleReadResult struct {
-	n   int
-	err error
-}
-
-// interruptibleReadDecision arbitrates whether an underlying Read completed or
-// cancellation claimed it first. Completion is recorded before the result is
-// published so cancellation cannot misclassify a finished read merely because
-// its goroutine has not sent the result yet.
-type interruptibleReadDecision struct {
-	once sync.Once
-}
-
-func (d *interruptibleReadDecision) complete() { d.once.Do(func() {}) }
-
-func (d *interruptibleReadDecision) interrupt() (claimed bool) {
-	d.once.Do(func() { claimed = true })
-	return claimed
-}
-
-// readInner records completion in the Read call's deferred epilogue. It also
-// converts a reader panic into a terminal error so the helper goroutine always
-// publishes a result for Read to join.
-func (r *interruptibleReader) readInner(p []byte, decision *interruptibleReadDecision) (res interruptibleReadResult) {
-	defer func() {
-		if recovered := recover(); recovered != nil {
-			res = interruptibleReadResult{err: fmt.Errorf("acp: reader panicked: %v", recovered)}
-		}
-		decision.complete()
-	}()
-	res.n, res.err = r.inner.Read(p)
-	return res
-}
-
-func (r *interruptibleReader) Read(p []byte) (int, error) {
-	resultCh := make(chan interruptibleReadResult, 1)
-	var decision interruptibleReadDecision
-	go func() {
-		resultCh <- r.readInner(p, &decision)
-	}()
-	select {
-	case res := <-resultCh:
-		return res.n, res.err
-	case <-r.ctx.Done():
-		// resultCh may not be readable yet even when inner.Read has returned: its
-		// goroutine can be descheduled between recording completion and publishing
-		// the result. Only interrupt a call that cancellation actually claims.
-		if decision.interrupt() {
-			r.gen.Add(1)
-			if r.closer != nil {
-				r.closeOnce.Do(func() { _ = r.closer.Close() })
-			}
-		}
-		// Wait for the real result rather than returning synthetically: p is
-		// still being written by the goroutine above until it does, so returning
-		// early would race that write, and the actual error (whatever closing
-		// the reader produced, or whatever the reader was already about to
-		// report) is what the caller should see.
-		res := <-resultCh
-		return res.n, res.err
-	}
-}
-
-// handleLine decodes and dispatches one ndjson frame. A parse failure replies
-// with -32700 (id null) and keeps the connection alive.
-func (c *Conn) handleLine(ctx context.Context, line []byte) {
-	var msg rpcMessage
-	if err := json.Unmarshal(bytes.TrimSpace(line), &msg); err != nil {
-		c.writeError(json.RawMessage("null"), &rpcError{Code: codeParseError, Message: "parse error"})
-		return
-	}
-	if msg.JSONRPC != "" && msg.JSONRPC != "2.0" {
-		if len(msg.ID) > 0 {
-			c.writeError(msg.ID, &rpcError{Code: codeInvalidRequest, Message: "unsupported jsonrpc version"})
-		}
-		return
-	}
-	switch {
-	case msg.isResponse():
-		c.deliver(msg)
-	case msg.isRequest():
-		c.wg.Add(1)
-		go func(m rpcMessage) {
-			defer c.wg.Done()
-			c.dispatchRequest(ctx, m)
-		}(msg)
-	case msg.isNotify():
-		if fn := c.notifiers[msg.Method]; fn != nil {
-			c.dispatchNotification(ctx, msg, fn)
-		}
-	default:
-		// Malformed frame; reply only if we can identify a request id.
-		if len(msg.ID) > 0 {
-			c.writeError(msg.ID, &rpcError{Code: codeInvalidRequest, Message: "invalid request"})
-		}
-	}
-}
-
-// dispatchNotification preserves wire order within one method without making
-// unrelated notification methods wait for each other. The read loop installs
-// each tail before starting its goroutine, so goroutine scheduling cannot
-// reorder the chain it observes.
-func (c *Conn) dispatchNotification(ctx context.Context, msg rpcMessage, fn NotifyFunc) {
-	c.notifyMu.Lock()
-	previous := c.notifyTails[msg.Method]
-	done := make(chan struct{})
-	c.notifyTails[msg.Method] = done
-	c.notifyMu.Unlock()
-
-	c.wg.Add(1)
-	go func() {
-		defer c.wg.Done()
-		defer func() {
-			close(done)
-			c.notifyMu.Lock()
-			if c.notifyTails[msg.Method] == done {
-				delete(c.notifyTails, msg.Method)
-			}
-			c.notifyMu.Unlock()
-		}()
-		if previous != nil {
-			<-previous
-		}
-		fn(ctx, msg.Params)
-	}()
-}
-
-func (c *Conn) dispatchRequest(ctx context.Context, msg rpcMessage) {
-	fn := c.handlers[msg.Method]
-	if fn == nil {
-		c.writeError(msg.ID, &rpcError{Code: codeMethodNotFound, Message: "method not found: " + msg.Method})
-		return
-	}
-	result, err := fn(ctx, msg.Params)
-	if err != nil {
-		var re *rpcError
-		if errors.As(err, &re) {
-			c.writeError(msg.ID, re)
-		} else {
-			c.writeError(msg.ID, &rpcError{Code: codeInternalError, Message: err.Error()})
-		}
-		return
-	}
-	c.writeResult(msg.ID, result)
-}
-
-// Call issues an outbound request and blocks until the response arrives, ctx is
-// cancelled, or the connection closes.
-func (c *Conn) Call(ctx context.Context, method string, params any, result any) error {
-	raw, err := marshalParams(params)
-	if err != nil {
-		return err
-	}
-
-	c.mu.Lock()
-	if c.closed {
-		c.mu.Unlock()
-		return errors.New("acp: connection closed")
-	}
-	c.nextID++
-	id := c.nextID
-	ch := make(chan rpcMessage, 1)
-	c.pending[id] = ch
-	c.mu.Unlock()
-
-	defer func() {
-		c.mu.Lock()
-		delete(c.pending, id)
-		c.mu.Unlock()
-	}()
-
-	idRaw, _ := json.Marshal(id)
-	if err := c.write(rpcMessage{JSONRPC: "2.0", ID: idRaw, Method: method, Params: raw}); err != nil {
-		return err
-	}
-
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	case resp := <-ch:
-		if resp.Error != nil {
-			return resp.Error
-		}
-		if result != nil && len(resp.Result) > 0 {
-			return json.Unmarshal(resp.Result, result)
-		}
-		return nil
-	}
-}
-
-// Notify issues an outbound notification (no response expected).
-func (c *Conn) Notify(method string, params any) error {
-	raw, err := marshalParams(params)
-	if err != nil {
-		return err
-	}
-	return c.write(rpcMessage{JSONRPC: "2.0", Method: method, Params: raw})
-}
-
-func (c *Conn) deliver(msg rpcMessage) {
-	var id int64
-	if err := json.Unmarshal(msg.ID, &id); err != nil {
-		return
-	}
-	c.mu.Lock()
-	ch := c.pending[id]
-	delete(c.pending, id)
-	c.mu.Unlock()
-	if ch == nil {
-		return
-	}
-	// Non-blocking: the pending channel is cap-1 and may have been abandoned (e.g.
-	// a Call cancelled by session/cancel). A duplicate or late response frame must
-	// never block the read-loop goroutine.
-	select {
-	case ch <- msg:
-	default:
-	}
-}
-
-func (c *Conn) failAllPending(err error) {
-	c.mu.Lock()
-	c.closed = true
-	pending := c.pending
-	c.pending = make(map[int64]chan rpcMessage)
-	c.mu.Unlock()
-	for _, ch := range pending {
-		select {
-		case ch <- rpcMessage{Error: &rpcError{Code: codeInternalError, Message: err.Error()}}:
-		default:
-		}
-	}
-}
-
-func (c *Conn) writeResult(id json.RawMessage, result any) {
-	raw, err := json.Marshal(result)
-	if err != nil {
-		c.writeError(id, &rpcError{Code: codeInternalError, Message: err.Error()})
-		return
-	}
-	_ = c.write(rpcMessage{JSONRPC: "2.0", ID: id, Result: raw})
-}
-
-func (c *Conn) writeError(id json.RawMessage, e *rpcError) {
-	_ = c.write(rpcMessage{JSONRPC: "2.0", ID: id, Error: e})
-}
-
-func (c *Conn) write(msg rpcMessage) error {
-	msg.JSONRPC = "2.0"
-	data, err := json.Marshal(msg)
-	if err != nil {
-		return err
-	}
-	c.writeMu.Lock()
-	defer c.writeMu.Unlock()
-	if _, err := c.w.Write(append(data, '\n')); err != nil {
-		return err
-	}
-	return nil
-}
-
-// marshalParams encodes params, treating nil as an absent params field.
-func marshalParams(params any) (json.RawMessage, error) {
-	if params == nil {
-		return nil, nil
-	}
-	if raw, ok := params.(json.RawMessage); ok {
-		return raw, nil
-	}
-	return json.Marshal(params)
-}

internal/acp/jsonrpc_test.go

@@ -1,567 +0,0 @@
-package acp
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"io"
-	"sync"
-	"sync/atomic"
-	"testing"
-	"time"
-)
-
-type testReadCloser struct {
-	read  func([]byte) (int, error)
-	close func() error
-}
-
-func (r testReadCloser) Read(p []byte) (int, error) { return r.read(p) }
-func (r testReadCloser) Close() error               { return r.close() }
-
-type testReader func([]byte) (int, error)
-
-func (r testReader) Read(p []byte) (int, error) { return r(p) }
-
-type testWriter func([]byte) (int, error)
-
-func (w testWriter) Write(p []byte) (int, error) { return w(p) }
-
-// connPair wires two Conns together over in-memory pipes and serves both.
-func connPair(t *testing.T) (a, b *Conn, stop func()) {
-	t.Helper()
-	ar, bw := io.Pipe() // b -> a
-	br, aw := io.Pipe() // a -> b
-	a = NewConn(ar, aw)
-	b = NewConn(br, bw)
-	ctx, cancel := context.WithCancel(context.Background())
-	go func() { _ = a.Serve(ctx) }()
-	go func() { _ = b.Serve(ctx) }()
-	return a, b, func() {
-		cancel()
-		_ = aw.Close()
-		_ = bw.Close()
-	}
-}
-
-func TestConnServeCancellationInterruptsIdleRead(t *testing.T) {
-	pipeReader, writer := io.Pipe()
-	t.Cleanup(func() { _ = writer.Close() })
-	// Buffered + non-blocking send, not close: interruptibleReader retries each
-	// underlying Read on its own goroutine, so if bufio ever calls this more than
-	// once, a close() here would panic on the second call.
-	readStarted := make(chan struct{}, 1)
-	closeCalls := make(chan struct{}, 2)
-	reader := testReadCloser{
-		read: func(p []byte) (int, error) {
-			select {
-			case readStarted <- struct{}{}:
-			default:
-			}
-			return pipeReader.Read(p)
-		},
-		close: func() error {
-			closeCalls <- struct{}{}
-			return pipeReader.Close()
-		},
-	}
-	conn := NewOwnedConn(reader, io.Discard)
-	ctx, cancel := context.WithCancel(context.Background())
-	done := make(chan error, 1)
-	go func() { done <- conn.Serve(ctx) }()
-
-	<-readStarted
-	cancel()
-	select {
-	case err := <-done:
-		if err != nil {
-			t.Fatalf("Serve returned %v after cancellation, want nil", err)
-		}
-	case <-time.After(time.Second):
-		t.Fatal("Serve did not return after cancelling an idle connection")
-	}
-	if got := len(closeCalls); got != 1 {
-		t.Fatalf("reader Close calls = %d, want 1", got)
-	}
-}
-
-func TestConnServePreservesTerminalReadErrorDuringCancellation(t *testing.T) {
-	for _, closable := range []bool{false, true} {
-		name := "non-closable"
-		if closable {
-			name = "closable"
-		}
-		t.Run(name, func(t *testing.T) {
-			wantErr := errors.New("read failed")
-			read := testReader(func(p []byte) (int, error) {
-				return copy(p, "not json"), wantErr
-			})
-			closeCalls := make(chan struct{}, 1)
-			var reader io.Reader = read
-			if closable {
-				reader = testReadCloser{
-					read: read,
-					close: func() error {
-						closeCalls <- struct{}{}
-						return nil
-					},
-				}
-			}
-			// Buffered + non-blocking send, not close: a later change adding a
-			// second write (e.g. an additional error frame) must not panic on a
-			// repeated close of an already-closed channel.
-			writeStarted := make(chan struct{}, 1)
-			releaseWrite := make(chan struct{})
-			writer := testWriter(func(p []byte) (int, error) {
-				select {
-				case writeStarted <- struct{}{}:
-				default:
-				}
-				<-releaseWrite
-				return len(p), nil
-			})
-			newConn := NewConn
-			if closable {
-				// Ownership matters here: this case exists to prove that even a
-				// Conn entitled to close its reader on cancellation still
-				// preserves a terminal error that was already decided.
-				newConn = NewOwnedConn
-			}
-			conn := newConn(reader, writer)
-			ctx, cancel := context.WithCancel(context.Background())
-			done := make(chan error, 1)
-			go func() { done <- conn.Serve(ctx) }()
-
-			<-writeStarted
-			cancel()
-			close(releaseWrite)
-			select {
-			case err := <-done:
-				if !errors.Is(err, wantErr) {
-					t.Fatalf("Serve returned %v, want terminal read error %v", err, wantErr)
-				}
-			case <-time.After(time.Second):
-				t.Fatal("Serve did not return after terminal read error")
-			}
-			if got := len(closeCalls); got != 0 {
-				t.Fatalf("reader Close calls = %d, want 0 after terminal read", got)
-			}
-		})
-	}
-}
-
-// TestConnServePreservesReadErrorBufferedAlongsideAPriorLine is the deterministic
-// regression test for jatmn's #782 finding: a real, non-EOF ReadBytes failure can
-// be DECIDED before cancellation ever happens, yet only SURFACE afterward, and
-// must still be reported rather than swallowed as a clean shutdown.
-//
-// bufio.Reader can obtain data AND a terminal error from ONE underlying Read call
-// (io.Reader explicitly permits returning (n>0, err) together). If a delimiter is
-// found within that data, ReadBytes returns the line with a nil error for THIS
-// call, but bufio caches the error internally and returns it — WITHOUT calling the
-// underlying reader again — on the very next ReadBytes call. This test forces that
-// exact sequence: the underlying reader hands back one complete, validly-framed
-// line together with wantErr in a SINGLE call (asserted below to be its ONLY
-// call), the loop dispatches that line through a synchronous path that blocks the
-// read loop, cancellation is asserted to have happened before the loop attempts
-// its next read, and only then is the block released. By the time the read loop
-// asks for more input, cancellation is already in effect and the underlying
-// reader is never touched again — so if Serve attributed the resulting error to
-// cancellation merely because ctx was already done, it would incorrectly return
-// nil. It must instead recognize that this read was answered entirely from
-// bufio's own cache, never raced against ctx.Done(), and report wantErr.
-func TestConnServePreservesReadErrorBufferedAlongsideAPriorLine(t *testing.T) {
-	wantErr := errors.New("read failed")
-	var readCalls atomic.Int32
-	read := testReader(func(p []byte) (int, error) {
-		readCalls.Add(1)
-		// An unsupported jsonrpc version with an id takes the SYNCHRONOUS
-		// writeError path in handleLine (not a dispatched goroutine), giving this
-		// test a reliable blocking point between processing this line and the
-		// loop's next ReadBytes call.
-		return copy(p, `{"jsonrpc":"1.0","id":1}`+"\n"), wantErr
-	})
-	writeStarted := make(chan struct{}, 1)
-	releaseWrite := make(chan struct{})
-	var releaseWriteOnce sync.Once
-	release := func() { releaseWriteOnce.Do(func() { close(releaseWrite) }) }
-	t.Cleanup(release)
-	writer := testWriter(func(p []byte) (int, error) {
-		select {
-		case writeStarted <- struct{}{}:
-		default:
-		}
-		<-releaseWrite
-		return len(p), nil
-	})
-	conn := NewConn(read, writer)
-	ctx, cancel := context.WithCancel(context.Background())
-	done := make(chan error, 1)
-	go func() { done <- conn.Serve(ctx) }()
-
-	// The synchronous write confirms the first (and, per the panic guard above,
-	// only) read has already returned and is being processed — cancelling now
-	// lands squarely in the gap between that read and the loop's next one, never
-	// racing an in-flight interruptibleReader.Read call.
-	select {
-	case <-writeStarted:
-	case <-time.After(time.Second):
-		t.Fatal("Serve did not reach the synchronous write")
-	}
-	cancel()
-	release()
-
-	select {
-	case err := <-done:
-		if !errors.Is(err, wantErr) {
-			t.Fatalf("Serve returned %v, want the buffered terminal read error %v", err, wantErr)
-		}
-	case <-time.After(time.Second):
-		t.Fatal("Serve did not return after the buffered terminal read error")
-	}
-	if got := readCalls.Load(); got != 1 {
-		t.Fatalf("underlying Read calls = %d, want exactly 1 (bufio must have served the second ReadBytes from its cache)", got)
-	}
-}
-
-// TestInterruptibleReaderPrefersDecidedResultOverCancellation is the regression
-// test for jatmn's second #782 finding: interruptibleReader.Read's select
-// between resultCh and ctx.Done() chooses pseudo-randomly when both are ready,
-// so a real, already-decided outcome (e.g. a terminal transport error) could be
-// misattributed to cancellation purely because ctx also happened to be done by
-// the time the select ran. Each iteration lets the underlying Read return (so
-// resultCh already holds the real outcome) before cancelling, maximizing the
-// odds of landing exactly in that ambiguous window; the generation counter must
-// never advance when the real, already-decided result is what gets returned.
-func TestInterruptibleReaderPrefersDecidedResultOverCancellation(t *testing.T) {
-	wantErr := errors.New("read failed")
-	for i := 0; i < 100; i++ {
-		resultReady := make(chan struct{})
-		read := testReader(func(p []byte) (int, error) {
-			defer close(resultReady)
-			return copy(p, "x"), wantErr
-		})
-		ctx, cancel := context.WithCancel(context.Background())
-		r := newInterruptibleReader(ctx, read, nil)
-
-		readDone := make(chan interruptibleReadResult, 1)
-		go func() {
-			n, err := r.Read(make([]byte, 8))
-			readDone <- interruptibleReadResult{n, err}
-		}()
-
-		<-resultReady
-		time.Sleep(time.Millisecond) // bias resultCh's send ahead of cancel
-		cancel()
-
-		res := <-readDone
-		if !errors.Is(res.err, wantErr) {
-			t.Fatalf("iteration %d: Read returned %v, want %v", i, res.err, wantErr)
-		}
-		if got := r.generation(); got != 0 {
-			t.Fatalf("iteration %d: generation = %d, want 0 (a decided result must never be attributed to cancellation)", i, got)
-		}
-		cancel()
-	}
-}
-
-// TestInterruptibleReadCompletionWinsBeforeResultPublication exercises the
-// actual inner-read wrapper at the handoff between the underlying Read and the
-// helper goroutine's result publication. Cancellation must not reclassify a
-// result returned by this wrapper as interrupted.
-func TestInterruptibleReadCompletionWinsBeforeResultPublication(t *testing.T) {
-	wantErr := errors.New("read failed")
-	read := testReader(func(p []byte) (int, error) {
-		return copy(p, "x"), wantErr
-	})
-	r := newInterruptibleReader(context.Background(), read, nil)
-	var decision interruptibleReadDecision
-	readComplete := make(chan struct{})
-	resultCh := make(chan interruptibleReadResult)
-	go func() {
-		res := r.readInner(make([]byte, 8), &decision)
-		close(readComplete)
-		resultCh <- res
-	}()
-
-	<-readComplete
-	if decision.interrupt() {
-		t.Fatal("cancellation claimed a read that completed before result publication")
-	}
-	res := <-resultCh
-	if res.n != 1 || !errors.Is(res.err, wantErr) {
-		t.Fatalf("inner read result = (%d, %v), want (1, %v)", res.n, res.err, wantErr)
-	}
-}
-
-func TestConnServeReportsReaderPanicAsTerminalError(t *testing.T) {
-	read := testReader(func([]byte) (int, error) {
-		panic("boom")
-	})
-	conn := NewConn(read, io.Discard)
-	done := make(chan error, 1)
-	go func() { done <- conn.Serve(context.Background()) }()
-
-	select {
-	case err := <-done:
-		const want = "acp: reader panicked: boom"
-		if err == nil || err.Error() != want {
-			t.Fatalf("Serve returned %v, want %q", err, want)
-		}
-	case <-time.After(time.Second):
-		t.Fatal("Serve did not return after reader panic")
-	}
-}
-
-func TestConnRequestResponse(t *testing.T) {
-	a, b, stop := connPair(t)
-	defer stop()
-
-	b.Handle("add", func(_ context.Context, params json.RawMessage) (any, error) {
-		var in struct{ X, Y int }
-		if err := json.Unmarshal(params, &in); err != nil {
-			return nil, RPCError(codeInvalidParams, "bad params")
-		}
-		return map[string]int{"sum": in.X + in.Y}, nil
-	})
-
-	var out struct{ Sum int }
-	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
-	defer cancel()
-	if err := a.Call(ctx, "add", map[string]int{"X": 2, "Y": 3}, &out); err != nil {
-		t.Fatalf("call: %v", err)
-	}
-	if out.Sum != 5 {
-		t.Fatalf("sum = %d, want 5", out.Sum)
-	}
-}
-
-func TestConnNotification(t *testing.T) {
-	a, b, stop := connPair(t)
-	defer stop()
-
-	got := make(chan string, 1)
-	b.HandleNotify("ping", func(_ context.Context, params json.RawMessage) {
-		var in struct{ Msg string }
-		_ = json.Unmarshal(params, &in)
-		got <- in.Msg
-	})
-
-	if err := a.Notify("ping", map[string]string{"Msg": "hello"}); err != nil {
-		t.Fatalf("notify: %v", err)
-	}
-	select {
-	case msg := <-got:
-		if msg != "hello" {
-			t.Fatalf("got %q, want hello", msg)
-		}
-	case <-time.After(2 * time.Second):
-		t.Fatal("notification not delivered")
-	}
-}
-
-func TestConnNotificationsForOneMethodStayInWireOrder(t *testing.T) {
-	a, b, stop := connPair(t)
-	defer stop()
-
-	firstStarted := make(chan struct{})
-	releaseFirst := make(chan struct{})
-	delivered := make(chan int, 2)
-	b.HandleNotify("update", func(_ context.Context, params json.RawMessage) {
-		var in struct{ Sequence int }
-		_ = json.Unmarshal(params, &in)
-		if in.Sequence == 1 {
-			close(firstStarted)
-			<-releaseFirst
-		}
-		delivered <- in.Sequence
-	})
-
-	if err := a.Notify("update", map[string]int{"Sequence": 1}); err != nil {
-		t.Fatalf("first notify: %v", err)
-	}
-	select {
-	case <-firstStarted:
-	case <-time.After(2 * time.Second):
-		t.Fatal("first notification did not start")
-	}
-	if err := a.Notify("update", map[string]int{"Sequence": 2}); err != nil {
-		t.Fatalf("second notify: %v", err)
-	}
-	select {
-	case sequence := <-delivered:
-		t.Fatalf("notification %d overtook the blocked first notification", sequence)
-	case <-time.After(25 * time.Millisecond):
-	}
-	close(releaseFirst)
-	for want := 1; want <= 2; want++ {
-		select {
-		case got := <-delivered:
-			if got != want {
-				t.Fatalf("notification order = ...,%d; want %d", got, want)
-			}
-		case <-time.After(2 * time.Second):
-			t.Fatalf("notification %d was not delivered", want)
-		}
-	}
-}
-
-func TestConnDifferentNotificationMethodsStayConcurrent(t *testing.T) {
-	a, b, stop := connPair(t)
-	defer stop()
-
-	updateStarted := make(chan struct{})
-	releaseUpdate := make(chan struct{})
-	cancelDelivered := make(chan struct{})
-	b.HandleNotify("update", func(context.Context, json.RawMessage) {
-		close(updateStarted)
-		<-releaseUpdate
-	})
-	b.HandleNotify("cancel", func(context.Context, json.RawMessage) {
-		close(cancelDelivered)
-	})
-
-	if err := a.Notify("update", nil); err != nil {
-		t.Fatalf("update notify: %v", err)
-	}
-	select {
-	case <-updateStarted:
-	case <-time.After(2 * time.Second):
-		t.Fatal("update notification did not start")
-	}
-	if err := a.Notify("cancel", nil); err != nil {
-		t.Fatalf("cancel notify: %v", err)
-	}
-	select {
-	case <-cancelDelivered:
-	case <-time.After(2 * time.Second):
-		t.Fatal("different notification method was blocked behind update")
-	}
-	close(releaseUpdate)
-}
-
-func TestConnMethodNotFound(t *testing.T) {
-	a, _, stop := connPair(t)
-	defer stop()
-
-	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
-	defer cancel()
-	err := a.Call(ctx, "does_not_exist", nil, nil)
-	var re *rpcError
-	if !asRPCError(err, &re) {
-		t.Fatalf("expected rpcError, got %v", err)
-	}
-	if re.Code != codeMethodNotFound {
-		t.Fatalf("code = %d, want %d", re.Code, codeMethodNotFound)
-	}
-}
-
-func TestConnHandlerError(t *testing.T) {
-	a, b, stop := connPair(t)
-	defer stop()
-	b.Handle("boom", func(_ context.Context, _ json.RawMessage) (any, error) {
-		return nil, RPCError(codeInvalidParams, "nope")
-	})
-	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
-	defer cancel()
-	err := a.Call(ctx, "boom", nil, nil)
-	var re *rpcError
-	if !asRPCError(err, &re) || re.Code != codeInvalidParams {
-		t.Fatalf("expected invalid-params rpcError, got %v", err)
-	}
-}
-
-// TestConnBidirectionalDuringHandler proves that while one peer is inside a
-// request handler it can issue an outbound request back to the caller and the
-// caller answers it — exactly the session/prompt -> session/request_permission
-// pattern. If the read loop blocked on the handler, this would deadlock.
-func TestConnBidirectionalDuringHandler(t *testing.T) {
-	a, b, stop := connPair(t)
-	defer stop()
-
-	// a answers an "approve?" callback.
-	a.Handle("approve", func(_ context.Context, _ json.RawMessage) (any, error) {
-		return map[string]bool{"ok": true}, nil
-	})
-
-	// b's "run" handler calls back to a mid-flight.
-	b.Handle("run", func(ctx context.Context, _ json.RawMessage) (any, error) {
-		var approval struct{ OK bool }
-		if err := b.Call(ctx, "approve", nil, &approval); err != nil {
-			return nil, err
-		}
-		return map[string]bool{"ran": approval.OK}, nil
-	})
-
-	var out struct{ Ran bool }
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
-	defer cancel()
-	if err := a.Call(ctx, "run", nil, &out); err != nil {
-		t.Fatalf("run: %v", err)
-	}
-	if !out.Ran {
-		t.Fatal("expected ran=true via mid-handler callback")
-	}
-}
-
-// TestConnSurvivesMalformedLine proves a single bad ndjson line yields a -32700
-// and does NOT tear down the connection — a following valid request still works.
-func TestConnSurvivesMalformedLine(t *testing.T) {
-	clientR, serverW := io.Pipe() // server -> client
-	serverR, clientW := io.Pipe() // client -> server
-	server := NewConn(serverR, serverW)
-	server.Handle("ping", func(_ context.Context, _ json.RawMessage) (any, error) { return "pong", nil })
-	ctx, cancel := context.WithCancel(context.Background())
-	defer func() {
-		cancel()
-		_ = serverW.Close()
-		_ = clientW.Close()
-	}()
-	go func() { _ = server.Serve(ctx) }()
-
-	go func() {
-		_, _ = clientW.Write([]byte("this is not json\n"))
-		_, _ = clientW.Write([]byte(`{"jsonrpc":"2.0","id":1,"method":"ping"}` + "\n"))
-	}()
-
-	dec := json.NewDecoder(clientR)
-	var sawParseError, sawPong bool
-	for i := 0; i < 2; i++ {
-		var msg struct {
-			Result any `json:"result"`
-			Error  *struct {
-				Code int `json:"code"`
-			} `json:"error"`
-		}
-		done := make(chan error, 1)
-		go func() { done <- dec.Decode(&msg) }()
-		select {
-		case err := <-done:
-			if err != nil {
-				t.Fatalf("decode response %d: %v", i, err)
-			}
-		case <-time.After(3 * time.Second):
-			t.Fatal("timed out waiting for a response")
-		}
-		if msg.Error != nil && msg.Error.Code == codeParseError {
-			sawParseError = true
-		}
-		if r, ok := msg.Result.(string); ok && r == "pong" {
-			sawPong = true
-		}
-	}
-	if !sawParseError {
-		t.Error("expected a -32700 parse error for the malformed line")
-	}
-	if !sawPong {
-		t.Error("expected the valid request to still be answered (connection survived the bad line)")
-	}
-}
-
-func asRPCError(err error, target **rpcError) bool {
-	re, ok := err.(*rpcError)
-	if ok {
-		*target = re
-	}
-	return ok
-}

internal/acp/mode_persistence_test.go

@@ -1,213 +0,0 @@
-package acp
-
-import (
-	"context"
-	"errors"
-	"os"
-	"path/filepath"
-	"testing"
-	"time"
-
-	"github.com/Gitlawb/zero/internal/agent"
-	"github.com/Gitlawb/zero/internal/sessions"
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-// captureAgentOptions makes every turn record the agent.Options it was built
-// with, so a test can assert the permission mode the next prompt actually runs
-// with rather than only what the wire reports.
-func captureAgentOptions(deps *Deps) *agent.Options {
-	var captured agent.Options
-	deps.RunAgent = func(_ context.Context, _ string, _ zeroruntime.Provider, opts agent.Options) (agent.Result, error) {
-		captured = opts
-		return agent.Result{FinalAnswer: "ok"}, nil
-	}
-	return &captured
-}
-
-func newHarnessT(t *testing.T, deps Deps) *clientHarness {
-	t.Helper()
-	h := newHarness(t, deps)
-	t.Cleanup(h.stop)
-	return h
-}
-
-func mustCall(t *testing.T, ctx context.Context, h *clientHarness, method string, params any, result any) {
-	t.Helper()
-	if err := h.client.Call(ctx, method, params, result); err != nil {
-		t.Fatalf("%s: %v", method, err)
-	}
-}
-
-// restartHarness replaces the live agent with a fresh one over the same store,
-// which is the process restart the persisted mode has to survive.
-func restartHarness(t *testing.T, h *clientHarness, deps Deps) *clientHarness {
-	t.Helper()
-	h.stop()
-	return newHarnessT(t, deps)
-}
-
-func modeOptionValue(t *testing.T, options []SessionConfigOption) string {
-	t.Helper()
-	for _, option := range options {
-		if option.ID == configIDMode {
-			return option.CurrentValue
-		}
-	}
-	t.Fatalf("no mode config option in %+v", options)
-	return ""
-}
-
-func assertModeReported(t *testing.T, result LoadSessionResult, want agent.PermissionMode) {
-	t.Helper()
-	if result.Modes == nil || result.Modes.CurrentModeID != string(want) {
-		t.Fatalf("modes = %+v, want currentModeId %q", result.Modes, want)
-	}
-	if got := modeOptionValue(t, result.ConfigOptions); got != string(want) {
-		t.Fatalf("mode config option = %q, want %q", got, want)
-	}
-}
-
-func TestACPModePersistsAcrossRestartLoadAndResume(t *testing.T) {
-	deps := testDeps(t)
-	captured := captureAgentOptions(&deps)
-	h := newHarnessT(t, deps)
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-	defer cancel()
-
-	workspace := t.TempDir()
-	var created NewSessionResult
-	mustCall(t, ctx, h, MethodSessionNew, NewSessionParams{Cwd: workspace, McpServers: []McpServer{}}, &created)
-
-	mustCall(t, ctx, h, MethodSessionSetMode, SetSessionModeParams{SessionID: created.SessionID, ModeID: string(agent.PermissionModePlan)}, &SetSessionModeResult{})
-	meta, err := deps.Store.Get(created.SessionID)
-	if err != nil || meta == nil {
-		t.Fatalf("store.Get: %v", err)
-	}
-	if meta.PermissionMode != string(agent.PermissionModePlan) {
-		t.Fatalf("stored mode = %q, want plan", meta.PermissionMode)
-	}
-
-	// LOAD after a restart: the response must report the stored mode, and the
-	// next prompt must actually run with it.
-	h = restartHarness(t, h, deps)
-	var loaded LoadSessionResult
-	mustCall(t, ctx, h, MethodSessionLoad, LoadSessionParams{SessionID: created.SessionID, Cwd: workspace, McpServers: []McpServer{}}, &loaded)
-	assertModeReported(t, loaded, agent.PermissionModePlan)
-	mustCall(t, ctx, h, MethodSessionPrompt, PromptParams{SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock("continue")}}, &PromptResult{})
-	if captured.PermissionMode != agent.PermissionModePlan {
-		t.Fatalf("after load, agent.Options.PermissionMode = %q, want plan", captured.PermissionMode)
-	}
-
-	// RESUME after another restart reports the same.
-	h = restartHarness(t, h, deps)
-	var resumed ResumeSessionResult
-	mustCall(t, ctx, h, MethodSessionResume, ResumeSessionParams{SessionID: created.SessionID, Cwd: workspace, McpServers: []McpServer{}}, &resumed)
-	assertModeReported(t, resumed, agent.PermissionModePlan)
-}
-
-func TestACPModePersistsViaSetConfigOption(t *testing.T) {
-	deps := testDeps(t)
-	h := newHarnessT(t, deps)
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-	defer cancel()
-
-	workspace := t.TempDir()
-	var created NewSessionResult
-	mustCall(t, ctx, h, MethodSessionNew, NewSessionParams{Cwd: workspace, McpServers: []McpServer{}}, &created)
-
-	var configured SetSessionConfigOptionResult
-	mustCall(t, ctx, h, MethodSessionSetConfigOption, SetSessionConfigOptionParams{
-		SessionID: created.SessionID, ConfigID: configIDMode, Value: string(agent.PermissionModeAsk),
-	}, &configured)
-	if got := modeOptionValue(t, configured.ConfigOptions); got != string(agent.PermissionModeAsk) {
-		t.Fatalf("configured mode = %q, want ask", got)
-	}
-	meta, err := deps.Store.Get(created.SessionID)
-	if err != nil || meta == nil {
-		t.Fatalf("store.Get: %v", err)
-	}
-	if meta.PermissionMode != string(agent.PermissionModeAsk) {
-		t.Fatalf("stored mode = %q, want ask", meta.PermissionMode)
-	}
-
-	h = restartHarness(t, h, deps)
-	var loaded LoadSessionResult
-	mustCall(t, ctx, h, MethodSessionLoad, LoadSessionParams{SessionID: created.SessionID, Cwd: workspace, McpServers: []McpServer{}}, &loaded)
-	assertModeReported(t, loaded, agent.PermissionModeAsk)
-}
-
-// TestACPModeRestoreFallback pins the restore boundary: no stored value keeps
-// the historical auto default, and a stored value outside the three offered
-// modes must never come back weaker than ask (and never unsafe).
-func TestACPModeRestoreFallback(t *testing.T) {
-	cases := []struct {
-		name string
-		seed string // "" means metadata written before modes were persisted
-		want agent.PermissionMode
-	}{
-		{name: "unset keeps auto", want: agent.PermissionModeAuto},
-		{name: "ask preserved", seed: string(agent.PermissionModeAsk), want: agent.PermissionModeAsk},
-		{name: "unknown falls back to ask", seed: "bogus", want: agent.PermissionModeAsk},
-		{name: "unsafe never restored", seed: string(agent.PermissionModeUnsafe), want: agent.PermissionModeAsk},
-	}
-	for _, tc := range cases {
-		t.Run(tc.name, func(t *testing.T) {
-			deps := testDeps(t)
-			captured := captureAgentOptions(&deps)
-			h := newHarnessT(t, deps)
-			ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-			defer cancel()
-
-			workspace := t.TempDir()
-			var created NewSessionResult
-			mustCall(t, ctx, h, MethodSessionNew, NewSessionParams{Cwd: workspace, McpServers: []McpServer{}}, &created)
-			if tc.seed != "" {
-				if _, err := deps.Store.UpdateMode(created.SessionID, tc.seed); err != nil {
-					t.Fatalf("seed mode: %v", err)
-				}
-			}
-
-			h = restartHarness(t, h, deps)
-			var loaded LoadSessionResult
-			mustCall(t, ctx, h, MethodSessionLoad, LoadSessionParams{SessionID: created.SessionID, Cwd: workspace, McpServers: []McpServer{}}, &loaded)
-			assertModeReported(t, loaded, tc.want)
-
-			mustCall(t, ctx, h, MethodSessionPrompt, PromptParams{SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock("go")}}, &PromptResult{})
-			if captured.PermissionMode != tc.want {
-				t.Fatalf("next prompt PermissionMode = %q, want %q", captured.PermissionMode, tc.want)
-			}
-		})
-	}
-}
-
-// TestACPSetModeWriteFailureKeepsLiveMode pins the store-first order: when the
-// mode cannot be saved the request fails and the live session is untouched.
-func TestACPSetModeWriteFailureKeepsLiveMode(t *testing.T) {
-	deps := testDeps(t)
-	captured := captureAgentOptions(&deps)
-	h := newHarnessT(t, deps)
-	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
-	defer cancel()
-
-	var created NewSessionResult
-	mustCall(t, ctx, h, MethodSessionNew, NewSessionParams{Cwd: t.TempDir(), McpServers: []McpServer{}}, &created)
-
-	// Remove the metadata file so UpdateMode fails but the live session stays
-	// promptable (turn persistence only warns when the file is gone).
-	metadataPath := filepath.Join(deps.Store.RootDir, created.SessionID, sessions.MetadataFile)
-	if err := os.Remove(metadataPath); err != nil {
-		t.Fatalf("remove metadata: %v", err)
-	}
-
-	err := h.client.Call(ctx, MethodSessionSetMode, SetSessionModeParams{SessionID: created.SessionID, ModeID: string(agent.PermissionModePlan)}, &SetSessionModeResult{})
-	var rpcErr *rpcError
-	if !errors.As(err, &rpcErr) || rpcErr.Code != codeInternalError {
-		t.Fatalf("set_mode with an unsavable mode = %v, want internal error", err)
-	}
-
-	mustCall(t, ctx, h, MethodSessionPrompt, PromptParams{SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock("still auto")}}, &PromptResult{})
-	if captured.PermissionMode != agent.PermissionModeAuto {
-		t.Fatalf("failed set_mode changed the live mode: PermissionMode = %q, want auto", captured.PermissionMode)
-	}
-}

internal/acp/permission.go

@@ -1,182 +0,0 @@
-package acp
-
-import (
-	"encoding/json"
-
-	"github.com/Gitlawb/zero/internal/agent"
-)
-
-// permission.go maps ZERO's permission prompt model onto ACP's
-// session/request_permission request/option/outcome model. The option id on the
-// wire carries the ZERO decision action verbatim, so mapping the client's
-// selection back to a ZERO decision is exact and lossless.
-
-// buildPermissionOptions turns the decisions ZERO offers for a tool call into ACP
-// PermissionOptions. Only the actions ZERO actually presented (AvailableDecisions)
-// are surfaced; the optionId is the ZERO action string for a clean round-trip.
-func buildPermissionOptions(req agent.PermissionRequest) []PermissionOption {
-	actions := offeredDecisions(req)
-	options := make([]PermissionOption, 0, len(actions))
-	for _, action := range actions {
-		kind, name := optionKindFor(action, req.PrefixApprovalEscalates)
-		if kind == "" {
-			continue // skip actions that have no clean ACP option (e.g. cancel)
-		}
-		options = append(options, PermissionOption{
-			OptionID: string(action),
-			Name:     name,
-			Kind:     kind,
-		})
-	}
-	return options
-}
-
-// offeredDecisions resolves what this request actually offers the client.
-//
-// ONE RESOLVER, USED BY BOTH SIDES, and that is the entire point of it existing.
-// The fallback below used to live inside buildPermissionOptions while
-// requestPermission validated the client's answer against the raw
-// req.AvailableDecisions. When ZERO did not enumerate — which is every
-// permission event that is not a prompt, and includes a shell call whose sandbox
-// decision came back deny — the two disagreed completely: the client was sent
-// "Allow" and "Reject", and validation was performed against an EMPTY list, so
-// every option the client could possibly click failed closed to deny with
-// "permission option was not offered".
-//
-// The user clicked Allow and ZERO recorded a denial. Nothing surfaced it,
-// because a denial is a legitimate answer — the tool was simply refused and the
-// turn carried on as though the user had rejected it.
-func offeredDecisions(req agent.PermissionRequest) []agent.PermissionDecisionAction {
-	if len(req.AvailableDecisions) > 0 {
-		return req.AvailableDecisions
-	}
-	// Sensible default if ZERO didn't enumerate: allow once / reject.
-	return []agent.PermissionDecisionAction{
-		agent.PermissionDecisionAllow,
-		agent.PermissionDecisionDeny,
-	}
-}
-
-// optionKindFor maps a ZERO decision action to an ACP PermissionOptionKind and a
-// human label. Returns an empty kind for actions that ACP expresses through the
-// outcome rather than an option (cancel).
-//
-// escalates reports that approving a command prefix will also run the command
-// outside the sandbox. The two prefix options say so in their label, since the
-// label is all an ACP client shows and the option id carries no room for it. An
-// editor user is deciding on exactly the same terms as a terminal user, so the
-// disclosure cannot be TUI-only.
-func optionKindFor(action agent.PermissionDecisionAction, escalates bool) (kind, name string) {
-	switch action {
-	case agent.PermissionDecisionAllow:
-		return PermAllowOnce, "Allow"
-	case agent.PermissionDecisionAllowStrict:
-		// SPLIT FROM PLAIN ALLOW because the label is the only thing an ACP
-		// client shows. Both were labelled "Allow", and request_permissions
-		// offers them together — so the panel presented two identical buttons,
-		// and whichever the user picked looked the same while one of them
-		// silently turned on strict auto-review of what was granted. The option
-		// id carries no room for the distinction, so it has to be in the name.
-		return PermAllowOnce, "Allow with strict review"
-	case agent.PermissionDecisionAllowForSession:
-		return PermAllowAlways, "Allow for this session"
-	case agent.PermissionDecisionAllowPrefix:
-		return PermAllowAlways, withSandboxEscalationNote("Allow this command for the session", escalates)
-	case agent.PermissionDecisionAlwaysAllow:
-		return PermAllowAlways, "Always allow"
-	case agent.PermissionDecisionAlwaysAllowPrefix:
-		return PermAllowAlways, withSandboxEscalationNote("Always allow this command", escalates)
-	case agent.PermissionDecisionDeny:
-		return PermRejectOnce, "Reject"
-	case agent.PermissionDecisionCancel:
-		return "", "" // expressed as outcome=cancelled, not an option
-	default:
-		return "", ""
-	}
-}
-
-// decisionFromOutcome maps the client's permission outcome back to a ZERO
-// decision. A cancelled outcome cancels the run; a selected option id is the ZERO
-// action verbatim (validated against what was actually sent); anything
-// unrecognized fails closed to deny.
-//
-// IT TAKES THE OPTIONS THAT WERE SENT, not the decisions the request offered,
-// and the two are not the same list. Some actions never become options —
-// PermissionDecisionCancel is dropped by optionKindFor because ACP expresses
-// cancellation through the outcome instead — yet it IS enumerated in
-// AvailableDecisions for shell commands and apply_patch, the two commonest
-// prompts. Validating against the decisions therefore accepted
-// {"outcome":"selected","optionId":"cancel"}: an identifier no client was ever
-// shown, aborting the whole turn.
-//
-// Passing the sent options makes "what we offered" and "what we accept" the
-// same slice rather than two things kept in step, so anything optionKindFor
-// declines to render is excluded structurally instead of by name.
-func decisionFromOutcome(outcome RequestPermissionOutcome, offered []PermissionOption) agent.PermissionDecision {
-	switch outcome.Outcome {
-	case OutcomeCancelled:
-		return agent.PermissionDecision{Action: agent.PermissionDecisionCancel, Reason: "client cancelled"}
-	case OutcomeSelected:
-		// Bind to what was actually offered for THIS call: a client must not be able
-		// to return a broader grant (always_allow / allow_for_session) that wasn't
-		// presented. Anything not offered fails closed to deny.
-		if actionOffered(outcome.OptionID, offered) {
-			return agent.PermissionDecision{Action: agent.PermissionDecisionAction(outcome.OptionID)}
-		}
-		return agent.PermissionDecision{Action: agent.PermissionDecisionDeny, Reason: "permission option was not offered"}
-	default:
-		return agent.PermissionDecision{Action: agent.PermissionDecisionDeny, Reason: "no permission outcome"}
-	}
-}
-
-func actionOffered(optionID string, offered []PermissionOption) bool {
-	for _, option := range offered {
-		if option.OptionID == optionID {
-			return true
-		}
-	}
-	return false
-}
-
-// permissionToolCall builds the ToolCall descriptor embedded in a
-// session/request_permission request from a ZERO permission request.
-func permissionToolCall(req agent.PermissionRequest) ToolCallUpdate {
-	args := marshalArgs(req.Args)
-	upd := ToolCallUpdate{
-		ToolCallID: req.ToolCallID,
-		Title:      toolTitle(req.ToolName, string(args)),
-		Kind:       toolKindFor(req.ToolName),
-		Status:     ToolStatusPending,
-		RawInput:   rawInputBytes(args),
-	}
-	attachBrowserToolDetails(&upd, req.ToolName)
-	return upd
-}
-
-func marshalArgs(args map[string]any) []byte {
-	if len(args) == 0 {
-		return nil
-	}
-	data, err := json.Marshal(args)
-	if err != nil {
-		return nil
-	}
-	return data
-}
-
-func rawInputBytes(data []byte) json.RawMessage {
-	if len(data) == 0 || !json.Valid(data) {
-		return nil
-	}
-	return json.RawMessage(data)
-}
-
-// withSandboxEscalationNote appends the escalation disclosure to a prefix
-// option's label. Kept parallel to the TUI's wording so the same consequence is
-// not described two different ways depending on which client the user runs.
-func withSandboxEscalationNote(name string, escalates bool) string {
-	if !escalates {
-		return name
-	}
-	return name + " (runs outside the sandbox)"
-}

internal/acp/permission_escalation_test.go

@@ -1,69 +0,0 @@
-package acp
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/agent"
-)
-
-func escalationRequest(escalates bool) agent.PermissionRequest {
-	return agent.PermissionRequest{
-		ToolName: "bash",
-		AvailableDecisions: []agent.PermissionDecisionAction{
-			agent.PermissionDecisionAllow,
-			agent.PermissionDecisionAllowPrefix,
-			agent.PermissionDecisionAlwaysAllowPrefix,
-			agent.PermissionDecisionDeny,
-		},
-		PrefixApprovalEscalates: escalates,
-	}
-}
-
-// An ACP client renders only Name, so if the escalation is not in the label the
-// editor user approves it blind. They face exactly the outcome a terminal user
-// faces, so the disclosure has to reach both clients or it is not a fix.
-func TestACPPrefixOptionsDiscloseLeavingTheSandbox(t *testing.T) {
-	found := 0
-	for _, option := range buildPermissionOptions(escalationRequest(true)) {
-		action := agent.PermissionDecisionAction(option.OptionID)
-		if action != agent.PermissionDecisionAllowPrefix && action != agent.PermissionDecisionAlwaysAllowPrefix {
-			if strings.Contains(option.Name, "sandbox") {
-				t.Errorf("option %q carries the disclosure but does not escalate", option.Name)
-			}
-			continue
-		}
-		found++
-		if !strings.Contains(option.Name, "outside the sandbox") {
-			t.Errorf("prefix option %q does not say the command leaves the sandbox", option.Name)
-		}
-	}
-	if found != 2 {
-		t.Fatalf("expected both prefix options, saw %d", found)
-	}
-}
-
-func TestACPPrefixOptionsStaySilentWithoutEscalation(t *testing.T) {
-	for _, option := range buildPermissionOptions(escalationRequest(false)) {
-		if strings.Contains(option.Name, "sandbox") {
-			t.Errorf("option %q warns about the sandbox when approving would not leave it", option.Name)
-		}
-	}
-}
-
-// The disclosure must live in the label only. The option id is the decision
-// action round-tripped verbatim, and decisionFromOutcome matches it against
-// what was offered, so decorating it would fail every prefix approval closed.
-func TestACPDisclosureDoesNotDisturbTheOptionIDRoundTrip(t *testing.T) {
-	request := escalationRequest(true)
-	options := buildPermissionOptions(request)
-	for _, option := range options {
-		decision := decisionFromOutcome(
-			RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: option.OptionID},
-			options,
-		)
-		if string(decision.Action) != option.OptionID {
-			t.Errorf("option id %q round-tripped to %q (%s)", option.OptionID, decision.Action, decision.Reason)
-		}
-	}
-}

internal/acp/permission_test.go

@@ -1,98 +0,0 @@
-package acp
-
-import (
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/agent"
-)
-
-func TestBuildPermissionOptions(t *testing.T) {
-	req := agent.PermissionRequest{
-		ToolCallID: "tc1",
-		ToolName:   "bash",
-		AvailableDecisions: []agent.PermissionDecisionAction{
-			agent.PermissionDecisionAllow,
-			agent.PermissionDecisionAllowForSession,
-			agent.PermissionDecisionAlwaysAllow,
-			agent.PermissionDecisionDeny,
-			agent.PermissionDecisionCancel, // must be dropped (expressed as outcome)
-		},
-	}
-	opts := buildPermissionOptions(req)
-	if len(opts) != 4 {
-		t.Fatalf("expected 4 options (cancel dropped), got %d: %+v", len(opts), opts)
-	}
-	// optionId must carry the ZERO action verbatim for a clean round trip.
-	if opts[0].OptionID != string(agent.PermissionDecisionAllow) || opts[0].Kind != PermAllowOnce {
-		t.Errorf("allow option = %+v", opts[0])
-	}
-	if opts[1].Kind != PermAllowAlways || opts[3].Kind != PermRejectOnce {
-		t.Errorf("kinds = %q, %q", opts[1].Kind, opts[3].Kind)
-	}
-}
-
-func TestBuildPermissionOptionsDefault(t *testing.T) {
-	opts := buildPermissionOptions(agent.PermissionRequest{ToolName: "x"})
-	if len(opts) != 2 {
-		t.Fatalf("expected default allow+deny, got %d", len(opts))
-	}
-}
-
-func TestDecisionFromOutcome(t *testing.T) {
-	offered := buildPermissionOptions(agent.PermissionRequest{
-		ToolName: "bash",
-		AvailableDecisions: []agent.PermissionDecisionAction{
-			agent.PermissionDecisionAllow,
-			agent.PermissionDecisionAlwaysAllow,
-			agent.PermissionDecisionDeny,
-		},
-	})
-	if d := decisionFromOutcome(RequestPermissionOutcome{Outcome: OutcomeCancelled}, offered); d.Action != agent.PermissionDecisionCancel {
-		t.Errorf("cancelled -> %q, want cancel", d.Action)
-	}
-	if d := decisionFromOutcome(RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: "allow"}, offered); d.Action != agent.PermissionDecisionAllow {
-		t.Errorf("selected allow -> %q", d.Action)
-	}
-	if d := decisionFromOutcome(RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: "always_allow"}, offered); d.Action != agent.PermissionDecisionAlwaysAllow {
-		t.Errorf("selected always_allow -> %q", d.Action)
-	}
-	// Unknown option fails closed to deny.
-	if d := decisionFromOutcome(RequestPermissionOutcome{Outcome: OutcomeSelected, OptionID: "bogus"}, offered); d.Action != agent.PermissionDecisionDeny {
-		t.Errorf("unknown option -> %q, want deny", d.Action)
-	}
-	// Missing/empty outcome fails closed to deny.
-	if d := decisionFromOutcome(RequestPermissionOutcome{}, offered); d.Action != agent.PermissionDecisionDeny {
-		t.Errorf("empty outcome -> %q, want deny", d.Action)
-	}
-}
-
-func TestPermissionToolCall(t *testing.T) {
-	tc := permissionToolCall(agent.PermissionRequest{
-		ToolCallID: "tc9",
-		ToolName:   "read_file",
-		Args:       map[string]any{"path": "a.go"},
-	})
-	if tc.ToolCallID != "tc9" || tc.Kind != ToolKindRead || tc.Status != ToolStatusPending {
-		t.Fatalf("unexpected toolCall: %+v", tc)
-	}
-	if tc.Title != "read_file a.go" {
-		t.Errorf("title = %q", tc.Title)
-	}
-	if len(tc.RawInput) == 0 {
-		t.Error("expected rawInput from args")
-	}
-}
-
-func TestPermissionToolCallKeepsTheBrowserDescriptor(t *testing.T) {
-	call := permissionToolCall(agent.PermissionRequest{
-		ToolCallID: "browser-1",
-		ToolName:   "browser_connect",
-		Args:       map[string]any{"target": "127.0.0.1:9222"},
-	})
-	if got := browserDescriptor(t, call); got != (BrowserToolDetails{Version: 1, Command: "connect"}) {
-		t.Fatalf("browser descriptor = %#v", got)
-	}
-	if call.Title != "browser connect" {
-		t.Fatalf("title = %q", call.Title)
-	}
-}

internal/acp/translate.go

@@ -1,379 +0,0 @@
-package acp
-
-import (
-	"encoding/json"
-	"net/url"
-	"path/filepath"
-	"strings"
-	"unicode"
-	"unicode/utf8"
-
-	"github.com/Gitlawb/zero/internal/agent"
-	"github.com/Gitlawb/zero/internal/tools"
-)
-
-// translate.go maps ZERO's agent events onto ACP session/update payloads. The
-// mapping functions are pure (no I/O) so they can be unit-tested directly; the
-// notifier wires them to a live JSON-RPC connection.
-
-func agentMessageChunk(delta string) ContentChunk {
-	return ContentChunk{SessionUpdate: UpdateAgentMessageChunk, Content: TextBlock(delta)}
-}
-
-func replayMessageChunk(role, messageID, text string) ContentChunk {
-	update := UpdateAgentMessageChunk
-	if role == "user" {
-		update = UpdateUserMessageChunk
-	}
-	return ContentChunk{SessionUpdate: update, MessageID: messageID, Content: TextBlock(text)}
-}
-
-func agentThoughtChunk(delta string) ContentChunk {
-	return ContentChunk{SessionUpdate: UpdateAgentThoughtChunk, Content: TextBlock(delta)}
-}
-
-// toolKindFor maps a ZERO tool name to the closest ACP ToolKind so editors can
-// pick an icon/affordance. Unknown tools fall back to "other".
-func toolKindFor(name string) string {
-	switch name {
-	case "read_file", "read_minified_file", "list_directory":
-		return ToolKindRead
-	case "glob", "grep":
-		return ToolKindSearch
-	case "write_file", "edit_file", "apply_patch":
-		return ToolKindEdit
-	case "bash", "exec_command", "write_stdin":
-		return ToolKindExecute
-	case "web_fetch", "web_search":
-		return ToolKindFetch
-	case "update_plan":
-		return ToolKindThink
-	default:
-		return ToolKindOther
-	}
-}
-
-// toolTitle builds a concise human title, e.g. "read_file src/main.go".
-func toolTitle(name, rawArgs string) string {
-	if browser, ok := browserToolDetails(name); ok {
-		return browserToolTitle(browser.Command, rawArgs)
-	}
-	if hint := primaryArgHint(rawArgs); hint != "" {
-		return name + " " + hint
-	}
-	return name
-}
-
-// browserToolDetails identifies ZERO's local browser helpers without treating
-// similarly named MCP tools as browser automation. The descriptor intentionally
-// contains no request data: ACP tool input is already protocol-visible, but a
-// durable UI must not need to retain text, local CDP targets, or full URLs just
-// to recognise the browser operation.
-func browserToolDetails(name string) (*BrowserToolDetails, bool) {
-	const prefix = "browser_"
-	command, ok := strings.CutPrefix(name, prefix)
-	if !ok {
-		return nil, false
-	}
-	switch command {
-	case "install", "launch", "connect", "open", "snapshot", "click", "type", "press", "action":
-		return &BrowserToolDetails{Version: 1, Command: command}, true
-	default:
-		return nil, false
-	}
-}
-
-const zeroBrowserMetaKey = "github.com/Gitlawb/zero/browser"
-
-// attachBrowserToolDetails stores ZERO's browser descriptor in ACP's reserved
-// extension channel. Keeping this in one helper prevents start, result, and
-// permission payloads from drifting onto different wire shapes.
-func attachBrowserToolDetails(update *ToolCallUpdate, name string) {
-	browser, ok := browserToolDetails(name)
-	if !ok {
-		return
-	}
-	raw, err := json.Marshal(browser)
-	if err != nil {
-		return
-	}
-	update.Meta = map[string]json.RawMessage{zeroBrowserMetaKey: raw}
-}
-
-// browserToolTitle avoids putting browser_type text, an attached DevTools
-// endpoint, or a URL query/fragment in a tool-card title. Those values can
-// carry credentials or session data; the UI only needs the operation and, for
-// navigation, a human-recognisable origin.
-func browserToolTitle(command, rawArgs string) string {
-	switch command {
-	case "action":
-		action, ok := exactJSONStringArg(rawArgs, "command")
-		if !ok {
-			return "browser action"
-		}
-		if action, ok := tools.NormalizedBrowserActionCommand(action); ok {
-			return "browser action " + action
-		}
-		return "browser action"
-	case "open":
-		rawURL, ok := exactJSONStringArg(rawArgs, "url")
-		if !ok {
-			return "browser open"
-		}
-		normalized, err := tools.NormalizeBrowserOpenURL(rawURL)
-		if err != nil {
-			return "browser open"
-		}
-		u, err := url.Parse(normalized)
-		if err != nil || u.Scheme == "" || u.Host == "" {
-			return "browser open"
-		}
-		origin := u.Scheme + "://" + u.Host
-		if !browserTitleTextSafe(origin) {
-			return "browser open"
-		}
-		return "browser open " + truncateHint(origin)
-	default:
-		return "browser " + command
-	}
-}
-
-// browserTitleTextSafe validates text after URL parsing has decoded escaped
-// UTF-8 in the host. Valid UTF-8 alone is not presentation-safe: whitespace, control,
-// format/bidi, and line/paragraph separator runes can reorder or split the
-// permission label shown to a user. The execution URL remains unchanged.
-func browserTitleTextSafe(text string) bool {
-	if !utf8.ValidString(text) {
-		return false
-	}
-	for _, r := range text {
-		if unicode.IsSpace(r) || unicode.IsControl(r) || unicode.Is(unicode.Cf, r) || unicode.Is(unicode.Zl, r) || unicode.Is(unicode.Zp, r) {
-			return false
-		}
-	}
-	return true
-}
-
-// exactJSONStringArg mirrors ZERO's map-based tool argument decoding: only the
-// exact JSON key is considered, and a non-string value is invalid. In
-// particular, an incidental "URL" key must not change a permission title when
-// browser_open will only read "url".
-func exactJSONStringArg(rawArgs, key string) (string, bool) {
-	var args map[string]json.RawMessage
-	if json.Unmarshal([]byte(rawArgs), &args) != nil {
-		return "", false
-	}
-	raw, ok := args[key]
-	if !ok {
-		return "", false
-	}
-	var value string
-	if json.Unmarshal(raw, &value) != nil {
-		return "", false
-	}
-	return value, true
-}
-
-// primaryArgHint extracts the most relevant argument (path/pattern/command) from
-// raw JSON arguments. Best-effort; returns "" when it can't parse.
-func primaryArgHint(rawArgs string) string {
-	if strings.TrimSpace(rawArgs) == "" {
-		return ""
-	}
-	var m map[string]any
-	if err := json.Unmarshal([]byte(rawArgs), &m); err != nil {
-		return ""
-	}
-	for _, key := range []string{"path", "file_path", "pattern", "query", "command", "url", "cwd"} {
-		if v, ok := m[key].(string); ok && strings.TrimSpace(v) != "" {
-			return truncateHint(v)
-		}
-	}
-	return ""
-}
-
-func truncateHint(s string) string {
-	s = strings.TrimSpace(s)
-	const max = 60
-	if utf8.RuneCountInString(s) > max {
-		return string([]rune(s)[:max]) + "…"
-	}
-	return s
-}
-
-// rawInput returns the tool arguments as a raw JSON object when they parse, else
-// nil (so a malformed/empty arg string never produces invalid JSON on the wire).
-func rawInput(args string) json.RawMessage {
-	if strings.TrimSpace(args) == "" || !json.Valid([]byte(args)) {
-		return nil
-	}
-	return json.RawMessage(args)
-}
-
-// toolCallStart maps an advertised ZERO tool call to the initial ACP "tool_call"
-// update (status in_progress — ZERO executes immediately after advertising).
-func toolCallStart(call agent.ToolCall) ToolCallUpdate {
-	upd := ToolCallUpdate{
-		SessionUpdate: UpdateToolCall,
-		ToolCallID:    call.ID,
-		Title:         toolTitle(call.Name, call.Arguments),
-		Kind:          toolKindFor(call.Name),
-		Status:        ToolStatusInProgress,
-		RawInput:      rawInput(call.Arguments),
-	}
-	attachBrowserToolDetails(&upd, call.Name)
-	return upd
-}
-
-// toolCallResult maps a finished ZERO tool result to a "tool_call_update".
-func toolCallResult(result agent.ToolResult) ToolCallUpdate {
-	status := ToolStatusCompleted
-	if result.Status == tools.StatusError {
-		status = ToolStatusFailed
-	}
-	upd := ToolCallUpdate{
-		SessionUpdate: UpdateToolCallUpdate,
-		ToolCallID:    result.ToolCallID,
-		Status:        status,
-	}
-	if content := toolResultContent(result); len(content) > 0 {
-		upd.Content = content
-	}
-	if locs := toolResultLocations(result); len(locs) > 0 {
-		upd.Locations = locs
-	}
-	attachBrowserToolDetails(&upd, result.Name)
-	return upd
-}
-
-func toolResultContent(result agent.ToolResult) []ToolCallContent {
-	content := make([]ToolCallContent, 0, 1+len(result.FileDiffs))
-	text := strings.TrimRight(result.Output, "\n")
-	if text == "" {
-		text = result.Display.Summary
-	}
-	if text == "" {
-		return appendToolResultDiffs(content, result.FileDiffs)
-	}
-	content = append(content, ToolContent(TextBlock(text)))
-	return appendToolResultDiffs(content, result.FileDiffs)
-}
-
-func appendToolResultDiffs(content []ToolCallContent, diffs []tools.FileDiff) []ToolCallContent {
-	for _, diff := range diffs {
-		if !filepath.IsAbs(diff.Path) || (!diff.OldExists && !diff.NewExists) {
-			continue
-		}
-		var oldText *string
-		if diff.OldExists {
-			old := diff.OldText
-			oldText = &old
-		}
-		var newText *string
-		if diff.NewExists {
-			updated := diff.NewText
-			newText = &updated
-		}
-		content = append(content, ToolCallContent{Type: "diff", Path: diff.Path, OldText: oldText, NewText: newText})
-	}
-	return content
-}
-
-func toolResultLocations(result agent.ToolResult) []ToolCallLocation {
-	locs := make([]ToolCallLocation, 0, len(result.FileDiffs)+len(result.ChangedFiles))
-	seen := make(map[string]bool, len(result.FileDiffs)+len(result.ChangedFiles))
-	for _, diff := range result.FileDiffs {
-		path := diff.Path
-		if path == "" || seen[path] {
-			continue
-		}
-		seen[path] = true
-		locs = append(locs, ToolCallLocation{Path: path})
-	}
-	// FileDiff.Path is canonical absolute path data while ChangedFiles is
-	// normally workspace-relative. Without the trusted workspace root these
-	// coordinate systems cannot be correlated safely: a suffix match would let
-	// /workspace/sub/a.go consume the fallback for a distinct root a.go. The
-	// shared seen set deduplicates only identities already exactly comparable.
-	for _, f := range result.ChangedFiles {
-		if f == "" || seen[f] {
-			continue
-		}
-		seen[f] = true
-		locs = append(locs, ToolCallLocation{Path: f})
-	}
-	return locs
-}
-
-// planUpdate maps ZERO's plan items to an ACP "plan" update.
-func planUpdate(items []tools.PlanItem) PlanUpdate {
-	entries := make([]PlanEntry, 0, len(items))
-	for _, it := range items {
-		entries = append(entries, PlanEntry{
-			Content:  it.Content,
-			Priority: PlanPriorityMedium,
-			Status:   planStatusToACP(it.Status),
-		})
-	}
-	return PlanUpdate{SessionUpdate: UpdatePlan, Entries: entries}
-}
-
-// planStatusToACP maps ZERO's plan status (pending/in_progress/completed/failed)
-// to ACP's PlanEntryStatus (which has no "failed"; a failed step is terminal, so
-// it maps to completed).
-func planStatusToACP(s string) string {
-	switch s {
-	case "in_progress":
-		return PlanStatusInProgress
-	case "completed", "failed":
-		return PlanStatusCompleted
-	default:
-		return PlanStatusPending
-	}
-}
-
-// promptText concatenates the text content blocks of an inbound prompt.
-func promptText(blocks []ContentBlock) string {
-	var b strings.Builder
-	for _, blk := range blocks {
-		if blk.Type == "text" {
-			b.WriteString(blk.Text)
-		}
-	}
-	return b.String()
-}
-
-// notifier sends translated updates over a connection for one session.
-type notifier struct {
-	conn      *Conn
-	sessionID string
-}
-
-func (n *notifier) send(update any) {
-	_ = n.conn.Notify(MethodSessionUpdate, SessionNotification{SessionID: n.sessionID, Update: update})
-}
-
-func (n *notifier) text(delta string) {
-	if delta != "" {
-		n.send(agentMessageChunk(delta))
-	}
-}
-
-func (n *notifier) thought(delta string) {
-	if delta != "" {
-		n.send(agentThoughtChunk(delta))
-	}
-}
-
-func (n *notifier) toolCall(call agent.ToolCall)       { n.send(toolCallStart(call)) }
-func (n *notifier) toolResult(result agent.ToolResult) { n.send(toolCallResult(result)) }
-
-func (n *notifier) plan(items []tools.PlanItem) {
-	if len(items) > 0 {
-		n.send(planUpdate(items))
-	}
-}
-
-func (n *notifier) currentMode(modeID string) {
-	n.send(CurrentModeUpdate{SessionUpdate: UpdateCurrentMode, CurrentModeID: modeID})
-}

internal/acp/translate_test.go

@@ -1,584 +0,0 @@
-package acp
-
-import (
-	"encoding/json"
-	"path/filepath"
-	"strings"
-	"testing"
-	"unicode"
-	"unicode/utf8"
-
-	"github.com/Gitlawb/zero/internal/agent"
-	"github.com/Gitlawb/zero/internal/tools"
-)
-
-func browserDescriptor(t *testing.T, update ToolCallUpdate) BrowserToolDetails {
-	t.Helper()
-	raw, ok := update.Meta[zeroBrowserMetaKey]
-	if !ok {
-		t.Fatalf("browser metadata = %#v, want %q", update.Meta, zeroBrowserMetaKey)
-	}
-	var details BrowserToolDetails
-	if err := json.Unmarshal(raw, &details); err != nil {
-		t.Fatalf("decode browser metadata: %v", err)
-	}
-	return details
-}
-
-func TestAgentMessageAndThoughtChunks(t *testing.T) {
-	m := agentMessageChunk("hello")
-	if m.SessionUpdate != UpdateAgentMessageChunk || m.Content.Type != "text" || m.Content.Text != "hello" {
-		t.Fatalf("unexpected message chunk: %+v", m)
-	}
-	th := agentThoughtChunk("thinking")
-	if th.SessionUpdate != UpdateAgentThoughtChunk || th.Content.Text != "thinking" {
-		t.Fatalf("unexpected thought chunk: %+v", th)
-	}
-}
-
-func TestToolKindFor(t *testing.T) {
-	cases := map[string]string{
-		"read_file":      ToolKindRead,
-		"list_directory": ToolKindRead,
-		"grep":           ToolKindSearch,
-		"glob":           ToolKindSearch,
-		"edit_file":      ToolKindEdit,
-		"apply_patch":    ToolKindEdit,
-		"bash":           ToolKindExecute,
-		"exec_command":   ToolKindExecute,
-		"web_fetch":      ToolKindFetch,
-		"update_plan":    ToolKindThink,
-		"some_mcp_tool":  ToolKindOther,
-	}
-	for name, want := range cases {
-		if got := toolKindFor(name); got != want {
-			t.Errorf("toolKindFor(%q) = %q, want %q", name, got, want)
-		}
-	}
-}
-
-func TestToolTitleAndHint(t *testing.T) {
-	if got := toolTitle("read_file", `{"path":"src/main.go"}`); got != "read_file src/main.go" {
-		t.Errorf("title = %q", got)
-	}
-	if got := toolTitle("bash", `{"command":"go test ./..."}`); got != "bash go test ./..." {
-		t.Errorf("title = %q", got)
-	}
-	if got := toolTitle("mystery", `not json`); got != "mystery" {
-		t.Errorf("malformed args should yield bare name, got %q", got)
-	}
-	if got := toolTitle("noargs", ``); got != "noargs" {
-		t.Errorf("empty args should yield bare name, got %q", got)
-	}
-}
-
-func TestBrowserToolUpdatesAreStructuredAndPresentationSafe(t *testing.T) {
-	start := toolCallStart(agent.ToolCall{
-		ID:        "browser-1",
-		Name:      "browser_open",
-		Arguments: `{"url":"https://example.com/settings?token=not-for-a-title#account"}`,
-	})
-	if got := browserDescriptor(t, start); got != (BrowserToolDetails{Version: 1, Command: "open"}) {
-		t.Fatalf("browser descriptor = %#v, want open", got)
-	}
-	if start.Title != "browser open https://example.com" {
-		t.Fatalf("browser title = %q", start.Title)
-	}
-	if strings.Contains(start.Title, "token=") || strings.Contains(start.Title, "#account") {
-		t.Fatalf("browser title leaked URL-sensitive data: %q", start.Title)
-	}
-	encoded, err := json.Marshal(start)
-	if err != nil {
-		t.Fatal(err)
-	}
-	var wire struct {
-		Meta map[string]json.RawMessage `json:"_meta"`
-	}
-	if err := json.Unmarshal(encoded, &wire); err != nil {
-		t.Fatal(err)
-	}
-	if _, ok := wire.Meta[zeroBrowserMetaKey]; !ok {
-		t.Fatalf("browser wire metadata = %#v", wire.Meta)
-	}
-
-	typed := toolCallStart(agent.ToolCall{
-		ID:        "browser-2",
-		Name:      "browser_type",
-		Arguments: `{"ref":"email","text":"[email protected]"}`,
-	})
-	if got := browserDescriptor(t, typed); got.Command != "type" {
-		t.Fatalf("browser type descriptor = %#v", got)
-	}
-	if typed.Title != "browser type" || strings.Contains(typed.Title, "[email protected]") {
-		t.Fatalf("browser type title = %q", typed.Title)
-	}
-
-	action := toolCallStart(agent.ToolCall{
-		ID:        "browser-3",
-		Name:      "browser_action",
-		Arguments: `{"command":"keyboard_insert_text","args":["[email protected]"]}`,
-	})
-	if action.Title != "browser action keyboard_insert_text" {
-		t.Fatalf("browser action title = %q", action.Title)
-	}
-
-	result := toolCallResult(agent.ToolResult{
-		ToolCallID: "browser-2",
-		Name:       "browser_type",
-		Status:     tools.StatusOK,
-	})
-	if got := browserDescriptor(t, result); got.Command != "type" {
-		t.Fatalf("browser result descriptor = %#v", got)
-	}
-}
-
-func TestBrowserDescriptorSurvivesProtocolShapedRoundTrip(t *testing.T) {
-	updates := []ToolCallUpdate{
-		toolCallStart(agent.ToolCall{
-			ID:        "start",
-			Name:      "browser_open",
-			Arguments: `{"url":"https://user:[email protected]/private?token=secret#fragment"}`,
-		}),
-		toolCallResult(agent.ToolResult{
-			ToolCallID: "result",
-			Name:       "browser_type",
-			Status:     tools.StatusOK,
-		}),
-		permissionToolCall(agent.PermissionRequest{
-			ToolCallID: "permission",
-			ToolName:   "browser_connect",
-			Args:       map[string]any{"target": "127.0.0.1:9222"},
-		}),
-	}
-
-	type protocolToolCallUpdate struct {
-		SessionUpdate string                     `json:"sessionUpdate,omitempty"`
-		ToolCallID    string                     `json:"toolCallId"`
-		Title         string                     `json:"title,omitempty"`
-		Kind          string                     `json:"kind,omitempty"`
-		Status        string                     `json:"status,omitempty"`
-		RawInput      json.RawMessage            `json:"rawInput,omitempty"`
-		Content       []ToolCallContent          `json:"content,omitempty"`
-		Locations     []ToolCallLocation         `json:"locations,omitempty"`
-		Meta          map[string]json.RawMessage `json:"_meta,omitempty"`
-	}
-
-	for _, update := range updates {
-		encoded, err := json.Marshal(update)
-		if err != nil {
-			t.Fatal(err)
-		}
-		var root map[string]json.RawMessage
-		if err := json.Unmarshal(encoded, &root); err != nil {
-			t.Fatal(err)
-		}
-		if _, ok := root["browser"]; ok {
-			t.Fatalf("browser descriptor escaped ACP _meta: %s", encoded)
-		}
-
-		var protocol protocolToolCallUpdate
-		if err := json.Unmarshal(encoded, &protocol); err != nil {
-			t.Fatal(err)
-		}
-		forwarded, err := json.Marshal(protocol)
-		if err != nil {
-			t.Fatal(err)
-		}
-		var roundTripped ToolCallUpdate
-		if err := json.Unmarshal(forwarded, &roundTripped); err != nil {
-			t.Fatal(err)
-		}
-		details := browserDescriptor(t, roundTripped)
-		if details.Version != 1 || details.Command == "" {
-			t.Fatalf("round-tripped browser descriptor = %#v", details)
-		}
-		descriptorJSON := string(roundTripped.Meta[zeroBrowserMetaKey])
-		for _, secret := range []string{"password", "private", "token", "fragment", "127.0.0.1", "9222"} {
-			if strings.Contains(descriptorJSON, secret) {
-				t.Fatalf("browser descriptor leaked %q: %s", secret, descriptorJSON)
-			}
-		}
-	}
-}
-
-func TestBrowserPermissionTitlesMirrorSafeToolArguments(t *testing.T) {
-	if got := browserToolTitle("open", `{"url":"evil.example.test/pay?token=hidden#fragment"}`); got != "browser open https://evil.example.test" {
-		t.Fatalf("bare-host title = %q", got)
-	}
-	if got := browserToolTitle("open", `{"URL":"https://different.example.test"}`); got != "browser open" {
-		t.Fatalf("case-variant URL title = %q", got)
-	}
-	if got := browserToolTitle("open", `{"URL":"https://different.example.test","url":"https://actual.example.test/path"}`); got != "browser open https://actual.example.test" {
-		t.Fatalf("exact URL key title = %q", got)
-	}
-	if got := browserToolTitle("action", `{"command":"not an action"}`); got != "browser action" {
-		t.Fatalf("unknown browser action title = %q", got)
-	}
-
-	longHost := "https://" + strings.Repeat("a", 200) + ".example.test/path?token=hidden"
-	title := browserToolTitle("open", `{"url":"`+longHost+`"}`)
-	if !utf8.ValidString(title) || utf8.RuneCountInString(title) > len("browser open ")+61 || strings.Contains(title, "token=") {
-		t.Fatalf("bounded browser origin title = %q", title)
-	}
-}
-
-func TestBrowserOpenTitlesRejectDecodedUnicodePresentationControls(t *testing.T) {
-	for _, rawURL := range []string{
-		"https://safe.example%C2%A0evil.test/path",
-		"https://safe.example%E2%80%83evil.test/path",
-		"https://safe.example%E3%80%80evil.test/path",
-		"https://safe.example%E2%80%AEevil.test/path",
-		"https://safe.example%E2%81%A6evil.test/path",
-		"https://safe.example%C2%85evil.test/path",
-		"https://safe.example%E2%80%A8evil.test/path",
-		"https://safe.example%E2%80%A9evil.test/path",
-	} {
-		t.Run(rawURL, func(t *testing.T) {
-			normalized, err := tools.NormalizeBrowserOpenURL(rawURL)
-			if err != nil {
-				t.Fatalf("execution URL rejected: %v", err)
-			}
-			if normalized != rawURL {
-				t.Fatalf("execution URL = %q, want unchanged %q", normalized, rawURL)
-			}
-
-			args, err := json.Marshal(map[string]any{"url": rawURL})
-			if err != nil {
-				t.Fatal(err)
-			}
-			if title := browserToolTitle("open", string(args)); title != "browser open" {
-				t.Errorf("unsafe origin accepted before permission translation: %q", title)
-			}
-			updates := []ToolCallUpdate{
-				toolCallStart(agent.ToolCall{ID: "start", Name: "browser_open", Arguments: string(args)}),
-				permissionToolCall(agent.PermissionRequest{ToolCallID: "permission", ToolName: "browser_open", Args: map[string]any{"url": rawURL}}),
-			}
-			for _, update := range updates {
-				encoded, err := json.Marshal(update)
-				if err != nil {
-					t.Fatal(err)
-				}
-				var decoded ToolCallUpdate
-				if err := json.Unmarshal(encoded, &decoded); err != nil {
-					t.Fatal(err)
-				}
-				if decoded.Title != "browser open" {
-					t.Fatalf("unsafe browser title survived wire round trip: %q", decoded.Title)
-				}
-				for _, r := range decoded.Title {
-					if unicode.IsControl(r) || unicode.Is(unicode.Cf, r) || unicode.Is(unicode.Zl, r) || unicode.Is(unicode.Zp, r) {
-						t.Fatalf("browser title contains unsafe presentation rune %U: %q", r, decoded.Title)
-					}
-				}
-			}
-		})
-	}
-}
-
-func TestBrowserDescriptorDoesNotClaimSimilarlyNamedMCPTools(t *testing.T) {
-	start := toolCallStart(agent.ToolCall{ID: "mcp-1", Name: "browser_plugin_open", Arguments: `{}`})
-	if len(start.Meta) != 0 {
-		t.Fatalf("MCP-like tool received built-in browser metadata: %#v", start.Meta)
-	}
-	encoded, err := json.Marshal(start)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if strings.Contains(string(encoded), `"browser"`) {
-		t.Fatalf("non-browser tool encoded browser field: %s", encoded)
-	}
-}
-
-func TestToolCallStart(t *testing.T) {
-	upd := toolCallStart(agent.ToolCall{ID: "tc1", Name: "read_file", Arguments: `{"path":"a.go"}`})
-	if upd.SessionUpdate != UpdateToolCall {
-		t.Fatalf("sessionUpdate = %q", upd.SessionUpdate)
-	}
-	if upd.ToolCallID != "tc1" || upd.Status != ToolStatusInProgress || upd.Kind != ToolKindRead {
-		t.Fatalf("unexpected start: %+v", upd)
-	}
-	if string(upd.RawInput) != `{"path":"a.go"}` {
-		t.Fatalf("rawInput = %s", upd.RawInput)
-	}
-	// Malformed args must not produce invalid JSON on the wire.
-	if got := toolCallStart(agent.ToolCall{ID: "x", Name: "bash", Arguments: "broken"}); got.RawInput != nil {
-		t.Fatalf("malformed args should drop rawInput, got %s", got.RawInput)
-	}
-}
-
-func TestToolCallResult(t *testing.T) {
-	path := filepath.Join(t.TempDir(), "a.go")
-	ok := toolCallResult(agent.ToolResult{
-		ToolCallID:   "tc1",
-		Name:         "edit_file",
-		Status:       tools.StatusOK,
-		Output:       "applied\n",
-		ChangedFiles: []string{"a.go", ""},
-		FileDiffs:    []tools.FileDiff{{Path: path, OldExists: true, NewExists: true, OldText: "before\n", NewText: "after\n"}},
-	})
-	if ok.SessionUpdate != UpdateToolCallUpdate || ok.Status != ToolStatusCompleted {
-		t.Fatalf("unexpected ok result: %+v", ok)
-	}
-	if len(ok.Content) != 2 || ok.Content[0].Type != "content" || ok.Content[0].Content.Text != "applied" {
-		t.Fatalf("unexpected content: %+v", ok.Content)
-	}
-	if diff := ok.Content[1]; diff.Type != "diff" || diff.Path != path || diff.OldText == nil || *diff.OldText != "before\n" || diff.NewText == nil || *diff.NewText != "after\n" {
-		t.Fatalf("unexpected diff content: %+v", diff)
-	}
-	if len(ok.Locations) != 2 || ok.Locations[0].Path != path || ok.Locations[1].Path != "a.go" {
-		t.Fatalf("unproven absolute/relative aliases must both remain visible, got %+v", ok.Locations)
-	}
-
-	failed := toolCallResult(agent.ToolResult{ToolCallID: "tc2", Status: tools.StatusError, Output: "boom"})
-	if failed.Status != ToolStatusFailed {
-		t.Fatalf("error result should be failed, got %q", failed.Status)
-	}
-}
-
-func TestToolCallDiffJSONDistinguishesEmptyFilesAndDeletion(t *testing.T) {
-	path := filepath.Join(t.TempDir(), "empty.txt")
-	content := appendToolResultDiffs(nil, []tools.FileDiff{
-		{Path: path, OldExists: false, NewExists: true, NewText: ""},
-		{Path: path, OldExists: true, NewExists: true, OldText: "before", NewText: ""},
-		{Path: path, OldExists: true, NewExists: false, OldText: "before"},
-	})
-	if len(content) != 3 {
-		t.Fatalf("diff content = %#v", content)
-	}
-	for index, diff := range content {
-		encoded, err := json.Marshal(diff)
-		if err != nil {
-			t.Fatal(err)
-		}
-		var wire map[string]any
-		if err := json.Unmarshal(encoded, &wire); err != nil {
-			t.Fatal(err)
-		}
-		if wire["path"] != path {
-			t.Fatalf("wire diff %d = %s", index, encoded)
-		}
-		switch index {
-		case 0:
-			oldText, present := wire["oldText"]
-			if !present || oldText != nil || wire["newText"] != "" {
-				t.Fatalf("create diff = %s, want null oldText and empty newText", encoded)
-			}
-		case 1:
-			if wire["oldText"] != "before" || wire["newText"] != "" {
-				t.Fatalf("empty replacement diff = %s", encoded)
-			}
-		case 2:
-			newText, present := wire["newText"]
-			if wire["oldText"] != "before" || !present || newText != nil {
-				t.Fatalf("deletion diff = %s, want oldText and null newText", encoded)
-			}
-		}
-	}
-}
-
-func TestToolResultLocationsPreserveDistinctPathIdentities(t *testing.T) {
-	root := t.TempDir()
-	rootPath := filepath.Join(root, "a.go")
-	nestedPath := filepath.Join(root, "sub", "a.go")
-	diff := func(path string) tools.FileDiff {
-		return tools.FileDiff{Path: path, OldExists: true, NewExists: true, OldText: "before", NewText: "after"}
-	}
-	for _, tc := range []struct {
-		name  string
-		diffs []tools.FileDiff
-		want  []string
-	}{
-		{name: "both rich", diffs: []tools.FileDiff{diff(rootPath), diff(nestedPath)}, want: []string{rootPath, nestedPath, "a.go", filepath.Join("sub", "a.go")}},
-		{name: "root rich", diffs: []tools.FileDiff{diff(rootPath)}, want: []string{rootPath, "a.go", filepath.Join("sub", "a.go")}},
-		{name: "nested rich", diffs: []tools.FileDiff{diff(nestedPath)}, want: []string{nestedPath, "a.go", filepath.Join("sub", "a.go")}},
-	} {
-		t.Run(tc.name, func(t *testing.T) {
-			locations := toolResultLocations(agent.ToolResult{
-				ChangedFiles: []string{"a.go", filepath.Join("sub", "a.go")},
-				FileDiffs:    tc.diffs,
-			})
-			if len(locations) != len(tc.want) {
-				t.Fatalf("locations = %#v, want %#v", locations, tc.want)
-			}
-			for index := range tc.want {
-				if locations[index].Path != tc.want[index] {
-					t.Fatalf("locations = %#v, want %#v", locations, tc.want)
-				}
-			}
-		})
-	}
-}
-
-func TestToolCallResultPreservesWhitespaceInFilePaths(t *testing.T) {
-	relativePath := " report.txt "
-	absolutePath := filepath.Join(t.TempDir(), relativePath)
-	update := toolCallResult(agent.ToolResult{
-		ChangedFiles: []string{relativePath},
-		FileDiffs: []tools.FileDiff{{
-			Path: absolutePath, OldExists: true, NewExists: true, OldText: "before", NewText: "after",
-		}},
-	})
-	if len(update.Content) != 1 || update.Content[0].Path != absolutePath {
-		t.Fatalf("diff content path = %#v, want %q", update.Content, absolutePath)
-	}
-	if len(update.Locations) != 2 || update.Locations[0].Path != absolutePath || update.Locations[1].Path != relativePath {
-		t.Fatalf("locations = %#v, want exact paths %q and %q", update.Locations, absolutePath, relativePath)
-	}
-}
-
-func TestToolResultLocationsDeduplicateOnlyExactPaths(t *testing.T) {
-	path := filepath.Join(t.TempDir(), "a.go")
-	locations := toolResultLocations(agent.ToolResult{
-		ChangedFiles: []string{path, path},
-		FileDiffs:    []tools.FileDiff{{Path: path, OldExists: true, NewExists: true, OldText: "before", NewText: "after"}},
-	})
-	if len(locations) != 1 || locations[0].Path != path {
-		t.Fatalf("exact duplicate locations = %#v", locations)
-	}
-}
-
-func TestDeletedFileEmitsDiffAndKeepsLocations(t *testing.T) {
-	relativePath := "deleted.go"
-	absolutePath := filepath.Join(t.TempDir(), relativePath)
-	update := toolCallResult(agent.ToolResult{
-		ChangedFiles: []string{relativePath},
-		FileDiffs: []tools.FileDiff{{
-			Path: absolutePath, OldExists: true, NewExists: false, OldText: "before",
-		}},
-	})
-	if len(update.Content) != 1 || update.Content[0].OldText == nil || *update.Content[0].OldText != "before" || update.Content[0].NewText != nil {
-		t.Fatalf("deleted file diff = %#v, want oldText with null newText", update.Content)
-	}
-	if len(update.Locations) != 2 || update.Locations[0].Path != absolutePath || update.Locations[1].Path != relativePath {
-		t.Fatalf("deleted file locations = %#v", update.Locations)
-	}
-}
-
-func TestToolCallResultEmitsOnlyRedactedFileDiffs(t *testing.T) {
-	secret := "sk-proj-abcdefghijklmnopqrstuvwxyz"
-	path := filepath.Join(t.TempDir(), "secret.txt")
-	scrubbed := tools.ScrubResultSecrets(tools.Result{FileDiffs: []tools.FileDiff{{
-		Path: path, OldExists: true, NewExists: true, OldText: "token=" + secret, NewText: "safe",
-	}}})
-	update := toolCallResult(agent.ToolResult{ToolCallID: "call", Status: tools.StatusError, FileDiffs: scrubbed.FileDiffs})
-	if len(update.Content) != 1 || update.Content[0].OldText == nil || strings.Contains(*update.Content[0].OldText, secret) {
-		t.Fatalf("ACP content leaked unredacted diff: %#v", update.Content)
-	}
-}
-
-func TestToolCallResultOmitsSemanticallyUnchangedRedactedDiff(t *testing.T) {
-	oldSecret := "ghp_ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
-	newSecret := "ghp_9876543210ZYXWVUTSRQPONMLKJIHGFEDCBA"
-	scrubbed := tools.ScrubResultSecrets(tools.Result{
-		ChangedFiles: []string{"credentials.txt"},
-		FileDiffs: []tools.FileDiff{{
-			Path: filepath.Join(t.TempDir(), "credentials.txt"), OldExists: true, NewExists: true,
-			OldText: "token=" + oldSecret, NewText: "token=" + newSecret,
-		}},
-	})
-	update := toolCallResult(agent.ToolResult{
-		ToolCallID: "call", Status: tools.StatusOK,
-		ChangedFiles: scrubbed.ChangedFiles, FileDiffs: scrubbed.FileDiffs,
-	})
-	if len(update.Content) != 0 {
-		t.Fatalf("ACP emitted semantically unchanged redacted diff: %#v", update.Content)
-	}
-	if len(update.Locations) != 1 || update.Locations[0].Path != "credentials.txt" {
-		t.Fatalf("ACP path fallback = %#v", update.Locations)
-	}
-}
-
-func TestToolCallResultOmitsDefaultIgnorableSplitSecretsOnEitherSide(t *testing.T) {
-	secret := "sk-ant-api03-AAAABBBBCCCCDDDDEEEEFFFFGGGG"
-	for name, separator := range map[string]string{
-		"combining grapheme joiner": "\u034f",
-		"variation selector":        "\ufe0f",
-	} {
-		for _, side := range []string{"old", "new"} {
-			t.Run(name+" "+side, func(t *testing.T) {
-				obfuscated := secret[:20] + separator + secret[20:]
-				diff := tools.FileDiff{
-					Path: filepath.Join(t.TempDir(), "secret.txt"), OldExists: true, NewExists: true,
-					OldText: "safe old", NewText: "safe new",
-				}
-				if side == "old" {
-					diff.OldText = obfuscated
-				} else {
-					diff.NewText = obfuscated
-				}
-				scrubbed := tools.ScrubResultSecrets(tools.Result{FileDiffs: []tools.FileDiff{diff}})
-				if !scrubbed.Redacted || len(scrubbed.FileDiffs) != 0 {
-					t.Fatalf("registry boundary retained an obfuscated secret: %#v", scrubbed)
-				}
-				update := toolCallResult(agent.ToolResult{ToolCallID: "call", Status: tools.StatusOK, FileDiffs: scrubbed.FileDiffs})
-				if len(update.Content) != 0 {
-					t.Fatalf("ACP content retained an obfuscated secret: %#v", update.Content)
-				}
-			})
-		}
-	}
-}
-
-func TestPlanUpdateAndStatus(t *testing.T) {
-	upd := planUpdate([]tools.PlanItem{
-		{Content: "step a", Status: "completed"},
-		{Content: "step b", Status: "in_progress"},
-		{Content: "step c", Status: "failed"},
-		{Content: "step d", Status: "weird"},
-	})
-	if upd.SessionUpdate != UpdatePlan || len(upd.Entries) != 4 {
-		t.Fatalf("unexpected plan: %+v", upd)
-	}
-	want := []string{PlanStatusCompleted, PlanStatusInProgress, PlanStatusCompleted, PlanStatusPending}
-	for i, w := range want {
-		if upd.Entries[i].Status != w {
-			t.Errorf("entry %d status = %q, want %q", i, upd.Entries[i].Status, w)
-		}
-		if upd.Entries[i].Priority != PlanPriorityMedium {
-			t.Errorf("entry %d priority = %q", i, upd.Entries[i].Priority)
-		}
-	}
-}
-
-func TestPromptText(t *testing.T) {
-	got := promptText([]ContentBlock{
-		TextBlock("hello "),
-		ImageBlock("base64", "image/png"),
-		TextBlock("world"),
-	})
-	if got != "hello world" {
-		t.Fatalf("promptText = %q", got)
-	}
-}
-
-func TestToolTitleTruncateHintRuneSafe(t *testing.T) {
-	// A 61-character string containing multi-byte UTF-8 runes (emojis / CJK characters).
-	// We want to verify that it is truncated without cutting any runes or producing invalid UTF-8.
-	longPath := "📁/项目/非常长的路径名称/测试/🚀/emoji-and-cjk-characters-which-are-very-long-and-exceed-sixty-characters"
-
-	// Create JSON args for read_file
-	rawArgs := `{"path":"` + longPath + `"}`
-	got := toolTitle("read_file", rawArgs)
-
-	expectedPrefix := "read_file "
-	if !strings.HasPrefix(got, expectedPrefix) {
-		t.Fatalf("expected title to start with %q, got %q", expectedPrefix, got)
-	}
-
-	hint := strings.TrimPrefix(got, expectedPrefix)
-	// Hint should end with the ellipsis character
-	if !strings.HasSuffix(hint, "…") {
-		t.Fatalf("expected truncated hint to end with ellipsis, got %q", hint)
-	}
-
-	// Check that we don't have invalid UTF-8 runes
-	if !utf8.ValidString(hint) {
-		t.Fatalf("truncated hint is not a valid UTF-8 string: %q", hint)
-	}
-
-	// The rune count of the hint (excluding ellipsis) should be exactly 60
-	runes := []rune(strings.TrimSuffix(hint, "…"))
-	if len(runes) != 60 {
-		t.Fatalf("expected exactly 60 runes before ellipsis, got %d (hint: %q)", len(runes), hint)
-	}
-}

internal/acp/types.go

@@ -1,463 +0,0 @@
-package acp
-
-import "encoding/json"
-
-// ProtocolVersion is the ACP protocol version ZERO speaks. Wire compatibility is
-// negotiated during initialize; v1 is the current stable version.
-const ProtocolVersion = 1
-
-// Method names exactly as they appear on the wire (public ACP spec).
-const (
-	MethodInitialize             = "initialize"
-	MethodAuthenticate           = "authenticate"
-	MethodSessionNew             = "session/new"
-	MethodSessionLoad            = "session/load"
-	MethodSessionList            = "session/list"
-	MethodSessionResume          = "session/resume"
-	MethodSessionPrompt          = "session/prompt"
-	MethodSessionCancel          = "session/cancel" // notification
-	MethodSessionUpdate          = "session/update" // notification (agent -> client)
-	MethodSessionSetMode         = "session/set_mode"
-	MethodSessionSetConfigOption = "session/set_config_option"
-	MethodSessionRequestPerm     = "session/request_permission" // agent -> client
-	MethodFSReadTextFile         = "fs/read_text_file"          // agent -> client
-	MethodFSWriteTextFile        = "fs/write_text_file"         // agent -> client
-
-	// Vendor-prefixed ZERO extensions (clients that don't support them ignore the
-	// method and degrade cleanly, per the spec's _-prefixed convention).
-	MethodZeroSetModel = "_zero/set_model"
-)
-
-// SessionUpdate discriminator values (the "sessionUpdate" field).
-const (
-	UpdateAgentMessageChunk = "agent_message_chunk"
-	UpdateAgentThoughtChunk = "agent_thought_chunk"
-	UpdateUserMessageChunk  = "user_message_chunk"
-	UpdateToolCall          = "tool_call"
-	UpdateToolCallUpdate    = "tool_call_update"
-	UpdatePlan              = "plan"
-	UpdateAvailableCommands = "available_commands_update"
-	UpdateCurrentMode       = "current_mode_update"
-)
-
-// ---- initialize ----
-
-type Implementation struct {
-	Name    string `json:"name"`
-	Version string `json:"version,omitempty"`
-}
-
-type FileSystemCapabilities struct {
-	ReadTextFile  bool `json:"readTextFile"`
-	WriteTextFile bool `json:"writeTextFile"`
-}
-
-type ClientCapabilities struct {
-	FS       FileSystemCapabilities `json:"fs"`
-	Terminal bool                   `json:"terminal"`
-}
-
-type PromptCapabilities struct {
-	Image           bool `json:"image"`
-	Audio           bool `json:"audio"`
-	EmbeddedContext bool `json:"embeddedContext"`
-}
-
-type AgentCapabilities struct {
-	LoadSession         bool                 `json:"loadSession"`
-	PromptCapabilities  PromptCapabilities   `json:"promptCapabilities"`
-	SessionCapabilities *SessionCapabilities `json:"sessionCapabilities,omitempty"`
-}
-
-// Empty capability objects are presence flags in ACP v1. Pointers preserve
-// the wire distinction between an advertised `{}` and an omitted capability.
-type SessionCapabilities struct {
-	List   *struct{} `json:"list,omitempty"`
-	Resume *struct{} `json:"resume,omitempty"`
-}
-
-type AuthMethod struct {
-	ID          string `json:"id"`
-	Name        string `json:"name"`
-	Description string `json:"description,omitempty"`
-}
-
-type InitializeParams struct {
-	ProtocolVersion    int                `json:"protocolVersion"`
-	ClientCapabilities ClientCapabilities `json:"clientCapabilities"`
-	ClientInfo         *Implementation    `json:"clientInfo,omitempty"`
-}
-
-type InitializeResult struct {
-	ProtocolVersion   int               `json:"protocolVersion"`
-	AgentCapabilities AgentCapabilities `json:"agentCapabilities"`
-	AgentInfo         *Implementation   `json:"agentInfo,omitempty"`
-	AuthMethods       []AuthMethod      `json:"authMethods"`
-}
-
-// ---- content blocks ----
-
-// ContentBlock is the polymorphic content type. ZERO emits "text" (and "image"
-// on tool content); it parses "text", "image", and "resource"/"resource_link"
-// from inbound prompts. A single struct with omitempty fields covers both
-// directions since the field names do not collide across the variants ZERO uses.
-type ContentBlock struct {
-	Type     string          `json:"type"`
-	Text     string          `json:"text,omitempty"`
-	Data     string          `json:"data,omitempty"`     // image/audio: base64
-	MimeType string          `json:"mimeType,omitempty"` // image/audio
-	URI      string          `json:"uri,omitempty"`      // resource_link
-	Name     string          `json:"name,omitempty"`     // resource_link
-	Resource json.RawMessage `json:"resource,omitempty"` // embedded resource
-}
-
-func TextBlock(text string) ContentBlock { return ContentBlock{Type: "text", Text: text} }
-
-// ---- sessions ----
-
-// McpServer mirrors the editor-provided MCP server entry. ZERO owns its own MCP
-// configuration (BYOK), so these are accepted for spec compliance; ZERO's
-// configured servers remain authoritative.
-type McpServer struct {
-	Name    string          `json:"name"`
-	Command string          `json:"command,omitempty"`
-	Args    []string        `json:"args,omitempty"`
-	Env     json.RawMessage `json:"env,omitempty"`
-	URL     string          `json:"url,omitempty"`
-}
-
-type NewSessionParams struct {
-	Cwd        string      `json:"cwd"`
-	McpServers []McpServer `json:"mcpServers"`
-	// AdditionalDirectories is declared by the protocol and consumed nowhere in
-	// this repo yet. When it is wired up it must go through requestedWorkspace
-	// like Cwd does: these are client-supplied paths with no absoluteness rule of
-	// their own, which is the same shape as the resume-cwd hole that made
-	// {"sessionId":"known"} activate a session against this process's directory.
-	AdditionalDirectories []string `json:"additionalDirectories,omitempty"`
-}
-
-type NewSessionResult struct {
-	SessionID     string                `json:"sessionId"`
-	ConfigOptions []SessionConfigOption `json:"configOptions,omitempty"`
-	Modes         *SessionModeState     `json:"modes,omitempty"`
-}
-
-type LoadSessionParams struct {
-	SessionID             string      `json:"sessionId"`
-	Cwd                   string      `json:"cwd"`
-	McpServers            []McpServer `json:"mcpServers"`
-	AdditionalDirectories []string    `json:"additionalDirectories,omitempty"`
-}
-
-type LoadSessionResult struct {
-	ConfigOptions []SessionConfigOption `json:"configOptions,omitempty"`
-	Modes         *SessionModeState     `json:"modes,omitempty"`
-}
-
-// ListSessionsParams and the following types implement ACP v1 session/list.
-// Transcript contents stay behind session/load; this method returns metadata
-// only and leaves the optional pagination cursor opaque.
-type ListSessionsParams struct {
-	Cwd    string `json:"cwd,omitempty"`
-	Cursor string `json:"cursor,omitempty"`
-}
-
-type SessionInfoMeta struct {
-	ModelID   string `json:"modelId,omitempty"`
-	CreatedAt string `json:"createdAt,omitempty"`
-}
-
-type SessionInfo struct {
-	SessionID string           `json:"sessionId"`
-	Cwd       string           `json:"cwd"`
-	Title     string           `json:"title,omitempty"`
-	UpdatedAt string           `json:"updatedAt,omitempty"`
-	Meta      *SessionInfoMeta `json:"_meta,omitempty"`
-}
-
-type ListSessionsResult struct {
-	Sessions   []SessionInfo `json:"sessions"`
-	NextCursor string        `json:"nextCursor,omitempty"`
-}
-
-// session/resume takes session/load's wire shape, so its cwd is a plain string
-// too and an omitted one decodes exactly like an empty one. Sharing the type is
-// safe only because activatePersistedSession requires an absolute cwd from the
-// request itself — nothing downstream may supply a default for either method.
-type ResumeSessionParams = LoadSessionParams
-type ResumeSessionResult = LoadSessionResult
-
-// ---- prompt turn ----
-
-type PromptParams struct {
-	SessionID string         `json:"sessionId"`
-	Prompt    []ContentBlock `json:"prompt"`
-}
-
-// StopReason values (why a prompt turn ended).
-const (
-	StopEndTurn   = "end_turn"
-	StopMaxTokens = "max_tokens"
-	StopRefusal   = "refusal"
-	StopCancelled = "cancelled"
-)
-
-type PromptResult struct {
-	StopReason string `json:"stopReason"`
-}
-
-type CancelParams struct {
-	SessionID string `json:"sessionId"`
-}
-
-// ---- session/update notification ----
-
-type SessionNotification struct {
-	SessionID string `json:"sessionId"`
-	Update    any    `json:"update"`
-}
-
-// AgentMessageChunk / AgentThoughtChunk / UserMessageChunk all carry a single
-// ContentBlock under "content"; the variant is set via SessionUpdate.
-type ContentChunk struct {
-	SessionUpdate string       `json:"sessionUpdate"`
-	MessageID     string       `json:"messageId,omitempty"`
-	Content       ContentBlock `json:"content"`
-}
-
-// ToolKind classifies a tool call for client rendering.
-const (
-	ToolKindRead    = "read"
-	ToolKindEdit    = "edit"
-	ToolKindDelete  = "delete"
-	ToolKindMove    = "move"
-	ToolKindSearch  = "search"
-	ToolKindExecute = "execute"
-	ToolKindThink   = "think"
-	ToolKindFetch   = "fetch"
-	ToolKindOther   = "other"
-)
-
-// ToolCallStatus values.
-const (
-	ToolStatusPending    = "pending"
-	ToolStatusInProgress = "in_progress"
-	ToolStatusCompleted  = "completed"
-	ToolStatusFailed     = "failed"
-)
-
-// ToolCallUpdate is used for both the initial "tool_call" and subsequent
-// "tool_call_update" notifications (distinguished by SessionUpdate). It also
-// appears inside session/request_permission.
-type ToolCallUpdate struct {
-	SessionUpdate string             `json:"sessionUpdate,omitempty"`
-	ToolCallID    string             `json:"toolCallId"`
-	Title         string             `json:"title,omitempty"`
-	Kind          string             `json:"kind,omitempty"`
-	Status        string             `json:"status,omitempty"`
-	RawInput      json.RawMessage    `json:"rawInput,omitempty"`
-	Content       []ToolCallContent  `json:"content,omitempty"`
-	Locations     []ToolCallLocation `json:"locations,omitempty"`
-	// Meta is ACP's extension channel. ZERO-owned values must remain beneath a
-	// namespaced key so protocol-shaped clients can preserve them while decoding
-	// and re-encoding a tool call.
-	Meta map[string]json.RawMessage `json:"_meta,omitempty"`
-}
-
-// BrowserToolDetails identifies the browser helper operation behind a tool
-// call. Version is the schema version for this optional ZERO extension;
-// Command is one of install, launch, connect, open, snapshot, click, type,
-// press, or action. Future fields must remain display-safe and must not
-// include browser profile data, cookies, typed text, URL paths/queries, or
-// DevTools endpoints.
-type BrowserToolDetails struct {
-	Version int    `json:"version"`
-	Command string `json:"command"`
-}
-
-// ToolCallContent is a tool call's rendered output. ZERO emits "content" (a
-// text/image block) and "diff" (a file change); "terminal" is part of the spec
-// but unused because ZERO executes locally.
-type ToolCallContent struct {
-	Type string `json:"type"`
-	// type == "content"
-	Content *ContentBlock `json:"content,omitempty"`
-	// type == "diff"
-	Path    string  `json:"path,omitempty"`
-	OldText *string `json:"oldText,omitempty"`
-	NewText *string `json:"newText,omitempty"`
-}
-
-// MarshalJSON preserves ACP's discriminated content union. A diff always has
-// path, while nullable oldText/newText distinguish creation, deletion, and an
-// existing file replaced with empty content. Other content variants omit all
-// diff fields rather than serializing irrelevant nulls.
-func (content ToolCallContent) MarshalJSON() ([]byte, error) {
-	if content.Type == "diff" {
-		return json.Marshal(struct {
-			Type    string  `json:"type"`
-			Path    string  `json:"path"`
-			OldText *string `json:"oldText"`
-			NewText *string `json:"newText"`
-		}{
-			Type: content.Type, Path: content.Path, OldText: content.OldText, NewText: content.NewText,
-		})
-	}
-	return json.Marshal(struct {
-		Type    string        `json:"type"`
-		Content *ContentBlock `json:"content,omitempty"`
-	}{Type: content.Type, Content: content.Content})
-}
-
-func ToolContent(block ContentBlock) ToolCallContent {
-	return ToolCallContent{Type: "content", Content: &block}
-}
-
-type ToolCallLocation struct {
-	Path string `json:"path"`
-	Line *int   `json:"line,omitempty"`
-}
-
-// ---- plan ----
-
-const (
-	PlanStatusPending    = "pending"
-	PlanStatusInProgress = "in_progress"
-	PlanStatusCompleted  = "completed"
-
-	PlanPriorityHigh   = "high"
-	PlanPriorityMedium = "medium"
-	PlanPriorityLow    = "low"
-)
-
-type PlanEntry struct {
-	Content  string `json:"content"`
-	Priority string `json:"priority"`
-	Status   string `json:"status"`
-}
-
-type PlanUpdate struct {
-	SessionUpdate string      `json:"sessionUpdate"`
-	Entries       []PlanEntry `json:"entries"`
-}
-
-type AvailableCommand struct {
-	Name        string `json:"name"`
-	Description string `json:"description"`
-}
-
-type AvailableCommandsUpdate struct {
-	SessionUpdate     string             `json:"sessionUpdate"`
-	AvailableCommands []AvailableCommand `json:"availableCommands"`
-}
-
-type CurrentModeUpdate struct {
-	SessionUpdate string `json:"sessionUpdate"`
-	CurrentModeID string `json:"currentModeId"`
-}
-
-// ---- permissions ----
-
-const (
-	PermAllowOnce    = "allow_once"
-	PermAllowAlways  = "allow_always"
-	PermRejectOnce   = "reject_once"
-	PermRejectAlways = "reject_always"
-)
-
-type PermissionOption struct {
-	OptionID string `json:"optionId"`
-	Name     string `json:"name"`
-	Kind     string `json:"kind"`
-}
-
-type RequestPermissionParams struct {
-	SessionID string             `json:"sessionId"`
-	ToolCall  ToolCallUpdate     `json:"toolCall"`
-	Options   []PermissionOption `json:"options"`
-}
-
-// RequestPermissionOutcome is a tagged union: {"outcome":"cancelled"} or
-// {"outcome":"selected","optionId":"..."}.
-type RequestPermissionOutcome struct {
-	Outcome  string `json:"outcome"`
-	OptionID string `json:"optionId,omitempty"`
-}
-
-const (
-	OutcomeSelected  = "selected"
-	OutcomeCancelled = "cancelled"
-)
-
-type RequestPermissionResult struct {
-	Outcome RequestPermissionOutcome `json:"outcome"`
-}
-
-// ---- session modes ----
-
-type SessionMode struct {
-	ID          string `json:"id"`
-	Name        string `json:"name"`
-	Description string `json:"description,omitempty"`
-}
-
-type SessionModeState struct {
-	CurrentModeID  string        `json:"currentModeId"`
-	AvailableModes []SessionMode `json:"availableModes"`
-}
-
-type SetSessionModeParams struct {
-	SessionID string `json:"sessionId"`
-	ModeID    string `json:"modeId"`
-}
-
-type SetSessionModeResult struct{}
-
-// ---- session config options ----
-
-type SessionConfigOptionValue struct {
-	Value       string `json:"value"`
-	Name        string `json:"name"`
-	Description string `json:"description,omitempty"`
-}
-
-type SessionConfigOption struct {
-	ID           string                     `json:"id"`
-	Name         string                     `json:"name"`
-	Description  string                     `json:"description,omitempty"`
-	Category     string                     `json:"category,omitempty"`
-	Type         string                     `json:"type"`
-	CurrentValue string                     `json:"currentValue"`
-	Options      []SessionConfigOptionValue `json:"options"`
-}
-
-type SetSessionConfigOptionParams struct {
-	SessionID string `json:"sessionId"`
-	ConfigID  string `json:"configId"`
-	Value     string `json:"value"`
-}
-
-type SetSessionConfigOptionResult struct {
-	ConfigOptions []SessionConfigOption `json:"configOptions"`
-}
-
-// ---- vendor: _zero/set_model ----
-
-type ZeroSetModelParams struct {
-	SessionID string `json:"sessionId"`
-	Model     string `json:"model"`
-}
-
-type ZeroSetModelResult struct {
-	Model string `json:"model"`
-}
-
-const (
-	configIDModel = "model"
-	configIDMode  = "mode"
-
-	configOptionTypeSelect = "select"
-	configCategoryModel    = "model"
-	configCategoryMode     = "mode"
-)

internal/acp/usage_test.go

@@ -1,309 +0,0 @@
-package acp
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"strings"
-	"testing"
-	"time"
-
-	"github.com/Gitlawb/zero/internal/agent"
-	"github.com/Gitlawb/zero/internal/sessions"
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-// `zero exec` persists every provider usage report as a session usage event, so
-// `zero usage report --session <id>` can total a run. The ACP agent did not set
-// OnUsage, which dropped the token counts of every ACP session. A turn with two
-// provider requests (a tool round trip) must leave two usage events, in the shape
-// the usage report reads, next to the turn's messages.
-func TestACPPromptPersistsProviderUsage(t *testing.T) {
-	deps := testDeps(t)
-	deps.RunAgent = func(_ context.Context, _ string, _ zeroruntime.Provider, opts agent.Options) (agent.Result, error) {
-		if opts.OnUsage == nil {
-			t.Errorf("agent.Options.OnUsage is not wired: the ACP agent drops provider token usage")
-			return agent.Result{FinalAnswer: "done"}, nil
-		}
-		opts.OnUsage(agent.Usage{InputTokens: 1200, OutputTokens: 34})
-		opts.OnUsage(agent.Usage{InputTokens: 1300, OutputTokens: 21, CachedInputTokens: 900})
-		return agent.Result{FinalAnswer: "done"}, nil
-	}
-
-	h := newHarness(t, deps)
-	defer h.stop()
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-	var created NewSessionResult
-	if err := h.client.Call(ctx, MethodSessionNew, NewSessionParams{Cwd: t.TempDir()}, &created); err != nil {
-		t.Fatal(err)
-	}
-	var result PromptResult
-	if err := h.client.Call(ctx, MethodSessionPrompt, PromptParams{
-		SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock("count my tokens")},
-	}, &result); err != nil {
-		t.Fatalf("session/prompt: %v", err)
-	}
-
-	events, err := deps.Store.ReadEvents(created.SessionID)
-	if err != nil {
-		t.Fatal(err)
-	}
-	type usagePayload struct {
-		PromptTokens      int `json:"promptTokens"`
-		CompletionTokens  int `json:"completionTokens"`
-		TotalTokens       int `json:"totalTokens"`
-		CachedInputTokens int `json:"cachedInputTokens"`
-	}
-	var got []usagePayload
-	messages := 0
-	for _, event := range events {
-		switch event.Type {
-		case sessions.EventUsage:
-			var payload usagePayload
-			if err := json.Unmarshal(event.Payload, &payload); err != nil {
-				t.Fatalf("usage payload %s: %v", event.Payload, err)
-			}
-			assertUsagePayloadIsTokenCountsOnly(t, event.Payload)
-			got = append(got, payload)
-		case sessions.EventMessage:
-			messages++
-		}
-	}
-	want := []usagePayload{
-		{PromptTokens: 1200, CompletionTokens: 34, TotalTokens: 1234},
-		{PromptTokens: 1300, CompletionTokens: 21, TotalTokens: 1321, CachedInputTokens: 900},
-	}
-	if len(got) != len(want) {
-		t.Fatalf("usage events = %+v, want %+v", got, want)
-	}
-	for i := range want {
-		if got[i] != want[i] {
-			t.Fatalf("usage event %d = %+v, want %+v", i, got[i], want[i])
-		}
-	}
-	if messages != 2 {
-		t.Fatalf("message events = %d, want the user and assistant messages of the turn", messages)
-	}
-}
-
-// Usage joins the turn's buffered batch, so a hard run failure that aborts the
-// turn leaves nothing durable, exactly as it does for the turn's messages.
-func TestACPHardTurnFailureDropsItsUsageWithTheTurn(t *testing.T) {
-	deps := testDeps(t)
-	deps.RunAgent = func(_ context.Context, _ string, _ zeroruntime.Provider, opts agent.Options) (agent.Result, error) {
-		if opts.OnUsage == nil {
-			t.Errorf("agent.Options.OnUsage is not wired: the ACP agent drops provider token usage")
-			return agent.Result{}, errors.New("injected hard run failure")
-		}
-		opts.OnUsage(agent.Usage{InputTokens: 500, OutputTokens: 5})
-		return agent.Result{}, errors.New("injected hard run failure")
-	}
-
-	h := newHarness(t, deps)
-	defer h.stop()
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-	var created NewSessionResult
-	if err := h.client.Call(ctx, MethodSessionNew, NewSessionParams{Cwd: t.TempDir()}, &created); err != nil {
-		t.Fatal(err)
-	}
-	if err := h.client.Call(ctx, MethodSessionPrompt, PromptParams{
-		SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock("failing turn")},
-	}, &PromptResult{}); err == nil {
-		t.Fatal("hard RunAgent failure was reported as a successful turn")
-	}
-	events, err := deps.Store.ReadEvents(created.SessionID)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if len(events) != 0 {
-		t.Fatalf("aborted turn left durable events: %+v", events)
-	}
-}
-
-// StopCancelled is a successful ACP outcome: the turn commits. Tokens the
-// provider already reported were spent, so they stay in the session log even
-// though the client cancelled. A hard error (the test above) is the path that
-// drops them.
-func TestACPCancelledTurnKeepsReportedUsage(t *testing.T) {
-	deps := testDeps(t)
-	deps.RunAgent = func(_ context.Context, _ string, _ zeroruntime.Provider, opts agent.Options) (agent.Result, error) {
-		if opts.OnUsage == nil {
-			t.Errorf("agent.Options.OnUsage is not wired: the ACP agent drops provider token usage")
-			return agent.Result{}, context.Canceled
-		}
-		opts.OnUsage(agent.Usage{InputTokens: 80, OutputTokens: 3})
-		return agent.Result{FinalAnswer: "partial"}, context.Canceled
-	}
-
-	h := newHarness(t, deps)
-	defer h.stop()
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-	var created NewSessionResult
-	if err := h.client.Call(ctx, MethodSessionNew, NewSessionParams{Cwd: t.TempDir()}, &created); err != nil {
-		t.Fatal(err)
-	}
-	var result PromptResult
-	if err := h.client.Call(ctx, MethodSessionPrompt, PromptParams{
-		SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock("cancelled turn")},
-	}, &result); err != nil {
-		t.Fatalf("cancelled turn returned an RPC error: %v", err)
-	}
-	if result.StopReason != StopCancelled {
-		t.Fatalf("stop reason = %q, want %q", result.StopReason, StopCancelled)
-	}
-	events, err := deps.Store.ReadEvents(created.SessionID)
-	if err != nil {
-		t.Fatal(err)
-	}
-	usageEvents := 0
-	for _, event := range events {
-		if event.Type != sessions.EventUsage {
-			continue
-		}
-		usageEvents++
-		assertUsagePayloadIsTokenCountsOnly(t, event.Payload)
-		var payload struct {
-			PromptTokens     int `json:"promptTokens"`
-			CompletionTokens int `json:"completionTokens"`
-			TotalTokens      int `json:"totalTokens"`
-		}
-		if err := json.Unmarshal(event.Payload, &payload); err != nil {
-			t.Fatal(err)
-		}
-		if payload.PromptTokens != 80 || payload.CompletionTokens != 3 || payload.TotalTokens != 83 {
-			t.Fatalf("cancelled-turn usage = %+v, want 80/3/83", payload)
-		}
-	}
-	if usageEvents != 1 {
-		t.Fatalf("usage events = %d, want the one report from the cancelled turn", usageEvents)
-	}
-}
-
-// Usage events sit in the same log session/load and session/resume read, but
-// history reconstruction skips them. The wire replay stays the conversation,
-// and the next turn's prompt stays the conversation: token counts never become
-// context and never cross the ACP wire.
-func TestACPLoadAndResumeIgnoreUsageEvents(t *testing.T) {
-	const userLine = "unique-acp-user-line"
-	const answer = "unique-acp-answer"
-	deps := testDeps(t)
-	deps.RunAgent = func(_ context.Context, _ string, _ zeroruntime.Provider, opts agent.Options) (agent.Result, error) {
-		if opts.OnUsage == nil {
-			t.Errorf("agent.Options.OnUsage is not wired: the ACP agent drops provider token usage")
-			return agent.Result{FinalAnswer: answer}, nil
-		}
-		opts.OnUsage(agent.Usage{InputTokens: 1200, OutputTokens: 34})
-		return agent.Result{FinalAnswer: answer}, nil
-	}
-
-	workspace := t.TempDir()
-	h := newHarness(t, deps)
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-	var created NewSessionResult
-	if err := h.client.Call(ctx, MethodSessionNew, NewSessionParams{Cwd: workspace}, &created); err != nil {
-		t.Fatal(err)
-	}
-	if err := h.client.Call(ctx, MethodSessionPrompt, PromptParams{
-		SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock(userLine)},
-	}, &PromptResult{}); err != nil {
-		t.Fatalf("session/prompt: %v", err)
-	}
-	h.stop()
-
-	events, err := deps.Store.ReadEvents(created.SessionID)
-	if err != nil {
-		t.Fatal(err)
-	}
-	sawUsage := false
-	for _, event := range events {
-		if event.Type == sessions.EventUsage {
-			sawUsage = true
-			assertUsagePayloadIsTokenCountsOnly(t, event.Payload)
-		}
-	}
-	if !sawUsage {
-		t.Fatal("session log has no usage event to ignore")
-	}
-
-	loader := newHarness(t, deps)
-	if err := loader.client.Call(ctx, MethodSessionLoad, LoadSessionParams{
-		SessionID: created.SessionID, Cwd: workspace, McpServers: []McpServer{},
-	}, &LoadSessionResult{}); err != nil {
-		t.Fatalf("session/load: %v", err)
-	}
-	var replayed []string
-	for {
-		select {
-		case update := <-loader.notifications:
-			replayed = append(replayed, update.Content.Text)
-		case <-time.After(150 * time.Millisecond):
-			goto drained
-		}
-	}
-drained:
-	loader.stop()
-	if len(replayed) != 2 || replayed[0] != userLine || replayed[1] != answer {
-		t.Fatalf("session/load replay = %#v, want the user line and the answer only", replayed)
-	}
-	for _, text := range replayed {
-		if strings.Contains(text, "promptTokens") || strings.Contains(text, "1200") {
-			t.Fatalf("session/load replayed usage onto the wire: %q", text)
-		}
-	}
-
-	var gotPrompt string
-	deps.RunAgent = func(_ context.Context, prompt string, _ zeroruntime.Provider, _ agent.Options) (agent.Result, error) {
-		gotPrompt = prompt
-		return agent.Result{FinalAnswer: "continued"}, nil
-	}
-	resumer := newHarness(t, deps)
-	defer resumer.stop()
-	if err := resumer.client.Call(ctx, MethodSessionResume, ResumeSessionParams{
-		SessionID: created.SessionID, Cwd: workspace, McpServers: []McpServer{},
-	}, &ResumeSessionResult{}); err != nil {
-		t.Fatalf("session/resume: %v", err)
-	}
-	if err := resumer.client.Call(ctx, MethodSessionPrompt, PromptParams{
-		SessionID: created.SessionID, Prompt: []ContentBlock{TextBlock("carry on")},
-	}, &PromptResult{}); err != nil {
-		t.Fatalf("resumed session/prompt: %v", err)
-	}
-	if !strings.Contains(gotPrompt, userLine) || !strings.Contains(gotPrompt, answer) {
-		t.Fatalf("resumed prompt = %q, want the prior conversation", gotPrompt)
-	}
-	if strings.Contains(gotPrompt, "promptTokens") || strings.Contains(gotPrompt, "1200") {
-		t.Fatalf("resumed prompt contains persisted usage: %q", gotPrompt)
-	}
-}
-
-// usagePayloadAllowedKeys is the non-escalating EventUsagePayload shape. ACP
-// has no model escalation, and the writer must not grow a prompt, tool
-// argument, or other raw field.
-var usagePayloadAllowedKeys = map[string]bool{
-	"promptTokens":      true,
-	"completionTokens":  true,
-	"totalTokens":       true,
-	"cachedInputTokens": true,
-	"cacheWriteTokens":  true,
-	"reasoningTokens":   true,
-}
-
-func assertUsagePayloadIsTokenCountsOnly(t *testing.T, payload json.RawMessage) {
-	t.Helper()
-	var raw map[string]json.RawMessage
-	if err := json.Unmarshal(payload, &raw); err != nil {
-		t.Fatalf("usage payload %s: %v", payload, err)
-	}
-	if len(raw) == 0 {
-		t.Fatalf("usage payload is empty: %s", payload)
-	}
-	for key := range raw {
-		if !usagePayloadAllowedKeys[key] {
-			t.Fatalf("usage payload key %q is not a token count: %s", key, payload)
-		}
-	}
-}

internal/agent/acceptance_gate_test.go

@@ -1,248 +0,0 @@
-package agent
-
-import (
-	"context"
-	"strings"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/tools"
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-func enabledSelfCorrector(t *testing.T) *SelfCorrector {
-	t.Helper()
-	// checker/verifier nil → no LSP / project-test pass runs; we only need a
-	// non-nil SelfCorrector to enable the task-grounded acceptance gate.
-	return NewSelfCorrector(t.TempDir(), nil, nil, SelfCorrectConfig{Enabled: true})
-}
-
-// BUG #2(a): a final message that admits the model guessed / could not meet the
-// objective must be reported as INCOMPLETE, never success — and immediately
-// (an admitted guess is not worth re-prompting).
-func TestAcceptanceSelfReportAdmissionIsIncomplete(t *testing.T) {
-	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		textTurn("I couldn't analyze the board image, so I wrote the common opening move e2e4 as my best guess."),
-	}}
-
-	result, err := Run(context.Background(), "write the best chess move", provider, Options{
-		Registry:                tools.NewRegistry(),
-		MaxTurns:                10,
-		RequireCompletionSignal: true,
-		SelfCorrect:             enabledSelfCorrector(t),
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !result.Incomplete {
-		t.Fatalf("admitted guess must be Incomplete, got success; final=%q", result.FinalAnswer)
-	}
-	if !strings.Contains(result.IncompleteReason, "objective was not met") {
-		t.Fatalf("IncompleteReason = %q, want it to cite the admission", result.IncompleteReason)
-	}
-	if len(provider.requests) != 1 {
-		t.Fatalf("an admission should downgrade immediately (1 turn), got %d", len(provider.requests))
-	}
-}
-
-// BUG #2(a): the inability detector must generalize over the verb the model uses
-// (so re-phrasing can't defeat it) while NOT misreading success-y negations
-// ("could not find any issues") as admissions.
-func TestSelfReportedIncompletionMatching(t *testing.T) {
-	cases := []struct {
-		text  string
-		admit bool
-	}{
-		// real chess re-run wording that slipped a fixed phrase list:
-		{"…which I cannot do without proper image analysis capabilities.", true},
-		{"I cannot visually analyze the chess board image.", true},
-		{"I could not recover the original values, so this is my best guess.", true},
-		{"I was unable to complete the optimization.", true},
-		{"The result may not be correct.", true},
-		// multi-occurrence: an early guarded use ("could not find any") must NOT mask a
-		// later genuine admission with the same stem (review #5):
-		{"I could not find any examples in the codebase, so I could not implement the feature.", true},
-		// genuine successes that must NOT be flagged:
-		{"I implemented the function and all tests pass.", false},
-		{"I verified the fix; I could not find any remaining issues.", false},
-		{"I cannot reproduce the bug, so the fix holds.", false},
-		{"Done — the output matches the required format and values.", false},
-		// behavior descriptions that must NOT be flagged — these phrases describe
-		// implemented behavior, not an admission (review #1, removed from the list):
-		{"The parser will fall back to UTF-8 when no encoding is set.", false},
-		{"I replaced the placeholder value with the computed key.", false},
-		{"The retry uses exponential backoff as a fallback.", false},
-		{"Without proper error handling the function would crash, so I added it.", false},
-		// real false positive (conversational recap): retelling a PAST exchange is
-		// not an admission about the current objective — the sentence carries its
-		// own narrative context ("You asked …", "at the time"):
-		{"You asked if I could work autonomously on zero if you gave me a GitHub account — I was honest that my sandbox had no repo, no build system, and no network/integration wired up yet, so I couldn't actually do it at the time.", false},
-		{"When we last spoke, I couldn't reach the GitHub API from the sandbox.", false},
-		{"Last session I was unable to build the project; that is what we should retry now.", false},
-		// quoted admissions (the model citing its own earlier message or a log
-		// line) must NOT be flagged:
-		{`My earlier reply said "I couldn't do it" but the tooling is now installed.`, false},
-		{"The run log contains `I cannot access the network`, which is expected inside the sandbox.", false},
-		// current-objective admissions must STILL be flagged, including past tense
-		// and multi-sentence finals whose other sentences are narrative:
-		{"I couldn't complete the refactor.", true},
-		{"I hit an error I could not resolve, so the migration is unfinished.", true},
-		{"You asked me to port the parser. I couldn't finish the second half.", true},
-		// unbalanced delimiters must not swallow the tail (only BALANCED quoted
-		// spans are stripped), so an admission after a stray quote still fires:
-		{"The log ends with a stray \" and I couldn't finish the migration.", true},
-		{"There is an unterminated `code span and I cannot proceed with the fix.", true},
-		{"The doc opens with “a curly quote and I was unable to complete the task.", true},
-	}
-	for _, c := range cases {
-		got := selfReportedIncompletion(c.text) != ""
-		if got != c.admit {
-			t.Errorf("selfReportedIncompletion(%q) admitted=%v, want %v", c.text, got, c.admit)
-		}
-	}
-}
-
-// BUG #2(a): a "cannot analyze / cannot determine" admission (present tense) must
-// be caught even when the model also stamps a bogus "PASS" based on a shape check.
-// Mirrors the chess-best-move final ("I cannot analyze the position… PASS: I wrote
-// the move and verified by reading it back").
-func TestAcceptanceCannotPhrasingIsIncomplete(t *testing.T) {
-	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		textTurn("I cannot analyze the specific position from the image, so I cannot determine the best move. PASS: I wrote e2e4 to the file and verified it by reading it back."),
-	}}
-
-	result, err := Run(context.Background(), "write the best move", provider, Options{
-		Registry:                tools.NewRegistry(),
-		MaxTurns:                10,
-		RequireCompletionSignal: true,
-		SelfCorrect:             enabledSelfCorrector(t),
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !result.Incomplete {
-		t.Fatalf("a 'cannot analyze/determine' admission must be Incomplete despite the bogus PASS; final=%q", result.FinalAnswer)
-	}
-}
-
-// A pending/in_progress update_plan item is an AMBIGUOUS signal (the model may have
-// finished without re-marking the step), so it must NOT by itself force INCOMPLETE.
-// The gate nudges, but if the model keeps claiming completion with no continuation
-// cue and no admission, the run finalizes as SUCCESS — trusting the completion claim
-// over stale plan bookkeeping. (Only a continuation cue or self-report admission
-// forces INCOMPLETE; see TestCompletionGate* and TestAcceptance*Admission*.)
-func TestPendingPlanAloneDoesNotForceIncomplete(t *testing.T) {
-	registry := tools.NewRegistry()
-	registry.Register(tools.NewUpdatePlanTool())
-	done := "All set." // confident; no cue, no admission — only the plan is stale
-	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		planTurn("completed", "in_progress"),
-		textTurn(done), textTurn(done), textTurn(done), textTurn(done), textTurn(done),
-	}}
-
-	result, err := Run(context.Background(), "do the multi-step task", provider, Options{
-		Registry:                registry,
-		MaxTurns:                10,
-		RequireCompletionSignal: true,
-		SelfCorrect:             enabledSelfCorrector(t),
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.Incomplete {
-		t.Fatalf("pending-plan alone must NOT force Incomplete (stale bookkeeping != unfinished); reason=%q", result.IncompleteReason)
-	}
-	if result.FinalAnswer != done {
-		t.Fatalf("final answer = %q, want the completion claim %q", result.FinalAnswer, done)
-	}
-	if !someRequestContains(provider.requests, continueNudgeMarker) {
-		t.Fatalf("expected at least one continue-nudge before accepting completion")
-	}
-}
-
-// BUG #2(b): when self-correct is on, the run must pass a one-time task-grounded
-// acceptance check before success. A model that, when challenged, confirms its
-// work meets the criterion (no admission) then finalizes as success — no regression.
-func TestAcceptanceGroundedCompletionSucceeds(t *testing.T) {
-	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		textTurn("I implemented the function."),
-		textTurn("PASS. I ran the verification and it passes; the output meets the task requirement."),
-	}}
-
-	result, err := Run(context.Background(), "implement the function", provider, Options{
-		Registry:                tools.NewRegistry(),
-		MaxTurns:                10,
-		RequireCompletionSignal: true,
-		SelfCorrect:             enabledSelfCorrector(t),
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.Incomplete {
-		t.Fatalf("a verified completion must succeed, got Incomplete (%q)", result.IncompleteReason)
-	}
-	if result.FinalAnswer != "PASS. I ran the verification and it passes; the output meets the task requirement." {
-		t.Fatalf("final answer = %q", result.FinalAnswer)
-	}
-	// Exactly one acceptance pass: the first "done" turn was challenged, the second confirmed.
-	if len(provider.requests) != 2 {
-		t.Fatalf("expected 2 turns (1 acceptance challenge + 1 confirmation), got %d", len(provider.requests))
-	}
-	if !someRequestContains(provider.requests, acceptanceNudgeMarker) {
-		t.Fatalf("expected the task-grounded acceptance check to be demanded")
-	}
-}
-
-// With the gate OFF (interactive/TUI default), even an admission is accepted as the
-// final answer exactly as before — proving no behavior change for non-headless callers.
-func TestAcceptanceGateOffLeavesAdmissionAsSuccess(t *testing.T) {
-	admission := "I couldn't determine the value, so this is a guess."
-	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		textTurn(admission),
-	}}
-
-	result, err := Run(context.Background(), "do a thing", provider, Options{
-		Registry: tools.NewRegistry(),
-		MaxTurns: 10,
-		// RequireCompletionSignal false, SelfCorrect nil — the legacy path.
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.Incomplete {
-		t.Fatalf("legacy path must never set Incomplete; final=%q", result.FinalAnswer)
-	}
-	if result.FinalAnswer != admission {
-		t.Fatalf("final answer = %q, want the text verbatim (legacy behavior)", result.FinalAnswer)
-	}
-	if len(provider.requests) != 1 {
-		t.Fatalf("legacy path must not re-prompt; got %d turns", len(provider.requests))
-	}
-}
-
-// The acceptance check is scoped to runs with self-correct on: a headless run
-// WITHOUT a SelfCorrector accepts a confident completion immediately (the (b) gate
-// is inert), so enabling RequireCompletionSignal alone adds no acceptance turn.
-func TestAcceptanceGateRequiresSelfCorrect(t *testing.T) {
-	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		textTurn("Done. Implemented and it works."),
-	}}
-
-	result, err := Run(context.Background(), "implement it", provider, Options{
-		Registry:                tools.NewRegistry(),
-		MaxTurns:                10,
-		RequireCompletionSignal: true,
-		// SelfCorrect deliberately nil → acceptance gate (b) must not fire.
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.Incomplete {
-		t.Fatalf("confident completion without self-correct must succeed; reason=%q", result.IncompleteReason)
-	}
-	if len(provider.requests) != 1 {
-		t.Fatalf("acceptance gate must not fire without self-correct; got %d turns", len(provider.requests))
-	}
-	if someRequestContains(provider.requests, acceptanceNudgeMarker) {
-		t.Fatalf("acceptance nudge must not be injected when self-correct is off")
-	}
-}

internal/agent/additional_permissions_validation_test.go

@@ -1,398 +0,0 @@
-package agent
-
-import (
-	"context"
-	"strings"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/sandbox"
-	"github.com/Gitlawb/zero/internal/tools"
-)
-
-type normalizationRecordingShellTool struct {
-	calls []map[string]any
-}
-
-func (tool *normalizationRecordingShellTool) Name() string { return "bash" }
-func (tool *normalizationRecordingShellTool) Description() string {
-	return "record normalized shell arguments"
-}
-func (tool *normalizationRecordingShellTool) Parameters() tools.Schema {
-	return tools.Schema{Type: "object", AdditionalProperties: true}
-}
-func (tool *normalizationRecordingShellTool) Safety() tools.Safety {
-	return tools.Safety{SideEffect: tools.SideEffectShell, Permission: tools.PermissionAllow}
-}
-func (tool *normalizationRecordingShellTool) Run(_ context.Context, args map[string]any) tools.Result {
-	tool.calls = append(tool.calls, cloneArgs(args))
-	return tools.Result{Status: tools.StatusOK}
-}
-
-// A shell call that sets sandbox_permissions: with_additional_permissions but
-// omits (or malforms) additional_permissions can never succeed: the same
-// validation runs again at grant time regardless of the user's decision. It
-// must be rejected as a plain tool error BEFORE any permission prompt, not
-// surfaced as a confusing "approved but denied" prompt outcome.
-func TestExecuteToolCallRejectsMissingAdditionalPermissionsBeforePrompt(t *testing.T) {
-	root := t.TempDir()
-	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedBashTool(root, nil))
-
-	promptCalls := 0
-	result, err := executeToolCall(
-		context.Background(),
-		registry,
-		ToolCall{
-			ID:        "c1",
-			Name:      "bash",
-			Arguments: `{"command":"echo hi","sandbox_permissions":"with_additional_permissions"}`,
-		},
-		PermissionModeAuto,
-		Options{
-			OnPermissionRequest: func(ctx context.Context, request PermissionRequest) (PermissionDecision, error) {
-				promptCalls++
-				return PermissionDecision{Action: PermissionDecisionAllow}, nil
-			},
-		},
-	)
-	if err != nil {
-		t.Fatalf("executeToolCall: %v", err)
-	}
-	if result.Status != tools.StatusError {
-		t.Fatalf("status = %q, want error", result.Status)
-	}
-	if promptCalls != 0 {
-		t.Fatalf("OnPermissionRequest called %d times, want 0 (must reject before prompting)", promptCalls)
-	}
-}
-
-// The mismatched-flag case (additional_permissions present without the
-// sandbox_permissions flag) must be rejected the same way.
-func TestExecuteToolCallRejectsAdditionalPermissionsWithoutFlagBeforePrompt(t *testing.T) {
-	root := t.TempDir()
-	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedBashTool(root, nil))
-
-	promptCalls := 0
-	result, err := executeToolCall(
-		context.Background(),
-		registry,
-		ToolCall{
-			ID:        "c1",
-			Name:      "bash",
-			Arguments: `{"command":"echo hi","additional_permissions":{"network":{"enabled":true}}}`,
-		},
-		PermissionModeAuto,
-		Options{
-			OnPermissionRequest: func(ctx context.Context, request PermissionRequest) (PermissionDecision, error) {
-				promptCalls++
-				return PermissionDecision{Action: PermissionDecisionAllow}, nil
-			},
-		},
-	)
-	if err != nil {
-		t.Fatalf("executeToolCall: %v", err)
-	}
-	if result.Status != tools.StatusError {
-		t.Fatalf("status = %q, want error", result.Status)
-	}
-	if promptCalls != 0 {
-		t.Fatalf("OnPermissionRequest called %d times, want 0 (must reject before prompting)", promptCalls)
-	}
-}
-
-// The rejection message must show a concrete, correctly-shaped example: a
-// model that gets this wrong once (attaching sandbox_permissions out of habit
-// from an earlier call, without a valid payload) needs enough in the error to
-// self-correct on retry instead of repeating the identical mistake.
-func TestExecuteToolCallMissingAdditionalPermissionsErrorIsActionable(t *testing.T) {
-	root := t.TempDir()
-	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedBashTool(root, nil))
-
-	result, err := executeToolCall(
-		context.Background(),
-		registry,
-		ToolCall{
-			ID:        "c1",
-			Name:      "bash",
-			Arguments: `{"command":"ping example.com","sandbox_permissions":"with_additional_permissions"}`,
-		},
-		PermissionModeAuto,
-		Options{},
-	)
-	if err != nil {
-		t.Fatalf("executeToolCall: %v", err)
-	}
-	if !strings.Contains(result.Output, `{"network": {"enabled": true}}`) {
-		t.Fatalf("output = %q, want a concrete additional_permissions example", result.Output)
-	}
-	assertNamesOmitRemedy(t, "missing additional_permissions", result.Output)
-}
-
-// A well-formed additional_permissions payload must still reach the normal
-// permission prompt: this fix only rejects malformed payloads.
-func TestExecuteToolCallStillPromptsForValidAdditionalPermissions(t *testing.T) {
-	root := t.TempDir()
-	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedBashTool(root, nil))
-
-	promptCalls := 0
-	_, err := executeToolCall(
-		context.Background(),
-		registry,
-		ToolCall{
-			ID:   "c1",
-			Name: "bash",
-			Arguments: `{"command":"echo hi","sandbox_permissions":"with_additional_permissions",` +
-				`"additional_permissions":{"network":{"enabled":true}}}`,
-		},
-		PermissionModeAuto,
-		Options{
-			OnPermissionRequest: func(ctx context.Context, request PermissionRequest) (PermissionDecision, error) {
-				promptCalls++
-				return PermissionDecision{Action: PermissionDecisionDeny}, nil
-			},
-		},
-	)
-	if err != nil {
-		t.Fatalf("executeToolCall: %v", err)
-	}
-	if promptCalls != 1 {
-		t.Fatalf("OnPermissionRequest called %d times, want exactly 1 for a valid elevation request", promptCalls)
-	}
-}
-
-// runShellCall drives one shell tool call through the real registry (and so
-// through Registry.RunWithOptions) exactly as the agent loop would.
-func runShellCall(t *testing.T, root string, arguments string) ToolResult {
-	t.Helper()
-	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedExecCommandTool(root, nil, nil))
-	result, err := executeToolCall(
-		context.Background(),
-		registry,
-		ToolCall{ID: "c1", Name: "exec_command", Arguments: arguments},
-		PermissionModeUnsafe,
-		Options{Cwd: root},
-	)
-	if err != nil {
-		t.Fatalf("executeToolCall: %v", err)
-	}
-	return result
-}
-
-// TestAdditionalPermissionsRejectionsConverge is the regression guard for
-// #845/#847. A model that attaches a permission object to a command needing
-// none used to be told only "set sandbox_permissions", which pushed it into the
-// OTHER invalid shape (flag set, payload empty) and its "include a permission"
-// error pushed it straight back — the reported loop that burned turns on
-// `git branch --show-current`.
-//
-// The contract this pins is convergence, not tolerance: both shapes are still
-// REJECTED (nothing here grants access), but each rejection must name the one
-// follow-up call that works, and that follow-up must actually succeed.
-func TestAdditionalPermissionsRejectionsConverge(t *testing.T) {
-	root := t.TempDir()
-	const readOnly = `"cmd":"git --version"`
-
-	// Step 1 of the reported loop: a permission object with no flag.
-	first := runShellCall(t, root, `{`+readOnly+`,"additional_permissions":{"network":{"enabled":true}}}`)
-	if first.Status != tools.StatusError {
-		t.Fatalf("unflagged additional_permissions status = %q, want error (rejecting is correct)", first.Status)
-	}
-	assertNamesOmitRemedy(t, "unflagged additional_permissions", first.Output)
-
-	// Step 2 of the reported loop: the model keeps the flag but empties the
-	// payload. This must not be the dead end it was.
-	second := runShellCall(t, root, `{`+readOnly+`,"sandbox_permissions":"with_additional_permissions"}`)
-	if second.Status != tools.StatusError {
-		t.Fatalf("flag without payload status = %q, want error", second.Status)
-	}
-	assertNamesOmitRemedy(t, "flag without payload", second.Output)
-
-	// The call both errors point at must actually work.
-	converged := runShellCall(t, root, `{`+readOnly+`}`)
-	if converged.Status != tools.StatusOK {
-		t.Fatalf("the call both errors instruct the model to make failed: status=%q output=%q", converged.Status, converged.Output)
-	}
-}
-
-// assertNamesOmitRemedy pins the actionable half of the error text: the message
-// must spell out that BOTH fields can simply be dropped. "Set the flag" or
-// "include a permission" alone is what made the two errors chase each other.
-func assertNamesOmitRemedy(t *testing.T, label string, output string) {
-	t.Helper()
-	if !strings.Contains(output, "omit both sandbox_permissions and additional_permissions") {
-		t.Fatalf("%s error = %q, want it to say to omit both fields entirely", label, output)
-	}
-	if !strings.Contains(output, "retry") {
-		t.Fatalf("%s error = %q, want it to tell the model to retry", label, output)
-	}
-}
-
-// The empty-payload rejection carries the same remedy. It is pinned on the
-// validator directly because normalizeNoopAdditionalPermissions absorbs the
-// empty payload before executeToolCall reaches this branch;
-// inlineAdditionalPermissionsProfile is still the shared source of truth that
-// buildPermissionEvent and the grant path re-run, so its text must converge too.
-func TestEmptyAdditionalPermissionsErrorNamesOmitRemedy(t *testing.T) {
-	args := map[string]any{
-		"cmd":                 "git --version",
-		"sandbox_permissions": string(tools.SandboxPermissionsWithAdditionalPermissions),
-		"additional_permissions": map[string]any{
-			"network":     map[string]any{"enabled": false},
-			"file_system": map[string]any{"read": []any{}, "write": []any{}},
-		},
-	}
-	_, requested, err := inlineAdditionalPermissionsProfile(args, t.TempDir())
-	if !requested {
-		t.Fatal("requested = false, want true for an explicit with_additional_permissions call")
-	}
-	if err == nil {
-		t.Fatal("an empty additional_permissions payload was accepted; it must still be rejected")
-	}
-	assertNamesOmitRemedy(t, "empty payload", err.Error())
-}
-
-// A provider that materializes every optional property may send
-// "additional_permissions": null. That grants nothing and carries no flag, so it
-// is the field omitted — rejecting it stalled an ordinary command behind an
-// error the model could not act on.
-func TestExecuteToolCallTreatsNullAdditionalPermissionsAsOmitted(t *testing.T) {
-	result := runShellCall(t, t.TempDir(), `{"cmd":"git --version","additional_permissions":null}`)
-	if result.Status != tools.StatusOK {
-		t.Fatalf("null additional_permissions was rejected: status=%q output=%q", result.Status, result.Output)
-	}
-}
-
-// A null payload alongside the flag must still be rejected, and must land on
-// the same error as an absent payload rather than being quietly downgraded.
-func TestExecuteToolCallRejectsFlaggedNullAdditionalPermissions(t *testing.T) {
-	result := runShellCall(t, t.TempDir(),
-		`{"cmd":"git --version","sandbox_permissions":"with_additional_permissions","additional_permissions":null}`)
-	if result.Status != tools.StatusError {
-		t.Fatalf("flagged null status = %q, want error", result.Status)
-	}
-	if !strings.Contains(result.Output, "no additional_permissions object was provided") {
-		t.Fatalf("output = %q, want the missing-payload error", result.Output)
-	}
-	assertNamesOmitRemedy(t, "flagged null", result.Output)
-}
-
-func TestNormalizeProviderExpandedEmptyAdditionalPermissions(t *testing.T) {
-	for _, mode := range []string{
-		string(tools.SandboxPermissionsUseDefault),
-		string(tools.SandboxPermissionsWithAdditionalPermissions),
-	} {
-		args := map[string]any{
-			"command":             "./zero --version",
-			"sandbox_permissions": mode,
-			"additional_permissions": map[string]any{
-				"file_system": map[string]any{
-					"deny_read": []any{},
-					"entries":   []any{},
-					"read":      []any{},
-					"write":     []any{},
-				},
-				"network": map[string]any{"enabled": false},
-			},
-		}
-		normalizeNoopAdditionalPermissions(args, t.TempDir(), nil)
-		if _, exists := args["additional_permissions"]; exists {
-			t.Fatalf("mode %q retained empty additional_permissions: %#v", mode, args)
-		}
-		if got := args["sandbox_permissions"]; got != string(tools.SandboxPermissionsUseDefault) {
-			t.Fatalf("mode %q normalized to %q, want use_default", mode, got)
-		}
-	}
-}
-
-func TestExecuteToolCallNormalizesProviderExpandedEmptyAdditionalPermissions(t *testing.T) {
-	tool := &normalizationRecordingShellTool{}
-	registry := tools.NewRegistry()
-	registry.Register(tool)
-
-	result, err := executeToolCall(
-		context.Background(),
-		registry,
-		ToolCall{
-			ID:   "c1",
-			Name: "bash",
-			Arguments: `{"command":"./zero --version","sandbox_permissions":"with_additional_permissions",` +
-				`"additional_permissions":{"file_system":{"deny_read":[],"entries":[],"read":[],"write":[]},"network":{"enabled":false}}}`,
-		},
-		PermissionModeAuto,
-		Options{Cwd: t.TempDir()},
-	)
-	if err != nil {
-		t.Fatalf("executeToolCall: %v", err)
-	}
-	if result.Status != tools.StatusOK {
-		t.Fatalf("provider-expanded empty permissions were rejected: %s", result.Output)
-	}
-	if len(tool.calls) != 1 {
-		t.Fatalf("shell tool calls = %d, want 1", len(tool.calls))
-	}
-	args := tool.calls[0]
-	if _, exists := args["additional_permissions"]; exists {
-		t.Fatalf("executeToolCall retained empty additional_permissions: %#v", args)
-	}
-	if got := args["sandbox_permissions"]; got != string(tools.SandboxPermissionsUseDefault) {
-		t.Fatalf("sandbox mode = %q, want use_default", got)
-	}
-}
-
-func TestNormalizeAdditionalPermissionsPreservesRealRequest(t *testing.T) {
-	args := map[string]any{
-		"sandbox_permissions": string(tools.SandboxPermissionsWithAdditionalPermissions),
-		"additional_permissions": map[string]any{
-			"network": map[string]any{"enabled": true},
-		},
-	}
-	normalizeNoopAdditionalPermissions(args, t.TempDir(), nil)
-	if _, exists := args["additional_permissions"]; !exists {
-		t.Fatal("non-empty additional_permissions was removed")
-	}
-	if got := args["sandbox_permissions"]; got != string(tools.SandboxPermissionsWithAdditionalPermissions) {
-		t.Fatalf("sandbox mode changed to %q", got)
-	}
-}
-
-func TestNormalizeAdditionalPermissionsRemovesWorkspaceReadAlreadyCoveredBySandbox(t *testing.T) {
-	root := t.TempDir()
-	engine := sandbox.NewEngine(sandbox.EngineOptions{
-		WorkspaceRoot: root,
-		Policy:        sandbox.DefaultPolicy(),
-	})
-	args := map[string]any{
-		"command":             "./zero --version",
-		"sandbox_permissions": string(tools.SandboxPermissionsWithAdditionalPermissions),
-		"additional_permissions": map[string]any{
-			"file_system": map[string]any{
-				"entries": []any{
-					map[string]any{
-						"access": "read",
-						"path": map[string]any{
-							"type": "path",
-							"path": ".",
-						},
-					},
-				},
-				"deny_read": []any{},
-				"read":      []any{},
-				"write":     []any{},
-			},
-			"network": map[string]any{"enabled": false},
-		},
-	}
-
-	normalizeNoopAdditionalPermissions(args, root, engine)
-
-	if _, exists := args["additional_permissions"]; exists {
-		t.Fatalf("already-covered additional_permissions was retained: %#v", args)
-	}
-	if got := args["sandbox_permissions"]; got != string(tools.SandboxPermissionsUseDefault) {
-		t.Fatalf("sandbox mode changed to %q", got)
-	}
-}

internal/agent/ask_user_test.go

@@ -137,47 +137,6 @@ func TestRunAskUserHandlerErrorDegradesGracefully(t *testing.T) {
 	}
 }
 
-func TestRunAskUserCancellationAbortsRun(t *testing.T) {
-	registry := registryWithAskUser()
-	args := `{"questions":[{"question":"Which framework?"}]}`
-	provider := providerCallingAskUserThenAnswer(args, "done")
-	var toolResults []ToolResult
-
-	result, err := Run(context.Background(), "clarify", provider, Options{
-		Registry:     registry,
-		OnToolResult: func(result ToolResult) { toolResults = append(toolResults, result) },
-		OnAskUser: func(_ context.Context, _ AskUserRequest) (AskUserResponse, error) {
-			return AskUserResponse{}, context.Canceled
-		},
-	})
-
-	// A canceled prompt must abort with that error — NOT fabricate a headless
-	// answer and run on to a final answer.
-	if !errors.Is(err, context.Canceled) {
-		t.Fatalf("expected run to abort with context.Canceled, got err=%v answer=%q", err, result.FinalAnswer)
-	}
-	// The model must not be asked for a follow-up turn after cancellation.
-	if len(provider.requests) != 1 {
-		t.Fatalf("expected the run to stop after the canceled ask_user (1 turn), got %d", len(provider.requests))
-	}
-	if len(toolResults) != 1 || toolResults[0].ToolCallID == "" {
-		t.Fatalf("cancellation must emit exactly one result for the call, got %#v", toolResults)
-	}
-	// The recorded tool result must reflect cancellation, not a synthetic answer.
-	var toolMsg string
-	for _, m := range result.Messages {
-		if m.Role == zeroruntime.MessageRoleTool {
-			toolMsg = m.Content
-		}
-	}
-	if !strings.Contains(strings.ToLower(toolMsg), "canceled") {
-		t.Fatalf("expected a canceled tool result, got %q", toolMsg)
-	}
-	if strings.Contains(strings.ToLower(toolMsg), "no interactive user") {
-		t.Fatalf("must not fabricate a headless answer on cancellation, got %q", toolMsg)
-	}
-}
-
 func TestRunAskUserRedactsSecretsInAnswers(t *testing.T) {
 	registry := registryWithAskUser()
 	secret := "sk-ant-api03-ABCDEFGHIJKLMNOP1234567890"

internal/agent/async_diagnostics.go

@@ -1,185 +0,0 @@
-package agent
-
-import (
-	"context"
-	"path/filepath"
-	"sort"
-	"strings"
-	"sync"
-	"time"
-)
-
-// Post-edit LSP diagnostics used to run synchronously inside edit_file /
-// write_file: every edit blocked its tool result on a fresh-publish wait with
-// a quiet-period debounce (≥300ms floor that reset on each publish, 10s cap) —
-// the largest recurring latency tax in an edit-heavy session. Collection is
-// now asynchronous: a file is enqueued the moment a mutating tool finishes, a
-// single worker checks it while the rest of the tool batch (and any
-// self-correct verification) runs, and the loop drains completed results just
-// before building the NEXT provider request, appending errors as a user-role
-// nudge. The model always issues another request after an edit turn — it has
-// to read its tool results — so it still sees introduced errors at the same
-// decision point as before, without any tool call stalling on the language
-// server.
-//
-// A file re-edited before its check runs is checked once in its final state
-// (the checker re-reads the file); a file re-edited after its check completed
-// is re-enqueued and the newer result wins. When the worker is still busy at
-// drain time, the drain gives up after a short wait and the results are
-// delivered on the following turn instead — they stay accurate because any
-// further edit re-enqueues the file.
-
-// asyncDiagnosticsDrainTimeout bounds how long a turn waits on the in-flight
-// check before deferring delivery to the next turn. Most checks finish well
-// under it (debounce floor + analysis); a cold language server on a large
-// repo does not get to stall the loop the way the old inline 10s cap could.
-// A var so tests can shorten the wait.
-var asyncDiagnosticsDrainTimeout = 3 * time.Second
-
-// asyncDiagnosticsFinalDrainTimeout is the wait used when the run is about to
-// FINALIZE (natural completion or the max-turns summary): there is no later
-// turn to defer to, so the gate waits out the old inline-era budget rather
-// than silently dropping an error the last edit introduced. A var so tests
-// can shorten the wait.
-var asyncDiagnosticsFinalDrainTimeout = 10 * time.Second
-
-// asyncDiagnosticsNudge prefixes the drained diagnostics blocks; phrased like
-// the old inline block so the model reacts the same way.
-const asyncDiagnosticsNudge = "Diagnostics after your recent edits (fix any errors you introduced):\n"
-
-type asyncDiagnostics struct {
-	check         func(context.Context, string) string
-	workspaceRoot string
-
-	mu      sync.Mutex
-	queue   []string
-	queued  map[string]bool
-	results map[string]string
-	// working is non-nil while the worker goroutine runs and is closed when it
-	// exits, so drain can wait for quiescence without polling.
-	working chan struct{}
-}
-
-// newAsyncDiagnostics returns nil when check is nil, and every method on a nil
-// receiver is a no-op — callers wire it unconditionally.
-func newAsyncDiagnostics(check func(context.Context, string) string, workspaceRoot string) *asyncDiagnostics {
-	if check == nil {
-		return nil
-	}
-	return &asyncDiagnostics{
-		check:         check,
-		workspaceRoot: workspaceRoot,
-		queued:        map[string]bool{},
-		results:       map[string]string{},
-	}
-}
-
-// enqueue schedules changed files for a background check. Paths are
-// workspace-relative from Result.ChangedFiles (absolute when under a granted
-// extra write root), mirroring SelfCorrector's resolution.
-func (diagnostics *asyncDiagnostics) enqueue(ctx context.Context, files []string) {
-	if diagnostics == nil || len(files) == 0 {
-		return
-	}
-	diagnostics.mu.Lock()
-	defer diagnostics.mu.Unlock()
-	for _, file := range files {
-		path := diagnostics.absPath(file)
-		if diagnostics.queued[path] {
-			continue
-		}
-		diagnostics.queued[path] = true
-		// A completed result for this file describes a pre-edit state now.
-		delete(diagnostics.results, path)
-		diagnostics.queue = append(diagnostics.queue, path)
-	}
-	if diagnostics.working == nil && len(diagnostics.queue) > 0 {
-		done := make(chan struct{})
-		diagnostics.working = done
-		go diagnostics.work(ctx, done)
-	}
-}
-
-func (diagnostics *asyncDiagnostics) work(ctx context.Context, done chan struct{}) {
-	defer close(done)
-	for {
-		diagnostics.mu.Lock()
-		if len(diagnostics.queue) == 0 || ctx.Err() != nil {
-			diagnostics.working = nil
-			diagnostics.mu.Unlock()
-			return
-		}
-		path := diagnostics.queue[0]
-		diagnostics.queue = diagnostics.queue[1:]
-		// Un-mark before checking so an edit that lands DURING the check
-		// re-enqueues the file and it is checked again in its final state.
-		delete(diagnostics.queued, path)
-		diagnostics.mu.Unlock()
-
-		block := diagnostics.check(ctx, path)
-
-		diagnostics.mu.Lock()
-		if block != "" {
-			diagnostics.results[path] = block
-		} else {
-			delete(diagnostics.results, path)
-		}
-		diagnostics.mu.Unlock()
-	}
-}
-
-// drain waits briefly for the worker to go quiet, then formats and consumes
-// all completed error blocks as one nudge. Returns "" when there is nothing
-// to report or the worker is still busy (results then surface next turn).
-func (diagnostics *asyncDiagnostics) drain(ctx context.Context) string {
-	return diagnostics.drainWithin(ctx, asyncDiagnosticsDrainTimeout)
-}
-
-// drainFinal is drain with the finalization budget: called before the run's
-// last model request, where an undelivered result would otherwise be lost.
-func (diagnostics *asyncDiagnostics) drainFinal(ctx context.Context) string {
-	return diagnostics.drainWithin(ctx, asyncDiagnosticsFinalDrainTimeout)
-}
-
-func (diagnostics *asyncDiagnostics) drainWithin(ctx context.Context, timeout time.Duration) string {
-	if diagnostics == nil {
-		return ""
-	}
-	diagnostics.mu.Lock()
-	busy := diagnostics.working
-	diagnostics.mu.Unlock()
-	if busy != nil {
-		timer := time.NewTimer(timeout)
-		defer timer.Stop()
-		select {
-		case <-busy:
-		case <-timer.C:
-			return ""
-		case <-ctx.Done():
-			return ""
-		}
-	}
-	diagnostics.mu.Lock()
-	defer diagnostics.mu.Unlock()
-	if len(diagnostics.results) == 0 {
-		return ""
-	}
-	paths := make([]string, 0, len(diagnostics.results))
-	for path := range diagnostics.results {
-		paths = append(paths, path)
-	}
-	sort.Strings(paths)
-	blocks := make([]string, 0, len(paths))
-	for _, path := range paths {
-		blocks = append(blocks, diagnostics.results[path])
-	}
-	diagnostics.results = map[string]string{}
-	return asyncDiagnosticsNudge + strings.Join(blocks, "\n")
-}
-
-func (diagnostics *asyncDiagnostics) absPath(path string) string {
-	if filepath.IsAbs(path) {
-		return path
-	}
-	return filepath.Join(diagnostics.workspaceRoot, path)
-}

internal/agent/async_diagnostics_test.go

@@ -1,326 +0,0 @@
-package agent
-
-import (
-	"context"
-	"path/filepath"
-	"strings"
-	"sync"
-	"testing"
-	"time"
-
-	"github.com/Gitlawb/zero/internal/testutil"
-	"github.com/Gitlawb/zero/internal/tools"
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-func TestAsyncDiagnosticsNilCollectorNoOps(t *testing.T) {
-	var diagnostics *asyncDiagnostics
-	if diagnostics != newAsyncDiagnostics(nil, "/ws") {
-		t.Fatal("nil check must yield a nil collector")
-	}
-	diagnostics.enqueue(context.Background(), []string{"a.go"})
-	if nudge := diagnostics.drain(context.Background()); nudge != "" {
-		t.Fatalf("nil collector drain = %q, want empty", nudge)
-	}
-}
-
-func TestAsyncDiagnosticsCollectsAndDrainsOnce(t *testing.T) {
-	// A real absolute root: a literal "/ws" is not filepath.IsAbs on Windows
-	// (no drive letter), which is exactly what the assertions below check.
-	root := t.TempDir()
-	var mu sync.Mutex
-	var checked []string
-	check := func(_ context.Context, absPath string) string {
-		mu.Lock()
-		checked = append(checked, absPath)
-		mu.Unlock()
-		if filepath.Base(absPath) == "clean.go" {
-			return ""
-		}
-		return "ERR " + filepath.Base(absPath)
-	}
-	diagnostics := newAsyncDiagnostics(check, root)
-	diagnostics.enqueue(context.Background(), []string{"broken.go", "clean.go"})
-
-	nudge := diagnostics.drain(context.Background())
-	if !strings.HasPrefix(nudge, asyncDiagnosticsNudge) {
-		t.Fatalf("nudge missing prefix: %q", nudge)
-	}
-	if !strings.Contains(nudge, "ERR broken.go") || strings.Contains(nudge, "clean.go") {
-		t.Fatalf("nudge = %q, want broken.go errors only", nudge)
-	}
-	mu.Lock()
-	for _, path := range checked {
-		if !filepath.IsAbs(path) || !strings.HasPrefix(path, root+string(filepath.Separator)) {
-			t.Fatalf("check received %q, want path under workspace root %q", path, root)
-		}
-	}
-	mu.Unlock()
-	if second := diagnostics.drain(context.Background()); second != "" {
-		t.Fatalf("second drain = %q, want empty (results are consumed)", second)
-	}
-}
-
-// A check still running at drain time defers delivery to the next drain
-// instead of blocking the turn.
-func TestAsyncDiagnosticsSlowCheckDefersToNextDrain(t *testing.T) {
-	previous := asyncDiagnosticsDrainTimeout
-	asyncDiagnosticsDrainTimeout = 20 * time.Millisecond
-	defer func() { asyncDiagnosticsDrainTimeout = previous }()
-
-	release := make(chan struct{})
-	check := func(_ context.Context, absPath string) string {
-		<-release
-		return "ERR " + filepath.Base(absPath)
-	}
-	diagnostics := newAsyncDiagnostics(check, "/ws")
-	diagnostics.enqueue(context.Background(), []string{"slow.go"})
-
-	start := time.Now()
-	if nudge := diagnostics.drain(context.Background()); nudge != "" {
-		t.Fatalf("drain during in-flight check = %q, want empty", nudge)
-	}
-	if elapsed := time.Since(start); elapsed > time.Second {
-		t.Fatalf("drain blocked %v, want bounded by the (shortened) timeout", elapsed)
-	}
-
-	close(release)
-	deadline := time.Now().Add(2 * time.Second)
-	for {
-		if nudge := diagnostics.drain(context.Background()); nudge != "" {
-			if !strings.Contains(nudge, "ERR slow.go") {
-				t.Fatalf("deferred nudge = %q", nudge)
-			}
-			return
-		}
-		if time.Now().After(deadline) {
-			t.Fatal("deferred diagnostics never delivered")
-		}
-		time.Sleep(5 * time.Millisecond)
-	}
-}
-
-// Re-enqueueing a file after its check completed replaces the stale result.
-func TestAsyncDiagnosticsReEditReplacesResult(t *testing.T) {
-	var mu sync.Mutex
-	response := "ERR old"
-	check := func(context.Context, string) string {
-		mu.Lock()
-		defer mu.Unlock()
-		return response
-	}
-	diagnostics := newAsyncDiagnostics(check, "/ws")
-
-	diagnostics.enqueue(context.Background(), []string{"a.go"})
-	testutil.WaitFor(t, "worker idle", func() bool {
-		diagnostics.mu.Lock()
-		defer diagnostics.mu.Unlock()
-		return diagnostics.working == nil
-	})
-	mu.Lock()
-	response = "ERR new"
-	mu.Unlock()
-	diagnostics.enqueue(context.Background(), []string{"a.go"})
-
-	nudge := diagnostics.drain(context.Background())
-	if !strings.Contains(nudge, "ERR new") || strings.Contains(nudge, "ERR old") {
-		t.Fatalf("nudge = %q, want only the re-check result", nudge)
-	}
-}
-
-// changedFilesTool is a fake mutating tool reporting a changed file without
-// touching the filesystem.
-type changedFilesTool struct{}
-
-func (changedFilesTool) Name() string        { return "fake_edit" }
-func (changedFilesTool) Description() string { return "test mutating tool" }
-func (changedFilesTool) Parameters() tools.Schema {
-	return tools.Schema{Type: "object", Properties: map[string]tools.PropertySchema{}}
-}
-func (changedFilesTool) Safety() tools.Safety {
-	return tools.Safety{SideEffect: tools.SideEffectWrite, Permission: tools.PermissionAllow, Reason: "test"}
-}
-func (changedFilesTool) Run(context.Context, map[string]any) tools.Result {
-	return tools.Result{Status: tools.StatusOK, Output: "edited", ChangedFiles: []string{"main.go"}}
-}
-
-// End-to-end through Run: an edit turn does NOT carry diagnostics in the tool
-// result (the old inline path), but the next request contains the background
-// diagnostics nudge, before the model finalizes.
-func TestRunDeliversAsyncDiagnosticsNudgeNextTurn(t *testing.T) {
-	registry := tools.NewRegistry()
-	registry.Register(changedFilesTool{})
-	provider := &mockProvider{
-		turns: [][]zeroruntime.StreamEvent{
-			{
-				{Type: zeroruntime.StreamEventToolCallStart, ToolCallID: "call-1", ToolName: "fake_edit"},
-				{Type: zeroruntime.StreamEventToolCallDelta, ToolCallID: "call-1", ArgumentsFragment: `{}`},
-				{Type: zeroruntime.StreamEventToolCallEnd, ToolCallID: "call-1"},
-				{Type: zeroruntime.StreamEventDone},
-			},
-			{
-				{Type: zeroruntime.StreamEventText, Content: "done"},
-				{Type: zeroruntime.StreamEventDone},
-			},
-		},
-	}
-	root := t.TempDir()
-	var checkedPath string
-	var mu sync.Mutex
-
-	result, err := Run(context.Background(), "fix main.go", provider, Options{
-		Registry: registry,
-		Cwd:      root,
-		FileDiagnostics: func(_ context.Context, absPath string) string {
-			mu.Lock()
-			checkedPath = absPath
-			mu.Unlock()
-			return "main.go:1:1 error: boom"
-		},
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.FinalAnswer != "done" {
-		t.Fatalf("final answer = %q", result.FinalAnswer)
-	}
-	if len(provider.requests) != 2 {
-		t.Fatalf("expected 2 provider turns, got %d", len(provider.requests))
-	}
-
-	// The tool result itself must NOT block on / embed diagnostics.
-	for _, message := range provider.requests[1].Messages {
-		if message.Role == zeroruntime.MessageRoleTool && strings.Contains(message.Content, "boom") {
-			t.Fatalf("diagnostics leaked into the tool result: %q", message.Content)
-		}
-	}
-	// The nudge must be present in the second request as a user message.
-	found := false
-	for _, message := range provider.requests[1].Messages {
-		if message.Role == zeroruntime.MessageRoleUser && strings.HasPrefix(message.Content, asyncDiagnosticsNudge) {
-			if !strings.Contains(message.Content, "boom") {
-				t.Fatalf("nudge missing diagnostics: %q", message.Content)
-			}
-			found = true
-		}
-	}
-	if !found {
-		t.Fatal("no async diagnostics nudge in the follow-up request")
-	}
-	mu.Lock()
-	defer mu.Unlock()
-	if want := filepath.Join(root, "main.go"); checkedPath != want {
-		t.Fatalf("checked path = %q, want %q", checkedPath, want)
-	}
-}
-
-// When the run hits the maxTurns ceiling right after an edit turn, the
-// final-answer request must still carry the diagnostics nudge — otherwise an
-// error introduced by the last edit would go unreported in the summary.
-func TestRunDrainsAsyncDiagnosticsBeforeMaxTurnsFinalAnswer(t *testing.T) {
-	registry := tools.NewRegistry()
-	registry.Register(changedFilesTool{})
-	provider := &mockProvider{
-		turns: [][]zeroruntime.StreamEvent{
-			{
-				{Type: zeroruntime.StreamEventToolCallStart, ToolCallID: "call-1", ToolName: "fake_edit"},
-				{Type: zeroruntime.StreamEventToolCallDelta, ToolCallID: "call-1", ArgumentsFragment: `{}`},
-				{Type: zeroruntime.StreamEventToolCallEnd, ToolCallID: "call-1"},
-				{Type: zeroruntime.StreamEventDone},
-			},
-			{
-				{Type: zeroruntime.StreamEventText, Content: "summary"},
-				{Type: zeroruntime.StreamEventDone},
-			},
-		},
-	}
-
-	result, err := Run(context.Background(), "fix main.go", provider, Options{
-		Registry: registry,
-		Cwd:      t.TempDir(),
-		MaxTurns: 1,
-		FileDiagnostics: func(context.Context, string) string {
-			return "main.go:1:1 error: boom"
-		},
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.FinalAnswer != "summary" {
-		t.Fatalf("final answer = %q", result.FinalAnswer)
-	}
-	if len(provider.requests) != 2 {
-		t.Fatalf("expected the max-turns final-answer request, got %d requests", len(provider.requests))
-	}
-	found := false
-	for _, message := range provider.requests[1].Messages {
-		if message.Role == zeroruntime.MessageRoleUser && strings.HasPrefix(message.Content, asyncDiagnosticsNudge) {
-			found = true
-		}
-	}
-	if !found {
-		t.Fatal("max-turns final-answer request missing the diagnostics nudge")
-	}
-}
-
-// When the model finalizes while a slow check is still in flight (the
-// per-turn drain missed it), the finalization gate must wait it out and give
-// the model one more turn with the nudge instead of dropping the errors.
-func TestRunFinalizationGateDeliversLateDiagnostics(t *testing.T) {
-	previous := asyncDiagnosticsDrainTimeout
-	asyncDiagnosticsDrainTimeout = time.Millisecond
-	defer func() { asyncDiagnosticsDrainTimeout = previous }()
-
-	registry := tools.NewRegistry()
-	registry.Register(changedFilesTool{})
-	provider := &mockProvider{
-		turns: [][]zeroruntime.StreamEvent{
-			{
-				{Type: zeroruntime.StreamEventToolCallStart, ToolCallID: "call-1", ToolName: "fake_edit"},
-				{Type: zeroruntime.StreamEventToolCallDelta, ToolCallID: "call-1", ArgumentsFragment: `{}`},
-				{Type: zeroruntime.StreamEventToolCallEnd, ToolCallID: "call-1"},
-				{Type: zeroruntime.StreamEventDone},
-			},
-			{
-				{Type: zeroruntime.StreamEventText, Content: "done"},
-				{Type: zeroruntime.StreamEventDone},
-			},
-			{
-				{Type: zeroruntime.StreamEventText, Content: "done after fix"},
-				{Type: zeroruntime.StreamEventDone},
-			},
-		},
-	}
-
-	result, err := Run(context.Background(), "fix main.go", provider, Options{
-		Registry: registry,
-		Cwd:      t.TempDir(),
-		FileDiagnostics: func(context.Context, string) string {
-			// Slower than the (shortened) per-turn drain, well under the
-			// finalization budget.
-			time.Sleep(100 * time.Millisecond)
-			return "main.go:1:1 error: boom"
-		},
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.FinalAnswer != "done after fix" {
-		t.Fatalf("final answer = %q, want the post-nudge answer", result.FinalAnswer)
-	}
-	if len(provider.requests) != 3 {
-		t.Fatalf("expected a third request carrying the late nudge, got %d requests", len(provider.requests))
-	}
-	found := false
-	for _, message := range provider.requests[2].Messages {
-		if message.Role == zeroruntime.MessageRoleUser && strings.HasPrefix(message.Content, asyncDiagnosticsNudge) {
-			if !strings.Contains(message.Content, "boom") {
-				t.Fatalf("nudge missing diagnostics: %q", message.Content)
-			}
-			found = true
-		}
-	}
-	if !found {
-		t.Fatal("finalization gate did not deliver the late diagnostics nudge")
-	}
-}

internal/agent/command_prefix.go

@@ -1,503 +0,0 @@
-package agent
-
-import (
-	"fmt"
-	"runtime"
-	"strings"
-
-	"github.com/Gitlawb/zero/internal/sandbox"
-	"github.com/Gitlawb/zero/internal/tools"
-	"mvdan.cc/sh/v3/syntax"
-)
-
-func proposedCommandPrefix(toolName string, args map[string]any) []string {
-	if !isShellCommandTool(toolName) {
-		return nil
-	}
-	command, ok := firstStringArg(args, "command", "cmd", "script", "shell")
-	if !ok {
-		return nil
-	}
-	segments, ok := safeShellCommandSegments(command)
-	if !ok {
-		return nil
-	}
-	if requested, ok := requestedPrefixRule(args); ok {
-		if safeRequestedPrefixForSegments(requested, segments) {
-			return requested
-		}
-		return nil
-	}
-	// Only propose approving a prefix of one segment when every other segment
-	// in the command is independently known-safe. Once a prefix is approved,
-	// shellExecutionArgsForApproval escalates the whole command (every
-	// segment, not just the approved one) to bypass the sandbox, so offering a
-	// prefix that leaves an MSYS-prone (or otherwise unsafe) segment uncovered
-	// would let that segment run unsandboxed without ever being reviewed.
-	for index, tokens := range segments {
-		if knownSafeCommandSegment(tokens) {
-			continue
-		}
-		if !sandbox.ValidCommandPrefix(tokens) || !otherSegmentsKnownSafe(segments, index) {
-			return nil
-		}
-		return append([]string(nil), tokens...)
-	}
-	if len(segments) == 0 || !sandbox.ValidCommandPrefix(segments[0]) {
-		return nil
-	}
-	return append([]string(nil), segments[0]...)
-}
-
-// otherSegmentsKnownSafe reports whether every segment other than the one at
-// skip is known-safe on its own.
-func otherSegmentsKnownSafe(segments [][]string, skip int) bool {
-	for index, tokens := range segments {
-		if index == skip {
-			continue
-		}
-		if !knownSafeCommandSegment(tokens) {
-			return false
-		}
-	}
-	return true
-}
-
-func matchCommandPrefix(toolName string, args map[string]any, options Options) (sandbox.CommandPrefixGrant, bool, bool) {
-	if !isShellCommandTool(toolName) || options.Sandbox == nil {
-		return sandbox.CommandPrefixGrant{}, false, false
-	}
-	if shellCommandAdditionalPermissionsRequested(args) {
-		return sandbox.CommandPrefixGrant{}, false, false
-	}
-	command, ok := firstStringArg(args, "command", "cmd", "script", "shell")
-	if !ok {
-		return sandbox.CommandPrefixGrant{}, false, false
-	}
-	segments, ok := safeShellCommandSegments(command)
-	if !ok {
-		return sandbox.CommandPrefixGrant{}, false, false
-	}
-	var matched sandbox.CommandPrefixGrant
-	matchedAny := false
-	matchedSession := false
-	for _, tokens := range segments {
-		if grant, ok := options.Sandbox.LookupCommandPrefix(toolName, tokens); ok {
-			if !matchedAny {
-				matched = grant
-			}
-			matchedAny = true
-			continue
-		}
-		if grant, ok := options.Sandbox.LookupCommandPrefixForSession(toolName, tokens); ok {
-			if !matchedAny {
-				matched = grant
-			}
-			matchedAny = true
-			matchedSession = true
-			continue
-		}
-		if knownSafeCommandSegment(tokens) {
-			continue
-		}
-		return sandbox.CommandPrefixGrant{}, false, false
-	}
-	if matchedAny {
-		return matched, true, matchedSession
-	}
-	return sandbox.CommandPrefixGrant{}, false, false
-}
-
-func shellExecutionArgsForApproval(toolName string, args map[string]any, action PermissionDecisionAction, options Options) map[string]any {
-	if !isShellCommandTool(toolName) || !shellPrefixApprovalBypassesSandbox(action) {
-		return args
-	}
-	if options.Sandbox == nil || !options.Sandbox.UnsandboxedExecutionAllowed() {
-		return args
-	}
-	if shellCommandAdditionalPermissionsRequested(args) || shellCommandRequiresEscalated(args) {
-		return args
-	}
-	planned := cloneArgs(args)
-	if planned == nil {
-		planned = map[string]any{}
-	}
-	planned["sandbox_permissions"] = string(tools.SandboxPermissionsRequireEscalated)
-	return planned
-}
-
-func shellPrefixApprovalBypassesSandbox(action PermissionDecisionAction) bool {
-	return action == PermissionDecisionAllowPrefix || action == PermissionDecisionAlwaysAllowPrefix
-}
-
-func shellCommandRequiresEscalated(args map[string]any) bool {
-	raw, ok := args["sandbox_permissions"]
-	if !ok || raw == nil {
-		return false
-	}
-	value, ok := raw.(string)
-	if !ok {
-		value = fmt.Sprint(raw)
-	}
-	return strings.TrimSpace(value) == string(tools.SandboxPermissionsRequireEscalated)
-}
-
-func isShellCommandTool(toolName string) bool {
-	return toolName == "bash" || toolName == "exec_command"
-}
-
-func firstStringArg(args map[string]any, names ...string) (string, bool) {
-	for _, name := range names {
-		if raw, ok := args[name].(string); ok {
-			value := strings.TrimSpace(raw)
-			if value != "" {
-				return value, true
-			}
-		}
-	}
-	return "", false
-}
-
-func requestedPrefixRule(args map[string]any) ([]string, bool) {
-	raw, ok := args["prefix_rule"]
-	if !ok {
-		return nil, false
-	}
-	switch value := raw.(type) {
-	case []string:
-		return cleanPrefixRule(value), true
-	case []any:
-		out := make([]string, 0, len(value))
-		for _, item := range value {
-			part, ok := item.(string)
-			if !ok {
-				return nil, true
-			}
-			out = append(out, part)
-		}
-		return cleanPrefixRule(out), true
-	default:
-		return nil, true
-	}
-}
-
-func cleanPrefixRule(prefix []string) []string {
-	cleaned := make([]string, 0, len(prefix))
-	for _, part := range prefix {
-		part = strings.TrimSpace(part)
-		if part == "" {
-			return nil
-		}
-		cleaned = append(cleaned, part)
-	}
-	return cleaned
-}
-
-func safeRequestedPrefixForSegments(prefix []string, segments [][]string) bool {
-	if len(prefix) == 0 || !sandbox.ValidCommandPrefix(prefix) {
-		return false
-	}
-	matched := false
-	for _, command := range segments {
-		if len(prefix) > len(command) {
-			if knownSafeCommandSegment(command) {
-				continue
-			}
-			return false
-		}
-		if hasStringPrefix(command, prefix) {
-			matched = true
-			continue
-		}
-		if knownSafeCommandSegment(command) {
-			continue
-		}
-		return false
-	}
-	return matched
-}
-
-func safeShellCommandSegments(command string) ([][]string, bool) {
-	command = strings.TrimSpace(command)
-	if command == "" {
-		return nil, false
-	}
-	file, err := syntax.NewParser().Parse(strings.NewReader(command), "")
-	if err != nil || len(file.Stmts) == 0 {
-		return nil, false
-	}
-	segments := make([][]string, 0, len(file.Stmts))
-	for _, stmt := range file.Stmts {
-		if !collectSafeShellStatement(stmt, &segments) {
-			return nil, false
-		}
-	}
-	if len(segments) == 0 {
-		return nil, false
-	}
-	return segments, true
-}
-
-func collectSafeShellStatement(stmt *syntax.Stmt, segments *[][]string) bool {
-	if stmt == nil || stmt.Negated || stmt.Background || stmt.Coprocess || stmt.Disown || len(stmt.Redirs) > 0 {
-		return false
-	}
-	return collectSafeShellCommand(stmt.Cmd, segments)
-}
-
-func collectSafeShellCommand(cmd syntax.Command, segments *[][]string) bool {
-	switch node := cmd.(type) {
-	case *syntax.CallExpr:
-		tokens, ok := literalCallTokens(node)
-		if !ok {
-			return false
-		}
-		*segments = append(*segments, tokens)
-		return true
-	case *syntax.BinaryCmd:
-		switch node.Op {
-		case syntax.AndStmt, syntax.OrStmt, syntax.Pipe:
-		default:
-			return false
-		}
-		return collectSafeShellStatement(node.X, segments) && collectSafeShellStatement(node.Y, segments)
-	default:
-		return false
-	}
-}
-
-func literalCallTokens(call *syntax.CallExpr) ([]string, bool) {
-	if call == nil || len(call.Assigns) > 0 || len(call.Args) == 0 {
-		return nil, false
-	}
-	tokens := make([]string, 0, len(call.Args))
-	for _, word := range call.Args {
-		if len(word.Parts) != 1 {
-			return nil, false
-		}
-		lit, ok := word.Parts[0].(*syntax.Lit)
-		if !ok || strings.ContainsAny(lit.Value, "*?[]{}") {
-			return nil, false
-		}
-		tokens = append(tokens, lit.Value)
-	}
-	return tokens, true
-}
-
-func knownSafeCommandSegment(command []string) bool {
-	if len(command) == 0 {
-		return false
-	}
-	name := commandName(command[0])
-	if runtime.GOOS == "windows" && tools.MsysProneCommandName(name) {
-		return false
-	}
-	switch name {
-	case "cat", "cd", "cut", "echo", "expr", "false", "grep", "head", "id",
-		"ls", "nl", "paste", "pwd", "rev", "seq", "stat", "tail", "tr",
-		"true", "uname", "uniq", "wc", "which", "whoami":
-		return true
-	case "base64":
-		return safeBase64Command(command[1:])
-	case "find":
-		return safeFindCommand(command[1:])
-	case "rg":
-		return safeRipgrepCommand(command[1:])
-	case "sed":
-		return safeSedCommand(command[1:])
-	case "git":
-		return safeGitCommand(command)
-	default:
-		return false
-	}
-}
-
-func safeBase64Command(args []string) bool {
-	for _, arg := range args {
-		if arg == "-o" || arg == "--output" || strings.HasPrefix(arg, "--output=") || (strings.HasPrefix(arg, "-o") && arg != "-o") {
-			return false
-		}
-	}
-	return true
-}
-
-func safeFindCommand(args []string) bool {
-	unsafe := map[string]bool{
-		"-exec": true, "-execdir": true, "-ok": true, "-okdir": true,
-		"-delete": true,
-		"-fls":    true, "-fprint": true, "-fprint0": true, "-fprintf": true,
-	}
-	for _, arg := range args {
-		if unsafe[arg] {
-			return false
-		}
-	}
-	return true
-}
-
-func safeRipgrepCommand(args []string) bool {
-	for _, arg := range args {
-		if arg == "--search-zip" || arg == "-z" || arg == "--pre" || arg == "--hostname-bin" ||
-			strings.HasPrefix(arg, "--pre=") || strings.HasPrefix(arg, "--hostname-bin=") {
-			return false
-		}
-	}
-	return true
-}
-
-func safeSedCommand(args []string) bool {
-	if len(args) < 2 || len(args) > 3 || args[0] != "-n" {
-		return false
-	}
-	return validSedPrintArg(args[1])
-}
-
-func validSedPrintArg(arg string) bool {
-	if !strings.HasSuffix(arg, "p") {
-		return false
-	}
-	body := strings.TrimSuffix(arg, "p")
-	if body == "" {
-		return false
-	}
-	for _, part := range strings.Split(body, ",") {
-		if part == "" {
-			return false
-		}
-		for _, r := range part {
-			if r < '0' || r > '9' {
-				return false
-			}
-		}
-	}
-	return true
-}
-
-func safeGitCommand(command []string) bool {
-	subIndex, subcommand, ok := gitSubcommand(command)
-	if !ok {
-		return false
-	}
-	if gitHasUnsafeGlobalOption(command[1:subIndex]) {
-		return false
-	}
-	args := command[subIndex+1:]
-	switch subcommand {
-	case "status", "log", "diff", "show":
-		return gitArgsReadOnly(args)
-	case "branch":
-		return gitArgsReadOnly(args) && gitBranchReadOnly(args)
-	default:
-		return false
-	}
-}
-
-func gitSubcommand(command []string) (int, string, bool) {
-	for index := 1; index < len(command); index++ {
-		arg := command[index]
-		if gitOptionConsumesValue(arg) {
-			index++
-			continue
-		}
-		if gitOptionHasInlineValue(arg) || arg == "--" || strings.HasPrefix(arg, "-") {
-			continue
-		}
-		switch arg {
-		case "status", "log", "diff", "show", "branch":
-			return index, arg, true
-		default:
-			return 0, "", false
-		}
-	}
-	return 0, "", false
-}
-
-func gitOptionConsumesValue(arg string) bool {
-	switch arg {
-	case "-C", "-c", "--config-env", "--exec-path", "--git-dir", "--namespace", "--super-prefix", "--work-tree":
-		return true
-	default:
-		return false
-	}
-}
-
-func gitOptionHasInlineValue(arg string) bool {
-	return strings.HasPrefix(arg, "--config-env=") ||
-		strings.HasPrefix(arg, "--exec-path=") ||
-		strings.HasPrefix(arg, "--git-dir=") ||
-		strings.HasPrefix(arg, "--namespace=") ||
-		strings.HasPrefix(arg, "--super-prefix=") ||
-		strings.HasPrefix(arg, "--work-tree=") ||
-		((strings.HasPrefix(arg, "-C") || strings.HasPrefix(arg, "-c")) && len(arg) > 2)
-}
-
-func gitHasUnsafeGlobalOption(args []string) bool {
-	for index := 0; index < len(args); index++ {
-		arg := args[index]
-		switch {
-		case strings.HasPrefix(arg, "--upload-pack"):
-			return true
-		case arg == "-C" || strings.HasPrefix(arg, "-C"):
-			return true
-		case gitOptionConsumesValue(arg):
-			index++
-		}
-	}
-	return false
-}
-
-func gitArgsReadOnly(args []string) bool {
-	for _, arg := range args {
-		switch {
-		case strings.HasPrefix(arg, "--output="), strings.HasPrefix(arg, "--exec="):
-			return false
-		case arg == "--output", arg == "--exec":
-			return false
-		}
-	}
-	return true
-}
-
-func gitBranchReadOnly(args []string) bool {
-	if len(args) == 0 {
-		return true
-	}
-	for _, arg := range args {
-		if strings.HasPrefix(arg, "--format=") {
-			continue
-		}
-		switch arg {
-		case "--list", "-l", "--show-current", "-a", "--all", "-r", "--remotes", "-v", "-vv", "--verbose":
-			continue
-		default:
-			return false
-		}
-	}
-	return true
-}
-
-func commandName(raw string) string {
-	name := strings.TrimSpace(raw)
-	if index := strings.LastIndexAny(name, `/\`); index >= 0 {
-		name = name[index+1:]
-	}
-	name = strings.ToLower(name)
-	for _, suffix := range []string{".exe", ".cmd", ".bat", ".com"} {
-		if strings.HasSuffix(name, suffix) {
-			return strings.TrimSuffix(name, suffix)
-		}
-	}
-	return name
-}
-
-func hasStringPrefix(values []string, prefix []string) bool {
-	if len(prefix) == 0 || len(prefix) > len(values) {
-		return false
-	}
-	for index := range prefix {
-		if values[index] != prefix[index] {
-			return false
-		}
-	}
-	return true
-}

internal/agent/command_prefix_test.go

@@ -1,233 +0,0 @@
-package agent
-
-import (
-	"runtime"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/sandbox"
-	"github.com/Gitlawb/zero/internal/tools"
-)
-
-func TestProposedCommandPrefixUsesSafeSimpleCommands(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{"command": "go test ./..."})
-	want := []string{"go", "test", "./..."}
-	if !equalStringSlices(got, want) {
-		t.Fatalf("prefix = %#v, want %#v", got, want)
-	}
-}
-
-func TestProposedCommandPrefixSupportsExecCommand(t *testing.T) {
-	got := proposedCommandPrefix("exec_command", map[string]any{"cmd": "go test ./..."})
-	want := []string{"go", "test", "./..."}
-	if !equalStringSlices(got, want) {
-		t.Fatalf("prefix = %#v, want %#v", got, want)
-	}
-}
-
-func TestProposedCommandPrefixHonorsValidatedRequestedPrefix(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{
-		"command":     "git status --short",
-		"prefix_rule": []any{"git", "status"},
-	})
-	want := []string{"git", "status"}
-	if !equalStringSlices(got, want) {
-		t.Fatalf("prefix = %#v, want %#v", got, want)
-	}
-}
-
-func TestProposedCommandPrefixSupportsSegmentedCommands(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{"command": "ps aux | head -5"})
-	if runtime.GOOS == "windows" {
-		// head is MSYS-prone on Windows (#458), so proposedCommandPrefix must
-		// not offer "ps aux" as a reusable prefix here: approving it would
-		// escalate the whole command, including the uncovered head segment,
-		// to bypass the sandbox unreviewed. See
-		// TestProposedCommandPrefixRejectsPrefixLeavingUnsafeTailUncovered for
-		// the platform-independent regression coverage of this behavior.
-		if got != nil {
-			t.Fatalf("expected no prefix on Windows because head is MSYS-prone, got %#v", got)
-		}
-		return
-	}
-	want := []string{"ps", "aux"}
-	if !equalStringSlices(got, want) {
-		t.Fatalf("prefix = %#v, want %#v", got, want)
-	}
-}
-
-// TestProposedCommandPrefixRejectsPrefixLeavingUnsafeTailUncovered guards
-// against proposedCommandPrefix offering to approve one segment of a
-// multi-segment command (e.g. "ps aux") while a different segment (e.g. "npm
-// install") is not known-safe. shellExecutionArgsForApproval escalates the
-// entire command once any prefix is approved, so an uncovered unsafe segment
-// would bypass the sandbox unreviewed. Uses npm, which is never known-safe on
-// any platform, so the assertion does not depend on runtime.GOOS.
-func TestProposedCommandPrefixRejectsPrefixLeavingUnsafeTailUncovered(t *testing.T) {
-	if got := proposedCommandPrefix("bash", map[string]any{"command": "ps aux && npm install"}); got != nil {
-		t.Fatalf("expected no prefix because npm segment is not known-safe, got %#v", got)
-	}
-}
-
-func TestProposedCommandPrefixHonorsRequestedPrefixAcrossSegments(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{
-		"command":     "git status --short && git status --branch",
-		"prefix_rule": []any{"git", "status"},
-	})
-	want := []string{"git", "status"}
-	if !equalStringSlices(got, want) {
-		t.Fatalf("prefix = %#v, want %#v", got, want)
-	}
-}
-
-func TestProposedCommandPrefixRejectsRequestedPrefixThatDoesNotCoverSegments(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{
-		"command":     "ps aux && npm install",
-		"prefix_rule": []any{"ps", "aux"},
-	})
-	if got != nil {
-		t.Fatalf("partial requested prefix should be rejected, got %#v", got)
-	}
-}
-
-func TestProposedCommandPrefixRejectsUnsafeRequestedPrefix(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{
-		"command":     "git status --short",
-		"prefix_rule": []any{"git"},
-	})
-	if got != nil {
-		t.Fatalf("broad requested prefix should be rejected, got %#v", got)
-	}
-}
-
-// The launcher denylist is only worth anything if it holds on the path a user
-// actually sees. A model naming its own prefix_rule is that path: before
-// launcher names were normalized, "python3.11" was offered as a one-token
-// grant, and hasStringPrefix then matched every later python3.11 invocation.
-func TestProposedCommandPrefixRejectsLauncherSpellingsInRequestedPrefix(t *testing.T) {
-	for _, testCase := range []struct {
-		command string
-		rule    []any
-	}{
-		{"python3.11 script.py", []any{"python3.11"}},
-		{"python.exe script.py", []any{"python.exe"}},
-		{"node.exe app.js", []any{"node.exe"}},
-		{"cmd /c whoami", []any{"cmd"}},
-		{"busybox sh -c id", []any{"busybox"}},
-		{"uv run main.py", []any{"uv", "run"}},
-		{"python3.11 -c import_os", []any{"python3.11", "-c"}},
-	} {
-		got := proposedCommandPrefix("bash", map[string]any{
-			"command":     testCase.command,
-			"prefix_rule": testCase.rule,
-		})
-		if got != nil {
-			t.Errorf("prefix_rule %v for %q was offered as %#v, want rejected", testCase.rule, testCase.command, got)
-		}
-	}
-}
-
-func TestProposedCommandPrefixStillOffersOrdinaryCommands(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{
-		"command":     "cargo build --release",
-		"prefix_rule": []any{"cargo", "build"},
-	})
-	if len(got) != 2 || got[0] != "cargo" || got[1] != "build" {
-		t.Fatalf("ordinary prefix rule = %#v, want [cargo build]", got)
-	}
-}
-
-func TestProposedCommandPrefixRejectsUnsafeShellForms(t *testing.T) {
-	cases := []string{
-		"cat < in > out",
-		"FOO=bar go test",
-		"echo $(whoami)",
-		"cat *.go",
-		"bash -lc go test",
-	}
-	for _, command := range cases {
-		t.Run(command, func(t *testing.T) {
-			if got := proposedCommandPrefix("bash", map[string]any{"command": command}); got != nil {
-				t.Fatalf("unsafe command got prefix %#v", got)
-			}
-		})
-	}
-}
-
-func TestProposedCommandPrefixRejectsUnsafeLaunchers(t *testing.T) {
-	cases := []string{
-		"find . -type f",
-		"xargs rm -rf /tmp/x",
-		"timeout 5 go test ./...",
-		"nice go test ./...",
-		"nohup go test ./...",
-		"watch ls",
-		"ssh host ls",
-		"make test",
-		"npm run dev",
-		"command git status",
-		"eval echo hi",
-		"exec echo hi",
-		"python script.py",
-		"node script.js",
-		"./script.sh --flag",
-		"/tmp/script.sh --flag",
-	}
-	for _, command := range cases {
-		t.Run(command, func(t *testing.T) {
-			if got := proposedCommandPrefix("bash", map[string]any{"command": command}); got != nil {
-				t.Fatalf("unsafe launcher got prefix %#v", got)
-			}
-		})
-	}
-}
-
-func TestMatchCommandPrefixCoversSegmentedCommandWithSafeTail(t *testing.T) {
-	engine := sandbox.NewEngine(sandbox.EngineOptions{WorkspaceRoot: t.TempDir()})
-	engine.GrantCommandPrefixForSession("bash", []string{"ps", "aux"})
-	// head is MSYS-prone on Windows (#458) and must not count as a known-safe tail.
-	command := "ps aux | head -5"
-	if runtime.GOOS == "windows" {
-		command = "ps aux | echo ok"
-	}
-
-	grant, ok, session := matchCommandPrefix("bash", map[string]any{"command": command}, Options{Sandbox: engine})
-	if !ok || !session || !equalStringSlices(grant.Prefix, []string{"ps", "aux"}) {
-		t.Fatalf("match = %#v ok=%v session=%v, want session ps aux prefix", grant, ok, session)
-	}
-}
-
-func TestKnownSafeCommandSegmentRejectsMsysProneOnWindows(t *testing.T) {
-	if runtime.GOOS != "windows" {
-		t.Skip("windows-only known-safe MSYS guard")
-	}
-	for _, command := range [][]string{{"head", "-5"}, {"cat", "file.txt"}, {"grep", "pat"}} {
-		if knownSafeCommandSegment(command) {
-			t.Fatalf("expected %q to be unsafe on Windows, got known-safe", command)
-		}
-	}
-	if !knownSafeCommandSegment([]string{"echo", "ok"}) {
-		t.Fatal("expected echo to remain known-safe on Windows")
-	}
-	if !tools.MsysProneCommandName("head") {
-		t.Fatal("expected head to be MSYS-prone")
-	}
-}
-
-func TestMatchCommandPrefixRejectsUncoveredSegment(t *testing.T) {
-	engine := sandbox.NewEngine(sandbox.EngineOptions{WorkspaceRoot: t.TempDir()})
-	engine.GrantCommandPrefixForSession("bash", []string{"ps", "aux"})
-
-	if grant, ok, session := matchCommandPrefix("bash", map[string]any{"command": "ps aux && npm install"}, Options{Sandbox: engine}); ok {
-		t.Fatalf("match = %#v session=%v, want no match because npm segment is uncovered", grant, session)
-	}
-}
-
-func TestProposedCommandPrefixRejectsRequestedUnsafeLauncherPrefix(t *testing.T) {
-	got := proposedCommandPrefix("bash", map[string]any{
-		"command":     "find . -type f",
-		"prefix_rule": []any{"find", "."},
-	})
-	if got != nil {
-		t.Fatalf("unsafe requested launcher prefix should be rejected, got %#v", got)
-	}
-}

internal/agent/compaction.go

@@ -2,13 +2,9 @@ package agent
 
 import (
 	"context"
-	"encoding/json"
 	"errors"
-	"strconv"
 	"strings"
-	"unicode/utf8"
 
-	"github.com/Gitlawb/zero/internal/trace"
 	"github.com/Gitlawb/zero/internal/zeroruntime"
 )
 
@@ -24,30 +20,22 @@ import (
 // the agent loop owns the provider wiring.
 
 // defaultCompactionPreserveLast is how many trailing messages are kept verbatim
-// when the caller does not specify a preserve count. Kept in sync with the replay
-// reconstruction default in internal/sessions/replay.go.
-const defaultCompactionPreserveLast = 6
+// when the caller does not specify a preserve count.
+const defaultCompactionPreserveLast = 8
 
 // compactionTriggerRatio is the fraction of the context window at which
-// proactive compaction kicks in (top of each turn). NOTE: this is speculative
-// tuning — validate against the per-turn latency/compaction metrics (roadmap 5.2)
-// before trusting it. Measured fixed overhead is ~7.4k tokens (not the ~16k the
-// roadmap assumed), so context fills slower; if data shows 0.7 triggers redundant
-// summarization, raise it back toward 0.8.
-const compactionTriggerRatio = 0.7
+// proactive compaction kicks in (top of each turn).
+const compactionTriggerRatio = 0.8
 
 // summaryLabel prefixes the injected summary so it is unmistakable in the
 // transcript (and so tests can assert on it).
 const summaryLabel = "[Summary of earlier conversation]"
 
-// CompactionSummaryInstructions is the system prompt handed to both automatic
-// and manually requested compaction summarizers.
-const CompactionSummaryInstructions = "You are compacting a coding-assistant conversation to save context. " +
+// summaryInstructions is the system prompt handed to the summarizer model.
+const summaryInstructions = "You are compacting a coding-assistant conversation to save context. " +
 	"Write a dense, factual summary of the conversation so far. Preserve: the user's goals and explicit constraints; " +
 	"decisions made and why; files created or modified (with paths) and key code changes; commands run and their important " +
-	"results; and anything still in progress or unresolved. Omit pleasantries. Use terse bullet points. Do not invent details. " +
-	"If the conversation already begins with an earlier summary block, treat its facts as established context and carry them " +
-	"forward into the new summary — never drop earlier information."
+	"results; and anything still in progress or unresolved. Omit pleasantries. Use terse bullet points. Do not invent details."
 
 // CompactionOptions configure a single Compact call.
 type CompactionOptions struct {
@@ -59,109 +47,26 @@ type CompactionOptions struct {
 	// injected so Compact stays pure and testable; the agent loop wires it to a
 	// real provider call.
 	Summarize func(toSummarize []zeroruntime.Message) (string, error)
-	// taskState is a snapshot supplied by the running agent. Its immutable
-	// objective is always preserved; mutable fields are admitted only when its
-	// plan projection still matches the transcript.
-	taskState *taskStateSnapshot
 }
 
-// CompactionResult is the metadata-bearing result returned by CompactMessages.
-type CompactionResult struct {
-	// Messages is the original conversation or the compacted replacement.
-	Messages []zeroruntime.Message
-	// RemovedCount is the number of original messages summarized away.
-	RemovedCount int
-	// PreservedCount is the number of original messages kept verbatim, including
-	// leading system messages and the preserved suffix.
-	PreservedCount int
-	// SummaryText is the trimmed text returned by the summarizer. The injected
-	// summary message also includes summaryLabel and any preserved structured
-	// state needed by later compactions.
-	SummaryText string
-	// ProjectedChars is the text content sent to the summarizer after semantic
-	// projection, excluding provider protocol framing.
-	ProjectedChars int
-	// Truncated reports whether projection dropped content to satisfy its
-	// bounded brief or previous-summary limits.
-	Truncated bool
-	// Compacted reports whether Messages contains an injected summary.
-	Compacted bool
-}
-
-// imageTokenEstimate is a flat per-image token cost. Vision models tokenize an
-// image by its resolution (tiles), not its byte length, so the raw Data size is
-// a poor proxy — counting len(Data)/4 would overcount by orders of magnitude.
-// A fixed estimate keeps estimateTokens monotonic in the image count so an
-// image-heavy context still trends toward compaction instead of reading as ~0.
-// ~1k tokens is a representative mid-range cost across providers.
-const imageTokenEstimate = 1000
-
-// ApproxTextTokens estimates the token count of text WITHOUT a real tokenizer.
-// The BPE tokenizers zero targets fold a run's leading space into the following
-// token rather than emitting whitespace as its own token, so naive len/4
-// overcounts real text by ~15-20% (measured: a 24.8k-char prompt counted 5.2k
-// real tokens where len/4 said 6.2k). Counting NON-whitespace bytes / 4 tracks
-// the provider's actual count closely (validated against live usage) while
-// staying allocation- and dependency-free. zero still receives the exact count
-// back as usage on every request; this estimate is only for the pre-request
-// context budget preview and the compaction threshold.
-func ApproxTextTokens(value string) int {
-	nonSpace := 0
-	for i := 0; i < len(value); i++ {
-		switch value[i] {
-		case ' ', '\t', '\n', '\r', '\f', '\v':
-		default:
-			nonSpace++
-		}
-	}
-	return nonSpace / 4
-}
-
-// estimateTokens is a cheap, dependency-free token estimate (see ApproxTextTokens)
-// across message content plus tool call names/arguments and a flat per-image
-// cost. It deliberately uses no real tokenizer; it only needs to be monotonic
-// and roughly proportional so the loop can decide when to compact.
+// estimateTokens is a cheap, dependency-free token estimate (~4 chars/token)
+// across message content plus tool call names/arguments. It deliberately uses no
+// real tokenizer; it only needs to be monotonic and roughly proportional so the
+// loop can decide when to compact.
 func estimateTokens(messages []zeroruntime.Message) int {
 	total := 0
 	for _, message := range messages {
-		total += ApproxTextTokens(message.Content)
+		total += len(message.Content) / 4
 		for _, call := range message.ToolCalls {
-			total += ApproxTextTokens(call.Name)
-			total += ApproxTextTokens(call.Arguments)
+			total += len(call.Name) / 4
+			total += len(call.Arguments) / 4
 			total += 4 // small per-call overhead
 		}
-		total += len(message.Images) * imageTokenEstimate
 		total += 4 // per-message overhead
 	}
 	return total
 }
 
-// estimateToolDefTokens approximates the input-token cost of the tool definitions
-// sent with every request (~4 chars/token, matching estimateTokens). Compaction
-// must include them: they ride on every turn, so ignoring them under-counts the
-// real context and can let it blow past the model limit while the message-only
-// estimate still looks under threshold.
-func estimateToolDefTokens(tools []zeroruntime.ToolDefinition) int {
-	total := 0
-	for _, tool := range tools {
-		total += ApproxTextTokens(tool.Name)
-		total += ApproxTextTokens(tool.Description)
-		total += ApproxTextTokens(string(tool.Type))
-		if len(tool.Parameters) > 0 {
-			if encoded, err := json.Marshal(tool.Parameters); err == nil {
-				total += ApproxTextTokens(string(encoded))
-			}
-		}
-		if tool.Format != nil {
-			total += ApproxTextTokens(tool.Format.Type)
-			total += ApproxTextTokens(tool.Format.Syntax)
-			total += ApproxTextTokens(tool.Format.Definition)
-		}
-		total += 4 // per-tool overhead
-	}
-	return total
-}
-
 // compactionThreshold is the estimated-token level at which proactive
 // compaction triggers for a given context window.
 func compactionThreshold(contextWindow int) int {
@@ -189,23 +94,12 @@ func compactionThreshold(contextWindow int) int {
 // Compact is pure: it performs no provider I/O. A Summarize error is returned to
 // the caller, which decides how to recover.
 func Compact(messages []zeroruntime.Message, opts CompactionOptions) ([]zeroruntime.Message, error) {
-	result, err := CompactMessages(messages, opts)
-	if err != nil {
-		return nil, err
-	}
-	return result.Messages, nil
-}
-
-// CompactMessages summarizes the oldest middle of a conversation and returns
-// both the replacement messages and UI/session-friendly metadata about what
-// changed. It uses the same compaction rules as Compact.
-func CompactMessages(messages []zeroruntime.Message, opts CompactionOptions) (CompactionResult, error) {
 	preserveLast := opts.PreserveLast
 	if preserveLast <= 0 {
 		preserveLast = defaultCompactionPreserveLast
 	}
 	if opts.Summarize == nil {
-		return CompactionResult{}, errors.New("compaction requires a Summarize function")
+		return nil, errors.New("compaction requires a Summarize function")
 	}
 
 	// Leading system messages are kept verbatim at the head.
@@ -225,79 +119,23 @@ func CompactMessages(messages []zeroruntime.Message, opts CompactionOptions) (Co
 	middle := messages[systemEnd:boundary]
 	if len(middle) == 0 {
 		// Nothing to summarize once system + preserved suffix are removed.
-		return CompactionResult{
-			Messages:       messages,
-			PreservedCount: len(messages),
-		}, nil
+		return messages, nil
 	}
 
-	summaryResult, err := SummarizeCompactionMessages(middle, opts.Summarize)
+	summary, err := opts.Summarize(middle)
 	if err != nil {
-		return CompactionResult{}, err
+		return nil, err
 	}
-	summary := summaryResult.SummaryText
-
-	// Preserve structured state (active plan + loaded skills) from the elided
-	// middle verbatim, so it is not lost or paraphrased away by the prose summary.
-	content := appendPreservedState(summaryLabel+"\n"+summary, middle, opts.taskState)
+	summary = strings.TrimSpace(summary)
 
 	compacted := make([]zeroruntime.Message, 0, systemEnd+1+(len(messages)-boundary))
 	compacted = append(compacted, messages[:systemEnd]...)
 	compacted = append(compacted, zeroruntime.Message{
 		Role:    zeroruntime.MessageRoleUser,
-		Content: content,
+		Content: summaryLabel + "\n" + summary,
 	})
 	compacted = append(compacted, messages[boundary:]...)
-	return CompactionResult{
-		Messages:       compacted,
-		RemovedCount:   len(middle),
-		PreservedCount: len(messages) - len(middle),
-		SummaryText:    summary,
-		ProjectedChars: summaryResult.ProjectedChars,
-		Truncated:      summaryResult.Truncated,
-		Compacted:      true,
-	}, nil
-}
-
-// CompactionSummaryResult describes the shared summarization input and output.
-type CompactionSummaryResult struct {
-	SummaryText    string
-	ProjectedChars int
-	Truncated      bool
-}
-
-// SummarizeCompactionMessages applies the shared semantic projection before
-// invoking a caller-supplied summarizer. Automatic context-pressure compaction
-// and manual session compaction both use this path.
-func SummarizeCompactionMessages(messages []zeroruntime.Message, summarize func([]zeroruntime.Message) (string, error)) (CompactionSummaryResult, error) {
-	if summarize == nil {
-		return CompactionSummaryResult{}, errors.New("compaction requires a Summarize function")
-	}
-	projection := projectCompactionInput(messages)
-	summaryInput := projection.messages
-	if len(summaryInput) == 0 {
-		summaryInput = messages
-	}
-	summary, err := summarize(summaryInput)
-	if err != nil {
-		return CompactionSummaryResult{}, err
-	}
-	return CompactionSummaryResult{
-		SummaryText:    strings.TrimSpace(summary),
-		ProjectedChars: compactionMessageChars(summaryInput),
-		Truncated:      projection.truncated,
-	}, nil
-}
-
-func compactionMessageChars(messages []zeroruntime.Message) int {
-	total := 0
-	for _, message := range messages {
-		total += len(message.Content)
-		for _, call := range message.ToolCalls {
-			total += len(call.Name) + len(call.Arguments)
-		}
-	}
-	return total
+	return compacted, nil
 }
 
 // safeSuffixBoundary walks the preserve boundary backward (toward systemEnd) so
@@ -348,25 +186,6 @@ func isContextLimitError(message string) bool {
 	return false
 }
 
-// isStreamTimeoutError reports whether a streamed error is a provider stream
-// idle/stall timeout (providerio surfaces these as "idle timeout after …" /
-// "no output for …" / "stream stalled"). Such a turn produced nothing, so when
-// no content was forwarded yet it can be safely re-issued on a fresh connection
-// (see the stall-retry in the agent loop). Substring + case-insensitive to
-// tolerate the prefixed "provider stream error: …" wrapping.
-func isStreamTimeoutError(message string) bool {
-	lowered := strings.ToLower(strings.TrimSpace(message))
-	if lowered == "" {
-		return false
-	}
-	for _, needle := range []string{"idle timeout after", "no output for", "stream stalled"} {
-		if strings.Contains(lowered, needle) {
-			return true
-		}
-	}
-	return false
-}
-
 // compactionState carries the per-run state the agent loop needs to compact a
 // conversation safely. It is created once per Run and is a no-op whenever
 // options.ContextWindow <= 0.
@@ -384,155 +203,14 @@ type compactionState struct {
 	// (even after compaction) could loop indefinitely; one attempt then the
 	// original error surfaces.
 	reactiveAttempted bool
-	// onUsage forwards the summarizer call's token usage for accounting/budgeting.
-	// OnText is deliberately NOT forwarded (compaction stays invisible to the user),
-	// but its token COST must still be counted so usage reports and budgets include it.
-	onUsage func(Usage)
-	task    *taskState
-	planner *contextPlanner
-	trace   *trace.Recorder
-
-	// calibrationRatio scales the raw byte/4 token estimate toward the provider's
-	// real prompt-token count. ApproxTextTokens over-counts code-heavy content by
-	// ~15-20%, which would trip compaction early (at ~60% of true capacity). It
-	// starts at 1.0 and converges via an EMA as each turn reports actual usage, so
-	// later turns compact nearer to real capacity. Zero is treated as 1.0.
-	calibrationRatio float64
-
-	// summarizerFactory lazily builds the dedicated (cheap) summarizer provider
-	// (Options.Summarizer) for the current main model. summarizerProvider
-	// memoizes the built provider and summarizerResolved records that the
-	// factory ran (it may legitimately return no provider: the main model is
-	// already the cheap one). summarizerBroken is the sticky fallback: once a
-	// build or call fails, the run stays on the main provider until the next
-	// model switch — a misconfigured cheap model must never break (or
-	// repeatedly delay) compaction.
-	summarizerFactory  func(ctx context.Context, mainModelID string) (Provider, error)
-	summarizerProvider Provider
-	summarizerResolved bool
-	summarizerBroken   bool
-	// window is the context window the threshold was derived from. The
-	// reactive free-prune stage compares against it (the limit the provider
-	// enforces), not against the 70% proactive threshold — a pruned history
-	// between the two would still succeed on retry.
-	window int
-	// mainModel is the model the run currently streams on; the summarizer
-	// choice is made against it and remade after a mid-run switch.
-	mainModel string
 }
 
-// calibrate folds one turn's (rawEstimate, actualPromptTokens) sample into the
-// running calibration ratio. A single sample is clamped to a sane band so an
-// outlier (a huge cache-read turn, a provider-overhead spike) can't skew the
-// estimate enough to disable or thrash compaction.
-func (state *compactionState) calibrate(rawEstimate int, actualPromptTokens int) {
-	if !state.enabled || rawEstimate <= 0 || actualPromptTokens <= 0 {
-		return
+func newCompactionState(options Options) *compactionState {
+	return &compactionState{
+		enabled:      options.ContextWindow > 0,
+		threshold:    compactionThreshold(options.ContextWindow),
+		preserveLast: options.CompactionPreserveLast,
 	}
-	sample := float64(actualPromptTokens) / float64(rawEstimate)
-	if sample < 0.5 {
-		sample = 0.5
-	} else if sample > 2.0 {
-		sample = 2.0
-	}
-	if state.calibrationRatio <= 0 {
-		state.calibrationRatio = 1.0
-	}
-	const alpha = 0.3 // weight on the newest sample; smooths jitter across turns
-	state.calibrationRatio = state.calibrationRatio*(1-alpha) + sample*alpha
-}
-
-// calibratedTokens applies the learned ratio to a raw estimate. Before any sample
-// arrives (ratio unset) it returns the raw estimate unchanged.
-func (state *compactionState) calibratedTokens(raw int) int {
-	if state.calibrationRatio <= 0 {
-		return raw
-	}
-	return int(float64(raw) * state.calibrationRatio)
-}
-
-func newCompactionState(options Options, task *taskState) *compactionState {
-	state := &compactionState{
-		enabled:           options.ContextWindow > 0,
-		threshold:         compactionThreshold(options.ContextWindow),
-		window:            options.ContextWindow,
-		mainModel:         options.Model,
-		preserveLast:      options.CompactionPreserveLast,
-		onUsage:           options.OnUsage,
-		task:              task,
-		planner:           newContextPlanner(contextPlannerConfig{contextWindow: options.ContextWindow, serviceTier: options.ServiceTier}),
-		trace:             options.Trace,
-		summarizerFactory: options.Summarizer,
-	}
-	return state
-}
-
-// updateWindow re-derives the compaction threshold after a mid-run model
-// switch. The low-water mark is reset: it was measured against the old
-// threshold, and keeping it could suppress a compaction the smaller window
-// now requires. <= 0 (unknown model) leaves everything unchanged.
-func (state *compactionState) updateWindow(window int) {
-	if window <= 0 {
-		return
-	}
-	state.enabled = true
-	state.window = window
-	state.threshold = compactionThreshold(window)
-	state.lowWaterMark = 0
-	if state.planner != nil {
-		state.planner.config.contextWindow = window
-	}
-}
-
-// switchModel records a mid-run model switch: the window is re-derived
-// (window <= 0 keeps the old one) and the summarizer choice is forgotten so
-// the next compaction re-resolves it against the new main model. A run that
-// started on the cheap model (no dedicated summarizer) and escalated to an
-// expensive one therefore regains cheap summaries — the exact workflow a
-// dedicated summarizer exists for.
-func (state *compactionState) switchModel(modelID string, window int) {
-	state.mainModel = modelID
-	state.updateWindow(window)
-	state.summarizerProvider = nil
-	state.summarizerResolved = false
-	state.summarizerBroken = false
-}
-
-// summarizeProvider returns the provider summarization calls should use and
-// whether it is the dedicated summarizer: that one when it applies to the
-// current main model and is healthy, else the main provider. The factory runs
-// at most once per main model; a build error marks the summarizer broken for
-// that model. Callers branch on the boolean rather than comparing Provider
-// values — interface comparison panics on a non-comparable dynamic type.
-func (state *compactionState) summarizeProvider(ctx context.Context, main Provider) (Provider, bool) {
-	if state.summarizerFactory == nil || state.summarizerBroken {
-		return main, false
-	}
-	if !state.summarizerResolved {
-		state.summarizerResolved = true
-		built, err := state.summarizerFactory(ctx, state.mainModel)
-		if err != nil {
-			state.summarizerBroken = true
-			return main, false
-		}
-		state.summarizerProvider = built
-	}
-	if state.summarizerProvider == nil {
-		return main, false
-	}
-	return state.summarizerProvider, true
-}
-
-// fitsWindow reports whether a calibrated size is safely under the limit the
-// provider enforces. The proactive threshold (70% of the window) is a trigger
-// for the paid summarizer, not the hard limit; the reactive path compares
-// against the window itself, with a small margin for estimate error, so a
-// history pruned to, say, 85% of the window takes the free retry.
-func (state *compactionState) fitsWindow(size int) bool {
-	if state.window <= 0 {
-		return size <= state.threshold
-	}
-	return size <= state.window-state.window/20
 }
 
 // maybeCompact runs proactive compaction at the top of a turn. It returns the
@@ -543,16 +221,11 @@ func (state *compactionState) maybeCompact(
 	ctx context.Context,
 	provider Provider,
 	messages []zeroruntime.Message,
-	tools []zeroruntime.ToolDefinition,
 ) []zeroruntime.Message {
 	if !state.enabled {
 		return messages
 	}
-	// Tool definitions are part of every request's input, so count them alongside
-	// the messages; both the threshold check and the shrink check below use the
-	// same term so they stay consistent.
-	toolTokens := estimateToolDefTokens(tools)
-	size := state.calibratedTokens(estimateTokens(messages) + toolTokens)
+	size := estimateTokens(messages)
 	if size <= state.threshold {
 		return messages
 	}
@@ -563,50 +236,22 @@ func (state *compactionState) maybeCompact(
 		return messages
 	}
 
-	// CHEAP FIRST STAGE: reclaim context at zero token/latency cost by pruning
-	// the bodies of old, large tool results (the model has already acted on
-	// them). If that brings us back under threshold, skip the paid summarizer
-	// entirely and preserve recent turns verbatim.
-	if pruned, reclaimed := pruneSupersededReadResults(messages); reclaimed > 0 {
-		messages = pruned
-		size = state.calibratedTokens(estimateTokens(messages) + toolTokens)
-		if size <= state.threshold {
-			state.lowWaterMark = size
-			return messages
-		}
-	}
-	if pruned, reclaimed := pruneStaleToolOutput(messages, state.preserveLast); reclaimed > 0 {
-		messages = pruned
-		size = state.calibratedTokens(estimateTokens(messages) + toolTokens)
-		if size <= state.threshold {
-			state.lowWaterMark = size
-			return messages
-		}
-	}
-
 	compacted, err := Compact(messages, CompactionOptions{
 		PreserveLast: state.preserveLast,
-		Summarize:    state.summarizeClosure(ctx, provider),
-		taskState:    state.task.snapshotForCompaction(messages),
+		Summarize:    summarizeClosure(ctx, provider),
 	})
 	if err != nil {
 		// Summarizer failed: keep the original history. The reactive path (or a
 		// later turn) can try again; we never drop messages on failure here.
 		return messages
 	}
-	newSize := state.calibratedTokens(estimateTokens(compacted) + toolTokens)
+	newSize := estimateTokens(compacted)
 	if newSize >= size {
 		// Compaction did not actually shrink anything (e.g. nothing to
 		// summarize). Leave the history untouched and don't churn next turn.
 		state.lowWaterMark = size
 		return messages
 	}
-	// Only count a compaction when it actually shrank the history, so the
-	// compaction counter reflects real context reductions rather than paid
-	// no-ops that left the token budget untouched.
-	if r := trace.FromContext(ctx); r != nil {
-		r.Counter(trace.CounterCompactionCount, 1)
-	}
 	state.lowWaterMark = newSize
 	return compacted
 }
@@ -620,7 +265,6 @@ func (state *compactionState) recover(
 	ctx context.Context,
 	provider Provider,
 	messages []zeroruntime.Message,
-	tools []zeroruntime.ToolDefinition,
 	errorMessage string,
 ) (compacted []zeroruntime.Message, retried bool, err error) {
 	if !state.enabled {
@@ -628,41 +272,16 @@ func (state *compactionState) recover(
 		// context-limit error never triggers an unexpected summarization call.
 		return messages, false, nil
 	}
-	if !isContextLimitError(errorMessage) {
+	if state.reactiveAttempted {
 		return messages, false, nil
 	}
-
-	// CHEAP FIRST STAGE (mirrors maybeCompact): a context-limit failure can
-	// often be fixed for free by dropping superseded reads and pruning old
-	// tool-result bodies. It runs regardless of the one-shot reactive budget
-	// (it costs nothing and cannot loop: a second pass finds nothing left to
-	// prune). The free retry is taken only when the pruned history fits the
-	// window the provider enforces — otherwise a retry would fail the same
-	// way, so fall through to the paid summarizer in this same call.
-	toolTokens := estimateToolDefTokens(tools)
-	prunedAny := false
-	if pruned, reclaimed := pruneSupersededReadResults(messages); reclaimed > 0 {
-		messages, prunedAny = pruned, true
-	}
-	if pruned, reclaimed := pruneStaleToolOutput(messages, state.preserveLast); reclaimed > 0 {
-		messages, prunedAny = pruned, true
-	}
-	if prunedAny {
-		size := state.calibratedTokens(estimateTokens(messages) + toolTokens)
-		if state.fitsWindow(size) {
-			state.lowWaterMark = size
-			return messages, true, nil
-		}
-	}
-
-	if state.reactiveAttempted {
+	if !isContextLimitError(errorMessage) {
 		return messages, false, nil
 	}
 
 	result, compactErr := Compact(messages, CompactionOptions{
 		PreserveLast: state.preserveLast,
-		Summarize:    state.summarizeClosure(ctx, provider),
-		taskState:    state.task.snapshotForCompaction(messages),
+		Summarize:    summarizeClosure(ctx, provider),
 	})
 	if compactErr != nil {
 		// A genuine compaction attempt was made (and failed): the budget is spent
@@ -679,155 +298,42 @@ func (state *compactionState) recover(
 	}
 	// Success: a real compaction shrank the history and we will retry. Consume the
 	// one-shot budget now so a provider that keeps returning context-limit errors
-	// after a successful compaction can't loop forever. Store the low-water mark in
-	// the SAME combined (messages + tool-defs) domain maybeCompact uses, so the
-	// proactive shrink-guard compares like with like. Count it now that the shrink
-	// is confirmed, so the counter mirrors maybeCompact's real-reduction policy.
-	if r := trace.FromContext(ctx); r != nil {
-		r.Counter(trace.CounterCompactionCount, 1)
-	}
+	// after a successful compaction can't loop forever.
 	state.reactiveAttempted = true
-	state.lowWaterMark = state.calibratedTokens(estimateTokens(result) + estimateToolDefTokens(tools))
+	state.lowWaterMark = estimateTokens(result)
 	return result, true, nil
 }
 
 // summarizeClosure builds a Summarize function backed by a focused, tool-less
-// provider call. The summary stream intentionally does NOT forward OnText (so
-// compaction stays invisible on the user-facing surface), but it DOES forward
-// OnUsage so the summarizer's token cost is still counted by usage/budgeting.
-// The call goes to the dedicated (cheap) summarizer when one applies; if that
-// call fails the summarizer is marked broken for the current model and the
-// same slice is retried once on the main provider, so the caller sees at most
-// one (main-provider-quality) error.
-func (state *compactionState) summarizeClosure(ctx context.Context, provider Provider) func([]zeroruntime.Message) (string, error) {
-	if state.planner == nil {
-		state.planner = newContextPlanner(contextPlannerConfig{})
-	}
+// provider call. The summary stream intentionally does NOT forward OnText /
+// OnUsage callbacks, so compaction stays invisible on the user-facing surface.
+func summarizeClosure(ctx context.Context, provider Provider) func([]zeroruntime.Message) (string, error) {
 	return func(toSummarize []zeroruntime.Message) (string, error) {
-		chosen, dedicated := state.summarizeProvider(ctx, provider)
-		summary, err := summarizeWithPlanner(ctx, chosen, toSummarize, state.onUsage, state.planner, state.trace)
-		if err == nil || !dedicated {
-			return summary, err
+		request := zeroruntime.CompletionRequest{
+			Messages: []zeroruntime.Message{
+				{Role: zeroruntime.MessageRoleSystem, Content: summaryInstructions},
+				{Role: zeroruntime.MessageRoleUser, Content: "Summarize this conversation:\n\n" + renderTranscript(toSummarize)},
+			},
+			// No tools: this is a plain text summarization call.
+		}
+		stream, err := provider.StreamCompletion(ctx, request)
+		if err != nil {
+			return "", err
+		}
+		collected := zeroruntime.CollectStream(ctx, stream)
+		if collected.Error != "" {
+			return "", errors.New(collected.Error)
+		}
+		summary := strings.TrimSpace(collected.Text)
+		if summary == "" {
+			return "", errors.New("summarizer returned no text")
 		}
-		state.summarizerBroken = true
-		return summarizeWithPlanner(ctx, provider, toSummarize, state.onUsage, state.planner, state.trace)
-	}
-}
-
-// summarizeWithFallback summarizes messages in a single provider call. If that
-// call fails with a context-limit error — the slice to summarize is itself too
-// large for the model's input window — it splits the slice in half, summarizes
-// each half recursively, and joins the partial summaries. This keeps compaction
-// working when the elided middle is bigger than the summarizer's own context.
-// Non-context-limit errors (and a single message that still won't fit) surface
-// to the caller unchanged.
-func summarizeWithFallback(ctx context.Context, provider Provider, messages []zeroruntime.Message, onUsage func(Usage)) (string, error) {
-	return summarizeWithPlanner(ctx, provider, messages, onUsage, newContextPlanner(contextPlannerConfig{}), nil)
-}
-
-func summarizeWithPlanner(ctx context.Context, provider Provider, messages []zeroruntime.Message, onUsage func(Usage), planner *contextPlanner, recorder *trace.Recorder) (string, error) {
-	summary, err := summarizeMessagesOnce(ctx, provider, messages, onUsage, planner, recorder)
-	if err == nil {
 		return summary, nil
 	}
-	if len(messages) < 2 || !isContextLimitError(err.Error()) {
-		return "", err
-	}
-
-	mid := len(messages) / 2
-	left, leftErr := summarizeWithPlanner(ctx, provider, messages[:mid], onUsage, planner, recorder)
-	if leftErr != nil {
-		return "", leftErr
-	}
-	right, rightErr := summarizeWithPlanner(ctx, provider, messages[mid:], onUsage, planner, recorder)
-	if rightErr != nil {
-		return "", rightErr
-	}
-
-	// Re-summarize the two partial summaries into ONE so the persisted summary
-	// stays a single, further-summarizable unit — not an ever-growing concatenated
-	// blob that a later compaction (which can't split a single message) would fail
-	// on. If even the combined partials don't fit (extreme), fall back to the
-	// joined text: still better than failing, and each half is already compacted.
-	combined := strings.TrimSpace(left + "\n\n" + right)
-	reduced, reduceErr := summarizeMessagesOnce(ctx, provider, []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleUser, Content: combined},
-	}, onUsage, planner, recorder)
-	if reduceErr != nil {
-		if isContextLimitError(reduceErr.Error()) {
-			// Even the two combined partials don't fit (extreme): fall back to the
-			// joined text — still better than failing, and each half is already
-			// compacted.
-			return combined, nil
-		}
-		// A non-context failure (auth/network/provider) must surface unchanged, per
-		// this function's contract — don't mask it behind the joined fallback.
-		return "", reduceErr
-	}
-	return reduced, nil
-}
-
-// summarizeMessagesOnce performs a single tool-less summarization call.
-func summarizeMessagesOnce(ctx context.Context, provider Provider, messages []zeroruntime.Message, onUsage func(Usage), planner *contextPlanner, recorder *trace.Recorder) (string, error) {
-	requestMessages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: CompactionSummaryInstructions},
-		{Role: zeroruntime.MessageRoleUser, Content: "Summarize this conversation:\n\n" + renderTranscript(messages)},
-	}
-	parts := systemPromptParts{prompt: CompactionSummaryInstructions, baseInstructions: CompactionSummaryInstructions}
-	plan := planner.planWithPromptParts(requestMessages, nil, "", parts)
-	recordContextPlanTrace(recorder, plan)
-	stream, err := provider.StreamCompletion(ctx, plan.Request)
-	if err != nil {
-		return "", err
-	}
-	// Forward OnUsage (token accounting) but not OnText (keep compaction invisible
-	// to the user); a nil onUsage is a no-op.
-	collected := zeroruntime.CollectStreamWithOptions(ctx, stream, zeroruntime.CollectOptions{OnUsage: onUsage})
-	if collected.Error != "" {
-		return "", errors.New(collected.Error)
-	}
-	summary := strings.TrimSpace(collected.Text)
-	if summary == "" {
-		return "", errors.New("summarizer returned no text")
-	}
-	return summary, nil
-}
-
-// summaryToolResultClamp bounds each tool-result body in the summarizer input.
-// Tool outputs dominate the elided middle's bulk (build logs, file reads,
-// search results), yet the summary instructions only need their gist — the
-// model that ACTED on the full output already turned it into decisions the
-// surrounding messages record. 2,000 chars (~500 tokens) keeps the useful
-// head+tail of a result while cutting the summarizer input by 5-10x on
-// tool-heavy sessions; the summarizer's own cost is the price being cut.
-const summaryToolResultClamp = 2000
-
-// summaryToolArgsClamp bounds each tool-call argument blob in the transcript:
-// a write_file call carries the whole file body in its arguments.
-const summaryToolArgsClamp = 500
-
-// clampForSummary head+tail-truncates text for the summarizer transcript,
-// snapping to rune boundaries so the clamp never splits a UTF-8 sequence.
-func clampForSummary(text string, max int) string {
-	if max <= 0 || len(text) <= max {
-		return text
-	}
-	head := max * 3 / 4
-	tail := max - head
-	for head > 0 && !utf8.RuneStart(text[head]) {
-		head--
-	}
-	start := len(text) - tail
-	for start < len(text) && !utf8.RuneStart(text[start]) {
-		start++
-	}
-	return text[:head] + "\n…[" + strconv.Itoa(len(text)-head-(len(text)-start)) + " chars omitted for summarization]…\n" + text[start:]
 }
 
 // renderTranscript flattens messages into a plain-text transcript for the
 // summarizer. Secret scrubbing already happened upstream at the tool boundary.
-// Tool-result bodies and tool-call arguments are clamped (see the constants
-// above): the summary needs what was done and decided, not the raw payloads.
 func renderTranscript(messages []zeroruntime.Message) string {
 	lines := make([]string, 0, len(messages))
 	for _, message := range messages {
@@ -837,13 +343,13 @@ func renderTranscript(messages []zeroruntime.Message) string {
 			if len(message.ToolCalls) > 0 {
 				calls := make([]string, 0, len(message.ToolCalls))
 				for _, call := range message.ToolCalls {
-					calls = append(calls, call.Name+"("+clampForSummary(call.Arguments, summaryToolArgsClamp)+")")
+					calls = append(calls, call.Name+"("+call.Arguments+")")
 				}
 				line += "\n[tool calls: " + strings.Join(calls, "; ") + "]"
 			}
 			lines = append(lines, line)
 		case zeroruntime.MessageRoleTool:
-			lines = append(lines, "tool result: "+clampForSummary(message.Content, summaryToolResultClamp))
+			lines = append(lines, "tool result: "+message.Content)
 		default:
 			lines = append(lines, string(message.Role)+": "+message.Content)
 		}

internal/agent/compaction_calibrate_test.go

@@ -1,50 +0,0 @@
-package agent
-
-import "testing"
-
-func TestCalibrationConvergesTowardActual(t *testing.T) {
-	state := &compactionState{enabled: true}
-
-	// Before any sample, the estimate is unchanged.
-	if got := state.calibratedTokens(1000); got != 1000 {
-		t.Fatalf("uncalibrated tokens = %d, want 1000", got)
-	}
-
-	// The estimator over-counts: our raw estimate is 1000 but the provider reports
-	// 850 (a 0.85 ratio). Feeding that sample repeatedly should pull the ratio
-	// toward 0.85, so a 1000-token raw estimate calibrates downward.
-	for range 20 {
-		state.calibrate(1000, 850)
-	}
-	got := state.calibratedTokens(1000)
-	if got >= 1000 || got < 820 || got > 880 {
-		t.Fatalf("calibrated tokens = %d, want ~850 after convergence", got)
-	}
-}
-
-func TestCalibrateIgnoresDegenerateSamples(t *testing.T) {
-	state := &compactionState{enabled: true}
-	state.calibrate(0, 500) // zero estimate
-	state.calibrate(500, 0) // zero actual
-	if state.calibrationRatio != 0 {
-		t.Fatalf("degenerate samples must not move the ratio, got %v", state.calibrationRatio)
-	}
-	// Disabled state never calibrates.
-	disabled := &compactionState{enabled: false}
-	disabled.calibrate(1000, 850)
-	if disabled.calibrationRatio != 0 {
-		t.Fatalf("disabled compaction must not calibrate, got %v", disabled.calibrationRatio)
-	}
-}
-
-func TestCalibrateClampsOutliers(t *testing.T) {
-	state := &compactionState{enabled: true}
-	// A wild outlier (10x) is clamped to 2.0, so one bad sample can't blow up the
-	// ratio and disable compaction.
-	for range 50 {
-		state.calibrate(1000, 10000)
-	}
-	if state.calibrationRatio > 2.0 {
-		t.Fatalf("ratio should be clamped at 2.0, got %v", state.calibrationRatio)
-	}
-}

internal/agent/compaction_cheap_test.go

@@ -1,469 +0,0 @@
-package agent
-
-import (
-	"context"
-	"errors"
-	"strings"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/tools"
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-// compactableHistory returns a history whose middle is large enough to trip
-// the proactive threshold for a 1000-token window.
-func compactableHistory() []zeroruntime.Message {
-	return []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "sys"},
-		{Role: zeroruntime.MessageRoleUser, Content: strings.Repeat("u", 4000)},
-		{Role: zeroruntime.MessageRoleAssistant, Content: strings.Repeat("a", 4000)},
-		{Role: zeroruntime.MessageRoleUser, Content: "u2"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "a2"},
-		{Role: zeroruntime.MessageRoleUser, Content: "u3"},
-	}
-}
-
-// Summarization must run on the dedicated (cheap) summarizer when one is
-// configured — the main provider sees no summarize traffic at all.
-func TestMaybeCompactUsesDedicatedSummarizer(t *testing.T) {
-	cheap := &mockProvider{turns: [][]zeroruntime.StreamEvent{{
-		{Type: zeroruntime.StreamEventText, Content: "CHEAP SUMMARY"},
-		{Type: zeroruntime.StreamEventDone},
-	}}}
-	main := &mockProvider{}
-	factoryCalls := 0
-	state := newCompactionState(Options{
-		ContextWindow:          1000,
-		CompactionPreserveLast: 2,
-		Summarizer: func(context.Context, string) (Provider, error) {
-			factoryCalls++
-			return cheap, nil
-		},
-	}, nil)
-
-	compacted := state.maybeCompact(context.Background(), main, compactableHistory(), nil)
-
-	if len(cheap.requests) == 0 {
-		t.Fatal("dedicated summarizer never received the summarize call")
-	}
-	if len(main.requests) != 0 {
-		t.Fatalf("main provider must see no summarize traffic, got %d requests", len(main.requests))
-	}
-	if factoryCalls != 1 {
-		t.Fatalf("summarizer factory calls = %d, want 1 (lazy, memoized)", factoryCalls)
-	}
-	if estimateTokens(compacted) >= estimateTokens(compactableHistory()) {
-		t.Fatal("compaction did not shrink the history")
-	}
-	found := false
-	for _, message := range compacted {
-		if strings.Contains(message.Content, "CHEAP SUMMARY") {
-			found = true
-		}
-	}
-	if !found {
-		t.Fatal("cheap summarizer's summary missing from the compacted history")
-	}
-}
-
-// A failing summarizer falls back to the main provider for the SAME slice and
-// stays broken for the rest of the run — no repeated failed cheap calls.
-func TestSummarizerFailureFallsBackToMainAndSticks(t *testing.T) {
-	broken := &mockProvider{turns: [][]zeroruntime.StreamEvent{{
-		{Type: zeroruntime.StreamEventError, Error: "boom: model not found"},
-	}}}
-	main := &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		{{Type: zeroruntime.StreamEventText, Content: "MAIN SUMMARY"}, {Type: zeroruntime.StreamEventDone}},
-		{{Type: zeroruntime.StreamEventText, Content: "MAIN SUMMARY 2"}, {Type: zeroruntime.StreamEventDone}},
-	}}
-	state := newCompactionState(Options{
-		ContextWindow:          1000,
-		CompactionPreserveLast: 2,
-		Summarizer:             func(context.Context, string) (Provider, error) { return broken, nil },
-	}, nil)
-	summarize := state.summarizeClosure(context.Background(), main)
-	input := []zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: "history"}}
-
-	summary, err := summarize(input)
-	if err != nil {
-		t.Fatalf("fallback must succeed via the main provider: %v", err)
-	}
-	if summary != "MAIN SUMMARY" {
-		t.Fatalf("summary = %q, want the main provider's", summary)
-	}
-	if len(broken.requests) != 1 {
-		t.Fatalf("broken summarizer requests = %d, want exactly 1", len(broken.requests))
-	}
-	if !state.summarizerBroken {
-		t.Fatal("a failed summarizer must be marked broken for the run")
-	}
-
-	// Second summarization: straight to main, no cheap retry.
-	if _, err := summarize(input); err != nil {
-		t.Fatal(err)
-	}
-	if len(broken.requests) != 1 {
-		t.Fatalf("broken summarizer was retried (%d requests)", len(broken.requests))
-	}
-	if len(main.requests) != 2 {
-		t.Fatalf("main provider requests = %d, want 2", len(main.requests))
-	}
-}
-
-// A factory that errors (misconfigured model) is equivalent to no summarizer:
-// main provider used, factory not retried.
-func TestSummarizerFactoryErrorFallsBack(t *testing.T) {
-	main := &mockProvider{turns: [][]zeroruntime.StreamEvent{{
-		{Type: zeroruntime.StreamEventText, Content: "MAIN SUMMARY"},
-		{Type: zeroruntime.StreamEventDone},
-	}}}
-	factoryCalls := 0
-	state := newCompactionState(Options{
-		ContextWindow:          1000,
-		CompactionPreserveLast: 2,
-		Summarizer: func(context.Context, string) (Provider, error) {
-			factoryCalls++
-			return nil, errors.New("unknown model")
-		},
-	}, nil)
-	summarize := state.summarizeClosure(context.Background(), main)
-
-	summary, err := summarize([]zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: "history"}})
-	if err != nil || summary != "MAIN SUMMARY" {
-		t.Fatalf("summary = %q, err = %v; want main provider fallback", summary, err)
-	}
-	if factoryCalls != 1 {
-		t.Fatalf("factory calls = %d, want 1 (sticky failure)", factoryCalls)
-	}
-	if _, dedicated := state.summarizeProvider(context.Background(), main); dedicated {
-		t.Fatal("after a factory failure the run must stay on the main provider")
-	}
-	if factoryCalls != 1 {
-		t.Fatalf("factory retried after failure (%d calls)", factoryCalls)
-	}
-}
-
-// Tool payloads are clamped in the summarizer transcript: results to
-// summaryToolResultClamp, call arguments to summaryToolArgsClamp.
-func TestRenderTranscriptClampsToolPayloads(t *testing.T) {
-	bigResult := strings.Repeat("r", 50_000)
-	bigArgs := strings.Repeat("w", 20_000)
-	transcript := renderTranscript([]zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleAssistant, Content: "editing", ToolCalls: []zeroruntime.ToolCall{
-			{ID: "c1", Name: "write_file", Arguments: bigArgs},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "c1", Content: bigResult},
-		{Role: zeroruntime.MessageRoleUser, Content: "keep going"},
-	})
-
-	if len(transcript) > summaryToolResultClamp+summaryToolArgsClamp+1024 {
-		t.Fatalf("transcript is %d bytes; clamps did not apply", len(transcript))
-	}
-	if !strings.Contains(transcript, "chars omitted for summarization") {
-		t.Fatal("clamped transcript must carry the omission marker")
-	}
-	if !strings.Contains(transcript, "keep going") {
-		t.Fatal("non-tool content must survive unclamped")
-	}
-	// Head AND tail of the clamped payloads survive.
-	if !strings.HasPrefix(transcript[strings.Index(transcript, "tool result: ")+len("tool result: "):], "r") ||
-		!strings.Contains(transcript, "rrr\n\nuser: keep going") {
-		t.Fatalf("head/tail of the tool result lost:\n%s", transcript[:200])
-	}
-}
-
-// bigToolHistory returns a history with n large tool results (~40k estimated
-// tokens each): the trailing protection window keeps the newest verbatim,
-// the older ones are prunable.
-func bigToolHistory(n int) []zeroruntime.Message {
-	bigBody := strings.Repeat("x", 160_000)
-	messages := []zeroruntime.Message{{Role: zeroruntime.MessageRoleSystem, Content: "sys"}}
-	for i := 0; i < n; i++ {
-		id := string(rune('a' + i))
-		messages = append(messages,
-			zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{{ID: id, Name: "read_file", Arguments: "{\"path\":\"" + id + "\"}"}}},
-			zeroruntime.Message{Role: zeroruntime.MessageRoleTool, ToolCallID: id, Content: bigBody},
-		)
-	}
-	return append(messages, zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "go"})
-}
-
-func summaryProvider(text string) *mockProvider {
-	return &mockProvider{turns: [][]zeroruntime.StreamEvent{
-		{{Type: zeroruntime.StreamEventText, Content: text}, {Type: zeroruntime.StreamEventDone}},
-		{{Type: zeroruntime.StreamEventText, Content: text}, {Type: zeroruntime.StreamEventDone}},
-	}}
-}
-
-// A context-limit error is first answered with the free prune stage; when the
-// pruned history fits the window the retry is free (no summarizer call) and
-// the one-shot reactive budget is untouched. The paid summarizer only runs
-// when a later error finds nothing left to prune.
-func TestRecoverPrunesBeforeSummarizing(t *testing.T) {
-	provider := summaryProvider("SUMMARY")
-	// The protected trailing tool output (~40k tokens) must fit the window.
-	state := newCompactionState(Options{ContextWindow: 200_000, CompactionPreserveLast: 2}, nil)
-	messages := bigToolHistory(5)
-
-	pruned, retried, err := state.recover(context.Background(), provider, messages, nil, "maximum context length exceeded")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !retried {
-		t.Fatal("prunable history that fits must produce a free retry")
-	}
-	if len(provider.requests) != 0 {
-		t.Fatalf("free prune stage must not call the summarizer (%d requests)", len(provider.requests))
-	}
-	if state.reactiveAttempted {
-		t.Fatal("a free prune retry must not consume the reactive budget")
-	}
-	if estimateTokens(pruned) >= estimateTokens(messages) {
-		t.Fatal("prune did not shrink the history")
-	}
-
-	// Second context-limit error on the pruned history: nothing meaningfully
-	// prunable remains, so the paid summarizer fires and consumes the budget.
-	_, retried, err = state.recover(context.Background(), provider, pruned, nil, "maximum context length exceeded")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !retried {
-		t.Fatal("second recover must compact and retry")
-	}
-	if len(provider.requests) == 0 {
-		t.Fatal("second recover must reach the summarizer")
-	}
-	if !state.reactiveAttempted {
-		t.Fatal("a paid recover must consume the reactive budget")
-	}
-}
-
-// When pruning reclaims something but the pruned history still exceeds the
-// window, recover falls through to the paid summarizer in the SAME call
-// instead of spending a retry that would fail the same way.
-func TestRecoverFallsThroughToSummarizerWhenPruneIsInsufficient(t *testing.T) {
-	provider := summaryProvider("SUMMARY")
-	// A 1,000-token window: even the protected trailing output overflows it.
-	state := newCompactionState(Options{ContextWindow: 1000, CompactionPreserveLast: 2}, nil)
-	messages := bigToolHistory(5)
-
-	compacted, retried, err := state.recover(context.Background(), provider, messages, nil, "maximum context length exceeded")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !retried {
-		t.Fatal("insufficient prune must still end in a retry via summarization")
-	}
-	if len(provider.requests) == 0 {
-		t.Fatal("insufficient prune must reach the summarizer in the same recover call")
-	}
-	if !state.reactiveAttempted {
-		t.Fatal("the paid summarizer consumes the reactive budget")
-	}
-	if estimateTokens(compacted) >= estimateTokens(messages) {
-		t.Fatal("recover did not shrink the history")
-	}
-}
-
-// The free prune stage is not gated behind the one-shot budget: after a paid
-// reactive compaction, a later context-limit error still gets a free retry
-// when pruning makes the history fit.
-func TestRecoverFreePruneRunsAfterBudgetIsSpent(t *testing.T) {
-	provider := summaryProvider("SUMMARY")
-	state := newCompactionState(Options{ContextWindow: 200_000, CompactionPreserveLast: 2}, nil)
-	state.reactiveAttempted = true
-	messages := bigToolHistory(5)
-
-	pruned, retried, err := state.recover(context.Background(), provider, messages, nil, "maximum context length exceeded")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !retried || len(provider.requests) != 0 {
-		t.Fatalf("free prune must retry without the summarizer even when the budget is spent (retried=%v, requests=%d)", retried, len(provider.requests))
-	}
-	if estimateTokens(pruned) >= estimateTokens(messages) {
-		t.Fatal("prune did not shrink the history")
-	}
-	// With nothing left to prune and the budget spent, the caller keeps its
-	// original error — recover neither loops nor summarizes.
-	_, retried, err = state.recover(context.Background(), provider, pruned, nil, "maximum context length exceeded")
-	if err != nil || retried || len(provider.requests) != 0 {
-		t.Fatalf("spent budget must not summarize again (retried=%v, requests=%d, err=%v)", retried, len(provider.requests), err)
-	}
-}
-
-// The free-retry gate compares against the window the provider enforces, not
-// the 70% proactive threshold: a history pruned to ~80% of the window still
-// takes the free retry.
-func TestRecoverFreeRetryGateUsesWindowNotThreshold(t *testing.T) {
-	provider := summaryProvider("SUMMARY")
-	messages := bigToolHistory(5)
-	pruned, _ := pruneStaleToolOutput(messages, 2)
-	prunedTokens := estimateTokens(pruned)
-	// Choose a window so the pruned size sits between 70% and 95% of it.
-	window := prunedTokens * 100 / 80
-	state := newCompactionState(Options{ContextWindow: window, CompactionPreserveLast: 2}, nil)
-	if prunedTokens <= state.threshold {
-		t.Fatalf("test setup: pruned size %d must exceed the proactive threshold %d", prunedTokens, state.threshold)
-	}
-
-	_, retried, err := state.recover(context.Background(), provider, messages, nil, "maximum context length exceeded")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !retried || len(provider.requests) != 0 {
-		t.Fatalf("a history that fits the window must take the free retry (retried=%v, requests=%d)", retried, len(provider.requests))
-	}
-}
-
-// After a mid-run model switch the summarizer is re-resolved against the new
-// main model: a run that started on the cheap model (no dedicated summarizer)
-// and escalated gets a cheap summarizer, and a previously broken one is
-// retried for the new model.
-func TestSwitchModelReresolvesSummarizer(t *testing.T) {
-	cheap := summaryProvider("CHEAP SUMMARY")
-	main := summaryProvider("MAIN SUMMARY")
-	var factoryModels []string
-	state := newCompactionState(Options{
-		ContextWindow:          1000,
-		CompactionPreserveLast: 2,
-		Model:                  "cheap-model",
-		Summarizer: func(_ context.Context, mainModelID string) (Provider, error) {
-			factoryModels = append(factoryModels, mainModelID)
-			if mainModelID == "cheap-model" {
-				return nil, nil // main already is the cheap model
-			}
-			return cheap, nil
-		},
-	}, nil)
-
-	if _, dedicated := state.summarizeProvider(context.Background(), main); dedicated {
-		t.Fatal("on the cheap model the main provider must summarize")
-	}
-	if _, dedicated := state.summarizeProvider(context.Background(), main); dedicated || len(factoryModels) != 1 {
-		t.Fatalf("factory must run once per main model, calls=%v", factoryModels)
-	}
-
-	state.switchModel("big-model", 400_000)
-	if state.threshold != compactionThreshold(400_000) || state.window != 400_000 {
-		t.Fatalf("switchModel must re-derive the window, got threshold=%d window=%d", state.threshold, state.window)
-	}
-	if got, dedicated := state.summarizeProvider(context.Background(), main); !dedicated || got != Provider(cheap) {
-		t.Fatal("after escalating to an expensive model the dedicated cheap summarizer must be used")
-	}
-	if len(factoryModels) != 2 || factoryModels[1] != "big-model" {
-		t.Fatalf("factory must be re-invoked with the new main model, calls=%v", factoryModels)
-	}
-
-	// A broken summarizer is retried after the next switch.
-	state.summarizerBroken = true
-	if _, dedicated := state.summarizeProvider(context.Background(), main); dedicated {
-		t.Fatal("a broken summarizer must fall back to main")
-	}
-	state.switchModel("other-model", 0)
-	if got, dedicated := state.summarizeProvider(context.Background(), main); !dedicated || got != Provider(cheap) {
-		t.Fatal("a model switch must clear the broken flag and rebuild the summarizer")
-	}
-}
-
-func TestCompactionUpdateWindow(t *testing.T) {
-	state := newCompactionState(Options{ContextWindow: 100_000, CompactionPreserveLast: 2}, nil)
-	state.lowWaterMark = 50_000
-	before := state.threshold
-
-	state.updateWindow(0) // unknown model: unchanged
-	if state.threshold != before || state.lowWaterMark != 50_000 {
-		t.Fatal("updateWindow(0) must be a no-op")
-	}
-
-	state.updateWindow(10_000)
-	if state.threshold >= before {
-		t.Fatalf("threshold = %d, want re-derived below %d", state.threshold, before)
-	}
-	if state.lowWaterMark != 0 {
-		t.Fatal("low-water mark must reset on a window change")
-	}
-	if !state.enabled {
-		t.Fatal("a positive window must keep compaction enabled")
-	}
-}
-
-// End-to-end: after escalate_model switches providers, the loop re-derives the
-// context window via ContextWindowFor, visible in the OnContext report.
-func TestRunEscalationRederivesContextWindow(t *testing.T) {
-	registry := tools.NewRegistry()
-	registry.Register(escalatingTool{target: "big-model"})
-	switched := &mockProvider{turns: [][]zeroruntime.StreamEvent{{
-		{Type: zeroruntime.StreamEventText, Content: "done"},
-		{Type: zeroruntime.StreamEventDone},
-	}}}
-	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{{
-		{Type: zeroruntime.StreamEventToolCallStart, ToolCallID: "call-1", ToolName: "escalate"},
-		{Type: zeroruntime.StreamEventToolCallDelta, ToolCallID: "call-1", ArgumentsFragment: `{}`},
-		{Type: zeroruntime.StreamEventToolCallEnd, ToolCallID: "call-1"},
-		{Type: zeroruntime.StreamEventDone},
-	}}}
-
-	var windows []int
-	result, err := Run(context.Background(), "go", provider, Options{
-		Registry:      registry,
-		ContextWindow: 100_000,
-		Model:         "small-model",
-		ModelSwitcher: func(context.Context, string) (Provider, error) { return switched, nil },
-		ContextWindowFor: func(modelID string) int {
-			if modelID == "big-model" {
-				return 400_000
-			}
-			return 0
-		},
-		OnContext: func(breakdown ContextBreakdown) { windows = append(windows, breakdown.ContextWindow) },
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if result.FinalAnswer != "done" {
-		t.Fatalf("final answer = %q", result.FinalAnswer)
-	}
-	if len(windows) < 2 {
-		t.Fatalf("expected at least 2 OnContext reports, got %d", len(windows))
-	}
-	if windows[0] != 100_000 {
-		t.Fatalf("turn 1 window = %d, want the original 100000", windows[0])
-	}
-	if windows[len(windows)-1] != 400_000 {
-		t.Fatalf("post-escalation window = %d, want 400000", windows[len(windows)-1])
-	}
-}
-
-// nonComparableProvider has a slice field, so comparing two Provider interface
-// values holding it would panic; the summarizer path must never compare them.
-type nonComparableProvider struct {
-	inner *mockProvider
-	tags  []string
-}
-
-func (p nonComparableProvider) StreamCompletion(ctx context.Context, request zeroruntime.CompletionRequest) (<-chan zeroruntime.StreamEvent, error) {
-	return p.inner.StreamCompletion(ctx, request)
-}
-
-func TestSummarizeClosureNeverComparesProviderValues(t *testing.T) {
-	broken := &mockProvider{turns: [][]zeroruntime.StreamEvent{{
-		{Type: zeroruntime.StreamEventError, Error: "boom: model not found"},
-	}}}
-	main := nonComparableProvider{inner: summaryProvider("MAIN SUMMARY"), tags: []string{"x"}}
-	state := newCompactionState(Options{
-		ContextWindow:          1000,
-		CompactionPreserveLast: 2,
-		Summarizer:             func(context.Context, string) (Provider, error) { return nonComparableProvider{inner: broken}, nil },
-	}, nil)
-	summary, err := state.summarizeClosure(context.Background(), main)([]zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: "history"}})
-	if err != nil || summary != "MAIN SUMMARY" {
-		t.Fatalf("fallback with non-comparable providers must not panic and must use main, got %q err=%v", summary, err)
-	}
-	// And with no dedicated summarizer at all the closure still works.
-	state = newCompactionState(Options{ContextWindow: 1000, CompactionPreserveLast: 2}, nil)
-	if _, err := state.summarizeClosure(context.Background(), main)([]zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: "history"}}); err != nil {
-		t.Fatal(err)
-	}
-}

internal/agent/compaction_metadata_test.go

@@ -1,167 +0,0 @@
-package agent
-
-import (
-	"errors"
-	"reflect"
-	"strings"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-func TestCompactMessagesReturnsMetadataForManualCompaction(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system prompt"},
-		{Role: zeroruntime.MessageRoleUser, Content: "first question"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "first answer"},
-		{Role: zeroruntime.MessageRoleUser, Content: "second question"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "recent answer"},
-		{Role: zeroruntime.MessageRoleUser, Content: "latest question"},
-	}
-
-	var captured []zeroruntime.Message
-	result, err := CompactMessages(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize: func(toSummarize []zeroruntime.Message) (string, error) {
-			captured = append([]zeroruntime.Message(nil), toSummarize...)
-			return "  manual summary  ", nil
-		},
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if !result.Compacted {
-		t.Fatal("expected compaction to be reported")
-	}
-	if result.RemovedCount != 3 {
-		t.Fatalf("RemovedCount = %d, want 3", result.RemovedCount)
-	}
-	if result.PreservedCount != 3 {
-		t.Fatalf("PreservedCount = %d, want 3", result.PreservedCount)
-	}
-	if result.SummaryText != "manual summary" {
-		t.Fatalf("SummaryText = %q, want trimmed summary", result.SummaryText)
-	}
-	if result.ProjectedChars != compactionMessageChars(captured) || result.ProjectedChars == 0 {
-		t.Fatalf("ProjectedChars = %d, want %d", result.ProjectedChars, compactionMessageChars(captured))
-	}
-	if result.Truncated {
-		t.Fatal("Truncated = true for a projection within its limits")
-	}
-	if len(captured) != 1 || !strings.Contains(captured[0].Content, "first question") || !strings.Contains(captured[0].Content, "second question") {
-		t.Fatalf("summarized projection = %#v, want intent from the non-preserved middle", captured)
-	}
-	if len(result.Messages) != 4 {
-		t.Fatalf("compacted message count = %d, want 4", len(result.Messages))
-	}
-	if result.Messages[0].Content != "system prompt" {
-		t.Fatalf("system message was not preserved at head: %#v", result.Messages)
-	}
-	if result.Messages[1].Role != zeroruntime.MessageRoleUser {
-		t.Fatalf("summary message role = %s, want user", result.Messages[1].Role)
-	}
-	if !strings.Contains(result.Messages[1].Content, summaryLabel) || !strings.Contains(result.Messages[1].Content, "manual summary") {
-		t.Fatalf("summary message did not include label and body: %q", result.Messages[1].Content)
-	}
-	if result.Messages[2].Content != "recent answer" || result.Messages[3].Content != "latest question" {
-		t.Fatalf("preserved suffix changed: %#v", result.Messages[2:])
-	}
-}
-
-func TestCompactMessagesNoopReturnsUncompactedMetadata(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "hi"},
-	}
-	called := false
-
-	result, err := CompactMessages(messages, CompactionOptions{
-		PreserveLast: 8,
-		Summarize: func([]zeroruntime.Message) (string, error) {
-			called = true
-			return "summary", nil
-		},
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if called {
-		t.Fatal("Summarize should not be called for a no-op compaction")
-	}
-	if result.Compacted {
-		t.Fatal("Compacted = true for a no-op")
-	}
-	if result.RemovedCount != 0 {
-		t.Fatalf("RemovedCount = %d, want 0", result.RemovedCount)
-	}
-	if result.PreservedCount != len(messages) {
-		t.Fatalf("PreservedCount = %d, want %d", result.PreservedCount, len(messages))
-	}
-	if result.SummaryText != "" {
-		t.Fatalf("SummaryText = %q, want empty", result.SummaryText)
-	}
-	if result.ProjectedChars != 0 || result.Truncated {
-		t.Fatalf("no-op projection metadata = (%d, %t), want zero values", result.ProjectedChars, result.Truncated)
-	}
-	if !reflect.DeepEqual(result.Messages, messages) {
-		t.Fatalf("Messages changed on no-op: %#v", result.Messages)
-	}
-}
-
-func TestCompactMessagesReturnsTruncatedProjectionMetadata(t *testing.T) {
-	messages := []zeroruntime.Message{{Role: zeroruntime.MessageRoleSystem, Content: "system"}}
-	for index := range 20 {
-		messages = append(messages, zeroruntime.Message{
-			Role:    zeroruntime.MessageRoleUser,
-			Content: strings.Repeat("contextword ", 256) + string(rune('a'+index)),
-		})
-	}
-	messages = append(messages,
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "recent answer"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "latest question"},
-	)
-
-	var captured []zeroruntime.Message
-	result, err := CompactMessages(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize: func(toSummarize []zeroruntime.Message) (string, error) {
-			captured = append([]zeroruntime.Message(nil), toSummarize...)
-			return "bounded summary", nil
-		},
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !result.Compacted || !result.Truncated {
-		t.Fatalf("compaction metadata = compacted %t, truncated %t; want both true", result.Compacted, result.Truncated)
-	}
-	if result.ProjectedChars != compactionMessageChars(captured) || result.ProjectedChars == 0 {
-		t.Fatalf("ProjectedChars = %d, want %d", result.ProjectedChars, compactionMessageChars(captured))
-	}
-}
-
-func TestCompactMessagesPropagatesSummarizeError(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "first question"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "first answer"},
-		{Role: zeroruntime.MessageRoleUser, Content: "second question"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "recent answer"},
-		{Role: zeroruntime.MessageRoleUser, Content: "latest question"},
-	}
-
-	_, err := CompactMessages(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize: func([]zeroruntime.Message) (string, error) {
-			return "", errors.New("summarizer unavailable")
-		},
-	})
-	if err == nil {
-		t.Fatal("expected summarizer error")
-	}
-	if !strings.Contains(err.Error(), "summarizer unavailable") {
-		t.Fatalf("unexpected error: %v", err)
-	}
-}

internal/agent/compaction_preserve.go

@@ -1,824 +0,0 @@
-package agent
-
-import (
-	"encoding/json"
-	"strings"
-	"unicode/utf8"
-
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-// Compaction preservation.
-//
-// A plain prose summary loses structured state the model needs to keep working:
-// the active plan, loaded deferred-tool schemas, loaded skills, and project
-// instruction blocks. When those turns fall into the elided middle, Compact
-// appends that state to the injected summary as JSON so it survives exactly
-// rather than being paraphrased away.
-
-const (
-	toolNameUpdatePlan = "update_plan"
-	toolNameToolSearch = "tool_search"
-	toolNameSkill      = "skill"
-	toolNameWriteFile  = "write_file"
-	toolNameEditFile   = "edit_file"
-)
-
-// maxRecentEdits caps how many edited files are carried across a compaction, and
-// maxEditNoteBytes caps each edit's one-line note, so a long editing run can't
-// bloat the preserved-state block.
-const (
-	maxRecentEdits   = 20
-	maxEditNoteBytes = 160
-	// maxTaskObjectiveBytes keeps the original objective recognizable after
-	// compaction without allowing an unusually large prompt to recreate the
-	// context pressure the compaction just removed.
-	maxTaskObjectiveBytes = 512
-)
-
-const (
-	projectInstructionsHeadingPrefix = "# "
-	projectInstructionsHeadingMarker = " instructions for "
-	projectInstructionsOpenTag       = "<INSTRUCTIONS>"
-	projectInstructionsCloseTag      = "</INSTRUCTIONS>"
-)
-
-// preservedStateLabel heads the preserved-state block. Keep this label stable so
-// summaries created by earlier builds remain parseable; the JSON body may carry
-// more fields than the historical label names.
-//
-// The block body is a single line of JSON (see formatPreservedState): JSON
-// escapes everything, so markdown headings, code fences, or quotes round-trip
-// losslessly across repeated compactions.
-const preservedStateLabel = "## Preserved state (active plan + loaded skills; carried across compaction)"
-
-// maxPreservedSkillBytes caps how much of each loaded skill body is carried
-// across a compaction, so a large skill can't defeat the compaction it is part
-// of. The skill's name and head survive; the model can re-load it in full if it
-// needs the rest.
-const maxPreservedSkillBytes = 2 << 10 // 2 KiB
-
-// extractLatestPlan returns a formatted view of the most recent update_plan tool
-// call in messages, so an in-progress plan survives when its turns are elided by
-// compaction. Returns "" when no plan was issued.
-func extractLatestPlan(messages []zeroruntime.Message) string {
-	for i := len(messages) - 1; i >= 0; i-- {
-		calls := messages[i].ToolCalls
-		for j := len(calls) - 1; j >= 0; j-- {
-			if calls[j].Name != toolNameUpdatePlan {
-				continue
-			}
-			if formatted := formatPlanArguments(calls[j].Arguments); formatted != "" {
-				return formatted
-			}
-		}
-	}
-	return ""
-}
-
-// formatPlanArguments renders an update_plan tool call's JSON arguments
-// ({"plan":[{content,status,...}]}) as terse status-tagged bullet lines. Returns
-// "" on malformed arguments or an empty plan.
-func formatPlanArguments(arguments string) string {
-	plan, ok := parseTaskPlan(arguments)
-	if !ok {
-		return ""
-	}
-	lines := make([]string, 0, len(plan))
-	for _, item := range plan {
-		line := "- [" + item.Status + "] " + item.Content
-		if notes := item.Notes; notes != "" {
-			line += "\n  Notes: " + notes
-		}
-		lines = append(lines, line)
-	}
-	return strings.Join(lines, "\n")
-}
-
-// skillEntry is a named preserved body. It began as loaded-skill state and is
-// reused for loaded tools, project instruction blocks, and recent file edits.
-type skillEntry struct {
-	name string
-	body string
-}
-
-// recentEdits returns files mutated by editing calls in messages
-// — latest note per path, in last-seen order — as skillEntry{name: path, body:
-// note}. After compaction elides the editing turns, this tells the model WHAT it
-// changed in each file (from the tool's result) so it need not re-read to
-// rediscover its own footprint. Capped at maxRecentEdits paths.
-//
-// Ordering is by LAST edit, not first: re-editing a file moves it to the newest
-// position so the tail cap below keeps the file the model most recently touched
-// rather than an earlier, now-stale entry.
-func recentEdits(messages []zeroruntime.Message) []skillEntry {
-	pathByID := map[string]string{}
-	noteByPath := map[string]string{}
-	sequence := make([]string, 0)
-	for _, message := range messages {
-		for _, call := range message.ToolCalls {
-			if call.Name != toolNameWriteFile && call.Name != toolNameEditFile {
-				continue
-			}
-			path := editPathFromArguments(call.Arguments)
-			if path == "" {
-				continue
-			}
-			if call.ID != "" {
-				pathByID[call.ID] = path
-			}
-			sequence = append(sequence, path)
-		}
-	}
-	for _, message := range messages {
-		if message.Role != zeroruntime.MessageRoleTool || len(message.ChangedFiles) == 0 {
-			continue
-		}
-		for _, path := range message.ChangedFiles {
-			path = strings.TrimSpace(path)
-			if path == "" {
-				continue
-			}
-			sequence = append(sequence, path)
-			noteByPath[path] = editNote(message.Content)
-		}
-	}
-	order := lastSeenOrder(sequence)
-	if len(order) == 0 {
-		return nil
-	}
-
-	for _, message := range messages {
-		if message.Role != zeroruntime.MessageRoleTool || message.ToolCallID == "" {
-			continue
-		}
-		if path, ok := pathByID[message.ToolCallID]; ok {
-			noteByPath[path] = editNote(message.Content)
-		}
-	}
-
-	// Keep the most recent maxRecentEdits paths (the tail of last-seen order).
-	if len(order) > maxRecentEdits {
-		order = order[len(order)-maxRecentEdits:]
-	}
-	entries := make([]skillEntry, 0, len(order))
-	for _, path := range order {
-		entries = append(entries, skillEntry{name: path, body: noteByPath[path]})
-	}
-	return entries
-}
-
-// lastSeenOrder dedupes paths keeping each at its LAST occurrence, preserving
-// chronological order otherwise. A re-edited path therefore lands at the newest
-// position rather than staying pinned to where it first appeared.
-func lastSeenOrder(paths []string) []string {
-	lastIdx := make(map[string]int, len(paths))
-	for i, p := range paths {
-		lastIdx[p] = i
-	}
-	order := make([]string, 0, len(lastIdx))
-	for i, p := range paths {
-		if lastIdx[p] == i {
-			order = append(order, p)
-		}
-	}
-	return order
-}
-
-// editPathFromArguments pulls the target file path from a write_file/edit_file
-// call's JSON arguments (path/file/file_path/filename aliases). Returns "" on
-// malformed arguments or no path.
-func editPathFromArguments(arguments string) string {
-	var parsed struct {
-		Path     string `json:"path"`
-		File     string `json:"file"`
-		FilePath string `json:"file_path"`
-		Filename string `json:"filename"`
-	}
-	if err := json.Unmarshal([]byte(strings.TrimSpace(arguments)), &parsed); err != nil {
-		return ""
-	}
-	for _, candidate := range []string{parsed.Path, parsed.File, parsed.FilePath, parsed.Filename} {
-		if s := strings.TrimSpace(candidate); s != "" {
-			return s
-		}
-	}
-	return ""
-}
-
-// editNote reduces an edit tool's result to a single short line (its first
-// non-empty line, byte-capped on a rune boundary) for the preserved summary.
-func editNote(content string) string {
-	for _, line := range strings.Split(content, "\n") {
-		s := strings.TrimSpace(line)
-		if s == "" {
-			continue
-		}
-		if len(s) > maxEditNoteBytes {
-			limit := maxEditNoteBytes
-			for limit > 0 && !utf8.RuneStart(s[limit]) {
-				limit--
-			}
-			s = s[:limit] + "…"
-		}
-		return s
-	}
-	return ""
-}
-
-// loadedSkills returns the skills loaded via the skill tool in messages — the
-// latest body per name, in first-seen order — matching each skill tool call to
-// its tool result by id.
-func loadedSkills(messages []zeroruntime.Message) []skillEntry {
-	nameByID := map[string]string{}
-	for _, message := range messages {
-		for _, call := range message.ToolCalls {
-			if call.Name == toolNameSkill && call.ID != "" {
-				nameByID[call.ID] = skillNameFromArguments(call.Arguments)
-			}
-		}
-	}
-	if len(nameByID) == 0 {
-		return nil
-	}
-
-	bodyByName := map[string]string{}
-	nameOrder := make([]string, 0, len(nameByID))
-	for _, message := range messages {
-		if message.Role != zeroruntime.MessageRoleTool || message.ToolCallID == "" {
-			continue
-		}
-		name, ok := nameByID[message.ToolCallID]
-		if !ok {
-			continue
-		}
-		if name == "" {
-			name = "(unnamed)"
-		}
-		body := strings.TrimSpace(message.Content)
-		if body == "" {
-			continue
-		}
-		if _, seen := bodyByName[name]; !seen {
-			nameOrder = append(nameOrder, name)
-		}
-		bodyByName[name] = capBody(body)
-	}
-
-	entries := make([]skillEntry, 0, len(nameOrder))
-	for _, name := range nameOrder {
-		entries = append(entries, skillEntry{name: name, body: bodyByName[name]})
-	}
-	return entries
-}
-
-// loadedToolSchemas returns tool_search-loaded schemas from their normal tool
-// result text. ToolResult.Meta is not part of zeroruntime.Message history, so the
-// rendered "Loaded N tools" output is the durable transcript format.
-func loadedToolSchemas(messages []zeroruntime.Message) []skillEntry {
-	toolSearchIDs := map[string]bool{}
-	for _, message := range messages {
-		for _, call := range message.ToolCalls {
-			if call.Name == toolNameToolSearch && call.ID != "" {
-				toolSearchIDs[call.ID] = true
-			}
-		}
-	}
-	if len(toolSearchIDs) == 0 {
-		return nil
-	}
-
-	bodyByName := map[string]string{}
-	nameOrder := make([]string, 0)
-	for _, message := range messages {
-		if message.Role != zeroruntime.MessageRoleTool || !toolSearchIDs[message.ToolCallID] {
-			continue
-		}
-		for _, entry := range loadedToolEntriesFromOutput(message.Content) {
-			if _, seen := bodyByName[entry.name]; !seen {
-				nameOrder = append(nameOrder, entry.name)
-			}
-			bodyByName[entry.name] = entry.body
-		}
-	}
-
-	entries := make([]skillEntry, 0, len(nameOrder))
-	for _, name := range nameOrder {
-		entries = append(entries, skillEntry{name: name, body: bodyByName[name]})
-	}
-	return entries
-}
-
-func loadedToolEntriesFromOutput(output string) []skillEntry {
-	output = strings.TrimSpace(output)
-	if !strings.HasPrefix(output, "Loaded ") || !strings.Contains(output, "Full schemas follow") {
-		return nil
-	}
-	lines := strings.Split(output, "\n")
-	var entries []skillEntry
-	for i := 0; i < len(lines); i++ {
-		name, ok := strings.CutPrefix(strings.TrimSpace(lines[i]), "## ")
-		if !ok {
-			continue
-		}
-		name = strings.TrimSpace(name)
-		if name == "" {
-			continue
-		}
-		start := i
-		end := len(lines)
-		for j := i + 1; j < len(lines); j++ {
-			if strings.HasPrefix(strings.TrimSpace(lines[j]), "## ") {
-				end = j
-				break
-			}
-		}
-		entries = append(entries, skillEntry{name: name, body: capBody(strings.TrimSpace(strings.Join(lines[start:end], "\n")))})
-		i = end - 1
-	}
-	return entries
-}
-
-func projectInstructionEntries(messages []zeroruntime.Message) []skillEntry {
-	bodyBySource := map[string]string{}
-	sourceOrder := make([]string, 0)
-	for _, message := range messages {
-		if message.Role != zeroruntime.MessageRoleUser {
-			continue
-		}
-		source, body := projectInstructionBlock(message.Content)
-		if body == "" {
-			continue
-		}
-		if _, seen := bodyBySource[source]; !seen {
-			sourceOrder = append(sourceOrder, source)
-		}
-		bodyBySource[source] = body
-	}
-
-	entries := make([]skillEntry, 0, len(sourceOrder))
-	for _, source := range sourceOrder {
-		entries = append(entries, skillEntry{name: source, body: bodyBySource[source]})
-	}
-	return entries
-}
-
-func projectInstructionBlock(content string) (string, string) {
-	content = strings.TrimSpace(content)
-	if !strings.HasPrefix(content, projectInstructionsHeadingPrefix) {
-		return "", ""
-	}
-	firstLineEnd := strings.IndexByte(content, '\n')
-	if firstLineEnd < 0 {
-		return "", ""
-	}
-	heading := strings.TrimSpace(content[:firstLineEnd])
-	if !strings.Contains(heading, projectInstructionsHeadingMarker) {
-		return "", ""
-	}
-	open := strings.Index(content, projectInstructionsOpenTag)
-	close := strings.Index(content, projectInstructionsCloseTag)
-	if open < 0 || close < open {
-		return "", ""
-	}
-	close += len(projectInstructionsCloseTag)
-
-	source := strings.TrimPrefix(heading, "# ")
-	body := strings.TrimSpace(heading + "\n\n" + strings.TrimSpace(content[open:close]))
-	return source, body
-}
-
-// skillNameFromArguments pulls the "name" field from a skill tool call's JSON
-// arguments ({"name":"..."}). Returns "" on malformed arguments.
-func skillNameFromArguments(arguments string) string {
-	var parsed struct {
-		Name  string `json:"name"`
-		Skill string `json:"skill"`
-	}
-	if err := json.Unmarshal([]byte(strings.TrimSpace(arguments)), &parsed); err != nil {
-		return ""
-	}
-	if name := strings.TrimSpace(parsed.Name); name != "" {
-		return name
-	}
-	return strings.TrimSpace(parsed.Skill)
-}
-
-// truncationNote is appended to a capped skill body. Its length is reserved
-// within the byte budget so the result never exceeds maxPreservedSkillBytes.
-const truncationNote = "\n… (truncated; re-load the skill for the full body)"
-
-// capBody truncates an over-long skill body to maxPreservedSkillBytes BYTES,
-// cutting on a UTF-8 rune boundary (never splitting a multibyte rune) and
-// reserving room for the note so the result stays within the byte budget. The
-// note is added only when the body is actually truncated.
-func capBody(body string) string {
-	if len(body) <= maxPreservedSkillBytes {
-		return body
-	}
-	limit := maxPreservedSkillBytes - len(truncationNote)
-	if limit < 0 {
-		limit = 0
-	}
-	// Walk back to the start of a rune so a multibyte sequence is never split.
-	for limit > 0 && !utf8.RuneStart(body[limit]) {
-		limit--
-	}
-	return body[:limit] + truncationNote
-}
-
-// preservedState is the JSON shape of the carried-across-compaction block.
-type preservedState struct {
-	Plan                string                 `json:"plan,omitempty"`
-	Task                *preservedTaskState    `json:"task,omitempty"`
-	RecentEdits         []preservedEdit        `json:"recent_edits,omitempty"`
-	Tools               []preservedTool        `json:"tools,omitempty"`
-	Skills              []preservedSkill       `json:"skills,omitempty"`
-	ProjectInstructions []preservedInstruction `json:"project_instructions,omitempty"`
-}
-
-type preservedTaskState struct {
-	Objective           string              `json:"objective"`
-	Status              taskStatus          `json:"status,omitempty"`
-	Pending             int                 `json:"pending,omitempty"`
-	InProgress          int                 `json:"in_progress,omitempty"`
-	Completed           int                 `json:"completed,omitempty"`
-	Failed              int                 `json:"failed,omitempty"`
-	VerificationPassed  int                 `json:"verification_passed,omitempty"`
-	VerificationFailed  int                 `json:"verification_failed,omitempty"`
-	VerificationOutcome Outcome             `json:"verification_outcome,omitempty"`
-	Constraints         []string            `json:"constraints,omitempty"`
-	ChangedFiles        []string            `json:"changed_files,omitempty"`
-	UnresolvedFailures  []taskFailureState  `json:"unresolved_failures,omitempty"`
-	Approvals           []taskApprovalState `json:"approvals,omitempty"`
-	Artifacts           []taskArtifactState `json:"artifacts,omitempty"`
-}
-
-type preservedEdit struct {
-	Path string `json:"path"`
-	Note string `json:"note,omitempty"`
-}
-
-type preservedTool struct {
-	Name string `json:"name"`
-	Body string `json:"body"`
-}
-
-type preservedSkill struct {
-	Name string `json:"name"`
-	Body string `json:"body"`
-}
-
-type preservedInstruction struct {
-	Source string `json:"source"`
-	Body   string `json:"body"`
-}
-
-// appendPreservedState appends active structured state to a compaction summary
-// as a single JSON block. middle is the slice being summarized away.
-//
-// It is robust across repeated compactions: after the first compaction the state
-// may live only inside the injected summary message, which on a later compaction
-// lands in middle with no real tool calls left to extract. Fresh tool calls and
-// instruction blocks override the carried-forward copy by name/source.
-func appendPreservedState(summary string, middle []zeroruntime.Message, taskSnapshot *taskStateSnapshot) string {
-	priorState := parsePreservedStateBlock(latestSummaryContent(middle))
-	task := priorState.Task
-	if taskSnapshot != nil {
-		task = &preservedTaskState{
-			Objective:          capTaskObjective(taskSnapshot.Objective),
-			Constraints:        mergeBoundedComparable(priorTaskConstraints(priorState.Task), taskSnapshot.Constraints, maxTaskConstraints),
-			ChangedFiles:       mergeBoundedComparable(priorTaskChangedFiles(priorState.Task), taskSnapshot.ChangedFiles, maxTaskEvidenceEntries),
-			UnresolvedFailures: mergeTaskFailures(priorTaskFailures(priorState.Task), taskSnapshot.UnresolvedFailures, taskSnapshot.ResolvedFailureKeys),
-			Approvals:          mergeBoundedComparable(priorTaskApprovals(priorState.Task), taskSnapshot.Approvals, maxTaskEvidenceEntries),
-			Artifacts:          mergeBoundedComparable(priorTaskArtifacts(priorState.Task), taskSnapshot.Artifacts, maxTaskEvidenceEntries),
-		}
-		// Plan parity corroborates only the mutable task projection. The objective
-		// comes directly from the run prompt and is immutable, so it must survive
-		// even after compaction removes the plan tool call needed for comparison.
-		if taskSnapshot.PlanParity == taskPlanParityMatch {
-			task.Status = taskSnapshot.Status
-			task.Pending = taskSnapshot.Plan.Pending
-			task.InProgress = taskSnapshot.Plan.InProgress
-			task.Completed = taskSnapshot.Plan.Completed
-			task.Failed = taskSnapshot.Plan.Failed
-			task.VerificationPassed = taskSnapshot.Verification.Passed
-			task.VerificationFailed = taskSnapshot.Verification.Failed
-			task.VerificationOutcome = taskSnapshot.Verification.LastOutcome
-		}
-	}
-	freshConstraints := explicitConstraintsFromMessages(middle)
-	if len(freshConstraints) > 0 {
-		if task == nil {
-			task = &preservedTaskState{}
-		}
-		task.Constraints = mergeBoundedComparable(task.Constraints, freshConstraints, maxTaskConstraints)
-	}
-
-	// Plan: a fresh update_plan in middle is authoritative; otherwise carry the
-	// plan preserved by an earlier compaction.
-	plan := extractLatestPlan(middle)
-	if plan == "" {
-		plan = priorState.Plan
-	}
-
-	// Recent edits: merge edits preserved earlier with fresh write_file/edit_file
-	// results in middle (newer note per path wins AND moves to the newest
-	// position), so the tail cap keeps the files the model most recently touched
-	// across repeated compactions rather than dropping a just-re-edited file.
-	edits := capRecentEdits(mergeRecentEdits(preservedEditsToEntries(priorState.RecentEdits), recentEdits(middle)))
-
-	// Tools: preserve deferred tool_search schemas from the transcript. Fresh
-	// loads override older carried copies by name.
-	tools := mergeSkillEntries(preservedToolsToEntries(priorState.Tools), loadedToolSchemas(middle))
-
-	// Skills: merge skills preserved earlier (older) with fresh loads (newer wins
-	// per name), so a loaded skill survives repeated compactions.
-	skills := mergeSkillEntries(preservedSkillsToEntries(priorState.Skills), loadedSkills(middle))
-
-	instructions := mergeSkillEntries(
-		preservedInstructionsToEntries(priorState.ProjectInstructions),
-		projectInstructionEntries(middle),
-	)
-
-	if block := formatPreservedState(plan, task, edits, tools, skills, instructions); block != "" {
-		summary += "\n\n" + block
-	}
-	return summary
-}
-
-func explicitConstraintsFromMessages(messages []zeroruntime.Message) []string {
-	var constraints []string
-	for _, message := range messages {
-		if message.Role != zeroruntime.MessageRoleUser || strings.Contains(message.Content, preservedStateLabel) {
-			continue
-		}
-		if _, body := projectInstructionBlock(message.Content); body != "" {
-			continue
-		}
-		constraints = mergeBoundedComparable(constraints, extractExplicitConstraints(message.Content), maxTaskConstraints)
-	}
-	return constraints
-}
-
-func priorTaskConstraints(task *preservedTaskState) []string {
-	if task == nil {
-		return nil
-	}
-	return task.Constraints
-}
-
-func priorTaskChangedFiles(task *preservedTaskState) []string {
-	if task == nil {
-		return nil
-	}
-	return task.ChangedFiles
-}
-
-func priorTaskFailures(task *preservedTaskState) []taskFailureState {
-	if task == nil {
-		return nil
-	}
-	return task.UnresolvedFailures
-}
-
-func priorTaskApprovals(task *preservedTaskState) []taskApprovalState {
-	if task == nil {
-		return nil
-	}
-	return task.Approvals
-}
-
-func priorTaskArtifacts(task *preservedTaskState) []taskArtifactState {
-	if task == nil {
-		return nil
-	}
-	return task.Artifacts
-}
-
-func mergeTaskFailures(older, newer []taskFailureState, resolved []string) []taskFailureState {
-	resolvedSet := make(map[string]struct{}, len(resolved))
-	for _, key := range resolved {
-		resolvedSet[key] = struct{}{}
-	}
-	merged := make([]taskFailureState, 0, len(older)+len(newer))
-	for _, failure := range append(append([]taskFailureState(nil), older...), newer...) {
-		if _, ok := resolvedSet[failure.Key]; ok {
-			continue
-		}
-		withoutSameKey := make([]taskFailureState, 0, len(merged))
-		for _, existing := range merged {
-			if existing.Key != failure.Key {
-				withoutSameKey = append(withoutSameKey, existing)
-			}
-		}
-		merged = append(withoutSameKey, failure)
-	}
-	if len(merged) > maxTaskEvidenceEntries {
-		merged = merged[len(merged)-maxTaskEvidenceEntries:]
-	}
-	return merged
-}
-
-func mergeBoundedComparable[T comparable](older, newer []T, limit int) []T {
-	merged := make([]T, 0, len(older)+len(newer))
-	seen := make(map[T]struct{}, len(older)+len(newer))
-	for _, value := range append(append([]T(nil), older...), newer...) {
-		if _, ok := seen[value]; ok {
-			continue
-		}
-		seen[value] = struct{}{}
-		merged = append(merged, value)
-	}
-	if len(merged) > limit {
-		merged = merged[len(merged)-limit:]
-	}
-	return merged
-}
-
-func capTaskObjective(objective string) string {
-	objective = strings.TrimSpace(objective)
-	if len(objective) <= maxTaskObjectiveBytes {
-		return objective
-	}
-	const suffix = "…"
-	limit := maxTaskObjectiveBytes - len(suffix)
-	for limit > 0 && !utf8.RuneStart(objective[limit]) {
-		limit--
-	}
-	return strings.TrimSpace(objective[:limit]) + suffix
-}
-
-// mergeRecentEdits overlays fresh edits onto edits preserved by an earlier
-// compaction. Unlike mergeSkillEntries (which keeps refreshed entries in their
-// original slot), a path touched again by a fresh edit MOVES to the newest
-// position and takes the fresh note, so capRecentEdits — which keeps only the
-// most-recent tail — never drops a file the model just re-edited. Paths present
-// only in the older set keep their relative order, ahead of the fresh ones.
-func mergeRecentEdits(older, newer []skillEntry) []skillEntry {
-	if len(newer) == 0 {
-		return older
-	}
-	freshBody := make(map[string]string, len(newer))
-	freshOrder := make([]string, 0, len(newer))
-	for _, e := range newer {
-		if _, ok := freshBody[e.name]; !ok {
-			freshOrder = append(freshOrder, e.name)
-		}
-		freshBody[e.name] = e.body
-	}
-	merged := make([]skillEntry, 0, len(older)+len(freshOrder))
-	// Older entries that were NOT re-edited keep their position, oldest first.
-	for _, e := range older {
-		if _, refreshed := freshBody[e.name]; refreshed {
-			continue // re-appended at its newest position below
-		}
-		merged = append(merged, e)
-	}
-	// Fresh edits follow, in last-seen order, each carrying the fresh note — so
-	// the most recently touched files sit at the tail the cap preserves.
-	for _, name := range freshOrder {
-		merged = append(merged, skillEntry{name: name, body: freshBody[name]})
-	}
-	return merged
-}
-
-// capRecentEdits bounds the preserved edit list to the most recent maxRecentEdits
-// entries after a merge, so repeated compactions can't grow it without limit.
-func capRecentEdits(entries []skillEntry) []skillEntry {
-	if len(entries) > maxRecentEdits {
-		return entries[len(entries)-maxRecentEdits:]
-	}
-	return entries
-}
-
-func preservedEditsToEntries(edits []preservedEdit) []skillEntry {
-	entries := make([]skillEntry, 0, len(edits))
-	for _, e := range edits {
-		if e.Path == "" {
-			continue
-		}
-		entries = append(entries, skillEntry{name: e.Path, body: e.Note})
-	}
-	return entries
-}
-
-// formatPreservedState renders state as the labelled, single-line
-// JSON block. Returns "" when there is nothing to preserve.
-func formatPreservedState(plan string, task *preservedTaskState, edits, tools, skills, instructions []skillEntry) string {
-	if plan == "" && task == nil && len(edits) == 0 && len(tools) == 0 && len(skills) == 0 && len(instructions) == 0 {
-		return ""
-	}
-	state := preservedState{Plan: plan, Task: task}
-	for _, e := range edits {
-		state.RecentEdits = append(state.RecentEdits, preservedEdit{Path: e.name, Note: e.body})
-	}
-	for _, t := range tools {
-		state.Tools = append(state.Tools, preservedTool{Name: t.name, Body: t.body})
-	}
-	for _, s := range skills {
-		state.Skills = append(state.Skills, preservedSkill{Name: s.name, Body: s.body})
-	}
-	for _, i := range instructions {
-		state.ProjectInstructions = append(state.ProjectInstructions, preservedInstruction{Source: i.name, Body: i.body})
-	}
-	encoded, err := json.Marshal(state)
-	if err != nil {
-		return ""
-	}
-	return preservedStateLabel + "\n" + string(encoded)
-}
-
-func parsePreservedStateBlock(summaryContent string) preservedState {
-	idx := strings.LastIndex(summaryContent, preservedStateLabel)
-	if idx < 0 {
-		return preservedState{}
-	}
-	rest := strings.TrimPrefix(summaryContent[idx+len(preservedStateLabel):], "\n")
-	// The JSON is a single line (json.Marshal escapes newlines).
-	if nl := strings.IndexByte(rest, '\n'); nl >= 0 {
-		rest = rest[:nl]
-	}
-	rest = strings.TrimSpace(rest)
-	if rest == "" {
-		return preservedState{}
-	}
-	var state preservedState
-	if err := json.Unmarshal([]byte(rest), &state); err != nil {
-		return preservedState{}
-	}
-	return state
-}
-
-func preservedToolsToEntries(tools []preservedTool) []skillEntry {
-	entries := make([]skillEntry, 0, len(tools))
-	for _, t := range tools {
-		if t.Name == "" {
-			continue
-		}
-		entries = append(entries, skillEntry{name: t.Name, body: t.Body})
-	}
-	return entries
-}
-
-func preservedSkillsToEntries(skills []preservedSkill) []skillEntry {
-	entries := make([]skillEntry, 0, len(skills))
-	for _, s := range skills {
-		if s.Name == "" {
-			continue
-		}
-		entries = append(entries, skillEntry{name: s.Name, body: s.Body})
-	}
-	return entries
-}
-
-func preservedInstructionsToEntries(instructions []preservedInstruction) []skillEntry {
-	entries := make([]skillEntry, 0, len(instructions))
-	for _, i := range instructions {
-		if i.Source == "" {
-			continue
-		}
-		entries = append(entries, skillEntry{name: i.Source, body: i.Body})
-	}
-	return entries
-}
-
-// latestSummaryContent returns the content of the most recent injected summary
-// message in messages (a user message beginning with summaryLabel), or "".
-func latestSummaryContent(messages []zeroruntime.Message) string {
-	for i := len(messages) - 1; i >= 0; i-- {
-		m := messages[i]
-		if m.Role == zeroruntime.MessageRoleUser && strings.HasPrefix(strings.TrimSpace(m.Content), summaryLabel) {
-			return m.Content
-		}
-	}
-	return ""
-}
-
-// mergeSkillEntries overlays newer skill loads onto older preserved entries by
-// name (newer body wins), keeping the older order and appending genuinely-new
-// skills after.
-func mergeSkillEntries(older, newer []skillEntry) []skillEntry {
-	if len(newer) == 0 {
-		return older
-	}
-	newBody := make(map[string]string, len(newer))
-	for _, e := range newer {
-		newBody[e.name] = e.body
-	}
-	merged := make([]skillEntry, 0, len(older)+len(newer))
-	seen := make(map[string]bool, len(older))
-	for _, e := range older {
-		if b, ok := newBody[e.name]; ok {
-			e.body = b
-		}
-		merged = append(merged, e)
-		seen[e.name] = true
-	}
-	for _, e := range newer {
-		if !seen[e.name] {
-			merged = append(merged, e)
-		}
-	}
-	return merged
-}

internal/agent/compaction_preserve_test.go

@@ -1,528 +0,0 @@
-package agent
-
-import (
-	"encoding/json"
-	"strings"
-	"testing"
-	"unicode/utf8"
-
-	"github.com/Gitlawb/zero/internal/tools"
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-// stateConversation is a long enough conversation that Compact elides a middle
-// containing an update_plan call and a loaded skill (call + result).
-func stateConversation() []zeroruntime.Message {
-	return []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "build the thing"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "planning", ToolCalls: []zeroruntime.ToolCall{
-			{ID: "p1", Name: "update_plan", Arguments: `{"plan":[{"content":"write code","status":"in_progress"},{"content":"add tests","status":"pending"}]}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, Content: "plan updated", ToolCallID: "p1"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "loading skill", ToolCalls: []zeroruntime.ToolCall{
-			{ID: "s1", Name: "skill", Arguments: `{"name":"deploy"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, Content: "Deploy skill: run `make deploy` then tag the release.", ToolCallID: "s1"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "done step 1"},
-		{Role: zeroruntime.MessageRoleUser, Content: "continue"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-	}
-}
-
-func compactStateConversation(t *testing.T, messages []zeroruntime.Message) string {
-	t.Helper()
-	compacted, err := Compact(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "SUMMARY", nil },
-	})
-	if err != nil {
-		t.Fatalf("Compact returned error: %v", err)
-	}
-	// [system, summaryUserMsg, ...suffix] — the summary is the message after system.
-	if len(compacted) < 2 || compacted[1].Role != zeroruntime.MessageRoleUser {
-		t.Fatalf("unexpected compacted shape: %#v", compacted)
-	}
-	if !strings.Contains(compacted[1].Content, summaryLabel) {
-		t.Fatalf("summary message missing label: %q", compacted[1].Content)
-	}
-	return compacted[1].Content
-}
-
-func TestCompactPreservesActivePlan(t *testing.T) {
-	summary := compactStateConversation(t, stateConversation())
-	if !strings.Contains(summary, preservedStateLabel) {
-		t.Fatalf("expected preserved-state block, got %q", summary)
-	}
-	for _, want := range []string{"- [in_progress] write code", "- [pending] add tests"} {
-		if !strings.Contains(summary, want) {
-			t.Fatalf("plan item %q not preserved in %q", want, summary)
-		}
-	}
-}
-
-func TestCompactPreservesBoundedTaskContext(t *testing.T) {
-	objective := strings.Repeat("世", maxTaskObjectiveBytes)
-	task := newTaskState(objective, nil)
-	task.observe(taskStateEvent{kind: taskStateEventPlan, arguments: `{"plan":[{"content":"write code","status":"in_progress"},{"content":"add tests","status":"pending"}]}`})
-	task.observe(taskStateEvent{kind: taskStateEventToolResult, arguments: `{"patch":"*** Update File: internal/db.go"}`, toolResult: ToolResult{
-		Name: "apply_patch", Status: tools.StatusOK, Output: "Done!", ChangedFiles: []string{"internal/db.go"},
-	}})
-	messages := stateConversation()
-	compacted, err := Compact(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "SUMMARY", nil },
-		taskState:    task.snapshotForCompaction(messages),
-	})
-	if err != nil {
-		t.Fatalf("Compact: %v", err)
-	}
-	state := parsePreservedStateBlock(compacted[1].Content)
-	if state.Task == nil || state.Task.Status != taskStatusActive || state.Task.InProgress != 1 || state.Task.Pending != 1 {
-		t.Fatalf("unexpected compact task state: %#v", state.Task)
-	}
-	if len(state.Task.Objective) > maxTaskObjectiveBytes || !utf8.ValidString(state.Task.Objective) {
-		t.Fatalf("objective was not safely bounded: %d bytes %q", len(state.Task.Objective), state.Task.Objective)
-	}
-	if len(state.Task.ChangedFiles) != 1 || state.Task.ChangedFiles[0] != "internal/db.go" {
-		t.Fatalf("changed files were not preserved: %#v", state.Task.ChangedFiles)
-	}
-}
-
-func TestCompactPreservesRuntimeEvidenceAcrossRepeatedCompaction(t *testing.T) {
-	task := newTaskState("Please keep the change focused.", nil)
-	task.observe(taskStateEvent{kind: taskStateEventToolResult, arguments: `{"cmd":"go test ./..."}`, toolResult: ToolResult{
-		Name: "exec_command", Status: tools.StatusError, Output: "Error: tests failed",
-		Meta: map[string]string{"spill_path": ".zero/artifacts/tests.txt"},
-	}})
-	task.observe(taskStateEvent{kind: taskStateEventPermission, permission: PermissionEvent{
-		ToolName: "exec_command", DecisionAction: PermissionDecisionAllowForSession, Scope: "/tmp",
-	}})
-	messages := stateConversation()
-
-	first, err := Compact(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "FIRST", nil },
-		taskState:    task.snapshotForCompaction(messages),
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	task.observe(taskStateEvent{kind: taskStateEventToolResult, arguments: `{"cmd":"go test ./..."}`, toolResult: ToolResult{
-		Name: "exec_command", Status: tools.StatusError, Output: "Error: tests still fail with newer evidence",
-		Meta: map[string]string{"spill_path": ".zero/artifacts/tests.txt"},
-	}})
-	secondInput := append(append([]zeroruntime.Message{}, first...),
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "Never add background memory models."},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "understood"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "continue"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "working"},
-	)
-	second, err := Compact(secondInput, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "SECOND", nil },
-		taskState:    task.snapshotForCompaction(secondInput),
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	state := parsePreservedStateBlock(second[1].Content)
-	if state.Task == nil || len(state.Task.UnresolvedFailures) != 1 || len(state.Task.Approvals) != 1 || len(state.Task.Artifacts) != 1 {
-		t.Fatalf("runtime evidence did not survive repeated compaction: %#v", state.Task)
-	}
-	if got := state.Task.UnresolvedFailures[0].Summary; got != "Error: tests still fail with newer evidence" {
-		t.Fatalf("newer failure evidence did not replace the older summary: %#v", state.Task.UnresolvedFailures)
-	}
-	for _, want := range []string{"Please keep the change focused.", "Never add background memory models."} {
-		if !containsString(state.Task.Constraints, want) {
-			t.Fatalf("constraint %q missing after repeated compaction: %#v", want, state.Task.Constraints)
-		}
-	}
-}
-
-func containsString(values []string, want string) bool {
-	for _, value := range values {
-		if value == want {
-			return true
-		}
-	}
-	return false
-}
-
-func TestCompactPreservesObjectiveAfterPlanParityMismatch(t *testing.T) {
-	prior := preservedState{Task: &preservedTaskState{Objective: "stale objective", Status: taskStatusActive, Pending: 1}}
-	encoded, err := json.Marshal(prior)
-	if err != nil {
-		t.Fatal(err)
-	}
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: summaryLabel + "\nold\n\n" + preservedStateLabel + "\n" + string(encoded)},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-		{Role: zeroruntime.MessageRoleUser, Content: "more"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "working"},
-		{Role: zeroruntime.MessageRoleUser, Content: "again"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "done"},
-	}
-	compacted, err := Compact(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "SUMMARY", nil },
-		taskState: &taskStateSnapshot{
-			Objective:  "current objective",
-			PlanParity: taskPlanParityMismatch,
-		},
-	})
-	if err != nil {
-		t.Fatalf("Compact: %v", err)
-	}
-	state := parsePreservedStateBlock(compacted[1].Content)
-	if state.Task == nil || state.Task.Objective != "current objective" {
-		t.Fatalf("immutable objective was lost on plan mismatch: %#v", state.Task)
-	}
-	if state.Task.Status != "" || state.Task.Pending != 0 {
-		t.Fatalf("uncorroborated mutable task fields survived plan mismatch: %#v", state.Task)
-	}
-}
-
-func TestTaskObjectiveSurvivesRepeatedCompactionWithoutPlanRefresh(t *testing.T) {
-	task := newTaskState("keep this objective", nil)
-	task.observe(taskStateEvent{kind: taskStateEventPlan, arguments: `{"plan":[{"content":"write code","status":"in_progress"},{"content":"add tests","status":"pending"}]}`})
-	messages := stateConversation()
-
-	first, err := Compact(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "FIRST", nil },
-		taskState:    task.snapshotForCompaction(messages),
-	})
-	if err != nil {
-		t.Fatalf("first Compact: %v", err)
-	}
-	secondInput := append(append([]zeroruntime.Message{}, first...),
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "more"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "working"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "again"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "done"},
-	)
-	snapshot := task.snapshotForCompaction(secondInput)
-	if snapshot.PlanParity != taskPlanParityMismatch {
-		t.Fatalf("plan call should be absent after first compaction, parity=%q", snapshot.PlanParity)
-	}
-	second, err := Compact(secondInput, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "SECOND", nil },
-		taskState:    snapshot,
-	})
-	if err != nil {
-		t.Fatalf("second Compact: %v", err)
-	}
-	state := parsePreservedStateBlock(second[1].Content)
-	if state.Task == nil || state.Task.Objective != "keep this objective" {
-		t.Fatalf("objective lost after second compaction: %#v", state.Task)
-	}
-	if state.Task.Status != "" || state.Task.InProgress != 0 {
-		t.Fatalf("uncorroborated mutable fields survived second compaction: %#v", state.Task)
-	}
-}
-
-func TestCompactPreservesLoadedSkills(t *testing.T) {
-	summary := compactStateConversation(t, stateConversation())
-	if !strings.Contains(summary, preservedStateLabel) {
-		t.Fatalf("expected preserved-state block, got %q", summary)
-	}
-	if !strings.Contains(summary, `"name":"deploy"`) || !strings.Contains(summary, "make deploy") {
-		t.Fatalf("skill name/body not preserved in %q", summary)
-	}
-}
-
-func TestCompactPreservesLoadedToolSearchSchemas(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "load weather tool"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "loading", ToolCalls: []zeroruntime.ToolCall{
-			{ID: "t1", Name: "tool_search", Arguments: `{"query":"select:weather_lookup"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "t1", Content: "Loaded 1 tool. Full schemas follow; call them on the next turn.\n\n## weather_lookup\nLook up weather.\ninput schema:\n{\n  \"type\": \"object\"\n}"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "ready"},
-		{Role: zeroruntime.MessageRoleUser, Content: "continue"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-	}
-	summary := compactStateConversation(t, messages)
-	if !strings.Contains(summary, `"name":"weather_lookup"`) || !strings.Contains(summary, "input schema") {
-		t.Fatalf("loaded tool schema not preserved in %q", summary)
-	}
-}
-
-func TestCompactPreservesProjectInstructions(t *testing.T) {
-	projectInstructions := "# AGENTS.md instructions for D:\\repo\n\n<INSTRUCTIONS>\nUse `go test ./internal/agent` for agent changes.\nDo not touch TUI code.\n</INSTRUCTIONS>\n\n<environment_context>\nignored runtime context\n</environment_context>"
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: projectInstructions},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "ack"},
-		{Role: zeroruntime.MessageRoleUser, Content: "work on compaction"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "working"},
-		{Role: zeroruntime.MessageRoleUser, Content: "continue"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-	}
-	summary := compactStateConversation(t, messages)
-	state := parsePreservedStateBlock(summary)
-	if len(state.ProjectInstructions) != 1 {
-		t.Fatalf("expected one preserved project instruction block, got %#v", state.ProjectInstructions)
-	}
-	body := state.ProjectInstructions[0].Body
-	if state.ProjectInstructions[0].Source != "AGENTS.md instructions for D:\\repo" ||
-		!strings.Contains(body, "# AGENTS.md instructions for D:\\repo") ||
-		!strings.Contains(body, "Do not touch TUI code.") ||
-		strings.Contains(body, "ignored runtime context") {
-		t.Fatalf("project instructions not preserved cleanly in %#v", state.ProjectInstructions[0])
-	}
-}
-
-func TestProjectInstructionBlockAcceptsProjectGuidelineFilename(t *testing.T) {
-	source, body := projectInstructionBlock("# ZERO.md instructions for /repo\n\n<INSTRUCTIONS>\nPrefer Go commands.\n</INSTRUCTIONS>")
-	if source != "ZERO.md instructions for /repo" || !strings.Contains(body, "Prefer Go commands.") {
-		t.Fatalf("expected ZERO.md instruction block to parse, got source=%q body=%q", source, body)
-	}
-}
-
-func TestCompactWithoutStateHasNoPreserveSections(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "hello"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "hi there"},
-		{Role: zeroruntime.MessageRoleUser, Content: "tell me more"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "sure"},
-		{Role: zeroruntime.MessageRoleUser, Content: "and more"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "ok"},
-	}
-	summary := compactStateConversation(t, messages)
-	if strings.Contains(summary, preservedStateLabel) {
-		t.Fatalf("did not expect a preserved-state block without plan/skill: %q", summary)
-	}
-}
-
-func TestCompactCarriesPreservedStateAcrossRepeatedCompaction(t *testing.T) {
-	// First compaction: real update_plan + skill load in the elided middle.
-	first, err := Compact(stateConversation(), CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "FIRST SUMMARY", nil },
-	})
-	if err != nil {
-		t.Fatalf("first Compact: %v", err)
-	}
-
-	// Grow the history so the first summary (which holds the preserved sections,
-	// but no real tool calls) falls into the SECOND compaction's middle.
-	second := append([]zeroruntime.Message{}, first...)
-	second = append(second,
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "what next"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "keep going"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "done"},
-	)
-
-	// The second summarizer deliberately DROPS the preserved sections.
-	out, err := Compact(second, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "SECOND SUMMARY with no preserved sections", nil },
-	})
-	if err != nil {
-		t.Fatalf("second Compact: %v", err)
-	}
-	if len(out) < 2 || out[1].Role != zeroruntime.MessageRoleUser {
-		t.Fatalf("unexpected compacted shape: %#v", out)
-	}
-	newSummary := out[1].Content
-	// Plan and skill must survive even though the summarizer didn't copy them.
-	if !strings.Contains(newSummary, preservedStateLabel) || !strings.Contains(newSummary, "write code") {
-		t.Fatalf("active plan lost on the second compaction: %q", newSummary)
-	}
-	if !strings.Contains(newSummary, `"name":"deploy"`) || !strings.Contains(newSummary, "make deploy") {
-		t.Fatalf("loaded skill lost on the second compaction: %q", newSummary)
-	}
-}
-
-func TestCompactCarriesLoadedToolsAndProjectInstructionsAcrossRepeatedCompaction(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "# AGENTS.md instructions for /repo\n\n<INSTRUCTIONS>\nStay in internal/agent.\n</INSTRUCTIONS>"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "loading", ToolCalls: []zeroruntime.ToolCall{
-			{ID: "t1", Name: "tool_search", Arguments: `{"query":"select:weather_lookup"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "t1", Content: "Loaded 1 tool. Full schemas follow; call them on the next turn.\n\n## weather_lookup\nLook up weather.\ninput schema:\n{\n  \"type\": \"object\"\n}"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "ready"},
-		{Role: zeroruntime.MessageRoleUser, Content: "continue"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-	}
-
-	first, err := Compact(messages, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "FIRST SUMMARY", nil },
-	})
-	if err != nil {
-		t.Fatalf("first Compact: %v", err)
-	}
-	second := append(append([]zeroruntime.Message{}, first...),
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "more"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "ok"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "again"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "fine"},
-	)
-
-	out, err := Compact(second, CompactionOptions{
-		PreserveLast: 2,
-		Summarize:    func([]zeroruntime.Message) (string, error) { return "SECOND SUMMARY", nil },
-	})
-	if err != nil {
-		t.Fatalf("second Compact: %v", err)
-	}
-	state := parsePreservedStateBlock(out[1].Content)
-	if len(state.Tools) != 1 || state.Tools[0].Name != "weather_lookup" || !strings.Contains(state.Tools[0].Body, "input schema") {
-		t.Fatalf("loaded tool state was not carried forward: %#v", state.Tools)
-	}
-	if len(state.ProjectInstructions) != 1 ||
-		state.ProjectInstructions[0].Source != "AGENTS.md instructions for /repo" ||
-		!strings.Contains(state.ProjectInstructions[0].Body, "Stay in internal/agent.") {
-		t.Fatalf("project instructions were not carried forward: %#v", state.ProjectInstructions)
-	}
-}
-
-// TestCompactPreservesSkillBodyWithMarkdownHeadings is CodeRabbit's regression:
-// a verbatim skill body containing ## / ### headings (and a code fence) must
-// round-trip across TWO compactions without truncation or bogus extra skills —
-// which the old markdown-delimited format could not guarantee.
-func TestCompactPreservesSkillBodyWithMarkdownHeadings(t *testing.T) {
-	body := "## Usage\nrun it\n### Examples\n```\nzero do\n```\n## Notes\ndone"
-	conv := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "load a skill"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "loading", ToolCalls: []zeroruntime.ToolCall{
-			{ID: "s1", Name: "skill", Arguments: `{"name":"guide"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, Content: body, ToolCallID: "s1"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "done step 1"},
-		{Role: zeroruntime.MessageRoleUser, Content: "continue"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-	}
-
-	mustContainBody := func(label string, messages []zeroruntime.Message) []zeroruntime.Message {
-		out, err := Compact(messages, CompactionOptions{
-			PreserveLast: 2,
-			Summarize:    func([]zeroruntime.Message) (string, error) { return "SUMMARY", nil },
-		})
-		if err != nil {
-			t.Fatalf("%s Compact: %v", label, err)
-		}
-		if len(out) < 2 || out[1].Role != zeroruntime.MessageRoleUser {
-			t.Fatalf("%s: unexpected compacted shape: %#v", label, out)
-		}
-		_, skills := parsePreservedState(out[1].Content)
-		if len(skills) != 1 || skills[0].name != "guide" || skills[0].body != body {
-			t.Fatalf("%s: skill body not round-tripped intact: %#v", label, skills)
-		}
-		return out
-	}
-
-	first := mustContainBody("first", conv)
-	// Second compaction with NO fresh tool calls and a summarizer that drops it.
-	second := append(append([]zeroruntime.Message{}, first...),
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "more"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "ok"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "again"},
-		zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: "fine"},
-	)
-	mustContainBody("second", second)
-}
-
-func TestExtractLatestPlanReturnsMostRecent(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "a", Name: "update_plan", Arguments: `{"plan":[{"content":"old step","status":"completed"}]}`},
-		}},
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "b", Name: "update_plan", Arguments: `{"plan":[{"content":"new step","status":"in_progress"}]}`},
-		}},
-	}
-	got := extractLatestPlan(messages)
-	if !strings.Contains(got, "new step") || strings.Contains(got, "old step") {
-		t.Fatalf("extractLatestPlan should return the most recent plan, got %q", got)
-	}
-}
-
-func TestFormatPlanArgumentsRejectsUnsupportedStepAlias(t *testing.T) {
-	got := formatPlanArguments(`{"plan":[{"step":"write failing test","status":"in_progress"},{"content":"keep existing shape","status":"pending"}]}`)
-	if got != "" {
-		t.Fatalf("unsupported alias should reject the whole plan like update_plan, got %q", got)
-	}
-}
-
-func TestFormatPlanArgumentsPreservesNotes(t *testing.T) {
-	got := formatPlanArguments(`{"plan":[{"content":"finish preservation","status":"in_progress","notes":"keep TUI untouched"}]}`)
-	if !strings.Contains(got, "- [in_progress] finish preservation") || !strings.Contains(got, "Notes: keep TUI untouched") {
-		t.Fatalf("expected plan content and notes to be preserved, got %q", got)
-	}
-}
-
-func TestCapBodyShortBodyUnchanged(t *testing.T) {
-	body := "short skill body"
-	if got := capBody(body); got != body {
-		t.Fatalf("capBody changed a short body: %q", got)
-	}
-	if strings.Contains(capBody(body), "truncated") {
-		t.Fatalf("note added without truncation")
-	}
-}
-
-func TestCapBodyRespectsByteBudgetForMultibyte(t *testing.T) {
-	// Each '世' is 3 bytes; build a body well over the byte budget.
-	body := strings.Repeat("世", maxPreservedSkillBytes)
-	got := capBody(body)
-	if len(got) > maxPreservedSkillBytes {
-		t.Fatalf("capBody returned %d bytes, want <= %d (byte budget)", len(got), maxPreservedSkillBytes)
-	}
-	if !strings.Contains(got, "truncated") {
-		t.Fatalf("expected truncation note on an over-budget body")
-	}
-	if !utf8.ValidString(got) {
-		t.Fatalf("capBody split a multibyte rune (invalid UTF-8)")
-	}
-}
-
-func TestCapBodyNoteOnlyWhenTruncated(t *testing.T) {
-	// A body whose RUNE count is under the cap but BYTE length is over it must
-	// still be byte-capped (the old rune-based check mishandled this case).
-	body := strings.Repeat("世", (maxPreservedSkillBytes/3)+100)
-	if len(body) <= maxPreservedSkillBytes {
-		t.Fatalf("test setup: body should exceed the byte budget, got %d", len(body))
-	}
-	got := capBody(body)
-	if len(got) > maxPreservedSkillBytes {
-		t.Fatalf("capBody returned %d bytes, want <= %d", len(got), maxPreservedSkillBytes)
-	}
-	if !strings.Contains(got, "truncated") || !utf8.ValidString(got) {
-		t.Fatalf("expected a valid, truncated body, got %q", got)
-	}
-}
-
-func TestLoadedSkillsSkipsCallsWithoutResult(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "s1", Name: "skill", Arguments: `{"name":"ghost"}`}, // no matching tool result
-		}},
-	}
-	if got := loadedSkills(messages); len(got) != 0 {
-		t.Fatalf("expected no skills without a result body, got %#v", got)
-	}
-}
-
-func TestLoadedSkillsAcceptsSkillArgumentAlias(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "s1", Name: "skill", Arguments: `{"skill":"deploy"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "s1", Content: "deploy instructions"},
-	}
-	got := loadedSkills(messages)
-	if len(got) != 1 || got[0].name != "deploy" || got[0].body != "deploy instructions" {
-		t.Fatalf("loadedSkills should honor skill alias, got %#v", got)
-	}
-}

internal/agent/compaction_projection.go

@@ -1,318 +0,0 @@
-package agent
-
-import (
-	"encoding/json"
-	"fmt"
-	"regexp"
-	"strings"
-
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-const (
-	compactionUserWordBudget       = 256
-	compactionAssistantWordBudget  = 200
-	compactionToolCallsPerTurn     = 8
-	compactionToolArgumentBytes    = 120
-	compactionErrorBytes           = 150
-	compactionResultBytes          = 1200
-	compactionPreviousSummaryBytes = 16 * 1024
-	compactionBriefMaxBytes        = 24 * 1024
-)
-
-var compactionWordPattern = regexp.MustCompile(`[\p{L}\p{N}]+`)
-
-type compactionProjection struct {
-	messages  []zeroruntime.Message
-	truncated bool
-}
-
-// projectCompactionInput removes reconstructible tool output before the model
-// summary call. It retains a bounded transcript of user intent, assistant
-// decisions, tool actions, and concise errors. Exact durable state is appended
-// separately from the original messages after the summary returns.
-func projectCompactionInput(messages []zeroruntime.Message) compactionProjection {
-	sections := make([]string, 0, len(messages))
-	previousSummary := ""
-	truncated := false
-	for index, message := range messages {
-		switch message.Role {
-		case zeroruntime.MessageRoleUser:
-			content := message.Content
-			if marker := strings.Index(content, preservedStateLabel); marker >= 0 {
-				content = content[:marker]
-			}
-			trimmed := strings.TrimSpace(content)
-			if strings.HasPrefix(trimmed, summaryLabel) {
-				fullSummary := strings.TrimSpace(strings.TrimPrefix(trimmed, summaryLabel))
-				previousSummary = clipHeadTailBytes(fullSummary, compactionPreviousSummaryBytes)
-				truncated = truncated || len(fullSummary) > compactionPreviousSummaryBytes
-				continue
-			}
-			if content = clipInformativeWords(content, compactionUserWordBudget); content != "" {
-				sections = append(sections, fmt.Sprintf("[user #%d]\n%s", index, content))
-			}
-		case zeroruntime.MessageRoleAssistant:
-			lines := make([]string, 0, 1+len(message.ToolCalls))
-			if content := clipInformativeWords(message.Content, compactionAssistantWordBudget); content != "" {
-				lines = append(lines, content)
-			}
-			calls := message.ToolCalls
-			omitted := 0
-			if len(calls) > compactionToolCallsPerTurn {
-				omitted = len(calls) - compactionToolCallsPerTurn
-				calls = calls[omitted:]
-			}
-			if omitted > 0 {
-				lines = append(lines, fmt.Sprintf("* (%d earlier tool calls omitted)", omitted))
-			}
-			for _, call := range calls {
-				lines = append(lines, compactionToolCallLine(call))
-			}
-			if len(lines) > 0 {
-				sections = append(sections, fmt.Sprintf("[assistant #%d]\n%s", index, strings.Join(lines, "\n")))
-			}
-		case zeroruntime.MessageRoleTool:
-			// New tool-result messages carry the execution status directly, as the
-			// source ToolResult does. Keep the text check for older session history
-			// created before Message exposed IsError.
-			name := toolNameForResult(messages, index)
-			mustPreserve := name == "ask_user" || len(message.ChangedFiles) > 0
-			if !mustPreserve && !message.IsError && !isLikelyToolError(message.Content) {
-				continue
-			}
-			if name == "" {
-				name = "tool"
-			}
-			switch {
-			case message.IsError || isLikelyToolError(message.Content):
-				sections = append(sections, fmt.Sprintf("[tool_error #%d] %s\n%s", index, name, clipBytes(firstLine(message.Content), compactionErrorBytes)))
-			case name == "ask_user":
-				sections = append(sections, fmt.Sprintf("[user_answer #%d] %s\n%s", index, name, clipBytes(message.Content, compactionResultBytes)))
-			default:
-				sections = append(sections, fmt.Sprintf("[tool_result #%d] %s changed %s\n%s", index, name,
-					clipBytes(strings.Join(message.ChangedFiles, ", "), compactionToolArgumentBytes), clipBytes(firstLine(message.Content), compactionErrorBytes)))
-			}
-		}
-	}
-	if len(sections) == 0 && previousSummary == "" {
-		return compactionProjection{}
-	}
-	brief, briefTruncated := capCompactionBrief(strings.Join(sections, "\n\n"))
-	truncated = truncated || briefTruncated
-	if previousSummary != "" {
-		brief = "[previous summary]\n" + previousSummary + "\n\n" + brief
-	}
-	return compactionProjection{
-		messages:  []zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: strings.TrimSpace(brief)}},
-		truncated: truncated,
-	}
-}
-
-func capCompactionBrief(brief string) (string, bool) {
-	if len(brief) <= compactionBriefMaxBytes {
-		return brief, false
-	}
-	marker := "\n\n...[middle transcript omitted to fit compaction budget]...\n\n"
-	available := compactionBriefMaxBytes - len(marker)
-	// Keep both chronological edges: the oldest material has not necessarily
-	// been summarized before, while the newest material is most actionable.
-	headBytes := available * 2 / 5
-	tailBytes := available - headBytes
-	head := clipPrefixAtBoundary(brief, headBytes)
-	tail := clipSuffixAtBoundary(brief, tailBytes)
-	return strings.TrimSpace(head) + marker + strings.TrimSpace(tail), true
-}
-
-func compactionToolCallLine(call zeroruntime.ToolCall) string {
-	detail := ""
-	if call.Freeform && call.Name == "apply_patch" {
-		detail = strings.Join(patchPaths(call.Arguments), ", ")
-	}
-	var arguments map[string]any
-	if detail == "" && json.Unmarshal([]byte(strings.TrimSpace(call.Arguments)), &arguments) == nil {
-		for _, key := range []string{"file_path", "path", "url", "query", "pattern", "prompt", "description", "question"} {
-			if value, ok := arguments[key].(string); ok && strings.TrimSpace(value) != "" {
-				detail = value
-				break
-			}
-		}
-		if detail == "" && call.Name == "ask_user" {
-			detail = askUserQuestionsDetail(arguments)
-		}
-		if detail == "" && call.Name == "apply_patch" {
-			if patch, ok := arguments["patch"].(string); ok {
-				detail = strings.Join(patchPaths(patch), ", ")
-			}
-		}
-	}
-	if detail == "" {
-		detail = commandFromArguments(call.Arguments)
-	}
-	if detail == "" {
-		return "* " + call.Name
-	}
-	return fmt.Sprintf("* %s %q", call.Name, clipBytes(detail, compactionToolArgumentBytes))
-}
-
-func isLikelyToolError(content string) bool {
-	prefix := strings.TrimSpace(content)
-	if len(prefix) > compactionErrorBytes {
-		prefix = prefix[:compactionErrorBytes]
-	}
-	lower := strings.ToLower(prefix)
-	for _, prefix := range []string{"error:", "tool error:", "failed:", "permission denied", "command failed"} {
-		if strings.HasPrefix(lower, prefix) {
-			return true
-		}
-	}
-	return false
-}
-
-func clipInformativeWords(text string, limit int) string {
-	flat := strings.Join(strings.Fields(text), " ")
-	if flat == "" || limit <= 0 {
-		return ""
-	}
-	count := 0
-	for _, location := range compactionWordPattern.FindAllStringIndex(flat, -1) {
-		word := strings.ToLower(flat[location[0]:location[1]])
-		if compactionStopWords[word] {
-			continue
-		}
-		count++
-		if count > limit {
-			end := location[0]
-			return strings.TrimSpace(flat[:end]) + "...(truncated)"
-		}
-	}
-	return flat
-}
-
-func clipBytes(text string, limit int) string {
-	text = strings.TrimSpace(text)
-	if limit <= 0 {
-		return ""
-	}
-	if len(text) <= limit {
-		return text
-	}
-	if limit <= 3 {
-		end := limit
-		for end > 0 && end < len(text) && text[end]&0xc0 == 0x80 {
-			end--
-		}
-		return text[:end]
-	}
-	end := limit - 3
-	for end > 0 && end < len(text) && text[end]&0xc0 == 0x80 {
-		end--
-	}
-	return strings.TrimSpace(text[:end]) + "..."
-}
-
-func clipHeadTailBytes(text string, limit int) string {
-	text = strings.TrimSpace(text)
-	if len(text) <= limit {
-		return text
-	}
-	if limit <= 0 {
-		return ""
-	}
-	marker := "\n...[middle omitted]...\n"
-	if limit <= len(marker) {
-		return clipBytes(text, limit)
-	}
-	available := limit - len(marker)
-	head := clipPrefixAtBoundary(text, available/2)
-	tail := clipSuffixAtBoundary(text, available-available/2)
-	return strings.TrimSpace(head) + marker + strings.TrimSpace(tail)
-}
-
-func clipPrefixAtBoundary(text string, limit int) string {
-	if limit <= 0 {
-		return ""
-	}
-	if len(text) <= limit {
-		return text
-	}
-	end := limit
-	for end > 0 && text[end]&0xc0 == 0x80 {
-		end--
-	}
-	if boundary := strings.LastIndex(text[:end], "\n\n["); boundary > 0 {
-		end = boundary
-	}
-	return text[:end]
-}
-
-func clipSuffixAtBoundary(text string, limit int) string {
-	if limit <= 0 {
-		return ""
-	}
-	if len(text) <= limit {
-		return text
-	}
-	start := len(text) - limit
-	for start < len(text) && text[start]&0xc0 == 0x80 {
-		start++
-	}
-	if boundary := strings.Index(text[start:], "\n\n["); boundary >= 0 {
-		start += boundary + 2
-	}
-	return text[start:]
-}
-
-func askUserQuestionsDetail(arguments map[string]any) string {
-	raw, ok := arguments["questions"].([]any)
-	if !ok {
-		return ""
-	}
-	questions := make([]string, 0, len(raw))
-	for _, item := range raw {
-		object, ok := item.(map[string]any)
-		if !ok {
-			continue
-		}
-		if question, ok := object["question"].(string); ok && strings.TrimSpace(question) != "" {
-			questions = append(questions, strings.TrimSpace(question))
-		}
-	}
-	return strings.Join(questions, " | ")
-}
-
-func patchPaths(patch string) []string {
-	var paths []string
-	seen := map[string]bool{}
-	for _, line := range strings.Split(patch, "\n") {
-		for _, prefix := range []string{"*** Add File: ", "*** Update File: ", "*** Delete File: ", "*** Move to: "} {
-			if !strings.HasPrefix(line, prefix) {
-				continue
-			}
-			path := strings.TrimSpace(strings.TrimPrefix(line, prefix))
-			if path != "" && !seen[path] {
-				seen[path] = true
-				paths = append(paths, path)
-			}
-		}
-	}
-	return paths
-}
-
-var compactionStopWords = map[string]bool{
-	"a": true, "an": true, "the": true, "is": true, "are": true, "was": true, "were": true,
-	"be": true, "been": true, "being": true, "have": true, "has": true, "had": true,
-	"do": true, "does": true, "did": true, "will": true, "would": true, "could": true,
-	"should": true, "may": true, "might": true, "shall": true, "can": true, "need": true, "must": true,
-	"to": true, "of": true, "in": true, "for": true, "on": true, "with": true, "at": true,
-	"by": true, "from": true, "as": true, "into": true, "through": true, "during": true,
-	"before": true, "after": true, "above": true, "below": true, "between": true, "under": true, "over": true,
-	"and": true, "but": true, "or": true, "nor": true, "not": true, "so": true, "yet": true,
-	"both": true, "either": true, "neither": true, "each": true, "every": true, "all": true,
-	"any": true, "few": true, "more": true, "most": true, "other": true, "some": true, "such": true, "no": true,
-	"that": true, "this": true, "these": true, "those": true, "it": true, "its": true,
-	"i": true, "me": true, "my": true, "we": true, "our": true, "you": true, "your": true,
-	"he": true, "him": true, "his": true, "she": true, "her": true, "they": true, "them": true, "their": true,
-	"who": true, "which": true, "what": true, "if": true, "then": true, "than": true,
-	"when": true, "where": true, "how": true, "just": true, "also": true,
-}

internal/agent/compaction_projection_test.go

@@ -1,131 +0,0 @@
-package agent
-
-import (
-	"strings"
-	"testing"
-	"unicode/utf8"
-
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-func TestClipBytesHandlesTinyLimitsOnRuneBoundaries(t *testing.T) {
-	for _, limit := range []int{0, 1, 2, 3} {
-		if clipped := clipBytes("世界", limit); len(clipped) > limit || !utf8.ValidString(clipped) {
-			t.Fatalf("clipBytes limit %d returned invalid result %q", limit, clipped)
-		}
-	}
-}
-
-func TestBoundaryClippersHandleNonPositiveLimits(t *testing.T) {
-	for _, clip := range []func(string, int) string{clipPrefixAtBoundary, clipSuffixAtBoundary} {
-		for _, limit := range []int{-1, 0} {
-			if got := clip("世界", limit); got != "" {
-				t.Fatalf("clipper limit %d = %q, want empty", limit, got)
-			}
-		}
-	}
-}
-
-func TestProjectCompactionInputDropsRecoverableToolBodies(t *testing.T) {
-	largeBody := strings.Repeat("recoverable source line\n", 1000)
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleUser, Content: "Inspect the parser and preserve its current behavior."},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "I will inspect before editing.", ToolCalls: []zeroruntime.ToolCall{{ID: "read", Name: "read_file", Arguments: `{"path":"internal/parser.go"}`}}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "read", Content: largeBody},
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{{ID: "test", Name: "exec_command", Arguments: `{"cmd":"go test ./internal/parser"}`}}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "test", Content: "Error: parser regression\nlong diagnostic details"},
-	}
-
-	projection := projectCompactionInput(messages)
-	projected := projection.messages
-	if len(projected) != 1 {
-		t.Fatalf("projection = %#v, want one compact message", projected)
-	}
-	content := projected[0].Content
-	for _, want := range []string{"Inspect the parser", `read_file "internal/parser.go"`, `exec_command "go test ./internal/parser"`, "Error: parser regression"} {
-		if !strings.Contains(content, want) {
-			t.Fatalf("projection missing %q: %q", want, content)
-		}
-	}
-	if strings.Contains(content, "recoverable source line") || strings.Contains(content, "long diagnostic details") {
-		t.Fatalf("projection retained reconstructible or overlong tool output: %q", content)
-	}
-	if estimateTokens(projected)*20 >= estimateTokens(messages) {
-		t.Fatalf("projection did not materially reduce tokens: before=%d after=%d", estimateTokens(messages), estimateTokens(projected))
-	}
-}
-
-func TestProjectCompactionInputRetainsStructurallyMarkedToolErrors(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{{ID: "git", Name: "exec_command", Arguments: `{"cmd":"git status"}`}}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "git", Content: "fatal: not a git repository", IsError: true},
-	}
-
-	projected := projectCompactionInput(messages).messages
-	if len(projected) != 1 || !strings.Contains(projected[0].Content, "fatal: not a git repository") {
-		t.Fatalf("structured tool error was dropped from projection: %#v", projected)
-	}
-}
-
-func TestProjectCompactionInputRetainsAskUserExchangeAndSemanticArguments(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{{ID: "ask", Name: "ask_user", Arguments: `{"questions":[{"question":"Which database should remain?"}]}`}}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "ask", Content: "Which database should remain?: Postgres only; do not touch MySQL."},
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "patch", Name: "apply_patch", Arguments: `{"patch":"*** Begin Patch\n*** Update File: internal/db.go\n*** End Patch"}`},
-			{ID: "raw-patch", Name: "apply_patch", Freeform: true, Arguments: "*** Begin Patch\n*** Update File: internal/api.go\n*** Add File: internal/config.go\n*** End Patch\n"},
-			{ID: "fetch", Name: "web_fetch", Arguments: `{"url":"https://example.com/spec"}`},
-			{ID: "task", Name: "task", Arguments: `{"prompt":"Inspect the Windows implementation"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "patch", Content: "Done!", ChangedFiles: []string{"internal/db.go"}},
-	}
-
-	content := projectCompactionInput(messages).messages[0].Content
-	for _, want := range []string{"Which database should remain?", "Postgres only; do not touch MySQL", "internal/db.go", "internal/api.go", "internal/config.go", "https://example.com/spec", "Inspect the Windows implementation"} {
-		if !strings.Contains(content, want) {
-			t.Fatalf("projection missing %q: %q", want, content)
-		}
-	}
-}
-
-func TestProjectCompactionInputCapsToolCallsPerTurn(t *testing.T) {
-	calls := make([]zeroruntime.ToolCall, 12)
-	for index := range calls {
-		calls[index] = zeroruntime.ToolCall{Name: "read_file", Arguments: `{"path":"file.go"}`}
-	}
-	projected := projectCompactionInput([]zeroruntime.Message{{Role: zeroruntime.MessageRoleAssistant, ToolCalls: calls}}).messages
-	content := projected[0].Content
-	if strings.Count(content, "* read_file") != compactionToolCallsPerTurn || !strings.Contains(content, "4 earlier tool calls omitted") {
-		t.Fatalf("tool-call tail was not bounded: %q", content)
-	}
-}
-
-func TestProjectCompactionInputCarriesPreviousSummaryOutsideBriefCap(t *testing.T) {
-	previous := "keep the earlier architecture decision\n" + strings.Repeat("prior detail ", 2000) + "\nkeep the newest prior decision"
-	messages := []zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: summaryLabel + "\n" + previous + "\n\n" + preservedStateLabel + "\n{}"}}
-	for index := range 500 {
-		messages = append(messages, zeroruntime.Message{Role: zeroruntime.MessageRoleAssistant, Content: strings.Repeat("later transcript detail ", 20)})
-		messages = append(messages, zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: "later request " + strings.Repeat("context ", 20) + string(rune('a'+index%26))})
-	}
-
-	projection := projectCompactionInput(messages)
-	content := projection.messages[0].Content
-	if !strings.Contains(content, "[previous summary]\nkeep the earlier architecture decision") || !strings.Contains(content, "keep the newest prior decision") {
-		t.Fatalf("previous summary was lost when the brief tail was capped: %q", content)
-	}
-	if !strings.Contains(content, "middle transcript omitted to fit compaction budget") {
-		t.Fatalf("oversized brief was not head/tail capped: %q", content)
-	}
-	if !projection.truncated {
-		t.Fatal("projection did not structurally report truncation")
-	}
-}
-
-func TestProjectCompactionInputDoesNotInferTruncationFromUserText(t *testing.T) {
-	projection := projectCompactionInput([]zeroruntime.Message{{
-		Role: zeroruntime.MessageRoleUser, Content: "Keep this literal marker: [middle omitted]",
-	}})
-	if projection.truncated {
-		t.Fatal("literal user text produced a false truncation signal")
-	}
-}

internal/agent/compaction_recent_edits_test.go

@@ -1,128 +0,0 @@
-package agent
-
-import (
-	"fmt"
-	"strings"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-// recentEdits extracts each mutated file's path and a one-line note from the
-// matching tool result, latest note per path in last-seen order.
-func TestRecentEditsExtractsPathsAndNotes(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "e1", Name: "write_file", Arguments: `{"path":"internal/foo.go","content":"package foo"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "e1", Content: "Wrote internal/foo.go (12 lines)"},
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "e2", Name: "edit_file", Arguments: `{"path":"internal/bar.go","old_string":"a","new_string":"b"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "e2", Content: "Applied edit to internal/bar.go"},
-		{Role: zeroruntime.MessageRoleAssistant, ToolCalls: []zeroruntime.ToolCall{
-			{ID: "e3", Name: "apply_patch", Arguments: `{"patch":"*** Update File: internal/baz.go"}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "e3", Content: "Done!", ChangedFiles: []string{"internal/baz.go"}},
-	}
-
-	edits := recentEdits(messages)
-	if len(edits) != 3 {
-		t.Fatalf("expected 3 edited files, got %d: %#v", len(edits), edits)
-	}
-	if edits[0].name != "internal/foo.go" || !strings.Contains(edits[0].body, "12 lines") {
-		t.Fatalf("first edit = %#v, want foo.go with its note", edits[0])
-	}
-	if edits[1].name != "internal/bar.go" || !strings.Contains(edits[1].body, "Applied edit") {
-		t.Fatalf("second edit = %#v, want bar.go with its note", edits[1])
-	}
-	if edits[2].name != "internal/baz.go" || edits[2].body != "Done!" {
-		t.Fatalf("third edit = %#v, want apply_patch changed file with its note", edits[2])
-	}
-}
-
-// After compaction elides the editing turns, the preserved-state block still
-// names the edited files and what changed, so the model needn't re-read them.
-func TestCompactionPreservesRecentEdits(t *testing.T) {
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		{Role: zeroruntime.MessageRoleUser, Content: "add a flag"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "editing", ToolCalls: []zeroruntime.ToolCall{
-			{ID: "e1", Name: "write_file", Arguments: `{"path":"cmd/main.go","content":"..."}`},
-		}},
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "e1", Content: "Wrote cmd/main.go (adds --version flag)"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "done"},
-		{Role: zeroruntime.MessageRoleUser, Content: "continue"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "continuing"},
-	}
-	summary := compactStateConversation(t, messages)
-
-	state := parsePreservedStateBlock(summary)
-	if len(state.RecentEdits) != 1 {
-		t.Fatalf("expected 1 preserved edit, got %#v", state.RecentEdits)
-	}
-	if state.RecentEdits[0].Path != "cmd/main.go" || !strings.Contains(state.RecentEdits[0].Note, "--version") {
-		t.Fatalf("preserved edit = %#v, want cmd/main.go + its note", state.RecentEdits[0])
-	}
-}
-
-// A fresh edit note for a path overrides the one carried from an earlier
-// compaction (newer wins) and moves the path to the newest position rather than
-// duplicating it or leaving it pinned to its old slot.
-func TestRecentEditsMergeNewerWins(t *testing.T) {
-	prior := preservedState{RecentEdits: []preservedEdit{{Path: "a.go", Note: "old note"}, {Path: "z.go", Note: "z"}}}
-	older := preservedEditsToEntries(prior.RecentEdits)
-	newer := []skillEntry{{name: "a.go", body: "new note"}, {name: "b.go", body: "added"}}
-
-	merged := mergeRecentEdits(older, newer)
-	// z.go (untouched) keeps its lead; a.go is re-edited so it takes the new note
-	// and moves behind z.go, ahead of the brand-new b.go: [z.go, a.go, b.go].
-	if len(merged) != 3 {
-		t.Fatalf("expected z.go + refreshed a.go + b.go, got %#v", merged)
-	}
-	if merged[0].name != "z.go" {
-		t.Fatalf("untouched z.go should stay first, got %#v", merged)
-	}
-	if merged[1].name != "a.go" || merged[1].body != "new note" {
-		t.Fatalf("re-edited a.go should move to the newest edits with the new note, got %#v", merged[1])
-	}
-	if merged[2].name != "b.go" {
-		t.Fatalf("brand-new b.go should be last, got %#v", merged[2])
-	}
-}
-
-// Regression: once more than maxRecentEdits distinct files are tracked, re-editing
-// an early file must move it into the capped tail rather than leaving it to be
-// dropped — otherwise the next compaction omits exactly the file the model most
-// recently touched.
-func TestRecentEditsCapKeepsReeditedFile(t *testing.T) {
-	// Earlier compaction preserved exactly maxRecentEdits files, f0 the oldest.
-	older := make([]skillEntry, 0, maxRecentEdits)
-	for i := 0; i < maxRecentEdits; i++ {
-		older = append(older, skillEntry{name: fmt.Sprintf("f%d.go", i), body: "old"})
-	}
-	// Fresh window re-edits the OLDEST file (f0) and adds a brand-new file, so the
-	// merged list exceeds the cap and something must be dropped.
-	newer := []skillEntry{{name: "f0.go", body: "re-edited"}, {name: "fresh.go", body: "new"}}
-
-	merged := capRecentEdits(mergeRecentEdits(older, newer))
-	if len(merged) != maxRecentEdits {
-		t.Fatalf("cap should keep %d entries, got %d", maxRecentEdits, len(merged))
-	}
-
-	var f0 *skillEntry
-	for i := range merged {
-		if merged[i].name == "f0.go" {
-			f0 = &merged[i]
-		}
-		if merged[i].name == "f1.go" {
-			t.Fatalf("f1.go (now the least-recently touched) should have been dropped, got %#v", merged)
-		}
-	}
-	if f0 == nil {
-		t.Fatalf("re-edited f0.go must survive the cap, got %#v", merged)
-	}
-	if f0.body != "re-edited" {
-		t.Fatalf("surviving f0.go should carry the fresh note, got %q", f0.body)
-	}
-}

internal/agent/compaction_summarizer_test.go

@@ -1,179 +0,0 @@
-package agent
-
-import (
-	"context"
-	"fmt"
-	"regexp"
-	"strings"
-	"sync/atomic"
-	"testing"
-
-	"github.com/Gitlawb/zero/internal/zeroruntime"
-)
-
-var markerPattern = regexp.MustCompile(`msg-\d+`)
-
-// sizeLimitedSummarizer returns a context-limit error when the rendered
-// transcript carries more than maxMarkers messages, and otherwise "summarizes"
-// by echoing the message markers it saw — so a successful summary records exactly
-// which messages it covered.
-type sizeLimitedSummarizer struct {
-	maxMarkers int
-	calls      int32
-}
-
-func (p *sizeLimitedSummarizer) StreamCompletion(_ context.Context, request zeroruntime.CompletionRequest) (<-chan zeroruntime.StreamEvent, error) {
-	atomic.AddInt32(&p.calls, 1)
-	text := request.Messages[len(request.Messages)-1].Content
-	markers := markerPattern.FindAllString(text, -1)
-	ch := make(chan zeroruntime.StreamEvent, 2)
-	if len(markers) > p.maxMarkers {
-		ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventError, Error: "context length exceeded"}
-		close(ch)
-		return ch, nil
-	}
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventText, Content: strings.Join(markers, " ")}
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventDone}
-	close(ch)
-	return ch, nil
-}
-
-type errorSummarizer struct {
-	message string
-	calls   int32
-}
-
-func (p *errorSummarizer) StreamCompletion(_ context.Context, _ zeroruntime.CompletionRequest) (<-chan zeroruntime.StreamEvent, error) {
-	atomic.AddInt32(&p.calls, 1)
-	ch := make(chan zeroruntime.StreamEvent, 1)
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventError, Error: p.message}
-	close(ch)
-	return ch, nil
-}
-
-// compressingSummarizer fails on more than maxMarkers messages but returns a
-// SHORT marker-free summary, so two partial summaries combine into something that
-// fits — modelling real summarization that shrinks its input.
-type compressingSummarizer struct {
-	maxMarkers int
-	calls      int32
-}
-
-func (p *compressingSummarizer) StreamCompletion(_ context.Context, request zeroruntime.CompletionRequest) (<-chan zeroruntime.StreamEvent, error) {
-	atomic.AddInt32(&p.calls, 1)
-	text := request.Messages[len(request.Messages)-1].Content
-	ch := make(chan zeroruntime.StreamEvent, 2)
-	if len(markerPattern.FindAllString(text, -1)) > p.maxMarkers {
-		ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventError, Error: "context length exceeded"}
-		close(ch)
-		return ch, nil
-	}
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventText, Content: "S"}
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventDone}
-	close(ch)
-	return ch, nil
-}
-
-func TestSummarizeWithFallbackReSummarizesPartialsIntoOne(t *testing.T) {
-	messages := make([]zeroruntime.Message, 4)
-	for i := range messages {
-		messages[i] = zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: fmt.Sprintf("msg-%d body", i)}
-	}
-	provider := &compressingSummarizer{maxMarkers: 2}
-
-	summary, err := summarizeWithFallback(context.Background(), provider, messages, nil)
-	if err != nil {
-		t.Fatalf("summarizeWithFallback failed: %v", err)
-	}
-	// The two chunk summaries ("S" / "S") are re-summarized into ONE unit, not
-	// returned as the joined "S\n\nS" blob — so a later compaction can shrink it.
-	if strings.Contains(summary, "\n\n") {
-		t.Fatalf("expected a single re-summarized result, got a joined blob: %q", summary)
-	}
-	if summary != "S" {
-		t.Fatalf("summary = %q, want the reduced %q", summary, "S")
-	}
-}
-
-func TestSummarizeWithFallbackChunksOnContextLimit(t *testing.T) {
-	const n = 8
-	messages := make([]zeroruntime.Message, n)
-	for i := range messages {
-		messages[i] = zeroruntime.Message{Role: zeroruntime.MessageRoleUser, Content: fmt.Sprintf("msg-%d some content", i)}
-	}
-	// The summarizer can only handle 2 messages per call, so the 8-message slice
-	// must be split recursively until each chunk fits.
-	provider := &sizeLimitedSummarizer{maxMarkers: 2}
-
-	summary, err := summarizeWithFallback(context.Background(), provider, messages, nil)
-	if err != nil {
-		t.Fatalf("summarizeWithFallback failed: %v", err)
-	}
-	for i := 0; i < n; i++ {
-		if !strings.Contains(summary, fmt.Sprintf("msg-%d", i)) {
-			t.Fatalf("combined summary missing msg-%d: %q", i, summary)
-		}
-	}
-	if got := atomic.LoadInt32(&provider.calls); got < 2 {
-		t.Fatalf("expected multiple calls from splitting, got %d", got)
-	}
-}
-
-func TestSummarizeWithFallbackPropagatesNonContextErrors(t *testing.T) {
-	provider := &errorSummarizer{message: "auth error: invalid key"}
-	_, err := summarizeWithFallback(context.Background(), provider, []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleUser, Content: "msg-0"},
-		{Role: zeroruntime.MessageRoleUser, Content: "msg-1"},
-	}, nil)
-	if err == nil {
-		t.Fatal("expected a non-context-limit error to propagate")
-	}
-	if got := atomic.LoadInt32(&provider.calls); got != 1 {
-		t.Fatalf("a non-context error must not trigger splitting/retry, calls=%d", got)
-	}
-}
-
-func TestSummarizeWithFallbackSingleMessageContextLimitSurfaces(t *testing.T) {
-	// A single message that still won't fit can't be split further → error surfaces.
-	provider := &sizeLimitedSummarizer{maxMarkers: 0}
-	_, err := summarizeWithFallback(context.Background(), provider, []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleUser, Content: "msg-0 too big"},
-	}, nil)
-	if err == nil {
-		t.Fatal("expected the context-limit error to surface for an unsplittable single message")
-	}
-}
-
-// usageReportingSummarizer emits a usage event so a test can assert the
-// summarizer's token cost is forwarded to OnUsage.
-type usageReportingSummarizer struct{}
-
-func (usageReportingSummarizer) StreamCompletion(_ context.Context, _ zeroruntime.CompletionRequest) (<-chan zeroruntime.StreamEvent, error) {
-	ch := make(chan zeroruntime.StreamEvent, 3)
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventText, Content: "summary"}
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventUsage, Usage: zeroruntime.Usage{PromptTokens: 100, CompletionTokens: 20}}
-	ch <- zeroruntime.StreamEvent{Type: zeroruntime.StreamEventDone}
-	return ch, nil
-}
-
-func TestSummarizeForwardsUsageButNotText(t *testing.T) {
-	// Compaction must stay invisible to the user (no OnText), but its token cost
-	// MUST be counted, so OnUsage has to fire for the summarizer call.
-	var got zeroruntime.Usage
-	var calls int
-	summary, err := summarizeWithFallback(context.Background(), usageReportingSummarizer{}, []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleUser, Content: "hello"},
-	}, func(u zeroruntime.Usage) { calls++; got = u })
-	if err != nil {
-		t.Fatalf("summarize failed: %v", err)
-	}
-	if summary != "summary" {
-		t.Fatalf("unexpected summary: %q", summary)
-	}
-	if calls != 1 {
-		t.Fatalf("expected OnUsage to fire once, got %d", calls)
-	}
-	if got.PromptTokens != 100 || got.CompletionTokens != 20 {
-		t.Fatalf("unexpected forwarded usage: %#v", got)
-	}
-}

internal/agent/compaction_test.go

@@ -7,7 +7,6 @@ import (
 	"testing"
 
 	"github.com/Gitlawb/zero/internal/tools"
-	"github.com/Gitlawb/zero/internal/trace"
 	"github.com/Gitlawb/zero/internal/zeroruntime"
 )
 
@@ -59,15 +58,12 @@ func TestCompactKeepsSystemAndPreservedSuffix(t *testing.T) {
 	if last.Content != "most recent question" {
 		t.Fatalf("expected most recent message preserved, got %q", last.Content)
 	}
-	// The summarizer receives a compact semantic projection of the middle rather
-	// than reconstructible raw tool output.
-	if len(captured) != 1 || captured[0].Role != zeroruntime.MessageRoleUser {
-		t.Fatalf("expected one projected summary input, got %#v", captured)
+	// The summarized middle excludes system and preserved suffix.
+	if len(captured) != 3 {
+		t.Fatalf("expected 3 summarized messages, got %d: %#v", len(captured), captured)
 	}
-	for _, want := range []string{"[user #0]", "first question", "[assistant #1]", "first answer", "second question"} {
-		if !strings.Contains(captured[0].Content, want) {
-			t.Fatalf("projected summary input missing %q: %q", want, captured[0].Content)
-		}
+	if captured[0].Content != "first question" {
+		t.Fatalf("expected oldest non-system message first, got %#v", captured[0])
 	}
 	// Compaction must shrink the conversation.
 	if estimateTokens(result) >= estimateTokens(messages) {
@@ -156,59 +152,6 @@ func TestCompactPropagatesSummarizeError(t *testing.T) {
 	}
 }
 
-// scriptedSummaryProvider returns, per StreamCompletion call, either an error
-// event (when the script entry is non-empty) or a success text, so a test can
-// drive the recursive summarizeWithFallback split/reduce path deterministically.
-type scriptedSummaryProvider struct {
-	calls   int
-	scripts []string
-}
-
-func (p *scriptedSummaryProvider) StreamCompletion(_ context.Context, _ zeroruntime.CompletionRequest) (<-chan zeroruntime.StreamEvent, error) {
-	i := p.calls
-	p.calls++
-	if i < len(p.scripts) && p.scripts[i] != "" {
-		return streamEvents([]zeroruntime.StreamEvent{{Type: zeroruntime.StreamEventError, Error: p.scripts[i]}}), nil
-	}
-	return streamEvents([]zeroruntime.StreamEvent{
-		{Type: zeroruntime.StreamEventText, Content: "PARTIAL"},
-		{Type: zeroruntime.StreamEventDone},
-	}), nil
-}
-
-func TestSummarizeWithFallbackPropagatesNonContextReduceError(t *testing.T) {
-	msgs := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleUser, Content: "a"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "b"},
-	}
-	ctxLimit := "This model's maximum context length is 1000 tokens. Please reduce the length of the messages."
-	// call 1 (full slice): context-limit → split; calls 2,3 (halves): succeed;
-	// call 4 (reduce of the two partials): a NON-context provider error that must
-	// surface unchanged rather than be masked by the joined-text fallback.
-	provider := &scriptedSummaryProvider{scripts: []string{ctxLimit, "", "", "provider request failed: 401 unauthorized"}}
-	if _, err := summarizeWithFallback(context.Background(), provider, msgs, func(Usage) {}); err == nil || !strings.Contains(err.Error(), "401") {
-		t.Fatalf("a non-context reduce error must surface, got %v", err)
-	}
-}
-
-func TestSummarizeWithFallbackUsesJoinedTextOnContextLimitReduce(t *testing.T) {
-	msgs := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleUser, Content: "a"},
-		{Role: zeroruntime.MessageRoleAssistant, Content: "b"},
-	}
-	ctxLimit := "This model's maximum context length is 1000 tokens. Please reduce the length of the messages."
-	// Same split, but the reduce also hits a context-limit: fall back to the joined
-	// partial summaries instead of failing.
-	provider := &scriptedSummaryProvider{scripts: []string{ctxLimit, "", "", ctxLimit}}
-	got, err := summarizeWithFallback(context.Background(), provider, msgs, func(Usage) {})
-	if err != nil {
-		t.Fatalf("a context-limit reduce must fall back to joined text, got error %v", err)
-	}
-	if !strings.Contains(got, "PARTIAL") {
-		t.Fatalf("joined fallback should contain the partial summaries, got %q", got)
-	}
-}
-
 // --- estimateTokens tests -------------------------------------------------
 
 func TestEstimateTokensMonotonic(t *testing.T) {
@@ -237,75 +180,6 @@ func TestEstimateTokensCountsToolCallsAndResults(t *testing.T) {
 	}
 }
 
-func TestEstimateTokensCountsImages(t *testing.T) {
-	// A tiny image carries far more model tokens than its text content suggests;
-	// the estimate must rise with each image so an image-heavy context still
-	// trends toward compaction instead of reading as ~0.
-	plain := []zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: "look"}}
-	withImage := []zeroruntime.Message{{
-		Role:    zeroruntime.MessageRoleUser,
-		Content: "look",
-		Images:  []zeroruntime.ImageBlock{{MediaType: "image/png", Data: []byte("tiny")}},
-	}}
-	twoImages := []zeroruntime.Message{{
-		Role:    zeroruntime.MessageRoleUser,
-		Content: "look",
-		Images: []zeroruntime.ImageBlock{
-			{MediaType: "image/png", Data: []byte("tiny")},
-			{MediaType: "image/png", Data: []byte("tiny")},
-		},
-	}}
-	if estimateTokens(withImage) <= estimateTokens(plain) {
-		t.Fatal("expected an image to increase the token estimate")
-	}
-	if estimateTokens(twoImages) <= estimateTokens(withImage) {
-		t.Fatal("expected the estimate to grow with image count")
-	}
-}
-
-func TestEstimateToolDefTokensCountsDefinitions(t *testing.T) {
-	if got := estimateToolDefTokens(nil); got != 0 {
-		t.Fatalf("no tools should estimate 0 tokens, got %d", got)
-	}
-	one := []zeroruntime.ToolDefinition{{
-		Name:        "read_file",
-		Description: "Read a file from the workspace and return its contents.",
-		Parameters:  map[string]any{"type": "object", "properties": map[string]any{"path": map[string]any{"type": "string"}}},
-	}}
-	if estimateToolDefTokens(one) <= 0 {
-		t.Fatal("a tool definition (name + description + schema) should estimate > 0 tokens")
-	}
-	typed := append([]zeroruntime.ToolDefinition(nil), one...)
-	typed[0].Type = zeroruntime.ToolDefinitionFreeform
-	if estimateToolDefTokens(typed) <= estimateToolDefTokens(one) {
-		t.Fatal("a non-empty tool type must increase the estimated request cost")
-	}
-	for _, test := range []struct {
-		name   string
-		format zeroruntime.ToolDefinitionFormat
-	}{
-		{name: "type", format: zeroruntime.ToolDefinitionFormat{Type: "grammar"}},
-		{name: "syntax", format: zeroruntime.ToolDefinitionFormat{Syntax: "lark"}},
-		{name: "definition", format: zeroruntime.ToolDefinitionFormat{Definition: "start: WORD"}},
-	} {
-		t.Run("format "+test.name, func(t *testing.T) {
-			formatted := append([]zeroruntime.ToolDefinition(nil), one...)
-			formatted[0].Format = &test.format
-			if estimateToolDefTokens(formatted) <= estimateToolDefTokens(one) {
-				t.Fatalf("a non-empty format %s must increase the estimated request cost", test.name)
-			}
-		})
-	}
-	two := append(append([]zeroruntime.ToolDefinition{}, one...), zeroruntime.ToolDefinition{
-		Name:        "write_file",
-		Description: "Write contents to a file in the workspace.",
-		Parameters:  map[string]any{"type": "object"},
-	})
-	if estimateToolDefTokens(two) <= estimateToolDefTokens(one) {
-		t.Fatal("the estimate must grow with more tool definitions")
-	}
-}
-
 // --- Loop integration: provider mocks -------------------------------------
 
 // summarizeRecordingProvider returns scripted turns for the main agent loop
@@ -361,7 +235,7 @@ func TestRunProactiveCompactionTriggers(t *testing.T) {
 	}
 
 	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedReadFileTool(t.TempDir(), nil))
+	registry.Register(tools.NewReadFileTool(t.TempDir()))
 
 	result, err := Run(context.Background(), strings.Repeat("y", 8000), provider, Options{
 		Registry:               registry,
@@ -389,7 +263,7 @@ func TestRunNoCompactionWhenContextWindowZero(t *testing.T) {
 		},
 	}
 	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedReadFileTool(t.TempDir(), nil))
+	registry.Register(tools.NewReadFileTool(t.TempDir()))
 
 	_, err := Run(context.Background(), strings.Repeat("y", 8000), provider, Options{
 		Registry:       registry,
@@ -404,43 +278,6 @@ func TestRunNoCompactionWhenContextWindowZero(t *testing.T) {
 	}
 }
 
-func TestMaybeCompactStopsAfterSupersededReadsReachThreshold(t *testing.T) {
-	body := strings.Repeat("same source line\n", 1000)
-	messages := []zeroruntime.Message{
-		{Role: zeroruntime.MessageRoleSystem, Content: "system"},
-		toolCallWithArgs("old", "read_file", `{"path":"a.go"}`),
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "old", Content: body},
-		toolCallWithArgs("new", "read_file", `{"path":"a.go"}`),
-		{Role: zeroruntime.MessageRoleTool, ToolCallID: "new", Content: body},
-	}
-	pruned, reclaimed := pruneSupersededReadResults(messages)
-	if reclaimed <= 0 {
-		t.Fatal("test setup did not reclaim superseded read output")
-	}
-	prunedSize := estimateTokens(pruned)
-	if estimateTokens(messages) <= prunedSize {
-		t.Fatal("test setup does not cross the compaction threshold")
-	}
-
-	provider := &summarizeRecordingProvider{}
-	state := &compactionState{
-		enabled:      true,
-		threshold:    prunedSize,
-		preserveLast: 2,
-	}
-	got := state.maybeCompact(context.Background(), provider, messages, nil)
-
-	if provider.summarizeCalls != 0 {
-		t.Fatalf("cheap pruning should avoid the summarizer, got %d calls", provider.summarizeCalls)
-	}
-	if state.lowWaterMark != prunedSize {
-		t.Fatalf("lowWaterMark = %d, want %d", state.lowWaterMark, prunedSize)
-	}
-	if !strings.Contains(got[2].Content, "superseded identical") || got[4].Content != body {
-		t.Fatalf("unexpected pruned messages: %#v", got)
-	}
-}
-
 // reactiveProvider builds up history with a tool call on turn 1, then errors
 // with a context-limit message on turn 2 (once the history is large enough that
 // compaction can shrink it), then succeeds on the same-turn retry. Summary
@@ -450,7 +287,6 @@ type reactiveProvider struct {
 	summarizeCalls int
 	turnRequests   int
 	failedOnce     bool
-	connectError   bool
 	bigText        string
 	finalText      string
 }
@@ -472,9 +308,6 @@ func (provider *reactiveProvider) StreamCompletion(ctx context.Context, request
 		return streamEvents(toolTurnWithText(provider.bigText, "1", "read_file", `{"path":"x"}`)), nil
 	case provider.turnRequests == 2 && !provider.failedOnce:
 		provider.failedOnce = true
-		if provider.connectError {
-			return nil, errors.New("context_length_exceeded")
-		}
 		return streamEvents([]zeroruntime.StreamEvent{
 			{Type: zeroruntime.StreamEventError, Error: "This model's maximum context length is 1000 tokens. Please reduce the length of the messages."},
 		}), nil
@@ -483,39 +316,6 @@ func (provider *reactiveProvider) StreamCompletion(ctx context.Context, request
 	}
 }
 
-func TestRunConnectErrorCompactionRecordsReplacementPlan(t *testing.T) {
-	provider := &reactiveProvider{
-		connectError: true,
-		bigText:      strings.Repeat("b", 6000),
-		finalText:    "recovered",
-	}
-	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedReadFileTool(t.TempDir(), nil))
-	recorder := trace.NewRecorder("connect-compaction", "run-1", "test")
-	var contextPlans []ContextBreakdown
-
-	result, err := Run(context.Background(), strings.Repeat("z", 6000), provider, Options{
-		Registry:               registry,
-		PermissionMode:         PermissionModeUnsafe,
-		ContextWindow:          10_000_000,
-		CompactionPreserveLast: 2,
-		Trace:                  recorder,
-		OnContext: func(breakdown ContextBreakdown) {
-			contextPlans = append(contextPlans, breakdown)
-		},
-	})
-	if err != nil || result.FinalAnswer != "recovered" {
-		t.Fatalf("connect-error compaction failed: result=%#v err=%v", result, err)
-	}
-	if len(contextPlans) != 3 || contextPlans[2].MessageTokens >= contextPlans[1].MessageTokens {
-		t.Fatalf("replacement request context not reported: %#v", contextPlans)
-	}
-	gotTrace := recorder.Finish()
-	if len(gotTrace.PrefixHashes) != 4 || gotTrace.PrefixHashes[3].InvalidationReason != "unchanged" {
-		t.Fatalf("replacement request trace not recorded: %#v", gotTrace.PrefixHashes)
-	}
-}
-
 func TestRunReactiveCompactionRecovers(t *testing.T) {
 	provider := &reactiveProvider{
 		bigText:   strings.Repeat("b", 6000),
@@ -526,9 +326,7 @@ func TestRunReactiveCompactionRecovers(t *testing.T) {
 	// the compaction closure. read_file also returns a sizeable result that
 	// bloats the history.
 	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedReadFileTool(t.TempDir(), nil))
-	recorder := trace.NewRecorder("reactive-compaction", "run-1", "test")
-	var contextPlans []ContextBreakdown
+	registry.Register(tools.NewReadFileTool(t.TempDir()))
 
 	// ContextWindow large enough that proactive compaction never triggers, so
 	// only the reactive path can save the run.
@@ -537,10 +335,6 @@ func TestRunReactiveCompactionRecovers(t *testing.T) {
 		PermissionMode:         PermissionModeUnsafe,
 		ContextWindow:          10_000_000,
 		CompactionPreserveLast: 2,
-		Trace:                  recorder,
-		OnContext: func(breakdown ContextBreakdown) {
-			contextPlans = append(contextPlans, breakdown)
-		},
 	})
 	if err != nil {
 		t.Fatalf("expected reactive compaction to recover the run, got error: %v", err)
@@ -551,25 +345,6 @@ func TestRunReactiveCompactionRecovers(t *testing.T) {
 	if provider.summarizeCalls == 0 {
 		t.Fatal("expected reactive compaction to invoke the summarizer")
 	}
-	if len(contextPlans) != 3 {
-		t.Fatalf("main request context callbacks = %d, want initial turns plus compacted retry", len(contextPlans))
-	}
-	if contextPlans[2].MessageTokens >= contextPlans[1].MessageTokens {
-		t.Fatalf("retry context was not updated after compaction: before=%d after=%d", contextPlans[1].MessageTokens, contextPlans[2].MessageTokens)
-	}
-	gotTrace := recorder.Finish()
-	if len(gotTrace.PrefixHashes) != 4 {
-		t.Fatalf("prefix evidence count = %d, want two turns, compaction, and retry: %#v", len(gotTrace.PrefixHashes), gotTrace.PrefixHashes)
-	}
-	if gotTrace.PrefixHashes[0].InvalidationReason != "initial" ||
-		gotTrace.PrefixHashes[1].InvalidationReason != "unchanged" ||
-		gotTrace.PrefixHashes[2].InvalidationReason != "initial" ||
-		gotTrace.PrefixHashes[3].InvalidationReason != "unchanged" {
-		t.Fatalf("unexpected request-specific invalidation evidence: %#v", gotTrace.PrefixHashes)
-	}
-	if gotTrace.PrefixHashes[2].CompletePrefixHash == gotTrace.PrefixHashes[1].CompletePrefixHash {
-		t.Fatalf("compaction fingerprint reused the main request prefix: %#v", gotTrace.PrefixHashes)
-	}
 }
 
 // midStreamReactiveProvider forwards some text BEFORE surfacing a context-limit
@@ -615,7 +390,7 @@ func TestRunReactiveRetryDoesNotDoubleEmitText(t *testing.T) {
 		finalText:   "recovered",
 	}
 	registry := tools.NewRegistry()
-	registry.Register(tools.NewScopedReadFileTool(t.TempDir(), nil))
+	registry.Register(tools.NewReadFileTool(t.TempDir()))
 
 	var deltas []string
 	result, err := Run(context.Background(), strings.Repeat("z", 6000), provider, Options{
@@ -634,9 +409,9 @@ func TestRunReactiveRetryDoesNotDoubleEmitText(t *testing.T) {
 	if provider.summarizeCalls == 0 {
 		t.Fatal("expected reactive compaction to run")
 	}
-	// The retried turn's text must NOT be re-streamed to OnText. Before the fix it
-	// was emitted on both the original (mid-stream) collect AND the retry collect,
-	// double-emitting the retried response.
+	// The retried turn's text must be streamed to OnText at most once. Before the
+	// fix it was emitted on both the original (mid-stream) collect AND the retry
+	// collect, double-emitting the retried response.
 	joined := strings.Join(deltas, "")
 	if got := strings.Count(joined, "recovered"); got != 0 {
 		t.Fatalf("retried-turn text must NOT be re-streamed to OnText, saw %d occurrences in %q", got, joined)
@@ -705,7 +480,7 @@ func TestCompactNeverProducesConsecutiveUserMessages(t *testing.T) {
 }
 
 func TestRecoverNoopDoesNotConsumeReactiveBudget(t *testing.T) {
-	st := newCompactionState(Options{ContextWindow: 1000, CompactionPreserveLast: 2}, nil)
+	st := newCompactionState(Options{ContextWindow: 1000, CompactionPreserveLast: 2})
 	provider := &mockProvider{turns: [][]zeroruntime.StreamEvent{{
 		{Type: zeroruntime.StreamEventText, Content: "SUMMARY"}, {Type: zeroruntime.StreamEventDone},
 	}}}
@@ -716,7 +491,7 @@ func TestRecoverNoopDoesNotConsumeReactiveBudget(t *testing.T) {
 		{Role: zeroruntime.MessageRoleSystem, Content: "sys"},
 		{Role: zeroruntime.MessageRoleUser, Content: "hi"},
 	}
-	_, retried, err := st.recover(context.Background(), provider, tiny, nil, "context length exceeded")
+	_, retried, err := st.recover(context.Background(), provider, tiny, "context length exceeded")
 	if err != nil {
 		t.Fatalf("unexpected error from no-op recover: %v", err)
 	}
@@ -736,7 +511,7 @@ func TestRecoverNoopDoesNotConsumeReactiveBudget(t *testing.T) {
 		{Role: zeroruntime.MessageRoleAssistant, Content: "a2"},
 		{Role: zeroruntime.MessageRoleUser, Content: "u3"},
 	}
-	compacted, retried, err := st.recover(context.Background(), provider, big, nil, "context length exceeded")
+	compacted, retried, err := st.recover(context.Background(), provider, big, "context length exceeded")
 	if err != nil {
 		t.Fatalf("unexpected error from second recover: %v", err)
 	}
@@ -752,14 +527,14 @@ func TestRecoverNoopDoesNotConsumeReactiveBudget(t *testing.T) {
 }
 
 func TestRecoverDisabledIsNoop(t *testing.T) {
-	st := newCompactionState(Options{ContextWindow: 0}, nil)
+	st := newCompactionState(Options{ContextWindow: 0})
 	msgs := []zeroruntime.Message{{Role: zeroruntime.MessageRoleUser, Content: "x"}}
 	called := false
 	// recover must not invoke the provider/summarize when disabled, even on a
 	// context-limit error string.
 	got, retried, err := st.recover(context.Background(), &mockProvider{turns: [][]zeroruntime.StreamEvent{{
 		{Type: zeroruntime.StreamEventText, Content: "should not be called"}, {Type: zeroruntime.StreamEventDone},
-	}}}, msgs, nil, "context length exceeded")
+	}}}, msgs, "context length exceeded")
 	_ = called
 	if retried || err != nil || len(got) != 1 {
 		t.Fatalf("disabled recover must be a no-op, got retried=%v err=%v len=%d", retried, err, len(got))