fix(web): home posture note names the frames that show the model and Ask setting; the OrcaRouter offer returns below the first screen; changelog gating sentence corrected (CW-8048 HOME-2 version B, repair 1)

The note under the hero picture said the frames before and after show the model name and the Ask setting; the Edit frame next to Approval shows neither. It now says the Prompt and Result frames show them, which the capture's flags confirm at both widths, in all 18 locales and the GT catalog. Founder decision 156: the dated OrcaRouter offer strip from CW-7933 is restored unchanged (partner-promo.ts, markup and styles from cc0d42bf4a, English only, referral disclosure, days left computed at render, hidden after 2026-11-21), placed after the model section, so the first screen is as accepted. The CHANGELOG said the page names several agents only while the release has it; only the facts row is gated. Corrected, and it now says the offer strip stays below the first screen. TUI changelog resynced. Checks: npm test 1301 passed + 7 node, tsc, lint, check:locales, check:tokens and build all exit 0. Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
docs(changelog): the home page line says what the rebuild removed (CW-8048 HOME-2 version B)
2026-11-11 10:01:30 -10:00 · 2026-11-11 10:34:25 -08:00 · 2026-11-11 10:34:21 -08:00 · 2026-11-11 10:34:17 -08:00 · 2026-11-11 10:34:13 -08:00 · 2026-11-11 10:34:09 -08:00
667 changed files with 50914 additions and 10312 deletions
@@ -65,6 +65,12 @@ crates/engine/extension-host/dist/** text eol=lf
 crates/engine/tests/fixtures/extension_host/** text eol=lf
 crates/engine/extension-host/src/dsh/dsh-message-compat.js text eol=lf

+# DeepSeek Harness creator pins are compared byte for byte against recorded
+# SHA-256 values (UPSTREAM.json) and embedded with include_bytes!(); a CRLF
+# Windows checkout must not rewrite any of them.
+crates/skills/assets/dsh-creator/** text eol=lf
+crates/engine/extension-host/src/dsh/upstream/creator/** text eol=lf
+
 # Rustfmt writes LF; keep Rust sources stable across Windows/Linux/macOS.
 *.rs text eol=lf

@@ -14,7 +14,8 @@ name: Main landing gate
 # This job is deliberately narrow. It runs `scripts/preflight.sh --check`,
 # which is the checked-in local preflight for exactly the class of breakage that
 # reaches `main` unnoticed: rustfmt, the CHANGELOG slice, README locale stamps,
-# the dead-code and blocking-calls budgets, generated-asset drift, and the
+# the dead-code and blocking-calls budgets, generated-asset drift (including
+# the website's generated facts, agent docs and feature registry), and the
 # feature receipts. Measured at 45 s on a warm Linux runner.
 #
 # Since 2026-11-08 (founder) the `full-ci` job also dispatches `ci.yml` on every
@@ -50,6 +51,10 @@ jobs:
          toolchain: stable
          components: rustfmt

+      - uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
+        with:
+          node-version: 22
+
      - name: Preflight
        env:
          BEFORE_SHA: ${{ github.event.before }}
@@ -612,6 +612,7 @@ jobs:
          set -euo pipefail
          node web/scripts/sync-latest-release.mjs
          node web/scripts/derive-facts.mjs
+          node web/scripts/derive-release-docs.mjs
      - name: Prove the record passes the web fact gates
        env:
          GITHUB_TOKEN: ${{ github.token }}
@@ -620,6 +621,7 @@ jobs:
          node web/scripts/sync-latest-release.mjs --check
          node web/scripts/check-cloud-facts.mjs
          node web/scripts/check-facts.mjs
+          node web/scripts/check-release-docs.mjs
      - name: Propose the record to the default branch
        env:
          TAG: ${{ needs.resolve.outputs.tag }}
@@ -633,6 +635,8 @@ jobs:
            docs/cloud-facts/stable.json
            web/lib/facts.generated.ts
            web/data/agent-docs.generated.json
+            web/data/agent-docs.release.json
+            web/data/agent-docs.release-index.json
            web/data/features.generated.json
          )
          if git diff --quiet -- "${paths[@]}"; then
@@ -0,0 +1,319 @@
+name: Web maintainer
+
+on:
+  schedule:
+    - cron: '43 6 * * *'
+  workflow_dispatch:
+    inputs:
+      lane:
+        description: Which lane to run
+        required: true
+        default: all
+        type: choice
+        options:
+          - all
+          - derived
+          - copy-freshness
+          - link-health
+          - docs-drift
+
+permissions: {}
+
+concurrency:
+  group: web-maintainer
+  cancel-in-progress: false
+
+env:
+  WEB_MAINTAINER_CLI_VERSION: v0.10.2
+
+jobs:
+  plan:
+    name: Plan
+    if: github.repository == 'codewhale-hq/Codewhale' && github.ref == 'refs/heads/main' && vars.WEB_MAINTAINER_ENABLED == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions: {}
+    outputs:
+      lanes: ${{ steps.plan.outputs.lanes }}
+      derived: ${{ steps.plan.outputs.derived }}
+    steps:
+      - id: plan
+        env:
+          INPUT_LANE: ${{ inputs.lane || 'all' }}
+        run: |
+          derived=false
+          lanes='[]'
+          case "$INPUT_LANE" in
+            all) derived=true; lanes='["copy-freshness","link-health","docs-drift"]' ;;
+            derived) derived=true ;;
+            copy-freshness|link-health|docs-drift) lanes="[\"${INPUT_LANE}\"]" ;;
+            *) echo "::error::unknown lane"; exit 1 ;;
+          esac
+          echo "derived=${derived}" >> "$GITHUB_OUTPUT"
+          echo "lanes=${lanes}" >> "$GITHUB_OUTPUT"
+          echo "Web maintainer plan: derived=${derived} lanes=${lanes}" >> "$GITHUB_STEP_SUMMARY"
+
+  derived:
+    name: Derived files
+    needs: plan
+    if: needs.plan.result == 'success' && needs.plan.outputs.derived == 'true' && vars.WEB_MAINTAINER_ENABLED == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          ref: main
+          persist-credentials: false
+      - uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
+        with:
+          node-version: 22
+      - name: Install web dependencies
+        working-directory: web
+        run: npm ci --no-audit --no-fund
+      - name: Regenerate derived files
+        working-directory: web
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          node scripts/sync-latest-release.mjs
+          node scripts/derive-facts.mjs
+          node scripts/derive-changelog.mjs
+          node scripts/derive-install.mjs
+          node scripts/render-terminal-capture.mjs
+      - name: Check what changed
+        id: drift
+        run: |
+          mkdir -p "$RUNNER_TEMP/out"
+          if [ -n "$(git ls-files --others --exclude-standard)" ]; then
+            echo "::error::regeneration produced untracked files"
+            git ls-files --others --exclude-standard
+            exit 1
+          fi
+          git diff --name-status | node web/maintainer/check-allowlist.mjs web/maintainer/derived.txt derived
+          if [ -n "$(git diff --summary)" ]; then
+            echo "::error::regeneration created, deleted or changed modes"
+            exit 1
+          fi
+          git diff --binary > "$RUNNER_TEMP/out/change.patch"
+          if [ -s "$RUNNER_TEMP/out/change.patch" ]; then
+            echo "drift=true" >> "$GITHUB_OUTPUT"
+            git diff --stat >> "$GITHUB_STEP_SUMMARY"
+          else
+            echo "drift=false" >> "$GITHUB_OUTPUT"
+            echo "Derived files are current." >> "$GITHUB_STEP_SUMMARY"
+          fi
+      - name: Run the web checks on the regenerated tree
+        if: steps.drift.outputs.drift == 'true'
+        working-directory: web
+        run: |
+          npm run check
+          npx vitest run
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        if: steps.drift.outputs.drift == 'true'
+        with:
+          name: web-maintainer-derived
+          path: ${{ runner.temp }}/out/change.patch
+          retention-days: 3
+          if-no-files-found: error
+
+  lane:
+    name: Lane ${{ matrix.lane }}
+    needs: plan
+    if: needs.plan.result == 'success' && needs.plan.outputs.lanes != '[]' && vars.WEB_MAINTAINER_ENABLED == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    permissions:
+      contents: read
+    strategy:
+      fail-fast: false
+      max-parallel: 3
+      matrix:
+        lane: ${{ fromJSON(needs.plan.outputs.lanes) }}
+    env:
+      LANE: ${{ matrix.lane }}
+    steps:
+      - name: Require the DeepSeek key
+        env:
+          KEY: ${{ secrets.WEB_MAINTAINER_DEEPSEEK_API_KEY }}
+        run: |
+          if [ -z "$KEY" ]; then
+            echo "::error::WEB_MAINTAINER_DEEPSEEK_API_KEY is not set. Create a dedicated DeepSeek key with a provider-side monthly cap and add it as that repository secret, or unset WEB_MAINTAINER_ENABLED. See web/maintainer/README.md."
+            exit 1
+          fi
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          ref: main
+          persist-credentials: false
+      - uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
+        with:
+          node-version: 22
+      - name: Prove the command sandbox works or stop
+        run: |
+          sudo apt-get install -y --no-install-recommends bubblewrap util-linux >/dev/null
+          sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0 >/dev/null || true
+          probe="$GITHUB_WORKSPACE/.sandbox-probe"
+          rm -f "$probe" /usr/local/sandbox-probe
+          if ! timeout 10 bash -c 'exec 3<>/dev/tcp/api.deepseek.com/443'; then
+            echo "::error::the runner cannot reach api.deepseek.com, so the network denial cannot be proven."
+            exit 1
+          fi
+          if ! /usr/bin/bwrap --unshare-all --ro-bind / / --dev /dev --proc /proc --tmpfs /tmp \
+            --bind "$GITHUB_WORKSPACE" "$GITHUB_WORKSPACE" --chdir "$GITHUB_WORKSPACE" -- \
+            bash -c 'touch .sandbox-probe && ! touch /usr/local/sandbox-probe 2>/dev/null && ! timeout 10 bash -c "exec 3<>/dev/tcp/api.deepseek.com/443" 2>/dev/null'; then
+            echo "::error::bubblewrap did not confine a child on this runner (writes outside the workspace or outbound network were not denied). Refusing to give a model a shell."
+            exit 1
+          fi
+          if [ ! -e "$probe" ] || [ -e /usr/local/sandbox-probe ]; then
+            echo "::error::sandbox probe left unexpected state. Refusing to give a model a shell."
+            exit 1
+          fi
+          rm -f "$probe"
+          echo "Sandbox probe passed: workspace-only writes, no outbound network." >> "$GITHUB_STEP_SUMMARY"
+      - name: Stage trusted tooling and the pinned CLI
+        run: |
+          mkdir -p "$RUNNER_TEMP/trusted" "$RUNNER_TEMP/home"
+          cp web/maintainer/allowlist.txt web/maintainer/check-allowlist.mjs "$RUNNER_TEMP/trusted/"
+          cp "web/maintainer/lanes/${LANE}.md" "$RUNNER_TEMP/trusted/prompt.md"
+          CODEWHALE_VERSION="$WEB_MAINTAINER_CLI_VERSION" CODEWHALE_INSTALL_DIR="$RUNNER_TEMP/bin" sh web/public/install.sh
+          "$RUNNER_TEMP/bin/codewhale" --version
+      - name: Probe outbound links
+        if: matrix.lane == 'link-health'
+        run: node web/maintainer/link-report.mjs "$GITHUB_WORKSPACE/.git/maintainer-input/link-report.json"
+      - name: Record the git state the model must not change
+        run: |
+          git config --local --list | sort > "$RUNNER_TEMP/git-config.before"
+          find .git/hooks -type f ! -name '*.sample' > "$RUNNER_TEMP/hooks.before"
+          test ! -s "$RUNNER_TEMP/hooks.before"
+      - name: Run the lane on DeepSeek
+        timeout-minutes: 25
+        env:
+          WEB_MAINTAINER_DEEPSEEK_API_KEY: ${{ secrets.WEB_MAINTAINER_DEEPSEEK_API_KEY }}
+        run: |
+          env -i \
+            PATH="$PATH" \
+            HOME="$RUNNER_TEMP/home" \
+            CODEWHALE_HOME="$RUNNER_TEMP/home/.codewhale" \
+            CODEWHALE_SECRET_BACKEND=file \
+            CODEWHALE_MEMORY=false \
+            CODEWHALE_TELEMETRY=false \
+            DEEPSEEK_API_KEY="$WEB_MAINTAINER_DEEPSEEK_API_KEY" \
+            "$RUNNER_TEMP/bin/codewhale" \
+              --no-project-config \
+              --skip-onboarding \
+              --workspace "$GITHUB_WORKSPACE" \
+              exec \
+              --provider deepseek \
+              --model deepseek-flash \
+              --reasoning-effort low \
+              --auto \
+              --sandbox workspace-write \
+              --max-turns 40 \
+              --output-format stream-json \
+              -- "$(cat "$RUNNER_TEMP/trusted/prompt.md")" \
+            > "$RUNNER_TEMP/exec.jsonl"
+          echo "Model run finished: $(wc -l < "$RUNNER_TEMP/exec.jsonl") stream events." >> "$GITHUB_STEP_SUMMARY"
+      - name: Enforce the path allowlist
+        id: scope
+        run: |
+          if git status --porcelain --untracked-files=all --ignored | grep -qv '^ M '; then
+            echo "::error::the lane left untracked, ignored, staged or non-edit entries"
+            git status --porcelain --untracked-files=all --ignored | grep -v '^ M '
+            exit 1
+          fi
+          git config --local --list | sort | diff - "$RUNNER_TEMP/git-config.before" || { echo "::error::the lane changed .git/config"; exit 1; }
+          find .git/hooks -type f ! -name '*.sample' | diff - "$RUNNER_TEMP/hooks.before" || { echo "::error::the lane added git hooks"; exit 1; }
+          git diff --name-status | node "$RUNNER_TEMP/trusted/check-allowlist.mjs" "$RUNNER_TEMP/trusted/allowlist.txt" "$LANE"
+          if [ -n "$(git diff --summary)" ]; then
+            echo "::error::the lane created, deleted or changed modes"
+            exit 1
+          fi
+          mkdir -p "$RUNNER_TEMP/out"
+          git diff --binary > "$RUNNER_TEMP/out/change.patch"
+          if [ ! -s "$RUNNER_TEMP/out/change.patch" ]; then
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+            echo "Lane ${LANE}: no change proposed." >> "$GITHUB_STEP_SUMMARY"
+            exit 0
+          fi
+          if [ "$(wc -c < "$RUNNER_TEMP/out/change.patch")" -gt 262144 ]; then
+            echo "::error::patch exceeds 256 KiB"
+            exit 1
+          fi
+          echo "changed=true" >> "$GITHUB_OUTPUT"
+          { echo "Lane ${LANE} proposes:"; echo '```text'; git diff --stat; echo '```'; } >> "$GITHUB_STEP_SUMMARY"
+      - name: Fresh checkout for verification
+        if: steps.scope.outputs.changed == 'true'
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          ref: main
+          path: verify
+          persist-credentials: false
+      - name: Run the web checks on the proposal in a clean tree without secrets
+        if: steps.scope.outputs.changed == 'true'
+        env:
+          PATCH: ${{ runner.temp }}/out/change.patch
+        run: |
+          cd verify
+          git apply --index --whitespace=nowarn "$PATCH"
+          cd web
+          npm ci --no-audit --no-fund
+          npm run check
+          npx vitest run
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
+        if: steps.scope.outputs.changed == 'true'
+        with:
+          name: web-maintainer-${{ matrix.lane }}
+          path: ${{ runner.temp }}/out/change.patch
+          retention-days: 3
+          if-no-files-found: error
+
+  publish:
+    name: Open pull requests
+    needs: [plan, derived, lane]
+    if: always() && needs.plan.result == 'success' && vars.WEB_MAINTAINER_ENABLED == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8
+        continue-on-error: true
+        with:
+          pattern: web-maintainer-*
+          path: ${{ runner.temp }}/patches
+      - name: Look for proposed patches
+        id: patches
+        run: |
+          if [ -n "$(find "$RUNNER_TEMP/patches" -name change.patch -size +0c 2>/dev/null)" ]; then
+            echo "found=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "found=false" >> "$GITHUB_OUTPUT"
+            echo "No lane proposed a change; no pull request opened." >> "$GITHUB_STEP_SUMMARY"
+          fi
+      - if: steps.patches.outputs.found == 'true'
+        uses: actions/create-github-app-token@64ab729a6294000f5aa4a4bc0b73d1f32bc45510 # v3
+        id: app-token
+        with:
+          app-id: ${{ vars.CODEWHALE_APP_ID }}
+          private-key: ${{ secrets.CODEWHALE_APP_PRIVATE_KEY }}
+          permission-contents: write
+          permission-pull-requests: write
+      - if: steps.patches.outputs.found == 'true'
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
+        with:
+          ref: main
+          fetch-depth: 0
+          token: ${{ steps.app-token.outputs.token }}
+          persist-credentials: false
+      - name: Open or update one pull request per lane
+        if: steps.patches.outputs.found == 'true'
+        env:
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+          APP_ID: ${{ vars.CODEWHALE_APP_ID }}
+          ARTIFACTS_DIR: ${{ runner.temp }}/patches
+          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+        run: |
+          mkdir -p "$RUNNER_TEMP/trusted"
+          cp web/maintainer/allowlist.txt web/maintainer/derived.txt web/maintainer/check-allowlist.mjs web/maintainer/publish-prs.sh "$RUNNER_TEMP/trusted/"
+          TRUSTED_DIR="$RUNNER_TEMP/trusted" bash "$RUNNER_TEMP/trusted/publish-prs.sh"
@@ -7,28 +7,84 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

 ## [Unreleased]

+- **Git tool on older git:** the Git tool's `review_scope` action no longer passes `--no-lazy-fetch`, which git older than 2.44 rejects, so it failed on every call there. It sets `GIT_NO_LAZY_FETCH=1` instead, which keeps the same protection on newer git and is ignored by older git.
+- **Sandbox:** a managed configuration can set `tool_launcher` (Linux) to run every sandboxed tool command as another user, in front of bubblewrap; commands then run inside the sandbox or not at all, masks are computed for that user, `/tmp` is private per command, and `GET /v1/runtime/info` reports `sandbox.kind` and `sandbox.tool_launcher`. Without the key nothing changes. A managed configuration named by `CODEWHALE_MANAGED_CONFIG_PATH` is now applied on every load; a configuration whose provider comes from a plugin no longer loads with the managed file skipped, it fails to load instead.
+- **Receipts:** a terminal session's receipt (`/receipts`, `codewhale receipts`) now shows the provider's token counts and the same cost report `/cost` prints, saying "unknown" and why when the route's price is not known, never a guess. A Runtime thread's receipt shows token counts only; its cost line follows in a later release. `codewhale metrics` now counts usage saved in terminal sessions instead of reporting none. Sessions saved by 0.10.2 carry only a combined token total.
+- **ACP server on the official SDK:** The ACP server (`codewhale serve --acp`) now runs on the official Agent Client Protocol SDK. Its messages follow the official v1 types, and it no longer advertises the non-standard `modelSelection` capability or session `models` field. Session list entries carry `createdAt` and `messageCount` under `_meta.codewhale`, terminal sign-in methods are advertised only to clients that enabled terminal authentication, a notification is never answered, a permission request always carries text, and session list and configuration requests are served while a turn runs, response ids are echoed unchanged for every client (the Zed-only string rewrite is gone), and `initialize` without `protocolVersion` is refused with `-32602`.
+- **External agents over ACP:** Codewhale now drives external agents through the official Agent Client Protocol SDK. Request ids on the wire are strings, and an agent's error is treated as a sign-in problem only when it carries the protocol's auth-required code.
+- **Creator skills:** Codewhale now ships DeepSeek Harness's four plugin-authoring skills (`cordis-plugin-development`, `editing-cordis-compositions`, `cordis-composition-reference`, `agent-experience`) unmodified, with their reference and template files. A bundled skill can now carry files: `load_skill` prints the skill's base directory and a short Codewhale host-notes block after DSH's text. A copy you edited is never overwritten on upgrade. Source-level only: the Creator plugin switch and agent entry that make these useful land in later slices.
+- **Creator skills:** Codewhale now ships DeepSeek Harness's four plugin-authoring skills (`cordis-plugin-development`, `editing-cordis-compositions`, `cordis-composition-reference`, `agent-experience`) bundled, unmodified, with their reference and template files and DeepSeek's MIT notice beside each. They stay hidden from the model until Creator mode. A bundled skill can now carry files; `load_skill` prints its base directory and a short Codewhale host-notes block, and a file you edited is never overwritten on upgrade.
+- **Website home page, rebuilt around one first screen:** the headline stays "The model can be anyone's. The agent should be yours.", centred, with one plain sentence under it that says what Codewhale is (an open-source coding agent for your terminal, written in Rust, working with any model and able to split a task across several agents), the install command, and one wide picture of a real terminal session that runs off the bottom of the first screen. A row of facts under the picture takes its counts of provider routes and models from the published release, and the page says several agents share a task only while the release has it. The route of where the product is going moves lower and smaller, and the home page names no other tools. The new text in the 17 non-English languages is machine-drafted and is labelled as such in the footer; the Arabic page now reads the opening sentence right to left.
 - **Website home page:** the page is reorganized around what a visitor does: a dated OrcaRouter offer strip with a visible referral tag, one proof strip (release, stars, contributors), a models section with the newest first-party models, one capabilities section that includes Computer Use, an "Everything is a plugin" teaser and a community panel whose live GitHub numbers fill in from the browser and hide when unavailable. Unused home copy was removed from all 18 site languages.
+- **Website home page, rebuilt around one first screen:** the headline stays "The model can be anyone's. The agent should be yours.", centred, with one plain sentence under it that says what Codewhale is (an open-source coding agent for your terminal, written in Rust, working with any model and able to split a task across several agents), the install command, and one wide picture of a real terminal session that runs off the bottom of the first screen. A row of facts under the picture takes its counts of provider routes and models from the published release, and the page says several agents share a task only while the release has it. The route of where the product is going moves lower and smaller, and the home page names no other tools. This replaces the earlier reorganization of the home page, so the dated OrcaRouter offer strip and the community panel whose GitHub numbers filled in from the browser are no longer on it; the models and contribute pages keep their own content. The new text in the 17 non-English languages is machine-drafted and is labelled as such in the footer; the Arabic page now reads the opening sentence right to left.
+- **Website home page, rebuilt around one first screen:** the headline stays "The model can be anyone's. The agent should be yours.", centred, with one plain sentence under it that says what Codewhale is (an open-source coding agent for your terminal, written in Rust, working with any model and able to split a task across several agents), the install command, and one wide picture of a real terminal session that runs off the bottom of the first screen. A row of facts under the picture takes its counts of provider routes and models from the published release, and the facts row lists many agents on one task only while the release has it. The route of where the product is going moves lower and smaller, and the home page names no other coding agents. This replaces the earlier reorganization of the home page, so the community panel whose GitHub numbers filled in from the browser is no longer on it, and the dated OrcaRouter offer strip, English only, with its referral disclosure, stays below the first screen until it ends; the models and contribute pages keep their own content. The new text in the 17 non-English languages is machine-drafted and is labelled as such in the footer; the Arabic page now reads the opening sentence right to left.
 - **Website models and plugins:** /models leads with recently added models, three ways to connect (DeepSeek, first-party providers, any OpenAI-compatible endpoint) and a catalog grouped by maker; Ollama and OpenRouter are listed but no longer featured. /plugins leads with "Everything is a plugin" (credited to DeepSeek Harness) and shows MCP connectors from the connection catalog.
 - **Model catalog:** Claude Fable 5.2 (`claude-fable-5-2`) and Gemini 4 Carbon (`gemini-4-carbon`) are in the bundled catalog, and a daily catalog-refresh workflow proposes new first-party models from models.dev as a pull request. The workflow has not run in GitHub Actions yet.
+- **Gemini 4 output limit:** Gemini 4 Carbon and Gemini 4 Argon now allow 65,536 output tokens per reply, up from 32,768, matching Google's published limit.
+- **Anthropic xhigh effort:** Choosing xhigh effort on an Anthropic model that documents it, such as Claude Fable 5.2 or Claude Opus 4.8, now sends xhigh instead of max, so the model uses and bills the level you picked.
+- **Public model list:** The public model list gains GPT-6.1 Terra, Kimi K3.1 Pro (and its high-speed variant), MiniMax M3.1 Flash and Mistral Large 4, each marked unreviewed.
+- **Model Studio Token Plan:** Token Plan users can now pick `qwen4-max-preview` on both the OpenAI and Anthropic dialects. It was added from the model table Alibaba publishes on its Token Plan pricing page and has not been exercised against the live endpoint. Alibaba publishes no context window, output limit, tool calling or thinking control for it, so Codewhale records image input only and sends it no thinking switch on either dialect. The Coding Plan does not list it.
 - **Website brand and app pages:** the header, footer and favicon use the black-and-white Codewhale mark, keeping the colored whale for character moments. New /app and /docs/account pages say plainly that the desktop app is a development build, the browser app is not open yet, and how sign-in works where it exists. The terminal demo was recaptured from the 0.10.3 source.
+- **DSH plugin client review:** the DSH importer now reviews a plugin's client (`dsh.client`) files: the review lists every file the client loads with its SHA-256 and which modules the host must provide, and says exactly why a client stays disabled (for example an npm package that is not in the bundle, or a module loaded by a computed specifier). Plugin UI is still not shown; that needs the Engine client bootstrap.
+- **`codewhale exec` prompt input:** `codewhale exec "prompt"` no longer hangs when stdin is an open pipe that sends nothing (it continues after 2 s and says so, and a slow producer can be included by piping the prompt as well), and a flag typed after the prompt in full-width or typographic-dash form is rejected like `--auto` instead of being sent to the model as text. Tested on Unix only; no Windows, hosted CI or real-provider run.
 - **Website docs:** documentation pages no longer stack a second "Codewhale documentation" header under the site navigation; the line saying which release the docs describe now sits under the breadcrumb.
 - **Website languages:** the Roadmap and Contribute pages now show their titles, introductions and actions in all 18 site languages instead of English outside English and Chinese. The translations have had no native review yet.
 - **Responses dialect profiles:** Codex, DeepSeek and Concentrate Responses behavior now comes from one checked dialect table instead of per-provider code, a custom `wire = "responses"` provider can set `responses_profile = "standard"` (the default when omitted), and preview shows the profile each Responses request used. A Responses client whose route cannot be resolved now fails when it is created rather than at its first request ([#7261](https://github.com/codewhale-hq/Codewhale/pull/7261)). Thanks [@SamhandsomeLee](https://github.com/SamhandsomeLee).
+- **Read-only builtins over the Runtime API:** `POST /v1/threads/{id}/commands/builtin` runs `/system`, `/tokens` or `/cost` against a thread and returns the same answer the terminal prints, including the effective system prompt the engine sends. Any other command name answers 404, a thread whose engine is not loaded or has no live context estimate answers 409, and the route never starts an engine or writes settings ([#7277](https://github.com/codewhale-hq/Codewhale/pull/7277)). Verified by the app-server route tests and terminal-host tests; no editor client uses it yet. Thanks [@gaord](https://github.com/gaord).
 - **Automations:** a run missed while Codewhale was closed now waits on reopen for Run now or Skip instead of catching up silently; each automation can choose "If missed: ask" (default), "run once" or "skip". Tested in the engine only; no HTTP route tests, no desktop client yet, and a Mac asleep longer than the grace window counts as closed.
+- **Website maintainer:** a scheduled `web-maintainer` workflow proposes website upkeep as pull requests only: regenerated facts, and three DeepSeek lanes (stale version mentions, moved links, docs drift) that may edit only allowlisted copy files and must pass `npm run check` and the web tests. It is off until the repository variable `WEB_MAINTAINER_ENABLED` is set and a capped `WEB_MAINTAINER_DEEPSEEK_API_KEY` secret exists, and it has never run. The Worker's triage, PR-review, stale, duplicate and curate (Today's Dispatch drafting) cron tasks are removed; the digest stays.
 - **Website measurement:** the first-party ingest now accepts a closed website funnel schema while preserving existing runtime and browser batches. Reader confirmations remain self-reports, new website data stays first-party, and no deployment or live conversion gain is established by the source change.
+- **Website facts:** the website now reads the installed version, asset list and repository numbers from the published release and a dated snapshot instead of the source tree, shows nothing rather than 0 when a live number cannot be read, stamps its facts revision and date together, no longer calls the desktop app native, says when the release was read, and drops the price from its structured data. This is a source change and is not deployed yet.
+- **Website surface status:** the status of the terminal, browser, desktop, cloud and accounts surfaces now comes from typed states with copy in every locale, the desktop download appears only for a signed, notarized release with a checksum, the cloud-invitation and plan switches are committed values that default to off, the partner strip expires at render time, and repository numbers show when they were read. This is a source change and is not deployed yet.
+- **Website capabilities:** the website now lists a capability as available only when the published release has it, labels features that exist only in source as not yet released, keeps held features (cloud computers beyond invite-only, other vendors' agents over ACP, and plans) hidden behind committed switches that default to off, and prints provider route, catalog model and tool counts as they are at the published release tag instead of on main. This is not deployed yet.
+- **Installer uninstall lines:** the installers now print the uninstall command, the update-mode sentence and the shell-profile marker sentence only when the Codewhale they just installed reports an `uninstall` command, and older releases such as a pinned v0.10.2 get the manual removal steps instead of a command that would be sent to the model as a prompt. (CW-8029) The installers reach people through the website, so this is not deployed yet.
+- **Installer PATH ending:** when `codewhale` is not on PATH, the installers' last lines are now the copy-paste `export PATH=...; hash -r` command and `codewhale --version`, and when it is on PATH the last line is `Next: codewhale --version`; the Computer Use notice moves above them and shows on macOS only. (CW-8030) The installers reach people through the website, so this is not deployed yet.
+- **Installer PATH setup:** when the install directory is not on PATH, the macOS and Linux installers now add Codewhale's marked three-line PATH block to your shell profile, print exactly which file and lines they added and the command that removes them, and skip this with `--no-modify-path` or `CODEWHALE_NO_MODIFY_PATH=1`; the Windows archive installer adds the directory to your user PATH the same way and skips it with `-NoModifyPath`. Release archives carry this from 0.10.3 on, and the Windows installer has not been run yet. (CW-8036) The website serves install.sh, so this reaches people only when the website is next deployed.

 - **Website and docs:** installation now leads to a version check and a verifiable first task, article search finds text and commands with section links, and GitHub star links show the fetched count. The hero reuses the generated drone whale, and control/tool references distinguish the unpublished source candidate from v0.10.2; these website changes still await deployment.
+- **External agent options:** `GET /v1/agents/external/{id}/options?cwd=` returns the models, modes and options an external agent itself offers for a folder, and which Codewhale actions it will not carry. A saved agent model the agent no longer offers is refused with a stable `choice_not_offered` code instead of being ignored, per-turn settings an agent cannot honor are refused as `unsupported_control`, and each agent turn records the context window and tokens the agent reported, with cost shown as unknown (CW-7879). Probing starts a real agent session in the folder, which the agent may keep in its own history. Mode and config choices are listed but cannot yet be chosen through thread creation. Verified on Linux by unit and local HTTP tests against a fixture agent; no real installed agent, macOS, Windows or hosted CI run.
+- **External agent interrupts:** Interrupting a turn while an external agent waits for approval now answers the agent's permission request as cancelled. (CW-7958)
+- **External agent quota:** The Runtime API route `GET /v1/agents/external/quota` reports each external agent's quota as unknown with a reason (flag off, consent missing, not implemented). The new `agents.quota.<agent>` and `agents.quota.<agent>.consent` settings, saved through `POST /v1/config`, record the opt-in and consent (at most 32 agent entries). No agent credential is read. (CW-7993)

 ### Changed

+- **Docs for agents match the release:** `/llms-full.txt` and `/docs-markdown/*` now serve the documents as they were at the published release tag, from a committed snapshot that is checked against the published release.
+- **Extension host (experimental): trusted plugins ask for review once more.** With `extension_host` turned on, plugins you already trusted are shown for review again after this update, because the capability table they were reviewed against gained the `remote` service. No plugin can use that service yet: none is granted it.
+- **Website text for agents:** llms.txt now gives agents the install steps for the released version, the current release and the state of each part of Codewhale, from the same content as the pages. `/docs-markdown/install.md` serves those install steps as a page, and the main-branch documents beside it now say which release they can run ahead of.
+- **Website design:** codewhale.net now uses the desktop app's 5.3 light and dark colour roles and Geist / Geist Mono, replacing the warm-paper palette and Shannon Sans; the vendored design copy is synced to 5.3.0 and the whale-road ocean bands are unchanged.
+
+- ACP: editors can start, list, load, prompt and cancel Codewhale sessions and approve or reject tool permissions through the Runtime; prompts with image or audio blocks and relative session directories are now refused instead of ignored, and edit and read tools report the right kind. Sessions an editor drives now run the plugin tools (TypeScript and DSH, when the extension host is on) and the MCP servers configured in Codewhale; their calls show as ACP tool calls and ask through the session's permission setting, and `initialize` reports the state under `agentCapabilities._meta.codewhale`. MCP servers an editor passes in `mcpServers` and configured shell hooks still do not run in ACP sessions. A real-editor journey is not yet proved.
+- Extension host: the `sessions` and `systemPrompt` services now come from a reviewed DSH adapter instead of inline shims, and `sessions.flush` refuses an empty checkpoint ticket. Session reads and events and the `agent/pre-step` hook are still not available to plugins. (CW-7959)
+- Extension host: DSH service adapters now have one ticketed `dsh/broker` request to the core, each ticket is bound to the plugin, the service and the session, and every service (workspace, llm, network, settings, catalog, terminal and remote) refuses with a typed `not_available` until its broker lands. Nothing new is offered to plugins yet. (CW-8012)
+- **Plugin host services and who approved:** a plugin can now be granted a Codewhale host service, and only by a review that shows it. The review names each service and the plugins it is shared with, and every review records who approved it: you, the agent (in Full Access, in Auto-Review, or from a shell command carrying the agent's mark), or the command line with `--yes`; who turned the plugin on is recorded too. Plugins share one process, so a service works only while every loaded plugin of the same kind holds the same grant. A plugin the agent approved is active only in its own project and its code does not run beside the plugins you reviewed until you review it. No service is offered yet, and a plugin reviewed before this release holds no grant until it is reviewed again. Once a plugin has been reviewed or turned on in this release, Codewhale 0.10.2 and earlier cannot read the plugin state file and turn every plugin off when run on the same home folder. (CW-8012)
+- Fleet member starts are now durable: replaying an operation key after a timeout or restart returns the original worker, and GET /v1/threads/{id}/members/operations/{key} reports the outcome. A member start now answers with `state` `accepted` (200) or `unknown` (202) instead of `started` or `queued`. Verified by local HTTP tests on Linux; a real Engine restart is simulated, not exercised. (CW-7964)
+- Plugin activation now says when a requested service belongs to the Codewhale core and is not exposed to plugins yet. No plugin, provider or installed-app run exercised it; checked by the extension-host tests only.
 - Codex App Server v2 contract record (paused, not part of 0.10.3): the selected Codex v2 contract is frozen as a generated manifest in the protocol crate, with typed Rust and TypeScript shapes checked against the pinned Codex schema. It changes no wire behavior and adds no dispatch, so nothing is reachable through it yet.
+- **Website copy:** The site's headline is now "The model can be anyone's. The agent should be yours.", with its subhead, belief and labelled product map in every language.
+- **Website routes:** Pages that repeated each other now redirect to the one page that does the job, the header and footer list only pages that exist under their current names, the sitemap drops redirected and catalogue pages, and machine-drafted translations say so.
+- **Website privacy:** The website no longer counts anything when your browser sends Global Privacy Control or Do Not Track, and the privacy page says exactly what is counted and how it is keyed.
+- Plugin UI: the Runtime API now serves reviewed DSH client closures on six seats (customize.plugins.detail, conversation.composer.dock, conversation.chat.node, workpane.panel, sidebar.section, command.row) with coded refusals, drops a plugin's UI grants the moment it is disabled, revoked or uninstalled, and adds a plugin route bridge that refuses until a plugin web server exists. No real DSH package has been served end to end yet, and a client that imports `@deepseek-ai/dsh-client-*` modules is still refused. (CW-7956)

 ### Fixed

+- **Starting after a hard kill:** the Engine now starts when its process was killed and its data directory was then deleted. A socket owner record whose process is dead and whose data directory, the one this start selected, no longer exists is discarded instead of failing every start with "Failed to resolve ... tasks/runtime". A home reached through a symbolic link, such as one under macOS /tmp, is not covered yet.
+- The install guide's note for a first message that gets no answer now describes v0.10.2: connect a model with `/provider`, and restart if messages stay saved for later after you connect. It described v0.10.0's key screen. The Chinese guide carries the same correction.
+- Project activity on the site now comes from a server-side snapshot with a freshness record, the browser no longer calls GitHub, and count sentences use the right plural form in every language.
+- The install page now gives the exact steps for the released version on every platform, including what the installer adds to PATH, how to turn off usage counting, and how to remove it, and the install command no longer gets cut off on phones.
+- After choosing "explore offline" on first run, connecting a provider or Custom endpoint with /provider now takes effect immediately; messages are no longer held as "Saved for later" until restart, and a message held while offline returns to the composer.
+- The pet browser view opens with a one-time code instead of the long-lived owner token, so the token no longer appears in the URL or the launcher command line. The code lasts 30 seconds and works once; the owner token itself is still stored in the cookie and connection file and is not rotated. Not run in a real browser.
+- On Windows with Caps Lock on, Ctrl+E moves to the end of the line again instead of opening the file tree; the file tree now needs an explicit Shift (Ctrl+Shift+E or Cmd+Shift+E), so a terminal that reports an uppercase E with Ctrl but no Shift flag can no longer toggle it. The Caps Lock key event is simulated from the input library source; no native Windows run.
 - External agents installed through npm on Windows (`claude.cmd`, `codex.cmd`, ...) are now found instead of the unrunnable shell shim, `GET /v1/agents/external` says whether an agent answered with an unsupported protocol rather than reporting every failure as no answer, and a hung `--version` or handshake probe no longer leaves the agent's child processes running. Verified on macOS and Linux; the Windows code has never been compiled or run, and no agent row is qualified by this change.
 - The Runtime API's `POST /v1/git/push` now pushes exactly one branch at one commit (`<commit>:refs/heads/<branch>`, no follow-tags or submodule recursion), so `push.default`, `remote.<name>.push` and `push.followTags` can no longer publish other branches or tags. Clients can bind a push to a named branch and expected HEAD with `branch` + `expect.head` (advertised as `named_push` in `GET /v1/git`); a stale branch or HEAD answers `409 git_state_changed` and pushes nothing. A bare push from a detached HEAD or an unborn branch is now refused, and the desktop app has not yet adopted the named form. Verified on macOS by unit tests against a local bare remote; no real network remote, Linux, Windows or hosted CI run.
 - Cancelling or timing out a read-only Git tool (git_status, git_diff, git_commit_plan, git_log, git_show, git_blame, git_merge_tree) now stops the git process and anything it started, instead of leaving it running in the background. Verified on macOS by unit tests; Linux, Windows and hosted CI are not yet run, and the filter-override probe is still not contained.
 - TUI: the launch resume confirmation no longer treats Meta+Enter, Meta+Y or Hyper+Enter as "resume"; only a plain Enter/Y or Shift+Y answers it. Verified by the focused unit tests only; not tried in a terminal that sends Meta or Hyper.
+- TUI: mentioning a huge directory or a far-away line range (`@file:N-M`) now stops after a bounded scan and says the result is partial instead of claiming end of file. Verified by the focused `file_mention` unit tests; no real 64 MiB file was tried.
+- Runtime `patch-undo` now restores a turn's own file changes in the default (Ask) posture without trust mode or Full Access; later edits and changes the turn did not make are still refused with nothing changed, and the `restore_requires_trust` error code is gone ([#6970](https://github.com/codewhale-hq/Codewhale/issues/6970)). Verified by app-server and TUI unit tests on Linux; no Windows `/undo` or process-restart run.
+- **Website terminal frames:** The site can render terminal frames captured from the released version, and chooses each frame's caption from where it was captured.
+- **Website docs truth:** Documentation pages now describe the released version first and show what exists only in source in a labelled section that switches on when a release carries it.
+- **Website Arabic pages:** On Arabic pages, English text that has no translation yet keeps its own direction and language, so punctuation, commands and dates no longer appear reversed.
+- A DSH plugin whose package includes a `.gitignore` at its root now installs instead of being refused as a hidden file; nested `.gitignore` files, other hidden files, credential files and links are still refused. (CW-8023)
+- `install.bat` in the Windows release archive now passes its arguments to `install.ps1`, so `install.bat -NoModifyPath` declines the user PATH edit like the PowerShell installer does, and the install guide says so. It has not been run on Windows. The batch file reaches people in the next release archive, and the guide sentence when the website is next deployed, because the site serves the guide but not `install.bat`. (CW-8046)

 ## [0.10.3] - 2026-11-08

@@ -37,11 +93,12 @@ until the matching tag, packages, checksums, and release assets exist.

 ### Work in progress and known limits

-This source candidate is not the final 0.10.3 tag. The 2026-11-08 scope
-decision keeps App Server v2, the coarse Engine split and DSH all-33
-compatibility in 0.10.3; the final tag waits for that full list. The near-term
-`0.10.3-beta.2` is a GitHub prerelease for the Boat image and desktop, not this
-tag. Items moved to 0.10.4 by name are marked below.
+This source candidate is not the final 0.10.3 tag. There is no
+`0.10.3-beta.2`: the next release is the full 0.10.3, and its final tag waits
+for the full scope list. Codex App Server v2 is paused and is not part of
+0.10.3; the legacy JSON-RPC dialect is not retired in this release. The coarse
+Engine split and DSH all-33 compatibility stay in 0.10.3, and none of this
+work is declared complete here. Items moved to 0.10.4 by name are marked below.

 - **Terminal lifetime (0.10.3 work item):** deleting a conversation now ends the
  terminal sessions and background jobs owned by that Runtime thread. The
@@ -584,7 +641,7 @@ tag. Items moved to 0.10.4 by name are marked below.
 - **Listing installed agent CLIs no longer blocks the runtime.** `GET /v1/agents/external` looks for each binary with `tokio::fs` instead of synchronous file calls on a runtime worker.
 - **A failed custom-provider switch leaves the provider you were on.** When saving a custom provider succeeds but switching to it fails (its identity cannot be resolved, or the engine refuses the route), the next request keeps going to the provider the footer shows instead of the half-configured one.
 - **A zero page size over stdio still advances.** `thread/loaded/list` on the App Server's stdio transport treats a requested limit of `0` as `1`, so a client that sends `0` reaches the next page. `GET /v1/threads` is unchanged.
- **Anthropic and Messages-compatible routes accept any tool name.** Tool names that Anthropic's pattern rejects, such as `web.run` from a loaded tool group, are encoded on the wire and decoded in replies, as the chat and responses routes already did. Before, one such name made every request fail with "tools.N.custom.name: String should match pattern", which stopped sub-agents that had loaded it.
+- **Anthropic and Messages-compatible routes accept any tool name.** Tool names that Anthropic's pattern rejects, such as `web.run` from a loaded tool group, are encoded on the wire and decoded in replies, as the chat and responses routes already did, including when such a tool is forced through an object-form `tool_choice`. Before, one such name made every request fail with "tools.N.custom.name: String should match pattern", which stopped sub-agents that had loaded it ([#7252](https://github.com/codewhale-hq/Codewhale/issues/7252)). Thanks [@ychu824](https://github.com/ychu824) for the report.
 - **A large sub-agent fan-out no longer exhausts the usage journal.** The per-session limit of live usage receipts rises from 64 to 256, above the workflow ceiling of 128, so a full fan-out keeps its cost receipts instead of running with cost unknown.
 - **A turn that stalls before it starts is now bounded.** The stall watchdog covers the setup before the first model request, so a wedged start is logged, cancelled after 180 seconds with a stated reason, and leaves a stall record instead of waiting silently. A warning names the case where all four blocking-work slots are held. Refs #6184.
 - **One unreadable saved session no longer empties the recent-sessions list.** The launch card and ACP `session/list` show the readable sessions and log the failure. Refs #7095.
@@ -1056,6 +1113,7 @@ tag. Items moved to 0.10.4 by name are marked below.
 - **[@Statter](https://github.com/Statter)** — reported black-on-black text on terminals that do not report their background ([#7043](https://github.com/codewhale-hq/Codewhale/issues/7043)).
 - **[@eugenicum](https://github.com/eugenicum)** — asked for a visible Full Access flag for `serve --acp` ([#6992](https://github.com/codewhale-hq/Codewhale/issues/6992)).
 - **[@luestr](https://github.com/luestr)** — reported file and conversation rollback diverging ([#6970](https://github.com/codewhale-hq/Codewhale/issues/6970)), the Linux multiline send key ([#7093](https://github.com/codewhale-hq/Codewhale/issues/7093)) and session export guidance ([#6996](https://github.com/codewhale-hq/Codewhale/issues/6996)).
+- **[@ychu824](https://github.com/ychu824)** — reported every Anthropic request failing with a 400 once `tool_search` added a tool whose name contains a dot, such as `web.run` ([#7252](https://github.com/codewhale-hq/Codewhale/issues/7252)).

 ## [0.10.2] - 2026-10-22

@@ -19,6 +19,48 @@ dependencies = [
 "cpufeatures 0.2.17",
 ]

+[[package]]
+name = "agent-client-protocol"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32339d83e679c8092ec69d2f18e84448f4acf09b46a753e48f3e9265f920acb1"
+dependencies = [
+ "agent-client-protocol-derive",
+ "agent-client-protocol-schema",
+ "anyhow",
+ "futures",
+ "futures-concurrency",
+ "rustc-hash",
+ "serde",
+ "serde_json",
+ "tracing",
+ "uuid",
+]
+
+[[package]]
+name = "agent-client-protocol-derive"
+version = "5.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05a39fd0d81daab854d25144e82e31006b87c554818beb695f0edb576e9c54c4"
+dependencies = [
+ "quote",
+ "syn 3.0.9",
+]
+
+[[package]]
+name = "agent-client-protocol-schema"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fd595be39fc4f9c8170872e5d10d81b44cb6dca44bcc66daba0d34412d4237d"
+dependencies = [
+ "anyhow",
+ "derive_more",
+ "serde",
+ "serde_json",
+ "serde_with",
+ "strum",
+]
+
 [[package]]
 name = "ahash"
 version = "0.8.12"
@@ -601,6 +643,15 @@ dependencies = [
 "syn 3.0.9",
 ]

+[[package]]
+name = "bs58"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf88ba1141d185c399bee5288d850d63b8369520c1eafc32a0430b5b6c287bf4"
+dependencies = [
+ "tinyvec",
+]
+
 [[package]]
 name = "bstr"
 version = "1.13.0"
@@ -882,6 +933,8 @@ dependencies = [
 name = "codewhale-app-server"
 version = "0.10.3"
 dependencies = [
+ "agent-client-protocol",
+ "agent-client-protocol-schema",
 "anyhow",
 "async-stream",
 "async-trait",
@@ -966,7 +1019,7 @@ version = "0.10.3"
 dependencies = [
 "chrono",
 "jsonschema",
- "schemars",
+ "schemars 1.2.2",
 "serde",
 "serde_json",
 ]
@@ -1070,7 +1123,7 @@ dependencies = [
 "libc",
 "ring",
 "rust_decimal",
- "schemars",
+ "schemars 1.2.2",
 "semver",
 "serde",
 "serde_json",
@@ -1123,6 +1176,8 @@ dependencies = [
 name = "codewhale-engine"
 version = "0.10.3"
 dependencies = [
+ "agent-client-protocol",
+ "agent-client-protocol-schema",
 "anyhow",
 "arboard",
 "async-stream",
@@ -1194,7 +1249,7 @@ dependencies = [
 "rmcp",
 "rusqlite",
 "rustls",
- "schemars",
+ "schemars 1.2.2",
 "serde",
 "serde_json",
 "sha2 0.11.1",
@@ -1830,7 +1885,7 @@ dependencies = [
 "rquickjs",
 "rusqlite",
 "rustls",
- "schemars",
+ "schemars 1.2.2",
 "semver",
 "serde",
 "serde_json",
@@ -1944,7 +1999,7 @@ version = "3.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "faf9468729b8cbcea668e36183cb69d317348c2e08e994829fb56ebfdfbaac34"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]

 [[package]]
@@ -2389,6 +2444,9 @@ name = "deranged"
 version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7cd812cc2bc1d69d4764bd80df88b4317eaef9e773c75226407d9bc0876b211c"
+dependencies = [
+ "serde_core",
+]

 [[package]]
 name = "derive_more"
@@ -2468,7 +2526,7 @@ dependencies = [
 "libc",
 "option-ext",
 "redox_users",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]

 [[package]]
@@ -2609,7 +2667,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
 "libc",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]

 [[package]]
@@ -2712,7 +2770,7 @@ checksum = "0ce92ff622d6dadf7349484f42c93271a0d49b7cc4d466a936405bacbe10aa78"
 dependencies = [
 "cfg-if",
 "rustix",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]

 [[package]]
@@ -2859,6 +2917,19 @@ dependencies = [
 "futures-sink",
 ]

+[[package]]
+name = "futures-concurrency"
+version = "7.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "175cd8cca9e1d45b87f18ffa75088f2099e3c4fe5e2f83e42de112560bea8ea6"
+dependencies = [
+ "fixedbitset 0.5.7",
+ "futures-core",
+ "futures-lite",
+ "pin-project",
+ "smallvec",
+]
+
 [[package]]
 name = "futures-core"
 version = "0.3.34"
@@ -3723,7 +3794,7 @@ dependencies = [
 "futures-core",
 "futures-sink",
 "http",
- "indexmap",
+ "indexmap 2.14.0",
 "slab",
 "tokio",
 "tokio-util",
@@ -3750,6 +3821,12 @@ dependencies = [
 "byteorder",
 ]

+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
 [[package]]
 name = "hashbrown"
 version = "0.15.5"
@@ -4156,6 +4233,17 @@ dependencies = [
 "quick-error",
 ]

+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+ "serde",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.14.0"
@@ -4905,7 +4993,7 @@ version = "0.50.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]

 [[package]]
@@ -5346,7 +5434,7 @@ checksum = "8701b58ea97060d5e5b155d383a69952a60943f0e6dfe30b04c287beb0b27455"
 dependencies = [
 "fixedbitset 0.5.7",
 "hashbrown 0.15.5",
- "indexmap",
+ "indexmap 2.14.0",
 ]

 [[package]]
@@ -6078,13 +6166,13 @@ dependencies = [
 "async-trait",
 "chrono",
 "futures",
- "indexmap",
+ "indexmap 2.14.0",
 "libc",
 "oauth2",
 "pastey",
 "pin-project-lite",
 "reqwest",
- "schemars",
+ "schemars 1.2.2",
 "serde",
 "serde_json",
 "sha2 0.11.1",
@@ -6126,7 +6214,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0a2ea9adb03b669c933482ff740b683cd36be7cef23891657a8ccb850401d286"
 dependencies = [
 "convert_case 0.12.0",
- "indexmap",
+ "indexmap 2.14.0",
 "proc-macro-crate",
 "proc-macro2",
 "quote",
@@ -6251,15 +6339,15 @@ dependencies = [

 [[package]]
 name = "rustix"
-version = "1.1.4"
+version = "1.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
+checksum = "e5e76742e5294153d4dde1207dbec5bdd81eef6fabdc0d2118babadabfd858aa"
 dependencies = [
 "bitflags 2.13.1",
 "errno",
 "libc",
 "linux-raw-sys",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]

 [[package]]
@@ -6315,7 +6403,7 @@ dependencies = [
 "security-framework 3.7.0",
 "security-framework-sys",
 "webpki-root-certs",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]

 [[package]]
@@ -6384,6 +6472,18 @@ dependencies = [
 "windows-sys 0.61.2",
 ]

+[[package]]
+name = "schemars"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cd191f9397d57d581cddd31014772520aa448f65ef991055d7f61582c65165f"
+dependencies = [
+ "dyn-clone",
+ "ref-cast",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "schemars"
 version = "1.2.2"
@@ -6553,7 +6653,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e7e9cc8b1b85264074fbcc02a88680c4096b1e47df8f739dceb03bf482f04bd6"
 dependencies = [
 "foldhash 0.2.0",
- "indexmap",
+ "indexmap 2.14.0",
 "itoa",
 "memchr",
 "serde",
@@ -6613,6 +6713,39 @@ dependencies = [
 "serde",
 ]

+[[package]]
+name = "serde_with"
+version = "3.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df9adc193c780ef8f159aee8b61e2d5801aaa555e6eb0947fe45530ec506296f"
+dependencies = [
+ "base64 0.23.1",
+ "bs58",
+ "chrono",
+ "hex",
+ "indexmap 1.9.3",
+ "indexmap 2.14.0",
+ "jiff",
+ "schemars 0.9.0",
+ "schemars 1.2.2",
+ "serde_core",
+ "serde_json",
+ "serde_with_macros",
+ "time",
+]
+
+[[package]]
+name = "serde_with_macros"
+version = "3.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e17bbc68e28663bbbb90df47e058aa7eda4fb445b89fe70457bb94fbccf6e49"
+dependencies = [
+ "darling",
+ "proc-macro2",
+ "quote",
+ "syn 3.0.9",
+]
+
 [[package]]
 name = "serial2"
 version = "0.2.38"
@@ -7080,7 +7213,7 @@ dependencies = [
 "getrandom 0.3.4",
 "once_cell",
 "rustix",
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]

 [[package]]
@@ -7112,7 +7245,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "230a1b821ccbd75b185820a1f1ff7b14d21da1e442e22c0863ea5f08771a8874"
 dependencies = [
 "rustix",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]

 [[package]]
@@ -7265,6 +7398,7 @@ dependencies = [
 "powerfmt",
 "serde_core",
 "time-core",
+ "time-macros",
 ]

 [[package]]
@@ -7273,6 +7407,16 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e1c906769ad99c88eaa54e728060edef082f8e358ff32030cb7c7d315e81109"

+[[package]]
+name = "time-macros"
+version = "0.2.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e689342a48d2ea927c87ea50cabf8594854bf940e9310208848d680d668ed85"
+dependencies = [
+ "num-conv",
+ "time-core",
+]
+
 [[package]]
 name = "tiny_http"
 version = "0.12.0"
@@ -7414,7 +7558,7 @@ version = "1.1.6+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "920602543f0911ab71da12c50d59701da54c196d1a2bf5cb4b75667f137a406a"
 dependencies = [
- "indexmap",
+ "indexmap 2.14.0",
 "serde_core",
 "serde_spanned 1.1.1",
 "toml_datetime 1.1.1+spec-1.1.0",
@@ -7447,7 +7591,7 @@ version = "0.22.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
 dependencies = [
- "indexmap",
+ "indexmap 2.14.0",
 "serde",
 "serde_spanned 0.6.9",
 "toml_datetime 0.6.11",
@@ -7461,7 +7605,7 @@ version = "0.25.15+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1340ea94a5856333492c9064b02c778b191dd2c853778d9609debdcdfea3a614"
 dependencies = [
- "indexmap",
+ "indexmap 2.14.0",
 "toml_datetime 1.1.1+spec-1.1.0",
 "toml_parser",
 "toml_writer",
@@ -8220,7 +8364,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.52.0",
 ]

 [[package]]
@@ -73,6 +73,8 @@ repository = "https://github.com/codewhale-hq/CodeWhale"
 warnings = "deny"

 [workspace.dependencies]
+agent-client-protocol = { version = "=5.2.0", default-features = false }
+agent-client-protocol-schema = { version = "=1.17.0", default-features = false }
 anyhow = "1.0.100"
 async-trait = "0.1.89"
 axum = { version = "0.8.5", features = ["json", "ws"] }
@@ -164,6 +164,44 @@ The host bundle's own copy of these notices is `dist/LICENSES.txt`, generated
 from the bundler's metafile; Codewhale writes it beside the bundle it
 materialises (`~/.codewhale/extension-host/<sha256>/LICENSES.txt`).

+## DeepSeek Harness Creator files (`dsh-agent-preset` skills, `dsh-plugin-manager`, `dsh-tool-cordis`, `dsh-sandbox`) — MIT
+
+Codewhale ships, unmodified, the four authoring skills of
+`@deepseek-ai/dsh-agent-preset` 0.2.2-rc.1
+(`crates/skills/assets/dsh-creator/`), and keeps byte-for-byte copies of
+`@deepseek-ai/dsh-plugin-manager` 0.2.2-rc.1 `lib/types/tools.js` and
+`@deepseek-ai/dsh-tool-cordis` 0.2.2-rc.1 `lib/index.js`
+(`crates/engine/extension-host/src/dsh/upstream/creator/`).
+`@deepseek-ai/dsh-sandbox` 0.2.2-rc.1 is named for the approval excerpt that
+slice will add. Each package is published under the licence text below, and
+each pin's `UPSTREAM.json` records the SHA-256 of every file.
+
+Upstream: <https://github.com/deepseek-ai/deepseek-harness>
+
+```
+MIT License
+
+Copyright (c) 2026 DeepSeek
+
+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.
+```
+
 ## Model Context Protocol SDK and bundled dependencies

 The pinned builtin MCP bundle (`crates/engine/extension-host/dist/builtin/mcp.mjs`)
@@ -924,7 +924,7 @@ base_url = "https://api.deepseek.com/beta"
 # (https://bailian.console.aliyun.com/)
 #
 # Token Plan Personal and Team share the same AP-Southeast (Singapore) endpoint.
-# Available text/coding models: qwen3.8-max, qwen3.8-max-preview, qwen3.7-plus,
+# Available text/coding models: qwen3.8-max, qwen4-max-preview, qwen3.7-plus,
 # qwen3.7-max, qwen3.6-flash, deepseek-v4-pro, deepseek-v4-flash-0731, glm-5.2
 #
 # Provider aliases: modelstudio-token-plan, modelstudio_token_plan,
@@ -944,7 +944,8 @@ base_url = "https://api.deepseek.com/beta"
 # (https://bailian.console.aliyun.com/)
 #
 # Coding Plan uses a separate international endpoint (coding-intl.dashscope).
-# Same model catalog as the Token Plan.
+# Same model ids as the Token Plan except qwen4-max-preview, which is
+# Token Plan only.
 #
 # Provider aliases: modelstudio-coding-plan, modelstudio_coding_plan,
 #                   alibaba-coding-plan, dashscope-coding-plan
@@ -391,6 +391,11 @@
          "type": "boolean",
          "default": false
        },
+        "thread_fleet_member_durable_operations_v1": {
+          "type": "boolean",
+          "description": "Member starts are durable per `(store, thread, operation_key)`;\n`GET /v1/threads/{id}/members/operations/{operation_key}` reads them.",
+          "default": false
+        },
        "fleet_run_start": {
          "type": "boolean",
          "default": false
@@ -482,6 +487,7 @@
        "worker_runtime",
        "fleet_run_create",
        "thread_fleet_members",
+        "thread_fleet_member_durable_operations_v1",
        "fleet_run_start",
        "fleet_event_replay",
        "fleet_event_stream",
@@ -86,6 +86,7 @@ export type RuntimeCapabilities = {
  worker_runtime: boolean
  fleet_run_create: boolean
  thread_fleet_members: boolean
+  thread_fleet_member_durable_operations_v1: boolean
  fleet_run_start: boolean
  fleet_event_replay: boolean
  fleet_event_stream: boolean
@@ -173,6 +173,10 @@ pub struct RuntimeCapabilities {
    pub fleet_run_create: bool,
    #[serde(default)]
    pub thread_fleet_members: bool,
+    /// Member starts are durable per `(store, thread, operation_key)`;
+    /// `GET /v1/threads/{id}/members/operations/{operation_key}` reads them.
+    #[serde(default)]
+    pub thread_fleet_member_durable_operations_v1: bool,
    #[serde(default)]
    pub fleet_run_start: bool,
    #[serde(default)]
@@ -550,6 +554,7 @@ mod tests {
            worker_runtime: false,
            fleet_run_create: true,
            thread_fleet_members: true,
+            thread_fleet_member_durable_operations_v1: true,
            fleet_run_start: true,
            fleet_event_replay: true,
            fleet_event_stream: true,
@@ -26,6 +26,7 @@ default = []
 test-support = ["codewhale-engine/test-support"]

 [dependencies]
+agent-client-protocol.workspace = true
 codewhale-account-cli = { path = "../account-cli", version = "0.10.3" }
 codewhale-app-server-protocol = { path = "../app-server-protocol", version = "0.10.3" }
 anyhow.workspace = true
@@ -94,6 +95,7 @@ urlencoding = "2.1"
 webbrowser = "1.0"

 [dev-dependencies]
+agent-client-protocol-schema.workspace = true
 rusqlite.workspace = true
 tempfile.workspace = true
 tower = "0.5"
@@ -0,0 +1,441 @@
+use super::*;
+use agent_client_protocol::v1::{ConnectionTo, Responder};
+use agent_client_protocol::{Agent, Client, Lines, UntypedMessage};
+use codewhale_util::bounded_lines::{BoundedLines, FrameRefusal, MAX_FRAME_BYTES};
+use futures_util::{Sink, Stream};
+use std::io;
+use std::sync::{MutexGuard, PoisonError};
+use tokio::sync::{Notify, mpsc};
+
+const PROMPT_BUSY: &str = "a session/prompt turn is already in progress";
+const OUTGOING_QUEUE_FRAMES: usize = 256;
+const OVERSIZE_RESPONSE: &str =
+    "ACP response exceeds the 8 MiB transport limit; inspect canonical state without replay";
+type Cx = ConnectionTo<Client>;
+
+pub(super) struct Shared {
+    server: tokio::sync::Mutex<AcpServer>,
+    prompt: std::sync::Mutex<Option<mpsc::UnboundedSender<Inbound>>>,
+    idle: Notify,
+    ending: Notify,
+    failure: std::sync::Mutex<Option<anyhow::Error>>,
+}
+
+struct PromptGuard(Arc<Shared>);
+
+impl Drop for PromptGuard {
+    fn drop(&mut self) {
+        self.0.release();
+    }
+}
+
+impl PromptGuard {
+    fn finish(self, responder: Responder<Value>, result: std::result::Result<Value, SdkError>) {
+        let mut slot = self.0.slot();
+        let _ = responder.respond_with_result(result);
+        *slot = None;
+        drop(slot);
+        self.0.idle.notify_waiters();
+    }
+}
+
+impl Shared {
+    pub(super) fn new(server: AcpServer) -> Self {
+        Self {
+            server: tokio::sync::Mutex::new(server),
+            prompt: std::sync::Mutex::new(None),
+            idle: Notify::new(),
+            ending: Notify::new(),
+            failure: std::sync::Mutex::new(None),
+        }
+    }
+
+    pub(super) fn fail(&self, error: anyhow::Error) {
+        self.failure
+            .lock()
+            .unwrap_or_else(PoisonError::into_inner)
+            .get_or_insert(error);
+        self.tell_prompt(Inbound::Eof);
+        self.ending.notify_one();
+    }
+
+    pub(super) fn take_failure(&self) -> Option<anyhow::Error> {
+        self.failure
+            .lock()
+            .unwrap_or_else(PoisonError::into_inner)
+            .take()
+    }
+
+    #[cfg(test)]
+    pub(super) fn into_server(self) -> AcpServer {
+        self.server.into_inner()
+    }
+
+    fn slot(&self) -> MutexGuard<'_, Option<mpsc::UnboundedSender<Inbound>>> {
+        self.prompt.lock().unwrap_or_else(PoisonError::into_inner)
+    }
+
+    fn prompt_active(&self) -> bool {
+        self.slot().is_some()
+    }
+
+    fn tell_prompt(&self, message: Inbound) {
+        if let Some(inbox) = self.slot().as_ref() {
+            let _ = inbox.send(message);
+        }
+    }
+
+    fn release(&self) {
+        *self.slot() = None;
+        self.idle.notify_waiters();
+    }
+
+    async fn wait_idle(&self) {
+        loop {
+            let notified = self.idle.notified();
+            if !self.prompt_active() {
+                return;
+            }
+            notified.await;
+        }
+    }
+
+    fn cancel(&self, params: &Value) {
+        if let Some(session) = params.get("sessionId").and_then(Value::as_str) {
+            self.tell_prompt(Inbound::Cancel {
+                session: session.to_string(),
+            });
+        }
+    }
+
+    async fn request(
+        self: &Arc<Self>,
+        method: String,
+        params: Value,
+        responder: Responder<Value>,
+        cx: Cx,
+    ) {
+        match method.as_str() {
+            "session/cancel" => {
+                self.cancel(&params);
+                let _ = responder.respond(Value::Null);
+            }
+            "session/prompt" => self.start_prompt(params, responder, cx).await,
+            _ if self.prompt_active() => self.during_prompt(&cx, method, params, responder),
+            "shutdown" => {
+                let _ = responder.respond(Value::Null);
+                self.ending.notify_one();
+            }
+            "session/load" => self.load(params, responder, cx).await,
+            _ => {
+                let result = self
+                    .server
+                    .lock()
+                    .await
+                    .handle_request(&method, params)
+                    .await;
+                let _ = responder.respond_with_result(result);
+            }
+        }
+    }
+
+    fn during_prompt(
+        self: &Arc<Self>,
+        cx: &Cx,
+        method: String,
+        params: Value,
+        responder: Responder<Value>,
+    ) {
+        let served = matches!(
+            method.as_str(),
+            "session/list"
+                | "session/set_config_option"
+                | "session/set_mode"
+                | "session/set_model"
+                | "session/listProviders"
+                | "session/currentModel"
+                | "session/selectModel"
+        );
+        if !served {
+            let error = if matches!(
+                method.as_str(),
+                "initialize" | "session/new" | "session/load" | "shutdown"
+            ) {
+                SdkError::new(-32603, PROMPT_BUSY)
+            } else {
+                SdkError::method_not_found().data(Value::String(method))
+            };
+            let _ = responder.respond_with_error(error);
+            return;
+        }
+        let shared = Arc::clone(self);
+        let _ = cx.spawn(async move {
+            let result = shared
+                .server
+                .lock()
+                .await
+                .handle_request(&method, params)
+                .await;
+            let _ = responder.respond_with_result(result);
+            Ok(())
+        });
+    }
+
+    async fn load(&self, params: Value, responder: Responder<Value>, cx: Cx) {
+        let mut server = self.server.lock().await;
+        let result = async {
+            let loaded = server.load_session(params).await.map_err(SdkError::from)?;
+            if let Some(session) = loaded.get("sessionId").and_then(Value::as_str) {
+                let updates = server
+                    .history_updates(session)
+                    .await
+                    .map_err(|error| SdkError::new(-32603, error.to_string()))?;
+                for update in updates {
+                    cx.send_notification(acp::SessionNotification::new(
+                        session.to_string(),
+                        update,
+                    ))?;
+                }
+            }
+            Ok::<_, SdkError>(loaded)
+        }
+        .await;
+        drop(server);
+        let _ = responder.respond_with_result(result);
+    }
+
+    async fn start_prompt(self: &Arc<Self>, params: Value, responder: Responder<Value>, cx: Cx) {
+        if self.prompt_active() {
+            let _ = responder.respond_with_error(SdkError::new(-32603, PROMPT_BUSY));
+            return;
+        }
+        let admitted = {
+            let server = self.server.lock().await;
+            server.validate_prompt(&params).map(|(session, prompt)| {
+                let thread = server.sessions[&session].thread_id.clone();
+                (session, thread, prompt, server.prompt_run())
+            })
+        };
+        let (session, thread, prompt, run) = match admitted {
+            Ok(admitted) => admitted,
+            Err(error) => {
+                let _ = responder.respond_with_error(error.into());
+                return;
+            }
+        };
+        let (answers, mut inbox) = mpsc::unbounded_channel();
+        *self.slot() = Some(answers.clone());
+        let guard = PromptGuard(Arc::clone(self));
+        let task_cx = cx.clone();
+        let _ = cx.spawn(async move {
+            let result = {
+                let mut emit = |outgoing: Outgoing| -> Result<()> {
+                    match outgoing {
+                        Outgoing::Update(notification) => task_cx
+                            .send_notification(notification)
+                            .map_err(|error| anyhow!("ACP update was not sent: {}", error.message)),
+                        Outgoing::Permission { key, request } => {
+                            let answers = answers.clone();
+                            task_cx
+                                .send_request(request)
+                                .on_receiving_result(async move |reply| {
+                                    let gone = matches!(
+                                        &reply,
+                                        Err(error)
+                                            if agent_client_protocol::is_incoming_transport_closed(error)
+                                                || agent_client_protocol::is_connection_terminated(error)
+                                    );
+                                    if !gone {
+                                        let _ = answers.send(Inbound::Permission {
+                                            key,
+                                            allow: permission_allowed(&reply),
+                                        });
+                                    }
+                                    Ok(())
+                                })
+                                .map_err(|error| {
+                                    anyhow!("ACP permission request was not sent: {}", error.message)
+                                })
+                        }
+                    }
+                };
+                run.drive_prompt(&session, &thread, prompt, &mut emit, &mut inbox)
+                    .await
+            };
+            let result = match result {
+                Ok(stop) => to_wire(&acp::PromptResponse::new(stop)).map_err(SdkError::from),
+                Err(error) => Err(SdkError::new(
+                    -32603,
+                    codewhale_engine::client::redact_model_bound_text(&error.to_string(), &[]),
+                )),
+            };
+            guard.finish(responder, result);
+            Ok(())
+        });
+    }
+}
+
+fn permission_allowed(
+    reply: &std::result::Result<acp::RequestPermissionResponse, SdkError>,
+) -> bool {
+    matches!(
+        reply,
+        Ok(response) if matches!(
+            &response.outcome,
+            acp::RequestPermissionOutcome::Selected(selected)
+                if &*selected.option_id.0 == "allow-once"
+        )
+    )
+}
+
+fn closes_input(line: &str) -> bool {
+    line.len() <= 256
+        && line.contains("daemon/input_closed")
+        && serde_json::from_str::<Value>(line)
+            .is_ok_and(|message| crate::is_control_input_closed(&message))
+}
+
+fn incoming_lines(
+    input: Box<dyn AsyncBufRead + Send + Unpin>,
+    shared: Arc<Shared>,
+) -> impl Stream<Item = io::Result<String>> + Send + 'static {
+    futures_util::stream::unfold(
+        (BoundedLines::new(input), shared),
+        |(mut lines, shared)| async move {
+            loop {
+                match lines.next_line().await {
+                    Ok(Some(line)) if line.trim().is_empty() => continue,
+                    Ok(Some(line)) if closes_input(&line) => return None,
+                    Ok(Some(line)) => return Some((Ok(line), (lines, shared))),
+                    Ok(None) => return None,
+                    Err(error) if crate::stdio::is_frame_refusal(&error) => {
+                        return Some((Ok(error.to_string()), (lines, shared)));
+                    }
+                    Err(error) => {
+                        shared.fail(anyhow!("ACP input failed: {error}"));
+                        return None;
+                    }
+                }
+            }
+        },
+    )
+}
+
+pub(super) fn bound_outgoing(line: String) -> io::Result<String> {
+    if line.len() <= MAX_FRAME_BYTES {
+        return Ok(line);
+    }
+    let refused = || io::Error::new(io::ErrorKind::InvalidData, FrameRefusal::TooLarge);
+    let Ok(Value::Object(frame)) = serde_json::from_str::<Value>(&line) else {
+        return Err(refused());
+    };
+    if frame.contains_key("method") || !frame.contains_key("id") {
+        return Err(refused());
+    }
+    let failure = |id: Value| {
+        json!({"jsonrpc":"2.0","id":id,"error":{"code":-32603,"message":OVERSIZE_RESPONSE}})
+            .to_string()
+    };
+    let replaced = failure(frame["id"].clone());
+    Ok(if replaced.len() <= MAX_FRAME_BYTES {
+        replaced
+    } else {
+        failure(Value::Null)
+    })
+}
+
+pub(super) fn outgoing_lines(
+    frames: mpsc::Sender<String>,
+    shared: Arc<Shared>,
+) -> impl Sink<String, Error = io::Error> + Send + 'static {
+    futures_util::sink::unfold(
+        (frames, shared),
+        |(frames, shared), line: String| async move {
+            let line = match bound_outgoing(line) {
+                Ok(line) => line,
+                Err(error) => {
+                    shared.fail(anyhow!("ACP output refused: {error}"));
+                    return Ok((frames, shared));
+                }
+            };
+            frames
+                .send(line)
+                .await
+                .map_err(|_| io::Error::new(io::ErrorKind::BrokenPipe, "ACP output closed"))?;
+            Ok::<_, io::Error>((frames, shared))
+        },
+    )
+}
+
+pub(super) async fn serve_connection<'a>(
+    server: AcpServer,
+    input: Box<dyn AsyncBufRead + Send + Unpin>,
+    mut output: Box<dyn AsyncWrite + Send + Unpin + 'a>,
+) -> Result<Arc<Shared>> {
+    let shared = Arc::new(Shared::new(server));
+    let (frames, mut queued) = mpsc::channel::<String>(OUTGOING_QUEUE_FRAMES);
+    let transport = Lines::new(
+        outgoing_lines(frames, Arc::clone(&shared)),
+        incoming_lines(input, Arc::clone(&shared)),
+    );
+    let requests = Arc::clone(&shared);
+    let notifications = Arc::clone(&shared);
+    let finishing = Arc::clone(&shared);
+    let connection = Agent
+        .v1()
+        .on_receive_request(
+            async move |request: UntypedMessage, responder, cx| {
+                let (method, params) = request.into_parts();
+                requests.request(method, params, responder, cx).await;
+                Ok(())
+            },
+            agent_client_protocol::on_receive_request!(),
+        )
+        .on_receive_notification(
+            async move |notification: UntypedMessage, _cx| {
+                let (method, params) = notification.into_parts();
+                if method == "session/cancel" {
+                    notifications.cancel(&params);
+                }
+                Ok(())
+            },
+            agent_client_protocol::on_receive_notification!(),
+        )
+        .connect_with(transport, async move |cx| {
+            tokio::select! {
+                () = cx.incoming_closed() => {}
+                () = finishing.ending.notified() => {}
+            }
+            finishing.tell_prompt(Inbound::Eof);
+            finishing.wait_idle().await;
+            Ok(())
+        });
+    let connection = async {
+        match connection.await {
+            Err(error) if agent_client_protocol::is_incoming_transport_closed(&error) => Ok(()),
+            other => other.map_err(|error| anyhow!("ACP connection failed: {}", error.message)),
+        }
+    };
+    let failing = Arc::clone(&shared);
+    let pump = async {
+        let mut broken = false;
+        while let Some(frame) = queued.recv().await {
+            if broken {
+                continue;
+            }
+            if let Err(error) =
+                crate::stdio::write_control_line(&mut output, frame.as_bytes()).await
+            {
+                broken = true;
+                failing.fail(error);
+            }
+        }
+    };
+    let (ended, ()) = tokio::join!(connection, pump);
+    drop(failing);
+    if let Some(error) = shared.take_failure() {
+        return Err(error);
+    }
+    ended?;
+    Ok(shared)
+}
@@ -5,12 +5,17 @@ use codewhale_engine::runtime_threads::{
    manager::ExternalApprovalDecision, manager::StartTurnRequest,
 };
 use std::time::Duration;
+use tokio::sync::mpsc::UnboundedReceiver;
 struct Permission {
    thread_id: String,
    turn_id: String,
    approval_id: String,
    execution_id: String,
 }
+pub(super) struct PromptRun {
+    pub(super) runtime: Arc<RuntimeThreadManager>,
+    pub(super) sessions_dir: PathBuf,
+}
 struct Projection<'a> {
    session: &'a str,
    thread: &'a str,
@@ -42,21 +47,20 @@ impl Drop for TurnClaim {
        }
    }
 }
-impl AcpServer {
-    pub(super) async fn drive_prompt<R: AsyncBufRead + Unpin, W: AsyncWrite + Unpin>(
-        &mut self,
-        params: Value,
-        reader: &mut crate::stdio::BoundedLines<R>,
-        writer: &mut W,
-    ) -> Result<&'static str> {
-        let (session_id, prompt) = self
-            .validate_prompt(&params)
-            .map_err(|error| anyhow!(error.message))?;
-        let binding = self
-            .sessions
-            .get(&session_id)
-            .ok_or_else(|| anyhow!("unknown sessionId"))?;
-        let thread_id = binding.thread_id.clone();
+fn update(session: &str, update: acp::SessionUpdate) -> Outgoing {
+    Outgoing::Update(acp::SessionNotification::new(session.to_string(), update))
+}
+impl PromptRun {
+    pub(super) async fn drive_prompt(
+        &self,
+        session_id: &str,
+        thread_id: &str,
+        prompt: String,
+        emit: Emit<'_>,
+        inbox: &mut UnboundedReceiver<Inbound>,
+    ) -> Result<acp::StopReason> {
+        let session_id = session_id.to_string();
+        let thread_id = thread_id.to_string();
        // Subscribe before snapshot/admission; replay deduplicates by seq.
        let mut receiver = self.runtime.subscribe_events();
        let cursor = self.runtime.get_thread_detail(&thread_id).await?.latest_seq;
@@ -86,7 +90,7 @@ impl AcpServer {
            permissions: HashMap::new(),
        };
        let terminal = match self
-            .project_turn(&mut projection, &mut receiver, reader, writer)
+            .project_turn(&mut projection, &mut receiver, inbox, emit)
            .await
        {
            Ok(terminal) => terminal,
@@ -144,9 +148,6 @@ impl AcpServer {
            }
        };
        claim.armed = false;
-        if let Some(binding) = self.sessions.get_mut(&session_id) {
-            binding.cursor = projection.cursor;
-        }
        self.save_checkpoint(&thread_id, &session_id).await?;
        if terminal
            .model_request_diagnostics
@@ -154,11 +155,13 @@ impl AcpServer {
            .and_then(|facts| facts.stop_reason)
            == Some(RuntimeTurnStopReason::StepBudgetExhausted)
        {
-            return Ok("max_turn_requests");
+            return Ok(acp::StopReason::MaxTurnRequests);
        }
        match terminal.status {
-            RuntimeTurnStatus::Completed => Ok("end_turn"),
-            RuntimeTurnStatus::Interrupted | RuntimeTurnStatus::Canceled => Ok("cancelled"),
+            RuntimeTurnStatus::Completed => Ok(acp::StopReason::EndTurn),
+            RuntimeTurnStatus::Interrupted | RuntimeTurnStatus::Canceled => {
+                Ok(acp::StopReason::Cancelled)
+            }
            _ => Err(anyhow!(
                "{}",
                terminal.error.unwrap_or_else(
@@ -209,12 +212,12 @@ impl AcpServer {
        })?;
        Ok(())
    }
-    async fn project_turn<R: AsyncBufRead + Unpin, W: AsyncWrite + Unpin>(
+    async fn project_turn(
        &self,
        projection: &mut Projection<'_>,
        receiver: &mut tokio::sync::broadcast::Receiver<RuntimeEventRecord>,
-        reader: &mut crate::stdio::BoundedLines<R>,
-        writer: &mut W,
+        inbox: &mut UnboundedReceiver<Inbound>,
+        emit: Emit<'_>,
    ) -> Result<TurnRecord> {
        let session = projection.session;
        let thread = projection.thread;
@@ -232,45 +235,26 @@ impl AcpServer {
            }
            tokio::select! {
                () = async { match cancel_deadline { Some(deadline) => tokio::time::sleep_until(deadline).await, None => std::future::pending().await } } => return Err(anyhow!("Core cancellation remains nonterminal; ACP cannot report a fabricated cancelled receipt")),
-                line = reader.next_line(), if !eof => {
-                    let line = match line {
-                        Ok(line) => line,
-                        Err(error) if crate::stdio::is_frame_refusal(&error) => {
-                            write_jsonrpc_error(writer, None, -32700, error.to_string()).await?;
-                            continue;
+                message = inbox.recv(), if !eof => {
+                    match message {
+                        Some(Inbound::Cancel { session: cancelled_session }) => {
+                            if cancelled_session == session {
+                                cancelled = true; projection.permissions.clear(); self.interrupt_claimed_turn(thread, turn).await?;
+                                cancel_deadline.get_or_insert(tokio::time::Instant::now() + Duration::from_secs(30));
+                            }
                        }
-                        Err(error) => return Err(error.into()),
-                    };
-                    let Some(line) = line else {
-                        eof = true; cancelled = true; projection.permissions.clear(); self.interrupt_claimed_turn(thread, turn).await?;
-                        cancel_deadline = Some(tokio::time::Instant::now() + Duration::from_secs(30)); continue;
-                    };
-                    if line.trim().is_empty() { continue; }
-                    let message: Value = match serde_json::from_str(&line) {
-                        Ok(message) => message,
-                        Err(error) => { write_jsonrpc_error(writer, None, -32700, format!("invalid json: {error}")).await?; continue; }
-                    };
-                    if crate::is_control_input_closed(&message) {
-                        eof=true; cancelled=true; projection.permissions.clear();self.interrupt_claimed_turn(thread,turn).await?;
-                        cancel_deadline.get_or_insert(tokio::time::Instant::now()+Duration::from_secs(30));continue;
-                    }
-                    let response_id = message.get("id").cloned().map(|id| self.response_id_policy.response_id(id));
-                    if message.get("jsonrpc").and_then(Value::as_str) != Some("2.0") { write_jsonrpc_error(writer, response_id, -32600, "jsonrpc version must be 2.0").await?; continue; }
-                    if is_jsonrpc_response(&message) {
-                        if !cancelled && let Some(id) = message.get("id").and_then(Value::as_str) && let Some(permission) = projection.permissions.remove(id) { self.answer_permission(&permission, &message).await?; }
-                        continue;
-                    }
-                    if message.get("method").and_then(Value::as_str) == Some("session/cancel") {
-                        if message.pointer("/params/sessionId").and_then(Value::as_str) == Some(session) {
-                            cancelled = true; projection.permissions.clear(); self.interrupt_claimed_turn(thread, turn).await?;
+                        Some(Inbound::Permission { key, allow }) => {
+                            if !cancelled && let Some(permission) = projection.permissions.remove(&key) { self.answer_permission(&permission, allow).await?; }
+                        }
+                        Some(Inbound::Eof) | None => {
+                            eof = true; cancelled = true; projection.permissions.clear(); self.interrupt_claimed_turn(thread, turn).await?;
                            cancel_deadline.get_or_insert(tokio::time::Instant::now() + Duration::from_secs(30));
                        }
-                        if let Some(id) = response_id { write_jsonrpc_result(writer, id, json!(null)).await?; }
-                    } else if let Some(id) = response_id { write_jsonrpc_error(writer, Some(id), -32603, "a session/prompt turn is already in progress").await?; }
+                    }
                }
                record = async { replay_batch.pop_front().expect("nonempty bounded replay batch") }, if !replay_batch.is_empty() => {
                    projection.emit = !cancelled && !eof;
-                    if let Some(done) = self.project_event(projection, &record, writer).await? { return Ok(done); }
+                    if let Some(done) = self.project_event(projection, &record, &mut *emit).await? { return Ok(done); }
                }
                batch = async { replay.as_mut().expect("active replay").batches.recv().await }, if replay.is_some() && replay_batch.is_empty() => {
                    match batch {
@@ -280,7 +264,7 @@ impl AcpServer {
                }
                event = receiver.recv(), if replay.is_none() && replay_batch.is_empty() => {
                    match event {
-                        Ok(record) => { projection.emit = !cancelled && !eof; if let Some(done) = self.project_event(projection, &record, writer).await? { return Ok(done); } },
+                        Ok(record) => { projection.emit = !cancelled && !eof; if let Some(done) = self.project_event(projection, &record, &mut *emit).await? { return Ok(done); } },
                        Err(tokio::sync::broadcast::error::RecvError::Lagged(_)) => {
                            let captured = self.runtime.replay_events(thread, Some(projection.cursor), None).await?;
                            if captured.base_seq > projection.cursor { return Err(anyhow!("ACP replay no longer covers the cursor; projection is incomplete")); }
@@ -292,7 +276,7 @@ impl AcpServer {
            }
        }
    }
-    async fn answer_permission(&self, permission: &Permission, response: &Value) -> Result<()> {
+    async fn answer_permission(&self, permission: &Permission, allow: bool) -> Result<()> {
        let detail = self
            .runtime
            .get_thread_detail(&permission.thread_id)
@@ -304,15 +288,6 @@ impl AcpServer {
        }) {
            return Ok(());
        }
-        let allow = response.get("error").is_none()
-            && response
-                .pointer("/result/outcome/outcome")
-                .and_then(Value::as_str)
-                == Some("selected")
-            && response
-                .pointer("/result/outcome/optionId")
-                .and_then(Value::as_str)
-                == Some("allow-once");
        self.runtime
            .deliver_approval_from(
                &permission.approval_id,
@@ -327,11 +302,11 @@ impl AcpServer {
            .await?;
        Ok(())
    }
-    async fn project_event<W: AsyncWrite + Unpin>(
+    async fn project_event(
        &self,
        projection: &mut Projection<'_>,
        record: &RuntimeEventRecord,
-        writer: &mut W,
+        out: Emit<'_>,
    ) -> Result<Option<TurnRecord>> {
        let session = projection.session;
        let thread = projection.thread;
@@ -353,7 +328,7 @@ impl AcpServer {
                if emit && p.get("kind").and_then(Value::as_str) == Some("agent_message") =>
            {
                if let Some(text) = p.get("delta").and_then(Value::as_str) {
-                    write_session_update(writer, session, text.to_string()).await?;
+                    out(update(session, agent_text(text.to_string())))?;
                }
            }
            "item.started" => {
@@ -373,7 +348,10 @@ impl AcpServer {
                        input: tool.get("input").cloned().unwrap_or(Value::Null),
                    };
                    if emit {
-                        write_tool_call_start(writer, session, &call).await?;
+                        out(update(
+                            session,
+                            acp::SessionUpdate::ToolCall(tool_call_start(&call)),
+                        ))?;
                    }
                    calls.insert(id, call);
                }
@@ -386,7 +364,15 @@ impl AcpServer {
                let call = calls
                    .get(id)
                    .ok_or_else(|| anyhow!("Dispatch projection lacks its admitted start"))?;
-                write_tool_call_update(writer, session, call, "in_progress", None).await?;
+                out(update(
+                    session,
+                    acp::SessionUpdate::ToolCallUpdate(tool_call_update(
+                        call,
+                        acp::ToolCallStatus::InProgress,
+                        None,
+                        &[],
+                    )),
+                ))?;
            }
            "item.completed" | "item.failed" | "item.interrupted" if emit => {
                if let Some(item) = p.get("item")
@@ -403,19 +389,19 @@ impl AcpServer {
                        .unwrap_or_default();
                    let status = if item.get("status").and_then(Value::as_str) == Some("completed")
                    {
-                        "completed"
+                        acp::ToolCallStatus::Completed
                    } else {
-                        "failed"
+                        acp::ToolCallStatus::Failed
                    };
-                    write_tool_call_update_with_blocks(
-                        writer,
+                    out(update(
                        session,
-                        &call,
-                        status,
-                        item.get("detail").and_then(Value::as_str),
-                        &blocks,
-                    )
-                    .await?;
+                        acp::SessionUpdate::ToolCallUpdate(tool_call_update(
+                            &call,
+                            status,
+                            item.get("detail").and_then(Value::as_str),
+                            &blocks,
+                        )),
+                    ))?;
                }
            }
            "approval.required" if emit => {
@@ -436,11 +422,41 @@ impl AcpServer {
                    let call = calls
                        .get(execution)
                        .ok_or_else(|| anyhow!("Approval projection lacks admitted tool start"))?;
-                    let id = format!(
-                        "codewhale-permission-{}",
-                        NEXT_ACP_PERMISSION_REQUEST_ID.fetch_add(1, Ordering::Relaxed)
+                    let id = uuid::Uuid::new_v4().to_string();
+                    let title = tool_call_title(call);
+                    let text = p
+                        .get("description")
+                        .and_then(Value::as_str)
+                        .filter(|text| !text.trim().is_empty())
+                        .map_or_else(|| title.clone(), str::to_string);
+                    let request = acp::RequestPermissionRequest::new(
+                        session.to_string(),
+                        acp::ToolCallUpdate::new(
+                            execution.to_string(),
+                            acp::ToolCallUpdateFields::new()
+                                .title(title)
+                                .kind(tool_call_kind(call))
+                                .status(acp::ToolCallStatus::Pending)
+                                .raw_input((!call.input.is_null()).then(|| call.input.clone()))
+                                .content(vec![acp::ToolCallContent::from(text)]),
+                        ),
+                        vec![
+                            acp::PermissionOption::new(
+                                "allow-once",
+                                "Allow once",
+                                acp::PermissionOptionKind::AllowOnce,
+                            ),
+                            acp::PermissionOption::new(
+                                "reject-once",
+                                "Reject",
+                                acp::PermissionOptionKind::RejectOnce,
+                            ),
+                        ],
                    );
-                    write_json_line(writer, json!({"jsonrpc":"2.0","id":id,"method":"session/request_permission","params":{"sessionId":session,"toolCall":{"toolCallId":execution,"title":tool_call_title(call),"kind":tool_call_kind(call),"status":"pending","rawInput":call.input,"content":[{"type":"content","content":{"type":"text","text":p.get("description")}}]},"options":[{"optionId":"allow-once","name":"Allow once","kind":"allow_once"},{"optionId":"reject-once","name":"Reject","kind":"reject_once"}]}})).await?;
+                    out(Outgoing::Permission {
+                        key: id.clone(),
+                        request,
+                    })?;
                    permissions.insert(
                        id,
                        Permission {
@@ -489,6 +505,22 @@ impl AcpServer {
 mod tests {
    use super::super::tests::{Rig, fixture_config};
    use super::*;
+    fn frame(outgoing: Outgoing) -> Value {
+        match outgoing {
+            Outgoing::Update(notification) => {
+                json!({"jsonrpc":"2.0","method":"session/update","params":serde_json::to_value(notification).unwrap()})
+            }
+            Outgoing::Permission { key, request } => {
+                json!({"jsonrpc":"2.0","id":key,"method":"session/request_permission","params":serde_json::to_value(request).unwrap()})
+            }
+        }
+    }
+    fn recording(out: &mut Vec<Value>) -> impl FnMut(Outgoing) -> Result<()> + Send + '_ {
+        move |outgoing| {
+            out.push(frame(outgoing));
+            Ok(())
+        }
+    }
    fn event(seq: u64, thread: &str, turn: &str, name: &str, payload: Value) -> RuntimeEventRecord {
        serde_json::from_value(json!({"seq":seq,"timestamp":chrono::Utc::now(),"thread_id":thread,"turn_id":turn,"event":name,"payload":payload})).unwrap()
    }
@@ -606,14 +638,15 @@ mod tests {
                calls: HashMap::new(),
                permissions: HashMap::new(),
            };
-            let mut output = Vec::new();
+            let mut output: Vec<Value> = Vec::new();
            // Project the actual Runtime records, not synthetic ACP frames.
            for record in rig.server.runtime.events_since(&thread, None)? {
                rig.server
-                    .project_event(&mut projection, &record, &mut output)
+                    .prompt_run()
+                    .project_event(&mut projection, &record, &mut recording(&mut output))
                    .await?;
            }
-            let wire = super::super::tests::parse_lines(output);
+            let wire = output;
            let requests: Vec<_> = wire
                .iter()
                .filter(|frame| frame["method"] == "session/request_permission")
@@ -635,12 +668,8 @@ mod tests {
                    )
                    .ok_or_else(|| anyhow!("ACP permission was not retained"))?;
                rig.server
-                    .answer_permission(
-                        &permission,
-                        &json!({
-                            "result":{"outcome":{"outcome":"selected","optionId":"allow-once"}}
-                        }),
-                    )
+                    .prompt_run()
+                    .answer_permission(&permission, true)
                    .await?;
                assert_eq!(
                    tokio::time::timeout(Duration::from_secs(10), engine.recv_approval_event())
@@ -758,7 +787,7 @@ mod tests {
            })
            .await??;
            let mut terminal = None;
-            let mut settled_output = Vec::new();
+            let mut settled_output: Vec<Value> = Vec::new();
            for record in rig
                .server
                .runtime
@@ -766,7 +795,12 @@ mod tests {
            {
                if let Some(completed) = rig
                    .server
-                    .project_event(&mut projection, &record, &mut settled_output)
+                    .prompt_run()
+                    .project_event(
+                        &mut projection,
+                        &record,
+                        &mut recording(&mut settled_output),
+                    )
                    .await?
                {
                    terminal = Some(completed);
@@ -781,7 +815,7 @@ mod tests {
            assert!(projection.permissions.is_empty());
            assert!(projection.calls.is_empty());
            assert!(
-                !super::super::tests::parse_lines(settled_output)
+                !settled_output
                    .iter()
                    .any(|frame| frame["method"] == "session/request_permission")
            );
@@ -804,7 +838,7 @@ mod tests {
            calls: HashMap::new(),
            permissions: HashMap::new(),
        };
-        let mut output = Vec::new();
+        let mut output: Vec<Value> = Vec::new();
        let start = event(
            1,
            &thread,
@@ -813,11 +847,13 @@ mod tests {
            json!({"tool":{"id":"core-call","name":"read","input":{"path":"x"}}}),
        );
        rig.server
-            .project_event(&mut p, &start, &mut output)
+            .prompt_run()
+            .project_event(&mut p, &start, &mut recording(&mut output))
            .await?;
        let before = output.len();
        rig.server
-            .project_event(&mut p, &start, &mut output)
+            .prompt_run()
+            .project_event(&mut p, &start, &mut recording(&mut output))
            .await?;
        assert_eq!(output.len(), before);
        let dispatch = event(
@@ -829,7 +865,8 @@ mod tests {
        );
        assert!(
            rig.server
-                .project_event(&mut p, &dispatch, &mut output)
+                .prompt_run()
+                .project_event(&mut p, &dispatch, &mut recording(&mut output))
                .await
                .is_err()
        );
@@ -850,7 +887,7 @@ mod tests {
            calls: HashMap::new(),
            permissions: HashMap::new(),
        };
-        let mut output = Vec::new();
+        let mut output: Vec<Value> = Vec::new();
        for record in [
            event(
                1,
@@ -882,7 +919,8 @@ mod tests {
            ),
        ] {
            rig.server
-                .project_event(&mut p, &record, &mut output)
+                .prompt_run()
+                .project_event(&mut p, &record, &mut recording(&mut output))
                .await?;
        }
        assert!(output.is_empty());
@@ -904,7 +942,7 @@ mod tests {
            calls: HashMap::new(),
            permissions: HashMap::new(),
        };
-        let mut output = Vec::new();
+        let mut output: Vec<Value> = Vec::new();
        let failure = event(
            1,
            &thread,
@@ -914,7 +952,8 @@ mod tests {
        );
        let error = rig
            .server
-            .project_event(&mut p, &failure, &mut output)
+            .prompt_run()
+            .project_event(&mut p, &failure, &mut recording(&mut output))
            .await
            .unwrap_err();
        assert!(error.to_string().contains("no terminal receipt"));
@@ -922,90 +961,4 @@ mod tests {
        rig.close().await;
        Ok(())
    }
-    struct FailedAnswerWriter(Vec<u8>);
-    impl AsyncWrite for FailedAnswerWriter {
-        fn poll_write(
-            mut self: std::pin::Pin<&mut Self>,
-            _: &mut std::task::Context<'_>,
-            bytes: &[u8],
-        ) -> std::task::Poll<std::io::Result<usize>> {
-            if String::from_utf8_lossy(bytes).contains("agent_message_chunk") {
-                return std::task::Poll::Ready(Err(std::io::Error::new(
-                    std::io::ErrorKind::BrokenPipe,
-                    "fixture client disappeared after tool effect",
-                )));
-            }
-            self.0.extend_from_slice(bytes);
-            std::task::Poll::Ready(Ok(bytes.len()))
-        }
-        fn poll_flush(
-            self: std::pin::Pin<&mut Self>,
-            _: &mut std::task::Context<'_>,
-        ) -> std::task::Poll<std::io::Result<()>> {
-            std::task::Poll::Ready(Ok(()))
-        }
-        fn poll_shutdown(
-            self: std::pin::Pin<&mut Self>,
-            _: &mut std::task::Context<'_>,
-        ) -> std::task::Poll<std::io::Result<()>> {
-            std::task::Poll::Ready(Ok(()))
-        }
-    }
-    #[tokio::test(flavor = "current_thread")]
-    async fn failed_transport_after_completed_write_retains_actual_core_terminal_and_checkpoint()
-    -> Result<()> {
-        use codewhale_engine::llm_client::mock::canned;
-        let mut config = fixture_config();
-        config.yolo = Some(true);
-        let mut rig = Rig::new(
-            config,
-            vec![
-                canned::tool_call_turn(
-                    "write",
-                    "write",
-                    r#"{"path":"writer-failure.txt","content":"completed"}"#,
-                ),
-                canned::simple_text_turn("final answer"),
-            ],
-        )?;
-        let id = rig.new_session().await;
-        let (client, input) = tokio::io::duplex(1024);
-        let mut reader = crate::stdio::BoundedLines::new(BufReader::new(input));
-        let mut writer = FailedAnswerWriter(Vec::new());
-        let error = tokio::time::timeout(
-            Duration::from_secs(20),
-            rig.server.drive_prompt(
-                json!({"sessionId":id,"prompt":"write then answer"}),
-                &mut reader,
-                &mut writer,
-            ),
-        )
-        .await?
-        .unwrap_err();
-        drop(client);
-        assert!(error.to_string().contains("partial receipts retained"));
-        assert_eq!(
-            std::fs::read_to_string(rig.workspace.join("writer-failure.txt"))?,
-            "completed"
-        );
-        let store = codewhale_engine::session_manager::SessionManager::new(
-            rig.server.sessions_dir.clone(),
-        )?;
-        let saved = store.load_session(&id)?;
-        assert!(
-            saved
-                .messages
-                .iter()
-                .flat_map(|m| &m.content)
-                .any(|b| matches!(b, codewhale_models::ContentBlock::ToolResult { .. }))
-        );
-        let thread = &rig.server.sessions[&id].thread_id;
-        let detail = rig.server.runtime.get_thread_detail(thread).await?;
-        assert!(!matches!(
-            detail.turns.last().unwrap().status,
-            RuntimeTurnStatus::Queued | RuntimeTurnStatus::InProgress
-        ));
-        rig.close().await;
-        Ok(())
-    }
 }
@@ -227,6 +227,36 @@ mod platform {
            );
            Ok(())
        }
+        fn discard_if_store_gone_blocking(&self, selected_store: PathBuf) -> Result<bool> {
+            let gone =
+                codewhale_engine::runtime_threads::checked_runtime_store_root(selected_store)
+                    .is_ok_and(|selected| {
+                        selected == self.receipt().data_dir
+                            && matches!(
+                                selected.symlink_metadata(),
+                                Err(error) if error.kind() == std::io::ErrorKind::NotFound
+                            )
+                    });
+            if !gone || !matches!(self.revalidate_receipt(), Ok(true)) {
+                return Ok(false);
+            }
+            anyhow::ensure!(
+                self.publication.parent.retire_private_receipt(
+                    &self.publication.receipt_name,
+                    &self.publication.file
+                )?,
+                PublicationChangedBeforeAttach
+            );
+            Ok(true)
+        }
+        async fn discard_if_store_gone(
+            self: &Arc<Self>,
+            selected_store: &std::path::Path,
+        ) -> Result<bool> {
+            let held = self.clone();
+            let selected_store = selected_store.to_path_buf();
+            owner_work(move || held.discard_if_store_gone_blocking(selected_store)).await
+        }
        /// Caller retains the real Runtime lease; this checks evidence only.
        pub(crate) fn revalidate_receipt(&self) -> Result<bool> {
            if !self.publication.receipt_is_current()? {
@@ -345,8 +375,9 @@ mod platform {
    pub async fn probe_owner_for_host_startup(
        config_path: Option<PathBuf>,
        selected: Option<PathBuf>,
+        selected_store: &std::path::Path,
    ) -> Result<HostOwnerProbe> {
-        probe_frontend(
+        match probe_frontend(
            config_path,
            selected,
            crate::daemon_socket::AttachFrontend::Control,
@@ -355,7 +386,15 @@ mod platform {
            None,
            None,
        )
-        .await
+        .await?
+        {
+            HostOwnerProbe::Unavailable(publication)
+                if publication.discard_if_store_gone(selected_store).await? =>
+            {
+                Ok(HostOwnerProbe::Absent)
+            }
+            probe => Ok(probe),
+        }
    }

    pub async fn connect(
@@ -1349,6 +1349,7 @@ mod platform {
            let config = root.join("config.toml");
            std::fs::write(&config, "")?;
            let parent = PrivateDirectory::admit(path.parent().unwrap())?;
+            std::fs::create_dir_all(root.join("runtime"))?;
            let stale = std::os::unix::net::UnixListener::bind(&path)?;
            let identity = parent.socket_identity("daemon.sock")?.unwrap();
            parent.protect_socket("daemon.sock", identity)?;
@@ -1383,6 +1384,7 @@ mod platform {
                crate::daemon_client::probe_owner_for_host_startup(
                    Some(config.clone()),
                    Some(path.clone()),
+                    &owner.data_dir,
                )
                .await?
            else {
@@ -1392,6 +1394,7 @@ mod platform {
            let observed_hook = observed.clone();
            let selected = path.clone();
            let selected_config = config.clone();
+            let selected_store = owner.data_dir.clone();
            let stale_capture = captured.clone();
            BEFORE_OWNER_REBIND.with(|slot| {
                *slot.borrow_mut() = Some(Box::new(move |endpoint| {
@@ -1412,6 +1415,7 @@ mod platform {
                                    crate::daemon_client::probe_owner_for_host_startup(
                                        Some(selected_config),
                                        Some(endpoint),
+                                        &selected_store,
                                    )
                                    .await
                                    .unwrap(),
@@ -668,6 +668,7 @@ pub async fn run_exec_agent(
            execution_config.subagent_heartbeat_timeout_secs_for_provider(&effective_identity),
        ),
        prefer_bwrap: execution_config.prefers_bwrap(),
+        tool_launcher: execution_config.tool_launcher.clone(),
        bwrap_extensions: codewhale_sandbox::BwrapMountExtensions {
            read_only_roots: execution_config.bwrap_ro_roots.clone(),
            device_roots: execution_config.bwrap_dev_roots.clone(),
@@ -114,9 +114,11 @@ mod account;
 mod auth;
 mod automations;
 mod avatars;
+mod builtin_commands;
 mod computer_display;
 mod context;
 mod diagnostics;
+mod external_agent_options;
 mod external_agents;
 mod git;
 mod jobs;
@@ -1576,10 +1578,41 @@ struct RuntimeInfoResponse {
    job_operation_store_id: Option<String>,
    account: RuntimeAccountInfo,
    experimental: RuntimeExperimentalCapabilities,
+    sandbox: RuntimeSandboxInfo,
    // Backward-compatible alias kept for existing clients.
    version: &'static str,
 }

+#[derive(Debug, Serialize)]
+struct RuntimeSandboxInfo {
+    kind: String,
+    tool_launcher: bool,
+}
+
+async fn runtime_sandbox_info(state: &RuntimeApiState) -> RuntimeSandboxInfo {
+    let (prefer_bwrap, tool_launcher, denied_read_paths) = {
+        let cfg = state.config.read();
+        (
+            cfg.prefers_bwrap(),
+            cfg.tool_launcher.clone(),
+            codewhale_sandbox::read_guard::ReadDenylist::from_config(&cfg).subtree_paths(),
+        )
+    };
+    let launcher_configured = tool_launcher.is_some();
+    let kind = tokio::task::spawn_blocking(move || {
+        let mut manager = codewhale_sandbox::SandboxManager::with_bwrap_preference(prefer_bwrap);
+        manager.set_tool_launcher(tool_launcher);
+        manager.set_denied_read_subpaths(denied_read_paths);
+        manager.configured_sandbox().unwrap_or_default().to_string()
+    })
+    .await
+    .unwrap_or_else(|_| codewhale_sandbox::SandboxType::None.to_string());
+    RuntimeSandboxInfo {
+        kind,
+        tool_launcher: launcher_configured,
+    }
+}
+
 fn default_runtime_capabilities() -> RuntimeCapabilities {
    RuntimeCapabilities {
        client_token_intents: true,
@@ -1619,6 +1652,7 @@ fn default_runtime_capabilities() -> RuntimeCapabilities {
        worker_runtime: true,
        fleet_run_create: true,
        thread_fleet_members: true,
+        thread_fleet_member_durable_operations_v1: true,
        fleet_run_start: true,
        fleet_event_replay: true,
        fleet_event_stream: true,
@@ -2032,7 +2066,7 @@ async fn admit_runtime_host(
    tokio::time::timeout(Duration::from_secs(5), async {
        loop {
            let probe = match crate::daemon_client::probe_owner_for_host_startup(
-                config_path.clone(), selected_socket.clone(),
+                config_path.clone(), selected_socket.clone(), &selected_store,
            ).await {
                Err(error) if error.is::<PublicationChangedBeforeAttach>() => {
                    tokio::time::sleep(Duration::from_millis(25)).await;
@@ -3128,7 +3162,12 @@ pub fn build_router(state: RuntimeApiState) -> Router {
        .route("/v1/threads/{id}/context", get(context::get_thread_context))
        .route(
            "/v1/threads/{id}/members",
-            post(members::start_thread_member),
+            post(members::start_thread_member)
+                .layer(DefaultBodyLimit::max(members::MAX_MEMBER_REQUEST_BYTES)),
+        )
+        .route(
+            "/v1/threads/{id}/members/operations/{operation_key}",
+            get(members::get_member_operation),
        )
        .route("/v1/threads/{id}/plan", get(plans::get_thread_plan))
        .route("/v1/threads/{id}/todo", get(plans::get_thread_todo))
@@ -3277,6 +3316,10 @@ pub fn build_router(state: RuntimeApiState) -> Router {
        .route("/v1/skills", get(list_skills))
        .route("/v1/commands", get(list_commands))
        .route("/v1/threads/{id}/commands", post(run_thread_command))
+        .route(
+            "/v1/threads/{id}/commands/builtin",
+            post(builtin_commands::run_builtin_command),
+        )
        .route(
            "/v1/threads/{id}/commands/{operation_key}",
            get(get_thread_command).delete(cancel_thread_command),
@@ -3368,6 +3411,10 @@ pub fn build_router(state: RuntimeApiState) -> Router {
            "/v1/apps/plugins/{selector}/ui/{*path}",
            get(plugins::get_plugin_ui_asset),
        )
+        .route(
+            "/v1/apps/plugins/{selector}/routes/{*path}",
+            any(plugins::plugin_route_bridge),
+        )
        .route(
            "/v1/apps/plugins/{selector}/update",
            post(plugins::update_plugin_api),
@@ -3462,6 +3509,14 @@ pub fn build_router(state: RuntimeApiState) -> Router {
            "/v1/agents/external",
            get(external_agents::list_external_agents),
        )
+        .route(
+            "/v1/agents/external/quota",
+            get(external_agents::get_external_agent_quota),
+        )
+        .route(
+            "/v1/agents/external/{id}/options",
+            get(external_agent_options::get_external_agent_options),
+        )
        .route("/v1/providers", get(list_providers))
        .route("/v1/providers/{id}/models", get(list_provider_models))
        .route(
@@ -7059,6 +7114,7 @@ async fn runtime_info(
    capabilities.fleet_run_create = !session_only;
    capabilities.fleet_run_start = !session_only;
    capabilities.fleet_local_target = !session_only;
+    let sandbox = runtime_sandbox_info(&state).await;
    Json(RuntimeInfoResponse {
        service: "codewhale-runtime-api",
        runtime_api_version: RUNTIME_API_VERSION,
@@ -7073,6 +7129,7 @@ async fn runtime_info(
            .then(|| state.runtime_threads.job_operation_store_id().to_string()),
        account,
        experimental: RuntimeExperimentalCapabilities::default(),
+        sandbox,
        version,
    })
 }
@@ -9211,14 +9268,13 @@ async fn preview_patch_undo_thread_turn(
        .iter()
        .map(|turn| turn.turn_id.clone())
        .collect();
-    let trusted = thread.trust_mode || thread.auto_approve;
    #[cfg(any(test, feature = "test-support"))]
    let env_ticket = codewhale_engine::test_support::env_scope_ticket();
    let (result, paths) = tokio::task::spawn_blocking(move || {
        let _reservation = _reservation;
        #[cfg(any(test, feature = "test-support"))]
        let _membership = codewhale_engine::test_support::join_env_scope(env_ticket);
-        patch_undo_workspace_files_impl(&thread.workspace, &dropped_turns, trusted, true, None)
+        patch_undo_workspace_files_impl(&thread.workspace, &dropped_turns, true, None)
    })
    .await
    .map_err(|error| ApiError::internal(format!("Patch undo preview failed: {error}")))??;
@@ -9255,10 +9311,6 @@ async fn patch_undo_thread_turn(
        // Validate the selected turn/history before touching any file, so an invalid
        // undo request cannot leave a half-applied workspace.
        let prepared = prepare_patch_undo(&state, &id, &req).await?;
-        // File rollback is a workspace mutation, so it needs the trust the
-        // TUI's `/undo` requires. Read from the thread's own record: the
-        // client does not get to assert it.
-        let trusted = thread.trust_mode || thread.auto_approve;
        let workspace = thread.workspace.clone();
        // The restore points come from the dropped turns' own records, not
        // from the thread's saved-session binding or a scan of the shared
@@ -9270,7 +9322,7 @@ async fn patch_undo_thread_turn(
        let patch_result = tokio::task::spawn_blocking(move || {
            #[cfg(any(test, feature = "test-support"))]
            let _membership = codewhale_engine::test_support::join_env_scope(env_ticket);
-            patch_undo_workspace_files_impl(&workspace, &dropped_turns, trusted, false, req.expected_paths.as_deref()).map(|(result, _)| result)
+            patch_undo_workspace_files_impl(&workspace, &dropped_turns, false, req.expected_paths.as_deref()).map(|(result, _)| result)
        })
        .await
        .map_err(|e| ApiError::internal(format!("Patch undo task failed: {e}")))??;
@@ -9313,7 +9365,6 @@ const PATCH_UNDO_NO_RESTORE_POINT: &str = "restore_point_unavailable";
 const PATCH_UNDO_RESTORE_POINT_PRUNED: &str = "restore_point_pruned";
 const PATCH_UNDO_PATH_NOT_SNAPSHOTTED: &str = "path_not_snapshotted";
 const PATCH_UNDO_WORKSPACE_CHANGED: &str = "workspace_changed_since_turn";
-const PATCH_UNDO_UNTRUSTED: &str = "restore_requires_trust";
 const PATCH_UNDO_WORKSPACE_UNAVAILABLE: &str = "workspace_unavailable";

 /// One pre-turn → post-turn window of a dropped turn, resolved to the trees
@@ -9545,21 +9596,23 @@ fn no_restore_point(turn_id: &str, why: &str) -> ApiError {
 /// point, or a path changed since the turn is a `409` with a stable
 /// `error.code`, never a `201` that forks while the files stay changed.
 ///
-/// `trusted` mirrors the gate the TUI's `patch_undo()` applies
-/// (`yolo || trust_mode`), evaluated once a real change is known.
+/// # Posture
+///
+/// No trust mode or Full Access is required. Undo reverses only what the
+/// dropped turns' own tool calls wrote, and only while every such path still
+/// holds exactly the bytes the turn left; the same ownership and later-edit
+/// proofs refuse anything else, so the default posture cannot lose work the
+/// turn did not make.
 pub fn patch_undo_workspace_files(
    workspace: &FsPath,
    dropped_turns: &[codewhale_engine::runtime_threads::manager::DroppedTurnSnapshots],
-    trusted: bool,
 ) -> Result<PatchUndoResult, ApiError> {
-    patch_undo_workspace_files_impl(workspace, dropped_turns, trusted, false, None)
-        .map(|(result, _)| result)
+    patch_undo_workspace_files_impl(workspace, dropped_turns, false, None).map(|(result, _)| result)
 }

 fn patch_undo_workspace_files_impl(
    workspace: &FsPath,
    dropped_turns: &[codewhale_engine::runtime_threads::manager::DroppedTurnSnapshots],
-    trusted: bool,
    preview: bool,
    expected_paths: Option<&[String]>,
 ) -> Result<(PatchUndoResult, Vec<String>), ApiError> {
@@ -9816,17 +9869,6 @@ fn patch_undo_workspace_files_impl(
        ));
    }

-    // Restoring is a workspace mutation. Gate it exactly where the TUI gates
-    // it — after a real, owned change is known — so the two surfaces cannot
-    // drift into "one refuses, the other half-undoes".
-    if !trusted {
-        return Err(ApiError::conflict(
-            "Refusing to undo workspace files outside trusted mode. \
-             Turn on /trust or switch this thread to Full Access, then undo again.",
-        )
-        .with_code(PATCH_UNDO_UNTRUSTED));
-    }
-
    let paths: Vec<String> = to_restore
        .iter()
        .map(|(path, _, _)| path.display().to_string())
@@ -0,0 +1,255 @@
+//! `POST /v1/threads/{id}/commands/builtin` — execute a terminal built-in
+//! command against a thread, remotely.
+//!
+//! The thread's state is assembled into the engine's
+//! [`BuiltinCommandHostSnapshot`] (contract projections included) and handed
+//! to the installed command catalog, whose terminal-host implementation maps
+//! it into the facet envelope and runs the portable handlers. Which commands
+//! this serves is the host's decision (`builtin_execution::SERVED`); a name
+//! outside that set answers 404 the same way an unknown name does, so the
+//! remote surface can never widen without the host widening it first.
+//!
+//! Phase 1 notes: executions are not receipt-tracked (the phase-1 set is
+//! read-only — every served handler is pure over the snapshot), and the
+//! `text_only` flag reports commands that also asked the terminal host for an
+//! action, which a remote client cannot perform.
+
+use axum::Json;
+use axum::extract::{Path, State};
+use codewhale_command_contract::facets::{
+    DebugCostProjection, DebugRouteCost, DebugSystemPrompt, DebugTokenProjection,
+};
+use codewhale_command_contract::types::{CommandCurrency, CommandMode};
+use codewhale_engine::command_catalog::{self, BuiltinCommandHostSnapshot};
+use codewhale_models::SystemPrompt;
+use serde::Deserialize;
+
+use super::{ApiError, RuntimeApiState};
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+pub(super) struct BuiltinCommandApiRequest {
+    /// The command name (canonical or alias), with or without the slash.
+    pub name: String,
+    /// The argument tail after the command word, if any.
+    #[serde(default)]
+    pub args: Option<String>,
+}
+
+#[derive(serde::Serialize)]
+pub(super) struct BuiltinCommandApiResponse {
+    pub name: String,
+    pub text: String,
+    pub is_error: bool,
+    /// `false` when the command also asked the terminal host for an action
+    /// the remote client cannot perform.
+    pub text_only: bool,
+}
+
+pub(super) async fn run_builtin_command(
+    State(state): State<RuntimeApiState>,
+    Path(thread_id): Path<String>,
+    Json(request): Json<BuiltinCommandApiRequest>,
+) -> Result<Json<BuiltinCommandApiResponse>, ApiError> {
+    let catalog = command_catalog::installed()
+        .ok_or_else(|| ApiError::internal("command catalog is not installed"))?;
+    // Refuse a name outside the host's remote surface before reading any
+    // thread state: an unknown command and a known-but-unserved one get the
+    // same answer, and neither can be distinguished by what the read says
+    // about the daemon's idle threads.
+    if !catalog.serves_builtin(&request.name) {
+        return Err(not_served(&request.name));
+    }
+
+    let thread = state
+        .runtime_threads
+        .get_thread(&thread_id)
+        .await
+        .map_err(super::map_thread_err)?;
+
+    let snapshot = assemble_snapshot(&state, &thread_id, &thread).await?;
+
+    match catalog.execute_builtin(&request.name, request.args.as_deref(), &snapshot) {
+        Some(execution) => Ok(Json(BuiltinCommandApiResponse {
+            name: execution.name,
+            text: execution.text,
+            is_error: execution.is_error,
+            text_only: execution.text_only,
+        })),
+        // The host refused the name: the same answer an unknown command gets.
+        None => Err(not_served(&request.name)),
+    }
+}
+
+fn not_served(name: &str) -> ApiError {
+    const MAX_ECHOED_NAME_CHARS: usize = 64;
+    let shown: String = name.chars().take(MAX_ECHOED_NAME_CHARS).collect();
+    let ellipsis = if shown.len() < name.len() { "..." } else { "" };
+    ApiError::not_found(format!(
+        "no remotely executable builtin command '{shown}{ellipsis}'"
+    ))
+}
+
+/// Assemble the host snapshot for one thread from the record, the live
+/// engine's context budget, the usage aggregate, and the canonical session
+/// document. Every projection field is filled from measured data or left at
+/// its honest absence encoding; nothing is estimated into place.
+async fn assemble_snapshot(
+    state: &RuntimeApiState,
+    thread_id: &str,
+    thread: &codewhale_engine::runtime_threads::ThreadRecord,
+) -> Result<BuiltinCommandHostSnapshot, ApiError> {
+    // The live engine carries the context budget; an idle daemon thread has
+    // no honest context estimate, so the served diagnostics refuse rather
+    // than print zeros.
+    let engine = state
+        .runtime_threads
+        .loaded_engine(thread_id)
+        .await
+        .ok_or_else(|| {
+            ApiError::conflict("this thread's engine is not loaded; send a message first")
+        })?;
+    let budget = engine
+        .get_context_budget()
+        .await
+        .map_err(super::map_thread_err)?
+        .ok_or_else(|| {
+            ApiError::conflict("this thread has no live context estimate yet; send a message first")
+        })?;
+
+    let usage = state
+        .runtime_threads
+        .aggregate_usage_for_thread(thread_id)
+        .await
+        .map_err(super::map_thread_err)?;
+    let parent = &usage.parent;
+    let children = &usage.routed_children;
+    let combined = usage.combined();
+
+    // The daemon tracks no UI chat history (that is the client's layer), so
+    // the chat count is a true zero; the model transcript and the effective
+    // system prompt come from the live engine session.
+    let session = engine
+        .get_session_snapshot()
+        .await
+        .map_err(|err| ApiError::internal(format!("engine session snapshot unavailable: {err}")))?;
+    let api_message_count = session.messages.len();
+    let chat_message_count = 0;
+
+    // Currency follows the same rule the TUI's cost display applies, so the
+    // same config answers the same way on both surfaces: a Simplified-Chinese
+    // UI reading the default "usd" shows CNY, and every other spelling goes
+    // through the canonical parser (which accepts rmb and yuan) rather than a
+    // bare string compare. The CNY column is the provider-published subtotal
+    // only; a USD-picked currency keeps the authoritative USD numbers.
+    #[cfg(test)]
+    let env_ticket = codewhale_runtime::test_support::env_scope_ticket();
+    let settings = tokio::task::spawn_blocking(move || {
+        #[cfg(test)]
+        let _membership = codewhale_runtime::test_support::join_env_scope(env_ticket);
+        codewhale_runtime::settings::Settings::load_read_only()
+    })
+    .await
+    .map_err(|err| ApiError::internal(format!("settings task failed: {err}")))?
+    .map_err(|err| ApiError::internal(format!("settings unavailable: {err}")))?;
+    let locale = codewhale_localization::resolve_locale(&settings.locale);
+    let currency = match (settings.cost_currency.as_str(), locale.tag()) {
+        ("usd", "zh-Hans") => CommandCurrency::Cny,
+        _ => match codewhale_config::pricing::CostCurrency::from_setting(&settings.cost_currency) {
+            Some(codewhale_config::pricing::CostCurrency::Cny) => CommandCurrency::Cny,
+            _ => CommandCurrency::Usd,
+        },
+    };
+    let currency_amount =
+        |totals: &codewhale_engine::runtime_threads::manager::UsageTotals| match currency {
+            CommandCurrency::Cny => totals.cost_cny,
+            CommandCurrency::Usd => totals.cost_usd,
+        };
+    let parent_amount = currency_amount(parent);
+    let children_amount = currency_amount(children);
+    let total_amount = currency_amount(&combined);
+    let (priced_turns, unpriced_turns, unpriced_reasons) = match currency {
+        CommandCurrency::Cny => (
+            combined.cny_priced_turns,
+            combined.cny_unpriced_turns,
+            &combined.cny_unpriced_reasons,
+        ),
+        CommandCurrency::Usd => (
+            combined.priced_turns,
+            combined.unpriced_turns,
+            &combined.unpriced_reasons,
+        ),
+    };
+
+    let mode = CommandMode::parse(&session.mode).unwrap_or(CommandMode::Agent);
+    let mode_label = codewhale_config::AppMode::from_setting(&session.mode)
+        .label()
+        .to_string();
+    let system_prompt = match session.system_prompt {
+        None => DebugSystemPrompt::None,
+        Some(SystemPrompt::Text(text)) => DebugSystemPrompt::Text(text),
+        Some(SystemPrompt::Blocks(blocks)) => {
+            DebugSystemPrompt::Blocks(blocks.into_iter().map(|block| block.text).collect())
+        }
+    };
+
+    let cost = DebugCostProjection {
+        currency,
+        // The combined subtotal is the authoritative total, and it is by
+        // construction the parent and children amounts added up; the
+        // terminal's #244 reconciliation floor only exists because its
+        // display total and its recomputed components can drift apart. The
+        // remote aggregate cannot drift from itself, so there is no floor to
+        // report and none is invented.
+        total: total_amount,
+        parent_turns: parent_amount,
+        subagents: children_amount,
+        display_floor: 0.0,
+        priced_turns: priced_turns.clamp(0, u32::MAX as u64) as u32,
+        unpriced_turns: unpriced_turns.clamp(0, u32::MAX as u64) as u32,
+        legacy_coverage_unknown: !combined.cost_complete,
+        // Pricing-provenance bookkeeping (user-declared estimates, live
+        // defects, route receipts) is terminal-session state the daemon
+        // does not track; the honest encoding is "none recorded".
+        user_declared_estimates: false,
+        // Per-route attribution needs per-turn provider identities, which
+        // the remote snapshot does not assemble yet; the coverage counts
+        // above stay authoritative. With no route rows, no turn is itemized:
+        // claiming otherwise would make the renderer state a breakdown it
+        // cannot show.
+        itemized_turns: 0,
+        route_amounts: Vec::<DebugRouteCost>::new(),
+        turn_history_capacity: 0,
+        unpriced_reason_labels: unpriced_reasons.iter().cloned().collect(),
+        unpriced_classes: combined.unpriced_classes.iter().cloned().collect(),
+        pricing_provenances: Vec::new(),
+        live_pricing_defects: Vec::new(),
+        unusable_pricing_defects: Vec::new(),
+        route_receipts: Vec::new(),
+    };
+
+    Ok(BuiltinCommandHostSnapshot {
+        mode,
+        mode_label,
+        locale,
+        model: thread.model.clone(),
+        system_prompt,
+        tokens: DebugTokenProjection {
+            active_context_used: (budget.input_tokens as usize).min(budget.window_tokens as usize),
+            context_window: budget.window_tokens.clamp(0, u32::MAX as u64) as u32,
+            // The context budget carries no per-turn telemetry, so the
+            // last-turn columns take their honest absence encoding rather
+            // than a stale or fabricated value.
+            last_input: None,
+            last_output: None,
+            cache_hit: None,
+            cache_miss: None,
+            total_tokens: combined.input_tokens.saturating_add(combined.output_tokens),
+            cache_write_tokens: combined.cache_write_tokens,
+            api_message_count,
+            chat_message_count,
+            model: thread.model.clone(),
+            cost,
+        },
+    })
+}
@@ -0,0 +1,72 @@
+use std::path::PathBuf;
+
+use axum::Json;
+use axum::extract::{Path, Query, State};
+use serde::Deserialize;
+
+use codewhale_engine::fleet::acp::AgentOptions;
+use codewhale_engine::fleet::agents::ExecutorUnavailable;
+
+use super::{ApiError, RuntimeApiState, external_agent_refusal};
+
+const MAX_AGENT_ID_BYTES: usize = 64;
+const MAX_CWD_BYTES: usize = 4096;
+
+#[derive(Debug, Deserialize)]
+pub(super) struct OptionsQuery {
+    cwd: Option<PathBuf>,
+}
+
+fn valid_agent_id(id: &str) -> bool {
+    !id.is_empty()
+        && id.len() <= MAX_AGENT_ID_BYTES
+        && id
+            .chars()
+            .all(|ch| ch.is_ascii_alphanumeric() || matches!(ch, '-' | '_'))
+}
+
+pub(super) async fn get_external_agent_options(
+    State(state): State<RuntimeApiState>,
+    Path(id): Path<String>,
+    Query(query): Query<OptionsQuery>,
+) -> Result<Json<AgentOptions>, ApiError> {
+    if !valid_agent_id(&id) {
+        return Err(ApiError::bad_request(
+            "the agent id must name an agent from GET /v1/agents/external",
+        ));
+    }
+    let cwd = query
+        .cwd
+        .ok_or_else(|| ApiError::bad_request("cwd is required"))?;
+    let text = cwd.to_string_lossy();
+    if text.len() > MAX_CWD_BYTES || text.chars().any(char::is_control) || !cwd.is_absolute() {
+        return Err(ApiError::bad_request(
+            "cwd must be an absolute directory path",
+        ));
+    }
+    let probe = cwd.clone();
+    let is_dir = tokio::task::spawn_blocking(move || probe.is_dir())
+        .await
+        .map_err(|_| ApiError::internal("cwd check failed"))?;
+    if !is_dir {
+        return Err(ApiError::not_found(
+            "cwd is not a directory on this computer",
+        ));
+    }
+    match state
+        .runtime_threads
+        .external_agent_options(&id, &cwd)
+        .await
+    {
+        Ok(options) => Ok(Json(options)),
+        Err(error) => {
+            let mut refusal = external_agent_refusal(&error);
+            if let Some(refusal) = refusal.as_mut()
+                && refusal.code == Some(ExecutorUnavailable::UNKNOWN_AGENT)
+            {
+                refusal.status = axum::http::StatusCode::NOT_FOUND;
+            }
+            Err(refusal.unwrap_or_else(|| ApiError::internal(error.to_string())))
+        }
+    }
+}
@@ -14,10 +14,11 @@ const PROBE_REAP_TIMEOUT: Duration = Duration::from_secs(2);
 const SILENT_HANDSHAKE: &str = "It did not answer the Agent Client Protocol handshake.";

 use codewhale_engine::fleet::agents::{
-    AGENTS, ExecutorUnavailable, ExternalAgent, below_minimum, cli_version, foreign_command,
-    not_installed, resolve,
+    AGENTS, AgentQuota, ExecutorUnavailable, ExternalAgent, QuotaGate, QuotaSource, QuotaUnknown,
+    below_minimum, cli_version, foreign_command, local_signin_quota, not_installed, resolve,
 };
 use codewhale_runtime::process_tree::ProcessTree;
+use codewhale_runtime::settings::{AgentSettings, Settings};

 #[derive(Debug)]
 enum Handshake {
@@ -274,6 +275,75 @@ pub(super) async fn list_external_agents() -> Json<Value> {
    Json(json!({ "agents": found }))
 }

+fn quota_json(quota: &AgentQuota) -> Value {
+    match quota {
+        AgentQuota::Known { source, windows } => json!({
+            "status": "known",
+            "source": source.as_str(),
+            "windows": windows
+                .iter()
+                .map(|window| json!({
+                    "name": window.name,
+                    "used_percent": window.used_percent,
+                    "resets_at": window.resets_at,
+                }))
+                .collect::<Vec<_>>(),
+        }),
+        AgentQuota::Unknown(reason) => json!({
+            "status": "unknown",
+            "reason": reason.as_str(),
+        }),
+    }
+}
+
+async fn agent_quota_report(agents: &AgentSettings) -> Value {
+    let mut entries = Vec::with_capacity(AGENTS.len());
+    for agent in AGENTS {
+        let choice = agents.quota(agent.id);
+        let gate = QuotaGate {
+            enabled: choice.enabled,
+            consented: choice.consented_at.is_some(),
+        };
+        let quota = local_signin_quota(agent, gate).await;
+        entries.push(json!({
+            "id": agent.id,
+            "name": agent.name,
+            "quota": quota_json(&quota),
+        }));
+    }
+    for id in agents
+        .quota
+        .keys()
+        .filter(|id| !AGENTS.iter().any(|agent| agent.id == id.as_str()))
+    {
+        entries.push(json!({
+            "id": id,
+            "name": null,
+            "quota": quota_json(&AgentQuota::Unknown(QuotaUnknown::UnknownAgent)),
+        }));
+    }
+    json!({
+        "default_source": QuotaSource::AgentReported.as_str(),
+        "agents": entries,
+    })
+}
+
+pub(super) async fn get_external_agent_quota() -> Json<Value> {
+    #[cfg(any(test, feature = "test-support"))]
+    let env_ticket = codewhale_engine::test_support::env_scope_ticket();
+    let agents = tokio::task::spawn_blocking(move || {
+        #[cfg(any(test, feature = "test-support"))]
+        let _membership = codewhale_engine::test_support::join_env_scope(env_ticket);
+        Settings::load_read_only()
+    })
+    .await
+    .ok()
+    .and_then(Result::ok)
+    .map(|settings| settings.agents)
+    .unwrap_or_default();
+    Json(agent_quota_report(&agents).await)
+}
+
 #[cfg(all(test, unix))]
 mod tests {
    use super::*;
@@ -3,12 +3,20 @@ use std::time::Duration;
 use axum::Json;
 use axum::extract::{Path, State};
 use axum::http::StatusCode;
-use serde::Deserialize;
-use serde_json::{Value, json};
+use serde::{Deserialize, Serialize};

+use codewhale_engine::runtime_threads::job_operations::{
+    JobOperationTransaction, MEMBER_ABANDONED, MEMBER_ACCEPTED, MEMBER_RESERVED, MEMBER_UNKNOWN,
+    MemberOperation, MemberOperationRecord, member_request_fingerprint, new_member_agent_id,
+    valid_member_key,
+};
+use codewhale_engine::tools::subagent::AgentWorkerRecord;
+
+use super::jobs::operation_error;
 use super::{ApiError, RuntimeApiState, map_thread_err};

 const MEMBER_START_WAIT: Duration = Duration::from_secs(20);
+pub(super) const MAX_MEMBER_REQUEST_BYTES: usize = 2 * 1024 * 1024;
 const MAX_MEMBER_PROMPT_CHARS: usize = 256_000;

 #[derive(Debug, Deserialize)]
@@ -19,28 +27,148 @@ pub(super) struct StartMemberRequest {
    display_name: String,
    prompt: String,
    fleet: codewhale_engine::fleet::store::FleetFile,
+    #[serde(default)]
+    expected_store_id: Option<String>,
+    #[serde(default)]
+    request_fingerprint: Option<String>,
 }

-fn opaque(value: &str) -> bool {
-    !value.is_empty()
-        && value.len() <= 128
-        && value.as_bytes()[0].is_ascii_alphanumeric()
-        && value
-            .bytes()
-            .all(|byte| byte.is_ascii_alphanumeric() || b"._:-".contains(&byte))
+#[derive(Debug, Clone, Serialize)]
+pub(super) struct MemberReceipt {
+    thread_id: String,
+    member_id: String,
+    operation_key: String,
+    request_fingerprint: String,
+    runtime_store_id: String,
+    agent_id: String,
+    state: String,
 }

-pub(super) async fn start_thread_member(
-    State(state): State<RuntimeApiState>,
-    Path(thread_id): Path<String>,
-    Json(request): Json<StartMemberRequest>,
-) -> Result<(StatusCode, Json<Value>), ApiError> {
-    let display_name = request.display_name.trim();
-    if !opaque(&request.operation_key) || !opaque(&request.member_id) {
+impl MemberReceipt {
+    fn new(record: &MemberOperationRecord, state: &str) -> Self {
+        Self {
+            thread_id: record.operation.thread_id.clone(),
+            member_id: record.operation.member_id.clone(),
+            operation_key: record.operation.operation_key.clone(),
+            request_fingerprint: record.request_fingerprint.clone(),
+            runtime_store_id: record.operation.store_id.clone(),
+            agent_id: record.operation.agent_id.clone(),
+            state: state.to_string(),
+        }
+    }
+
+    fn status(&self) -> StatusCode {
+        if self.state == MEMBER_ACCEPTED {
+            StatusCode::OK
+        } else {
+            StatusCode::ACCEPTED
+        }
+    }
+}
+
+fn worker_proves(operation: &MemberOperation, worker: Option<&AgentWorkerRecord>) -> bool {
+    worker.is_some_and(|worker| {
+        worker.owner_session_id == operation.thread_id
+            && worker.spec.worker_id == operation.agent_id
+            && worker
+                .spec
+                .child_route
+                .as_ref()
+                .and_then(|route| route.requested_profile.as_deref())
+                == Some(operation.member_id.as_str())
+    })
+}
+
+fn project(
+    transaction: &JobOperationTransaction<'_>,
+    record: &mut MemberOperationRecord,
+    worker: Option<&AgentWorkerRecord>,
+    generation: &str,
+) -> anyhow::Result<String> {
+    let proven = worker_proves(&record.operation, worker);
+    match record.operation.state.as_str() {
+        MEMBER_ACCEPTED if proven => Ok(MEMBER_ACCEPTED.to_string()),
+        MEMBER_ACCEPTED => Ok(MEMBER_UNKNOWN.to_string()),
+        MEMBER_RESERVED if proven => {
+            settle(transaction, record, MEMBER_ACCEPTED)?;
+            Ok(MEMBER_ACCEPTED.to_string())
+        }
+        MEMBER_RESERVED if record.owner_generation != generation => {
+            settle(transaction, record, MEMBER_ABANDONED)?;
+            Ok(MEMBER_ABANDONED.to_string())
+        }
+        MEMBER_RESERVED => Ok(MEMBER_UNKNOWN.to_string()),
+        state => Ok(state.to_string()),
+    }
+}
+
+fn settle(
+    transaction: &JobOperationTransaction<'_>,
+    record: &mut MemberOperationRecord,
+    state: &str,
+) -> anyhow::Result<()> {
+    record.operation.state = state.to_string();
+    record.operation.updated_at_ms = chrono::Utc::now()
+        .timestamp_millis()
+        .max(record.operation.created_at_ms);
+    transaction.save_member(record)
+}
+
+async fn member_worker(
+    state: &RuntimeApiState,
+    thread_id: &str,
+    agent_id: &str,
+) -> Option<AgentWorkerRecord> {
+    state
+        .sub_agent_manager
+        .read()
+        .await
+        .get_worker_record_for_session(thread_id, agent_id)
+}
+
+async fn settle_outcome(
+    state: RuntimeApiState,
+    operation: &MemberOperation,
+    outcome: Option<Result<String, String>>,
+) -> Result<(), ApiError> {
+    let worker = match &outcome {
+        Some(Ok(agent_id)) => member_worker(&state, &operation.thread_id, agent_id).await,
+        _ => None,
+    };
+    let id = operation.id.clone();
+    let store = state.runtime_threads.job_operation_store();
+    tokio::task::spawn_blocking(move || {
+        store.with_job_operations(|transaction| {
+            let Some(mut record) = transaction.get_member(&id)? else {
+                return Ok(());
+            };
+            if record.operation.state != MEMBER_RESERVED {
+                return Ok(());
+            }
+            match outcome {
+                Some(Ok(agent_id))
+                    if agent_id == record.operation.agent_id
+                        && worker_proves(&record.operation, worker.as_ref()) =>
+                {
+                    settle(transaction, &mut record, MEMBER_ACCEPTED)
+                }
+                Some(Err(_)) => transaction.remove_member(&id),
+                _ => Ok(()),
+            }
+        })
+    })
+    .await
+    .map_err(|_| ApiError::internal("member operation settlement failed"))?
+    .map_err(operation_error)
+}
+
+fn validate(request: &StartMemberRequest) -> Result<(String, String), ApiError> {
+    if !valid_member_key(&request.operation_key) || !valid_member_key(&request.member_id) {
        return Err(ApiError::bad_request(
            "operation_key and member_id must be 1-128 URL-safe characters",
        ));
    }
+    let display_name = request.display_name.trim();
    if display_name.is_empty()
        || display_name.chars().count() > 80
        || display_name.chars().any(char::is_control)
@@ -55,47 +183,249 @@ pub(super) async fn start_thread_member(
            "prompt must contain 1-256000 characters",
        ));
    }
-    let engine = state
+    Ok((display_name.to_string(), prompt.to_string()))
+}
+
+pub(super) async fn start_thread_member(
+    State(state): State<RuntimeApiState>,
+    Path(thread_id): Path<String>,
+    Json(request): Json<StartMemberRequest>,
+) -> Result<(StatusCode, Json<MemberReceipt>), ApiError> {
+    let (display_name, prompt) = validate(&request)?;
+    let store_id = state.runtime_threads.job_operation_store_id().to_string();
+    if request
+        .expected_store_id
+        .as_deref()
+        .is_some_and(|expected| expected != store_id)
+    {
+        return Err(ApiError::conflict("member operation store changed")
+            .with_code("member_operation_store_changed"));
+    }
+    let fingerprint = member_request_fingerprint(
+        &thread_id,
+        &request.member_id,
+        &display_name,
+        &prompt,
+        &request.fleet,
+    )
+    .map_err(|_| ApiError::internal("member request fingerprint failed"))?;
+    if request
+        .request_fingerprint
+        .as_deref()
+        .is_some_and(|claimed| claimed != fingerprint)
+    {
+        return Err(
+            ApiError::bad_request("request_fingerprint does not match this request")
+                .with_code("member_request_fingerprint_mismatch"),
+        );
+    }
+    state
        .runtime_threads
-        .get_engine(&thread_id)
+        .get_thread(&thread_id)
        .await
        .map_err(map_thread_err)?;
-    let (tx, rx) = tokio::sync::oneshot::channel();
-    engine
+    let generation = state
+        .runtime_threads
+        .job_operation_generation()
+        .map_err(operation_error)?;
+    let store = state.runtime_threads.job_operation_store();
+    let key = request.operation_key.clone();
+    let lookup_thread = thread_id.clone();
+    let existing = {
+        let store = store.clone();
+        tokio::task::spawn_blocking(move || {
+            store.with_job_operations(|transaction| {
+                let id = transaction.member_operation_id(&lookup_thread, &key)?;
+                transaction.get_member(&id)
+            })
+        })
+        .await
+        .map_err(|_| ApiError::internal("member operation lookup failed"))?
+        .map_err(operation_error)?
+    };
+    if let Some(existing) = existing {
+        if existing.request_fingerprint != fingerprint {
+            return Err(
+                ApiError::conflict("member operation key belongs to a different request")
+                    .with_code("member_operation_mismatch"),
+            );
+        }
+        let receipt = replay(&state, existing, generation).await?;
+        if receipt.state == MEMBER_ABANDONED {
+            return Err(ApiError::conflict(
+                "member operation was abandoned before it started; use a new operation_key",
+            )
+            .with_code("member_operation_abandoned"));
+        }
+        return Ok((receipt.status(), Json(receipt)));
+    }
+
+    let reserve_thread = thread_id.clone();
+    let reserve_key = request.operation_key.clone();
+    let reserve_member = request.member_id.clone();
+    let reserve_fingerprint = fingerprint.clone();
+    let reserve_generation = generation.clone();
+    let reserved = {
+        let store = store.clone();
+        tokio::task::spawn_blocking(move || {
+            store.with_job_operations(|transaction| {
+                let id = transaction.member_operation_id(&reserve_thread, &reserve_key)?;
+                if let Some(existing) = transaction.get_member(&id)? {
+                    return Ok(Err(existing));
+                }
+                let now = chrono::Utc::now().timestamp_millis();
+                let record = MemberOperationRecord {
+                    schema_version: 1,
+                    operation: MemberOperation {
+                        id,
+                        store_id,
+                        thread_id: reserve_thread,
+                        member_id: reserve_member,
+                        operation_key: reserve_key,
+                        agent_id: new_member_agent_id(),
+                        state: MEMBER_RESERVED.to_string(),
+                        created_at_ms: now,
+                        updated_at_ms: now,
+                    },
+                    request_fingerprint: reserve_fingerprint,
+                    owner_generation: reserve_generation,
+                };
+                transaction.save_member(&record)?;
+                Ok(Ok(record))
+            })
+        })
+        .await
+        .map_err(|_| ApiError::internal("member operation reservation failed"))?
+        .map_err(operation_error)?
+    };
+    let record = match reserved {
+        Ok(record) => record,
+        Err(existing) => {
+            if existing.request_fingerprint != fingerprint {
+                return Err(ApiError::conflict(
+                    "member operation key belongs to a different request",
+                )
+                .with_code("member_operation_mismatch"));
+            }
+            let receipt = replay(&state, existing, generation).await?;
+            return Ok((receipt.status(), Json(receipt)));
+        }
+    };
+
+    let engine = match state.runtime_threads.get_engine(&thread_id).await {
+        Ok(engine) => engine,
+        Err(error) => {
+            settle_outcome(state.clone(), &record.operation, Some(Err(String::new()))).await?;
+            return Err(map_thread_err(error));
+        }
+    };
+    let (tx, mut rx) = tokio::sync::oneshot::channel();
+    if let Err(error) = engine
        .send(codewhale_engine::core::ops::Op::StartFleetMember {
            start: Box::new(codewhale_engine::tools::subagent::FleetMemberStart {
                operation_key: request.operation_key.clone(),
                fleet: request.fleet,
                member_id: request.member_id.clone(),
-                display_name: display_name.to_string(),
-                prompt: prompt.to_string(),
+                display_name,
+                prompt,
+                reserved_agent_id: Some(record.operation.agent_id.clone()),
            }),
            tx: std::sync::Arc::new(std::sync::Mutex::new(Some(tx))),
        })
        .await
-        .map_err(|err| ApiError::internal(format!("Failed to reach the thread's engine: {err}")))?;
-    match tokio::time::timeout(MEMBER_START_WAIT, rx).await {
-        Ok(Ok(Ok(agent_id))) => Ok((
-            StatusCode::OK,
-            Json(json!({
-                "thread_id": thread_id,
-                "member_id": request.member_id,
-                "agent_id": agent_id,
-                "state": "started",
-            })),
-        )),
-        Ok(Ok(Err(message))) => Err(ApiError::conflict(message)),
+    {
+        settle_outcome(state.clone(), &record.operation, Some(Err(String::new()))).await?;
+        return Err(ApiError::internal(format!(
+            "Failed to reach the thread's engine: {error}"
+        )));
+    }
+    match tokio::time::timeout(MEMBER_START_WAIT, &mut rx).await {
+        Ok(Ok(Ok(agent_id))) => {
+            let settled = settle_outcome(state.clone(), &record.operation, Some(Ok(agent_id)))
+                .await
+                .is_ok();
+            let receipt = if settled {
+                replay(&state, record.clone(), generation)
+                    .await
+                    .unwrap_or_else(|_| MemberReceipt::new(&record, MEMBER_UNKNOWN))
+            } else {
+                MemberReceipt::new(&record, MEMBER_UNKNOWN)
+            };
+            Ok((receipt.status(), Json(receipt)))
+        }
+        Ok(Ok(Err(message))) => {
+            settle_outcome(state.clone(), &record.operation, Some(Err(message.clone()))).await?;
+            Err(ApiError::conflict(message))
+        }
        Ok(Err(_)) => Err(ApiError::internal(
            "The engine closed before starting the member",
        )),
-        Err(_) => Ok((
-            StatusCode::ACCEPTED,
-            Json(json!({
-                "thread_id": thread_id,
-                "member_id": request.member_id,
-                "operation_key": request.operation_key,
-                "state": "queued",
-            })),
-        )),
+        Err(_) => {
+            let operation = record.operation.clone();
+            let background = state.clone();
+            tokio::spawn(async move {
+                let outcome = rx.await.ok();
+                if let Err(error) = settle_outcome(background, &operation, outcome).await {
+                    tracing::warn!(error = %error.message, "member operation settlement failed");
+                }
+            });
+            let receipt = MemberReceipt::new(&record, MEMBER_UNKNOWN);
+            Ok((receipt.status(), Json(receipt)))
+        }
    }
 }
+
+async fn replay(
+    state: &RuntimeApiState,
+    record: MemberOperationRecord,
+    generation: String,
+) -> Result<MemberReceipt, ApiError> {
+    let worker = member_worker(
+        state,
+        &record.operation.thread_id,
+        &record.operation.agent_id,
+    )
+    .await;
+    let store = state.runtime_threads.job_operation_store();
+    let id = record.operation.id.clone();
+    tokio::task::spawn_blocking(move || {
+        store.with_job_operations(|transaction| {
+            let mut record = transaction.get_member(&id)?.unwrap_or(record);
+            let state = project(transaction, &mut record, worker.as_ref(), &generation)?;
+            Ok(MemberReceipt::new(&record, &state))
+        })
+    })
+    .await
+    .map_err(|_| ApiError::internal("member operation lookup failed"))?
+    .map_err(operation_error)
+}
+
+pub(super) async fn get_member_operation(
+    State(state): State<RuntimeApiState>,
+    Path((thread_id, key)): Path<(String, String)>,
+) -> Result<Json<MemberReceipt>, ApiError> {
+    if !valid_member_key(&key) {
+        return Err(ApiError::bad_request("invalid member operation key"));
+    }
+    state
+        .runtime_threads
+        .get_thread(&thread_id)
+        .await
+        .map_err(map_thread_err)?;
+    let generation = state
+        .runtime_threads
+        .job_operation_generation()
+        .map_err(operation_error)?;
+    let store = state.runtime_threads.job_operation_store();
+    let record = tokio::task::spawn_blocking(move || {
+        store.with_job_operations(|transaction| {
+            let id = transaction.member_operation_id(&thread_id, &key)?;
+            transaction.get_member(&id)
+        })
+    })
+    .await
+    .map_err(|_| ApiError::internal("member operation lookup failed"))?
+    .map_err(operation_error)?
+    .ok_or_else(|| ApiError::not_found("member operation not found"))?;
+    Ok(Json(replay(&state, record, generation).await?))
+}
@@ -29,6 +29,7 @@ use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use sha2::{Digest, Sha256};

+use codewhale_plugins::host_services::{PersonVia, PluginApprover, ReviewApproval};
 use codewhale_plugins::marketplace::document::{
    CatalogInstallResolution, load_catalog_document, resolve_candidate_install,
 };
@@ -42,6 +43,102 @@ use super::{ApiError, RuntimeApiState};

 const PLUGIN_UI_MAX_BYTES: u64 = 8 * 1024 * 1024;
 const PLUGIN_UI_SLOT: &str = "customize.plugins.detail";
+const PLUGIN_UI_SEATS: [&str; 6] = [
+    PLUGIN_UI_SLOT,
+    "conversation.composer.dock",
+    "conversation.chat.node",
+    "workpane.panel",
+    "sidebar.section",
+    "command.row",
+];
+const DSH_BOOTSTRAP_ENTRY: &str = "__codewhale_dsh_bootstrap.js";
+const DSH_FRAME_MODULES: [&str; 4] = [
+    "react",
+    "react-dom",
+    "react-dom/client",
+    "react/jsx-runtime",
+];
+const DSH_ROUTE_METHODS: [&str; 5] = ["GET", "POST", "PUT", "PATCH", "DELETE"];
+
+enum DshSeat {
+    Seat(&'static str),
+    Unsupported(&'static str),
+}
+
+const DSH_SEAT_TABLE: [(&str, DshSeat); 30] = [
+    ("plugins.bundle.config", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    ("plugins.row.config", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    ("plugins.tab", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    ("plugins.detail.section", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    ("settings.section", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    ("settings.plugin.item", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    ("settings.general.item", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    ("settings.plugins.tab", DshSeat::Seat(PLUGIN_UI_SLOT)),
+    (
+        "conversation.chat.node",
+        DshSeat::Seat("conversation.chat.node"),
+    ),
+    (
+        "conversation.chat.turnTail",
+        DshSeat::Seat("conversation.chat.node"),
+    ),
+    (
+        "conversation.chat.assistant-actions",
+        DshSeat::Seat("conversation.chat.node"),
+    ),
+    (
+        "conversation.chat.text-interaction",
+        DshSeat::Seat("conversation.chat.node"),
+    ),
+    (
+        "conversation.user.text.node",
+        DshSeat::Seat("conversation.chat.node"),
+    ),
+    (
+        "tool.call.toolview",
+        DshSeat::Seat("conversation.chat.node"),
+    ),
+    ("conversation.view", DshSeat::Seat("conversation.chat.node")),
+    (
+        "conversation.input.dock",
+        DshSeat::Seat("conversation.composer.dock"),
+    ),
+    (
+        "conversation.input.overlay",
+        DshSeat::Seat("conversation.composer.dock"),
+    ),
+    (
+        "conversation.input.right",
+        DshSeat::Seat("conversation.composer.dock"),
+    ),
+    (
+        "conversation.composer.dock",
+        DshSeat::Seat("conversation.composer.dock"),
+    ),
+    ("sidebar.right.pane.tab", DshSeat::Seat("workpane.panel")),
+    ("main.conversation", DshSeat::Seat("workpane.panel")),
+    ("main.page-menu", DshSeat::Seat("workpane.panel")),
+    ("sidebar.panellist", DshSeat::Seat("sidebar.section")),
+    ("sidebar.workspaces", DshSeat::Seat("sidebar.section")),
+    ("sidebar.footer.action", DshSeat::Seat("sidebar.section")),
+    (
+        "sidebar.session.row.leading",
+        DshSeat::Seat("sidebar.section"),
+    ),
+    (
+        "sidebar.workspaces.session.row.action",
+        DshSeat::Seat("sidebar.section"),
+    ),
+    (
+        "conversation.session.header.actions",
+        DshSeat::Unsupported("no ADE seat yet"),
+    ),
+    (
+        "conversation.session.header.utilities",
+        DshSeat::Unsupported("no ADE seat yet"),
+    ),
+    ("contextMenu.icon", DshSeat::Unsupported("no ADE seat yet")),
+];

 // ---------------------------------------------------------------------------
 // Response shapes
@@ -176,9 +273,20 @@ pub(super) struct PluginActionResponse {
    pub(super) note: Option<&'static str>,
 }

+#[derive(Debug, Serialize)]
+pub(super) struct PluginUiBridge {
+    pub(super) kind: &'static str,
+    pub(super) dsh_version: String,
+    pub(super) compatibility_digest: String,
+}
+
 #[derive(Debug, Serialize)]
 pub(super) struct PluginUiSlotResponse {
    pub(super) slot: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub(super) dsh_slot: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub(super) bridge: Option<PluginUiBridge>,
    pub(super) base: String,
    pub(super) entry: String,
    pub(super) revision: String,
@@ -209,6 +317,7 @@ pub(super) struct InstallPluginRequest {
 #[derive(Debug, Deserialize)]
 pub(super) struct PluginUiQuery {
    pub(super) slot: Option<String>,
+    pub(super) dsh_slot: Option<String>,
 }

 #[derive(Debug, Deserialize)]
@@ -519,6 +628,18 @@ struct PluginUiGrant {
    ui_prefix: PathBuf,
    file_hashes: Arc<BTreeMap<PathBuf, String>>,
    expires: std::time::Instant,
+    dsh: Option<Arc<DshServed>>,
+}
+
+struct DshClosure {
+    package: String,
+    entry: String,
+    files: BTreeMap<String, String>,
+    host_provided: Vec<String>,
+}
+
+struct DshServed {
+    closure: DshClosure,
 }

 #[derive(Default)]
@@ -548,6 +669,12 @@ impl PluginUiGrants {
        }
    }

+    fn revoke_selector(&self, selector: &str) {
+        self.entries
+            .lock()
+            .retain(|_, value| value.selector != selector);
+    }
+
    fn get(&self, revision: &str) -> Option<PluginUiGrant> {
        let mut entries = self.entries.lock();
        let now = std::time::Instant::now();
@@ -561,7 +688,8 @@ fn ui_file_refusal(plugin: &LoadedPlugin, display: &str, error: UiFileError) ->
        UiFileError::Missing => ApiError::not_found(format!(
            "plugin '{}' has no staged file '{display}'",
            plugin.name()
-        )),
+        ))
+        .with_code("plugin_ui_file_not_reviewed"),
        UiFileError::TooLarge => ApiError::payload_too_large(format!(
            "plugin '{}' file '{display}' exceeds the 8 MiB plugin UI limit",
            plugin.name()
@@ -656,6 +784,15 @@ fn admit_ui_grant(state: &RuntimeApiState, grant: &PluginUiGrant) -> Result<(),
    Ok(())
 }

+fn valid_dsh_slot_key(key: &str) -> bool {
+    let mut chars = key.chars();
+    key.len() <= 128
+        && chars
+            .next()
+            .is_some_and(|first| first.is_ascii_alphanumeric())
+        && chars.all(|c| c.is_ascii_alphanumeric() || matches!(c, '.' | '_' | '-'))
+}
+
 fn ui_stale_revision() -> ApiError {
    ApiError {
        status: StatusCode::PRECONDITION_FAILED,
@@ -664,10 +801,300 @@ fn ui_stale_revision() -> ApiError {
    }
 }

+struct PreparedPluginUi {
+    entry: String,
+    dsh_slot: Option<String>,
+    bridge: Option<PluginUiBridge>,
+    grant: PluginUiGrant,
+}
+
+fn seat_not_admitted(plugin: &LoadedPlugin, seat: &str, dsh_slot: Option<&str>) -> ApiError {
+    let key = dsh_slot
+        .map(|key| format!(" key '{key}'"))
+        .unwrap_or_default();
+    ApiError::not_found(format!(
+        "plugin '{}' has no admitted client for seat '{seat}'{key}",
+        plugin.name()
+    ))
+    .with_code("plugin_ui_seat_not_admitted")
+}
+
+fn ui_unsupported(message: impl Into<String>) -> ApiError {
+    ApiError::bad_request(message).with_code("plugin_ui_unsupported")
+}
+
+fn sha256_hex(bytes: &[u8]) -> String {
+    Sha256::digest(bytes)
+        .iter()
+        .map(|byte| format!("{byte:02x}"))
+        .collect()
+}
+
+fn dsh_client_closure(conversion: &Value) -> Option<DshClosure> {
+    let closure = conversion
+        .get("client_closures")?
+        .as_array()?
+        .iter()
+        .find(|closure| closure.get("root").and_then(Value::as_str) == Some(""))?;
+    let files = closure
+        .get("files")?
+        .as_object()?
+        .iter()
+        .map(|(path, hash)| Some((path.clone(), hash.as_str()?.to_string())))
+        .collect::<Option<BTreeMap<_, _>>>()?;
+    let entry = closure.get("entry")?.as_str()?.to_string();
+    if !files.contains_key(&entry) {
+        return None;
+    }
+    Some(DshClosure {
+        package: closure
+            .get("package")
+            .and_then(Value::as_str)
+            .unwrap_or_default()
+            .to_string(),
+        entry,
+        files,
+        host_provided: closure
+            .get("host_provided")
+            .and_then(Value::as_array)
+            .map(|items| {
+                items
+                    .iter()
+                    .filter_map(|item| item.as_str().map(str::to_string))
+                    .collect()
+            })
+            .unwrap_or_default(),
+    })
+}
+
+fn verify_dsh_closure(
+    grant: &PluginUiGrant,
+    closure: &DshClosure,
+) -> Result<Vec<(String, Vec<u8>)>, UiFileError> {
+    let mut verified = Vec::with_capacity(closure.files.len());
+    for (path, expected) in &closure.files {
+        let relative = ui_relative_path(path)
+            .map_err(|reason| UiFileError::Invalid(format!("closure file '{path}': {reason}")))?;
+        let bytes = verified_ui_file(grant, &relative)?;
+        if sha256_hex(&bytes) != *expected {
+            return Err(UiFileError::Invalid(format!(
+                "closure file '{path}' no longer matches its reviewed hash"
+            )));
+        }
+        verified.push((path.clone(), bytes));
+    }
+    Ok(verified)
+}
+
+fn has_esm_syntax(text: &str) -> bool {
+    text.contains("import.meta")
+        || text.lines().any(|line| {
+            let line = line.trim_start();
+            [
+                "import ", "import{", "import\"", "import'", "export ", "export{", "export*",
+            ]
+            .iter()
+            .any(|prefix| line.starts_with(prefix))
+        })
+}
+
+fn dsh_closure_unsupported(closure: &DshClosure, verified: &[(String, Vec<u8>)]) -> Option<String> {
+    let missing: Vec<&str> = closure
+        .host_provided
+        .iter()
+        .map(String::as_str)
+        .filter(|module| !DSH_FRAME_MODULES.contains(module))
+        .take(5)
+        .collect();
+    if !missing.is_empty() {
+        return Some(format!(
+            "this DSH client requires modules the plugin frame does not provide yet: {}",
+            missing.join(", ")
+        ));
+    }
+    for (path, bytes) in verified {
+        let Ok(text) = std::str::from_utf8(bytes) else {
+            return Some(format!("closure file '{path}' is not UTF-8 text"));
+        };
+        if path.ends_with(".json") {
+            if serde_json::from_str::<Value>(text).is_err() {
+                return Some(format!("closure file '{path}' is not valid JSON"));
+            }
+        } else if has_esm_syntax(text) {
+            return Some(format!(
+                "closure file '{path}' uses ES module syntax; only CommonJS closures are served"
+            ));
+        }
+    }
+    None
+}
+
+fn quoted_in(text: &str, key: &str) -> bool {
+    ['"', '\'', '`']
+        .iter()
+        .any(|quote| text.contains(&format!("{quote}{key}{quote}")))
+}
+
+fn declared_dsh_keys(verified: &[(String, Vec<u8>)]) -> Vec<&'static (&'static str, DshSeat)> {
+    let texts: Vec<String> = verified
+        .iter()
+        .map(|(_, bytes)| String::from_utf8_lossy(bytes).into_owned())
+        .collect();
+    DSH_SEAT_TABLE
+        .iter()
+        .filter(|(key, _)| texts.iter().any(|text| quoted_in(text, key)))
+        .collect()
+}
+
+fn admit_dsh_seat(
+    plugin: &LoadedPlugin,
+    seat: &str,
+    requested: Option<&str>,
+    declared: &[&'static (&'static str, DshSeat)],
+) -> Result<String, ApiError> {
+    if let Some(key) = requested {
+        let Some((_, mapped)) = declared.iter().find(|(name, _)| *name == key) else {
+            return Err(seat_not_admitted(plugin, seat, requested));
+        };
+        return match mapped {
+            DshSeat::Unsupported(reason) => Err(ApiError {
+                status: StatusCode::UNPROCESSABLE_ENTITY,
+                message: format!(
+                    "plugin '{}' declares '{key}', which has no Codewhale seat: {reason}",
+                    plugin.name()
+                ),
+                code: Some("plugin_ui_seat_unsupported"),
+            }),
+            DshSeat::Seat(mapped_seat) if *mapped_seat == seat => Ok(key.to_string()),
+            DshSeat::Seat(_) => Err(seat_not_admitted(plugin, seat, requested)),
+        };
+    }
+    let mut on_seat = declared.iter().filter_map(|(name, mapped)| match mapped {
+        DshSeat::Seat(mapped_seat) if *mapped_seat == seat => Some(*name),
+        _ => None,
+    });
+    match (on_seat.next(), on_seat.next()) {
+        (None, _) => Err(seat_not_admitted(plugin, seat, None)),
+        (Some(key), None) => Ok(key.to_string()),
+        (Some(_), Some(_)) => Err(ApiError::bad_request(format!(
+            "plugin '{}' admits more than one client key on seat '{seat}'; pass dsh_slot",
+            plugin.name()
+        ))
+        .with_code("plugin_ui_dsh_slot_required")),
+    }
+}
+
+fn dsh_bridge() -> Result<PluginUiBridge, ApiError> {
+    let receipt: Value = serde_json::from_slice(codewhale_plugins::activation::DSH_COMPATIBILITY)
+        .map_err(|_| {
+        ApiError::internal("the pinned DSH compatibility receipt is unreadable")
+    })?;
+    let version = receipt
+        .get("target_dsh_version")
+        .and_then(Value::as_str)
+        .ok_or_else(|| ApiError::internal("the pinned DSH compatibility receipt has no version"))?;
+    Ok(PluginUiBridge {
+        kind: "dsh-client",
+        dsh_version: version.to_string(),
+        compatibility_digest: sha256_hex(codewhale_plugins::activation::DSH_COMPATIBILITY),
+    })
+}
+
+const DSH_BOOTSTRAP_HEAD: &str = r#""use strict";
+(function () {
+  var files = {
+"#;
+
+const DSH_BOOTSTRAP_TAIL: &str = r#"  var cache = {};
+  var probes = ["", ".js", ".mjs", ".cjs", ".json", "/index.js", "/index.mjs", "/index.cjs"];
+  var hostRequire = null;
+  function normalize(path) {
+    var out = [];
+    path.split("/").forEach(function (part) {
+      if (part === "" || part === ".") return;
+      if (part === "..") out.pop();
+      else out.push(part);
+    });
+    return out.join("/");
+  }
+  function resolve(from, id) {
+    var base = normalize(from.slice(0, from.lastIndexOf("/")) + "/" + id);
+    for (var i = 0; i < probes.length; i++) {
+      if (Object.prototype.hasOwnProperty.call(files, base + probes[i])) return base + probes[i];
+    }
+    return null;
+  }
+  function load(path) {
+    if (Object.prototype.hasOwnProperty.call(cache, path)) return cache[path].exports;
+    var module = { exports: {} };
+    cache[path] = module;
+    files[path].call(module.exports, module, module.exports, makeRequire(path));
+    return module.exports;
+  }
+  function makeRequire(from) {
+    return function (id) {
+      if (id.charAt(0) === ".") {
+        var resolved = resolve(from, id);
+        if (resolved === null) throw new Error("the plugin client requires a file outside its reviewed closure: " + id);
+        return load(resolved);
+      }
+      return hostRequire(id);
+    };
+  }
+  window.__ModuleLoader__.load({
+    id: PLUGIN_ID,
+    factory: function (require) {
+      hostRequire = require;
+      return load(ENTRY);
+    }
+  });
+})();
+"#;
+
+fn dsh_bootstrap(
+    selector: &str,
+    closure: &DshClosure,
+    verified: &[(String, Vec<u8>)],
+) -> Result<Vec<u8>, UiFileError> {
+    let quote = |text: &str| {
+        serde_json::to_string(text).map_err(|error| UiFileError::Internal(error.to_string()))
+    };
+    let mut out = String::from(DSH_BOOTSTRAP_HEAD);
+    for (path, bytes) in verified {
+        let text = std::str::from_utf8(bytes)
+            .map_err(|_| UiFileError::Invalid(format!("closure file '{path}' is not UTF-8")))?;
+        out.push_str("    ");
+        out.push_str(&quote(path)?);
+        out.push_str(": function (module, exports, require) {\n");
+        if path.ends_with(".json") {
+            out.push_str("module.exports = ");
+            out.push_str(text);
+            out.push(';');
+        } else {
+            out.push_str(text);
+        }
+        out.push_str("\n},\n");
+    }
+    out.push_str("  };\n");
+    out.push_str(&format!(
+        "  var PLUGIN_ID = {};\n  var ENTRY = {};\n",
+        quote(if closure.package.is_empty() {
+            selector
+        } else {
+            &closure.package
+        })?,
+        quote(&closure.entry)?
+    ));
+    out.push_str(DSH_BOOTSTRAP_TAIL);
+    Ok(out.into_bytes())
+}
+
 fn prepare_plugin_ui(
    state: &RuntimeApiState,
    selector: &str,
-) -> Result<(String, PluginUiGrant), ApiError> {
+    seat: &str,
+    dsh_slot: Option<&str>,
+) -> Result<PreparedPluginUi, ApiError> {
    let registry = registry_for_state(state);
    let plugin = registry
        .get(selector)
@@ -718,6 +1145,7 @@ fn prepare_plugin_ui(
        ui_prefix: PathBuf::new(),
        file_hashes: Arc::new(validated.file_hashes),
        expires: std::time::Instant::now() + std::time::Duration::from_secs(3600),
+        dsh: None,
    };
    let mut found = None;
    for candidate in ["package.json", "source/package.json"] {
@@ -745,6 +1173,7 @@ fn prepare_plugin_ui(
        return Err(ApiError::not_found(format!("plugin '{}' declares no dsh.client UI in {}; add dsh.client and exports[\"./client\"] to expose client assets", plugin.name(), ui_relative_display(&manifest_path))).with_code("plugin_ui_not_declared"));
    }
    let conversion_path = FsPath::new("CONVERSION.json");
+    let mut closure = None;
    if grant.file_hashes.contains_key(conversion_path) {
        let bytes = verified_ui_file(&grant, conversion_path)
            .map_err(|error| ui_file_refusal(&plugin, "CONVERSION.json", error))?;
@@ -759,16 +1188,39 @@ fn prepare_plugin_ui(
                .and_then(Value::as_str)
                == Some("dsh")
        {
-            return Err(ApiError::bad_request(
-                "this DSH client UI was not converted and is not supported by Codewhale yet",
-            )
-            .with_code("plugin_ui_unsupported"));
+            closure = Some(dsh_client_closure(&conversion).ok_or_else(|| {
+                ui_unsupported(
+                    "this DSH client UI was not converted and is not supported by Codewhale yet",
+                )
+            })?);
        }
    }
    grant.ui_prefix = manifest_path
        .parent()
        .unwrap_or(FsPath::new(""))
        .to_path_buf();
+    if let Some(closure) = closure {
+        let verified = verify_dsh_closure(&grant, &closure)
+            .map_err(|error| ui_file_refusal(&plugin, "client closure", error))?;
+        if let Some(reason) = dsh_closure_unsupported(&closure, &verified) {
+            return Err(ui_unsupported(format!(
+                "plugin '{}': {reason}",
+                plugin.name()
+            )));
+        }
+        let key = admit_dsh_seat(&plugin, seat, dsh_slot, &declared_dsh_keys(&verified))?;
+        grant.dsh = Some(Arc::new(DshServed { closure }));
+        admit_ui_grant(state, &grant)?;
+        return Ok(PreparedPluginUi {
+            entry: DSH_BOOTSTRAP_ENTRY.to_string(),
+            dsh_slot: Some(key),
+            bridge: Some(dsh_bridge()?),
+            grant,
+        });
+    }
+    if seat != PLUGIN_UI_SLOT || dsh_slot.is_some() {
+        return Err(seat_not_admitted(&plugin, seat, dsh_slot));
+    }
    let raw = ui_client_entry(&manifest).unwrap_or_else(|| "client.js".into());
    let relative = ui_relative_path(&raw).map_err(|reason| {
        ApiError::bad_request(format!(
@@ -779,7 +1231,12 @@ fn prepare_plugin_ui(
    verified_ui_file(&grant, &grant.ui_prefix.join(&relative))
        .map_err(|error| ui_file_refusal(&plugin, &ui_relative_display(&relative), error))?;
    admit_ui_grant(state, &grant)?;
-    Ok((ui_relative_display(&relative), grant))
+    Ok(PreparedPluginUi {
+        entry: ui_relative_display(&relative),
+        dsh_slot: None,
+        bridge: None,
+        grant,
+    })
 }

 fn plugin_ui_base(
@@ -909,6 +1366,8 @@ async fn run_plugin_mutation(
        PluginMutationOutcome::Uninstalled => "uninstalled",
    };

+    state.plugin_ui_grants.revoke_selector(&receipt.name);
+
    // Mutations can change merged plugin MCP servers. Advance the existing
    // shared generation so each captured workspace pool reloads on next use.
    state
@@ -974,8 +1433,16 @@ async fn run_registry_mutation(

    let mut registry = (*registry).clone();
    let result = match mutation {
-        RegistryMutation::Trust { .. } => registry.trust(selector),
-        RegistryMutation::Enable => registry.enable(selector),
+        RegistryMutation::Trust { .. } => registry.trust_reviewed(
+            selector,
+            ReviewApproval {
+                approved_by: PluginApprover::person(PersonVia::App),
+                host_services: None,
+            },
+        ),
+        RegistryMutation::Enable => {
+            registry.enable_by(selector, PluginApprover::person(PersonVia::App))
+        }
        RegistryMutation::Restage => registry.restage(selector),
        RegistryMutation::Disable => registry.disable(selector),
        RegistryMutation::Revoke => registry.revoke_trust(selector),
@@ -984,6 +1451,8 @@ async fn run_registry_mutation(
        ApiError::conflict(format!("{action} failed for '{selector}': {error}"))
    })?;

+    state.plugin_ui_grants.revoke_selector(selector);
+
    state
        .workspace_scopes
        .mcp_generation
@@ -1265,43 +1734,58 @@ pub(super) async fn get_plugin_ui(
        ));
    }
    let slot = query.slot.ok_or_else(|| {
-        ApiError::bad_request(
-            "the 'slot' query parameter is required; supported slot: 'customize.plugins.detail'",
-        )
+        ApiError::bad_request(format!(
+            "the 'slot' query parameter is required; seats: {}",
+            PLUGIN_UI_SEATS.join(", ")
+        ))
+        .with_code("plugin_ui_seat_unknown")
    })?;
-    if slot.as_str() != PLUGIN_UI_SLOT {
+    if !PLUGIN_UI_SEATS.contains(&slot.as_str()) {
        return Err(ApiError::bad_request(format!(
-            "slot '{slot}' is not supported; supported slot: 'customize.plugins.detail'"
-        )));
+            "slot '{slot}' is not a plugin UI seat; seats: {}",
+            PLUGIN_UI_SEATS.join(", ")
+        ))
+        .with_code("plugin_ui_seat_unknown"));
+    }
+    if let Some(key) = &query.dsh_slot
+        && !valid_dsh_slot_key(key)
+    {
+        return Err(ApiError::bad_request(
+            "dsh_slot must be 1 to 128 characters of letters, digits, '.', '_' or '-', starting with a letter or digit",
+        )
+        .with_code("plugin_ui_dsh_slot_invalid"));
    }
    let state_for_prepare = state.clone();
    let selector_for_prepare = selector.clone();
-    let (entry, grant) = tokio::task::spawn_blocking(move || {
-        prepare_plugin_ui(&state_for_prepare, &selector_for_prepare)
+    let seat = slot.clone();
+    let requested_key = query.dsh_slot.clone();
+    let prepared = tokio::task::spawn_blocking(move || {
+        prepare_plugin_ui(
+            &state_for_prepare,
+            &selector_for_prepare,
+            &seat,
+            requested_key.as_deref(),
+        )
    })
    .await
    .map_err(|_| ApiError::internal("plugin UI preparation failed"))??;
    let base = plugin_ui_base(&state, &selector, &headers, &uri)?;
-    let revision = state.plugin_ui_grants.insert(grant);
+    let revision = state.plugin_ui_grants.insert(prepared.grant);
    Ok(Json(PluginUiSlotResponse {
        slot,
+        dsh_slot: prepared.dsh_slot,
+        bridge: prepared.bridge,
        base,
-        entry,
+        entry: prepared.entry,
        revision,
    }))
 }

-pub(super) async fn get_plugin_ui_asset(
-    State(state): State<RuntimeApiState>,
-    ConnectInfo(peer): ConnectInfo<SocketAddr>,
-    Path((selector, path)): Path<(String, String)>,
-    headers: HeaderMap,
-) -> Result<Response, ApiError> {
-    if !peer.ip().is_loopback() {
-        return Err(ApiError::forbidden(
-            "plugin UI assets are available only from loopback",
-        ));
-    }
+fn grant_for_request(
+    state: &RuntimeApiState,
+    selector: &str,
+    headers: &HeaderMap,
+) -> Result<(PluginUiGrant, String), ApiError> {
    let mut values = headers.get_all(header::IF_MATCH).iter();
    let first = values.next().ok_or_else(|| ApiError {
        status: StatusCode::PRECONDITION_REQUIRED,
@@ -1319,25 +1803,101 @@ pub(super) async fn get_plugin_ui_asset(
    if grant.selector != selector || grant.authority.workspace != state.workspace {
        return Err(ui_stale_revision());
    }
+    Ok((grant, revision))
+}
+
+pub(super) async fn plugin_route_bridge(
+    State(state): State<RuntimeApiState>,
+    ConnectInfo(peer): ConnectInfo<SocketAddr>,
+    Path((selector, path)): Path<(String, String)>,
+    method: axum::http::Method,
+    headers: HeaderMap,
+) -> Result<Response, ApiError> {
+    if !peer.ip().is_loopback() {
+        return Err(ApiError::forbidden(
+            "plugin routes are available only from loopback",
+        ));
+    }
+    let (grant, revision) = grant_for_request(&state, &selector, &headers)?;
+    let state_for_route = state.clone();
+    tokio::task::spawn_blocking(move || {
+        codewhale_plugins::registry::verify_plugin_authority(&grant.authority)
+            .map_err(|_| ui_stale_revision())?;
+        admit_ui_grant(&state_for_route, &grant)?;
+        if state_for_route.plugin_ui_grants.get(&revision).is_none() {
+            return Err(ui_stale_revision());
+        }
+        if grant.dsh.is_none() {
+            return Err(ApiError::forbidden(
+                "this plugin UI grant has no DSH client and no plugin routes",
+            )
+            .with_code("plugin_route_not_admitted"));
+        }
+        Ok(())
+    })
+    .await
+    .map_err(|_| ApiError::internal("plugin route check failed"))??;
+    ui_relative_path(&path).map_err(|reason| {
+        ApiError::bad_request(format!("plugin route path '{path}' is invalid: {reason}"))
+    })?;
+    if !DSH_ROUTE_METHODS.contains(&method.as_str()) {
+        return Err(ApiError {
+            status: StatusCode::METHOD_NOT_ALLOWED,
+            message: format!("plugin routes do not accept {method}"),
+            code: None,
+        });
+    }
+    Err(ApiError::not_implemented(
+        "this Engine has no plugin web server to forward the route to yet",
+    )
+    .with_code("plugin_route_not_served"))
+}
+
+pub(super) async fn get_plugin_ui_asset(
+    State(state): State<RuntimeApiState>,
+    ConnectInfo(peer): ConnectInfo<SocketAddr>,
+    Path((selector, path)): Path<(String, String)>,
+    headers: HeaderMap,
+) -> Result<Response, ApiError> {
+    if !peer.ip().is_loopback() {
+        return Err(ApiError::forbidden(
+            "plugin UI assets are available only from loopback",
+        ));
+    }
+    let (grant, revision) = grant_for_request(&state, &selector, &headers)?;
    let relative = ui_relative_path(&path).map_err(|reason| {
        ApiError::bad_request(format!("plugin UI path '{path}' is invalid: {reason}"))
    })?;
    let content_type = ui_content_type(&relative);
+    if grant.dsh.is_some() && relative != FsPath::new(DSH_BOOTSTRAP_ENTRY) {
+        return Err(
+            ApiError::not_found("plugin UI file is not in the reviewed client closure")
+                .with_code("plugin_ui_file_not_reviewed"),
+        );
+    }
    let state_for_asset = state.clone();
    let bytes = tokio::task::spawn_blocking(move || {
        codewhale_plugins::registry::verify_plugin_authority(&grant.authority)
            .map_err(|_| ui_stale_revision())?;
-        let bytes = verified_ui_file(&grant, &grant.ui_prefix.join(&relative)).map_err(
-            |error| match error {
-                UiFileError::Missing => {
-                    ApiError::not_found("plugin UI file is not in the reviewed bundle")
-                }
-                UiFileError::TooLarge => {
-                    ApiError::payload_too_large("plugin UI file exceeds the 8 MiB limit")
-                }
-                _ => ui_stale_revision(),
-            },
-        )?;
+        let bytes = if let Some(dsh) = &grant.dsh {
+            let verified =
+                verify_dsh_closure(&grant, &dsh.closure).map_err(|_| ui_stale_revision())?;
+            dsh_bootstrap(&grant.selector, &dsh.closure, &verified)
+                .map_err(|_| ui_stale_revision())?
+        } else {
+            verified_ui_file(&grant, &grant.ui_prefix.join(&relative)).map_err(
+                |error| match error {
+                    UiFileError::Missing => {
+                        ApiError::not_found("plugin UI file is not in the reviewed bundle")
+                            .with_code("plugin_ui_file_not_reviewed")
+                    }
+                    UiFileError::TooLarge => {
+                        ApiError::payload_too_large("plugin UI file exceeds the 8 MiB limit")
+                    }
+                    _ => ui_stale_revision(),
+                },
+            )?
+        };
        admit_ui_grant(&state_for_asset, &grant)?;
        if state_for_asset.plugin_ui_grants.get(&revision).is_none() {
            return Err(ui_stale_revision());
@@ -18,9 +18,16 @@ use uuid::Uuid;
 mod command_catalog;
 #[cfg(unix)]
 mod control_socket_selection;
+#[cfg(unix)]
+mod external_agent_options;
+#[cfg(unix)]
+mod external_agent_quota;
 mod headless_catalog;
+#[cfg(any(unix, windows))]
+mod member_operations;
 #[cfg(unix)]
 mod owner_bootstrap;
+mod plugin_ui;
 mod profile_constitution;
 #[cfg(any(unix, windows))]
 mod runtime_store_convergence;
@@ -8192,18 +8199,13 @@ fn patch_undo_helper_restores_only_the_dropped_turns_changes() -> Result<()> {
    );
    let snapshot_count = repo.list(usize::MAX)?.len();
    let (preview, paths) =
-        patch_undo_workspace_files_impl(&workspace, std::slice::from_ref(&turn), true, true, None)
+        patch_undo_workspace_files_impl(&workspace, std::slice::from_ref(&turn), true, None)
            .expect("a trusted preview should succeed");
    assert!(!preview.files_restored);
    assert_eq!(paths, vec!["a.txt", "made/new.txt"]);
-    let refused = patch_undo_workspace_files_impl(
-        &workspace,
-        std::slice::from_ref(&turn),
-        true,
-        false,
-        Some(&[]),
-    )
-    .expect_err("an unreviewed file plan must refuse before restoring");
+    let refused =
+        patch_undo_workspace_files_impl(&workspace, std::slice::from_ref(&turn), false, Some(&[]))
+            .expect_err("an unreviewed file plan must refuse before restoring");
    assert_eq!(refused.status, StatusCode::CONFLICT);
    assert_eq!(refused.code, Some("undo_selection_changed"));

@@ -8212,7 +8214,7 @@ fn patch_undo_helper_restores_only_the_dropped_turns_changes() -> Result<()> {
    assert_eq!(fs::read_to_string(&other)?, "later work");
    assert_eq!(repo.list(usize::MAX)?.len(), snapshot_count);

-    let restored = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn), true)
+    let restored = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn))
        .expect("a trusted rollback should succeed");
    assert!(restored.files_restored, "{:?}", restored.summary);
    assert_eq!(fs::read_to_string(&a)?, "before", "both writes are undone");
@@ -8232,7 +8234,7 @@ fn patch_undo_helper_restores_only_the_dropped_turns_changes() -> Result<()> {
    );

    // Undoing again finds the files already at their pre-turn state.
-    let again = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn), true)
+    let again = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn))
        .expect("already restored is provably nothing to do");
    assert!(!again.files_restored);
    Ok(())
@@ -8266,7 +8268,7 @@ fn patch_undo_helper_refuses_to_overwrite_later_edits() -> Result<()> {
        true,
        shell_turn_receipts(&repo, &pre, &post, "thr_a"),
    );
-    let err = patch_undo_workspace_files(&workspace, &[turn], true)
+    let err = patch_undo_workspace_files(&workspace, &[turn])
        .expect_err("a later edit must not be overwritten");
    assert_eq!(err.status, StatusCode::CONFLICT);
    assert_eq!(err.code, Some(PATCH_UNDO_WORKSPACE_CHANGED));
@@ -8322,7 +8324,7 @@ fn patch_undo_helper_fails_honestly_without_an_owned_restore_point() -> Result<(
        ),
    ];
    for (turn, code) in cases {
-        let err = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn), true)
+        let err = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn))
            .expect_err(&turn.turn_id);
        assert_eq!(err.status, StatusCode::CONFLICT, "{}", turn.turn_id);
        assert_eq!(err.code, Some(code), "{}: {}", turn.turn_id, err.message);
@@ -8330,20 +8332,16 @@ fn patch_undo_helper_fails_honestly_without_an_owned_restore_point() -> Result<(
        assert_eq!(fs::read_to_string(&a)?, "after");
    }

-    let chat_only = patch_undo_workspace_files(
-        &workspace,
-        &[dropped_turn("chat", false, Vec::new())],
-        false,
-    )
-    .expect("a turn that ran no tools changed no files");
+    let chat_only =
+        patch_undo_workspace_files(&workspace, &[dropped_turn("chat", false, Vec::new())])
+            .expect("a turn that ran no tools changed no files");
    assert!(!chat_only.files_restored);

    // A prune that drops the restore point's tree fails closed too.
    let receipts = shell_turn_receipts(&repo, &pre, &post, "thr_a");
    repo.prune_older_than(Duration::ZERO)?;
-    let err =
-        patch_undo_workspace_files(&workspace, &[dropped_turn("pruned", true, receipts)], true)
-            .expect_err("a pruned restore point cannot be restored");
+    let err = patch_undo_workspace_files(&workspace, &[dropped_turn("pruned", true, receipts)])
+        .expect_err("a pruned restore point cannot be restored");
    assert_eq!(err.code, Some(PATCH_UNDO_RESTORE_POINT_PRUNED));
    assert_eq!(fs::read_to_string(&a)?, "after");
    Ok(())
@@ -8387,7 +8385,6 @@ fn patch_undo_helper_survives_a_prune_that_rewrites_commit_ids() -> Result<()> {
            true,
            shell_turn_receipts(&repo, &pre, &post, "thr_a"),
        )],
-        true,
    )
    .expect("the tree still resolves the restore point");
    assert!(restored.files_restored);
@@ -8481,7 +8478,6 @@ fn patch_undo_helper_attributes_changes_to_the_turns_own_tool_spans() -> Result<
        let err = patch_undo_workspace_files(
            &workspace,
            &[dropped_turn("turn_1", true, receipts(gap_writer))],
-            true,
        )
        .expect_err("another writer's change must not be reverted");
        assert_eq!(err.status, StatusCode::CONFLICT);
@@ -8508,12 +8504,9 @@ fn patch_undo_helper_attributes_changes_to_the_turns_own_tool_spans() -> Result<
        None,
        Some(changed_between(&repo, &post_tool, &clean_post)),
    );
-    let restored = patch_undo_workspace_files(
-        &workspace,
-        &[dropped_turn("turn_1", true, clean.clone())],
-        true,
-    )
-    .expect("the turn's own write restores");
+    let restored =
+        patch_undo_workspace_files(&workspace, &[dropped_turn("turn_1", true, clean.clone())])
+            .expect("the turn's own write restores");
    assert!(restored.files_restored, "{:?}", restored.summary);
    assert_eq!(fs::read_to_string(&own)?, "before");

@@ -8521,9 +8514,8 @@ fn patch_undo_helper_attributes_changes_to_the_turns_own_tool_spans() -> Result<
    fs::write(&own, "turn")?;
    let mut shell = clean.clone();
    shell[1].write_paths = None;
-    let restored =
-        patch_undo_workspace_files(&workspace, &[dropped_turn("turn_1", true, shell)], true)
-            .expect("an undeclared span owns its changes");
+    let restored = patch_undo_workspace_files(&workspace, &[dropped_turn("turn_1", true, shell)])
+        .expect("an undeclared span owns its changes");
    assert!(restored.files_restored);
    assert_eq!(fs::read_to_string(&own)?, "before");

@@ -8531,9 +8523,8 @@ fn patch_undo_helper_attributes_changes_to_the_turns_own_tool_spans() -> Result<
    fs::write(&own, "turn")?;
    let mut unknown = clean;
    unknown[2].changed_paths = None;
-    let err =
-        patch_undo_workspace_files(&workspace, &[dropped_turn("turn_1", true, unknown)], true)
-            .expect_err("an unaccounted span fails closed");
+    let err = patch_undo_workspace_files(&workspace, &[dropped_turn("turn_1", true, unknown)])
+        .expect_err("an unaccounted span fails closed");
    assert_eq!(
        err.code,
        Some(PATCH_UNDO_NO_RESTORE_POINT),
@@ -8594,7 +8585,6 @@ fn patch_undo_helper_refuses_declared_writes_snapshots_cannot_hold() -> Result<(
        let err = patch_undo_workspace_files(
            &workspace,
            &[dropped_turn("turn_1", true, receipts(&[declared]))],
-            true,
        )
        .expect_err(declared);
        assert_eq!(err.status, StatusCode::CONFLICT, "{declared}");
@@ -8609,24 +8599,24 @@ fn patch_undo_helper_refuses_declared_writes_snapshots_cannot_hold() -> Result<(
    // The same declared write from a call recorded as failed wrote nothing.
    let mut failed = dropped_turn("turn_1", true, receipts(&[".env.local"]));
    failed.unrun_tool_calls.insert("call-1".to_string());
-    let result = patch_undo_workspace_files(&workspace, &[failed], true)
-        .expect("a failed call wrote nothing");
+    let result =
+        patch_undo_workspace_files(&workspace, &[failed]).expect("a failed call wrote nothing");
    assert!(!result.files_restored);
    // Declared through the turn's items rather than a receipt.
    let mut from_items = dropped_turn("turn_1", true, receipts(&[]));
    from_items.declared_writes.push(".env.local".to_string());
-    let err = patch_undo_workspace_files(&workspace, &[from_items], true)
+    let err = patch_undo_workspace_files(&workspace, &[from_items])
        .expect_err("an item-declared ignored write refuses too");
    assert_eq!(err.code, Some(PATCH_UNDO_PATH_NOT_SNAPSHOTTED));
    Ok(())
 }

-/// The gate the TUI's `/undo` applies, stated as a contract: an untrusted
-/// thread may not roll files back. When there *is* something to roll back the
-/// whole undo aborts — nothing is changed, and the caller must not fork the
-/// conversation either.
+/// Default posture (no trust mode, no Full Access): the Runtime does not
+/// gate on trust at all, because the ownership and later-edit proofs already
+/// decide what may be reverted. A later edit in the same workspace still
+/// refuses and leaves every byte alone.
 #[test]
-fn patch_undo_helper_refuses_an_untrusted_rollback_and_touches_nothing() -> Result<()> {
+fn patch_undo_helper_restores_in_the_default_posture_and_still_refuses_later_edits() -> Result<()> {
    if git_missing() {
        return Ok(());
    }
@@ -8651,69 +8641,20 @@ fn patch_undo_helper_refuses_an_untrusted_rollback_and_touches_nothing() -> Resu
        shell_turn_receipts(&repo, &pre, &post, "thr_a"),
    );

-    let err = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn), false)
-        .expect_err("an untrusted rollback must be refused");
-    assert_eq!(err.status, StatusCode::CONFLICT);
-    assert_eq!(err.code, Some(PATCH_UNDO_UNTRUSTED));
-    assert!(
-        err.message.contains("outside trusted mode"),
-        "got: {}",
-        err.message
-    );
-    assert_eq!(
-        fs::read_to_string(&file)?,
-        "after",
-        "a refusal must leave the workspace exactly as it was"
-    );
+    fs::write(&file, "edited later by the person")?;
+    let refused = patch_undo_workspace_files(&workspace, std::slice::from_ref(&turn))
+        .expect_err("a later edit must not be overwritten");
+    assert_eq!(refused.code, Some(PATCH_UNDO_WORKSPACE_CHANGED));
+    assert_eq!(fs::read_to_string(&file)?, "edited later by the person");

-    // The identical call once trusted performs the rollback.
-    let restored = patch_undo_workspace_files(&workspace, &[turn], true)
-        .expect("a trusted rollback should succeed");
+    fs::write(&file, "after")?;
+    let restored = patch_undo_workspace_files(&workspace, &[turn])
+        .expect("the turn's own change restores without trust");
    assert!(restored.files_restored, "{:?}", restored.summary);
    assert_eq!(fs::read_to_string(&file)?, "before");
    Ok(())
 }

-/// ...but with provably nothing to roll back, an untrusted undo is still
-/// allowed: the conversation half needs no trust, and skipping it would make
-/// Undo useless in Ask / Auto-Review for no safety gain.
-#[test]
-fn patch_undo_helper_allows_an_untrusted_undo_with_nothing_to_roll_back() -> Result<()> {
-    if git_missing() {
-        return Ok(());
-    }
-    let _lock = lock_test_env();
-    let root = tempfile::tempdir()?;
-    let home = root.path().join("home");
-    fs::create_dir_all(&home)?;
-    let _home = EnvVarGuard::set("HOME", &home);
-
-    let workspace = root.path().join("workspace");
-    fs::create_dir_all(&workspace)?;
-    let repo = codewhale_snapshot::SnapshotRepo::open_or_init(&workspace)?;
-    let file = workspace.join("a.txt");
-
-    fs::write(&file, "only-state")?;
-    let pre = repo.take_snapshot("pre-turn:1", Some("thr_a"))?;
-    // The turn ran a tool but changed nothing.
-    let post = repo.take_snapshot("post-turn:1", Some("thr_a"))?;
-
-    let result = patch_undo_workspace_files(
-        &workspace,
-        &[dropped_turn(
-            "turn_1",
-            true,
-            shell_turn_receipts(&repo, &pre, &post, "thr_a"),
-        )],
-        false,
-    )
-    .expect("nothing to roll back is not a refusal");
-    assert!(!result.files_restored);
-    assert!(result.summary.is_some());
-    assert_eq!(fs::read_to_string(&file)?, "only-state");
-    Ok(())
-}
-
 fn sha256_of(path: &FsPath) -> String {
    format!(
        "sha256:{}",
@@ -11142,6 +11083,8 @@ async fn runtime_info_reports_bind_state() -> Result<()> {
    assert!(info["account"].get("refresh_token").is_none());
    assert!(info["account"].get("email").is_none());
    assert!(info["experimental"].is_object());
+    assert!(info["sandbox"]["kind"].is_string());
+    assert_eq!(info["sandbox"]["tool_launcher"], false);

    handle.abort();
    Ok(())
@@ -26506,8 +26449,9 @@ mod thread_snapshot_ownership {

    /// An undo that cannot restore files fails honestly: snapshots disabled,
    /// a legacy seeded turn with tool calls and no receipts, a restore point
-    /// pruned from the store, and an untrusted thread. Each is a 409 with a
-    /// code, no fork, and unchanged files.
+    /// pruned from the store. Each is a 409 with a code, no fork, and
+    /// unchanged files. A default-posture thread (no trust, no Full Access)
+    /// with an intact restore point is not among them: it restores.
    #[tokio::test]
    async fn undo_that_cannot_restore_files_is_refused() -> Result<()> {
        let _env = lock_test_env();
@@ -26590,7 +26534,7 @@ mod thread_snapshot_ownership {
        assert_eq!(fx.thread_count().await?, before + 1);
        drop(fx);

-        // Snapshots on again: a pruned restore point and an untrusted thread.
+        // Snapshots on again: a pruned restore point, then a default-posture thread.
        let root = test_root("honest-on");
        let _home = EnvVarGuard::set("CODEWHALE_HOME", root.join("home"));
        let Some(fx) = fixture(&root, TestServerOverrides::default()).await? else {
@@ -26612,9 +26556,9 @@ mod thread_snapshot_ownership {
            .await?
            .error_for_status()?;
        let before = fx.thread_count().await?;
-        refused(&fx, untrusted, "restore_requires_trust").await?;
-        assert_eq!(fx.read("u.txt").as_deref(), Some("u"));
-        assert_eq!(fx.thread_count().await?, before);
+        fx.undo_restoring(&untrusted, 0).await?;
+        assert_eq!(fx.read("u.txt"), None);
+        assert_eq!(fx.thread_count().await?, before + 1);
        let _ = &fx.root;
        Ok(())
    }
@@ -828,3 +828,149 @@ async fn turn_detail(
        .and_then(|turns| turns.iter().find(|turn| turn["id"] == turn_id))
        .map_or_else(|| "turn absent".to_string(), Value::to_string))
 }
+
+// ── Remote built-in execution ──
+
+/// A catalog that serves exactly one built-in remotely, so the route's name
+/// gate and snapshot hand-off can be observed without the terminal host.
+struct RemoteBuiltinCatalog;
+
+impl CommandCatalog for RemoteBuiltinCatalog {
+    fn answers_to(&self, name: &str) -> bool {
+        name == "system"
+    }
+    fn builtins(&self) -> Vec<BuiltinCommand> {
+        vec![builtin("system", vec!["xitong".to_string()])]
+    }
+    fn user_commands(&self, _workspace: &Path) -> Vec<UserCommand> {
+        Vec::new()
+    }
+    fn serves_builtin(&self, name: &str) -> bool {
+        matches!(name.trim_start_matches('/'), "system" | "xitong")
+    }
+    fn execute_builtin(
+        &self,
+        name: &str,
+        _args: Option<&str>,
+        host: &codewhale_engine::command_catalog::BuiltinCommandHostSnapshot,
+    ) -> Option<codewhale_engine::command_catalog::BuiltinCommandExecution> {
+        if !self.serves_builtin(name) {
+            return None;
+        }
+        Some(codewhale_engine::command_catalog::BuiltinCommandExecution {
+            name: "system".to_string(),
+            text: format!(
+                "{}|{}|{}",
+                host.mode_label,
+                host.model,
+                match &host.system_prompt {
+                    codewhale_command_contract::facets::DebugSystemPrompt::None => 0,
+                    codewhale_command_contract::facets::DebugSystemPrompt::Text(text) => text.len(),
+                    codewhale_command_contract::facets::DebugSystemPrompt::Blocks(blocks) =>
+                        blocks.iter().map(String::len).sum(),
+                }
+            ),
+            is_error: false,
+            text_only: true,
+        })
+    }
+}
+
+/// B5: `POST /v1/threads/{id}/commands/builtin` executes only the names the
+/// installed host serves, and answers everything else like an unknown name.
+#[tokio::test]
+async fn post_thread_builtin_command_serves_only_the_host_allowlist() -> Result<()> {
+    let _env = lock_test_env();
+    let temp = tempfile::tempdir()?;
+    let token = "builtin-route-fixture-token";
+    let root = temp.path().join("builtin-commands-route");
+    let sessions_dir = root.join("sessions");
+    let workspace = root.join("workspace");
+    fs::create_dir_all(&workspace)?;
+    let _catalog =
+        codewhale_engine::command_catalog::CatalogGuard::install(Arc::new(RemoteBuiltinCatalog));
+
+    let Some((addr, runtime_threads, handle)) = spawn_test_server_with_root_token_mobile_workspace(
+        root,
+        sessions_dir,
+        Some(token.to_string()),
+        false,
+        workspace,
+    )
+    .await?
+    else {
+        return Ok(());
+    };
+    let client = codewhale_release::tls::reqwest_client();
+    let thread = runtime_threads
+        .create_thread(CreateThreadRequest::default())
+        .await?;
+    let url = format!("http://{addr}/v1/threads/{}/commands/builtin", thread.id);
+
+    let unauthorized = client
+        .post(&url)
+        .json(&json!({ "name": "system" }))
+        .send()
+        .await?;
+    assert_eq!(unauthorized.status(), StatusCode::UNAUTHORIZED);
+
+    let cold = client
+        .post(&url)
+        .bearer_auth(token)
+        .json(&json!({ "name": "system" }))
+        .send()
+        .await?;
+    assert_eq!(cold.status(), StatusCode::CONFLICT, "cold engine");
+    runtime_threads.get_engine(&thread.id).await?;
+
+    // Not on the host's remote surface: the same answer an unknown name gets.
+    for name in ["balance", "cache", "not-a-command"] {
+        let response = client
+            .post(&url)
+            .bearer_auth(token)
+            .json(&json!({ "name": name }))
+            .send()
+            .await?;
+        assert_eq!(response.status(), StatusCode::NOT_FOUND, "{name}");
+    }
+
+    // A served name (alias spelling included) reaches the host with the
+    // thread's own state, and its text comes back unchanged.
+    for name in ["system", "/system", "xitong"] {
+        let body: Value = client
+            .post(&url)
+            .bearer_auth(token)
+            .json(&json!({ "name": name, "args": "ignored" }))
+            .send()
+            .await?
+            .error_for_status()?
+            .json()
+            .await?;
+        assert_eq!(body["name"], "system");
+        assert_eq!(body["is_error"], false);
+        assert_eq!(body["text_only"], true);
+        // One snapshot field per segment, so a route that assembled the
+        // wrong thread's state cannot pass.
+        let text = body["text"].as_str().context("builtin text")?;
+        let fields: Vec<&str> = text.split('|').collect();
+        assert_eq!(fields.len(), 3, "{text}");
+        assert!(!fields[0].is_empty(), "mode label: {text}");
+        assert_eq!(fields[1], thread.model, "model: {text}");
+        let prompt_len: usize = fields[2].parse().context("system prompt length")?;
+        assert!(prompt_len > 0, "effective system prompt reported: {text}");
+    }
+
+    // The thread id is still the address: a missing thread stays 404.
+    let missing = client
+        .post(format!(
+            "http://{addr}/v1/threads/thr_missing/commands/builtin"
+        ))
+        .bearer_auth(token)
+        .json(&json!({ "name": "system" }))
+        .send()
+        .await?;
+    assert_eq!(missing.status(), StatusCode::NOT_FOUND);
+
+    handle.abort();
+    Ok(())
+}
@@ -0,0 +1,184 @@
+use super::*;
+use reqwest::StatusCode as HttpStatus;
+
+fn options_fixture() -> PathBuf {
+    Path::new(env!("CARGO_MANIFEST_DIR"))
+        .join("../engine/tests/fixtures/acp-options-agent.mjs")
+        .canonicalize()
+        .expect("the options fixture agent")
+}
+
+fn with_query(base: &str, pairs: &[(&str, &str)]) -> reqwest::Url {
+    let mut url = reqwest::Url::parse(base).expect("a url");
+    for (key, value) in pairs {
+        url.query_pairs_mut().append_pair(key, value);
+    }
+    url
+}
+
+fn received(workspace: &Path) -> Vec<Value> {
+    fs::read_to_string(workspace.join("options-received.jsonl"))
+        .unwrap_or_default()
+        .lines()
+        .filter_map(|line| serde_json::from_str(line).ok())
+        .collect()
+}
+
+async fn wait_for_usage_total(
+    manager: &SharedRuntimeThreadManager,
+    thread_id: &str,
+) -> Result<RuntimeEventRecord> {
+    for _ in 0..600 {
+        let events = manager.events_since_async(thread_id, None).await?;
+        if let Some(event) = events.into_iter().find(|event| {
+            event.event == "turn.agent_usage" && event.payload["kind"] == "turn_total"
+        }) {
+            return Ok(event);
+        }
+        sleep(Duration::from_millis(50)).await;
+    }
+    bail!("the agent's usage was never recorded")
+}
+
+#[tokio::test]
+async fn the_options_route_offers_the_agents_choices_and_a_chosen_one_reaches_it() -> Result<()> {
+    let _env = lock_test_env();
+    let _fixture = EnvVarGuard::set("CODEWHALE_ACP_FIXTURE_AGENT", options_fixture());
+    let Some((addr, manager, handle)) = spawn_test_server().await? else {
+        return Ok(());
+    };
+    let client = codewhale_release::tls::reqwest_client();
+    let workspace = tempfile::tempdir()?;
+    let cwd = workspace.path().canonicalize()?;
+    let url = format!("http://{addr}/v1/agents/external/fixture/options");
+
+    let offered: Value = client
+        .get(with_query(&url, &[("cwd", cwd.to_str().unwrap())]))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    assert_eq!(offered["agent"]["id"], "fixture");
+    let controls = offered["controls"].as_array().unwrap();
+    let model = controls.iter().find(|c| c["id"] == "model").unwrap();
+    let values: Vec<&str> = model["choices"]
+        .as_array()
+        .unwrap()
+        .iter()
+        .map(|c| c["value"].as_str().unwrap())
+        .collect();
+    assert!(values.len() >= 2, "{values:?}");
+    assert!(controls.iter().any(|c| c["id"] == "mode"));
+    assert!(
+        controls.iter().any(|c| c["id"] == "config:verbose"
+            && c["unavailable"]["code"] == "control_type_unsupported")
+    );
+    assert!(
+        offered["actions"]
+            .as_array()
+            .unwrap()
+            .iter()
+            .any(|a| a["action"] == "steering" && a["supported"] == false)
+    );
+    let leaked = fs::read_to_string(cwd.join("options-env.json"))?;
+    assert!(!leaked.contains("CODEWHALE_ACP_FIXTURE_AGENT"));
+
+    for (query, status, code) in [
+        (vec![], HttpStatus::BAD_REQUEST, None),
+        (vec![("cwd", "relative/dir")], HttpStatus::BAD_REQUEST, None),
+        (
+            vec![("cwd", "/definitely/not/here")],
+            HttpStatus::NOT_FOUND,
+            None,
+        ),
+    ] {
+        let response = client.get(with_query(&url, &query)).send().await?;
+        assert_eq!(response.status(), status, "{query:?}");
+        let body: Value = response.json().await?;
+        assert_eq!(body["error"]["code"].as_str(), code, "{body}");
+    }
+    let unknown = client
+        .get(with_query(
+            &format!("http://{addr}/v1/agents/external/nope/options"),
+            &[("cwd", cwd.to_str().unwrap())],
+        ))
+        .send()
+        .await?;
+    assert_eq!(unknown.status(), HttpStatus::NOT_FOUND);
+    let body: Value = unknown.json().await?;
+    assert_eq!(body["error"]["code"], "unknown_agent");
+    let bad_id = client
+        .get(with_query(
+            &format!("http://{addr}/v1/agents/external/..%2Fsh/options"),
+            &[("cwd", cwd.to_str().unwrap())],
+        ))
+        .send()
+        .await?;
+    assert!(bad_id.status().is_client_error());
+
+    let chosen = values[1];
+    let created: Value = client
+        .post(format!("http://{addr}/v1/threads"))
+        .json(&json!({
+            "workspace": cwd,
+            "permission_posture": "ask",
+            "executor": {"kind": "acp", "agent_id": "fixture", "config": {"model": chosen}}
+        }))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    let thread_id = created["id"].as_str().unwrap().to_string();
+
+    let refused = client
+        .post(format!("http://{addr}/v1/threads/{thread_id}/turns"))
+        .json(&json!({"prompt": "x", "model": "other"}))
+        .send()
+        .await?;
+    assert_eq!(refused.status(), HttpStatus::FAILED_DEPENDENCY);
+    let body: Value = refused.json().await?;
+    assert_eq!(body["error"]["code"], "unsupported_control");
+
+    client
+        .post(format!("http://{addr}/v1/threads/{thread_id}/turns"))
+        .json(&json!({"prompt": "hello"}))
+        .send()
+        .await?
+        .error_for_status()?;
+    let total = wait_for_usage_total(&manager, &thread_id).await?;
+    assert_eq!(total.payload["source"], "agent reported");
+    assert_eq!(total.payload["cost"], "unknown");
+    assert_eq!(total.payload["tokens"]["total_tokens"], 150);
+    let log = received(&cwd);
+    let prompt = log
+        .iter()
+        .find(|e| e["method"] == "session/prompt")
+        .unwrap();
+    assert_eq!(prompt["state"]["model"], chosen);
+
+    let stale = client
+        .post(format!("http://{addr}/v1/threads"))
+        .json(&json!({
+            "workspace": cwd,
+            "executor": {"kind": "acp", "agent_id": "fixture", "config": {"model": "model-z"}}
+        }))
+        .send()
+        .await?
+        .error_for_status()?
+        .json::<Value>()
+        .await?;
+    let stale_id = stale["id"].as_str().unwrap();
+    let response = client
+        .post(format!("http://{addr}/v1/threads/{stale_id}/turns"))
+        .json(&json!({"prompt": "x"}))
+        .send()
+        .await?;
+    assert_eq!(response.status(), HttpStatus::FAILED_DEPENDENCY);
+    let body: Value = response.json().await?;
+    assert_eq!(body["error"]["code"], "choice_not_offered");
+
+    handle.abort();
+    Ok(())
+}
@@ -0,0 +1,202 @@
+use super::*;
+use reqwest::StatusCode as HttpStatus;
+use std::collections::BTreeMap;
+
+const FIXTURE_TOKEN: &str = "cw-fixture-token-7993-do-not-echo";
+
+fn reasons(body: &Value) -> BTreeMap<String, String> {
+    body["agents"]
+        .as_array()
+        .expect("agents array")
+        .iter()
+        .map(|entry| {
+            assert!(
+                entry["quota"].get("source").is_none(),
+                "no source without a reader: {entry}"
+            );
+            assert_eq!(entry["quota"]["status"], "unknown", "{entry}");
+            (
+                entry["id"].as_str().expect("id").to_string(),
+                entry["quota"]["reason"]
+                    .as_str()
+                    .expect("reason")
+                    .to_string(),
+            )
+        })
+        .collect()
+}
+
+fn snapshot(paths: &[PathBuf]) -> Vec<(Vec<u8>, std::time::SystemTime)> {
+    paths
+        .iter()
+        .map(|path| {
+            (
+                fs::read(path).expect("fixture credential"),
+                fs::metadata(path)
+                    .and_then(|meta| meta.modified())
+                    .expect("mtime"),
+            )
+        })
+        .collect()
+}
+
+#[tokio::test]
+async fn agent_quota_reads_nothing_until_flag_and_consent_and_never_echoes_a_token() -> Result<()> {
+    let _env = lock_test_env();
+    let root = tempfile::tempdir()?;
+    let home = root.path().join("home");
+    let mut credentials = Vec::new();
+    for (dir, file) in [
+        (".claude", ".credentials.json"),
+        (".codex", "auth.json"),
+        (".gemini", "oauth_creds.json"),
+        (".kimi", "credentials.json"),
+        (".grok", "auth.json"),
+    ] {
+        let dir = home.join(dir);
+        fs::create_dir_all(&dir)?;
+        let path = dir.join(file);
+        fs::write(
+            &path,
+            format!(r#"{{"access_token":"{FIXTURE_TOKEN}","refresh_token":"{FIXTURE_TOKEN}"}}"#),
+        )?;
+        credentials.push(path);
+    }
+    let before = snapshot(&credentials);
+    let config_file = root.path().join("config").join("config.toml");
+    fs::create_dir_all(config_file.parent().unwrap())?;
+    fs::write(
+        &config_file,
+        "provider = \"deepseek\"\napi_key = \"runtime-api-test-key\"\nbase_url = \"http://127.0.0.1:1/v1\"\n",
+    )?;
+    let _home = EnvVarGuard::set("HOME", &home);
+    let _config = EnvVarGuard::set("CODEWHALE_CONFIG_PATH", &config_file);
+    let Some((addr, _runtime_threads, handle)) =
+        spawn_test_server_with_config_path(config_file.clone()).await?
+    else {
+        return Ok(());
+    };
+    let client = codewhale_release::tls::reqwest_client();
+    let mut seen = String::new();
+
+    let read = || {
+        let client = client.clone();
+        let url = format!("http://{addr}/v1/agents/external/quota");
+        async move {
+            let text = client
+                .get(url)
+                .send()
+                .await?
+                .error_for_status()?
+                .text()
+                .await?;
+            Ok::<String, anyhow::Error>(text)
+        }
+    };
+    let set = |key: &'static str, value: &'static str| {
+        let client = client.clone();
+        let url = format!("http://{addr}/v1/config");
+        async move {
+            let response = client
+                .post(url)
+                .json(&json!({"key": key, "value": value, "persist": true}))
+                .send()
+                .await?;
+            let status = response.status();
+            Ok::<(HttpStatus, String), anyhow::Error>((status, response.text().await?))
+        }
+    };
+
+    let text = read().await?;
+    seen.push_str(&text);
+    let body: Value = serde_json::from_str(&text)?;
+    assert_eq!(body["default_source"], "agent_reported");
+    let initial = reasons(&body);
+    assert_eq!(initial.len(), codewhale_engine::fleet::agents::AGENTS.len());
+    assert!(
+        initial.values().all(|reason| reason == "flag_off"),
+        "{initial:?}"
+    );
+
+    for (key, value) in [
+        ("agents.quota.claude", "on"),
+        ("agents.quota.codex.consent", "granted"),
+    ] {
+        let (status, text) = set(key, value).await?;
+        seen.push_str(&text);
+        assert_eq!(status, HttpStatus::OK, "{key}: {text}");
+    }
+    let text = read().await?;
+    seen.push_str(&text);
+    let gated = reasons(&serde_json::from_str(&text)?);
+    assert_eq!(gated["claude"], "consent_missing");
+    assert_eq!(gated["codex"], "flag_off");
+    assert_eq!(gated["grok"], "flag_off");
+
+    for (key, value) in [
+        ("agents.quota.claude.consent", "granted"),
+        ("agents.quota.codex", "true"),
+    ] {
+        let (status, text) = set(key, value).await?;
+        seen.push_str(&text);
+        assert_eq!(status, HttpStatus::OK, "{key}: {text}");
+    }
+    let saved = codewhale_runtime::settings::Settings::load_persisted()?;
+    assert!(saved.agents.quota("claude").enabled);
+    assert!(saved.agents.quota("claude").consented_at.is_some());
+    let text = read().await?;
+    seen.push_str(&text);
+    let consented = reasons(&serde_json::from_str(&text)?);
+    assert_eq!(consented["claude"], "not_implemented");
+    assert_eq!(consented["codex"], "not_implemented");
+    assert_eq!(consented["opencode"], "flag_off");
+
+    for (key, value) in [
+        ("agents.quota.claude.consent", "revoked"),
+        ("agents.quota.codex", "off"),
+    ] {
+        let (status, text) = set(key, value).await?;
+        seen.push_str(&text);
+        assert_eq!(status, HttpStatus::OK, "{key}: {text}");
+    }
+    let text = read().await?;
+    seen.push_str(&text);
+    let revoked = reasons(&serde_json::from_str(&text)?);
+    assert_eq!(revoked["claude"], "consent_missing");
+    assert_eq!(revoked["codex"], "flag_off");
+
+    for (key, value) in [
+        ("agents.quota.claude.consent", FIXTURE_TOKEN),
+        ("agents.quota.Claude/../x", "on"),
+        ("agents.quota.claude", FIXTURE_TOKEN),
+    ] {
+        let (status, text) = set(key, value).await?;
+        assert_eq!(status, HttpStatus::BAD_REQUEST, "{key}: {text}");
+        seen.push_str(&text);
+    }
+
+    let (status, text) = set("agents.quota.not-an-agent", "on").await?;
+    seen.push_str(&text);
+    assert_eq!(status, HttpStatus::OK, "{text}");
+    let text = read().await?;
+    seen.push_str(&text);
+    assert_eq!(
+        reasons(&serde_json::from_str(&text)?)["not-an-agent"],
+        "unknown_agent"
+    );
+
+    let settings_file = fs::read_to_string(config_file.with_file_name("settings.toml"))?;
+    assert!(
+        settings_file.contains("[agents.quota.claude]"),
+        "{settings_file}"
+    );
+    assert!(!settings_file.contains(FIXTURE_TOKEN));
+    assert!(
+        !seen.contains(FIXTURE_TOKEN),
+        "a response echoed the fixture token"
+    );
+    assert_eq!(snapshot(&credentials), before, "a credential file changed");
+
+    handle.abort();
+    Ok(())
+}
@@ -0,0 +1,285 @@
+use super::*;
+use codewhale_engine::llm_client::mock::MockLlmClient;
+use codewhale_engine::runtime_threads::job_operations::{
+    MEMBER_RESERVED, MemberOperation, MemberOperationRecord,
+};
+
+struct AbortOnDrop(tokio::task::AbortHandle);
+impl Drop for AbortOnDrop {
+    fn drop(&mut self) {
+        self.0.abort();
+    }
+}
+
+fn fleet() -> Value {
+    json!({
+        "schema": "fleet",
+        "schema_revision": 2,
+        "name": "Review team",
+        "members": [
+            { "id": "reviewer", "role": "reviewer", "provider": "deepseek", "model": "deepseek-v4-pro" }
+        ]
+    })
+}
+
+fn start_body(key: &str, prompt: &str) -> Value {
+    json!({
+        "operation_key": key,
+        "member_id": "reviewer",
+        "display_name": "Reviewer",
+        "prompt": prompt,
+        "fleet": fleet(),
+    })
+}
+
+fn reserve(
+    threads: &SharedRuntimeThreadManager,
+    thread_id: &str,
+    key: &str,
+    generation: &str,
+) -> Result<()> {
+    threads
+        .job_operation_store()
+        .with_job_operations(|transaction| {
+            let now = chrono::Utc::now().timestamp_millis();
+            transaction.save_member(&MemberOperationRecord {
+                schema_version: 1,
+                operation: MemberOperation {
+                    id: transaction.member_operation_id(thread_id, key)?,
+                    store_id: threads.job_operation_store_id().to_string(),
+                    thread_id: thread_id.to_string(),
+                    member_id: "reviewer".to_string(),
+                    operation_key: key.to_string(),
+                    agent_id: "agent_reservedfixture".to_string(),
+                    state: MEMBER_RESERVED.to_string(),
+                    created_at_ms: now,
+                    updated_at_ms: now,
+                },
+                request_fingerprint: "a".repeat(64),
+                owner_generation: generation.to_string(),
+            })
+        })
+}
+
+#[tokio::test]
+async fn member_starts_are_durable_replayable_and_refuse_foreign_or_mismatched_replay() -> Result<()>
+{
+    let _env = lock_test_env();
+    let temporary = tempfile::tempdir()?;
+    let root = temporary.path().canonicalize()?;
+    let _home = EnvVarGuard::set("CODEWHALE_HOME", root.join("home"));
+    let workspace = root.join("workspace");
+    fs::create_dir_all(&workspace)?;
+    let config = Config::default().with_legacy_root(
+        Some("member-fixture-key".into()),
+        Some("http://127.0.0.1:1/v1".into()),
+    );
+    let (addr, threads, server) = spawn_test_server_with_root_token_mobile_workspace_and_overrides(
+        root.clone(),
+        root.join("sessions"),
+        None,
+        false,
+        workspace.clone(),
+        TestServerOverrides {
+            config: Some(config),
+            ..TestServerOverrides::default()
+        },
+    )
+    .await?
+    .context("the member fixture needs a loopback listener")?;
+    let _server = AbortOnDrop(server.abort_handle());
+    threads.set_test_model_client(Arc::new(MockLlmClient::new(Vec::new())));
+    let client = codewhale_release::tls::reqwest_client();
+    let url = |path: &str| format!("http://{addr}{path}");
+    let create_thread = || async {
+        let created: Value = client
+            .post(url("/v1/threads"))
+            .json(&json!({ "model": "deepseek-v4-pro", "mode": "agent", "workspace": workspace }))
+            .send()
+            .await?
+            .error_for_status()?
+            .json()
+            .await?;
+        anyhow::Ok(created["id"].as_str().context("thread id")?.to_string())
+    };
+    let thread = create_thread().await?;
+    let other = create_thread().await?;
+    let info: Value = client
+        .get(url("/v1/runtime/info"))
+        .send()
+        .await?
+        .json()
+        .await?;
+    assert_eq!(
+        info["capabilities"]["thread_fleet_member_durable_operations_v1"],
+        true
+    );
+    let store_id = threads.job_operation_store_id().to_string();
+    let members = url(&format!("/v1/threads/{thread}/members"));
+
+    let first = client
+        .post(&members)
+        .json(&start_body("team-start-1", "Review the diff"))
+        .send()
+        .await?;
+    let status = first.status();
+    let receipt: Value = first.json().await?;
+    assert_eq!(status, StatusCode::OK, "{receipt}");
+    assert_eq!(receipt["state"], "accepted");
+    assert_eq!(receipt["runtime_store_id"], store_id.as_str());
+    assert_eq!(receipt["operation_key"], "team-start-1");
+    let agent_id = receipt["agent_id"]
+        .as_str()
+        .context("agent id")?
+        .to_string();
+    let runs = member_runs(&client, addr, &thread).await?;
+    assert_eq!(runs.len(), 1, "{runs:?}");
+    assert_eq!(
+        runs[0]["spec"]["worker_id"],
+        agent_id.as_str(),
+        "the receipt names the worker it started"
+    );
+
+    let replayed: Value = client
+        .post(&members)
+        .json(&start_body("team-start-1", "Review the diff"))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    assert_eq!(
+        replayed, receipt,
+        "exact replay returns the original receipt"
+    );
+    let read: Value = client
+        .get(url(&format!(
+            "/v1/threads/{thread}/members/operations/team-start-1"
+        )))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    assert_eq!(read, receipt);
+
+    let mismatched = client
+        .post(&members)
+        .json(&start_body("team-start-1", "Review something else"))
+        .send()
+        .await?;
+    assert_eq!(mismatched.status(), StatusCode::CONFLICT);
+    let body: Value = mismatched.json().await?;
+    assert_eq!(body["error"]["code"], "member_operation_mismatch");
+
+    let foreign = client
+        .get(url(&format!(
+            "/v1/threads/{other}/members/operations/team-start-1"
+        )))
+        .send()
+        .await?;
+    assert_eq!(
+        foreign.status(),
+        StatusCode::NOT_FOUND,
+        "a key never crosses threads"
+    );
+
+    let mut ghost = start_body("team-ghost", "Review the diff");
+    ghost["member_id"] = json!("ghost");
+    let refused = client.post(&members).json(&ghost).send().await?;
+    assert_eq!(refused.status(), StatusCode::CONFLICT);
+    let withdrawn = client
+        .get(url(&format!(
+            "/v1/threads/{thread}/members/operations/team-ghost"
+        )))
+        .send()
+        .await?;
+    assert_eq!(
+        withdrawn.status(),
+        StatusCode::NOT_FOUND,
+        "a start the Engine refused withdraws its reservation"
+    );
+
+    let mut stale = start_body("team-start-2", "Review the diff");
+    stale["expected_store_id"] = json!("another-store");
+    let stale = client.post(&members).json(&stale).send().await?;
+    assert_eq!(stale.status(), StatusCode::CONFLICT);
+    let body: Value = stale.json().await?;
+    assert_eq!(body["error"]["code"], "member_operation_store_changed");
+
+    let mut forged = start_body("team-start-3", "Review the diff");
+    forged["request_fingerprint"] = json!("b".repeat(64));
+    let forged = client.post(&members).json(&forged).send().await?;
+    assert_eq!(forged.status(), StatusCode::BAD_REQUEST);
+
+    let generation = threads.job_operation_generation()?;
+    reserve(&threads, &other, "in-flight", &generation)?;
+    let deleted = threads.delete_thread(&other).await;
+    assert!(
+        deleted
+            .as_ref()
+            .is_err_and(|error| error.to_string().contains("pending member operation")),
+        "a thread with a start in flight is not deleted: {deleted:?}"
+    );
+
+    reserve(
+        &threads,
+        &other,
+        "before-restart",
+        &Uuid::new_v4().to_string(),
+    )?;
+    let abandoned: Value = client
+        .get(url(&format!(
+            "/v1/threads/{other}/members/operations/before-restart"
+        )))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    assert_eq!(
+        abandoned["state"], "abandoned",
+        "a reservation an earlier Engine never started is settled, not left unknown"
+    );
+
+    let cancelled = client
+        .post(url(&format!("/v1/agent-runs/{agent_id}/cancel")))
+        .send()
+        .await?;
+    assert!(cancelled.status().is_success(), "{}", cancelled.status());
+    let after_cancel: Value = client
+        .post(&members)
+        .json(&start_body("team-start-1", "Review the diff"))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    assert_eq!(
+        after_cancel["agent_id"], agent_id,
+        "owner cancellation never makes a replay start a second worker"
+    );
+    assert_eq!(member_runs(&client, addr, &thread).await?.len(), 1);
+    Ok(())
+}
+
+async fn member_runs(
+    client: &reqwest::Client,
+    addr: SocketAddr,
+    thread: &str,
+) -> Result<Vec<Value>> {
+    let listed: Value = client
+        .get(format!("http://{addr}/v1/agent-runs"))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    Ok(listed["runs"]
+        .as_array()
+        .context("runs")?
+        .iter()
+        .filter(|run| run["owner_session_id"] == thread)
+        .cloned()
+        .collect())
+}
@@ -0,0 +1,537 @@
+use super::*;
+
+const SEATS: [&str; 6] = [
+    "customize.plugins.detail",
+    "conversation.composer.dock",
+    "conversation.chat.node",
+    "workpane.panel",
+    "sidebar.section",
+    "command.row",
+];
+
+const CONSUMER_BRIDGE_KEYS: [&str; 7] = [
+    "kind",
+    "dsh_version",
+    "cordis_version",
+    "compatibility_digest",
+    "declared_range",
+    "matched_version",
+    "admission",
+];
+
+const CONSUMER_REFUSALS: [(u16, &str); 6] = [
+    (404, "plugin_ui_not_declared"),
+    (404, "plugin_ui_seat_not_admitted"),
+    (400, "plugin_ui_unsupported"),
+    (422, "plugin_ui_seat_unsupported"),
+    (400, "plugin_ui_seat_unknown"),
+    (404, "plugin_ui_file_not_reviewed"),
+];
+
+const DSH_CLIENT: &str = "const react = require(\"react\");\n\
+const util = require(\"./util\");\n\
+const keys = [\"sidebar.right.pane.tab\", \"settings.section\", \"conversation.session.header.utilities\"];\n\
+exports.apply = function apply(ctx) { return [react, util.v, keys, ctx]; };\n";
+
+fn write_dsh_package(dir: &Path, name: &str, client: &str) -> Result<PathBuf> {
+    let package = dir.join(name);
+    fs::create_dir_all(package.join("lib"))?;
+    fs::write(
+        package.join("package.json"),
+        serde_json::json!({
+            "name": format!("@demo/{name}"),
+            "version": "1.0.0",
+            "exports": { "./client": { "default": "./lib/client.js" } },
+            "dsh": {
+                "bundle": { "patch": "./cordis.patch.yml" },
+                "client": { "platform": "web" }
+            }
+        })
+        .to_string(),
+    )?;
+    fs::write(
+        package.join("cordis.patch.yml"),
+        "- insert:\n  - id: skills\n    name: \"@deepseek-ai/dsh-skill-filesystem\"\n    config:\n      customSkillDirs:\n        - ./skills\n",
+    )?;
+    fs::create_dir_all(package.join("skills/greet"))?;
+    fs::write(
+        package.join("skills/greet/SKILL.md"),
+        "---\nname: greet\ndescription: Greets a person\n---\nSay hi.\n",
+    )?;
+    fs::write(package.join("lib/client.js"), client)?;
+    fs::write(package.join("lib/util.js"), "exports.v = 1;\n")?;
+    Ok(package)
+}
+
+fn write_native_ui_bundle(dir: &Path, name: &str) -> Result<PathBuf> {
+    let bundle = write_plugin_source_bundle(dir, name)?;
+    fs::write(
+        bundle.join("package.json"),
+        serde_json::json!({
+            "name": name,
+            "version": "1.0.0",
+            "exports": { "./client": "./client.js" },
+            "dsh": { "client": { "platform": "web" } }
+        })
+        .to_string(),
+    )?;
+    fs::write(bundle.join("client.js"), "window.__native = true;\n")?;
+    Ok(bundle)
+}
+
+async fn install_active(
+    client: &reqwest::Client,
+    base: &str,
+    source: String,
+) -> Result<serde_json::Value> {
+    let install: serde_json::Value = client
+        .post(format!("{base}/install"))
+        .json(&serde_json::json!({ "source": source }))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    let name = install["name"]
+        .as_str()
+        .expect("installed name")
+        .to_string();
+    let detail: serde_json::Value = client
+        .get(format!("{base}/{name}"))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    let token = detail["review"]["token"].as_str().unwrap().to_string();
+    client
+        .post(format!("{base}/{name}/trust"))
+        .json(&serde_json::json!({ "token": token }))
+        .send()
+        .await?
+        .error_for_status()?;
+    let enabled: serde_json::Value = client
+        .post(format!("{base}/{name}/enable"))
+        .send()
+        .await?
+        .error_for_status()?
+        .json()
+        .await?;
+    assert_eq!(enabled["state"], "active", "{enabled}");
+    Ok(serde_json::json!({ "name": name, "path": detail["path"] }))
+}
+
+async fn ui(
+    client: &reqwest::Client,
+    base: &str,
+    name: &str,
+    query: &str,
+) -> Result<(u16, serde_json::Value)> {
+    let response = client
+        .get(format!("{base}/{name}/ui?{query}"))
+        .send()
+        .await?;
+    let status = response.status().as_u16();
+    Ok((status, response.json().await?))
+}
+
+async fn mutate(client: &reqwest::Client, url: String) -> Result<(StatusCode, String)> {
+    let response = client.post(url).send().await?;
+    Ok((response.status(), response.text().await?))
+}
+
+fn refusal(status: u16, body: &serde_json::Value) -> (u16, String) {
+    (
+        status,
+        body["error"]["code"].as_str().unwrap_or("").to_string(),
+    )
+}
+
+fn assert_consumer_contract(name: &str, minted: &serde_json::Value, seat: &str, key: &str) {
+    assert_eq!(minted["slot"], seat);
+    assert_eq!(minted["dsh_slot"], key);
+    assert!(SEATS.contains(&minted["slot"].as_str().unwrap()));
+    let key = minted["dsh_slot"].as_str().unwrap();
+    assert!(key.len() <= 128 && key.chars().next().unwrap().is_ascii_alphanumeric());
+    assert!(
+        key.chars()
+            .all(|c| c.is_ascii_alphanumeric() || matches!(c, '.' | '_' | '-'))
+    );
+    let bridge = minted["bridge"].as_object().expect("bridge object");
+    assert_eq!(bridge["kind"], "dsh-client");
+    for (field, value) in bridge {
+        assert!(CONSUMER_BRIDGE_KEYS.contains(&field.as_str()), "{field}");
+        assert!(
+            value
+                .as_str()
+                .is_some_and(|v| !v.is_empty() && v.len() <= 128)
+        );
+    }
+    assert!(bridge.contains_key("dsh_version"));
+    let base = minted["base"].as_str().unwrap();
+    assert!(base.starts_with("http://127.0.0.1:"));
+    assert!(base.ends_with(&format!(
+        "/v1/apps/plugins/{}/ui/",
+        urlencoding::encode(name)
+    )));
+    let entry = minted["entry"].as_str().unwrap();
+    assert!(!entry.is_empty() && entry.len() <= 512 && !entry.contains(".."));
+    assert!(
+        minted["revision"]
+            .as_str()
+            .is_some_and(|r| r.starts_with('"'))
+    );
+}
+
+fn bootstrap_loads_in_node(source: &str) -> Option<String> {
+    let dir = tempfile::tempdir().ok()?;
+    let script = dir.path().join("run.js");
+    let harness = format!(
+        "var captured;\nvar window = {{ __ModuleLoader__: {{ load: function (r) {{ captured = r; }} }} }};\n{source}\nvar mod = captured.factory(function (id) {{ return {{ id: id }}; }});\nprocess.stdout.write(JSON.stringify({{ id: captured.id, apply: typeof mod.apply, out: mod.apply('ctx') }}));\n"
+    );
+    fs::write(&script, harness).ok()?;
+    let output = std::process::Command::new("node")
+        .arg(&script)
+        .output()
+        .ok()?;
+    assert!(
+        output.status.success(),
+        "the served bootstrap failed under node: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+    Some(String::from_utf8_lossy(&output.stdout).into_owned())
+}
+
+#[tokio::test]
+async fn plugin_ui_dsh_client_serves_admitted_seats_and_denies_and_revokes() -> Result<()> {
+    let tmp = tempfile::tempdir()?;
+    let root = tmp.path().join("runtime");
+    let workspace = tmp.path().join("ws");
+    fs::create_dir_all(&root)?;
+    let package = write_dsh_package(tmp.path(), "panel", DSH_CLIENT)?;
+
+    let Some((addr, handle)) = spawn_plugin_api_server(root, workspace).await? else {
+        return Ok(());
+    };
+    let client = codewhale_release::tls::reqwest_client();
+    let base = format!("http://{addr}/v1/apps/plugins");
+    let installed = install_active(&client, &base, format!("dsh:{}", package.display())).await?;
+    let name = installed["name"].as_str().unwrap().to_string();
+
+    let (status, panel) = ui(&client, &base, &name, "slot=workpane.panel").await?;
+    assert_eq!(status, 200, "{panel}");
+    assert_consumer_contract(&name, &panel, "workpane.panel", "sidebar.right.pane.tab");
+    assert_eq!(panel["entry"], "__codewhale_dsh_bootstrap.js");
+    let (status, detail) = ui(&client, &base, &name, "slot=customize.plugins.detail").await?;
+    assert_eq!(status, 200, "{detail}");
+    assert_consumer_contract(
+        &name,
+        &detail,
+        "customize.plugins.detail",
+        "settings.section",
+    );
+    let (status, explicit) = ui(
+        &client,
+        &base,
+        &name,
+        "slot=workpane.panel&dsh_slot=sidebar.right.pane.tab",
+    )
+    .await?;
+    assert_eq!(status, 200, "{explicit}");
+
+    for (query, expected) in [
+        ("slot=sidebar.section", (404, "plugin_ui_seat_not_admitted")),
+        ("slot=command.row", (404, "plugin_ui_seat_not_admitted")),
+        (
+            "slot=workpane.panel&dsh_slot=main.page-menu",
+            (404, "plugin_ui_seat_not_admitted"),
+        ),
+        (
+            "slot=workpane.panel&dsh_slot=settings.section",
+            (404, "plugin_ui_seat_not_admitted"),
+        ),
+        (
+            "slot=workpane.panel&dsh_slot=conversation.session.header.utilities",
+            (422, "plugin_ui_seat_unsupported"),
+        ),
+        ("slot=chat.node", (400, "plugin_ui_seat_unknown")),
+        ("dsh_slot=settings.section", (400, "plugin_ui_seat_unknown")),
+        (
+            "slot=workpane.panel&dsh_slot=..%2Fx",
+            (400, "plugin_ui_dsh_slot_invalid"),
+        ),
+    ] {
+        let (status, body) = ui(&client, &base, &name, query).await?;
+        let (status, code) = refusal(status, &body);
+        assert_eq!((status, code.as_str()), expected, "{query}: {body}");
+        assert!(
+            CONSUMER_REFUSALS.contains(&(status, code.as_str()))
+                || code == "plugin_ui_dsh_slot_invalid",
+            "{query}"
+        );
+    }
+
+    let revision = panel["revision"].as_str().unwrap().to_string();
+    let asset_url = format!(
+        "{}{}",
+        panel["base"].as_str().unwrap(),
+        panel["entry"].as_str().unwrap()
+    );
+    let served = client
+        .get(&asset_url)
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert_eq!(served.status(), StatusCode::OK);
+    assert!(
+        served
+            .headers()
+            .get("content-type")
+            .and_then(|v| v.to_str().ok())
+            .is_some_and(|v| v.starts_with("text/javascript"))
+    );
+    let bootstrap = served.text().await?;
+    assert!(bootstrap.contains("\"source/lib/util.js\""));
+    assert!(!bootstrap.contains("Bearer"));
+    match bootstrap_loads_in_node(&bootstrap) {
+        Some(out) => {
+            let out: serde_json::Value = serde_json::from_str(&out)?;
+            assert_eq!(out["apply"], "function");
+            assert_eq!(out["out"][0]["id"], "react");
+            assert_eq!(out["out"][1], 1);
+        }
+        None => eprintln!("node is unavailable; the bootstrap execution check was skipped"),
+    }
+
+    let asset_base = panel["base"].as_str().unwrap().to_string();
+    let missing = client.get(&asset_url).send().await?;
+    assert_eq!(missing.status(), StatusCode::PRECONDITION_REQUIRED);
+    let wrong = client
+        .get(&asset_url)
+        .header("If-Match", "\"not-a-revision\"")
+        .send()
+        .await?;
+    assert_eq!(wrong.status(), StatusCode::PRECONDITION_FAILED);
+    for outside in [
+        "package.json",
+        "source/package.json",
+        "source/lib/index.cjs",
+        "source/lib/util.js",
+    ] {
+        let response = client
+            .get(format!("{asset_base}{outside}"))
+            .header("If-Match", &revision)
+            .send()
+            .await?;
+        assert_eq!(response.status(), StatusCode::NOT_FOUND, "{outside}");
+        let body: serde_json::Value = response.json().await?;
+        assert_eq!(body["error"]["code"], "plugin_ui_file_not_reviewed");
+    }
+    let traversal = client
+        .get(format!("{asset_base}%2e%2e/%2e%2e/etc/passwd"))
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert!(traversal.status().is_client_error());
+
+    let route = format!("{base}/{name}/routes/api/state");
+    let routed = client
+        .post(&route)
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert_eq!(routed.status(), StatusCode::NOT_IMPLEMENTED);
+    let body: serde_json::Value = routed.json().await?;
+    assert_eq!(body["error"]["code"], "plugin_route_not_served");
+    assert_eq!(
+        client.post(&route).send().await?.status(),
+        StatusCode::PRECONDITION_REQUIRED
+    );
+    assert_eq!(
+        client
+            .post(&route)
+            .header("If-Match", "\"not-a-revision\"")
+            .send()
+            .await?
+            .status(),
+        StatusCode::PRECONDITION_FAILED
+    );
+    assert_eq!(
+        client
+            .post(format!("{base}/other/routes/api/state"))
+            .header("If-Match", &revision)
+            .send()
+            .await?
+            .status(),
+        StatusCode::PRECONDITION_FAILED
+    );
+    assert!(
+        client
+            .post(format!("{base}/{name}/routes/%2e%2e/x"))
+            .header("If-Match", &revision)
+            .send()
+            .await?
+            .status()
+            .is_client_error()
+    );
+
+    let (status, body) = mutate(&client, format!("{base}/{name}/disable")).await?;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    for url in [&asset_url, &route] {
+        let response = client.get(url).header("If-Match", &revision).send().await?;
+        assert_eq!(response.status(), StatusCode::PRECONDITION_FAILED, "{url}");
+    }
+    let (status, body) = mutate(&client, format!("{base}/{name}/enable")).await?;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    let stale = client
+        .get(&asset_url)
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert_eq!(stale.status(), StatusCode::PRECONDITION_FAILED);
+
+    let (status, again) = ui(&client, &base, &name, "slot=workpane.panel").await?;
+    assert_eq!(status, 200, "{again}");
+    let again_revision = again["revision"].as_str().unwrap().to_string();
+    assert_ne!(again_revision, revision);
+    let staged = PathBuf::from(installed["path"].as_str().unwrap()).join("source/lib/util.js");
+    let live = client
+        .get(&asset_url)
+        .header("If-Match", &again_revision)
+        .send()
+        .await?;
+    assert_eq!(live.status(), StatusCode::OK);
+    fs::write(&staged, "exports.v = 2;\n")?;
+    let tampered = client
+        .get(&asset_url)
+        .header("If-Match", &again_revision)
+        .send()
+        .await?;
+    assert_eq!(tampered.status(), StatusCode::PRECONDITION_FAILED);
+
+    handle.abort();
+    Ok(())
+}
+
+#[tokio::test]
+async fn plugin_ui_dsh_client_with_unprovided_modules_or_ambient_dependencies_is_unsupported()
+-> Result<()> {
+    let tmp = tempfile::tempdir()?;
+    let root = tmp.path().join("runtime");
+    let workspace = tmp.path().join("ws");
+    fs::create_dir_all(&root)?;
+    let host_module = write_dsh_package(
+        tmp.path(),
+        "hostmod",
+        "require(\"@deepseek-ai/dsh-client-ui-primitives\");\nconst k = \"sidebar.right.pane.tab\";\n",
+    )?;
+    let esm = write_dsh_package(
+        tmp.path(),
+        "esm",
+        "const k = \"sidebar.right.pane.tab\";\nexport const apply = () => k;\n",
+    )?;
+    let ambient = write_dsh_package(
+        tmp.path(),
+        "ambient",
+        "require(\"left-pad\");\nconst k = \"sidebar.right.pane.tab\";\n",
+    )?;
+
+    let Some((addr, handle)) = spawn_plugin_api_server(root, workspace).await? else {
+        return Ok(());
+    };
+    let client = codewhale_release::tls::reqwest_client();
+    let base = format!("http://{addr}/v1/apps/plugins");
+    for package in [host_module, esm, ambient] {
+        let installed =
+            install_active(&client, &base, format!("dsh:{}", package.display())).await?;
+        let name = installed["name"].as_str().unwrap();
+        let (status, body) = ui(&client, &base, name, "slot=workpane.panel").await?;
+        assert_eq!(
+            refusal(status, &body),
+            (400, "plugin_ui_unsupported".to_string()),
+            "{name}: {body}"
+        );
+    }
+    handle.abort();
+    Ok(())
+}
+
+#[tokio::test]
+async fn plugin_ui_native_client_serves_only_the_detail_seat_and_is_revoked() -> Result<()> {
+    let tmp = tempfile::tempdir()?;
+    let root = tmp.path().join("runtime");
+    let workspace = tmp.path().join("ws");
+    fs::create_dir_all(&root)?;
+    let bundle = write_native_ui_bundle(tmp.path(), "nativeui")?;
+
+    let Some((addr, handle)) = spawn_plugin_api_server(root.clone(), workspace.clone()).await?
+    else {
+        return Ok(());
+    };
+    let client = codewhale_release::tls::reqwest_client();
+    let base = format!("http://{addr}/v1/apps/plugins");
+    let installed = install_active(&client, &base, format!("path:{}", bundle.display())).await?;
+    let name = installed["name"].as_str().unwrap().to_string();
+    let recorded =
+        isolated_plugin_discovery(&root, &workspace).inspect_registry_for_workspace(&workspace);
+    let by_app = codewhale_plugins::host_services::PluginApprover::person(
+        codewhale_plugins::host_services::PersonVia::App,
+    );
+    let plugin = recorded.get(&name).unwrap();
+    assert_eq!(plugin.approved_by.as_ref(), Some(&by_app));
+    assert_eq!(plugin.enabled_by.as_ref(), Some(&by_app));
+
+    let (status, minted) = ui(&client, &base, &name, "slot=customize.plugins.detail").await?;
+    assert_eq!(status, 200, "{minted}");
+    assert!(minted.get("dsh_slot").is_none() && minted.get("bridge").is_none());
+    assert_eq!(minted["entry"], "client.js");
+    for query in [
+        "slot=workpane.panel",
+        "slot=sidebar.section",
+        "slot=customize.plugins.detail&dsh_slot=settings.section",
+    ] {
+        let (status, body) = ui(&client, &base, &name, query).await?;
+        assert_eq!(
+            refusal(status, &body),
+            (404, "plugin_ui_seat_not_admitted".to_string()),
+            "{query}"
+        );
+    }
+
+    let revision = minted["revision"].as_str().unwrap().to_string();
+    let asset = format!("{}client.js", minted["base"].as_str().unwrap());
+    let served = client
+        .get(&asset)
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert_eq!(served.status(), StatusCode::OK);
+    let unlisted = client
+        .get(format!("{}nothing.js", minted["base"].as_str().unwrap()))
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert_eq!(unlisted.status(), StatusCode::NOT_FOUND);
+    let body: serde_json::Value = unlisted.json().await?;
+    assert_eq!(body["error"]["code"], "plugin_ui_file_not_reviewed");
+    let routed = client
+        .post(format!("{base}/{name}/routes/x"))
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert_eq!(routed.status(), StatusCode::FORBIDDEN);
+    let body: serde_json::Value = routed.json().await?;
+    assert_eq!(body["error"]["code"], "plugin_route_not_admitted");
+
+    let (status, body) = mutate(&client, format!("{base}/{name}/revoke")).await?;
+    assert_eq!(status, StatusCode::OK, "{body}");
+    let after = client
+        .get(&asset)
+        .header("If-Match", &revision)
+        .send()
+        .await?;
+    assert_eq!(after.status(), StatusCode::PRECONDITION_FAILED);
+
+    handle.abort();
+    Ok(())
+}
@@ -635,7 +635,7 @@ async fn snapshot_in_owner(
    snapshot_in_runtime(&state.runtime_threads, &state.sessions_dir, id).await
 }

-async fn snapshot_in_runtime(
+pub(super) async fn snapshot_in_runtime(
    runtime: &Arc<RuntimeThreadManager>,
    sessions_dir: &Path,
    id: String,
@@ -18,111 +18,14 @@ use serde::Deserialize;
 use serde_json::{Value, json};
 use std::collections::VecDeque;
 use std::time::Duration;
+use tokio::io::AsyncWriteExt as _;
 use tokio::io::{AsyncBufRead, AsyncWrite};
-use tokio::io::{AsyncBufReadExt as _, AsyncWriteExt as _};
 use tokio_util::sync::CancellationToken;

-#[derive(Debug, thiserror::Error)]
-pub enum FrameRefusal {
-    #[error("control frame exceeds the 8 MiB transport limit")]
-    TooLarge,
-    #[error("control frame is not UTF-8")]
-    InvalidUtf8,
-}
+pub use codewhale_util::bounded_lines::{BoundedLines, FrameRefusal, is_frame_refusal};

-pub fn is_frame_refusal(error: &std::io::Error) -> bool {
-    error
-        .get_ref()
-        .is_some_and(|source| source.is::<FrameRefusal>())
-}
-
-/// Cancellation-safe, allocation-bounded newline framing shared by every
-/// local control transport. Consumed partial bytes remain owned by the reader.
-pub struct BoundedLines<R> {
-    reader: R,
-    pub(crate) pending: Vec<u8>,
-    discarding: bool,
-}
-
-impl<R: AsyncBufRead + Unpin> BoundedLines<R> {
-    pub fn new(reader: R) -> Self {
-        Self {
-            reader,
-            pending: Vec::new(),
-            discarding: false,
-        }
-    }
-
-    pub fn into_inner(self) -> R {
-        self.reader
-    }
-    pub async fn next_line(&mut self) -> std::io::Result<Option<String>> {
-        loop {
-            let available = self.reader.fill_buf().await?;
-            if available.is_empty() {
-                self.discarding = false;
-                if self.pending.is_empty() {
-                    return Ok(None);
-                }
-                if self.pending.len() > MAX_RUNTIME_IMAGE_BODY_BYTES {
-                    self.pending.clear();
-                    return Err(std::io::Error::new(
-                        std::io::ErrorKind::InvalidData,
-                        FrameRefusal::TooLarge,
-                    ));
-                }
-                let bytes = std::mem::take(&mut self.pending);
-                return String::from_utf8(bytes).map(Some).map_err(|_| {
-                    std::io::Error::new(std::io::ErrorKind::InvalidData, FrameRefusal::InvalidUtf8)
-                });
-            }
-            let available = &available[..available.len().min(8192)];
-            let newline = available.iter().position(|&byte| byte == b'\n');
-            let count = newline.unwrap_or(available.len());
-            if self.discarding {
-                self.reader.consume(count + usize::from(newline.is_some()));
-                if newline.is_some() {
-                    self.discarding = false;
-                } else {
-                    tokio::task::yield_now().await;
-                }
-                continue;
-            }
-            if count > (MAX_RUNTIME_IMAGE_BODY_BYTES + 1).saturating_sub(self.pending.len()) {
-                self.pending.clear();
-                self.reader.consume(count + usize::from(newline.is_some()));
-                self.discarding = newline.is_none();
-                return Err(std::io::Error::new(
-                    std::io::ErrorKind::InvalidData,
-                    FrameRefusal::TooLarge,
-                ));
-            }
-            // Do not let Vec's geometric growth double an almost-full frame.
-            self.pending.reserve_exact(count);
-            self.pending.extend_from_slice(&available[..count]);
-            self.reader.consume(count + usize::from(newline.is_some()));
-            if self.pending.len() > MAX_RUNTIME_IMAGE_BODY_BYTES
-                && self.pending.last() != Some(&b'\r')
-            {
-                self.pending.clear();
-                self.discarding = newline.is_none();
-                return Err(std::io::Error::new(
-                    std::io::ErrorKind::InvalidData,
-                    FrameRefusal::TooLarge,
-                ));
-            }
-            if newline.is_some() {
-                if self.pending.last() == Some(&b'\r') {
-                    self.pending.pop();
-                }
-                let bytes = std::mem::take(&mut self.pending);
-                return String::from_utf8(bytes).map(Some).map_err(|_| {
-                    std::io::Error::new(std::io::ErrorKind::InvalidData, FrameRefusal::InvalidUtf8)
-                });
-            }
-        }
-    }
-}
+const _: () =
+    assert!(codewhale_util::bounded_lines::MAX_FRAME_BYTES == MAX_RUNTIME_IMAGE_BODY_BYTES);

 /// The stdio JSON-RPC loop, generic over its transport so it can be driven by
 /// a duplex pipe in tests rather than the process's real stdin/stdout.
@@ -31,37 +31,6 @@ async fn control_framing_accepts_exact_limit_crlf_and_preserves_next_frame() {
    assert!(reader.next_line().await.unwrap().is_none());
 }

-#[tokio::test]
-async fn control_framing_refuses_oversize_before_retaining_extra_bytes() {
-    let input = vec![b'x'; MAX_RUNTIME_IMAGE_BODY_BYTES + 4096];
-    let mut reader = BoundedLines::new(BufReader::with_capacity(8192, input.as_slice()));
-    assert_eq!(
-        reader.next_line().await.unwrap_err().kind(),
-        std::io::ErrorKind::InvalidData
-    );
-    assert!(reader.pending.len() <= MAX_RUNTIME_IMAGE_BODY_BYTES + 1);
-    assert!(reader.pending.capacity() <= MAX_RUNTIME_IMAGE_BODY_BYTES + 1);
-}
-
-#[tokio::test]
-async fn control_framing_keeps_consumed_prefix_when_read_future_is_cancelled() {
-    let (mut input, output) = tokio::io::duplex(64);
-    input.write_all(b"partial").await.unwrap();
-    let mut reader = BoundedLines::new(BufReader::new(output));
-    std::future::poll_fn(|cx| {
-        let mut read = std::pin::pin!(reader.next_line());
-        assert!(std::future::Future::poll(read.as_mut(), cx).is_pending());
-        std::task::Poll::Ready(())
-    })
-    .await;
-    assert_eq!(reader.pending, b"partial");
-    input.write_all(b"-continued\n").await.unwrap();
-    assert_eq!(
-        reader.next_line().await.unwrap().as_deref(),
-        Some("partial-continued")
-    );
-}
-
 #[tokio::test]
 async fn control_framing_rejects_non_utf8_and_keeps_eof_line_contract() {
    let mut invalid = BoundedLines::new(BufReader::new(&b"\xff\n"[..]));
@@ -0,0 +1,306 @@
+mod acp_support;
+#[path = "../../engine/tests/support/acp_conformance.rs"]
+mod conformance;
+
+use acp_support::{Client, fixture_config, text_of, updates};
+use agent_client_protocol_schema::ProtocolVersion;
+use agent_client_protocol_schema::v1 as acp;
+use anyhow::{Result, anyhow};
+use codewhale_app_server::acp_server::capture_frontend;
+use codewhale_engine::llm_client::mock::{MockLlmClient, canned};
+use codewhale_engine::runtime_threads::manager::{
+    RuntimeThreadManager, RuntimeThreadManagerConfig,
+};
+use conformance::{Allowed, Conformance, Side};
+use serde::Serialize;
+use serde_json::{Value, json};
+use std::sync::Arc;
+use std::time::Duration;
+use tokio::io::{AsyncWriteExt, BufReader};
+
+const KNOWN: &[Allowed] = &[Allowed {
+    side: Side::Agent,
+    frame: "session/load response",
+    problem: "field `.sessionId` is not in the official type",
+    reason: "session/load keeps the session/new body with its root sessionId through the 0.10.3 tag; official LoadSessionResponse has no sessionId",
+}];
+
+fn wire<T: Serialize>(value: T) -> Value {
+    serde_json::to_value(value).expect("official type serializes")
+}
+
+async fn prompt_to_end(
+    client: &mut Client,
+    params: Value,
+    answer: Value,
+) -> Result<(Value, Vec<Value>)> {
+    client.next_id += 1;
+    let id = client.next_id;
+    client
+        .send(json!({"jsonrpc":"2.0","id":id,"method":"session/prompt","params":params}))
+        .await?;
+    let mut frames = Vec::new();
+    loop {
+        let frame = client.recv().await?;
+        if frame["id"] == json!(id) && frame.get("method").is_none() {
+            return Ok((frame, frames));
+        }
+        if frame["method"] == "session/request_permission" {
+            client
+                .send(json!({"jsonrpc":"2.0","id":frame["id"],"result":answer}))
+                .await?;
+        }
+        frames.push(frame);
+    }
+}
+
+#[test]
+fn every_frame_the_acp_server_writes_is_an_official_v1_shape() -> Result<()> {
+    std::thread::Builder::new()
+        .stack_size(64 << 20)
+        .spawn(|| {
+            tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()?
+                .block_on(async {
+                    tokio::time::timeout(Duration::from_secs(120), journey())
+                        .await
+                        .map_err(|_| anyhow!("conformance journey exceeded 120s"))?
+                })
+        })?
+        .join()
+        .map_err(|_| anyhow!("conformance journey thread panicked"))?
+}
+
+async fn journey() -> Result<()> {
+    let dir = tempfile::tempdir()?;
+    let _home = codewhale_engine::test_support::SealedHome::at(dir.path());
+    let workspace = dir.path().join("workspace");
+    std::fs::create_dir(&workspace)?;
+    let runtime_dir = dir.path().join("runtime");
+    let config = fixture_config();
+    let plugins = Arc::new(codewhale_plugins::PluginRegistry::empty(&workspace));
+    let manager = Arc::new(RuntimeThreadManager::open_host(
+        config.clone(),
+        workspace.clone(),
+        RuntimeThreadManagerConfig {
+            mcp_auth_context: Default::default(),
+            data_dir: runtime_dir.clone(),
+            task_data_dir: runtime_dir,
+            sessions_dir: None,
+            max_active_threads: 4,
+        },
+        plugins,
+        codewhale_engine::core::engine::EngineHostProfile::Acp,
+        None,
+        None,
+    )?);
+    let provider = Arc::new(MockLlmClient::new(vec![
+        canned::tool_call_turn(
+            "plan-call",
+            "todo_write",
+            r#"{"todos":[{"content":"write the file","status":"in_progress"}]}"#,
+        ),
+        canned::tool_call_turn(
+            "write-call",
+            "write",
+            r#"{"path":"allowed.txt","content":"approved"}"#,
+        ),
+        canned::simple_text_turn("settled after approval"),
+        canned::tool_call_turn(
+            "cancel-call",
+            "write",
+            r#"{"path":"cancelled.txt","content":"never"}"#,
+        ),
+        canned::simple_text_turn("unused"),
+    ]));
+    manager.set_test_model_client(provider.clone());
+    let sessions_dir = codewhale_engine::session_manager::default_sessions_dir()?;
+    let frontend = capture_frontend(
+        config,
+        "fixture-model".into(),
+        workspace.clone(),
+        Arc::clone(&manager),
+        sessions_dir,
+        None,
+        None,
+    )?;
+    let mut observed = Conformance::checking(&[Side::Agent]);
+
+    let (mut client, agent_read, agent_write) = Client::connect(true);
+    let first_connection =
+        frontend.serve(Box::new(BufReader::new(agent_read)), Box::new(agent_write));
+    let first_script = async {
+        let result = async {
+            let (initialized, _) = client
+                .request(
+                    "initialize",
+                    wire(
+                        acp::InitializeRequest::new(ProtocolVersion::V1)
+                            .client_capabilities(
+                                acp::ClientCapabilities::new()
+                                    .fs(acp::FileSystemCapabilities::new())
+                                    .terminal(false),
+                            )
+                            .client_info(acp::Implementation::new("conformance", "1.0.0")),
+                    ),
+                )
+                .await?;
+            assert_eq!(initialized["result"]["protocolVersion"], 1);
+            client
+                .send(json!({"jsonrpc":"2.0","method":"$/cancel_request","params":wire(acp::CancelRequestNotification::new(999_i64))}))
+                .await?;
+            let (unknown, _) = client.request("session/not_a_method", json!({})).await?;
+            assert_eq!(unknown["error"]["code"], -32601);
+            let (invalid, _) = client
+                .request("session/set_mode", json!({"modeId":"agent"}))
+                .await?;
+            assert_eq!(invalid["error"]["code"], -32602);
+            let (relative, _) = client
+                .request("session/new", wire(acp::NewSessionRequest::new("relative/dir")))
+                .await?;
+            assert_eq!(relative["error"]["code"], -32602);
+            let (created, _) = client
+                .request("session/new", wire(acp::NewSessionRequest::new(&workspace)))
+                .await?;
+            let session = created["result"]["sessionId"]
+                .as_str()
+                .ok_or_else(|| anyhow!("session/new returned no sessionId"))?
+                .to_string();
+            let (mode, _) = client
+                .request(
+                    "session/set_mode",
+                    wire(acp::SetSessionModeRequest::new(session.clone(), "agent")),
+                )
+                .await?;
+            assert!(mode.get("result").is_some(), "{mode}");
+            let (option, _) = client
+                .request(
+                    "session/set_config_option",
+                    wire(acp::SetSessionConfigOptionRequest::new(
+                        session.clone(),
+                        "model",
+                        "fixture-model",
+                    )),
+                )
+                .await?;
+            assert!(option.get("result").is_some(), "{option}");
+            let (image, _) = client
+                .request(
+                    "session/prompt",
+                    wire(acp::PromptRequest::new(
+                        session.clone(),
+                        vec![acp::ContentBlock::Image(acp::ImageContent::new(
+                            "AAAA",
+                            "image/png",
+                        ))],
+                    )),
+                )
+                .await?;
+            assert_eq!(image["error"]["code"], -32602);
+            let allow = wire(acp::RequestPermissionResponse::new(
+                acp::RequestPermissionOutcome::Selected(acp::SelectedPermissionOutcome::new(
+                    "allow-once",
+                )),
+            ));
+            let (done, frames) = prompt_to_end(
+                &mut client,
+                wire(acp::PromptRequest::new(
+                    session.clone(),
+                    vec![acp::ContentBlock::Text(acp::TextContent::new(
+                        "plan, then write under Ask",
+                    ))],
+                )),
+                allow,
+            )
+            .await?;
+            assert_eq!(done["result"]["stopReason"], "end_turn");
+            assert!(!updates(&frames, "tool_call").is_empty());
+            assert_eq!(text_of(&frames, "agent_message_chunk"), "settled after approval");
+
+            client.next_id += 1;
+            let cancel_id = client.next_id;
+            client
+                .send(json!({"jsonrpc":"2.0","id":cancel_id,"method":"session/prompt","params":wire(acp::PromptRequest::new(
+                    session.clone(),
+                    vec![acp::ContentBlock::Text(acp::TextContent::new("write then cancel"))],
+                ))}))
+                .await?;
+            let (permission, _) = client.until_permission().await?;
+            client
+                .send(json!({"jsonrpc":"2.0","method":"session/cancel","params":wire(acp::CancelNotification::new(session.clone()))}))
+                .await?;
+            client
+                .send(json!({"jsonrpc":"2.0","id":permission["id"],"result":wire(acp::RequestPermissionResponse::new(acp::RequestPermissionOutcome::Cancelled))}))
+                .await?;
+            let (cancelled, _) = client.until_response(cancel_id).await?;
+            assert_eq!(cancelled["result"]["stopReason"], "cancelled");
+            let (listed, _) = client
+                .request(
+                    "session/list",
+                    wire(acp::ListSessionsRequest::new().cwd(workspace.clone())),
+                )
+                .await?;
+            assert!(listed["result"]["sessions"].is_array());
+            Ok::<_, anyhow::Error>(session)
+        }
+        .await;
+        let _ = client.write.shutdown().await;
+        result
+    };
+    let (served, session) = tokio::join!(first_connection, first_script);
+    served?;
+    let session = session?;
+    for (sent, frame) in client.log.take().unwrap_or_default() {
+        observed.observe(if sent { Side::Client } else { Side::Agent }, &frame);
+    }
+
+    let (mut client, agent_read, agent_write) = Client::connect(true);
+    let second_connection =
+        frontend.serve(Box::new(BufReader::new(agent_read)), Box::new(agent_write));
+    let second_script = async {
+        let result = async {
+            client
+                .request(
+                    "initialize",
+                    wire(acp::InitializeRequest::new(ProtocolVersion::V1)),
+                )
+                .await?;
+            let (missing, _) = client
+                .request(
+                    "session/load",
+                    wire(acp::LoadSessionRequest::new("no-such-session", &workspace)),
+                )
+                .await?;
+            assert_eq!(missing["error"]["code"], -32602);
+            let (loaded, replay) = client
+                .request(
+                    "session/load",
+                    wire(acp::LoadSessionRequest::new(session.clone(), &workspace)),
+                )
+                .await?;
+            assert!(loaded.get("result").is_some(), "{loaded}");
+            assert!(text_of(&replay, "user_message_chunk").contains("plan, then write under Ask"));
+            assert!(!updates(&replay, "tool_call_update").is_empty());
+            Ok::<_, anyhow::Error>(())
+        }
+        .await;
+        let _ = client.write.shutdown().await;
+        result
+    };
+    let (served, script) = tokio::join!(second_connection, second_script);
+    served?;
+    script?;
+    for (sent, frame) in client.log.take().unwrap_or_default() {
+        observed.observe(if sent { Side::Client } else { Side::Agent }, &frame);
+    }
+    manager.shutdown_and_wait().await?;
+
+    assert!(
+        observed.frames() > 20,
+        "only {} frames observed",
+        observed.frames()
+    );
+    observed.assert_only(KNOWN);
+    Ok(())
+}
@@ -0,0 +1,499 @@
+mod acp_support;
+
+use acp_support::{Client, fixture_config, text_of, updates};
+use anyhow::{Result, anyhow};
+use codewhale_app_server::acp_server::capture_frontend;
+use codewhale_engine::llm_client::mock::{MockLlmClient, canned};
+use codewhale_engine::runtime_threads::RuntimeTurnStatus;
+use codewhale_engine::runtime_threads::manager::{
+    RuntimeThreadManager, RuntimeThreadManagerConfig,
+};
+use serde_json::{Value, json};
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::Duration;
+use tokio::io::{AsyncWriteExt, BufReader};
+
+#[test]
+fn editor_drives_a_session_through_permission_cancel_and_load() -> Result<()> {
+    std::thread::Builder::new()
+        .stack_size(64 << 20)
+        .spawn(|| {
+            tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()?
+                .block_on(async {
+                    tokio::time::timeout(Duration::from_secs(120), journey())
+                        .await
+                        .map_err(|_| anyhow!("journey exceeded 120s"))?
+                })
+        })?
+        .join()
+        .map_err(|_| anyhow!("journey thread panicked"))?
+}
+
+async fn journey() -> Result<()> {
+    let dir = tempfile::tempdir()?;
+    let _home = codewhale_engine::test_support::SealedHome::at(dir.path());
+    let workspace = dir.path().join("workspace");
+    std::fs::create_dir(&workspace)?;
+    let runtime_dir = dir.path().join("runtime");
+    let config = fixture_config();
+    let plugins = Arc::new(codewhale_plugins::PluginRegistry::empty(&workspace));
+    let manager = Arc::new(RuntimeThreadManager::open_host(
+        config.clone(),
+        workspace.clone(),
+        RuntimeThreadManagerConfig {
+            mcp_auth_context: Default::default(),
+            data_dir: runtime_dir.clone(),
+            task_data_dir: runtime_dir,
+            sessions_dir: None,
+            max_active_threads: 4,
+        },
+        plugins,
+        codewhale_engine::core::engine::EngineHostProfile::Acp,
+        None,
+        None,
+    )?);
+    let provider = Arc::new(MockLlmClient::new(vec![
+        canned::tool_call_turn(
+            "provider-id-not-authority",
+            "write",
+            r#"{"path":"allowed.txt","content":"approved"}"#,
+        ),
+        canned::simple_text_turn("settled after approval"),
+        canned::tool_call_turn(
+            "provider-id-two",
+            "write",
+            r#"{"path":"cancelled.txt","content":"never"}"#,
+        ),
+        canned::simple_text_turn("resumed in the real session"),
+    ]));
+    manager.set_test_model_client(provider.clone());
+    let sessions_dir = codewhale_engine::session_manager::default_sessions_dir()?;
+    let frontend = capture_frontend(
+        config,
+        "fixture-model".into(),
+        workspace.clone(),
+        Arc::clone(&manager),
+        sessions_dir,
+        None,
+        None,
+    )?;
+
+    let (mut client, agent_read, agent_write) = Client::connect(false);
+    let first_connection =
+        frontend.serve(Box::new(BufReader::new(agent_read)), Box::new(agent_write));
+    let first_script = async {
+        let result = async {
+        let (initialized, _) = client
+            .request(
+                "initialize",
+                json!({"protocolVersion":1,"clientCapabilities":{"terminal":false}}),
+            )
+            .await?;
+        let capabilities = &initialized["result"]["agentCapabilities"];
+        assert_eq!(initialized["result"]["protocolVersion"], 1);
+        assert_eq!(capabilities["loadSession"], true);
+        assert_eq!(capabilities["promptCapabilities"]["image"], false);
+        assert_eq!(capabilities["promptCapabilities"]["audio"], false);
+        assert_eq!(capabilities["mcpCapabilities"]["http"], false);
+        assert_eq!(capabilities["mcpCapabilities"]["sse"], false);
+        assert!(capabilities["sessionCapabilities"]["list"].is_object());
+        assert!(capabilities["sessionCapabilities"].get("resume").is_none());
+        let (relative, _) = client
+            .request("session/new", json!({"cwd":"relative/dir"}))
+            .await?;
+        assert_eq!(relative["error"]["code"], -32602);
+        let (mcp, _) = client
+            .request(
+                "session/new",
+                json!({"cwd":workspace,"mcpServers":[{"name":"x","command":"x","args":[],"env":[]}]}),
+            )
+            .await?;
+        assert_eq!(mcp["error"]["code"], -32602);
+        let (resume, _) = client
+            .request("session/resume", json!({"sessionId":"x","cwd":workspace}))
+            .await?;
+        assert_eq!(resume["error"]["code"], -32601);
+        let (created, _) = client
+            .request("session/new", json!({"cwd":workspace}))
+            .await?;
+        let session = created["result"]["sessionId"]
+            .as_str()
+            .ok_or_else(|| anyhow!("session/new returned no sessionId"))?
+            .to_string();
+        let (image, _) = client
+            .request(
+                "session/prompt",
+                json!({"sessionId":session,"prompt":[
+                    {"type":"text","text":"look"},
+                    {"type":"image","data":"AAAA","mimeType":"image/png"}
+                ]}),
+            )
+            .await?;
+        assert_eq!(image["error"]["code"], -32602);
+        assert_eq!(
+            provider.call_count(),
+            0,
+            "a refused prompt never reaches the provider"
+        );
+        client.next_id += 1;
+        let prompt_id = client.next_id;
+        client
+            .send(
+                json!({"jsonrpc":"2.0","id":prompt_id,"method":"session/prompt","params":{
+                "sessionId":session,"prompt":[{"type":"text","text":"write under Ask"}]}}),
+            )
+            .await?;
+        let (permission, before) = client.until_permission().await?;
+        assert_eq!(permission["params"]["sessionId"], session.as_str());
+        assert_eq!(permission["params"]["toolCall"]["kind"], "edit");
+        let kinds: Vec<_> = permission["params"]["options"]
+            .as_array()
+            .unwrap()
+            .iter()
+            .map(|option| option["kind"].as_str().unwrap().to_string())
+            .collect();
+        assert_eq!(kinds, ["allow_once", "reject_once"]);
+        assert!(
+            !updates(&before, "tool_call").is_empty(),
+            "the tool call is announced before approval is requested"
+        );
+        assert!(
+            updates(&before, "tool_call_update")
+                .iter()
+                .all(|frame| frame.pointer("/params/update/status") != Some(&json!("in_progress"))),
+            "nothing dispatches before the person decides"
+        );
+        assert!(!workspace.join("allowed.txt").exists());
+        client
+            .send(json!({"jsonrpc":"2.0","id":permission["id"],
+                "result":{"outcome":{"outcome":"selected","optionId":"allow-once"}}}))
+            .await?;
+        let (done, after) = client.until_response(prompt_id).await?;
+        assert_eq!(done["result"]["stopReason"], "end_turn");
+        assert_eq!(
+            std::fs::read_to_string(workspace.join("allowed.txt"))?,
+            "approved"
+        );
+        assert!(
+            updates(&after, "tool_call_update")
+                .iter()
+                .any(|frame| frame.pointer("/params/update/status") == Some(&json!("completed")))
+        );
+        assert_eq!(
+            text_of(&after, "agent_message_chunk"),
+            "settled after approval"
+        );
+        client.next_id += 1;
+        let cancel_id = client.next_id;
+        client
+            .send(
+                json!({"jsonrpc":"2.0","id":cancel_id,"method":"session/prompt","params":{
+                "sessionId":session,"prompt":"write then cancel"}}),
+            )
+            .await?;
+        let (second, _) = client.until_permission().await?;
+        client
+            .send(json!({"jsonrpc":"2.0","method":"session/cancel","params":{"sessionId":session}}))
+            .await?;
+        client
+            .send(json!({"jsonrpc":"2.0","id":second["id"],
+                "result":{"outcome":{"outcome":"cancelled"}}}))
+            .await?;
+        let (cancelled, _) = client.until_response(cancel_id).await?;
+        assert_eq!(cancelled["result"]["stopReason"], "cancelled");
+        assert!(!workspace.join("cancelled.txt").exists());
+        let (listed, _) = client
+            .request("session/list", json!({"cwd":workspace}))
+            .await?;
+        assert!(
+            listed["result"]["sessions"]
+                .as_array()
+                .unwrap()
+                .iter()
+                .any(|entry| entry["sessionId"] == session.as_str())
+        );
+        client.request("shutdown", json!({})).await?;
+        Ok::<_, anyhow::Error>(session)
+    }
+        .await;
+        if result.is_err() {
+            let _ = client.write.shutdown().await;
+        }
+        result
+    };
+    let (served, session) = tokio::join!(first_connection, first_script);
+    served?;
+    let session = session?;
+
+    let thread = manager
+        .list_threads(Default::default(), None)
+        .await?
+        .into_iter()
+        .next()
+        .ok_or_else(|| anyhow!("no runtime thread was created"))?;
+    let detail = manager.get_thread_detail(&thread.id).await?;
+    assert!(
+        detail.pending_approvals.is_empty(),
+        "cancel settles the approval"
+    );
+    assert_eq!(detail.turns.len(), 2);
+    assert_eq!(detail.turns[0].status, RuntimeTurnStatus::Completed);
+    assert_eq!(detail.turns[1].status, RuntimeTurnStatus::Interrupted);
+
+    let (mut client, agent_read, agent_write) = Client::connect(false);
+    let second_connection =
+        frontend.serve(Box::new(BufReader::new(agent_read)), Box::new(agent_write));
+    let second_script = async {
+        client
+            .request(
+                "initialize",
+                json!({"protocolVersion":1,"clientCapabilities":{}}),
+            )
+            .await?;
+        let (missing, _) = client
+            .request(
+                "session/load",
+                json!({"sessionId":"no-such-session","cwd":workspace,"mcpServers":[]}),
+            )
+            .await?;
+        assert_eq!(missing["error"]["code"], -32602);
+        let (loaded, replay) = client
+            .request(
+                "session/load",
+                json!({"sessionId":session,"cwd":workspace,"mcpServers":[]}),
+            )
+            .await?;
+        assert_eq!(loaded["result"]["sessionId"], session.as_str());
+        assert!(text_of(&replay, "user_message_chunk").contains("write under Ask"));
+        assert!(text_of(&replay, "agent_message_chunk").contains("settled after approval"));
+        assert!(!updates(&replay, "tool_call").is_empty());
+        let (resumed, frames) = client
+            .request(
+                "session/prompt",
+                json!({"sessionId":session,"prompt":"continue"}),
+            )
+            .await?;
+        assert_eq!(resumed["result"]["stopReason"], "end_turn");
+        assert_eq!(
+            text_of(&frames, "agent_message_chunk"),
+            "resumed in the real session"
+        );
+        client.request("shutdown", json!({})).await?;
+        Ok::<_, anyhow::Error>(())
+    };
+    let (served, script) = tokio::join!(second_connection, second_script);
+    served?;
+    script?;
+
+    let requests = provider.captured_requests();
+    let last = serde_json::to_string(requests.last().ok_or_else(|| anyhow!("no model request"))?)?;
+    assert!(
+        last.contains("write under Ask") && last.contains("settled after approval"),
+        "the loaded session continues from its real history"
+    );
+    manager.shutdown_and_wait().await?;
+    Ok(())
+}
+
+const MCP_FIXTURE: &str = r#"import readline from 'node:readline';
+readline.createInterface({input:process.stdin}).on('line', line => {
+  const r = JSON.parse(line); if (r.id === undefined) return;
+  let result = {};
+  if (r.method === 'initialize') result = {protocolVersion:'2024-11-05',capabilities:{tools:{}},serverInfo:{name:'fixture',version:'1'}};
+  if (r.method === 'tools/list') result = {tools:[{name:'echo',description:'Echo text',inputSchema:{type:'object',properties:{text:{type:'string'}},required:['text']}}]};
+  if (r.method === 'tools/call') result = {content:[{type:'text',text:'mcp-echo:' + r.params.arguments.text}]};
+  process.stdout.write(JSON.stringify({jsonrpc:'2.0',id:r.id,result}) + '\n');
+});
+"#;
+
+#[test]
+fn plugin_and_mcp_tools_run_as_acp_tool_calls_through_the_permission_dial() -> Result<()> {
+    std::thread::Builder::new()
+        .stack_size(64 << 20)
+        .spawn(|| {
+            tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()?
+                .block_on(async {
+                    tokio::time::timeout(Duration::from_secs(120), extension_journey())
+                        .await
+                        .map_err(|_| anyhow!("extension journey exceeded 120s"))?
+                })
+        })?
+        .join()
+        .map_err(|_| anyhow!("extension journey thread panicked"))?
+}
+
+async fn extension_journey() -> Result<()> {
+    use codewhale_engine::extension_host::test_support::{FixturePlugins, node_for_tests};
+    let Some(node) = node_for_tests("plugin_and_mcp_tools_run_as_acp_tool_calls") else {
+        return Ok(());
+    };
+    let _policy = codewhale_plugins::activation::TestPolicyGuard::extension_host(true);
+    let fixture = FixturePlugins::new(&["plugin-context"]).await;
+    let host = fixture.manager(node.clone());
+    let _host = codewhale_engine::extension_host::TestManagerGuard::install(Arc::clone(&host));
+    let dir = tempfile::tempdir()?;
+    let _home = codewhale_engine::test_support::SealedHome::at(dir.path());
+    let workspace = fixture.workspace().to_path_buf();
+    let server = dir.path().join("fixture-mcp.mjs");
+    std::fs::write(&server, MCP_FIXTURE)?;
+    let mcp_config = dir.path().join("mcp.json");
+    std::fs::write(
+        &mcp_config,
+        serde_json::to_vec(&json!({"servers":{"fixture":{"command":node,"args":[server]}}}))?,
+    )?;
+    let runtime_dir = dir.path().join("runtime");
+    let mut config = fixture_config();
+    config.set_feature("mcp", true).unwrap();
+    config.set_feature("extension_host", true).unwrap();
+    config.mcp_config_path = Some(mcp_config.to_string_lossy().into_owned());
+    let manager = Arc::new(RuntimeThreadManager::open_host(
+        config.clone(),
+        workspace.clone(),
+        RuntimeThreadManagerConfig {
+            mcp_auth_context: Default::default(),
+            data_dir: runtime_dir.clone(),
+            task_data_dir: runtime_dir,
+            sessions_dir: None,
+            max_active_threads: 4,
+        },
+        fixture.registry(),
+        codewhale_engine::core::engine::EngineHostProfile::Acp,
+        None,
+        None,
+    )?);
+    let provider = Arc::new(MockLlmClient::new(vec![
+        canned::tool_call_turn("plugin-call", "ctx_probe", "{}"),
+        canned::tool_call_turn("mcp-call", "mcp_fixture_echo", r#"{"text":"from-acp"}"#),
+        canned::simple_text_turn("both extension tools ran"),
+    ]));
+    manager.set_test_model_client(provider.clone());
+    let frontend = capture_frontend(
+        config,
+        "fixture-model".into(),
+        workspace.clone(),
+        Arc::clone(&manager),
+        codewhale_engine::session_manager::default_sessions_dir()?,
+        None,
+        None,
+    )?;
+    let (mut client, agent_read, agent_write) = Client::connect(false);
+    let connection = frontend.serve(Box::new(BufReader::new(agent_read)), Box::new(agent_write));
+    let script = async {
+        let result = async {
+            let (initialized, _) = client
+                .request(
+                    "initialize",
+                    json!({"protocolVersion":1,"clientCapabilities":{}}),
+                )
+                .await?;
+            let meta = &initialized["result"]["agentCapabilities"]["_meta"]["codewhale"];
+            assert_eq!(meta["plugins"], true);
+            assert_eq!(meta["configuredMcpServers"], true);
+            assert_eq!(meta["clientMcpServers"], false);
+            let (created, _) = client
+                .request("session/new", json!({"cwd":workspace}))
+                .await?;
+            let session = created["result"]["sessionId"]
+                .as_str()
+                .ok_or_else(|| anyhow!("session/new returned no sessionId"))?
+                .to_string();
+            client.next_id += 1;
+            let prompt_id = client.next_id;
+            client
+                .send(json!({"jsonrpc":"2.0","id":prompt_id,"method":"session/prompt","params":{
+                    "sessionId":session,"prompt":[{"type":"text","text":"use both extension tools"}]}}))
+                .await?;
+            let mut asked = Vec::new();
+            let mut frames = Vec::new();
+            let done = loop {
+                let frame = client.recv().await?;
+                if frame["method"] == "session/request_permission" {
+                    asked.push(
+                        frame["params"]["toolCall"]["title"]
+                            .as_str()
+                            .unwrap_or_default()
+                            .to_string(),
+                    );
+                    client
+                        .send(json!({"jsonrpc":"2.0","id":frame["id"],
+                            "result":{"outcome":{"outcome":"selected","optionId":"allow-once"}}}))
+                        .await?;
+                } else if frame["id"] == json!(prompt_id) && frame.get("method").is_none() {
+                    break frame;
+                } else {
+                    frames.push(frame);
+                }
+            };
+            assert_eq!(done["result"]["stopReason"], "end_turn");
+            assert!(
+                asked.iter().any(|title| title.starts_with("ctx_probe")),
+                "the plugin tool asks through the permission dial: {asked:?} {frames:#?}"
+            );
+            assert!(
+                asked
+                    .iter()
+                    .any(|title| title.starts_with("mcp_fixture_echo")),
+                "the MCP tool asks through the permission dial: {asked:?}"
+            );
+            let announced: Vec<_> = updates(&frames, "tool_call")
+                .iter()
+                .filter_map(|frame| frame.pointer("/params/update/title")?.as_str())
+                .map(str::to_string)
+                .collect();
+            assert!(announced.iter().any(|title| title == "ctx_probe"), "{announced:?}");
+            assert!(
+                announced.iter().any(|title| title == "mcp_fixture_echo"),
+                "{announced:?}"
+            );
+            let completed = updates(&frames, "tool_call_update")
+                .iter()
+                .filter(|frame| {
+                    frame.pointer("/params/update/status") == Some(&json!("completed"))
+                })
+                .count();
+            assert_eq!(completed, 2, "both extension calls complete: {frames:#?}");
+            let rendered = serde_json::to_string(&frames)?;
+            assert!(rendered.contains("mcp-echo:from-acp"), "{rendered}");
+            let probed = updates(&frames, "tool_call_update")
+                .iter()
+                .filter_map(|frame| frame.pointer("/params/update/content/0/content/text"))
+                .filter_map(Value::as_str)
+                .filter_map(|text| serde_json::from_str::<Value>(&text[text.find('{')?..]).ok())
+                .find_map(|result| Some(PathBuf::from(result.get("workspace")?.as_str()?)))
+                .ok_or_else(|| anyhow!("the plugin result did not reach the editor: {rendered}"))?;
+            assert_eq!(probed.canonicalize()?, workspace.canonicalize()?);
+            assert_eq!(
+                text_of(&frames, "agent_message_chunk"),
+                "both extension tools ran"
+            );
+            client.request("shutdown", json!({})).await?;
+            Ok::<_, anyhow::Error>(())
+        }
+        .await;
+        if result.is_err() {
+            let _ = client.write.shutdown().await;
+        }
+        result
+    };
+    let (served, scripted) = tokio::join!(connection, script);
+    served?;
+    scripted?;
+    let first = serde_json::to_string(
+        provider
+            .captured_requests()
+            .first()
+            .ok_or_else(|| anyhow!("no model request"))?,
+    )?;
+    assert!(
+        first.contains("ctx_probe") && first.contains("mcp_fixture_echo"),
+        "the first model request carries both extension tools"
+    );
+    manager.shutdown_and_wait().await?;
+    host.shutdown().await;
+    Ok(())
+}
@@ -0,0 +1,120 @@
+use anyhow::{Result, anyhow};
+use codewhale_runtime::config::{Config, ProviderConfig, ProvidersConfig, SnapshotsConfig};
+use serde_json::{Value, json};
+use std::collections::HashMap;
+use std::time::Duration;
+use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader, DuplexStream, ReadHalf, WriteHalf};
+
+pub const STEP: Duration = Duration::from_secs(30);
+
+pub fn fixture_config() -> Config {
+    let mut config = Config::default();
+    config.provider = Some("acp-fixture".into());
+    config.providers = Some(ProvidersConfig {
+        custom: HashMap::from([(
+            "acp-fixture".into(),
+            ProviderConfig {
+                kind: Some("openai-compatible".into()),
+                base_url: Some("http://127.0.0.1:18181/v1".into()),
+                model: Some("fixture-model".into()),
+                api_key: Some("local-test-key".into()),
+                ..Default::default()
+            },
+        )]),
+        ..Default::default()
+    });
+    config.snapshots = Some(SnapshotsConfig {
+        enabled: false,
+        ..Default::default()
+    });
+    config.set_feature("mcp", false).unwrap();
+    config.set_feature("subagents", false).unwrap();
+    config
+}
+
+pub struct Client {
+    pub lines: tokio::io::Lines<BufReader<ReadHalf<DuplexStream>>>,
+    pub write: WriteHalf<DuplexStream>,
+    pub next_id: u64,
+    pub log: Option<Vec<(bool, Value)>>,
+}
+
+impl Client {
+    pub fn connect(record: bool) -> (Self, ReadHalf<DuplexStream>, WriteHalf<DuplexStream>) {
+        let (client, agent) = tokio::io::duplex(1 << 20);
+        let (agent_read, agent_write) = tokio::io::split(agent);
+        let (client_read, client_write) = tokio::io::split(client);
+        (
+            Client {
+                lines: BufReader::new(client_read).lines(),
+                write: client_write,
+                next_id: 0,
+                log: record.then(Vec::new),
+            },
+            agent_read,
+            agent_write,
+        )
+    }
+    pub async fn send(&mut self, message: Value) -> Result<()> {
+        let mut line = serde_json::to_vec(&message)?;
+        line.push(b'\n');
+        self.write.write_all(&line).await?;
+        self.write.flush().await?;
+        if let Some(log) = &mut self.log {
+            log.push((true, message));
+        }
+        Ok(())
+    }
+    pub async fn recv(&mut self) -> Result<Value> {
+        let line = tokio::time::timeout(STEP, self.lines.next_line())
+            .await
+            .map_err(|_| anyhow!("agent produced no frame within {STEP:?}"))??
+            .ok_or_else(|| anyhow!("agent closed the transport"))?;
+        let frame: Value = serde_json::from_str(&line)?;
+        if let Some(log) = &mut self.log {
+            log.push((false, frame.clone()));
+        }
+        Ok(frame)
+    }
+    pub async fn request(&mut self, method: &str, params: Value) -> Result<(Value, Vec<Value>)> {
+        self.next_id += 1;
+        let id = self.next_id;
+        self.send(json!({"jsonrpc":"2.0","id":id,"method":method,"params":params}))
+            .await?;
+        self.until_response(id).await
+    }
+    pub async fn until_permission(&mut self) -> Result<(Value, Vec<Value>)> {
+        let mut frames = Vec::new();
+        loop {
+            let frame = self.recv().await?;
+            if frame["method"] == "session/request_permission" {
+                return Ok((frame, frames));
+            }
+            frames.push(frame);
+        }
+    }
+    pub async fn until_response(&mut self, id: u64) -> Result<(Value, Vec<Value>)> {
+        let mut frames = Vec::new();
+        loop {
+            let frame = self.recv().await?;
+            if frame["id"] == json!(id) && frame.get("method").is_none() {
+                return Ok((frame, frames));
+            }
+            frames.push(frame);
+        }
+    }
+}
+
+pub fn updates<'a>(frames: &'a [Value], kind: &str) -> Vec<&'a Value> {
+    frames
+        .iter()
+        .filter(|frame| frame.pointer("/params/update/sessionUpdate") == Some(&json!(kind)))
+        .collect()
+}
+
+pub fn text_of(frames: &[Value], kind: &str) -> String {
+    updates(frames, kind)
+        .iter()
+        .filter_map(|frame| frame.pointer("/params/update/content/text")?.as_str())
+        .collect()
+}
@@ -139,6 +139,7 @@ impl BootstrapPublicationFixture {
        if reused {
            process_start.push_str("-different-generation");
        }
+        std::fs::create_dir_all(harness.root.join("runtime")).unwrap();
        let owner = codewhale_protocol::RuntimeOwnerReceipt {
            version: 1,
            data_dir: harness.root.join("runtime"),
@@ -168,6 +169,7 @@ impl BootstrapPublicationFixture {
        match codewhale_app_server::daemon_client::probe_owner_for_host_startup(
            self.owner.config_path.clone(),
            Some(self.owner.socket_path.clone()),
+            &self.owner.data_dir,
        )
        .await
        .unwrap()
@@ -250,12 +252,58 @@ async fn owner_bootstrap_unavailable_is_host_only_and_read_only() {
        fixture.parent.socket_identity("daemon.sock").unwrap(),
        identity
    );
-    assert!(
-        !fixture.owner.data_dir.exists(),
+    assert_eq!(
+        std::fs::read_dir(&fixture.owner.data_dir).unwrap().count(),
+        0,
        "standalone control must not open or mint a store"
    );
 }

+#[tokio::test]
+async fn dead_owner_whose_store_was_deleted_is_discarded_and_startup_proceeds() {
+    let fixture = BootstrapPublicationFixture::new("boot-gone", true, false).await;
+    std::fs::remove_dir(&fixture.owner.data_dir).unwrap();
+    assert!(matches!(
+        codewhale_app_server::daemon_client::probe_owner_for_host_startup(
+            fixture.owner.config_path.clone(),
+            Some(fixture.owner.socket_path.clone()),
+            &fixture.harness.root.join("another-store"),
+        )
+        .await
+        .unwrap(),
+        codewhale_app_server::daemon_client::HostOwnerProbe::Unavailable(_)
+    ));
+    fixture.assert_publication(&fixture.bytes);
+    let probe = codewhale_app_server::daemon_client::probe_owner_for_host_startup(
+        fixture.owner.config_path.clone(),
+        Some(fixture.owner.socket_path.clone()),
+        &fixture.owner.data_dir,
+    )
+    .await
+    .unwrap();
+    assert!(matches!(
+        probe,
+        codewhale_app_server::daemon_client::HostOwnerProbe::Absent
+    ));
+    assert!(
+        fixture
+            .parent
+            .read_private_receipt("daemon.sock.owner.json", 16384)
+            .unwrap()
+            .is_none()
+    );
+    assert!(!fixture.owner.data_dir.exists());
+    fixture.bind_replacement(None).await.unwrap();
+}
+
+#[tokio::test]
+async fn live_owner_with_a_missing_store_is_never_discarded() {
+    let fixture = BootstrapPublicationFixture::new("boot-gone-live", false, false).await;
+    std::fs::remove_dir(&fixture.owner.data_dir).unwrap();
+    fixture.capture().await;
+    fixture.assert_publication(&fixture.bytes);
+}
+
 #[tokio::test]
 async fn owner_bootstrap_live_process_and_reused_pid_refuse_retirement() {
    for reused in [false, true] {
@@ -265,17 +265,16 @@ Common forwarded flags:
  --output-format <FORMAT>         Output format: text or stream-json
  --hooks                          Opt in to configured hooks (tool_call_before, shell_env)

-Plain `codewhale exec` is a one-shot model response: one Engine turn with the
-same system prompt as every other run, and no tools. Use `--auto` for
-non-interactive agent-with-tools execution. Tools are offered only with
-`--auto`, `--yolo`, `--allowed-tools`, or when resuming a session; limits such
-as `--max-turns`, `--disallowed-tools` or `--sandbox`, and the output format,
-never add tools. A reply cut off at the provider's output limit is continued
-in the same turn, at most 8 model steps unless `--max-turns` says otherwise.
+Plain `codewhale exec` runs the agent with the normal tool surface under the
+configured sandbox and approval posture. Use `--no-tools` for one answer with
+no tools. `--auto` selects automatic approvals and Full Access by default. A
+reply cut off at the provider's output limit is continued in the same turn, at
+most 8 model steps unless `--max-turns` says otherwise.
 --auto defaults to Full Access: no shell sandbox and trust mode on. Use --sandbox workspace-write to keep the shell sandbox and file-tool workspace restrictions; stricter configured policies also apply. A denied sandbox retry requires --allow-sandbox-elevation or --sandbox danger-full-access.
 Any --sandbox other than danger-full-access (or an equivalent sandbox_mode in config) disables trust mode.
-Runs that offer tools, stream-json runs, and resumed sessions are saved for codewhale sessions, exec --continue, and codewhale receipts <id>. Plain answer-only text/--json runs are not saved unless compaction needs recovery.
+Runs that offer tools, stream-json runs, and resumed sessions are saved for codewhale sessions, exec --continue, and codewhale receipts <id>. Answer-only (--no-tools) text/--json runs are not saved unless compaction needs recovery.
 Put flags before the prompt. Put -- before a prompt starting with - or containing literal exec flags.
+Piped stdin is the prompt when no prompt argument is given, or is appended to it; with a prompt argument, stdin that sends nothing for 2 seconds is ignored with a note on stderr.
 ")]
    Exec(TuiPassthroughArgs),
    /// Manage durable Agent fleet runs.
@@ -425,6 +425,74 @@ pub struct RuntimeRequestStats {
    pub provider_reported_output_tokens: u64,
 }

+#[derive(Debug, Default, serde::Serialize)]
+pub struct SessionUsageStats {
+    pub sessions: u64,
+    pub usage_receipts: u64,
+    pub usage_receipts_incomplete: u64,
+    pub provider_reported_input_tokens: u64,
+    pub provider_reported_output_tokens: u64,
+    pub sessions_with_total_tokens_only: u64,
+    pub total_tokens_only: u64,
+}
+
+fn record_session_usage(v: &Value, rollup: &mut Rollup) {
+    let Some(sources) = v
+        .pointer("/metadata/cost/accounted_usage_sources")
+        .and_then(Value::as_object)
+    else {
+        let total = v
+            .pointer("/metadata/total_tokens")
+            .and_then(Value::as_u64)
+            .unwrap_or(0);
+        if total > 0 {
+            let stats = &mut rollup.session_usage;
+            stats.sessions_with_total_tokens_only =
+                stats.sessions_with_total_tokens_only.saturating_add(1);
+            stats.total_tokens_only = stats.total_tokens_only.saturating_add(total);
+        }
+        return;
+    };
+    let stats = &mut rollup.session_usage;
+    let mut counted = false;
+    for contribution in sources.values() {
+        let record = contribution.get("record");
+        let reported = match record
+            .and_then(|record| record.pointer("/settlement/coverage"))
+            .and_then(Value::as_str)
+        {
+            Some(coverage) => matches!(coverage, "reported" | "incomplete"),
+            None => record
+                .and_then(|record| record.pointer("/usage/usage"))
+                .is_some_and(|usage| {
+                    usage.get("input_tokens").and_then(Value::as_u64) != Some(0)
+                        || usage.get("output_tokens").and_then(Value::as_u64) != Some(0)
+                }),
+        };
+        if !reported {
+            continue;
+        }
+        let tokens = |name: &str| {
+            record
+                .and_then(|record| record.pointer(&format!("/usage/usage/{name}")))
+                .and_then(Value::as_u64)
+        };
+        let (Some(input), Some(output)) = (tokens("input_tokens"), tokens("output_tokens")) else {
+            stats.usage_receipts_incomplete = stats.usage_receipts_incomplete.saturating_add(1);
+            continue;
+        };
+        stats.usage_receipts = stats.usage_receipts.saturating_add(1);
+        stats.provider_reported_input_tokens =
+            stats.provider_reported_input_tokens.saturating_add(input);
+        stats.provider_reported_output_tokens =
+            stats.provider_reported_output_tokens.saturating_add(output);
+        counted = true;
+    }
+    if counted {
+        stats.sessions = stats.sessions.saturating_add(1);
+    }
+}
+
 /// Top-level rollup.
 #[derive(Debug, Default, serde::Serialize)]
 pub struct Rollup {
@@ -445,6 +513,7 @@ pub struct Rollup {
    pub capacity: CapacityStats,
    pub credentials: CredentialStats,
    pub runtime_requests: RuntimeRequestStats,
+    pub session_usage: SessionUsageStats,
    /// Total lines read across all sources.
    pub total_lines: u64,
    /// Lines successfully parsed.
@@ -936,6 +1005,8 @@ fn read_session_file(path: &Path, since: Option<DateTime<Utc>>, rollup: &mut Rol
        rollup.touch_ts(&ts);
    }

+    record_session_usage(&v, rollup);
+
    // Walk messages looking for tool_use calls with associated results.
    let messages = match v.get("messages").and_then(|m| m.as_array()) {
        Some(m) => m,
@@ -1640,15 +1711,44 @@ fn print_human(rollup: &Rollup, since: Option<DateTime<Utc>>) {
        );
    }
    if runtime.provider_usage_receipts == 0 {
-        println!("Provider usage receipts: (none recorded; this is not zero usage)");
+        println!(
+            "Provider usage receipts (Runtime events): (none recorded; this is not zero usage)"
+        );
    } else {
        println!(
-            "Provider usage receipts: {} records, {} input tokens, {} output tokens",
+            "Provider usage receipts (Runtime events): {} records, {} input tokens, {} output tokens",
            fmt_num(runtime.provider_usage_receipts),
            fmt_num(runtime.provider_reported_input_tokens),
            fmt_num(runtime.provider_reported_output_tokens),
        );
    }
+    let session_usage = &rollup.session_usage;
+    if session_usage.usage_receipts == 0 {
+        println!(
+            "Provider usage receipts (saved terminal sessions): (none recorded; this is not zero usage)"
+        );
+    } else {
+        println!(
+            "Provider usage receipts (saved terminal sessions): {} records in {} sessions, {} input tokens, {} output tokens",
+            fmt_num(session_usage.usage_receipts),
+            fmt_num(session_usage.sessions),
+            fmt_num(session_usage.provider_reported_input_tokens),
+            fmt_num(session_usage.provider_reported_output_tokens),
+        );
+    }
+    if session_usage.sessions_with_total_tokens_only > 0 {
+        println!(
+            "Saved sessions with a combined token total only: {} sessions, {} tokens (no per-call usage receipts saved)",
+            fmt_num(session_usage.sessions_with_total_tokens_only),
+            fmt_num(session_usage.total_tokens_only),
+        );
+    }
+    if session_usage.usage_receipts_incomplete > 0 {
+        println!(
+            "Saved-session usage coverage: {} usage receipts incomplete, not counted as zero",
+            fmt_num(session_usage.usage_receipts_incomplete),
+        );
+    }
    if runtime.diagnostics_unavailable_turn_receipts > 0
        || runtime.diagnostics_incomplete_turn_receipts > 0
        || runtime.terminal_receipts_without_identity > 0
@@ -2241,6 +2341,33 @@ mod tests {
        assert_eq!(runtime.model_requests_started, 2, "status is not a request");
    }

+    #[test]
+    fn saved_terminal_session_usage_is_counted_apart_from_runtime_events() {
+        let session = serde_json::json!({
+            "metadata": { "cost": { "accounted_usage_sources": {
+                "a": { "record": { "settlement": { "coverage": "reported" }, "usage": { "usage": { "input_tokens": 40, "output_tokens": 6 } } } },
+                "b": { "record": { "settlement": { "coverage": "missing" }, "usage": { "usage": { "input_tokens": 0, "output_tokens": 0 } } } },
+                "c": { "record": { "settlement": { "coverage": "incomplete" }, "usage": { "usage": { "input_tokens": 3 } } } }
+            } } }
+        });
+        let mut rollup = Rollup::default();
+        record_session_usage(&session, &mut rollup);
+        let usage = &rollup.session_usage;
+        assert_eq!(usage.usage_receipts, 1);
+        assert_eq!(usage.usage_receipts_incomplete, 1);
+        assert_eq!(usage.sessions, 1);
+        assert_eq!(usage.provider_reported_input_tokens, 40);
+        assert_eq!(usage.provider_reported_output_tokens, 6);
+        record_session_usage(&serde_json::json!({ "metadata": {} }), &mut rollup);
+        assert_eq!(rollup.session_usage.sessions, 1);
+        record_session_usage(
+            &serde_json::json!({ "metadata": { "total_tokens": 900 } }),
+            &mut rollup,
+        );
+        assert_eq!(rollup.session_usage.sessions_with_total_tokens_only, 1);
+        assert_eq!(rollup.session_usage.total_tokens_only, 900);
+    }
+
    #[test]
    fn runtime_usage_receipts_deduplicate_by_runtime_event_identity() {
        let usage = runtime_event(
@@ -39,6 +39,8 @@ pub struct Receipt {
    /// own record; empty when no turn recorded one.
    pub postures: Vec<&'static str>,
    pub totals: ReceiptTotals,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage: Option<ReceiptUsage>,
    pub actions: Vec<ReceiptAction>,
    /// Actions left off the list because it hit [`MAX_RECEIPT_ACTIONS`].
    pub omitted_actions: usize,
@@ -47,6 +49,50 @@ pub struct Receipt {
    pub claim_ceiling: [&'static str; 3],
 }

+#[derive(Debug, Clone, Serialize, PartialEq)]
+pub struct ReceiptUsage {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub tokens: Option<ReceiptTokens>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub cost: Option<ReceiptCost>,
+}
+
+#[derive(Debug, Clone, Default, Serialize, PartialEq, Eq)]
+pub struct ReceiptTokens {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub input: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub output: Option<u64>,
+    pub total: u64,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub cache_read: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub cache_write: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub reasoning: Option<u64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub calls: Option<usize>,
+}
+
+#[derive(Debug, Clone, Serialize, PartialEq)]
+pub struct ReceiptCost {
+    pub state: ReceiptCostState,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub amount: Option<f64>,
+    pub currency: &'static str,
+    pub priced_turns: u32,
+    pub unpriced_turns: u32,
+    pub report: String,
+}
+
+#[derive(Debug, Clone, Copy, Serialize, PartialEq, Eq)]
+#[serde(rename_all = "snake_case")]
+pub enum ReceiptCostState {
+    Priced,
+    Partial,
+    Unknown,
+}
+
 #[derive(Debug, Clone, Copy, Serialize, PartialEq, Eq)]
 #[serde(rename_all = "snake_case")]
 pub enum SourceKind {
@@ -263,6 +263,7 @@ fn empty_receipt() -> Receipt {
        turn: None,
        postures: vec![],
        totals: ReceiptTotals::default(),
+        usage: None,
        actions: vec![],
        omitted_actions: 0,
        not_recorded: vec![],
@@ -217,7 +217,21 @@ pub fn cost(contexts: CommandContexts<'_>, arg: Option<&str>) -> CommandResult {
    };
    let projection = diagnostics.cost_projection();
    let details = arg.is_some_and(|arg| arg.trim().eq_ignore_ascii_case("details"));
-    let plan_only = projection.total == 0.0
+    if cost_is_subscription_only(&projection) && !details {
+        return CommandResult::message(format!(
+            "Session Cost:\n ─────────────────────────────\n {SUBSCRIPTION_ONLY_COST_NOTE}\n\n Run /cost details for the route receipts."
+        ));
+    }
+    match cost_report(&projection, presentation) {
+        Ok(report) => CommandResult::message(report),
+        Err(error) => CommandResult::error(error),
+    }
+}
+
+pub const SUBSCRIPTION_ONLY_COST_NOTE: &str = "These routes use subscription billing. Codewhale does not know the amount charged by your provider.";
+
+pub fn cost_is_subscription_only(projection: &DebugCostProjection) -> bool {
+    projection.total == 0.0
        && projection.priced_turns == 0
        && projection.unpriced_turns == 0
        && !projection.legacy_coverage_unknown
@@ -227,19 +241,10 @@ pub fn cost(contexts: CommandContexts<'_>, arg: Option<&str>) -> CommandResult {
            receipt
                .split_whitespace()
                .any(|field| field == "billing_mode=subscription")
-        });
-    if plan_only && !details {
-        return CommandResult::message(
-            "Session Cost:\n ─────────────────────────────\n These routes use subscription billing. Codewhale does not know the amount charged by your provider.\n\n Run /cost details for the route receipts.".to_string(),
-        );
-    }
-    match cost_report(&projection, presentation) {
-        Ok(report) => CommandResult::message(report),
-        Err(error) => CommandResult::error(error),
-    }
+        })
 }

-fn cost_report(
+pub fn cost_report(
    cost: &DebugCostProjection,
    presentation: &dyn CommandPresentationContext,
 ) -> Result<String, String> {
@@ -414,6 +414,53 @@ pub fn action_line(action: &ReceiptAction) -> String {
    one_line(&line)
 }

+fn tokens_line(tokens: &ReceiptTokens) -> String {
+    let mut line = match (tokens.input, tokens.output) {
+        (Some(input), Some(output)) => {
+            format!("Tokens: {input} in · {output} out · {} total", tokens.total)
+        }
+        _ => format!("Tokens: {} total", tokens.total),
+    };
+    if let Some(calls) = tokens.calls {
+        line.push_str(&format!(
+            " · {}",
+            plural(calls, "provider call", "provider calls")
+        ));
+    }
+    let detail: Vec<String> = [
+        ("cache read", tokens.cache_read),
+        ("cache write", tokens.cache_write),
+        ("reasoning", tokens.reasoning),
+    ]
+    .into_iter()
+    .filter_map(|(label, value)| value.map(|value| format!("{value} {label}")))
+    .collect();
+    if !detail.is_empty() {
+        line.push_str(&format!(" ({})", detail.join(", ")));
+    }
+    line
+}
+
+fn usage_block(usage: &ReceiptUsage) -> String {
+    let mut out = String::new();
+    if let Some(tokens) = &usage.tokens {
+        out.push_str(&one_line(&tokens_line(tokens)));
+        out.push('\n');
+    }
+    if let Some(cost) = &usage.cost {
+        out.push_str("Cost, as /cost reports it:\n");
+        for line in cost
+            .report
+            .lines()
+            .map(str::trim)
+            .filter(|line| !line.is_empty())
+        {
+            out.push_str(&format!("  {}\n", one_line(line)));
+        }
+    }
+    out
+}
+
 /// The readable receipt: header, totals, one line per action, then what the
 /// record does not hold. Valid Markdown and plain enough for a terminal.
 #[must_use]
@@ -457,6 +504,10 @@ pub fn render_markdown(receipt: &Receipt) -> String {
    out.push_str("\n\n");
    out.push_str(&one_line(&totals_line(receipt)));
    out.push_str("\n\n");
+    if let Some(usage) = &receipt.usage {
+        out.push_str(&usage_block(usage));
+        out.push('\n');
+    }
    let width = receipt.actions.len().to_string().len();
    for action in &receipt.actions {
        out.push_str(&format!(
@@ -354,6 +354,18 @@
        "cache_read_per_m": 0.145
      },
      "reason": "Fireworks hosts DeepSeek V4 Pro at its own published rates, as in the reviewed table in crates/engine/src/pricing.rs; Models.dev lists a flat 1.2/1.2 rate with a 0.6 cache-read rate for this deployment."
+    },
+    {
+      "provider": "google",
+      "id": "gemini-4-argon",
+      "max_output": 65536,
+      "reason": "Google publishes 65,536 output tokens by default for synchronous requests (https://aistudio.google.com/docs/models/gemini-4-argon, read 2026-11-10); Models.dev lists 32768."
+    },
+    {
+      "provider": "google",
+      "id": "gemini-4-carbon",
+      "max_output": 65536,
+      "reason": "Google publishes 65,536 output tokens by default for synchronous requests (https://aistudio.google.com/docs/models/gemini-4-carbon, read 2026-11-10); Models.dev lists 32768."
    }
  ],
  "reviewed": {
@@ -395,7 +407,7 @@
          "reasoning"
        ],
        "reasoning": true,
-        "source": "https://models.dev/catalog.json anthropic/claude-fable-5-2, retrieved 2026-11-10",
+        "source": "official vendor model docs, verified 2026-11-10; see source_receipts",
        "family": "Anthropic"
      },
      "claude-opus-5-5": {
@@ -1176,6 +1188,9 @@
        "context_window": 1000000,
        "max_output": 131072
      },
+      "qwen4-max-preview": {
+        "source": "Token Plan Supported Models table, https://qwencloud.com/pricing/token-plan, verified 2026-11-11: id qwen4-max-preview (New), capabilities Text Generation, Reasoning Model, Visual Understanding; see source_receipts"
+      },
      "step-3.5-flash": {
        "context_window": 256000,
        "modalities": [
@@ -1629,14 +1644,16 @@
        "family": "Google"
      },
      "gemini-4-argon": {
-        "source": "official vendor model docs, verified 2026-10-17; see source_receipts",
+        "source": "official vendor model docs, verified 2026-11-10; see source_receipts",
        "context_window": 1048576,
+        "max_output": 65536,
+        "reasoning": true,
        "family": "Google"
      },
      "gemini-4-carbon": {
-        "source": "https://models.dev/catalog.json google/gemini-4-carbon, retrieved 2026-11-10",
+        "source": "official vendor model docs, verified 2026-11-10; see source_receipts",
        "context_window": 1048576,
-        "max_output": 32768,
+        "max_output": 65536,
        "reasoning": true,
        "family": "Google"
      },
@@ -1872,6 +1889,40 @@
      },
      "qwen3.6-35b-a3b": {
        "source": "preserved public presentation facts, not route availability"
+      },
+      "mistral-large-4": {
+        "source": "models.dev mistral/mistral-large-4, discovered 2026-11-11; unreviewed",
+        "context_window": 1048576,
+        "max_output": 262144,
+        "reasoning": true,
+        "family": "Mistral"
+      },
+      "minimax-m3.1-flash": {
+        "source": "models.dev minimax/MiniMax-M3.1-Flash, discovered 2026-11-11; unreviewed",
+        "context_window": 1000000,
+        "reasoning": true,
+        "family": "Minimax"
+      },
+      "kimi-k3.1-pro": {
+        "source": "models.dev moonshotai/kimi-k3.1-pro, discovered 2026-11-11; unreviewed",
+        "context_window": 1048576,
+        "max_output": 1048576,
+        "reasoning": true,
+        "family": "Moonshot"
+      },
+      "kimi-k3.1-pro-highspeed": {
+        "source": "models.dev moonshotai/kimi-k3.1-pro-highspeed, discovered 2026-11-11; unreviewed",
+        "context_window": 1048576,
+        "max_output": 1048576,
+        "reasoning": true,
+        "family": "Moonshot"
+      },
+      "gpt-6.1-terra": {
+        "source": "models.dev openai/gpt-6.1-terra, discovered 2026-11-11; unreviewed",
+        "context_window": 1050000,
+        "max_output": 128000,
+        "reasoning": true,
+        "family": "OpenAi"
      }
    },
    "official_deepseek_aliases": {
@@ -4129,6 +4180,12 @@
        "added_at": "2026-08-02",
        "aliases": []
      },
+      {
+        "id": "qwen4-max-preview",
+        "label": "Qwen",
+        "added_at": "2026-11-10",
+        "aliases": []
+      },
      {
        "id": "kimi-for-coding-highspeed",
        "label": "Moonshot/Kimi",
@@ -4521,6 +4578,46 @@
        "aliases": [
          "deepseek-reasoner"
        ]
+      },
+      {
+        "id": "mistral-large-4",
+        "label": "Mistral",
+        "added_at": "2026-11-05",
+        "aliases": [
+          "mistral-large-4"
+        ]
+      },
+      {
+        "id": "MiniMax-M3.1-Flash",
+        "label": "MiniMax",
+        "added_at": "2026-10-19",
+        "aliases": [
+          "MiniMax-M3.1-Flash"
+        ]
+      },
+      {
+        "id": "kimi-k3.1-pro",
+        "label": "Moonshot/Kimi",
+        "added_at": "2026-10-23",
+        "aliases": [
+          "kimi-k3.1-pro"
+        ]
+      },
+      {
+        "id": "kimi-k3.1-pro-highspeed",
+        "label": "Moonshot/Kimi",
+        "added_at": "2026-10-23",
+        "aliases": [
+          "kimi-k3.1-pro-highspeed"
+        ]
+      },
+      {
+        "id": "gpt-6.1-terra",
+        "label": "OpenAI",
+        "added_at": "2026-10-26",
+        "aliases": [
+          "gpt-6.1-terra"
+        ]
      }
    ],
    "constants": {
@@ -4676,7 +4773,12 @@
      "https://developers.openai.com/api/docs/models/gpt-6-sol": "verified 2026-10-17: $2 in / $0.20 cached / $10 out / $2.50 cache write; gpt-6.1-sol $2 / $0.10 / $10 / $2.50 and gpt-6-luna $0.10 / $0.01 / $0.50 per the changelog",
      "https://developers.openai.com/api/docs/deprecations": "verified 2026-10-17: gpt-5.3-codex and gpt-5.1 move to gpt-6-sol and gpt-5.4-nano to gpt-6-luna, all shutting down 2027-04-01; the catalog has no lifecycle field, so the rows stay until shutdown",
      "https://ai.google.dev/gemini-api/docs/changelog": "verified 2026-10-17: gemini-4-argon GA 2026-10-13, gemini-3.8-flash GA 2026-09-02; gemini-3.7-flash (auto-routed to gemini-3.8-flash) and gemini-3.5-flash (auto-routed to gemini-3.6-flash) deprecated 2026-10-08 and kept only as selector aliases",
-      "https://ai.google.dev/gemini-api/docs/models": "verified 2026-10-17: gemini-4-argon and gemini-3.8-flash are stable; argon's 1M context is stated but no output ceiling is, so none is recorded",
+      "https://ai.google.dev/gemini-api/docs/models": "verified 2026-10-17: gemini-4-argon and gemini-3.8-flash are stable; argon's 1M context is stated; the output ceiling is recorded from its own model page (see the aistudio.google.com receipts, verified 2026-11-10)",
+      "https://aistudio.google.com/docs/models/gemini-4-carbon": "verified 2026-11-10: model code gemini-4-carbon, 1,048,576 context, 65,536 output by default (up to 1,048,576 with long decode), thinking levels low, medium and high, function calling, structured outputs, implicit caching only; thought signatures are not mentioned",
+      "https://aistudio.google.com/docs/models/gemini-4-argon": "verified 2026-11-10: model code gemini-4-argon, 1,048,576 context, 65,536 output by default (up to 1,048,576 with long decode), thinking levels low, medium and high",
+      "https://aistudio.google.com/docs/pricing": "verified 2026-11-10: gemini-4-carbon is $2 in / $10 out / $0.10 cached through 2026-11-30 and $4 / $20 / $0.20 from 2026-12-01; the catalog carries one undated price, so the row shows the current rate",
+      "https://platform.claude.com/docs/en/models/fable-5-2/overview": "verified 2026-11-10: claude-fable-5-2, 1M context, 128K output, adaptive thinking always on, $8 in / $40 out, text and image input",
+      "https://platform.claude.com/docs/en/build-with-claude/effort": "verified 2026-11-10: xhigh is its own effort level on Fable 5.2, Mythos 5.2, Fable 5.1, Fable 5, Opus 5.5, Opus 5, Opus 4.8, Opus 4.7, Sonnet 5.5, Sonnet 5 and Haiku 5.5; not every model that supports max supports xhigh",
      "https://docs.z.ai/guides/vlm/glm-5.3-flash": "verified 2026-10-17: model code glm-5.3-flash, 1M context, 128K output, thinking.type only supports enabled",
      "https://dev.meta.ai/docs/models.md": "verified 2026-10-17: muse-spark-1.3 is recommended for new work, muse-spark-1.2 is the previous version, muse-spark-1.3-contributor has no max effort, muse-wonder-1.0 is a preview; all 1,048,576 context",
      "https://dev.meta.ai/docs/pricing-rate-limits": "verified 2026-10-17: Muse Spark 1.3 and 1.2 $1.25 in / $0.15 cached / $4.25 out, contributor $0.10 / $0.002 / $0.20; Muse Wonder 1.0 $4 / $0.20 / $20; no long-context premium",
@@ -4686,7 +4788,8 @@
      "https://api.deepinfra.com/models/list": "verified 2026-10-20: deepseek-ai/DeepSeek-V4.1-Flash-1017, deepseek-ai/DeepSeek-V4.1-Flash, deepseek-ai/DeepSeek-V4-Pro-0813 and deepseek-ai/DeepSeek-V4-Flash-0731 are listed and not deprecated, each with max_tokens 1048576 and the tools tag; both V4.1 Flash ids are tagged multimodal and reasoning, V4-Flash-0731 reasoning; V4-Pro-0813 carries can-disable-reasoning beside a non-reasoning tag, while its model page documents low, high and max reasoning effort and the Models.dev deepseek/deepseek-v4-pro-0813 row marks reasoning, so reasoning is recorded; the V4-Pro and V4-Flash previews are still listed; no separate output limit is published, so none is recorded",
      "https://modelscope.cn/api/v1/models/deepseek-ai/DeepSeek-V4-Pro-0813": "verified 2026-10-20: the ModelScope card describes DeepSeek-V4-Pro-0813 as the official release of DeepSeek-V4-Pro on the preview model structure, whose card lists a 1M context length; no separate ModelScope API-Inference context limit is published there",
      "https://modelscope.cn/api/v1/models/deepseek-ai/DeepSeek-V4.1-Flash": "verified 2026-10-20: the ModelScope card states contexts of up to one million tokens and a recommended 1M context_window; no separate ModelScope API-Inference context limit is published there",
-      "https://platform.claude.com/docs/en/models/haiku-4-5/overview": "verified 2026-10-22: claude-haiku-4-5 supports manual extended thinking and image input, with 200K context and 64K output; no adaptive-thinking or default-effort support inferred"
+      "https://platform.claude.com/docs/en/models/haiku-4-5/overview": "verified 2026-10-22: claude-haiku-4-5 supports manual extended thinking and image input, with 200K context and 64K output; no adaptive-thinking or default-effort support inferred",
+      "https://qwencloud.com/pricing/token-plan": "verified 2026-11-11: the Supported Models table lists qwen4-max-preview marked New with Text Generation, Reasoning Model and Visual Understanding, so image input is recorded; the page gives no context window, maximum output, tool calling or thinking control, so none is recorded and Codewhale sends no thinking switch"
    },
    "transports": [
      {
@@ -4959,6 +5062,17 @@
        "default_for_provider": false,
        "source": "preserved reviewed exact transport snapshot; see source_receipts"
      },
+      {
+        "provider": "modelstudio-token-plan",
+        "id": "qwen4-max-preview",
+        "endpoint_key": "chat",
+        "default_for_provider": false,
+        "source": "Token Plan Supported Models table, verified 2026-11-11; see source_receipts",
+        "limits": {},
+        "capabilities": {
+          "image_input": "supported"
+        }
+      },
      {
        "provider": "opencode-go",
        "id": "qwen3.8-flash",
@@ -6777,10 +6891,22 @@
        "@MODELSTUDIO_TEXT_MODELS"
      ],
      "modelstudio-coding-plan": [
-        "@MODELSTUDIO_TEXT_MODELS"
+        "qwen3.8-max",
+        "qwen3.7-plus",
+        "qwen3.7-max",
+        "qwen3.6-flash",
+        "deepseek-v4-pro",
+        "deepseek-v4-flash-0731",
+        "glm-5.2"
      ],
      "modelstudio-coding-plan-anthropic": [
-        "@MODELSTUDIO_TEXT_MODELS"
+        "qwen3.8-max",
+        "qwen3.7-plus",
+        "qwen3.7-max",
+        "qwen3.6-flash",
+        "deepseek-v4-pro",
+        "deepseek-v4-flash-0731",
+        "glm-5.2"
      ],
      "mistral": [
        "$DEFAULT_MISTRAL_MODEL",
@@ -8019,7 +8019,7 @@
          "reasoning"
        ],
        "reasoning": true,
-        "source": "https://models.dev/catalog.json anthropic/claude-fable-5-2, retrieved 2026-11-10",
+        "source": "official vendor model docs, verified 2026-11-10; see source_receipts",
        "family": "Anthropic"
      },
      "claude-opus-5-5": {
@@ -8800,6 +8800,9 @@
        "context_window": 1000000,
        "max_output": 131072
      },
+      "qwen4-max-preview": {
+        "source": "Token Plan Supported Models table, https://qwencloud.com/pricing/token-plan, verified 2026-11-11: id qwen4-max-preview (New), capabilities Text Generation, Reasoning Model, Visual Understanding; see source_receipts"
+      },
      "step-3.5-flash": {
        "context_window": 256000,
        "modalities": [
@@ -9253,14 +9256,16 @@
        "family": "Google"
      },
      "gemini-4-argon": {
-        "source": "official vendor model docs, verified 2026-10-17; see source_receipts",
+        "source": "official vendor model docs, verified 2026-11-10; see source_receipts",
        "context_window": 1048576,
+        "max_output": 65536,
+        "reasoning": true,
        "family": "Google"
      },
      "gemini-4-carbon": {
-        "source": "https://models.dev/catalog.json google/gemini-4-carbon, retrieved 2026-11-10",
+        "source": "official vendor model docs, verified 2026-11-10; see source_receipts",
        "context_window": 1048576,
-        "max_output": 32768,
+        "max_output": 65536,
        "reasoning": true,
        "family": "Google"
      },
@@ -9496,6 +9501,40 @@
      },
      "qwen3.6-35b-a3b": {
        "source": "preserved public presentation facts, not route availability"
+      },
+      "mistral-large-4": {
+        "source": "models.dev mistral/mistral-large-4, discovered 2026-11-11; unreviewed",
+        "context_window": 1048576,
+        "max_output": 262144,
+        "reasoning": true,
+        "family": "Mistral"
+      },
+      "minimax-m3.1-flash": {
+        "source": "models.dev minimax/MiniMax-M3.1-Flash, discovered 2026-11-11; unreviewed",
+        "context_window": 1000000,
+        "reasoning": true,
+        "family": "Minimax"
+      },
+      "kimi-k3.1-pro": {
+        "source": "models.dev moonshotai/kimi-k3.1-pro, discovered 2026-11-11; unreviewed",
+        "context_window": 1048576,
+        "max_output": 1048576,
+        "reasoning": true,
+        "family": "Moonshot"
+      },
+      "kimi-k3.1-pro-highspeed": {
+        "source": "models.dev moonshotai/kimi-k3.1-pro-highspeed, discovered 2026-11-11; unreviewed",
+        "context_window": 1048576,
+        "max_output": 1048576,
+        "reasoning": true,
+        "family": "Moonshot"
+      },
+      "gpt-6.1-terra": {
+        "source": "models.dev openai/gpt-6.1-terra, discovered 2026-11-11; unreviewed",
+        "context_window": 1050000,
+        "max_output": 128000,
+        "reasoning": true,
+        "family": "OpenAi"
      }
    },
    "official_deepseek_aliases": {
@@ -11753,6 +11792,12 @@
        "added_at": "2026-08-02",
        "aliases": []
      },
+      {
+        "id": "qwen4-max-preview",
+        "label": "Qwen",
+        "added_at": "2026-11-10",
+        "aliases": []
+      },
      {
        "id": "kimi-for-coding-highspeed",
        "label": "Moonshot/Kimi",
@@ -12145,6 +12190,46 @@
        "aliases": [
          "deepseek-reasoner"
        ]
+      },
+      {
+        "id": "mistral-large-4",
+        "label": "Mistral",
+        "added_at": "2026-11-05",
+        "aliases": [
+          "mistral-large-4"
+        ]
+      },
+      {
+        "id": "MiniMax-M3.1-Flash",
+        "label": "MiniMax",
+        "added_at": "2026-10-19",
+        "aliases": [
+          "MiniMax-M3.1-Flash"
+        ]
+      },
+      {
+        "id": "kimi-k3.1-pro",
+        "label": "Moonshot/Kimi",
+        "added_at": "2026-10-23",
+        "aliases": [
+          "kimi-k3.1-pro"
+        ]
+      },
+      {
+        "id": "kimi-k3.1-pro-highspeed",
+        "label": "Moonshot/Kimi",
+        "added_at": "2026-10-23",
+        "aliases": [
+          "kimi-k3.1-pro-highspeed"
+        ]
+      },
+      {
+        "id": "gpt-6.1-terra",
+        "label": "OpenAI",
+        "added_at": "2026-10-26",
+        "aliases": [
+          "gpt-6.1-terra"
+        ]
      }
    ],
    "constants": {
@@ -12300,7 +12385,12 @@
      "https://developers.openai.com/api/docs/models/gpt-6-sol": "verified 2026-10-17: $2 in / $0.20 cached / $10 out / $2.50 cache write; gpt-6.1-sol $2 / $0.10 / $10 / $2.50 and gpt-6-luna $0.10 / $0.01 / $0.50 per the changelog",
      "https://developers.openai.com/api/docs/deprecations": "verified 2026-10-17: gpt-5.3-codex and gpt-5.1 move to gpt-6-sol and gpt-5.4-nano to gpt-6-luna, all shutting down 2027-04-01; the catalog has no lifecycle field, so the rows stay until shutdown",
      "https://ai.google.dev/gemini-api/docs/changelog": "verified 2026-10-17: gemini-4-argon GA 2026-10-13, gemini-3.8-flash GA 2026-09-02; gemini-3.7-flash (auto-routed to gemini-3.8-flash) and gemini-3.5-flash (auto-routed to gemini-3.6-flash) deprecated 2026-10-08 and kept only as selector aliases",
-      "https://ai.google.dev/gemini-api/docs/models": "verified 2026-10-17: gemini-4-argon and gemini-3.8-flash are stable; argon's 1M context is stated but no output ceiling is, so none is recorded",
+      "https://ai.google.dev/gemini-api/docs/models": "verified 2026-10-17: gemini-4-argon and gemini-3.8-flash are stable; argon's 1M context is stated; the output ceiling is recorded from its own model page (see the aistudio.google.com receipts, verified 2026-11-10)",
+      "https://aistudio.google.com/docs/models/gemini-4-carbon": "verified 2026-11-10: model code gemini-4-carbon, 1,048,576 context, 65,536 output by default (up to 1,048,576 with long decode), thinking levels low, medium and high, function calling, structured outputs, implicit caching only; thought signatures are not mentioned",
+      "https://aistudio.google.com/docs/models/gemini-4-argon": "verified 2026-11-10: model code gemini-4-argon, 1,048,576 context, 65,536 output by default (up to 1,048,576 with long decode), thinking levels low, medium and high",
+      "https://aistudio.google.com/docs/pricing": "verified 2026-11-10: gemini-4-carbon is $2 in / $10 out / $0.10 cached through 2026-11-30 and $4 / $20 / $0.20 from 2026-12-01; the catalog carries one undated price, so the row shows the current rate",
+      "https://platform.claude.com/docs/en/models/fable-5-2/overview": "verified 2026-11-10: claude-fable-5-2, 1M context, 128K output, adaptive thinking always on, $8 in / $40 out, text and image input",
+      "https://platform.claude.com/docs/en/build-with-claude/effort": "verified 2026-11-10: xhigh is its own effort level on Fable 5.2, Mythos 5.2, Fable 5.1, Fable 5, Opus 5.5, Opus 5, Opus 4.8, Opus 4.7, Sonnet 5.5, Sonnet 5 and Haiku 5.5; not every model that supports max supports xhigh",
      "https://docs.z.ai/guides/vlm/glm-5.3-flash": "verified 2026-10-17: model code glm-5.3-flash, 1M context, 128K output, thinking.type only supports enabled",
      "https://dev.meta.ai/docs/models.md": "verified 2026-10-17: muse-spark-1.3 is recommended for new work, muse-spark-1.2 is the previous version, muse-spark-1.3-contributor has no max effort, muse-wonder-1.0 is a preview; all 1,048,576 context",
      "https://dev.meta.ai/docs/pricing-rate-limits": "verified 2026-10-17: Muse Spark 1.3 and 1.2 $1.25 in / $0.15 cached / $4.25 out, contributor $0.10 / $0.002 / $0.20; Muse Wonder 1.0 $4 / $0.20 / $20; no long-context premium",
@@ -12310,7 +12400,8 @@
      "https://api.deepinfra.com/models/list": "verified 2026-10-20: deepseek-ai/DeepSeek-V4.1-Flash-1017, deepseek-ai/DeepSeek-V4.1-Flash, deepseek-ai/DeepSeek-V4-Pro-0813 and deepseek-ai/DeepSeek-V4-Flash-0731 are listed and not deprecated, each with max_tokens 1048576 and the tools tag; both V4.1 Flash ids are tagged multimodal and reasoning, V4-Flash-0731 reasoning; V4-Pro-0813 carries can-disable-reasoning beside a non-reasoning tag, while its model page documents low, high and max reasoning effort and the Models.dev deepseek/deepseek-v4-pro-0813 row marks reasoning, so reasoning is recorded; the V4-Pro and V4-Flash previews are still listed; no separate output limit is published, so none is recorded",
      "https://modelscope.cn/api/v1/models/deepseek-ai/DeepSeek-V4-Pro-0813": "verified 2026-10-20: the ModelScope card describes DeepSeek-V4-Pro-0813 as the official release of DeepSeek-V4-Pro on the preview model structure, whose card lists a 1M context length; no separate ModelScope API-Inference context limit is published there",
      "https://modelscope.cn/api/v1/models/deepseek-ai/DeepSeek-V4.1-Flash": "verified 2026-10-20: the ModelScope card states contexts of up to one million tokens and a recommended 1M context_window; no separate ModelScope API-Inference context limit is published there",
-      "https://platform.claude.com/docs/en/models/haiku-4-5/overview": "verified 2026-10-22: claude-haiku-4-5 supports manual extended thinking and image input, with 200K context and 64K output; no adaptive-thinking or default-effort support inferred"
+      "https://platform.claude.com/docs/en/models/haiku-4-5/overview": "verified 2026-10-22: claude-haiku-4-5 supports manual extended thinking and image input, with 200K context and 64K output; no adaptive-thinking or default-effort support inferred",
+      "https://qwencloud.com/pricing/token-plan": "verified 2026-11-11: the Supported Models table lists qwen4-max-preview marked New with Text Generation, Reasoning Model and Visual Understanding, so image input is recorded; the page gives no context window, maximum output, tool calling or thinking control, so none is recorded and Codewhale sends no thinking switch"
    },
    "transports": [
      {
@@ -12583,6 +12674,17 @@
        "default_for_provider": false,
        "source": "preserved reviewed exact transport snapshot; see source_receipts"
      },
+      {
+        "provider": "modelstudio-token-plan",
+        "id": "qwen4-max-preview",
+        "endpoint_key": "chat",
+        "default_for_provider": false,
+        "source": "Token Plan Supported Models table, verified 2026-11-11; see source_receipts",
+        "limits": {},
+        "capabilities": {
+          "image_input": "supported"
+        }
+      },
      {
        "provider": "opencode-go",
        "id": "qwen3.8-flash",
@@ -14401,10 +14503,22 @@
        "@MODELSTUDIO_TEXT_MODELS"
      ],
      "modelstudio-coding-plan": [
-        "@MODELSTUDIO_TEXT_MODELS"
+        "qwen3.8-max",
+        "qwen3.7-plus",
+        "qwen3.7-max",
+        "qwen3.6-flash",
+        "deepseek-v4-pro",
+        "deepseek-v4-flash-0731",
+        "glm-5.2"
      ],
      "modelstudio-coding-plan-anthropic": [
-        "@MODELSTUDIO_TEXT_MODELS"
+        "qwen3.8-max",
+        "qwen3.7-plus",
+        "qwen3.7-max",
+        "qwen3.6-flash",
+        "deepseek-v4-pro",
+        "deepseek-v4-flash-0731",
+        "glm-5.2"
      ],
      "mistral": [
        "$DEFAULT_MISTRAL_MODEL",
@@ -614,7 +614,7 @@ mod tests {
        let reviewed = bundled_reviewed();
        reviewed.validate().expect("committed data");
        assert_eq!(reviewed.selections.len(), 188);
-        assert_eq!(reviewed.transports.len(), 122);
+        assert_eq!(reviewed.transports.len(), 123);
        let go = reviewed_transport("opencode-go", "gpt-5.6-luna").unwrap();
        assert_eq!(go.endpoint_key, "responses");
        assert_eq!(
@@ -1520,6 +1520,7 @@ pub const SETTINGS_SCHEMA: &[SettingDef] = &[
    // Trust posture with a `/set` entry point but no row; surfaced where
    // sandboxing acts, not as a settings sentence.
    def("sandbox_mode", SettingKind::String, "", None),
+    def("agents", SettingKind::String, "", None),
    // Route memory written by the pickers: per-provider defaults, enabled
    // chooser sets, and pinned routes. Structured values no row could edit.
    def("provider_models", SettingKind::String, "", None),
@@ -73,6 +73,7 @@ path = "src/lib.rs"
 doctest = false

 [dependencies]
+agent-client-protocol.workspace = true
 http = "1.5"
 codewhale-app-server-protocol = { path = "../app-server-protocol", version = "0.10.3" }
 codewhale-sanitize = { path = "../sanitize", version = "0.10.3" }
@@ -179,6 +180,7 @@ wiremock = { version = "0.6", optional = true }
 codewhale-build-support = { path = "../build-support", version = "0.10.3" }

 [dev-dependencies]
+agent-client-protocol-schema.workspace = true
 tokio = { workspace = true, features = ["test-util"] }
 codewhale-app-server-protocol = { path = "../app-server-protocol", version = "0.10.3", features = ["schema"] }
 codewhale-skills = { path = "../skills", version = "0.10.3", features = ["test-support"] }
@@ -727,7 +727,7 @@ var init_lib2 = __esm({
          } else throw new TypeError("Invalid effect");
        }, runner.getOuterStack);
      }
-      effect(execute, label = "anonymous") {
+      effect(execute, label2 = "anonymous") {
        this.assertActive();
        if (this.state === 5) throw new CordisError("INACTIVE_EFFECT");
        const disposables = [];
@@ -745,7 +745,7 @@ var init_lib2 = __esm({
          return disposalTask = task2;
        };
        const meta = {
-          label,
+          label: label2,
          children: []
        };
        const runner = {
@@ -1167,7 +1167,7 @@ var init_lib2 = __esm({
        };
        return dispatch();
      }
-      register(label, name, callback, options) {
+      register(label2, name, callback, options) {
        const method = options.prepend ? "unshift" : "push";
        return this.ctx.fiber.effect(() => {
          (this._hooks[name] ??= [])[method]({
@@ -1176,7 +1176,7 @@ var init_lib2 = __esm({
            ...options
          });
          return () => this.unregister(name, callback);
-        }, label);
+        }, label2);
      }
      unregister(name, callback) {
        const hooks = this._hooks[name];
@@ -1205,8 +1205,8 @@ var init_lib2 = __esm({
        listener = this.ctx.reflect.bind(listener);
        const result = this.bail(this.ctx, "internal/listener", name, listener, options);
        if (result) return result;
-        const label = `ctx.on(${typeof name === "string" ? JSON.stringify(name) : name.toString()})`;
-        return this.register(label, name, listener, options);
+        const label2 = `ctx.on(${typeof name === "string" ? JSON.stringify(name) : name.toString()})`;
+        return this.register(label2, name, listener, options);
      }
      /**
      * Register an event listener that disposes itself after the first call.
@@ -1951,9 +1951,9 @@ var init_lib2 = __esm({
      * @param label — scope label to join; defaults to a fresh unique symbol.
      * @returns a child context whose `name` service resolves in the new scope.
      */
-      isolate(name, label) {
+      isolate(name, label2) {
        const shadow = Object.create(this[symbols.isolate]);
-        shadow[name] = label ?? Symbol(name);
+        shadow[name] = label2 ?? Symbol(name);
        return this.extend({ [symbols.isolate]: shadow });
      }
      intercept(name, config) {
@@ -2650,14 +2650,14 @@ function isolate(ctx) {
  const delims = /* @__PURE__ */ Object.create(null);
  function access2(entry, name, create = false) {
    let realm;
-    const label = entry.options.isolate?.[name];
-    if (!label) return;
-    if (label === true) {
+    const label2 = entry.options.isolate?.[name];
+    if (!label2) return;
+    if (label2 === true) {
      realm = entry.realm ??= new LocalRealm(entry);
    } else if (create) {
-      realm = realms[label] ??= new GlobalRealm(label);
+      realm = realms[label2] ??= new GlobalRealm(label2);
    } else {
-      realm = realms[label];
+      realm = realms[label2];
    }
    return realm?.access(name, create);
  }
@@ -2714,10 +2714,10 @@ function isolate(ctx) {
    }
  });
  ctx.on("loader/partial-dispose", (entry, legacy, active) => {
-    for (const [name, label] of Object.entries(legacy.isolate ?? {})) {
-      if (label === true) continue;
-      if (active && entry.options.isolate?.[name] === label) continue;
-      const realm = realms[label];
+    for (const [name, label2] of Object.entries(legacy.isolate ?? {})) {
+      if (label2 === true) continue;
+      if (active && entry.options.isolate?.[name] === label2) continue;
+      const realm = realms[label2];
      if (!realm) continue;
      for (const entry2 of ctx.loader.entries()) {
        if (entry2.options.isolate?.[name] === realm.label) return;
@@ -2761,9 +2761,9 @@ var init_isolate = __esm({
      }
    };
    GlobalRealm = class extends Realm {
-      constructor(label) {
+      constructor(label2) {
        super();
-        this.label = label;
+        this.label = label2;
      }
      label;
      get suffix() {
@@ -5452,14 +5452,14 @@ function requireDumper() {
    let hasFoldableLine = false;
    const shouldTrackWidth = lineWidth !== -1;
    let previousLineBreak = -1;
-    let plain2 = isPlainSafeFirst(codePointAt(string, 0)) && isPlainSafeLast(codePointAt(string, string.length - 1));
+    let plain3 = isPlainSafeFirst(codePointAt(string, 0)) && isPlainSafeLast(codePointAt(string, string.length - 1));
    if (singleLineOnly || forceQuotes) {
      for (i2 = 0; i2 < string.length; char >= 65536 ? i2 += 2 : i2++) {
        char = codePointAt(string, i2);
        if (!isPrintable(char)) {
          return STYLE_DOUBLE;
        }
-        plain2 = plain2 && isPlainSafe(char, prevChar, inblock);
+        plain3 = plain3 && isPlainSafe(char, prevChar, inblock);
        prevChar = char;
      }
    } else {
@@ -5475,13 +5475,13 @@ function requireDumper() {
        } else if (!isPrintable(char)) {
          return STYLE_DOUBLE;
        }
-        plain2 = plain2 && isPlainSafe(char, prevChar, inblock);
+        plain3 = plain3 && isPlainSafe(char, prevChar, inblock);
        prevChar = char;
      }
      hasFoldableLine = hasFoldableLine || shouldTrackWidth && (i2 - previousLineBreak - 1 > lineWidth && string[previousLineBreak + 1] !== " ");
    }
    if (!hasLineBreak && !hasFoldableLine) {
-      if (plain2 && !forceQuotes && !testAmbiguousType(string)) {
+      if (plain3 && !forceQuotes && !testAmbiguousType(string)) {
        return STYLE_PLAIN;
      }
      return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : STYLE_SINGLE;
@@ -7370,9 +7370,9 @@ var init_acorn = __esm({
    keywordRelationalOperator = /^in(stanceof)?$/;
    nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
    nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
-    TokenType = function TokenType2(label, conf) {
+    TokenType = function TokenType2(label2, conf) {
      if (conf === void 0) conf = {};
-      this.label = label;
+      this.label = label2;
      this.keyword = conf.keyword;
      this.beforeExpr = !!conf.beforeExpr;
      this.startsExpr = !!conf.startsExpr;
@@ -8421,8 +8421,8 @@ var init_acorn = __esm({
    };
    pp$8.parseLabeledStatement = function(node, maybeName, expr, context) {
      for (var i$1 = 0, list2 = this.labels; i$1 < list2.length; i$1 += 1) {
-        var label = list2[i$1];
-        if (label.name === maybeName) {
+        var label2 = list2[i$1];
+        if (label2.name === maybeName) {
          this.raise(expr.start, "Label '" + maybeName + "' is already declared");
        }
      }
@@ -12795,7 +12795,8 @@ var init_compatibility = __esm({
          "prompt",
          "avatars",
          "mcp",
-          "shellHooks"
+          "shellHooks",
+          "remote"
        ]
      },
      refused_services: [
@@ -13553,11 +13554,23 @@ var init_composition = __esm({
 });

 // src/protocol.generated.ts
-var MAGIC_ASCII;
+var MAGIC_ASCII, ErrorCode;
 var init_protocol_generated = __esm({
  "src/protocol.generated.ts"() {
    "use strict";
    MAGIC_ASCII = "CWX1";
+    ErrorCode = {
+      ParseError: -32700,
+      InvalidRequest: -32600,
+      MethodNotFound: -32601,
+      InvalidParams: -32602,
+      Internal: -32603,
+      ExecutionFailed: -32e3,
+      NotAvailable: -32001,
+      Refused: -32002,
+      Denied: -32003,
+      Cancelled: -32800
+    };
  }
 });

@@ -13573,10 +13586,88 @@ var init_protocol = __esm({
 });

 // src/rpc.ts
+var RpcError;
 var init_rpc = __esm({
  "src/rpc.ts"() {
    "use strict";
    init_protocol();
+    RpcError = class extends Error {
+      constructor(code, message, data2) {
+        super(message);
+        this.code = code;
+        this.data = data2;
+        this.name = "RpcError";
+      }
+      code;
+      data;
+      toWire() {
+        return this.data === void 0 ? { code: this.code, message: this.message } : { code: this.code, message: this.message, data: this.data };
+      }
+    };
+  }
+});
+
+// src/dsh/session-prompt.ts
+function checkpointCall(host, ctx, session) {
+  const invocation = host.liveInvocation(ctx);
+  const ticket = invocation?.ticket;
+  return invocation !== void 0 && typeof ticket === "string" && ticket.length > 0 && session !== void 0 && session === invocation.session ? invocation : void 0;
+}
+var CHILD_ONLY, sessionsAdapter, systemPromptAdapter;
+var init_session_prompt = __esm({
+  "src/dsh/session-prompt.ts"() {
+    "use strict";
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    CHILD_ONLY = "system prompt sections are only available on a child agent's agent/created context";
+    sessionsAdapter = {
+      service: "sessions",
+      define(host) {
+        class SessionsService extends Service {
+          constructor(ctx) {
+            super(ctx, "sessions");
+          }
+          async flush(session) {
+            const ctx = this.ctx;
+            const call = checkpointCall(host, ctx, session);
+            if (call === void 0) throw new RpcError(ErrorCode.NotAvailable, "sessions.flush requires this live tool invocation’s session");
+            const owner = call.owner;
+            const live = () => checkpointCall(host, ctx, session) === call && !call.signal.aborted;
+            const run = async () => {
+              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
+              const result2 = await host.rpc.request("session/checkpoint", { owner: owner.ref, ticket: call.ticket }, call.signal);
+              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
+              if (typeof result2 !== "boolean") throw new RpcError(ErrorCode.Internal, "invalid session checkpoint receipt");
+              return result2;
+            };
+            const result = call.pending.then(run);
+            call.pending = result.then(() => void 0, () => void 0);
+            return result;
+          }
+        }
+        Object.freeze(SessionsService.prototype);
+        return SessionsService;
+      }
+    };
+    systemPromptAdapter = {
+      service: "systemPrompt",
+      define() {
+        class SystemPromptService extends Service {
+          constructor(ctx) {
+            super(ctx, "systemPrompt");
+          }
+          section() {
+            throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY);
+          }
+          getSectionOrder() {
+            throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY);
+          }
+        }
+        Object.freeze(SystemPromptService.prototype);
+        return SystemPromptService;
+      }
+    };
  }
 });

@@ -14208,11 +14299,12 @@ var init_lib3 = __esm({
 });

 // src/dsh/dsh-message-compat.js
-var HarnessError, UserQuestionError;
+var PERSONA_PREFIX_SECTION, HarnessError, UserQuestionError;
 var init_dsh_message_compat = __esm({
  "src/dsh/dsh-message-compat.js"() {
    "use strict";
    init_lib3();
+    PERSONA_PREFIX_SECTION = "deployment:persona-prefix";
    HarnessError = class extends Error {
      code;
      constructor(message, code, options) {
@@ -14232,6 +14324,223 @@ var init_dsh_message_compat = __esm({
  }
 });

+// src/dsh/agents.ts
+function plain(value, allowed, what) {
+  if (value === null || typeof value !== "object" || Array.isArray(value) || ![Object.prototype, null].includes(Object.getPrototypeOf(value))) throw new RpcError(ErrorCode.InvalidParams, `expected a plain ${what} object`);
+  const result = /* @__PURE__ */ Object.create(null);
+  for (const key of Reflect.ownKeys(value)) {
+    const descriptor = Object.getOwnPropertyDescriptor(value, key);
+    if (typeof key !== "string" || !allowed.includes(key) || !("value" in descriptor)) throw new RpcError(ErrorCode.NotAvailable, `unsupported ${what} property ${String(key)}`);
+    if (descriptor.value !== void 0) result[key] = descriptor.value;
+  }
+  return result;
+}
+function defineSubagents(host) {
+  class SubagentsShim extends Service {
+    constructor(ctx) {
+      super(ctx, "subagents");
+    }
+    getProvider(name) {
+      return name === "spawn" ? SPAWN_PROVIDER : void 0;
+    }
+    async startActivation(request) {
+      const owner = host.ownerOf(this.ctx);
+      const input = plain(request, ["provider", "label", "childId", "request", "signal", "delivery"], "activation");
+      if (input.provider !== "spawn") throw new RpcError(ErrorCode.NotAvailable, "only the spawn provider is available");
+      const spawn = plain(input.request, ["parent", "prompt", "agentOptions"], "spawn request");
+      const options = spawn.agentOptions === void 0 ? {} : plain(spawn.agentOptions, ["model"], "agentOptions");
+      if (options.model !== void 0 && typeof options.model !== "string") throw new RpcError(ErrorCode.InvalidParams, "agentOptions.model must be a string");
+      const delivery = input.delivery === void 0 ? "parent" : input.delivery;
+      if (delivery !== "caller" && delivery !== "parent") throw new RpcError(ErrorCode.InvalidParams, "delivery must be caller or parent");
+      const childId = input.childId;
+      if (typeof childId !== "string" || !/^[A-Za-z0-9_.:-]{1,128}$/.test(childId)) throw new RpcError(ErrorCode.InvalidParams, "childId must be 1-128 letters, digits, or _.:-");
+      if (!Array.isArray(spawn.prompt) || spawn.prompt.length === 0) throw new RpcError(ErrorCode.InvalidParams, "prompt must be a non-empty content array");
+      const prompt = spawn.prompt.map((block) => {
+        const item = plain(block, ["type", "text"], "prompt block");
+        if (item.type !== "text" || typeof item.text !== "string") throw new RpcError(ErrorCode.NotAvailable, "only text prompt blocks are supported");
+        return item.text;
+      }).join("");
+      if (input.signal !== void 0 && !(input.signal instanceof AbortSignal)) throw new RpcError(ErrorCode.InvalidParams, "signal must be an AbortSignal");
+      const invocation = host.liveInvocation(this.ctx);
+      if (!invocation || invocation.agent === void 0 || spawn.parent !== invocation.agent) {
+        throw new RpcError(ErrorCode.NotAvailable, "startActivation requires the exact live calling agent as parent");
+      }
+      if (invocation.owner !== owner) throw new RpcError(ErrorCode.NotAvailable, "subagents service owner is no longer current");
+      if (invocation.delegated || invocation.subagentTicket === void 0) throw new RpcError(ErrorCode.NotAvailable, "child agents are only available to a root tool invocation");
+      const signal = input.signal === void 0 ? invocation.signal : AbortSignal.any([invocation.signal, input.signal]);
+      signal.throwIfAborted();
+      let persona;
+      const denied = /* @__PURE__ */ new Set();
+      let open = true;
+      const sealed = () => {
+        if (!open) throw new RpcError(ErrorCode.NotAvailable, "the child creation window has closed");
+      };
+      const child = Object.freeze({
+        id: childId,
+        ctx: Object.freeze({
+          systemPrompt: Object.freeze({
+            getSectionOrder(name) {
+              sealed();
+              if (name !== "DEPLOYMENT_PERSONA_PREFIX") throw new RpcError(ErrorCode.NotAvailable, "only the deployment persona slot is available");
+              return PERSONA_ORDER;
+            },
+            section(section) {
+              sealed();
+              const value = plain(section, ["name", "order", "text"], "system prompt section");
+              if (value.name !== PERSONA_PREFIX_SECTION || value.order !== PERSONA_ORDER || typeof value.text !== "string") {
+                throw new RpcError(ErrorCode.NotAvailable, "only the child deployment persona section is supported");
+              }
+              if (persona !== void 0) throw new RpcError(ErrorCode.InvalidParams, "the child persona is already set");
+              if (Buffer.byteLength(value.text) > 32 * 1024) throw new RpcError(ErrorCode.InvalidParams, "child persona exceeds 32768 bytes");
+              persona = value.text;
+              return () => void 0;
+            }
+          }),
+          tools: Object.freeze({
+            restrict(filter) {
+              sealed();
+              const value = plain(filter, ["deny"], "tool filter");
+              if (!Array.isArray(value.deny) || value.deny.some((name) => typeof name !== "string" || name === "")) throw new RpcError(ErrorCode.InvalidParams, "deny must be a list of tool names");
+              for (const name of value.deny) denied.add(name);
+              return () => void 0;
+            }
+          })
+        })
+      });
+      const listeners = (this.ctx.root?.events?._hooks?.["agent/created"] ?? []).filter((hook) => !hook.global && hook.ctx !== void 0 && host.ownerOf(hook.ctx) === owner).map((hook) => hook.callback);
+      try {
+        await Promise.all(listeners.map(async (callback) => callback({ agent: child })));
+      } finally {
+        open = false;
+      }
+      signal.throwIfAborted();
+      const call = invocation;
+      const rpc = (method, params, abort) => host.rpc.request(method, { owner: call.owner.ref, ticket: call.subagentTicket, child_id: childId, ...params }, abort);
+      const started = await rpc("subagent/start", {
+        prompt,
+        ...options.model === void 0 ? {} : { model: options.model },
+        ...persona === void 0 ? {} : { persona },
+        denied_tools: [...denied],
+        delivery
+      }, signal);
+      if (started === null || typeof started !== "object" || started.child_id !== childId || typeof started.message_id !== "string") {
+        throw new RpcError(ErrorCode.Internal, "invalid child activation receipt");
+      }
+      let result;
+      let disposed;
+      return Object.freeze({
+        childId,
+        messageId: started.message_id,
+        get result() {
+          result ??= rpc("subagent/result", {}, call.signal).then((value) => {
+            if (value === null || typeof value !== "object" || typeof value.stop_reason !== "string" || !Array.isArray(value.output)) {
+              throw new RpcError(ErrorCode.Internal, "invalid child result receipt");
+            }
+            return Object.freeze({
+              stopReason: value.stop_reason,
+              output: Object.freeze(value.output.map((block) => Object.freeze({ type: "text", text: String(block.text) }))),
+              ...value.omitted_blocks > 0 ? { diagnostic: `${value.omitted_blocks} non-text output block(s) are not supported` } : {}
+            });
+          });
+          return result;
+        },
+        dispose() {
+          disposed ??= rpc("subagent/dispose", {}, call.signal).then(() => void 0);
+          return disposed;
+        }
+      });
+    }
+  }
+  Object.freeze(SubagentsShim.prototype);
+  return SubagentsShim;
+}
+function defineAgents() {
+  class AgentsShim extends Service {
+    constructor(ctx) {
+      super(ctx, "agents");
+    }
+  }
+  Object.freeze(AgentsShim.prototype);
+  return AgentsShim;
+}
+var SPAWN_PROVIDER, PERSONA_ORDER, DSH_AGENT_ADAPTERS;
+var init_agents = __esm({
+  "src/dsh/agents.ts"() {
+    "use strict";
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    init_dsh_message_compat();
+    SPAWN_PROVIDER = Object.freeze({
+      name: "spawn",
+      inheritsParentContext: false,
+      capabilities: Object.freeze({ persona: true, toolFilter: true, agentOptions: true })
+    });
+    PERSONA_ORDER = 0;
+    DSH_AGENT_ADAPTERS = Object.freeze([
+      { service: "subagents", define: defineSubagents },
+      { service: "agents", define: defineAgents }
+    ]);
+  }
+});
+
+// src/dsh/remote.ts
+function label(value) {
+  if (value === void 0) return void 0;
+  if (typeof value !== "string") throw new RpcError(ErrorCode.InvalidParams, "remote.pair label must be a string");
+  return value;
+}
+function grant(value) {
+  if (typeof value !== "string" || value.length === 0 || value.length > 128) throw new RpcError(ErrorCode.InvalidParams, "remote.revoke needs the grant id remote.pair returned");
+  return value;
+}
+var remoteAdapter;
+var init_remote = __esm({
+  "src/dsh/remote.ts"() {
+    "use strict";
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    remoteAdapter = {
+      service: "remote",
+      define(host) {
+        class RemoteService extends Service {
+          constructor(ctx) {
+            super(ctx, "remote");
+          }
+          status() {
+            return host.broker(this.ctx, "remote", "status", {});
+          }
+          pair(options) {
+            const value = label(options?.label);
+            return host.broker(this.ctx, "remote", "pair", value === void 0 ? {} : { label: value });
+          }
+          clients() {
+            return host.broker(this.ctx, "remote", "clients", {});
+          }
+          revoke(id) {
+            return host.broker(this.ctx, "remote", "revoke", { grant: grant(id) });
+          }
+        }
+        Object.freeze(RemoteService.prototype);
+        return RemoteService;
+      }
+    };
+  }
+});
+
+// src/dsh/adapters.ts
+var DSH_ADAPTERS;
+var init_adapters = __esm({
+  "src/dsh/adapters.ts"() {
+    "use strict";
+    init_session_prompt();
+    init_agents();
+    init_remote();
+    DSH_ADAPTERS = [sessionsAdapter, systemPromptAdapter, ...DSH_AGENT_ADAPTERS, remoteAdapter];
+  }
+});
+
 // src/dsh/dsh-tools-compat.js
 var init_dsh_tools_compat = __esm({
  "src/dsh/dsh-tools-compat.js"() {
@@ -14313,11 +14622,12 @@ var init_commands = __esm({

 // src/root.ts
 import { AsyncLocalStorage as AsyncLocalStorage2 } from "node:async_hooks";
-var REFUSED_SERVICES, PROVIDED_SERVICES, ownerStorage;
+var REFUSED_SERVICES, PROVIDED_SERVICES, CORDIS_SERVICES, ownerStorage;
 var init_root = __esm({
  "src/root.ts"() {
    "use strict";
    init_composition();
+    init_adapters();
    init_protocol();
    init_rpc();
    init_dsh_message_compat();
@@ -14339,6 +14649,7 @@ var init_root = __esm({
    init_commands();
    REFUSED_SERVICES = new Set(compatibility_default.refused_services);
    PROVIDED_SERVICES = new Set(Object.values(compatibility_default.provided_services).flat());
+    CORDIS_SERVICES = new Set(compatibility_default.provided_services.cordis);
    ownerStorage = new AsyncLocalStorage2();
  }
 });
@@ -14455,16 +14766,16 @@ function entryListProblem(rows, at2 = "") {
    return at2 === "" ? "the composition must be a top-level list of plugin rows" : `group ${at2} must hold a list of plugin rows`;
  }
  for (const [index, row] of rows.entries()) {
-    const label = at2 === "" ? `row ${String(index + 1)}` : `${at2} row ${String(index + 1)}`;
+    const label2 = at2 === "" ? `row ${String(index + 1)}` : `${at2} row ${String(index + 1)}`;
    if (typeof row !== "object" || row === null || Array.isArray(row)) {
-      return `${label} is not a plugin row (expected a map with a "name")`;
+      return `${label2} is not a plugin row (expected a map with a "name")`;
    }
    const { name, group, config } = row;
    if (typeof name !== "string" || name === "") {
-      return `${label} names no plugin (a "name" string is required)`;
+      return `${label2} names no plugin (a "name" string is required)`;
    }
    if (group === true) {
-      const nested = entryListProblem(config, label);
+      const nested = entryListProblem(config, label2);
      if (nested !== void 0) return nested;
    }
  }
@@ -14487,8 +14798,8 @@ async function unresolvableRows(rows, presetBase, harnessBase, resolves, io, at2
      continue;
    }
    if (await rowResolves(classifyRowSpecifier(row.name), presetBase, harnessBase, resolves, io)) continue;
-    const label = typeof row.id === "string" && row.id !== "" ? `row "${row.id}"` : positional;
-    found.push({ label, name: row.name });
+    const label2 = typeof row.id === "string" && row.id !== "" ? `row "${row.id}"` : positional;
+    found.push({ label: label2, name: row.name });
  }
  return found;
 }
@@ -14659,7 +14970,7 @@ var init_composition_inventory = __esm({
 import { createHash as createHash3 } from "node:crypto";
 import { resolve as resolve5, relative as relative3, dirname as dirname4, sep as sep3 } from "node:path";
 import { fileURLToPath as fileURLToPath5, pathToFileURL as pathToFileURL5 } from "node:url";
-function plain(path) {
+function plain2(path) {
  return typeof path === "string" && path.length > 0 && path.length <= 4096 && !/[\\:\u0000-\u001f\u007f]/u.test(path) && !path.startsWith("/") && path.split("/").every((p) => p !== "" && p !== "." && p !== "..");
 }
 function fail(message) {
@@ -14699,7 +15010,7 @@ function containedPackageModule(name, documents, files) {
    entry = value && typeof value === "object" && !Array.isArray(value) && Object.keys(value).some((k) => k.startsWith(".")) ? target(value[subpath]) : subpath === "." ? target(value) : void 0;
  } else if (subpath === ".") entry = typeof data2.main === "string" ? data2.main : "./index.js";
  else entry = subpath;
-  if (typeof entry !== "string" || !entry.startsWith("./") || !plain(entry.slice(2))) return;
+  if (typeof entry !== "string" || !entry.startsWith("./") || !plain2(entry.slice(2))) return;
  const path = `${packageRoot}/${entry.slice(2)}`;
  if (!/\.(mjs|js|mts)$/.test(path) || !SHA.test(files[path] ?? "")) return;
  return { name, path, sha256: files[path] };
@@ -14712,20 +15023,20 @@ async function reviewAgentPresets(input) {
  const baseUrl = pathToFileURL5(`${base}${sep3}`).href;
  function key(path) {
    const inside = relative3(base, path).split(sep3).join("/");
-    if (!plain(inside)) fail("path escapes the admitted source root");
+    if (!plain2(inside)) fail("path escapes the admitted source root");
    return inside;
  }
  const documents = /* @__PURE__ */ new Map();
  let bytes = 0;
  for (const doc of input.documents) {
-    if (!plain(doc.path) || !SHA.test(doc.sha256) || files[doc.path] !== doc.sha256 || hash(doc.source) !== doc.sha256 || documents.has(doc.path)) fail("document changed or is outside the source receipt");
+    if (!plain2(doc.path) || !SHA.test(doc.sha256) || files[doc.path] !== doc.sha256 || hash(doc.source) !== doc.sha256 || documents.has(doc.path)) fail("document changed or is outside the source receipt");
    bytes += Buffer.byteLength(doc.source);
    if (Buffer.byteLength(doc.source) > 1024 * 1024 || bytes > 4 * 1024 * 1024) fail("documents exceed their bound");
    documents.set(doc.path, doc.source);
  }
  const directories = new Set(input.directories);
-  for (const path of directories) if (!plain(path)) fail("invalid source directory");
-  for (const path of Object.keys(files)) if (!plain(path) || !SHA.test(files[path])) fail("invalid source file receipt");
+  for (const path of directories) if (!plain2(path)) fail("invalid source directory");
+  for (const path of Object.keys(files)) if (!plain2(path) || !SHA.test(files[path])) fail("invalid source file receipt");
  const invalid = /* @__PURE__ */ new Set();
  const parsed = /* @__PURE__ */ new Map();
  const io = {
@@ -14790,7 +15101,7 @@ async function reviewAgentPresets(input) {
  }
  if (config.roots !== void 0 && !Array.isArray(config.roots)) fail("roots must be a literal list");
  for (const root of config.roots ?? []) {
-    if (!root || Object.keys(root).some((k) => !["path", "trust"].includes(k)) || !plain(root.path) || !["system", "user"].includes(root.trust)) fail("configured roots must stay inside the admitted package");
+    if (!root || Object.keys(root).some((k) => !["path", "trust"].includes(k)) || !plain2(root.path) || !["system", "user"].includes(root.trust)) fail("configured roots must stay inside the admitted package");
    if (!directories.has(root.path)) fail("configured preset root was not admitted");
    roots.push({ path: resolve5(base, root.path), trust: root.trust });
  }
@@ -921,7 +921,7 @@ var init_lib2 = __esm({
          } else throw new TypeError("Invalid effect");
        }, runner.getOuterStack);
      }
-      effect(execute, label = "anonymous") {
+      effect(execute, label2 = "anonymous") {
        this.assertActive();
        if (this.state === 5) throw new CordisError("INACTIVE_EFFECT");
        const disposables = [];
@@ -939,7 +939,7 @@ var init_lib2 = __esm({
          return disposalTask = task2;
        };
        const meta = {
-          label,
+          label: label2,
          children: []
        };
        const runner = {
@@ -1361,7 +1361,7 @@ var init_lib2 = __esm({
        };
        return dispatch();
      }
-      register(label, name, callback, options) {
+      register(label2, name, callback, options) {
        const method = options.prepend ? "unshift" : "push";
        return this.ctx.fiber.effect(() => {
          (this._hooks[name] ??= [])[method]({
@@ -1370,7 +1370,7 @@ var init_lib2 = __esm({
            ...options
          });
          return () => this.unregister(name, callback);
-        }, label);
+        }, label2);
      }
      unregister(name, callback) {
        const hooks = this._hooks[name];
@@ -1399,8 +1399,8 @@ var init_lib2 = __esm({
        listener = this.ctx.reflect.bind(listener);
        const result = this.bail(this.ctx, "internal/listener", name, listener, options);
        if (result) return result;
-        const label = `ctx.on(${typeof name === "string" ? JSON.stringify(name) : name.toString()})`;
-        return this.register(label, name, listener, options);
+        const label2 = `ctx.on(${typeof name === "string" ? JSON.stringify(name) : name.toString()})`;
+        return this.register(label2, name, listener, options);
      }
      /**
      * Register an event listener that disposes itself after the first call.
@@ -2145,9 +2145,9 @@ var init_lib2 = __esm({
      * @param label — scope label to join; defaults to a fresh unique symbol.
      * @returns a child context whose `name` service resolves in the new scope.
      */
-      isolate(name, label) {
+      isolate(name, label2) {
        const shadow = Object.create(this[symbols.isolate]);
-        shadow[name] = label ?? Symbol(name);
+        shadow[name] = label2 ?? Symbol(name);
        return this.extend({ [symbols.isolate]: shadow });
      }
      intercept(name, config) {
@@ -4543,14 +4543,14 @@ function isolate(ctx) {
  const delims = /* @__PURE__ */ Object.create(null);
  function access2(entry, name, create = false) {
    let realm;
-    const label = entry.options.isolate?.[name];
-    if (!label) return;
-    if (label === true) {
+    const label2 = entry.options.isolate?.[name];
+    if (!label2) return;
+    if (label2 === true) {
      realm = entry.realm ??= new LocalRealm(entry);
    } else if (create) {
-      realm = realms[label] ??= new GlobalRealm(label);
+      realm = realms[label2] ??= new GlobalRealm(label2);
    } else {
-      realm = realms[label];
+      realm = realms[label2];
    }
    return realm?.access(name, create);
  }
@@ -4607,10 +4607,10 @@ function isolate(ctx) {
    }
  });
  ctx.on("loader/partial-dispose", (entry, legacy, active) => {
-    for (const [name, label] of Object.entries(legacy.isolate ?? {})) {
-      if (label === true) continue;
-      if (active && entry.options.isolate?.[name] === label) continue;
-      const realm = realms[label];
+    for (const [name, label2] of Object.entries(legacy.isolate ?? {})) {
+      if (label2 === true) continue;
+      if (active && entry.options.isolate?.[name] === label2) continue;
+      const realm = realms[label2];
      if (!realm) continue;
      for (const entry2 of ctx.loader.entries()) {
        if (entry2.options.isolate?.[name] === realm.label) return;
@@ -4655,9 +4655,9 @@ var init_isolate = __esm({
      }
    };
    GlobalRealm = class extends Realm {
-      constructor(label) {
+      constructor(label2) {
        super();
-        this.label = label;
+        this.label = label2;
      }
      label;
      get suffix() {
@@ -7371,14 +7371,14 @@ function requireDumper() {
    let hasFoldableLine = false;
    const shouldTrackWidth = lineWidth !== -1;
    let previousLineBreak = -1;
-    let plain = isPlainSafeFirst(codePointAt(string, 0)) && isPlainSafeLast(codePointAt(string, string.length - 1));
+    let plain2 = isPlainSafeFirst(codePointAt(string, 0)) && isPlainSafeLast(codePointAt(string, string.length - 1));
    if (singleLineOnly || forceQuotes) {
      for (i2 = 0; i2 < string.length; char >= 65536 ? i2 += 2 : i2++) {
        char = codePointAt(string, i2);
        if (!isPrintable(char)) {
          return STYLE_DOUBLE;
        }
-        plain = plain && isPlainSafe(char, prevChar, inblock);
+        plain2 = plain2 && isPlainSafe(char, prevChar, inblock);
        prevChar = char;
      }
    } else {
@@ -7394,13 +7394,13 @@ function requireDumper() {
        } else if (!isPrintable(char)) {
          return STYLE_DOUBLE;
        }
-        plain = plain && isPlainSafe(char, prevChar, inblock);
+        plain2 = plain2 && isPlainSafe(char, prevChar, inblock);
        prevChar = char;
      }
      hasFoldableLine = hasFoldableLine || shouldTrackWidth && (i2 - previousLineBreak - 1 > lineWidth && string[previousLineBreak + 1] !== " ");
    }
    if (!hasLineBreak && !hasFoldableLine) {
-      if (plain && !forceQuotes && !testAmbiguousType(string)) {
+      if (plain2 && !forceQuotes && !testAmbiguousType(string)) {
        return STYLE_PLAIN;
      }
      return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : STYLE_SINGLE;
@@ -9683,9 +9683,9 @@ var init_acorn = __esm({
    keywordRelationalOperator = /^in(stanceof)?$/;
    nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
    nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
-    TokenType = function TokenType2(label, conf) {
+    TokenType = function TokenType2(label2, conf) {
      if (conf === void 0) conf = {};
-      this.label = label;
+      this.label = label2;
      this.keyword = conf.keyword;
      this.beforeExpr = !!conf.beforeExpr;
      this.startsExpr = !!conf.startsExpr;
@@ -10734,8 +10734,8 @@ var init_acorn = __esm({
    };
    pp$8.parseLabeledStatement = function(node, maybeName, expr, context) {
      for (var i$1 = 0, list2 = this.labels; i$1 < list2.length; i$1 += 1) {
-        var label = list2[i$1];
-        if (label.name === maybeName) {
+        var label2 = list2[i$1];
+        if (label2.name === maybeName) {
          this.raise(expr.start, "Label '" + maybeName + "' is already declared");
        }
      }
@@ -15147,7 +15147,8 @@ var init_compatibility = __esm({
          "prompt",
          "avatars",
          "mcp",
-          "shellHooks"
+          "shellHooks",
+          "remote"
        ]
      },
      refused_services: [
@@ -15899,6 +15900,7 @@ var init_protocol_generated = __esm({
      { name: "subagent/start", direction: "host_to_core", request: true, params: "SubagentStartParams", tiers: ["plugin", "builtin"] },
      { name: "subagent/result", direction: "host_to_core", request: true, params: "SubagentHandleParams", tiers: ["plugin", "builtin"] },
      { name: "subagent/dispose", direction: "host_to_core", request: true, params: "SubagentHandleParams", tiers: ["plugin", "builtin"] },
+      { name: "dsh/broker", direction: "host_to_core", request: true, params: "DshBrokerParams", tiers: ["plugin", "builtin"] },
      { name: "proc/launch", direction: "host_to_core", request: true, params: "ProcLaunchParams", tiers: ["builtin"] },
      { name: "proc/read", direction: "host_to_core", request: true, params: "ProcSessionParams", tiers: ["builtin"] },
      { name: "proc/write", direction: "host_to_core", request: true, params: "ProcWriteParams", tiers: ["builtin"] },
@@ -15939,6 +15941,16 @@ var init_protocol_generated = __esm({
        required: { owner: { ref: "OwnerRef" } },
        optional: { entry: { ref: "EntryRef" } }
      },
+      DshBrokerParams: {
+        strict: true,
+        required: { owner: { ref: "OwnerRef" }, ticket: "string", service: "string", method: "string", input: "json" },
+        optional: {}
+      },
+      DshBrokerTicketWire: {
+        strict: true,
+        required: { service: "string", ticket: "string" },
+        optional: {}
+      },
      EmptyParams: {
        strict: true,
        required: {},
@@ -16102,7 +16114,7 @@ var init_protocol_generated = __esm({
      ToolCallParams: {
        strict: false,
        required: { handle: "uint", call_id: "string", input: "json", deadline_ms: "uint" },
-        optional: { workspace: "string", ticket: "string", checkpoint_ticket: "string", question_ticket: "string", subagent_ticket: "string", caller_tools: { items: "string" }, session_id: "string", agent_id: "string", origin_turn_id: "string" }
+        optional: { workspace: "string", ticket: "string", checkpoint_ticket: "string", question_ticket: "string", subagent_ticket: "string", broker_tickets: { items: { ref: "DshBrokerTicketWire" } }, caller_tools: { items: "string" }, session_id: "string", agent_id: "string", origin_turn_id: "string" }
      },
      UnregisterParams: {
        strict: true,
@@ -16425,6 +16437,291 @@ var init_rpc = __esm({
  }
 });

+// src/dsh/session-prompt.ts
+function checkpointCall(host2, ctx, session) {
+  const invocation = host2.liveInvocation(ctx);
+  const ticket = invocation?.ticket;
+  return invocation !== void 0 && typeof ticket === "string" && ticket.length > 0 && session !== void 0 && session === invocation.session ? invocation : void 0;
+}
+var CHILD_ONLY, sessionsAdapter, systemPromptAdapter;
+var init_session_prompt = __esm({
+  "src/dsh/session-prompt.ts"() {
+    "use strict";
+    init_define_BUILTIN_MODULE_DIGESTS();
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    CHILD_ONLY = "system prompt sections are only available on a child agent's agent/created context";
+    sessionsAdapter = {
+      service: "sessions",
+      define(host2) {
+        class SessionsService extends Service {
+          constructor(ctx) {
+            super(ctx, "sessions");
+          }
+          async flush(session) {
+            const ctx = this.ctx;
+            const call = checkpointCall(host2, ctx, session);
+            if (call === void 0) throw new RpcError(ErrorCode.NotAvailable, "sessions.flush requires this live tool invocation’s session");
+            const owner = call.owner;
+            const live = () => checkpointCall(host2, ctx, session) === call && !call.signal.aborted;
+            const run = async () => {
+              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
+              const result2 = await host2.rpc.request("session/checkpoint", { owner: owner.ref, ticket: call.ticket }, call.signal);
+              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
+              if (typeof result2 !== "boolean") throw new RpcError(ErrorCode.Internal, "invalid session checkpoint receipt");
+              return result2;
+            };
+            const result = call.pending.then(run);
+            call.pending = result.then(() => void 0, () => void 0);
+            return result;
+          }
+        }
+        Object.freeze(SessionsService.prototype);
+        return SessionsService;
+      }
+    };
+    systemPromptAdapter = {
+      service: "systemPrompt",
+      define() {
+        class SystemPromptService extends Service {
+          constructor(ctx) {
+            super(ctx, "systemPrompt");
+          }
+          section() {
+            throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY);
+          }
+          getSectionOrder() {
+            throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY);
+          }
+        }
+        Object.freeze(SystemPromptService.prototype);
+        return SystemPromptService;
+      }
+    };
+  }
+});
+
+// src/dsh/agents.ts
+function plain(value, allowed, what) {
+  if (value === null || typeof value !== "object" || Array.isArray(value) || ![Object.prototype, null].includes(Object.getPrototypeOf(value))) throw new RpcError(ErrorCode.InvalidParams, `expected a plain ${what} object`);
+  const result = /* @__PURE__ */ Object.create(null);
+  for (const key of Reflect.ownKeys(value)) {
+    const descriptor = Object.getOwnPropertyDescriptor(value, key);
+    if (typeof key !== "string" || !allowed.includes(key) || !("value" in descriptor)) throw new RpcError(ErrorCode.NotAvailable, `unsupported ${what} property ${String(key)}`);
+    if (descriptor.value !== void 0) result[key] = descriptor.value;
+  }
+  return result;
+}
+function defineSubagents(host2) {
+  class SubagentsShim extends Service {
+    constructor(ctx) {
+      super(ctx, "subagents");
+    }
+    getProvider(name) {
+      return name === "spawn" ? SPAWN_PROVIDER : void 0;
+    }
+    async startActivation(request) {
+      const owner = host2.ownerOf(this.ctx);
+      const input = plain(request, ["provider", "label", "childId", "request", "signal", "delivery"], "activation");
+      if (input.provider !== "spawn") throw new RpcError(ErrorCode.NotAvailable, "only the spawn provider is available");
+      const spawn = plain(input.request, ["parent", "prompt", "agentOptions"], "spawn request");
+      const options = spawn.agentOptions === void 0 ? {} : plain(spawn.agentOptions, ["model"], "agentOptions");
+      if (options.model !== void 0 && typeof options.model !== "string") throw new RpcError(ErrorCode.InvalidParams, "agentOptions.model must be a string");
+      const delivery = input.delivery === void 0 ? "parent" : input.delivery;
+      if (delivery !== "caller" && delivery !== "parent") throw new RpcError(ErrorCode.InvalidParams, "delivery must be caller or parent");
+      const childId = input.childId;
+      if (typeof childId !== "string" || !/^[A-Za-z0-9_.:-]{1,128}$/.test(childId)) throw new RpcError(ErrorCode.InvalidParams, "childId must be 1-128 letters, digits, or _.:-");
+      if (!Array.isArray(spawn.prompt) || spawn.prompt.length === 0) throw new RpcError(ErrorCode.InvalidParams, "prompt must be a non-empty content array");
+      const prompt = spawn.prompt.map((block) => {
+        const item = plain(block, ["type", "text"], "prompt block");
+        if (item.type !== "text" || typeof item.text !== "string") throw new RpcError(ErrorCode.NotAvailable, "only text prompt blocks are supported");
+        return item.text;
+      }).join("");
+      if (input.signal !== void 0 && !(input.signal instanceof AbortSignal)) throw new RpcError(ErrorCode.InvalidParams, "signal must be an AbortSignal");
+      const invocation = host2.liveInvocation(this.ctx);
+      if (!invocation || invocation.agent === void 0 || spawn.parent !== invocation.agent) {
+        throw new RpcError(ErrorCode.NotAvailable, "startActivation requires the exact live calling agent as parent");
+      }
+      if (invocation.owner !== owner) throw new RpcError(ErrorCode.NotAvailable, "subagents service owner is no longer current");
+      if (invocation.delegated || invocation.subagentTicket === void 0) throw new RpcError(ErrorCode.NotAvailable, "child agents are only available to a root tool invocation");
+      const signal = input.signal === void 0 ? invocation.signal : AbortSignal.any([invocation.signal, input.signal]);
+      signal.throwIfAborted();
+      let persona;
+      const denied2 = /* @__PURE__ */ new Set();
+      let open2 = true;
+      const sealed = () => {
+        if (!open2) throw new RpcError(ErrorCode.NotAvailable, "the child creation window has closed");
+      };
+      const child = Object.freeze({
+        id: childId,
+        ctx: Object.freeze({
+          systemPrompt: Object.freeze({
+            getSectionOrder(name) {
+              sealed();
+              if (name !== "DEPLOYMENT_PERSONA_PREFIX") throw new RpcError(ErrorCode.NotAvailable, "only the deployment persona slot is available");
+              return PERSONA_ORDER;
+            },
+            section(section) {
+              sealed();
+              const value = plain(section, ["name", "order", "text"], "system prompt section");
+              if (value.name !== PERSONA_PREFIX_SECTION || value.order !== PERSONA_ORDER || typeof value.text !== "string") {
+                throw new RpcError(ErrorCode.NotAvailable, "only the child deployment persona section is supported");
+              }
+              if (persona !== void 0) throw new RpcError(ErrorCode.InvalidParams, "the child persona is already set");
+              if (Buffer.byteLength(value.text) > 32 * 1024) throw new RpcError(ErrorCode.InvalidParams, "child persona exceeds 32768 bytes");
+              persona = value.text;
+              return () => void 0;
+            }
+          }),
+          tools: Object.freeze({
+            restrict(filter) {
+              sealed();
+              const value = plain(filter, ["deny"], "tool filter");
+              if (!Array.isArray(value.deny) || value.deny.some((name) => typeof name !== "string" || name === "")) throw new RpcError(ErrorCode.InvalidParams, "deny must be a list of tool names");
+              for (const name of value.deny) denied2.add(name);
+              return () => void 0;
+            }
+          })
+        })
+      });
+      const listeners = (this.ctx.root?.events?._hooks?.["agent/created"] ?? []).filter((hook) => !hook.global && hook.ctx !== void 0 && host2.ownerOf(hook.ctx) === owner).map((hook) => hook.callback);
+      try {
+        await Promise.all(listeners.map(async (callback) => callback({ agent: child })));
+      } finally {
+        open2 = false;
+      }
+      signal.throwIfAborted();
+      const call = invocation;
+      const rpc2 = (method, params, abort) => host2.rpc.request(method, { owner: call.owner.ref, ticket: call.subagentTicket, child_id: childId, ...params }, abort);
+      const started = await rpc2("subagent/start", {
+        prompt,
+        ...options.model === void 0 ? {} : { model: options.model },
+        ...persona === void 0 ? {} : { persona },
+        denied_tools: [...denied2],
+        delivery
+      }, signal);
+      if (started === null || typeof started !== "object" || started.child_id !== childId || typeof started.message_id !== "string") {
+        throw new RpcError(ErrorCode.Internal, "invalid child activation receipt");
+      }
+      let result;
+      let disposed;
+      return Object.freeze({
+        childId,
+        messageId: started.message_id,
+        get result() {
+          result ??= rpc2("subagent/result", {}, call.signal).then((value) => {
+            if (value === null || typeof value !== "object" || typeof value.stop_reason !== "string" || !Array.isArray(value.output)) {
+              throw new RpcError(ErrorCode.Internal, "invalid child result receipt");
+            }
+            return Object.freeze({
+              stopReason: value.stop_reason,
+              output: Object.freeze(value.output.map((block) => Object.freeze({ type: "text", text: String(block.text) }))),
+              ...value.omitted_blocks > 0 ? { diagnostic: `${value.omitted_blocks} non-text output block(s) are not supported` } : {}
+            });
+          });
+          return result;
+        },
+        dispose() {
+          disposed ??= rpc2("subagent/dispose", {}, call.signal).then(() => void 0);
+          return disposed;
+        }
+      });
+    }
+  }
+  Object.freeze(SubagentsShim.prototype);
+  return SubagentsShim;
+}
+function defineAgents() {
+  class AgentsShim extends Service {
+    constructor(ctx) {
+      super(ctx, "agents");
+    }
+  }
+  Object.freeze(AgentsShim.prototype);
+  return AgentsShim;
+}
+var SPAWN_PROVIDER, PERSONA_ORDER, DSH_AGENT_ADAPTERS;
+var init_agents = __esm({
+  "src/dsh/agents.ts"() {
+    "use strict";
+    init_define_BUILTIN_MODULE_DIGESTS();
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    init_dsh_message_compat();
+    SPAWN_PROVIDER = Object.freeze({
+      name: "spawn",
+      inheritsParentContext: false,
+      capabilities: Object.freeze({ persona: true, toolFilter: true, agentOptions: true })
+    });
+    PERSONA_ORDER = 0;
+    DSH_AGENT_ADAPTERS = Object.freeze([
+      { service: "subagents", define: defineSubagents },
+      { service: "agents", define: defineAgents }
+    ]);
+  }
+});
+
+// src/dsh/remote.ts
+function label(value) {
+  if (value === void 0) return void 0;
+  if (typeof value !== "string") throw new RpcError(ErrorCode.InvalidParams, "remote.pair label must be a string");
+  return value;
+}
+function grant(value) {
+  if (typeof value !== "string" || value.length === 0 || value.length > 128) throw new RpcError(ErrorCode.InvalidParams, "remote.revoke needs the grant id remote.pair returned");
+  return value;
+}
+var remoteAdapter;
+var init_remote = __esm({
+  "src/dsh/remote.ts"() {
+    "use strict";
+    init_define_BUILTIN_MODULE_DIGESTS();
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    remoteAdapter = {
+      service: "remote",
+      define(host2) {
+        class RemoteService extends Service {
+          constructor(ctx) {
+            super(ctx, "remote");
+          }
+          status() {
+            return host2.broker(this.ctx, "remote", "status", {});
+          }
+          pair(options) {
+            const value = label(options?.label);
+            return host2.broker(this.ctx, "remote", "pair", value === void 0 ? {} : { label: value });
+          }
+          clients() {
+            return host2.broker(this.ctx, "remote", "clients", {});
+          }
+          revoke(id) {
+            return host2.broker(this.ctx, "remote", "revoke", { grant: grant(id) });
+          }
+        }
+        Object.freeze(RemoteService.prototype);
+        return RemoteService;
+      }
+    };
+  }
+});
+
+// src/dsh/adapters.ts
+var DSH_ADAPTERS;
+var init_adapters = __esm({
+  "src/dsh/adapters.ts"() {
+    "use strict";
+    init_define_BUILTIN_MODULE_DIGESTS();
+    init_session_prompt();
+    init_agents();
+    init_remote();
+    DSH_ADAPTERS = [sessionsAdapter, systemPromptAdapter, ...DSH_AGENT_ADAPTERS, remoteAdapter];
+  }
+});
+
 // src/shims/core.ts
 function failureFor(error) {
  if (error instanceof CoreCallError) return error;
@@ -17200,10 +17497,10 @@ function describeError2(error) {
  if (error instanceof Error) return `${error.name}: ${error.message}`;
  return String(error);
 }
-function withDeadline(promise, ms, label) {
+function withDeadline(promise, ms, label2) {
  let timer;
  const deadline = new Promise((_, reject) => {
-    timer = setTimeout(() => reject(new Error(`${label} exceeded ${ms} ms`)), ms);
+    timer = setTimeout(() => reject(new Error(`${label2} exceeded ${ms} ms`)), ms);
    timer.unref();
  });
  return Promise.race([promise, deadline]).finally(() => clearTimeout(timer));
@@ -17300,12 +17597,13 @@ function pendingFibers(fiber) {
  }
  return out;
 }
-var OWNER, REFUSED_SERVICES, PROVIDED_SERVICES, ACTIVATE_DEADLINE_MS, DISPOSE_DEADLINE_MS, ownerStorage, HostRoot;
+var OWNER, REFUSED_SERVICES, PROVIDED_SERVICES, CORDIS_SERVICES, ACTIVATE_DEADLINE_MS, DISPOSE_DEADLINE_MS, ownerStorage, HostRoot;
 var init_root = __esm({
  "src/root.ts"() {
    "use strict";
    init_define_BUILTIN_MODULE_DIGESTS();
    init_composition();
+    init_adapters();
    init_lib2();
    init_protocol();
    init_rpc();
@@ -17329,11 +17627,12 @@ var init_root = __esm({
    OWNER = /* @__PURE__ */ Symbol.for("codewhale.extension-host.owner");
    REFUSED_SERVICES = new Set(compatibility_default.refused_services);
    PROVIDED_SERVICES = new Set(Object.values(compatibility_default.provided_services).flat());
+    CORDIS_SERVICES = new Set(compatibility_default.provided_services.cordis);
    ACTIVATE_DEADLINE_MS = 5e3;
    DISPOSE_DEADLINE_MS = 2e3;
    ownerStorage = new AsyncLocalStorage2();
    HostRoot = class {
-      constructor(rpc2, tier) {
+      constructor(rpc2, tier, adapters = DSH_ADAPTERS) {
        this.rpc = rpc2;
        this.tier = tier;
        const root = new Context();
@@ -17471,28 +17770,6 @@ var init_root = __esm({
            return this.api().delete(key);
          }
        }
-        class SessionsShim extends Service {
-          constructor(ctx) {
-            super(ctx, "sessions");
-          }
-          async flush(session) {
-            const invocation = host2.toolInvocations.getStore();
-            const owner = this.ctx[OWNER];
-            const live = () => invocation && invocation.active && !invocation.signal.aborted && invocation.owner === owner && owner?.state === "active" && !owner.disposing && invocation.ticket !== void 0 && session === invocation.session && session !== void 0;
-            if (!live()) throw new RpcError(ErrorCode.NotAvailable, "sessions.flush requires this live tool invocation’s session");
-            const call = invocation;
-            const run = async () => {
-              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
-              const result2 = await host2.rpc.request("session/checkpoint", { owner: call.owner.ref, ticket: call.ticket }, call.signal);
-              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
-              if (typeof result2 !== "boolean") throw new RpcError(ErrorCode.Internal, "invalid session checkpoint receipt");
-              return result2;
-            };
-            const result = call.pending.then(run);
-            call.pending = result.then(() => void 0, () => void 0);
-            return result;
-          }
-        }
        class UserQuestionsShim extends Service {
          constructor(ctx) {
            super(ctx, "userQuestions");
@@ -17611,185 +17888,49 @@ var init_root = __esm({
            return Promise.race([result, cancelled]).finally(() => signal.removeEventListener("abort", cancel));
          }
        }
-        const SPAWN_PROVIDER = Object.freeze({
-          name: "spawn",
-          inheritsParentContext: false,
-          capabilities: Object.freeze({ persona: true, toolFilter: true, agentOptions: true })
-        });
-        const PERSONA_ORDER = 0;
-        class SubagentsShim extends Service {
-          constructor(ctx) {
-            super(ctx, "subagents");
-          }
-          getProvider(name) {
-            return name === "spawn" ? SPAWN_PROVIDER : void 0;
-          }
-          async startActivation(request) {
-            const invocation = host2.toolInvocations.getStore();
-            const owner = this.ctx[OWNER];
-            const plain = (value, allowed, what) => {
-              if (value === null || typeof value !== "object" || Array.isArray(value) || ![Object.prototype, null].includes(Object.getPrototypeOf(value))) throw new RpcError(ErrorCode.InvalidParams, `expected a plain ${what} object`);
-              const result2 = /* @__PURE__ */ Object.create(null);
-              for (const key of Reflect.ownKeys(value)) {
-                const descriptor = Object.getOwnPropertyDescriptor(value, key);
-                if (typeof key !== "string" || !allowed.includes(key) || !("value" in descriptor)) throw new RpcError(ErrorCode.NotAvailable, `unsupported ${what} property ${String(key)}`);
-                if (descriptor.value !== void 0) result2[key] = descriptor.value;
-              }
-              return result2;
-            };
-            const input = plain(request, ["provider", "label", "childId", "request", "signal", "delivery"], "activation");
-            if (input.provider !== "spawn") throw new RpcError(ErrorCode.NotAvailable, "only the spawn provider is available");
-            const spawn = plain(input.request, ["parent", "prompt", "agentOptions"], "spawn request");
-            const options = spawn.agentOptions === void 0 ? {} : plain(spawn.agentOptions, ["model"], "agentOptions");
-            if (options.model !== void 0 && typeof options.model !== "string") throw new RpcError(ErrorCode.InvalidParams, "agentOptions.model must be a string");
-            const delivery = input.delivery === void 0 ? "parent" : input.delivery;
-            if (delivery !== "caller" && delivery !== "parent") throw new RpcError(ErrorCode.InvalidParams, "delivery must be caller or parent");
-            const childId = input.childId;
-            if (typeof childId !== "string" || !/^[A-Za-z0-9_.:-]{1,128}$/.test(childId)) throw new RpcError(ErrorCode.InvalidParams, "childId must be 1-128 letters, digits, or _.:-");
-            if (!Array.isArray(spawn.prompt) || spawn.prompt.length === 0) throw new RpcError(ErrorCode.InvalidParams, "prompt must be a non-empty content array");
-            const prompt = spawn.prompt.map((block) => {
-              const item = plain(block, ["type", "text"], "prompt block");
-              if (item.type !== "text" || typeof item.text !== "string") throw new RpcError(ErrorCode.NotAvailable, "only text prompt blocks are supported");
-              return item.text;
-            }).join("");
-            if (input.signal !== void 0 && !(input.signal instanceof AbortSignal)) throw new RpcError(ErrorCode.InvalidParams, "signal must be an AbortSignal");
-            if (!invocation || !invocation.active || invocation.signal.aborted || invocation.agent === void 0 || spawn.parent !== invocation.agent) {
-              throw new RpcError(ErrorCode.NotAvailable, "startActivation requires the exact live calling agent as parent");
-            }
-            if (invocation.owner !== owner || owner?.state !== "active" || owner.disposing) throw new RpcError(ErrorCode.NotAvailable, "subagents service owner is no longer current");
-            if (invocation.delegated || invocation.subagentTicket === void 0) throw new RpcError(ErrorCode.NotAvailable, "child agents are only available to a root tool invocation");
-            const signal = input.signal === void 0 ? invocation.signal : AbortSignal.any([invocation.signal, input.signal]);
-            signal.throwIfAborted();
-            let persona;
-            const denied2 = /* @__PURE__ */ new Set();
-            let open2 = true;
-            const sealed = () => {
-              if (!open2) throw new RpcError(ErrorCode.NotAvailable, "the child creation window has closed");
-            };
-            const child = Object.freeze({
-              id: childId,
-              ctx: Object.freeze({
-                systemPrompt: Object.freeze({
-                  getSectionOrder(name) {
-                    sealed();
-                    if (name !== "DEPLOYMENT_PERSONA_PREFIX") throw new RpcError(ErrorCode.NotAvailable, "only the deployment persona slot is available");
-                    return PERSONA_ORDER;
-                  },
-                  section(section) {
-                    sealed();
-                    const value = plain(section, ["name", "order", "text"], "system prompt section");
-                    if (value.name !== PERSONA_PREFIX_SECTION || value.order !== PERSONA_ORDER || typeof value.text !== "string") {
-                      throw new RpcError(ErrorCode.NotAvailable, "only the child deployment persona section is supported");
-                    }
-                    if (persona !== void 0) throw new RpcError(ErrorCode.InvalidParams, "the child persona is already set");
-                    if (Buffer.byteLength(value.text) > 32 * 1024) throw new RpcError(ErrorCode.InvalidParams, "child persona exceeds 32768 bytes");
-                    persona = value.text;
-                    return () => void 0;
-                  }
-                }),
-                tools: Object.freeze({
-                  restrict(filter) {
-                    sealed();
-                    const value = plain(filter, ["deny"], "tool filter");
-                    if (!Array.isArray(value.deny) || value.deny.some((name) => typeof name !== "string" || name === "")) throw new RpcError(ErrorCode.InvalidParams, "deny must be a list of tool names");
-                    for (const name of value.deny) denied2.add(name);
-                    return () => void 0;
-                  }
-                })
-              })
-            });
-            const listeners = (host2.root.events?._hooks?.["agent/created"] ?? []).filter((hook) => !hook.global && hook.ctx?.[OWNER] === owner).map((hook) => hook.callback);
-            try {
-              await Promise.all(listeners.map(async (callback) => callback({ agent: child })));
-            } finally {
-              open2 = false;
-            }
-            signal.throwIfAborted();
-            const call = invocation;
-            const rpc3 = (method, params, abort) => host2.rpc.request(method, { owner: call.owner.ref, ticket: call.subagentTicket, child_id: childId, ...params }, abort);
-            const started = await rpc3("subagent/start", {
-              prompt,
-              ...options.model === void 0 ? {} : { model: options.model },
-              ...persona === void 0 ? {} : { persona },
-              denied_tools: [...denied2],
-              delivery
-            }, signal);
-            if (started === null || typeof started !== "object" || started.child_id !== childId || typeof started.message_id !== "string") {
-              throw new RpcError(ErrorCode.Internal, "invalid child activation receipt");
-            }
-            let result;
-            let disposed;
-            return Object.freeze({
-              childId,
-              messageId: started.message_id,
-              get result() {
-                result ??= rpc3("subagent/result", {}, call.signal).then((value) => {
-                  if (value === null || typeof value !== "object" || typeof value.stop_reason !== "string" || !Array.isArray(value.output)) {
-                    throw new RpcError(ErrorCode.Internal, "invalid child result receipt");
-                  }
-                  return Object.freeze({
-                    stopReason: value.stop_reason,
-                    output: Object.freeze(value.output.map((block) => Object.freeze({ type: "text", text: String(block.text) }))),
-                    ...value.omitted_blocks > 0 ? { diagnostic: `${value.omitted_blocks} non-text output block(s) are not supported` } : {}
-                  });
-                });
-                return result;
-              },
-              dispose() {
-                disposed ??= rpc3("subagent/dispose", {}, call.signal).then(() => void 0);
-                return disposed;
-              }
-            });
-          }
-        }
-        class AgentsShim extends Service {
-          constructor(ctx) {
-            super(ctx, "agents");
-          }
-        }
-        class SystemPromptShim extends Service {
-          constructor(ctx) {
-            super(ctx, "systemPrompt");
-          }
-          section() {
-            throw new RpcError(ErrorCode.NotAvailable, "system prompt sections are only available on a child agent's agent/created context");
-          }
-          getSectionOrder() {
-            throw new RpcError(ErrorCode.NotAvailable, "system prompt sections are only available on a child agent's agent/created context");
-          }
-        }
-        Object.freeze(SubagentsShim.prototype);
-        Object.freeze(AgentsShim.prototype);
-        Object.freeze(SystemPromptShim.prototype);
        Object.freeze(UserQuestionsShim.prototype);
-        Object.freeze(SessionsShim.prototype);
        Object.freeze(StorageShim.prototype);
-        shimClasses.set("tools", ToolsShim);
-        shimClasses.set("commands", CommandsShim);
-        shimClasses.set("prompt", PromptShim);
-        shimClasses.set("storage", StorageShim);
-        shimClasses.set("sessions", SessionsShim);
-        shimClasses.set("userQuestions", UserQuestionsShim);
-        shimClasses.set("subagents", SubagentsShim);
-        shimClasses.set("agents", AgentsShim);
-        shimClasses.set("systemPrompt", SystemPromptShim);
-        shimClasses.set("skills", SkillsShim);
-        shimClasses.set("avatars", AvatarsShim);
-        shimClasses.set("mcp", McpShim);
-        shimClasses.set("shellHooks", ShellHooksShim);
-        root.plugin(ToolsShim);
-        root.plugin(CommandsShim);
-        root.plugin(PromptShim);
-        root.plugin(StorageShim);
-        root.plugin(SessionsShim);
-        root.plugin(UserQuestionsShim);
-        root.plugin(SubagentsShim);
-        root.plugin(AgentsShim);
-        root.plugin(SystemPromptShim);
-        root.plugin(SkillsShim);
-        root.plugin(AvatarsShim);
-        root.plugin(McpShim);
-        root.plugin(ShellHooksShim);
+        const adapterHost = {
+          tier,
+          rpc: rpc2,
+          ownerOf: (ctx) => ctx[OWNER],
+          liveInvocation: (ctx) => {
+            const invocation = host2.toolInvocations.getStore();
+            const owner = ctx[OWNER];
+            return invocation && invocation.active && !invocation.signal.aborted && owner !== void 0 && invocation.owner === owner && owner.state === "active" && !owner.disposing ? invocation : void 0;
+          },
+          log: (level, message, owner) => host2.log(level, message, owner),
+          broker: async (ctx, service, method, input) => {
+            const invocation = adapterHost.liveInvocation(ctx);
+            const ticket = invocation?.brokerTickets.get(service);
+            if (invocation === void 0 || ticket === void 0) throw new RpcError(ErrorCode.NotAvailable, `the ${String(service).slice(0, 64)} broker is only available to a live tool invocation the core gave a ticket for it`);
+            return rpc2.request("dsh/broker", { owner: invocation.owner.ref, ticket, service, method, input }, invocation.signal);
+          }
+        };
+        const shims = /* @__PURE__ */ new Map([
+          ["tools", ToolsShim],
+          ["commands", CommandsShim],
+          ["prompt", PromptShim],
+          ["storage", StorageShim],
+          ["userQuestions", UserQuestionsShim],
+          ["skills", SkillsShim],
+          ["avatars", AvatarsShim],
+          ["mcp", McpShim],
+          ["shellHooks", ShellHooksShim]
+        ]);
+        for (const adapter of adapters) {
+          if (shims.has(adapter.service)) throw new Error(`DSH adapter for \`${adapter.service}\` duplicates a service the host root already provides`);
+          shims.set(adapter.service, adapter.define(adapterHost));
+        }
+        const mismatched = [
+          ...[...shims.keys()].filter((name) => !PROVIDED_SERVICES.has(name)).map((name) => `${name} is installed but not declared in compatibility.json`),
+          ...[...PROVIDED_SERVICES].filter((name) => !CORDIS_SERVICES.has(name) && !shims.has(name)).map((name) => `${name} is declared in compatibility.json but has no installed service`)
+        ];
+        if (mismatched.length > 0) throw new Error(`DSH provided services disagree with the installed services: ${mismatched.join("; ")}`);
+        for (const [name, shim] of shims) {
+          shimClasses.set(name, shim);
+          root.plugin(shim);
+        }
        shimClasses.set("loader", ReviewedLoader);
        installCompositionLoader(root);
      }
@@ -17910,7 +18051,8 @@ var init_root = __esm({
          const plugin = pickPlugin(module);
          const missing = Object.keys(Inject.resolve(plugin.inject)).filter((name) => !PROVIDED_SERVICES.has(name));
          if (missing.length > 0) {
-            throw new Error(`requires ${missing.map((name) => `\`${name}\``).join(", ")}, not provided by the Codewhale extension host in this phase`);
+            const owned = missing.filter((name) => REFUSED_SERVICES.has(name));
+            throw new Error(`requires ${missing.map((name) => `\`${name}\``).join(", ")}, not provided by the Codewhale extension host in this phase` + (owned.length > 0 ? `; ${owned.map((name) => `\`${name}\``).join(", ")} belong${owned.length === 1 ? "s" : ""} to the Codewhale core and no reviewed bridge exposes ${owned.length === 1 ? "it" : "them"} yet` : ""));
          }
          const ownerCtx = this.root.extend({ [OWNER]: owner });
          const fiber = ownerStorage.run(owner, () => ownerCtx.plugin(plugin, params.config ?? {}));
@@ -18059,6 +18201,7 @@ var init_root = __esm({
          agent,
          questionTicket: identity?.question_ticket,
          subagentTicket: identity?.subagent_ticket,
+          brokerTickets: new Map((identity?.broker_tickets ?? []).map(({ service, ticket: ticket2 }) => [service, ticket2])),
          callerTools: Object.freeze([...identity?.caller_tools ?? []]),
          delegated: identity?.agent_id !== void 0,
          ticket: identity?.checkpoint_ticket,
@@ -755,7 +755,7 @@ var init_lib2 = __esm({
          } else throw new TypeError("Invalid effect");
        }, runner.getOuterStack);
      }
-      effect(execute, label = "anonymous") {
+      effect(execute, label2 = "anonymous") {
        this.assertActive();
        if (this.state === 5) throw new CordisError("INACTIVE_EFFECT");
        const disposables = [];
@@ -773,7 +773,7 @@ var init_lib2 = __esm({
          return disposalTask = task2;
        };
        const meta = {
-          label,
+          label: label2,
          children: []
        };
        const runner = {
@@ -1195,7 +1195,7 @@ var init_lib2 = __esm({
        };
        return dispatch();
      }
-      register(label, name, callback, options) {
+      register(label2, name, callback, options) {
        const method = options.prepend ? "unshift" : "push";
        return this.ctx.fiber.effect(() => {
          (this._hooks[name] ??= [])[method]({
@@ -1204,7 +1204,7 @@ var init_lib2 = __esm({
            ...options
          });
          return () => this.unregister(name, callback);
-        }, label);
+        }, label2);
      }
      unregister(name, callback) {
        const hooks = this._hooks[name];
@@ -1233,8 +1233,8 @@ var init_lib2 = __esm({
        listener = this.ctx.reflect.bind(listener);
        const result = this.bail(this.ctx, "internal/listener", name, listener, options);
        if (result) return result;
-        const label = `ctx.on(${typeof name === "string" ? JSON.stringify(name) : name.toString()})`;
-        return this.register(label, name, listener, options);
+        const label2 = `ctx.on(${typeof name === "string" ? JSON.stringify(name) : name.toString()})`;
+        return this.register(label2, name, listener, options);
      }
      /**
      * Register an event listener that disposes itself after the first call.
@@ -1979,9 +1979,9 @@ var init_lib2 = __esm({
      * @param label — scope label to join; defaults to a fresh unique symbol.
      * @returns a child context whose `name` service resolves in the new scope.
      */
-      isolate(name, label) {
+      isolate(name, label2) {
        const shadow = Object.create(this[symbols.isolate]);
-        shadow[name] = label ?? Symbol(name);
+        shadow[name] = label2 ?? Symbol(name);
        return this.extend({ [symbols.isolate]: shadow });
      }
      intercept(name, config) {
@@ -2621,14 +2621,14 @@ function isolate(ctx) {
  const delims = /* @__PURE__ */ Object.create(null);
  function access2(entry, name, create = false) {
    let realm;
-    const label = entry.options.isolate?.[name];
-    if (!label) return;
-    if (label === true) {
+    const label2 = entry.options.isolate?.[name];
+    if (!label2) return;
+    if (label2 === true) {
      realm = entry.realm ??= new LocalRealm(entry);
    } else if (create) {
-      realm = realms[label] ??= new GlobalRealm(label);
+      realm = realms[label2] ??= new GlobalRealm(label2);
    } else {
-      realm = realms[label];
+      realm = realms[label2];
    }
    return realm?.access(name, create);
  }
@@ -2685,10 +2685,10 @@ function isolate(ctx) {
    }
  });
  ctx.on("loader/partial-dispose", (entry, legacy, active) => {
-    for (const [name, label] of Object.entries(legacy.isolate ?? {})) {
-      if (label === true) continue;
-      if (active && entry.options.isolate?.[name] === label) continue;
-      const realm = realms[label];
+    for (const [name, label2] of Object.entries(legacy.isolate ?? {})) {
+      if (label2 === true) continue;
+      if (active && entry.options.isolate?.[name] === label2) continue;
+      const realm = realms[label2];
      if (!realm) continue;
      for (const entry2 of ctx.loader.entries()) {
        if (entry2.options.isolate?.[name] === realm.label) return;
@@ -2732,9 +2732,9 @@ var init_isolate = __esm({
      }
    };
    GlobalRealm = class extends Realm {
-      constructor(label) {
+      constructor(label2) {
        super();
-        this.label = label;
+        this.label = label2;
      }
      label;
      get suffix() {
@@ -5423,14 +5423,14 @@ function requireDumper() {
    let hasFoldableLine = false;
    const shouldTrackWidth = lineWidth !== -1;
    let previousLineBreak = -1;
-    let plain2 = isPlainSafeFirst(codePointAt(string, 0)) && isPlainSafeLast(codePointAt(string, string.length - 1));
+    let plain3 = isPlainSafeFirst(codePointAt(string, 0)) && isPlainSafeLast(codePointAt(string, string.length - 1));
    if (singleLineOnly || forceQuotes) {
      for (i2 = 0; i2 < string.length; char >= 65536 ? i2 += 2 : i2++) {
        char = codePointAt(string, i2);
        if (!isPrintable(char)) {
          return STYLE_DOUBLE;
        }
-        plain2 = plain2 && isPlainSafe(char, prevChar, inblock);
+        plain3 = plain3 && isPlainSafe(char, prevChar, inblock);
        prevChar = char;
      }
    } else {
@@ -5446,13 +5446,13 @@ function requireDumper() {
        } else if (!isPrintable(char)) {
          return STYLE_DOUBLE;
        }
-        plain2 = plain2 && isPlainSafe(char, prevChar, inblock);
+        plain3 = plain3 && isPlainSafe(char, prevChar, inblock);
        prevChar = char;
      }
      hasFoldableLine = hasFoldableLine || shouldTrackWidth && (i2 - previousLineBreak - 1 > lineWidth && string[previousLineBreak + 1] !== " ");
    }
    if (!hasLineBreak && !hasFoldableLine) {
-      if (plain2 && !forceQuotes && !testAmbiguousType(string)) {
+      if (plain3 && !forceQuotes && !testAmbiguousType(string)) {
        return STYLE_PLAIN;
      }
      return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : STYLE_SINGLE;
@@ -7348,9 +7348,9 @@ var init_acorn = __esm({
    keywordRelationalOperator = /^in(stanceof)?$/;
    nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
    nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
-    TokenType = function TokenType2(label, conf) {
+    TokenType = function TokenType2(label2, conf) {
      if (conf === void 0) conf = {};
-      this.label = label;
+      this.label = label2;
      this.keyword = conf.keyword;
      this.beforeExpr = !!conf.beforeExpr;
      this.startsExpr = !!conf.startsExpr;
@@ -8399,8 +8399,8 @@ var init_acorn = __esm({
    };
    pp$8.parseLabeledStatement = function(node, maybeName, expr, context) {
      for (var i$1 = 0, list2 = this.labels; i$1 < list2.length; i$1 += 1) {
-        var label = list2[i$1];
-        if (label.name === maybeName) {
+        var label2 = list2[i$1];
+        if (label2.name === maybeName) {
          this.raise(expr.start, "Label '" + maybeName + "' is already declared");
        }
      }
@@ -12773,7 +12773,8 @@ var init_compatibility = __esm({
          "prompt",
          "avatars",
          "mcp",
-          "shellHooks"
+          "shellHooks",
+          "remote"
        ]
      },
      refused_services: [
@@ -13229,11 +13230,23 @@ var init_prompt = __esm({
 });

 // src/protocol.generated.ts
-var MAGIC_ASCII;
+var MAGIC_ASCII, ErrorCode;
 var init_protocol_generated = __esm({
  "src/protocol.generated.ts"() {
    "use strict";
    MAGIC_ASCII = "CWX1";
+    ErrorCode = {
+      ParseError: -32700,
+      InvalidRequest: -32600,
+      MethodNotFound: -32601,
+      InvalidParams: -32602,
+      Internal: -32603,
+      ExecutionFailed: -32e3,
+      NotAvailable: -32001,
+      Refused: -32002,
+      Denied: -32003,
+      Cancelled: -32800
+    };
  }
 });

@@ -13249,10 +13262,88 @@ var init_protocol = __esm({
 });

 // src/rpc.ts
+var RpcError;
 var init_rpc = __esm({
  "src/rpc.ts"() {
    "use strict";
    init_protocol();
+    RpcError = class extends Error {
+      constructor(code, message, data2) {
+        super(message);
+        this.code = code;
+        this.data = data2;
+        this.name = "RpcError";
+      }
+      code;
+      data;
+      toWire() {
+        return this.data === void 0 ? { code: this.code, message: this.message } : { code: this.code, message: this.message, data: this.data };
+      }
+    };
+  }
+});
+
+// src/dsh/session-prompt.ts
+function checkpointCall(host, ctx, session) {
+  const invocation = host.liveInvocation(ctx);
+  const ticket = invocation?.ticket;
+  return invocation !== void 0 && typeof ticket === "string" && ticket.length > 0 && session !== void 0 && session === invocation.session ? invocation : void 0;
+}
+var CHILD_ONLY, sessionsAdapter, systemPromptAdapter;
+var init_session_prompt = __esm({
+  "src/dsh/session-prompt.ts"() {
+    "use strict";
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    CHILD_ONLY = "system prompt sections are only available on a child agent's agent/created context";
+    sessionsAdapter = {
+      service: "sessions",
+      define(host) {
+        class SessionsService extends Service {
+          constructor(ctx) {
+            super(ctx, "sessions");
+          }
+          async flush(session) {
+            const ctx = this.ctx;
+            const call = checkpointCall(host, ctx, session);
+            if (call === void 0) throw new RpcError(ErrorCode.NotAvailable, "sessions.flush requires this live tool invocation’s session");
+            const owner = call.owner;
+            const live = () => checkpointCall(host, ctx, session) === call && !call.signal.aborted;
+            const run = async () => {
+              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
+              const result2 = await host.rpc.request("session/checkpoint", { owner: owner.ref, ticket: call.ticket }, call.signal);
+              if (!live()) throw new RpcError(ErrorCode.NotAvailable, "session checkpoint invocation ended");
+              if (typeof result2 !== "boolean") throw new RpcError(ErrorCode.Internal, "invalid session checkpoint receipt");
+              return result2;
+            };
+            const result = call.pending.then(run);
+            call.pending = result.then(() => void 0, () => void 0);
+            return result;
+          }
+        }
+        Object.freeze(SessionsService.prototype);
+        return SessionsService;
+      }
+    };
+    systemPromptAdapter = {
+      service: "systemPrompt",
+      define() {
+        class SystemPromptService extends Service {
+          constructor(ctx) {
+            super(ctx, "systemPrompt");
+          }
+          section() {
+            throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY);
+          }
+          getSectionOrder() {
+            throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY);
+          }
+        }
+        Object.freeze(SystemPromptService.prototype);
+        return SystemPromptService;
+      }
+    };
  }
 });

@@ -13884,11 +13975,12 @@ var init_lib3 = __esm({
 });

 // src/dsh/dsh-message-compat.js
-var HarnessError, UserQuestionError;
+var PERSONA_PREFIX_SECTION, HarnessError, UserQuestionError;
 var init_dsh_message_compat = __esm({
  "src/dsh/dsh-message-compat.js"() {
    "use strict";
    init_lib3();
+    PERSONA_PREFIX_SECTION = "deployment:persona-prefix";
    HarnessError = class extends Error {
      code;
      constructor(message, code, options) {
@@ -13908,6 +14000,223 @@ var init_dsh_message_compat = __esm({
  }
 });

+// src/dsh/agents.ts
+function plain(value, allowed, what) {
+  if (value === null || typeof value !== "object" || Array.isArray(value) || ![Object.prototype, null].includes(Object.getPrototypeOf(value))) throw new RpcError(ErrorCode.InvalidParams, `expected a plain ${what} object`);
+  const result = /* @__PURE__ */ Object.create(null);
+  for (const key of Reflect.ownKeys(value)) {
+    const descriptor = Object.getOwnPropertyDescriptor(value, key);
+    if (typeof key !== "string" || !allowed.includes(key) || !("value" in descriptor)) throw new RpcError(ErrorCode.NotAvailable, `unsupported ${what} property ${String(key)}`);
+    if (descriptor.value !== void 0) result[key] = descriptor.value;
+  }
+  return result;
+}
+function defineSubagents(host) {
+  class SubagentsShim extends Service {
+    constructor(ctx) {
+      super(ctx, "subagents");
+    }
+    getProvider(name) {
+      return name === "spawn" ? SPAWN_PROVIDER : void 0;
+    }
+    async startActivation(request) {
+      const owner = host.ownerOf(this.ctx);
+      const input = plain(request, ["provider", "label", "childId", "request", "signal", "delivery"], "activation");
+      if (input.provider !== "spawn") throw new RpcError(ErrorCode.NotAvailable, "only the spawn provider is available");
+      const spawn = plain(input.request, ["parent", "prompt", "agentOptions"], "spawn request");
+      const options = spawn.agentOptions === void 0 ? {} : plain(spawn.agentOptions, ["model"], "agentOptions");
+      if (options.model !== void 0 && typeof options.model !== "string") throw new RpcError(ErrorCode.InvalidParams, "agentOptions.model must be a string");
+      const delivery = input.delivery === void 0 ? "parent" : input.delivery;
+      if (delivery !== "caller" && delivery !== "parent") throw new RpcError(ErrorCode.InvalidParams, "delivery must be caller or parent");
+      const childId = input.childId;
+      if (typeof childId !== "string" || !/^[A-Za-z0-9_.:-]{1,128}$/.test(childId)) throw new RpcError(ErrorCode.InvalidParams, "childId must be 1-128 letters, digits, or _.:-");
+      if (!Array.isArray(spawn.prompt) || spawn.prompt.length === 0) throw new RpcError(ErrorCode.InvalidParams, "prompt must be a non-empty content array");
+      const prompt = spawn.prompt.map((block) => {
+        const item = plain(block, ["type", "text"], "prompt block");
+        if (item.type !== "text" || typeof item.text !== "string") throw new RpcError(ErrorCode.NotAvailable, "only text prompt blocks are supported");
+        return item.text;
+      }).join("");
+      if (input.signal !== void 0 && !(input.signal instanceof AbortSignal)) throw new RpcError(ErrorCode.InvalidParams, "signal must be an AbortSignal");
+      const invocation = host.liveInvocation(this.ctx);
+      if (!invocation || invocation.agent === void 0 || spawn.parent !== invocation.agent) {
+        throw new RpcError(ErrorCode.NotAvailable, "startActivation requires the exact live calling agent as parent");
+      }
+      if (invocation.owner !== owner) throw new RpcError(ErrorCode.NotAvailable, "subagents service owner is no longer current");
+      if (invocation.delegated || invocation.subagentTicket === void 0) throw new RpcError(ErrorCode.NotAvailable, "child agents are only available to a root tool invocation");
+      const signal = input.signal === void 0 ? invocation.signal : AbortSignal.any([invocation.signal, input.signal]);
+      signal.throwIfAborted();
+      let persona;
+      const denied = /* @__PURE__ */ new Set();
+      let open = true;
+      const sealed = () => {
+        if (!open) throw new RpcError(ErrorCode.NotAvailable, "the child creation window has closed");
+      };
+      const child = Object.freeze({
+        id: childId,
+        ctx: Object.freeze({
+          systemPrompt: Object.freeze({
+            getSectionOrder(name) {
+              sealed();
+              if (name !== "DEPLOYMENT_PERSONA_PREFIX") throw new RpcError(ErrorCode.NotAvailable, "only the deployment persona slot is available");
+              return PERSONA_ORDER;
+            },
+            section(section) {
+              sealed();
+              const value = plain(section, ["name", "order", "text"], "system prompt section");
+              if (value.name !== PERSONA_PREFIX_SECTION || value.order !== PERSONA_ORDER || typeof value.text !== "string") {
+                throw new RpcError(ErrorCode.NotAvailable, "only the child deployment persona section is supported");
+              }
+              if (persona !== void 0) throw new RpcError(ErrorCode.InvalidParams, "the child persona is already set");
+              if (Buffer.byteLength(value.text) > 32 * 1024) throw new RpcError(ErrorCode.InvalidParams, "child persona exceeds 32768 bytes");
+              persona = value.text;
+              return () => void 0;
+            }
+          }),
+          tools: Object.freeze({
+            restrict(filter) {
+              sealed();
+              const value = plain(filter, ["deny"], "tool filter");
+              if (!Array.isArray(value.deny) || value.deny.some((name) => typeof name !== "string" || name === "")) throw new RpcError(ErrorCode.InvalidParams, "deny must be a list of tool names");
+              for (const name of value.deny) denied.add(name);
+              return () => void 0;
+            }
+          })
+        })
+      });
+      const listeners = (this.ctx.root?.events?._hooks?.["agent/created"] ?? []).filter((hook) => !hook.global && hook.ctx !== void 0 && host.ownerOf(hook.ctx) === owner).map((hook) => hook.callback);
+      try {
+        await Promise.all(listeners.map(async (callback) => callback({ agent: child })));
+      } finally {
+        open = false;
+      }
+      signal.throwIfAborted();
+      const call = invocation;
+      const rpc = (method, params, abort) => host.rpc.request(method, { owner: call.owner.ref, ticket: call.subagentTicket, child_id: childId, ...params }, abort);
+      const started = await rpc("subagent/start", {
+        prompt,
+        ...options.model === void 0 ? {} : { model: options.model },
+        ...persona === void 0 ? {} : { persona },
+        denied_tools: [...denied],
+        delivery
+      }, signal);
+      if (started === null || typeof started !== "object" || started.child_id !== childId || typeof started.message_id !== "string") {
+        throw new RpcError(ErrorCode.Internal, "invalid child activation receipt");
+      }
+      let result;
+      let disposed;
+      return Object.freeze({
+        childId,
+        messageId: started.message_id,
+        get result() {
+          result ??= rpc("subagent/result", {}, call.signal).then((value) => {
+            if (value === null || typeof value !== "object" || typeof value.stop_reason !== "string" || !Array.isArray(value.output)) {
+              throw new RpcError(ErrorCode.Internal, "invalid child result receipt");
+            }
+            return Object.freeze({
+              stopReason: value.stop_reason,
+              output: Object.freeze(value.output.map((block) => Object.freeze({ type: "text", text: String(block.text) }))),
+              ...value.omitted_blocks > 0 ? { diagnostic: `${value.omitted_blocks} non-text output block(s) are not supported` } : {}
+            });
+          });
+          return result;
+        },
+        dispose() {
+          disposed ??= rpc("subagent/dispose", {}, call.signal).then(() => void 0);
+          return disposed;
+        }
+      });
+    }
+  }
+  Object.freeze(SubagentsShim.prototype);
+  return SubagentsShim;
+}
+function defineAgents() {
+  class AgentsShim extends Service {
+    constructor(ctx) {
+      super(ctx, "agents");
+    }
+  }
+  Object.freeze(AgentsShim.prototype);
+  return AgentsShim;
+}
+var SPAWN_PROVIDER, PERSONA_ORDER, DSH_AGENT_ADAPTERS;
+var init_agents = __esm({
+  "src/dsh/agents.ts"() {
+    "use strict";
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    init_dsh_message_compat();
+    SPAWN_PROVIDER = Object.freeze({
+      name: "spawn",
+      inheritsParentContext: false,
+      capabilities: Object.freeze({ persona: true, toolFilter: true, agentOptions: true })
+    });
+    PERSONA_ORDER = 0;
+    DSH_AGENT_ADAPTERS = Object.freeze([
+      { service: "subagents", define: defineSubagents },
+      { service: "agents", define: defineAgents }
+    ]);
+  }
+});
+
+// src/dsh/remote.ts
+function label(value) {
+  if (value === void 0) return void 0;
+  if (typeof value !== "string") throw new RpcError(ErrorCode.InvalidParams, "remote.pair label must be a string");
+  return value;
+}
+function grant(value) {
+  if (typeof value !== "string" || value.length === 0 || value.length > 128) throw new RpcError(ErrorCode.InvalidParams, "remote.revoke needs the grant id remote.pair returned");
+  return value;
+}
+var remoteAdapter;
+var init_remote = __esm({
+  "src/dsh/remote.ts"() {
+    "use strict";
+    init_lib2();
+    init_protocol();
+    init_rpc();
+    remoteAdapter = {
+      service: "remote",
+      define(host) {
+        class RemoteService extends Service {
+          constructor(ctx) {
+            super(ctx, "remote");
+          }
+          status() {
+            return host.broker(this.ctx, "remote", "status", {});
+          }
+          pair(options) {
+            const value = label(options?.label);
+            return host.broker(this.ctx, "remote", "pair", value === void 0 ? {} : { label: value });
+          }
+          clients() {
+            return host.broker(this.ctx, "remote", "clients", {});
+          }
+          revoke(id) {
+            return host.broker(this.ctx, "remote", "revoke", { grant: grant(id) });
+          }
+        }
+        Object.freeze(RemoteService.prototype);
+        return RemoteService;
+      }
+    };
+  }
+});
+
+// src/dsh/adapters.ts
+var DSH_ADAPTERS;
+var init_adapters = __esm({
+  "src/dsh/adapters.ts"() {
+    "use strict";
+    init_session_prompt();
+    init_agents();
+    init_remote();
+    DSH_ADAPTERS = [sessionsAdapter, systemPromptAdapter, ...DSH_AGENT_ADAPTERS, remoteAdapter];
+  }
+});
+
 // src/dsh/dsh-tools-compat.js
 var init_dsh_tools_compat = __esm({
  "src/dsh/dsh-tools-compat.js"() {
@@ -13989,11 +14298,12 @@ var init_commands = __esm({

 // src/root.ts
 import { AsyncLocalStorage as AsyncLocalStorage2 } from "node:async_hooks";
-var REFUSED_SERVICES, PROVIDED_SERVICES, ownerStorage;
+var REFUSED_SERVICES, PROVIDED_SERVICES, CORDIS_SERVICES, ownerStorage;
 var init_root = __esm({
  "src/root.ts"() {
    "use strict";
    init_composition();
+    init_adapters();
    init_protocol();
    init_rpc();
    init_dsh_message_compat();
@@ -14015,6 +14325,7 @@ var init_root = __esm({
    init_commands();
    REFUSED_SERVICES = new Set(compatibility_default.refused_services);
    PROVIDED_SERVICES = new Set(Object.values(compatibility_default.provided_services).flat());
+    CORDIS_SERVICES = new Set(compatibility_default.provided_services.cordis);
    ownerStorage = new AsyncLocalStorage2();
  }
 });
@@ -14131,16 +14442,16 @@ function entryListProblem(rows, at2 = "") {
    return at2 === "" ? "the composition must be a top-level list of plugin rows" : `group ${at2} must hold a list of plugin rows`;
  }
  for (const [index, row] of rows.entries()) {
-    const label = at2 === "" ? `row ${String(index + 1)}` : `${at2} row ${String(index + 1)}`;
+    const label2 = at2 === "" ? `row ${String(index + 1)}` : `${at2} row ${String(index + 1)}`;
    if (typeof row !== "object" || row === null || Array.isArray(row)) {
-      return `${label} is not a plugin row (expected a map with a "name")`;
+      return `${label2} is not a plugin row (expected a map with a "name")`;
    }
    const { name, group, config } = row;
    if (typeof name !== "string" || name === "") {
-      return `${label} names no plugin (a "name" string is required)`;
+      return `${label2} names no plugin (a "name" string is required)`;
    }
    if (group === true) {
-      const nested = entryListProblem(config, label);
+      const nested = entryListProblem(config, label2);
      if (nested !== void 0) return nested;
    }
  }
@@ -14163,8 +14474,8 @@ async function unresolvableRows(rows, presetBase, harnessBase, resolves, io, at2
      continue;
    }
    if (await rowResolves(classifyRowSpecifier(row.name), presetBase, harnessBase, resolves, io)) continue;
-    const label = typeof row.id === "string" && row.id !== "" ? `row "${row.id}"` : positional;
-    found.push({ label, name: row.name });
+    const label2 = typeof row.id === "string" && row.id !== "" ? `row "${row.id}"` : positional;
+    found.push({ label: label2, name: row.name });
  }
  return found;
 }
@@ -14335,7 +14646,7 @@ var init_composition_inventory = __esm({
 import { createHash as createHash2 } from "node:crypto";
 import { resolve as resolve4, relative as relative2, dirname as dirname4, sep as sep2 } from "node:path";
 import { fileURLToPath as fileURLToPath4, pathToFileURL as pathToFileURL5 } from "node:url";
-function plain(path) {
+function plain2(path) {
  return typeof path === "string" && path.length > 0 && path.length <= 4096 && !/[\\:\u0000-\u001f\u007f]/u.test(path) && !path.startsWith("/") && path.split("/").every((p) => p !== "" && p !== "." && p !== "..");
 }
 function fail(message) {
@@ -14375,7 +14686,7 @@ function containedPackageModule(name, documents, files) {
    entry = value && typeof value === "object" && !Array.isArray(value) && Object.keys(value).some((k) => k.startsWith(".")) ? target(value[subpath]) : subpath === "." ? target(value) : void 0;
  } else if (subpath === ".") entry = typeof data2.main === "string" ? data2.main : "./index.js";
  else entry = subpath;
-  if (typeof entry !== "string" || !entry.startsWith("./") || !plain(entry.slice(2))) return;
+  if (typeof entry !== "string" || !entry.startsWith("./") || !plain2(entry.slice(2))) return;
  const path = `${packageRoot}/${entry.slice(2)}`;
  if (!/\.(mjs|js|mts)$/.test(path) || !SHA.test(files[path] ?? "")) return;
  return { name, path, sha256: files[path] };
@@ -14388,20 +14699,20 @@ async function reviewAgentPresets(input) {
  const baseUrl = pathToFileURL5(`${base}${sep2}`).href;
  function key(path) {
    const inside = relative2(base, path).split(sep2).join("/");
-    if (!plain(inside)) fail("path escapes the admitted source root");
+    if (!plain2(inside)) fail("path escapes the admitted source root");
    return inside;
  }
  const documents = /* @__PURE__ */ new Map();
  let bytes = 0;
  for (const doc of input.documents) {
-    if (!plain(doc.path) || !SHA.test(doc.sha256) || files[doc.path] !== doc.sha256 || hash(doc.source) !== doc.sha256 || documents.has(doc.path)) fail("document changed or is outside the source receipt");
+    if (!plain2(doc.path) || !SHA.test(doc.sha256) || files[doc.path] !== doc.sha256 || hash(doc.source) !== doc.sha256 || documents.has(doc.path)) fail("document changed or is outside the source receipt");
    bytes += Buffer.byteLength(doc.source);
    if (Buffer.byteLength(doc.source) > 1024 * 1024 || bytes > 4 * 1024 * 1024) fail("documents exceed their bound");
    documents.set(doc.path, doc.source);
  }
  const directories = new Set(input.directories);
-  for (const path of directories) if (!plain(path)) fail("invalid source directory");
-  for (const path of Object.keys(files)) if (!plain(path) || !SHA.test(files[path])) fail("invalid source file receipt");
+  for (const path of directories) if (!plain2(path)) fail("invalid source directory");
+  for (const path of Object.keys(files)) if (!plain2(path) || !SHA.test(files[path])) fail("invalid source file receipt");
  const invalid = /* @__PURE__ */ new Set();
  const parsed = /* @__PURE__ */ new Map();
  const io = {
@@ -14466,7 +14777,7 @@ async function reviewAgentPresets(input) {
  }
  if (config.roots !== void 0 && !Array.isArray(config.roots)) fail("roots must be a literal list");
  for (const root of config.roots ?? []) {
-    if (!root || Object.keys(root).some((k) => !["path", "trust"].includes(k)) || !plain(root.path) || !["system", "user"].includes(root.trust)) fail("configured roots must stay inside the admitted package");
+    if (!root || Object.keys(root).some((k) => !["path", "trust"].includes(k)) || !plain2(root.path) || !["system", "user"].includes(root.trust)) fail("configured roots must stay inside the admitted package");
    if (!directories.has(root.path)) fail("configured preset root was not admitted");
    roots.push({ path: resolve4(base, root.path), trust: root.trust });
  }
@@ -18,6 +18,7 @@ var ErrorCode = {
  Denied: -32003,
  Cancelled: -32800
 };
+var DSH_SERVICES = ["workspace", "llm", "network", "settings", "catalog", "terminal", "remote"];
 var METHODS = [
  { name: "host/initialize", direction: "core_to_host", request: true, params: "InitializeParams", tiers: ["plugin", "builtin"] },
  { name: "host/ping", direction: "core_to_host", request: true, params: "EmptyParams", tiers: ["plugin", "builtin"] },
@@ -42,6 +43,7 @@ var METHODS = [
  { name: "subagent/start", direction: "host_to_core", request: true, params: "SubagentStartParams", tiers: ["plugin", "builtin"] },
  { name: "subagent/result", direction: "host_to_core", request: true, params: "SubagentHandleParams", tiers: ["plugin", "builtin"] },
  { name: "subagent/dispose", direction: "host_to_core", request: true, params: "SubagentHandleParams", tiers: ["plugin", "builtin"] },
+  { name: "dsh/broker", direction: "host_to_core", request: true, params: "DshBrokerParams", tiers: ["plugin", "builtin"] },
  { name: "proc/launch", direction: "host_to_core", request: true, params: "ProcLaunchParams", tiers: ["builtin"] },
  { name: "proc/read", direction: "host_to_core", request: true, params: "ProcSessionParams", tiers: ["builtin"] },
  { name: "proc/write", direction: "host_to_core", request: true, params: "ProcWriteParams", tiers: ["builtin"] },
@@ -82,6 +84,16 @@ var SHAPES = {
    required: { owner: { ref: "OwnerRef" } },
    optional: { entry: { ref: "EntryRef" } }
  },
+  DshBrokerParams: {
+    strict: true,
+    required: { owner: { ref: "OwnerRef" }, ticket: "string", service: "string", method: "string", input: "json" },
+    optional: {}
+  },
+  DshBrokerTicketWire: {
+    strict: true,
+    required: { service: "string", ticket: "string" },
+    optional: {}
+  },
  EmptyParams: {
    strict: true,
    required: {},
@@ -245,7 +257,7 @@ var SHAPES = {
  ToolCallParams: {
    strict: false,
    required: { handle: "uint", call_id: "string", input: "json", deadline_ms: "uint" },
-    optional: { workspace: "string", ticket: "string", checkpoint_ticket: "string", question_ticket: "string", subagent_ticket: "string", caller_tools: { items: "string" }, session_id: "string", agent_id: "string", origin_turn_id: "string" }
+    optional: { workspace: "string", ticket: "string", checkpoint_ticket: "string", question_ticket: "string", subagent_ticket: "string", broker_tickets: { items: { ref: "DshBrokerTicketWire" } }, caller_tools: { items: "string" }, session_id: "string", agent_id: "string", origin_turn_id: "string" }
  },
  UnregisterParams: {
    strict: true,
@@ -415,6 +427,7 @@ function validateMessage(value, direction, tier, methods = METHODS) {
  return value;
 }
 export {
+  DSH_SERVICES,
  ErrorCode,
  FrameDecoder,
  FrameError,
@@ -39,6 +39,7 @@ var METHODS = [
  { name: "subagent/start", direction: "host_to_core", request: true, params: "SubagentStartParams", tiers: ["plugin", "builtin"] },
  { name: "subagent/result", direction: "host_to_core", request: true, params: "SubagentHandleParams", tiers: ["plugin", "builtin"] },
  { name: "subagent/dispose", direction: "host_to_core", request: true, params: "SubagentHandleParams", tiers: ["plugin", "builtin"] },
+  { name: "dsh/broker", direction: "host_to_core", request: true, params: "DshBrokerParams", tiers: ["plugin", "builtin"] },
  { name: "proc/launch", direction: "host_to_core", request: true, params: "ProcLaunchParams", tiers: ["builtin"] },
  { name: "proc/read", direction: "host_to_core", request: true, params: "ProcSessionParams", tiers: ["builtin"] },
  { name: "proc/write", direction: "host_to_core", request: true, params: "ProcWriteParams", tiers: ["builtin"] },
@@ -79,6 +80,16 @@ var SHAPES = {
    required: { owner: { ref: "OwnerRef" } },
    optional: { entry: { ref: "EntryRef" } }
  },
+  DshBrokerParams: {
+    strict: true,
+    required: { owner: { ref: "OwnerRef" }, ticket: "string", service: "string", method: "string", input: "json" },
+    optional: {}
+  },
+  DshBrokerTicketWire: {
+    strict: true,
+    required: { service: "string", ticket: "string" },
+    optional: {}
+  },
  EmptyParams: {
    strict: true,
    required: {},
@@ -242,7 +253,7 @@ var SHAPES = {
  ToolCallParams: {
    strict: false,
    required: { handle: "uint", call_id: "string", input: "json", deadline_ms: "uint" },
-    optional: { workspace: "string", ticket: "string", checkpoint_ticket: "string", question_ticket: "string", subagent_ticket: "string", caller_tools: { items: "string" }, session_id: "string", agent_id: "string", origin_turn_id: "string" }
+    optional: { workspace: "string", ticket: "string", checkpoint_ticket: "string", question_ticket: "string", subagent_ticket: "string", broker_tickets: { items: { ref: "DshBrokerTicketWire" } }, caller_tools: { items: "string" }, session_id: "string", agent_id: "string", origin_turn_id: "string" }
  },
  UnregisterParams: {
    strict: true,
@@ -0,0 +1,24 @@
+import type { Service } from '@deepseek-ai/cordis'
+import type { DshService } from '../protocol.generated.ts'
+import type { OwnerRecord, ToolInvocation } from '../root.ts'
+import type { RpcPeer } from '../rpc.ts'
+import type { HostTier } from '../tier.ts'
+import { sessionsAdapter, systemPromptAdapter } from './session-prompt.ts'
+import { DSH_AGENT_ADAPTERS } from './agents.ts'
+import { remoteAdapter } from './remote.ts'
+
+export interface AdapterHost {
+  readonly tier: HostTier
+  readonly rpc: RpcPeer
+  ownerOf(ctx: unknown): OwnerRecord | undefined
+  liveInvocation(ctx: unknown): ToolInvocation | undefined
+  broker(ctx: unknown, service: DshService, method: string, input: unknown): Promise<unknown>
+  log(level: 'info' | 'warn' | 'error', message: string, owner?: OwnerRecord): void
+}
+
+export interface DshAdapter {
+  readonly service: string
+  define(host: AdapterHost): new (ctx: any) => Service
+}
+
+export const DSH_ADAPTERS: readonly DshAdapter[] = [sessionsAdapter, systemPromptAdapter, ...DSH_AGENT_ADAPTERS, remoteAdapter]
@@ -0,0 +1,154 @@
+import { Service } from '@deepseek-ai/cordis'
+import { ErrorCode } from '../protocol.ts'
+import { RpcError } from '../rpc.ts'
+import { PERSONA_PREFIX_SECTION } from './dsh-message-compat.js'
+import type { AdapterHost, DshAdapter } from './adapters.ts'
+
+const SPAWN_PROVIDER = Object.freeze({
+  name: 'spawn',
+  inheritsParentContext: false,
+  capabilities: Object.freeze({ persona: true, toolFilter: true, agentOptions: true }),
+})
+const PERSONA_ORDER = 0
+
+function plain(value: unknown, allowed: string[], what: string): Record<string, unknown> {
+  if (value === null || typeof value !== 'object' || Array.isArray(value)
+    || ![Object.prototype, null].includes(Object.getPrototypeOf(value))) throw new RpcError(ErrorCode.InvalidParams, `expected a plain ${what} object`)
+  const result: Record<string, unknown> = Object.create(null)
+  for (const key of Reflect.ownKeys(value)) {
+    const descriptor = Object.getOwnPropertyDescriptor(value, key)!
+    if (typeof key !== 'string' || !allowed.includes(key) || !('value' in descriptor)) throw new RpcError(ErrorCode.NotAvailable, `unsupported ${what} property ${String(key)}`)
+    if (descriptor.value !== undefined) result[key] = descriptor.value
+  }
+  return result
+}
+
+function defineSubagents(host: AdapterHost): new (ctx: any) => Service {
+  class SubagentsShim extends Service {
+    constructor(ctx: any) { super(ctx, 'subagents') }
+    getProvider(name: unknown) { return name === 'spawn' ? SPAWN_PROVIDER : undefined }
+    async startActivation(request: any) {
+      const owner = host.ownerOf(this.ctx)
+      const input = plain(request, ['provider', 'label', 'childId', 'request', 'signal', 'delivery'], 'activation')
+      if (input.provider !== 'spawn') throw new RpcError(ErrorCode.NotAvailable, 'only the spawn provider is available')
+      const spawn = plain(input.request, ['parent', 'prompt', 'agentOptions'], 'spawn request')
+      const options = spawn.agentOptions === undefined ? {} : plain(spawn.agentOptions, ['model'], 'agentOptions')
+      if (options.model !== undefined && typeof options.model !== 'string') throw new RpcError(ErrorCode.InvalidParams, 'agentOptions.model must be a string')
+      const delivery = input.delivery === undefined ? 'parent' : input.delivery
+      if (delivery !== 'caller' && delivery !== 'parent') throw new RpcError(ErrorCode.InvalidParams, 'delivery must be caller or parent')
+      const childId = input.childId
+      if (typeof childId !== 'string' || !/^[A-Za-z0-9_.:-]{1,128}$/.test(childId)) throw new RpcError(ErrorCode.InvalidParams, 'childId must be 1-128 letters, digits, or _.:-')
+      if (!Array.isArray(spawn.prompt) || spawn.prompt.length === 0) throw new RpcError(ErrorCode.InvalidParams, 'prompt must be a non-empty content array')
+      const prompt = spawn.prompt.map((block: unknown) => {
+        const item = plain(block, ['type', 'text'], 'prompt block')
+        if (item.type !== 'text' || typeof item.text !== 'string') throw new RpcError(ErrorCode.NotAvailable, 'only text prompt blocks are supported')
+        return item.text
+      }).join('')
+      if (input.signal !== undefined && !(input.signal instanceof AbortSignal)) throw new RpcError(ErrorCode.InvalidParams, 'signal must be an AbortSignal')
+      const invocation = host.liveInvocation(this.ctx)
+      if (!invocation || invocation.agent === undefined || spawn.parent !== invocation.agent) {
+        throw new RpcError(ErrorCode.NotAvailable, 'startActivation requires the exact live calling agent as parent')
+      }
+      if (invocation.owner !== owner) throw new RpcError(ErrorCode.NotAvailable, 'subagents service owner is no longer current')
+      if (invocation.delegated || invocation.subagentTicket === undefined) throw new RpcError(ErrorCode.NotAvailable, 'child agents are only available to a root tool invocation')
+      const signal = input.signal === undefined ? invocation.signal : AbortSignal.any([invocation.signal, input.signal as AbortSignal])
+      signal.throwIfAborted()
+      let persona: string | undefined
+      const denied = new Set<string>()
+      let open = true
+      const sealed = () => { if (!open) throw new RpcError(ErrorCode.NotAvailable, 'the child creation window has closed') }
+      const child = Object.freeze({
+        id: childId,
+        ctx: Object.freeze({
+          systemPrompt: Object.freeze({
+            getSectionOrder(name: unknown) {
+              sealed()
+              if (name !== 'DEPLOYMENT_PERSONA_PREFIX') throw new RpcError(ErrorCode.NotAvailable, 'only the deployment persona slot is available')
+              return PERSONA_ORDER
+            },
+            section(section: unknown) {
+              sealed()
+              const value = plain(section, ['name', 'order', 'text'], 'system prompt section')
+              if (value.name !== PERSONA_PREFIX_SECTION || value.order !== PERSONA_ORDER || typeof value.text !== 'string') {
+                throw new RpcError(ErrorCode.NotAvailable, 'only the child deployment persona section is supported')
+              }
+              if (persona !== undefined) throw new RpcError(ErrorCode.InvalidParams, 'the child persona is already set')
+              if (Buffer.byteLength(value.text) > 32 * 1024) throw new RpcError(ErrorCode.InvalidParams, 'child persona exceeds 32768 bytes')
+              persona = value.text
+              return () => undefined
+            },
+          }),
+          tools: Object.freeze({
+            restrict(filter: unknown) {
+              sealed()
+              const value = plain(filter, ['deny'], 'tool filter')
+              if (!Array.isArray(value.deny) || value.deny.some(name => typeof name !== 'string' || name === '')) throw new RpcError(ErrorCode.InvalidParams, 'deny must be a list of tool names')
+              for (const name of value.deny as string[]) denied.add(name)
+              return () => undefined
+            },
+          }),
+        }),
+      })
+      const listeners = (((this.ctx as any).root?.events?._hooks?.['agent/created']) ?? [])
+        .filter((hook: any) => !hook.global && hook.ctx !== undefined && host.ownerOf(hook.ctx) === owner)
+        .map((hook: any) => hook.callback)
+      try {
+        await Promise.all(listeners.map(async (callback: Function) => callback({ agent: child })))
+      } finally {
+        open = false
+      }
+      signal.throwIfAborted()
+      const call = invocation
+      const rpc = (method: string, params: Record<string, unknown>, abort: AbortSignal) =>
+        host.rpc.request<any>(method, { owner: call.owner.ref, ticket: call.subagentTicket, child_id: childId, ...params }, abort)
+      const started = await rpc('subagent/start', {
+        prompt,
+        ...(options.model === undefined ? {} : { model: options.model }),
+        ...(persona === undefined ? {} : { persona }),
+        denied_tools: [...denied],
+        delivery,
+      }, signal)
+      if (started === null || typeof started !== 'object' || started.child_id !== childId || typeof started.message_id !== 'string') {
+        throw new RpcError(ErrorCode.Internal, 'invalid child activation receipt')
+      }
+      let result: Promise<unknown> | undefined
+      let disposed: Promise<void> | undefined
+      return Object.freeze({
+        childId,
+        messageId: started.message_id,
+        get result() {
+          result ??= rpc('subagent/result', {}, call.signal).then((value: any) => {
+            if (value === null || typeof value !== 'object' || typeof value.stop_reason !== 'string' || !Array.isArray(value.output)) {
+              throw new RpcError(ErrorCode.Internal, 'invalid child result receipt')
+            }
+            return Object.freeze({
+              stopReason: value.stop_reason,
+              output: Object.freeze(value.output.map((block: any) => Object.freeze({ type: 'text', text: String(block.text) }))),
+              ...(value.omitted_blocks > 0 ? { diagnostic: `${value.omitted_blocks} non-text output block(s) are not supported` } : {}),
+            })
+          })
+          return result
+        },
+        dispose() {
+          disposed ??= rpc('subagent/dispose', {}, call.signal).then(() => undefined)
+          return disposed
+        },
+      })
+    }
+  }
+  Object.freeze(SubagentsShim.prototype)
+  return SubagentsShim
+}
+
+function defineAgents(): new (ctx: any) => Service {
+  class AgentsShim extends Service {
+    constructor(ctx: any) { super(ctx, 'agents') }
+  }
+  Object.freeze(AgentsShim.prototype)
+  return AgentsShim
+}
+
+export const DSH_AGENT_ADAPTERS: readonly DshAdapter[] = Object.freeze([
+  { service: 'subagents', define: defineSubagents },
+  { service: 'agents', define: defineAgents },
+])
@@ -23,7 +23,8 @@
      "prompt",
      "avatars",
      "mcp",
-      "shellHooks"
+      "shellHooks",
+      "remote"
    ]
  },
  "refused_services": [
@@ -0,0 +1,92 @@
+import { Service } from '@deepseek-ai/cordis'
+import { ErrorCode } from '../protocol.ts'
+import { RpcError } from '../rpc.ts'
+import type { AdapterHost, DshAdapter } from './adapters.ts'
+
+export const CREDENTIAL_HANDLE_PREFIX = 'codewhale-credential:'
+
+interface BrokeredResponse {
+  status: number
+  url: string
+  redirected: boolean
+  headers: [string, string][]
+  body_base64: string
+}
+
+function credentialRef(ref: unknown): string {
+  if (typeof ref !== 'string' || ref.length === 0) throw new RpcError(ErrorCode.InvalidParams, 'a credential ref is a non-empty string')
+  return ref
+}
+
+function brokered(value: unknown): BrokeredResponse {
+  const response = value as Partial<BrokeredResponse> | null
+  if (response === null || typeof response !== 'object' || typeof response.status !== 'number' || typeof response.url !== 'string'
+    || typeof response.body_base64 !== 'string' || !Array.isArray(response.headers)) {
+    throw new RpcError(ErrorCode.Internal, 'invalid network broker response')
+  }
+  return response as BrokeredResponse
+}
+
+async function requestBody(body: unknown): Promise<string | undefined> {
+  if (body === undefined || body === null) return undefined
+  if (typeof body === 'string') return Buffer.from(body, 'utf8').toString('base64')
+  if (body instanceof ArrayBuffer) return Buffer.from(body).toString('base64')
+  if (ArrayBuffer.isView(body)) return Buffer.from(body.buffer, body.byteOffset, body.byteLength).toString('base64')
+  if (body instanceof URLSearchParams) return Buffer.from(body.toString(), 'utf8').toString('base64')
+  if (body instanceof Blob) return Buffer.from(await body.arrayBuffer()).toString('base64')
+  throw new RpcError(ErrorCode.InvalidParams, 'the network broker sends string, binary, URLSearchParams or Blob bodies')
+}
+
+export async function brokeredFetch(host: AdapterHost, ctx: unknown, input: string | URL | Request, init: RequestInit = {}): Promise<Response> {
+  const request = input instanceof Request ? input : undefined
+  const url = request?.url ?? String(input)
+  const headers = new Headers(request?.headers)
+  new Headers(init.headers).forEach((value, name) => headers.set(name, value))
+  const body = init.body !== undefined ? init.body : request !== undefined && request.body !== null ? await request.arrayBuffer() : undefined
+  const result = brokered(await host.broker(ctx, 'network', 'fetch', {
+    url,
+    method: init.method ?? request?.method ?? 'GET',
+    headers: [...headers.entries()],
+    body_base64: await requestBody(body),
+  }))
+  const bytes = Buffer.from(result.body_base64, 'base64')
+  const nullBody = [101, 204, 205, 304].includes(result.status)
+  const response = new Response(nullBody ? null : bytes, { status: result.status, headers: result.headers })
+  Object.defineProperty(response, 'url', { value: result.url })
+  Object.defineProperty(response, 'redirected', { value: result.redirected === true })
+  return response
+}
+
+export const credentialsAdapter: DshAdapter = {
+  service: 'credentials',
+  define(host) {
+    class CredentialsService extends Service {
+      constructor(ctx: any) { super(ctx, 'credentials') }
+
+      async resolve(ref: unknown): Promise<{ value: string } | undefined> {
+        const result = await host.broker(this.ctx, 'network', 'credentials.resolve', { ref: credentialRef(ref) }) as { value?: unknown } | null
+        const value = result?.value
+        if (value === null || value === undefined) return undefined
+        if (typeof value !== 'string' || !value.startsWith(CREDENTIAL_HANDLE_PREFIX)) throw new RpcError(ErrorCode.Internal, 'invalid credential handle')
+        return { value }
+      }
+
+      async describe(ref: unknown): Promise<{ ref: string, set: boolean }> {
+        const result = await host.broker(this.ctx, 'network', 'credentials.describe', { ref: credentialRef(ref) }) as { ref?: unknown, set?: unknown } | null
+        if (result === null || typeof result !== 'object' || typeof result.set !== 'boolean') throw new RpcError(ErrorCode.Internal, 'invalid credential description')
+        return { ref: credentialRef(ref), set: result.set }
+      }
+
+      async set(ref: unknown, value: unknown): Promise<void> {
+        if (typeof value !== 'string' || value.length === 0) throw new RpcError(ErrorCode.InvalidParams, 'a credential value is a non-empty string')
+        await host.broker(this.ctx, 'network', 'credentials.set', { ref: credentialRef(ref), value })
+      }
+
+      fetch(input: string | URL | Request, init?: RequestInit): Promise<Response> {
+        return brokeredFetch(host, this.ctx, input, init)
+      }
+    }
+    Object.freeze(CredentialsService.prototype)
+    return CredentialsService
+  },
+}
@@ -0,0 +1,33 @@
+import { Service } from '@deepseek-ai/cordis'
+import { ErrorCode } from '../protocol.ts'
+import { RpcError } from '../rpc.ts'
+import type { DshAdapter } from './adapters.ts'
+
+function label(value: unknown): string | undefined {
+  if (value === undefined) return undefined
+  if (typeof value !== 'string') throw new RpcError(ErrorCode.InvalidParams, 'remote.pair label must be a string')
+  return value
+}
+
+function grant(value: unknown): string {
+  if (typeof value !== 'string' || value.length === 0 || value.length > 128) throw new RpcError(ErrorCode.InvalidParams, 'remote.revoke needs the grant id remote.pair returned')
+  return value
+}
+
+export const remoteAdapter: DshAdapter = {
+  service: 'remote',
+  define(host) {
+    class RemoteService extends Service {
+      constructor(ctx: any) { super(ctx, 'remote') }
+      status() { return host.broker(this.ctx, 'remote', 'status', {}) }
+      pair(options?: { label?: unknown }) {
+        const value = label(options?.label)
+        return host.broker(this.ctx, 'remote', 'pair', value === undefined ? {} : { label: value })
+      }
+      clients() { return host.broker(this.ctx, 'remote', 'clients', {}) }
+      revoke(id: unknown) { return host.broker(this.ctx, 'remote', 'revoke', { grant: grant(id) }) }
+    }
+    Object.freeze(RemoteService.prototype)
+    return RemoteService
+  },
+}
@@ -0,0 +1,58 @@
+import { Service } from '@deepseek-ai/cordis'
+import { ErrorCode } from '../protocol.ts'
+import { RpcError } from '../rpc.ts'
+import type { OwnerRecord, ToolInvocation } from '../root.ts'
+import type { AdapterHost, DshAdapter } from './adapters.ts'
+
+const CHILD_ONLY = "system prompt sections are only available on a child agent's agent/created context"
+
+function checkpointCall(host: AdapterHost, ctx: unknown, session: unknown): ToolInvocation | undefined {
+  const invocation = host.liveInvocation(ctx)
+  const ticket = invocation?.ticket
+  return invocation !== undefined && typeof ticket === 'string' && ticket.length > 0
+    && session !== undefined && session === invocation.session
+    ? invocation
+    : undefined
+}
+
+export const sessionsAdapter: DshAdapter = {
+  service: 'sessions',
+  define(host) {
+    class SessionsService extends Service {
+      constructor(ctx: any) { super(ctx, 'sessions') }
+
+      async flush(session: unknown): Promise<boolean> {
+        const ctx = this.ctx
+        const call = checkpointCall(host, ctx, session)
+        if (call === undefined) throw new RpcError(ErrorCode.NotAvailable, 'sessions.flush requires this live tool invocation’s session')
+        const owner: OwnerRecord = call.owner
+        const live = () => checkpointCall(host, ctx, session) === call && !call.signal.aborted
+        const run = async () => {
+          if (!live()) throw new RpcError(ErrorCode.NotAvailable, 'session checkpoint invocation ended')
+          const result = await host.rpc.request<unknown>('session/checkpoint', { owner: owner.ref, ticket: call.ticket }, call.signal)
+          if (!live()) throw new RpcError(ErrorCode.NotAvailable, 'session checkpoint invocation ended')
+          if (typeof result !== 'boolean') throw new RpcError(ErrorCode.Internal, 'invalid session checkpoint receipt')
+          return result
+        }
+        const result = call.pending.then(run)
+        call.pending = result.then(() => undefined, () => undefined)
+        return result
+      }
+    }
+    Object.freeze(SessionsService.prototype)
+    return SessionsService
+  },
+}
+
+export const systemPromptAdapter: DshAdapter = {
+  service: 'systemPrompt',
+  define() {
+    class SystemPromptService extends Service {
+      constructor(ctx: any) { super(ctx, 'systemPrompt') }
+      section() { throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY) }
+      getSectionOrder() { throw new RpcError(ErrorCode.NotAvailable, CHILD_ONLY) }
+    }
+    Object.freeze(SystemPromptService.prototype)
+    return SystemPromptService
+  },
+}
@@ -0,0 +1,64 @@
+import { Service } from '@deepseek-ai/cordis'
+import { ErrorCode } from '../protocol.ts'
+import { RpcError } from '../rpc.ts'
+import type { DshAdapter } from './adapters.ts'
+
+const SESSION = /^[A-Za-z0-9._-]{1,64}$/
+
+function invalid(message: string): never {
+  throw new RpcError(ErrorCode.InvalidParams, message)
+}
+
+function session(value: unknown): string {
+  if (typeof value !== 'string' || !SESSION.test(value)) invalid('a terminal name is 1 to 64 letters, digits, `_`, `-` or `.`')
+  return value as string
+}
+
+function text(value: unknown, what: string): string {
+  if (typeof value !== 'string' || value.length === 0) invalid(`${what} is a non-empty string`)
+  return value as string
+}
+
+function bounded(value: unknown, what: string, min: number, max: number): number | undefined {
+  if (value === undefined) return undefined
+  if (typeof value !== 'number' || !Number.isInteger(value) || value < min || value > max) invalid(`${what} is an integer between ${min} and ${max}`)
+  return value as number
+}
+
+function compact(input: Record<string, unknown>): Record<string, unknown> {
+  return Object.fromEntries(Object.entries(input).filter(([, value]) => value !== undefined))
+}
+
+export const terminalAdapter: DshAdapter = {
+  service: 'terminal',
+  define(host) {
+    class TerminalService extends Service {
+      constructor(ctx: any) { super(ctx, 'terminal') }
+      list() { return host.broker(this.ctx, 'terminal', 'list', {}) }
+      run(command: unknown, options?: { session?: unknown, timeoutSecs?: unknown }) {
+        return host.broker(this.ctx, 'terminal', 'run', compact({
+          command: text(command, 'a command'),
+          session: options?.session === undefined ? undefined : session(options.session),
+          timeout_secs: bounded(options?.timeoutSecs, 'timeoutSecs', 1, 600),
+        }))
+      }
+      send(name: unknown, input: unknown, options?: { waitMs?: unknown }) {
+        return host.broker(this.ctx, 'terminal', 'send', compact({
+          session: session(name),
+          text: text(input, 'terminal input'),
+          wait_ms: bounded(options?.waitMs, 'waitMs', 0, 60_000),
+        }))
+      }
+      wait(name: unknown, options?: { timeoutSecs?: unknown }) {
+        return host.broker(this.ctx, 'terminal', 'wait', compact({
+          session: session(name),
+          timeout_secs: bounded(options?.timeoutSecs, 'timeoutSecs', 1, 600),
+        }))
+      }
+      cancel(name: unknown) { return host.broker(this.ctx, 'terminal', 'cancel', { session: session(name) }) }
+      reset(name: unknown) { return host.broker(this.ctx, 'terminal', 'reset', { session: session(name) }) }
+    }
+    Object.freeze(TerminalService.prototype)
+    return TerminalService
+  },
+}
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 DeepSeek
+
+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.
@@ -0,0 +1,17 @@
+# DeepSeek Harness creator files, pinned
+
+Byte-for-byte copies of the files DeepSeek Harness 0.2.2-rc.1 uses for its
+Creator mode, kept so Codewhale hosts the same tool and skill text rather than
+a rewrite. `UPSTREAM.json` records the package, version, upstream path and
+SHA-256 of every file; `test/creator-pin.test.mjs` fails when a file drifts.
+
+- `plugin-manager/tools.js`: `@deepseek-ai/dsh-plugin-manager` `lib/types/tools.js`
+- `tool-cordis/index.js`: `@deepseek-ai/dsh-tool-cordis` `lib/index.js`
+- `sandbox/escalation.js`: not yet pinned (see `UPSTREAM.json`, `pending`)
+
+The four authoring skills of `@deepseek-ai/dsh-agent-preset` are pinned beside
+the skills crate at `crates/skills/assets/dsh-creator/`.
+
+The files are MIT licensed by DeepSeek; `LICENSE` is the licence text shipped
+in each of the four packages. Nothing here is edited: change the pin by
+replacing the file and its recorded hash together, at a new DSH version.
@@ -0,0 +1,39 @@
+{
+  "repository": "https://github.com/deepseek-ai/deepseek-harness",
+  "version": "0.2.2-rc.1",
+  "license": "MIT",
+  "license_sha256": "ebb4f09972aee8608be255debaf78451a68e95c290f55c240dec2ecfa16ea6be",
+  "source": "npm packages as shipped in DeepSeek Harness desktop 0.2.2-rc.1",
+  "packages": [
+    "@deepseek-ai/dsh-agent-preset",
+    "@deepseek-ai/dsh-plugin-manager",
+    "@deepseek-ai/dsh-tool-cordis",
+    "@deepseek-ai/dsh-sandbox"
+  ],
+  "files": [
+    {
+      "path": "plugin-manager/tools.js",
+      "package": "@deepseek-ai/dsh-plugin-manager",
+      "upstream_path": "lib/types/tools.js",
+      "sha256": "18d9f06f20a821bd205b6d88f87f440659730ef9431fb92351a50d86779da3ca",
+      "bytes": 12583,
+      "verbatim": true
+    },
+    {
+      "path": "tool-cordis/index.js",
+      "package": "@deepseek-ai/dsh-tool-cordis",
+      "upstream_path": "lib/index.js",
+      "sha256": "ce0cd4d8983532c920cab7713dc51874f6d710c2c46c4a095167bfa980becdb0",
+      "bytes": 3687,
+      "verbatim": true
+    }
+  ],
+  "pending": [
+    {
+      "path": "sandbox/escalation.js",
+      "package": "@deepseek-ai/dsh-sandbox",
+      "reason": "excerpt of approveEscalation and its mode table; needs the published tarball, not yet fetched"
+    }
+  ],
+  "skills_pin": "crates/skills/assets/dsh-creator/UPSTREAM.json"
+}
@@ -0,0 +1,154 @@
+/** Agent-facing current-profile management using the same service as Web controls. */
+import { assertNever } from '@deepseek-ai/dsh-util-values';
+import { approveEscalation } from '@deepseek-ai/dsh-sandbox';
+import { defineTool } from '@deepseek-ai/dsh-tools';
+import { getDshRuntimeVersion } from '@deepseek-ai/dsh-app-boot';
+/** What the model does next for each refusal the manager reports. */
+const ERROR_STEPS = {
+    'management-required': 'This entry belongs to plugin management itself and cannot be changed.',
+    'unaddressable': 'This entry has no unique profile patch target; tell the user to edit the profile patch file directly.',
+    'unknown-plugin': 'Call list_plugins and retry with an exact entryId.',
+    'invalid-spec': 'Retry with an npm package name, a git URL, a tarball URL, or an absolute local directory.',
+    'already-installed': 'The package is already installed; to install another version, call remove_bundle first, then install_bundle again.',
+    'ambiguous-install': 'The dependency change named no single package; call list_bundles to see what was installed.',
+    'not-bundle': 'The package declares no dsh.bundle and cannot be managed as a plugin; install a DSH plugin bundle instead.',
+    'not-removable': 'Call list_bundles; only bundles marked removable can be removed.',
+    'stop-profile': 'This profile runs without HMR; tell the user to stop DSH and run `dsh plugin --profile <profile> remove <bundle>`.',
+    'bundle-in-use': 'Call list_plugins, disable the entries from other layers that still use this bundle, then retry.',
+    'stale-approval': 'Call install_bundle again without approvedBuilds to read the current pendingBuilds.',
+    'incompatible-version': 'Install a version compatible with the running DSH. A version exemption needs the user\'s explicit acceptance of crash and data-loss risk.',
+    'unsupported-platform': 'This bundle cannot run on the current Host platform; ask the user to use a supported Host.',
+    'operation-error': 'Report the diagnostic to the user; retry only after its cause is addressed.',
+};
+/** What the model does next for each package-manager failure. */
+const FAILURE_STEPS = {
+    'pnpm-missing': 'pnpm is not available to DSH; tell the user to install pnpm.',
+    'timeout': 'Retry, or retry with another registry.',
+    'not-found': 'Check the package name and version with the user, then retry.',
+    'no-matching-version': 'Retry with a published version.',
+    'network': 'Retry later or pass another registry.',
+    'disk-full': 'Tell the user to free disk space, then retry.',
+    'permission': 'Tell the user DSH cannot write the profile directory; retry after they fix its permissions.',
+    'build-blocked': 'Ask the user whether to allow the install scripts of the packages in pendingBuilds; if they approve, retry with approvedBuilds.',
+};
+/** Why a change waits for a restart, as the model tells the user. */
+const RESTART_STEPS = {
+    'no-hmr': 'this profile applies changes only at startup',
+    'package-moved': 'an installed package now resolves to another directory, or the change replaces a package the DSH installation provides; remove a package before installing it from another location',
+    'host-module': 'the change reaches modules DSH itself loaded',
+    'unmanaged-plugin': 'the change reaches a plugin running outside the plugin list',
+    'module-comparison': 'DSH could not compare loaded plugins with their files',
+};
+/**
+ * The model-facing result of a change: the manager's result plus the next step its outcome calls for.
+ * @param result The manager's result.
+ * @returns The result with `nextStep` when it is not plainly applied.
+ */
+function withNextStep(result) {
+    switch (result.application) {
+        case 'applied':
+            return result;
+        case 'cancelled':
+            return { ...result, nextStep: 'The installation was cancelled and its files restored; nothing changed.' };
+        case 'overridden':
+            return { ...result, nextStep: 'Saved, but a higher-priority layer such as the agent preset overrides it; tell the user it is not in effect.' };
+        case 'restart-required': {
+            const reason = result.restartReason === undefined ? '' : `: ${RESTART_STEPS[result.restartReason]}`;
+            return { ...result, nextStep: `Tell the user to restart DSH to apply this change${reason}.` };
+        }
+        case 'failed': {
+            const code = result.error?.code ?? 'operation-error';
+            // A refusal code is more specific than the package manager's failure kind.
+            const kind = code === 'operation-error' ? result.packageResult?.kind : undefined;
+            return { ...result, nextStep: (kind === undefined ? undefined : FAILURE_STEPS[kind]) ?? ERROR_STEPS[code] };
+        }
+        /* v8 ignore next -- ChangeResult.application is a closed union */
+        default: return assertNever(result.application);
+    }
+}
+/** Required services for the management tool. */
+export const inject = ['tools', 'pluginManager', 'sandboxPolicy'];
+/** Register one management tool for discovery and the four persistent actions.
+ * @param ctx Agent-scoped tool registration context.
+ */
+export function apply(ctx) {
+    ctx.tools.register(defineTool({
+        name: 'plugin_manager',
+        description: 'List plugins or bundles in the current profile, enable or disable them, install a bundle, or remove an installed bundle. Every action requires danger-full-access permission or approval for this call. Approval does not change the session permission mode. Changes affect every session in this profile. List first to obtain exact identifiers. Package installation can execute allowed build scripts. Live profiles apply changes immediately, including upgrades of installed packages; a change result that is not applied carries nextStep, which says what to do or tell the user. Unmet DSH version requirements (engines.dsh, else DSH peer dependencies) block installation and activation. Version exemptions risk crashes and data loss: warn the user and obtain explicit permission for the exact plugin and runtime versions before granting one.',
+        parameters: {
+            action: { type: 'string', required: true, enum: ['list_plugins', 'list_bundles', 'set_plugin', 'set_bundle', 'install_bundle', 'remove_bundle', 'list_version_exemptions', 'set_version_exemption'], description: 'Management operation.' },
+            target: { type: 'string', description: 'Plugin entry id, bundle package name, or installation spec, according to action. For an Official catalog entry, pass list_bundles installTarget.spec to install_bundle.' },
+            enabled: { type: 'boolean', description: 'Required for set operations; defaults to true for installation. For set_version_exemption, true grants and false revokes.' },
+            runtimeVersion: { type: 'string', description: 'For set_version_exemption: exact DSH version from list_version_exemptions. Target must be the manifest package-name@version, not an alias or version range.' },
+            acceptRisk: { type: 'boolean', description: 'For granting an exemption: true only after warning the user about possible crashes and data loss and receiving explicit permission for this exact plugin/runtime pair. General installation permission is not enough.' },
+            approvedBuilds: { type: 'array', items: { type: 'string' }, description: 'For install_bundle: pass names from pendingBuilds only after the user explicitly approves running their install scripts in the conversation. This grants persistent permission for this profile.' },
+            registry: { type: 'string', description: 'For install_bundle: the npm registry URL asked first, when the user names one; otherwise the configured registry is asked, and its configured fallbacks while a registry is unreachable.' },
+            offset: { type: 'number', description: 'Zero-based list offset; defaults to 0.' },
+            limit: { type: 'number', description: 'List page size, from 1 to 100; defaults to 25.' },
+        },
+        output: {
+            schema: { type: 'string' },
+            render: (_args, value) => [{ type: 'text', text: value }],
+        },
+        async execute(args, exec) {
+            const policy = ctx.sandboxPolicy.resolve(exec.agent === undefined ? {} : { session: exec.agent.session });
+            await approveEscalation({
+                requestedMode: 'danger-full-access', effectiveMode: policy.mode, subject: 'plugin management operation',
+                justification: `plugin_manager ${JSON.stringify(args)}. Profile changes persist across sessions; installed Host code runs outside the workspace sandbox.`,
+            }, { approver: ctx.get('approval'), agent: exec.agent, callId: exec.callId,
+                toolName: 'plugin_manager', signal: exec.signal });
+            exec.signal.throwIfAborted();
+            const manager = ctx.pluginManager;
+            switch (args.action) {
+                case 'list_version_exemptions':
+                    return JSON.stringify({ runtimeVersion: getDshRuntimeVersion(), ...manager.listVersionExemptions() });
+                case 'set_version_exemption':
+                    if (args.target === undefined || args.runtimeVersion === undefined || args.enabled === undefined) {
+                        throw new Error('target package-name@version, runtimeVersion, and enabled are required');
+                    }
+                    return JSON.stringify(withNextStep(await manager.setVersionExemption(args.target, args.runtimeVersion, args.enabled, args.acceptRisk)));
+                case 'list_plugins':
+                case 'list_bundles': {
+                    const offset = args.offset ?? 0;
+                    const limit = args.limit ?? 25;
+                    if (!Number.isInteger(offset) || offset < 0 || !Number.isInteger(limit) || limit < 1 || limit > 100) {
+                        throw new Error('offset must be a non-negative integer and limit must be an integer from 1 to 100');
+                    }
+                    const rows = args.action === 'list_plugins' ? await manager.listPlugins() : await manager.listBundles();
+                    const entries = rows.slice(offset, offset + limit).map(({ meta: _meta, ...row }) => 'rows' in row
+                        // GUI listing and update eligibility do not change the tool's management operations.
+                        ? (({ updatable: _updatable, listedByDefault: _listedByDefault, ...bundle }) => ({
+                            ...bundle, rows: bundle.rows.map(({ meta: _rowMeta, ...declared }) => declared),
+                        }))(row)
+                        : row);
+                    return JSON.stringify({ entries, total: rows.length,
+                        nextOffset: offset + entries.length < rows.length ? offset + entries.length : null });
+                }
+                case 'set_plugin':
+                case 'set_bundle': {
+                    if (args.target === undefined || args.enabled === undefined)
+                        throw new Error('target and enabled are required');
+                    return JSON.stringify(withNextStep(await (args.action === 'set_plugin'
+                        ? manager.setPluginEnabled(args.target, args.enabled)
+                        : manager.setBundleEnabled(args.target, args.enabled))));
+                }
+                case 'install_bundle':
+                    if (args.target === undefined)
+                        throw new Error('target package spec is required');
+                    return JSON.stringify(withNextStep(await manager.installBundle(args.target, {
+                        ...args.enabled === undefined ? {} : { enabled: args.enabled },
+                        ...args.approvedBuilds === undefined ? {} : { approvedBuilds: args.approvedBuilds },
+                        ...args.registry === undefined ? {} : { registry: args.registry },
+                    })));
+                case 'remove_bundle':
+                    if (args.target === undefined)
+                        throw new Error('target bundle name is required');
+                    return JSON.stringify(withNextStep(await manager.removeBundle(args.target)));
+                /* v8 ignore next -- tool JSON validation rejects actions outside the declared enum */
+                default: return assertNever(args.action);
+            }
+        },
+        presentCall: args => ({ card: 'generic', title: 'Manage profile plugins', kind: args.action.startsWith('list_') ? 'read' : 'other', rawInput: args }),
+    }));
+}
+//# sourceMappingURL=tools.js.map
@@ -0,0 +1,100 @@
+import { defineTool } from "@deepseek-ai/dsh-tools";
+//#region lib/types/present.js
+/**
+* Render provider-directory inspection.
+* @returns replay-safe generic call presentation.
+*/
+function presentInspectListCall() {
+	return {
+		card: "generic",
+		kind: "read",
+		title: "List Cordis Inspect Providers"
+	};
+}
+/**
+* Render one provider query.
+* @param args - target platform, provider, and method.
+* @returns replay-safe generic call presentation.
+*/
+function presentInspectQueryCall(args) {
+	return {
+		card: "generic",
+		kind: "read",
+		title: `Query Cordis ${args.platform} ${args.provider}.${args.method}`
+	};
+}
+//#endregion
+//#region lib/types/index.js
+const name = "tool-cordis";
+const inject = ["tools", "cordisInspect"];
+function requireAgent(exec) {
+	if (exec.agent === void 0) throw new Error("Cordis inspection requires an Agent-backed session");
+	return exec.agent;
+}
+/** Register read-only runtime inspection tools over the Host providers that
+* `@deepseek-ai/dsh-tool-cordis/host` registers once per process.
+* @param ctx Agent-scoped registration context.
+*/
+function apply(ctx) {
+	ctx.tools.register(defineTool({
+		name: "cordis_inspect_list",
+		description: "List every Cordis Inspect Provider currently known to the Host, including local Host Providers and the latest manifests synchronized from the Client. Each entry includes its platform, purpose, read-only methods, and input/output schemas. Call this Tool before writing or configuring a plugin, then select the provider and method for cordis_inspect_query from its result. Do not guess names or treat an Inspect method as a business Service that Plugin code can call.",
+		parameters: {},
+		output: {
+			schema: { type: "json" },
+			render: (_args, value) => [{
+				type: "text",
+				text: JSON.stringify(value, null, 2)
+			}]
+		},
+		execute(_args, _exec) {
+			return Promise.resolve({ providers: ctx.cordisInspect.list() });
+		},
+		presentCall: presentInspectListCall
+	}));
+	ctx.tools.register(defineTool({
+		name: "cordis_inspect_query",
+		description: "Run a read-only query declared by an Inspect Provider. platform, provider, and method must come from cordis_inspect_list, and input must satisfy that method's schema. Use this Tool before writing plugin code to read exact Service methods, Event modes, plugin Config schemas, Tool schemas, theme tokens, or live Slot trees and props. Host queries run locally. A Client query waits for the first valid page response within the configured timeout; otherwise it reports a Client failure or asks you to reconnect and retry. This Tool cannot invoke business Service methods or modify the runtime.",
+		parameters: {
+			platform: {
+				type: "string",
+				required: true,
+				enum: ["host", "client"],
+				description: "Runtime platform that owns the Provider."
+			},
+			provider: {
+				type: "string",
+				required: true,
+				description: "Exact Provider ID returned by cordis_inspect_list."
+			},
+			method: {
+				type: "string",
+				required: true,
+				description: "Exact method name declared by the Provider manifest."
+			},
+			input: {
+				type: "json",
+				description: "Optional query input; it must satisfy the method input schema."
+			}
+		},
+		output: {
+			schema: { type: "json" },
+			render: (_args, value) => [{
+				type: "text",
+				text: JSON.stringify(value, null, 2)
+			}]
+		},
+		async execute(args, exec) {
+			const data = await ctx.cordisInspect.query(args.platform, args.provider, args.method, args.input, requireAgent(exec), exec.signal);
+			return {
+				platform: args.platform,
+				provider: args.provider,
+				method: args.method,
+				data
+			};
+		},
+		presentCall: presentInspectQueryCall
+	}));
+}
+//#endregion
+export { apply, inject, name };
@@ -0,0 +1,70 @@
+import { Service } from '@deepseek-ai/cordis'
+import { ErrorCode } from '../protocol.ts'
+import { RpcError } from '../rpc.ts'
+import type { DshAdapter } from './adapters.ts'
+
+const MAX_PATH = 512
+const MAX_WRITE = 1024 * 1024
+const MAX_ARGV = 9
+const MAX_ARG = 1024
+
+function invalid(message: string): never {
+  throw new RpcError(ErrorCode.InvalidParams, message)
+}
+
+function path(value: unknown): string {
+  if (typeof value !== 'string' || value.length === 0 || value.length > MAX_PATH || value.trim() !== value || /[\x00-\x1f\x7f]/.test(value)) {
+    invalid(`a path is 1 to ${MAX_PATH} characters on one line with no surrounding spaces`)
+  }
+  return value as string
+}
+
+function bounded(value: unknown, what: string, min: number, max: number): number | undefined {
+  if (value === undefined) return undefined
+  if (typeof value !== 'number' || !Number.isInteger(value) || value < min || value > max) invalid(`${what} is an integer between ${min} and ${max}`)
+  return value as number
+}
+
+function argv(value: unknown): string[] {
+  if (!Array.isArray(value) || value.length === 0 || value.length > MAX_ARGV || value.some(arg => typeof arg !== 'string' || arg.length > MAX_ARG || /[\x00-\x1f\x7f]/.test(arg))) {
+    invalid(`argv is 1 to ${MAX_ARGV} strings of at most ${MAX_ARG} characters`)
+  }
+  return [...value as string[]]
+}
+
+function compact(input: Record<string, unknown>): Record<string, unknown> {
+  return Object.fromEntries(Object.entries(input).filter(([, value]) => value !== undefined))
+}
+
+export const workspaceAdapter: DshAdapter = {
+  service: 'workspace',
+  define(host) {
+    class WorkspaceService extends Service {
+      constructor(ctx: any) { super(ctx, 'workspace') }
+      read(file: unknown, options?: { startLine?: unknown, maxLines?: unknown }) {
+        return host.broker(this.ctx, 'workspace', 'read', compact({
+          path: path(file),
+          start_line: bounded(options?.startLine, 'startLine', 1, Number.MAX_SAFE_INTEGER),
+          max_lines: bounded(options?.maxLines, 'maxLines', 1, 10_000),
+        }))
+      }
+      list(dir?: unknown) {
+        return host.broker(this.ctx, 'workspace', 'list', compact({ path: dir === undefined ? undefined : path(dir) }))
+      }
+      write(file: unknown, content: unknown, options?: { expectedHash?: unknown }) {
+        if (typeof content !== 'string' || Buffer.byteLength(content) > MAX_WRITE) invalid(`content is a string of at most ${MAX_WRITE} bytes`)
+        const hash = options?.expectedHash
+        if (hash !== undefined && (typeof hash !== 'string' || hash.length === 0 || hash.length > 128)) invalid('expectedHash is 1 to 128 characters')
+        return host.broker(this.ctx, 'workspace', 'write', compact({ path: path(file), content, expected_hash: hash }))
+      }
+      exec(command: unknown, options?: { cwd?: unknown }) {
+        return host.broker(this.ctx, 'workspace', 'exec', compact({
+          argv: argv(command),
+          cwd: options?.cwd === undefined ? undefined : path(options.cwd),
+        }))
+      }
+    }
+    Object.freeze(WorkspaceService.prototype)
+    return WorkspaceService
+  },
+}
@@ -25,6 +25,9 @@ export const ErrorCode = {

 export type Direction = 'core_to_host' | 'host_to_core'

+export const DSH_SERVICES = ['workspace', 'llm', 'network', 'settings', 'catalog', 'terminal', 'remote'] as const
+export type DshService = typeof DSH_SERVICES[number]
+
 /** Every method either side may send, and the trust tiers it is allowed on; nothing else is admitted. */
 export const METHODS = [
  { name: 'host/initialize', direction: 'core_to_host', request: true, params: 'InitializeParams', tiers: ['plugin', 'builtin'] },
@@ -50,6 +53,7 @@ export const METHODS = [
  { name: 'subagent/start', direction: 'host_to_core', request: true, params: 'SubagentStartParams', tiers: ['plugin', 'builtin'] },
  { name: 'subagent/result', direction: 'host_to_core', request: true, params: 'SubagentHandleParams', tiers: ['plugin', 'builtin'] },
  { name: 'subagent/dispose', direction: 'host_to_core', request: true, params: 'SubagentHandleParams', tiers: ['plugin', 'builtin'] },
+  { name: 'dsh/broker', direction: 'host_to_core', request: true, params: 'DshBrokerParams', tiers: ['plugin', 'builtin'] },
  { name: 'proc/launch', direction: 'host_to_core', request: true, params: 'ProcLaunchParams', tiers: ['builtin'] },
  { name: 'proc/read', direction: 'host_to_core', request: true, params: 'ProcSessionParams', tiers: ['builtin'] },
  { name: 'proc/write', direction: 'host_to_core', request: true, params: 'ProcWriteParams', tiers: ['builtin'] },
@@ -111,6 +115,16 @@ export const SHAPES: { readonly [name: string]: Shape } = {
    required: { owner: { ref: 'OwnerRef' } },
    optional: { entry: { ref: 'EntryRef' } },
  },
+  DshBrokerParams: {
+    strict: true,
+    required: { owner: { ref: 'OwnerRef' }, ticket: 'string', service: 'string', method: 'string', input: 'json' },
+    optional: {},
+  },
+  DshBrokerTicketWire: {
+    strict: true,
+    required: { service: 'string', ticket: 'string' },
+    optional: {},
+  },
  EmptyParams: {
    strict: true,
    required: {},
@@ -274,7 +288,7 @@ export const SHAPES: { readonly [name: string]: Shape } = {
  ToolCallParams: {
    strict: false,
    required: { handle: 'uint', call_id: 'string', input: 'json', deadline_ms: 'uint' },
-    optional: { workspace: 'string', ticket: 'string', checkpoint_ticket: 'string', question_ticket: 'string', subagent_ticket: 'string', caller_tools: { items: 'string' }, session_id: 'string', agent_id: 'string', origin_turn_id: 'string' },
+    optional: { workspace: 'string', ticket: 'string', checkpoint_ticket: 'string', question_ticket: 'string', subagent_ticket: 'string', broker_tickets: { items: { ref: 'DshBrokerTicketWire' } }, caller_tools: { items: 'string' }, session_id: 'string', agent_id: 'string', origin_turn_id: 'string' },
  },
  UnregisterParams: {
    strict: true,
@@ -355,6 +369,19 @@ export interface DeactivateResult {
  leaked: string[]
 }

+export interface DshBrokerParams {
+  owner: OwnerRef
+  ticket: string
+  service: string
+  method: string
+  input: Json
+}
+
+export interface DshBrokerTicketWire {
+  service: string
+  ticket: string
+}
+
 export interface EmptyParams {}

 export interface EntryRef {
@@ -592,6 +619,7 @@ export interface ToolCallParams {
  checkpoint_ticket?: string
  question_ticket?: string
  subagent_ticket?: string
+  broker_tickets?: DshBrokerTicketWire[]
  caller_tools?: string[]
  session_id?: string
  agent_id?: string
@@ -1,4 +1,5 @@
 import { ReviewedLoader, installCompositionLoader } from './dsh/composition.ts'
+import { DSH_ADAPTERS, type AdapterHost, type DshAdapter } from './dsh/adapters.ts'
 /**
 * The Cordis root that plugin fibers run under.
 *
@@ -31,7 +32,7 @@ import {
  type ToolResultWire,
 } from './protocol.ts'
 import { RpcError, type RpcPeer } from './rpc.ts'
-import { UserQuestionError, PERSONA_PREFIX_SECTION } from './dsh/dsh-message-compat.js'
+import { UserQuestionError } from './dsh/dsh-message-compat.js'
 import { explainImportError } from './dsh/resolve-hooks.ts'
 import compatibility from './dsh/compatibility.json' with { type: 'json' }
 import { assertSupportedJsonSchema, validateJsonSchemaValue, ToolOutputError } from './dsh/dsh-tools-compat.js'
@@ -68,6 +69,7 @@ export const REFUSED_SERVICES = new Set(compatibility.refused_services)

 /** Services the root provides; `inject` of anything else fails activation. */
 const PROVIDED_SERVICES = new Set(Object.values(compatibility.provided_services).flat())
+const CORDIS_SERVICES = new Set(compatibility.provided_services.cordis)

 const ACTIVATE_DEADLINE_MS = 5_000
 const DISPOSE_DEADLINE_MS = 2_000
@@ -134,12 +136,13 @@ function withDeadline<T>(promise: Promise<T>, ms: number, label: string): Promis
  return Promise.race([promise, deadline]).finally(() => clearTimeout(timer))
 }

-interface ToolInvocation {
+export interface ToolInvocation {
  owner: OwnerRecord
  session: object | undefined
  agent: object | undefined
  questionTicket: string | undefined
  subagentTicket: string | undefined
+  brokerTickets: ReadonlyMap<string, string>
  callerTools: readonly string[]
  delegated: boolean
  ticket: string | undefined
@@ -165,6 +168,7 @@ export class HostRoot {
    private readonly rpc: RpcPeer,
    /** The trust tier this process serves; it activates only owners of that tier. */
    readonly tier: HostTier,
+    adapters: readonly DshAdapter[] = DSH_ADAPTERS,
  ) {
    const root: any = new Context()
    this.root = root
@@ -299,28 +303,6 @@ export class HostRoot {
      set(key: string, value: Json) { return this.api().set(key, value) }
      delete(key: string) { return this.api().delete(key) }
    }
-    class SessionsShim extends Service {
-      constructor(ctx: any) { super(ctx, 'sessions') }
-      async flush(session: unknown): Promise<boolean> {
-        const invocation = host.toolInvocations.getStore()
-        const owner: OwnerRecord | undefined = (this.ctx as any)[OWNER]
-        const live = () => invocation && invocation.active && !invocation.signal.aborted
-          && invocation.owner === owner && owner?.state === 'active' && !owner.disposing
-          && invocation.ticket !== undefined && session === invocation.session && session !== undefined
-        if (!live()) throw new RpcError(ErrorCode.NotAvailable, 'sessions.flush requires this live tool invocation’s session')
-        const call = invocation!
-        const run = async () => {
-          if (!live()) throw new RpcError(ErrorCode.NotAvailable, 'session checkpoint invocation ended')
-          const result = await host.rpc.request<unknown>('session/checkpoint', { owner: call.owner.ref, ticket: call.ticket }, call.signal)
-          if (!live()) throw new RpcError(ErrorCode.NotAvailable, 'session checkpoint invocation ended')
-          if (typeof result !== 'boolean') throw new RpcError(ErrorCode.Internal, 'invalid session checkpoint receipt')
-          return result
-        }
-        const result = call.pending.then(run)
-        call.pending = result.then(() => undefined, () => undefined)
-        return result
-      }
-    }
    class UserQuestionsShim extends Service {
      constructor(ctx: any) { super(ctx, 'userQuestions') }
      async ask(request: { agent?: unknown; questions: unknown; signal?: AbortSignal; wait?: unknown }) {
@@ -435,175 +417,52 @@ export class HostRoot {
        return Promise.race([result, cancelled]).finally(() => signal.removeEventListener('abort', cancel))
      }
    }
-    const SPAWN_PROVIDER = Object.freeze({
-      name: 'spawn',
-      inheritsParentContext: false,
-      capabilities: Object.freeze({ persona: true, toolFilter: true, agentOptions: true }),
-    })
-    const PERSONA_ORDER = 0
-    class SubagentsShim extends Service {
-      constructor(ctx: any) { super(ctx, 'subagents') }
-      getProvider(name: unknown) { return name === 'spawn' ? SPAWN_PROVIDER : undefined }
-      async startActivation(request: any) {
-        const invocation = host.toolInvocations.getStore()
-        const owner: OwnerRecord | undefined = (this.ctx as any)[OWNER]
-        const plain = (value: unknown, allowed: string[], what: string): Record<string, unknown> => {
-          if (value === null || typeof value !== 'object' || Array.isArray(value)
-            || ![Object.prototype, null].includes(Object.getPrototypeOf(value))) throw new RpcError(ErrorCode.InvalidParams, `expected a plain ${what} object`)
-          const result: Record<string, unknown> = Object.create(null)
-          for (const key of Reflect.ownKeys(value)) {
-            const descriptor = Object.getOwnPropertyDescriptor(value, key)!
-            if (typeof key !== 'string' || !allowed.includes(key) || !('value' in descriptor)) throw new RpcError(ErrorCode.NotAvailable, `unsupported ${what} property ${String(key)}`)
-            if (descriptor.value !== undefined) result[key] = descriptor.value
-          }
-          return result
-        }
-        const input = plain(request, ['provider', 'label', 'childId', 'request', 'signal', 'delivery'], 'activation')
-        if (input.provider !== 'spawn') throw new RpcError(ErrorCode.NotAvailable, 'only the spawn provider is available')
-        const spawn = plain(input.request, ['parent', 'prompt', 'agentOptions'], 'spawn request')
-        const options = spawn.agentOptions === undefined ? {} : plain(spawn.agentOptions, ['model'], 'agentOptions')
-        if (options.model !== undefined && typeof options.model !== 'string') throw new RpcError(ErrorCode.InvalidParams, 'agentOptions.model must be a string')
-        const delivery = input.delivery === undefined ? 'parent' : input.delivery
-        if (delivery !== 'caller' && delivery !== 'parent') throw new RpcError(ErrorCode.InvalidParams, 'delivery must be caller or parent')
-        const childId = input.childId
-        if (typeof childId !== 'string' || !/^[A-Za-z0-9_.:-]{1,128}$/.test(childId)) throw new RpcError(ErrorCode.InvalidParams, 'childId must be 1-128 letters, digits, or _.:-')
-        if (!Array.isArray(spawn.prompt) || spawn.prompt.length === 0) throw new RpcError(ErrorCode.InvalidParams, 'prompt must be a non-empty content array')
-        const prompt = spawn.prompt.map((block: unknown) => {
-          const item = plain(block, ['type', 'text'], 'prompt block')
-          if (item.type !== 'text' || typeof item.text !== 'string') throw new RpcError(ErrorCode.NotAvailable, 'only text prompt blocks are supported')
-          return item.text
-        }).join('')
-        if (input.signal !== undefined && !(input.signal instanceof AbortSignal)) throw new RpcError(ErrorCode.InvalidParams, 'signal must be an AbortSignal')
-        if (!invocation || !invocation.active || invocation.signal.aborted || invocation.agent === undefined || spawn.parent !== invocation.agent) {
-          throw new RpcError(ErrorCode.NotAvailable, 'startActivation requires the exact live calling agent as parent')
-        }
-        if (invocation.owner !== owner || owner?.state !== 'active' || owner.disposing) throw new RpcError(ErrorCode.NotAvailable, 'subagents service owner is no longer current')
-        if (invocation.delegated || invocation.subagentTicket === undefined) throw new RpcError(ErrorCode.NotAvailable, 'child agents are only available to a root tool invocation')
-        const signal = input.signal === undefined ? invocation.signal : AbortSignal.any([invocation.signal, input.signal as AbortSignal])
-        signal.throwIfAborted()
-        let persona: string | undefined
-        const denied = new Set<string>()
-        let open = true
-        const sealed = () => { if (!open) throw new RpcError(ErrorCode.NotAvailable, 'the child creation window has closed') }
-        const child = Object.freeze({
-          id: childId,
-          ctx: Object.freeze({
-            systemPrompt: Object.freeze({
-              getSectionOrder(name: unknown) {
-                sealed()
-                if (name !== 'DEPLOYMENT_PERSONA_PREFIX') throw new RpcError(ErrorCode.NotAvailable, 'only the deployment persona slot is available')
-                return PERSONA_ORDER
-              },
-              section(section: unknown) {
-                sealed()
-                const value = plain(section, ['name', 'order', 'text'], 'system prompt section')
-                if (value.name !== PERSONA_PREFIX_SECTION || value.order !== PERSONA_ORDER || typeof value.text !== 'string') {
-                  throw new RpcError(ErrorCode.NotAvailable, 'only the child deployment persona section is supported')
-                }
-                if (persona !== undefined) throw new RpcError(ErrorCode.InvalidParams, 'the child persona is already set')
-                if (Buffer.byteLength(value.text) > 32 * 1024) throw new RpcError(ErrorCode.InvalidParams, 'child persona exceeds 32768 bytes')
-                persona = value.text
-                return () => undefined
-              },
-            }),
-            tools: Object.freeze({
-              restrict(filter: unknown) {
-                sealed()
-                const value = plain(filter, ['deny'], 'tool filter')
-                if (!Array.isArray(value.deny) || value.deny.some(name => typeof name !== 'string' || name === '')) throw new RpcError(ErrorCode.InvalidParams, 'deny must be a list of tool names')
-                for (const name of value.deny as string[]) denied.add(name)
-                return () => undefined
-              },
-            }),
-          }),
-        })
-        const listeners = ((host.root as any).events?._hooks?.['agent/created'] ?? [])
-          .filter((hook: any) => !hook.global && hook.ctx?.[OWNER] === owner)
-          .map((hook: any) => hook.callback)
-        try {
-          await Promise.all(listeners.map(async (callback: Function) => callback({ agent: child })))
-        } finally {
-          open = false
-        }
-        signal.throwIfAborted()
-        const call = invocation
-        const rpc = (method: string, params: Record<string, unknown>, abort: AbortSignal) =>
-          host.rpc.request<any>(method, { owner: call.owner.ref, ticket: call.subagentTicket, child_id: childId, ...params }, abort)
-        const started = await rpc('subagent/start', {
-          prompt,
-          ...(options.model === undefined ? {} : { model: options.model }),
-          ...(persona === undefined ? {} : { persona }),
-          denied_tools: [...denied],
-          delivery,
-        }, signal)
-        if (started === null || typeof started !== 'object' || started.child_id !== childId || typeof started.message_id !== 'string') {
-          throw new RpcError(ErrorCode.Internal, 'invalid child activation receipt')
-        }
-        let result: Promise<unknown> | undefined
-        let disposed: Promise<void> | undefined
-        return Object.freeze({
-          childId,
-          messageId: started.message_id,
-          get result() {
-            result ??= rpc('subagent/result', {}, call.signal).then((value: any) => {
-              if (value === null || typeof value !== 'object' || typeof value.stop_reason !== 'string' || !Array.isArray(value.output)) {
-                throw new RpcError(ErrorCode.Internal, 'invalid child result receipt')
-              }
-              return Object.freeze({
-                stopReason: value.stop_reason,
-                output: Object.freeze(value.output.map((block: any) => Object.freeze({ type: 'text', text: String(block.text) }))),
-                ...(value.omitted_blocks > 0 ? { diagnostic: `${value.omitted_blocks} non-text output block(s) are not supported` } : {}),
-              })
-            })
-            return result
-          },
-          dispose() {
-            disposed ??= rpc('subagent/dispose', {}, call.signal).then(() => undefined)
-            return disposed
-          },
-        })
-      }
-    }
-    class AgentsShim extends Service {
-      constructor(ctx: any) { super(ctx, 'agents') }
-    }
-    class SystemPromptShim extends Service {
-      constructor(ctx: any) { super(ctx, 'systemPrompt') }
-      section() { throw new RpcError(ErrorCode.NotAvailable, "system prompt sections are only available on a child agent's agent/created context") }
-      getSectionOrder() { throw new RpcError(ErrorCode.NotAvailable, "system prompt sections are only available on a child agent's agent/created context") }
-    }
-    Object.freeze(SubagentsShim.prototype)
-    Object.freeze(AgentsShim.prototype)
-    Object.freeze(SystemPromptShim.prototype)
    Object.freeze(UserQuestionsShim.prototype)
-    Object.freeze(SessionsShim.prototype)
    Object.freeze(StorageShim.prototype)
-    shimClasses.set('tools', ToolsShim)
-    shimClasses.set('commands', CommandsShim)
-    shimClasses.set('prompt', PromptShim)
-    shimClasses.set('storage', StorageShim)
-    shimClasses.set('sessions', SessionsShim)
-    shimClasses.set('userQuestions', UserQuestionsShim)
-    shimClasses.set('subagents', SubagentsShim)
-    shimClasses.set('agents', AgentsShim)
-    shimClasses.set('systemPrompt', SystemPromptShim)
-    shimClasses.set('skills', SkillsShim)
-    shimClasses.set('avatars', AvatarsShim)
-    shimClasses.set('mcp',McpShim)
-    shimClasses.set('shellHooks',ShellHooksShim)
-    root.plugin(ToolsShim)
-    root.plugin(CommandsShim)
-    root.plugin(PromptShim)
-    root.plugin(StorageShim)
-    root.plugin(SessionsShim)
-    root.plugin(UserQuestionsShim)
-    root.plugin(SubagentsShim)
-    root.plugin(AgentsShim)
-    root.plugin(SystemPromptShim)
-    root.plugin(SkillsShim)
-    root.plugin(AvatarsShim)
-    root.plugin(McpShim)
-    root.plugin(ShellHooksShim)
+    const adapterHost: AdapterHost = {
+      tier,
+      rpc,
+      ownerOf: (ctx) => (ctx as { [OWNER]?: OwnerRecord })[OWNER],
+      liveInvocation: (ctx) => {
+        const invocation = host.toolInvocations.getStore()
+        const owner: OwnerRecord | undefined = (ctx as { [OWNER]?: OwnerRecord })[OWNER]
+        return invocation && invocation.active && !invocation.signal.aborted && owner !== undefined
+          && invocation.owner === owner && owner.state === 'active' && !owner.disposing
+          ? invocation
+          : undefined
+      },
+      log: (level, message, owner) => host.log(level, message, owner),
+      broker: async (ctx, service, method, input) => {
+        const invocation = adapterHost.liveInvocation(ctx)
+        const ticket = invocation?.brokerTickets.get(service)
+        if (invocation === undefined || ticket === undefined) throw new RpcError(ErrorCode.NotAvailable, `the ${String(service).slice(0, 64)} broker is only available to a live tool invocation the core gave a ticket for it`)
+        return rpc.request<unknown>('dsh/broker', { owner: invocation.owner.ref, ticket, service, method, input }, invocation.signal)
+      },
+    }
+    const shims = new Map<string, new (ctx: any) => Service>([
+      ['tools', ToolsShim],
+      ['commands', CommandsShim],
+      ['prompt', PromptShim],
+      ['storage', StorageShim],
+      ['userQuestions', UserQuestionsShim],
+      ['skills', SkillsShim],
+      ['avatars', AvatarsShim],
+      ['mcp', McpShim],
+      ['shellHooks', ShellHooksShim],
+    ])
+    for (const adapter of adapters) {
+      if (shims.has(adapter.service)) throw new Error(`DSH adapter for \`${adapter.service}\` duplicates a service the host root already provides`)
+      shims.set(adapter.service, adapter.define(adapterHost))
+    }
+    const mismatched = [
+      ...[...shims.keys()].filter((name) => !PROVIDED_SERVICES.has(name)).map((name) => `${name} is installed but not declared in compatibility.json`),
+      ...[...PROVIDED_SERVICES].filter((name) => !CORDIS_SERVICES.has(name) && !shims.has(name)).map((name) => `${name} is declared in compatibility.json but has no installed service`),
+    ]
+    if (mismatched.length > 0) throw new Error(`DSH provided services disagree with the installed services: ${mismatched.join('; ')}`)
+    for (const [name, shim] of shims) {
+      shimClasses.set(name, shim)
+      root.plugin(shim)
+    }
    shimClasses.set('loader', ReviewedLoader)
    installCompositionLoader(root)
  }
@@ -714,7 +573,9 @@ export class HostRoot {
      const plugin = pickPlugin(module)
      const missing = Object.keys(Inject.resolve(plugin.inject)).filter((name) => !PROVIDED_SERVICES.has(name))
      if (missing.length > 0) {
-        throw new Error(`requires ${missing.map((name) => `\`${name}\``).join(', ')}, not provided by the Codewhale extension host in this phase`)
+        const owned = missing.filter((name) => REFUSED_SERVICES.has(name))
+        throw new Error(`requires ${missing.map((name) => `\`${name}\``).join(', ')}, not provided by the Codewhale extension host in this phase`
+          + (owned.length > 0 ? `; ${owned.map((name) => `\`${name}\``).join(', ')} belong${owned.length === 1 ? 's' : ''} to the Codewhale core and no reviewed bridge exposes ${owned.length === 1 ? 'it' : 'them'} yet` : ''))
      }
      const ownerCtx = this.root.extend({ [OWNER]: owner })
      const fiber = ownerStorage.run(owner, () => ownerCtx.plugin(plugin, params.config ?? {}))
@@ -873,6 +734,7 @@ export class HostRoot {
      agent,
      questionTicket: identity?.question_ticket,
      subagentTicket: identity?.subagent_ticket,
+      brokerTickets: new Map((identity?.broker_tickets ?? []).map(({ service, ticket }) => [service, ticket])),
      callerTools: Object.freeze([...(identity?.caller_tools ?? [])]),
      delegated: identity?.agent_id !== undefined,
      ticket: identity?.checkpoint_ticket,
@@ -943,6 +805,7 @@ export class HostRoot {
 interface InvocationIdentityWire {
  question_ticket?: string
  subagent_ticket?: string
+  broker_tickets?: { service: string, ticket: string }[]
  caller_tools?: string[]
  checkpoint_ticket?: string
  session_id?: string
@@ -0,0 +1,71 @@
+import { test, before } from 'node:test'
+import assert from 'node:assert/strict'
+import { mkdtempSync, rmSync } from 'node:fs'
+import { join, dirname } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+import { build } from 'esbuild'
+
+const here = dirname(fileURLToPath(import.meta.url))
+const rpc = { request: async () => ({}), notify: () => {}, tier: 'plugin' }
+let HostRoot
+let Service
+let DSH_ADAPTERS
+
+before(async () => {
+  const dir = mkdtempSync(join(here, '..', 'node_modules', '.cw-adapters-'))
+  const outfile = join(dir, 'root.mjs')
+  await build({
+    entryPoints: [join(here, '../src/root.ts')],
+    outfile,
+    bundle: true,
+    platform: 'node',
+    format: 'esm',
+    packages: 'external',
+    absWorkingDir: join(here, '..'),
+    logLevel: 'silent',
+  })
+  const adapters = join(dir, 'adapters.mjs')
+  await build({
+    entryPoints: [join(here, '../src/dsh/adapters.ts')],
+    outfile: adapters,
+    bundle: true,
+    platform: 'node',
+    format: 'esm',
+    packages: 'external',
+    absWorkingDir: join(here, '..'),
+    logLevel: 'silent',
+  })
+  ;({ HostRoot } = await import(pathToFileURL(outfile).href))
+  ;({ DSH_ADAPTERS } = await import(pathToFileURL(adapters).href))
+  ;({ Service } = await import('@deepseek-ai/cordis'))
+  process.on('exit', () => rmSync(dir, { recursive: true, force: true }))
+})
+
+const adapterFor = (service) => ({ service, define: () => class extends Service { constructor(ctx) { super(ctx, service) } } })
+
+test('the shipped adapter table holds the reviewed adapters, and the root still builds', () => {
+  assert.deepEqual(DSH_ADAPTERS.map((adapter) => adapter.service), ['sessions', 'systemPrompt', 'subagents', 'agents', 'remote'])
+  assert.ok(new HostRoot(rpc, 'plugin'))
+  assert.ok(new HostRoot(rpc, 'builtin'))
+})
+
+test('an adapter for a service compatibility.json does not declare is refused at construction', () => {
+  assert.throws(() => new HostRoot(rpc, 'plugin', [...DSH_ADAPTERS, adapterFor('llm')]), /llm is installed but not declared in compatibility\.json/)
+})
+
+test('an adapter may not replace a service the root already provides', () => {
+  assert.throws(() => new HostRoot(rpc, 'plugin', [adapterFor('storage')]), /duplicates a service the host root already provides/)
+  assert.throws(() => new HostRoot(rpc, 'plugin', [...DSH_ADAPTERS, adapterFor('sessions')]), /duplicates a service/)
+})
+
+test('the adapter broker refuses locally, without sending, when no live invocation holds a ticket for the service', async () => {
+  const sent = []
+  const peer = { ...rpc, request: async (method, params) => { sent.push([method, params]); return {} } }
+  let host
+  const capture = { service: 'llm', define: (adapterHost) => { host = adapterHost; return adapterFor('llm').define() } }
+  assert.throws(() => new HostRoot(peer, 'plugin', [capture]), /not declared in compatibility\.json/)
+  for (const service of ['workspace', 'llm', 'vault']) {
+    await assert.rejects(host.broker({}, service, 'read', {}), (error) => error.code === -32001 && /broker is only available to a live tool invocation/.test(error.message))
+  }
+  assert.deepEqual(sent, [])
+})
@@ -0,0 +1,72 @@
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { activate, startHost } from './harness.mjs'
+import { ErrorCode } from '../dist/protocol.mjs'
+
+const PLUGIN = `
+export const inject = ['tools', 'subagents', 'agents']
+export function apply(ctx) {
+  ctx.on('agent/created', ({ agent }) => {
+    agent.ctx.systemPrompt.section({ name: 'deployment:persona-prefix', order: agent.ctx.systemPrompt.getSectionOrder('DEPLOYMENT_PERSONA_PREFIX'), text: 'Reviewer persona' })
+    agent.ctx.tools.restrict({ deny: ['exec_shell'] })
+  })
+  ctx.tools.register({ name: 'team_start', description: 'Start one child agent.', parameters: { type: 'object' },
+    async execute(input, exec) {
+      try {
+        const parent = input.forged ? { id: exec.agent?.id } : exec.agent
+        const handle = await ctx.subagents.startActivation({
+          provider: 'spawn', childId: input.childId ?? 'reviewer-1', delivery: 'caller',
+          request: { parent, prompt: [{ type: 'text', text: 'Review the diff' }] },
+        })
+        const result = await handle.result
+        await handle.dispose()
+        return { messageId: handle.messageId, stopReason: result.stopReason, text: result.output.map(block => block.text).join('') }
+      } catch (error) {
+        return { refused: error.code ?? String(error) }
+      }
+    },
+  })
+}
+`
+
+test('the agents adapters serve subagents and agents through the reviewed adapter table', async (t) => {
+  const host = await startHost({
+    subagent: (params, _id, method) => method === 'subagent/start'
+      ? { child_id: params.child_id, message_id: 'message-1' }
+      : method === 'subagent/result'
+        ? { stop_reason: 'end_turn', output: [{ type: 'text', text: 'looks good' }], omitted_blocks: 0 }
+        : {},
+  })
+  t.after(() => host.stop())
+  const dir = mkdtempSync(join(tmpdir(), 'cw-agents-'))
+  t.after(() => rmSync(dir, { recursive: true, force: true }))
+  const entry = join(dir, 'index.mjs')
+  writeFileSync(entry, PLUGIN)
+  const { ref, result } = await activate(host, 'agent-team', entry)
+  assert.deepEqual(result, { status: 'ok', tools: ['team_start'], commands: [] })
+  const handle = host.registry.find(row => row.op === 'register' && row.spec.name === 'team_start').handle
+  const call = (input, identity) => host.call('tool/call', { handle, call_id: 'team', input, deadline_ms: 5000, ...identity })
+  const root = { session_id: 'session-root', workspace: '/workspace/team', subagent_ticket: 'subagent-ticket-1' }
+
+  assert.deepEqual((await call({}, root)).structured, { messageId: 'message-1', stopReason: 'end_turn', text: 'looks good' })
+  assert.deepEqual(host.subagents.map(row => row.method), ['subagent/start', 'subagent/result', 'subagent/dispose'])
+  const [start] = host.subagents
+  assert.deepEqual(start.owner, ref)
+  assert.equal(start.ticket, 'subagent-ticket-1')
+  assert.equal(start.child_id, 'reviewer-1')
+  assert.equal(start.prompt, 'Review the diff')
+  assert.equal(start.persona, 'Reviewer persona')
+  assert.deepEqual(start.denied_tools, ['exec_shell'])
+  assert.equal(start.delivery, 'caller')
+  assert.ok(host.subagents.every(row => row.ticket === 'subagent-ticket-1' && row.child_id === 'reviewer-1'))
+
+  const before = host.subagents.length
+  assert.deepEqual((await call({}, { ...root, agent_id: 'agent-child' })).structured, { refused: ErrorCode.NotAvailable }, 'a delegated caller cannot nest child agents')
+  assert.deepEqual((await call({}, { session_id: 'session-root', workspace: '/workspace/team' })).structured, { refused: ErrorCode.NotAvailable }, 'no subagent ticket, no child')
+  assert.deepEqual((await call({ forged: true }, root)).structured, { refused: ErrorCode.NotAvailable }, 'a forged parent is not the live caller')
+  assert.deepEqual((await call({ childId: 'bad id' }, root)).structured, { refused: ErrorCode.InvalidParams })
+  assert.equal(host.subagents.length, before, 'refused activations never reach the core')
+})
@@ -0,0 +1,48 @@
+import assert from 'node:assert/strict'
+import { createHash } from 'node:crypto'
+import { readFileSync, readdirSync, statSync } from 'node:fs'
+import { dirname, join, relative, sep } from 'node:path'
+import { test } from 'node:test'
+import { fileURLToPath } from 'node:url'
+
+const here = dirname(fileURLToPath(import.meta.url))
+const pin = join(here, '..', 'src', 'dsh', 'upstream', 'creator')
+const manifest = JSON.parse(readFileSync(join(pin, 'UPSTREAM.json'), 'utf8'))
+const sha256 = (bytes) => createHash('sha256').update(bytes).digest('hex')
+
+function walk(dir) {
+  return readdirSync(dir).flatMap((name) => {
+    const path = join(dir, name)
+    return statSync(path).isDirectory() ? walk(path) : [path]
+  })
+}
+
+test('every pinned creator file equals its recorded hash and is verbatim', () => {
+  assert.equal(manifest.version, '0.2.2-rc.1')
+  assert.ok(manifest.files.length >= 2)
+  for (const entry of manifest.files) {
+    assert.equal(entry.verbatim, true, entry.path)
+    const bytes = readFileSync(join(pin, entry.path))
+    assert.equal(bytes.length, entry.bytes, `${entry.path} size`)
+    assert.equal(sha256(bytes), entry.sha256, `${entry.path} hash`)
+    assert.ok(!bytes.includes(13), `${entry.path} must keep LF line endings`)
+  }
+})
+
+test('the pin directory holds exactly the files the manifest lists', () => {
+  const listed = new Set([...manifest.files.map((entry) => entry.path), 'UPSTREAM.json', 'LICENSE', 'README.md'])
+  const present = walk(pin).map((path) => relative(pin, path).split(sep).join('/'))
+  assert.deepEqual(present.sort(), [...listed].sort())
+})
+
+test('the licence is the MIT text the four packages ship', () => {
+  const license = readFileSync(join(pin, 'LICENSE'))
+  assert.equal(sha256(license), manifest.license_sha256)
+  assert.match(license.toString('utf8'), /^MIT License\n\nCopyright \(c\) 2026 DeepSeek\n/)
+  assert.deepEqual(manifest.packages.sort(), [
+    '@deepseek-ai/dsh-agent-preset',
+    '@deepseek-ai/dsh-plugin-manager',
+    '@deepseek-ai/dsh-sandbox',
+    '@deepseek-ai/dsh-tool-cordis',
+  ])
+})
@@ -51,7 +51,7 @@ export const LIMITS = { max_frame: 32 * 1024 * 1024, max_inflight: 256, dispose_
 * cancelled is not answered. Requests are recorded in `coreCalls`, the host's
 * `$/cancel` ids in `cancels`.
 */
-export async function startHost({ admit, env, ownGroup = false, tier = 'plugin', coreCall, checkpoint, userQuestions, compiledHost, cwd } = {}) {
+export async function startHost({ admit, env, ownGroup = false, tier = 'plugin', coreCall, checkpoint, userQuestions, subagent, compiledHost, cwd } = {}) {
  const started = performance.now()
  // `ownGroup` spawns the host as a process-group leader and tells it so, as
  // the Rust core does on Unix.
@@ -73,6 +73,7 @@ export async function startHost({ admit, env, ownGroup = false, tier = 'plugin',
    coreCalls: [],
    checkpoints: [],
    questions: [],
+    subagents: [],
    cancels: [],
    registry: [],
    hello: null,
@@ -146,11 +147,15 @@ export async function startHost({ admit, env, ownGroup = false, tier = 'plugin',
            break
          case 'session/checkpoint':
          case 'user-questions/ask':
+          case 'subagent/start':
+          case 'subagent/result':
+          case 'subagent/dispose':
          case 'core/call': {
-            const handler = message.method === 'session/checkpoint' ? checkpoint : message.method === 'user-questions/ask' ? userQuestions : coreCall
-            const records = message.method === 'session/checkpoint' ? host.checkpoints : message.method === 'user-questions/ask' ? host.questions : host.coreCalls
-            records.push({ id: message.id, ...message.params })
-            const answer = handler ? handler(message.params, message.id) : { error: { code: -32002, message: 'no handler for ' + message.method } }
+            const childRequest = message.method.startsWith('subagent/')
+            const handler = message.method === 'session/checkpoint' ? checkpoint : message.method === 'user-questions/ask' ? userQuestions : childRequest ? subagent : coreCall
+            const records = message.method === 'session/checkpoint' ? host.checkpoints : message.method === 'user-questions/ask' ? host.questions : childRequest ? host.subagents : host.coreCalls
+            records.push({ id: message.id, ...(childRequest ? { method: message.method } : {}), ...message.params })
+            const answer = handler ? handler(message.params, message.id, message.method) : { error: { code: -32002, message: 'no handler for ' + message.method } }
            const id = message.id
            Promise.resolve(answer).then((value) => {
              if (host.cancels.includes(id) || child.exitCode !== null || stopping) return
@@ -174,6 +174,7 @@ test('injecting a service the host does not provide fails with its name', async
  const { result } = await activate(host, 'needs-secrets', plugin.entry)
  assert.equal(result.status, 'failed')
  assert.match(result.diagnostic, /requires `secrets`/)
+  assert.doesNotMatch(result.diagnostic, /belongs? to the Codewhale core/)
  const provided = tempPlugin("export const inject = ['shellHooks', 'sessions', 'userQuestions']; export function apply(ctx) { if (!ctx.shellHooks || typeof ctx.sessions.flush !== 'function' || typeof ctx.userQuestions.ask !== 'function') throw new Error('missing provided service') }\n")
  t.after(() => provided.cleanup())
  const available = await activate(host, 'needs-shell-hooks', provided.entry)
@@ -187,6 +188,7 @@ export function apply() { createUserMessage({ content: [], source: { kind: 'fixt
    const refused = (await activate(host, `pure-needs-${service}`, pure.entry)).result
    assert.equal(refused.status, 'failed')
    assert.ok(refused.diagnostic.includes('requires `' + service + '`'), refused.diagnostic)
+    assert.match(refused.diagnostic, /`llm` belongs to the Codewhale core and no reviewed bridge exposes it yet/)
  }
 })

@@ -0,0 +1,88 @@
+import { test, before } from 'node:test'
+import assert from 'node:assert/strict'
+import { mkdtempSync, rmSync } from 'node:fs'
+import { join, dirname } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+import { build } from 'esbuild'
+
+const here = dirname(fileURLToPath(import.meta.url))
+let credentialsAdapter
+let brokeredFetch
+
+before(async () => {
+  const dir = mkdtempSync(join(here, '..', 'node_modules', '.cw-network-'))
+  const outfile = join(dir, 'network.mjs')
+  await build({ entryPoints: [join(here, '../src/dsh/network.ts')], outfile, bundle: true, platform: 'node', format: 'esm', packages: 'external', absWorkingDir: join(here, '..'), logLevel: 'silent' })
+  ;({ credentialsAdapter, brokeredFetch } = await import(pathToFileURL(outfile).href))
+  process.on('exit', () => rmSync(dir, { recursive: true, force: true }))
+})
+
+function brokerHost(answers) {
+  const calls = []
+  return {
+    calls,
+    host: {
+      tier: 'plugin',
+      broker: async (ctx, service, method, input) => {
+        calls.push({ service, method, input })
+        const answer = answers[method]
+        if (answer instanceof Error) throw answer
+        return typeof answer === 'function' ? answer(input) : answer
+      },
+    },
+  }
+}
+
+test('credentials resolve to an opaque handle and go only to the network broker', async () => {
+  const { host, calls } = brokerHost({
+    'credentials.resolve': { ref: 'KEY', value: 'codewhale-credential:KEY' },
+    'credentials.describe': { ref: 'KEY', set: true },
+    'credentials.set': { ref: 'KEY', set: true },
+  })
+  const Credentials = credentialsAdapter.define(host)
+  const service = Object.create(Credentials.prototype)
+  service.ctx = {}
+  assert.deepEqual(await service.resolve('KEY'), { value: 'codewhale-credential:KEY' })
+  assert.deepEqual(await service.describe('KEY'), { ref: 'KEY', set: true })
+  await service.set('KEY', 'sk-secret')
+  assert.deepEqual(calls.map((c) => [c.service, c.method]), [
+    ['network', 'credentials.resolve'], ['network', 'credentials.describe'], ['network', 'credentials.set'],
+  ])
+  await assert.rejects(service.resolve(''), /non-empty/)
+})
+
+test('a resolve answer that is not a handle is refused rather than passed on', async () => {
+  const { host } = brokerHost({ 'credentials.resolve': { value: 'sk-raw' } })
+  const service = Object.create(credentialsAdapter.define(host).prototype)
+  service.ctx = {}
+  await assert.rejects(service.resolve('KEY'), /invalid credential handle/)
+  const unset = Object.create(credentialsAdapter.define(brokerHost({ 'credentials.resolve': { value: null } }).host).prototype)
+  unset.ctx = {}
+  assert.equal(await unset.resolve('KEY'), undefined)
+})
+
+test('brokeredFetch sends a typed fetch and rebuilds a Response from the broker answer', async () => {
+  const { host, calls } = brokerHost({
+    fetch: {
+      status: 201, url: 'https://api.example.com/v1/x', redirected: true,
+      headers: [['content-type', 'application/json']],
+      body_base64: Buffer.from('{"ok":true}').toString('base64'),
+    },
+  })
+  const response = await brokeredFetch(host, {}, 'https://api.example.com/v1/x', {
+    method: 'POST', headers: { authorization: 'Bearer codewhale-credential:KEY' }, body: 'hi',
+  })
+  assert.equal(response.status, 201)
+  assert.equal(response.url, 'https://api.example.com/v1/x')
+  assert.equal(response.redirected, true)
+  assert.deepEqual(await response.json(), { ok: true })
+  assert.equal(calls[0].service, 'network')
+  assert.equal(calls[0].method, 'fetch')
+  assert.deepEqual(calls[0].input.headers, [['authorization', 'Bearer codewhale-credential:KEY']])
+  assert.equal(Buffer.from(calls[0].input.body_base64, 'base64').toString(), 'hi')
+})
+
+test('a broker refusal reaches the plugin as the refusal', async () => {
+  const { host } = brokerHost({ fetch: new Error('egress refused: `evil.example` is not one of this plugin\'s reviewed network hosts') })
+  await assert.rejects(brokeredFetch(host, {}, 'https://evil.example/'), /egress refused/)
+})
@@ -0,0 +1,68 @@
+import { test, before } from 'node:test'
+import assert from 'node:assert/strict'
+import { mkdtempSync, rmSync } from 'node:fs'
+import { join, dirname } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+import { build } from 'esbuild'
+
+const here = dirname(fileURLToPath(import.meta.url))
+let remoteAdapter
+let Context
+let ErrorCode
+
+before(async () => {
+  const dir = mkdtempSync(join(here, '..', 'node_modules', '.cw-remote-'))
+  const bundle = async (entry, name) => {
+    const outfile = join(dir, name)
+    await build({ entryPoints: [join(here, entry)], outfile, bundle: true, platform: 'node', format: 'esm', packages: 'external', absWorkingDir: join(here, '..'), logLevel: 'silent' })
+    return import(pathToFileURL(outfile).href)
+  }
+  ;({ remoteAdapter } = await bundle('../src/dsh/remote.ts', 'remote.mjs'))
+  ;({ ErrorCode } = await bundle('../src/protocol.ts', 'protocol.mjs'))
+  ;({ Context } = await import('@deepseek-ai/cordis'))
+  process.on('exit', () => rmSync(dir, { recursive: true, force: true }))
+})
+
+const settle = () => new Promise((resolve) => setTimeout(resolve, 0))
+
+async function harness() {
+  const calls = []
+  const host = {
+    tier: 'plugin',
+    rpc: { request: async () => { throw new Error('remote never calls the core directly') }, notify() {} },
+    ownerOf: () => undefined,
+    liveInvocation: () => undefined,
+    broker: async (ctx, service, method, input) => { calls.push([service, method, input]); return { ok: method } },
+    log() {},
+  }
+  const ctx = new Context()
+  ctx.plugin(remoteAdapter.define(host))
+  await settle()
+  return { ctx, calls }
+}
+
+test('remote sends every method through the remote broker with a typed payload and nothing else', async () => {
+  const { ctx, calls } = await harness()
+  assert.deepEqual(await ctx.remote.status(), { ok: 'status' })
+  await ctx.remote.pair()
+  await ctx.remote.pair({ label: 'phone' })
+  await ctx.remote.clients()
+  await ctx.remote.revoke('cwrg_1')
+  assert.deepEqual(calls, [
+    ['remote', 'status', {}],
+    ['remote', 'pair', {}],
+    ['remote', 'pair', { label: 'phone' }],
+    ['remote', 'clients', {}],
+    ['remote', 'revoke', { grant: 'cwrg_1' }],
+  ])
+})
+
+test('remote refuses malformed arguments locally, before any broker call', async () => {
+  const { ctx, calls } = await harness()
+  assert.throws(() => ctx.remote.pair({ label: 3 }), (error) => error.code === ErrorCode.InvalidParams)
+  for (const id of [undefined, '', 7, 'x'.repeat(129)]) {
+    assert.throws(() => ctx.remote.revoke(id), (error) => error.code === ErrorCode.InvalidParams)
+  }
+  assert.equal(typeof ctx.remote.listen, 'undefined')
+  assert.deepEqual(calls, [])
+})
@@ -0,0 +1,85 @@
+import { test, before } from 'node:test'
+import assert from 'node:assert/strict'
+import { mkdtempSync, rmSync } from 'node:fs'
+import { join, dirname } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+import { build } from 'esbuild'
+
+const here = dirname(fileURLToPath(import.meta.url))
+let sessionsAdapter
+let systemPromptAdapter
+let Context
+let ErrorCode
+
+before(async () => {
+  const dir = mkdtempSync(join(here, '..', 'node_modules', '.cw-session-prompt-'))
+  const bundle = async (entry, name) => {
+    const outfile = join(dir, name)
+    await build({ entryPoints: [join(here, entry)], outfile, bundle: true, platform: 'node', format: 'esm', packages: 'external', absWorkingDir: join(here, '..'), logLevel: 'silent' })
+    return import(pathToFileURL(outfile).href)
+  }
+  ;({ sessionsAdapter, systemPromptAdapter } = await bundle('../src/dsh/session-prompt.ts', 'session-prompt.mjs'))
+  ;({ ErrorCode } = await bundle('../src/protocol.ts', 'protocol.mjs'))
+  ;({ Context } = await import('@deepseek-ai/cordis'))
+  process.on('exit', () => rmSync(dir, { recursive: true, force: true }))
+})
+
+const settle = () => new Promise((resolve) => setTimeout(resolve, 0))
+
+function flushHarness(invocation, requests) {
+  const session = {}
+  const host = {
+    tier: 'plugin',
+    rpc: { request: async (method, params) => { requests.push({ method, params }); return true }, notify() {} },
+    ownerOf: () => invocation?.owner,
+    liveInvocation: () => invocation,
+    log() {},
+  }
+  const ctx = new Context()
+  ctx.plugin(sessionsAdapter.define(host))
+  return { ctx, session }
+}
+
+const live = (extra = {}) => {
+  const session = {}
+  return { owner: { ref: { plugin_id: 'p' } }, session, ticket: 'ticket', signal: new AbortController().signal, pending: Promise.resolve(), ...extra }
+}
+
+test('sessions.flush refuses a live invocation that carries no checkpoint ticket', async () => {
+  const requests = []
+  const invocation = live({ ticket: undefined })
+  const { ctx } = flushHarness(invocation, requests)
+  await settle()
+  await assert.rejects(ctx.sessions.flush(invocation.session), (error) => error.code === ErrorCode.NotAvailable)
+  assert.equal(requests.length, 0)
+})
+
+test('sessions.flush refuses a session other than the invocation session and sends nothing', async () => {
+  const requests = []
+  const invocation = live()
+  const { ctx } = flushHarness(invocation, requests)
+  await settle()
+  await assert.rejects(ctx.sessions.flush({}), (error) => error.code === ErrorCode.NotAvailable)
+  await assert.rejects(ctx.sessions.flush(undefined), (error) => error.code === ErrorCode.NotAvailable)
+  assert.equal(requests.length, 0)
+})
+
+test('sessions.flush sends the exact owner and ticket, and a stale invocation is refused before the receipt returns', async () => {
+  const requests = []
+  const invocation = live()
+  let current = invocation
+  const host = { tier: 'plugin', rpc: { request: async (method, params) => { requests.push({ method, params }); current = undefined; return true }, notify() {} }, ownerOf: () => invocation.owner, liveInvocation: () => current, log() {} }
+  const ctx = new Context()
+  ctx.plugin(sessionsAdapter.define(host))
+  await settle()
+  await assert.rejects(ctx.sessions.flush(invocation.session), (error) => error.code === ErrorCode.NotAvailable)
+  assert.deepEqual(requests, [{ method: 'session/checkpoint', params: { owner: invocation.owner.ref, ticket: 'ticket' } }])
+})
+
+test('systemPrompt stays child-only: the root context refuses sections', async () => {
+  const ctx = new Context()
+  ctx.plugin(systemPromptAdapter.define({}))
+  await settle()
+  assert.throws(() => ctx.systemPrompt.section({ name: 'x', text: 'y' }), (error) => error.code === ErrorCode.NotAvailable)
+  assert.throws(() => ctx.systemPrompt.getSectionOrder('X'), (error) => error.code === ErrorCode.NotAvailable)
+})
@@ -0,0 +1,85 @@
+import { test, before } from 'node:test'
+import assert from 'node:assert/strict'
+import { mkdtempSync, rmSync } from 'node:fs'
+import { join, dirname } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+import { build } from 'esbuild'
+
+const here = dirname(fileURLToPath(import.meta.url))
+let terminalAdapter
+let Context
+let ErrorCode
+
+before(async () => {
+  const dir = mkdtempSync(join(here, '..', 'node_modules', '.cw-terminal-'))
+  const bundle = async (entry, name) => {
+    const outfile = join(dir, name)
+    await build({ entryPoints: [join(here, entry)], outfile, bundle: true, platform: 'node', format: 'esm', packages: 'external', absWorkingDir: join(here, '..'), logLevel: 'silent' })
+    return import(pathToFileURL(outfile).href)
+  }
+  ;({ terminalAdapter } = await bundle('../src/dsh/terminal.ts', 'terminal.mjs'))
+  ;({ ErrorCode } = await bundle('../src/protocol.ts', 'protocol.mjs'))
+  ;({ Context } = await import('@deepseek-ai/cordis'))
+  process.on('exit', () => rmSync(dir, { recursive: true, force: true }))
+})
+
+const settle = () => new Promise((resolve) => setTimeout(resolve, 0))
+
+async function harness() {
+  const calls = []
+  const host = {
+    tier: 'plugin',
+    rpc: { request: async () => { throw new Error('terminal never calls the core directly') }, notify() {} },
+    ownerOf: () => undefined,
+    liveInvocation: () => undefined,
+    broker: async (ctx, service, method, input) => { calls.push([service, method, input]); return { ok: method } },
+    log() {},
+  }
+  const ctx = new Context()
+  ctx.plugin(terminalAdapter.define(host))
+  await settle()
+  return { ctx, calls }
+}
+
+test('terminal sends every method through the terminal broker with a typed payload and nothing else', async () => {
+  const { ctx, calls } = await harness()
+  assert.deepEqual(await ctx.terminal.list(), { ok: 'list' })
+  await ctx.terminal.run('make')
+  await ctx.terminal.run('make', { session: 'build', timeoutSecs: 30, cwd: '/', sandbox_permissions: 'danger' })
+  await ctx.terminal.send('build', 'y\n', { waitMs: 0 })
+  await ctx.terminal.wait('build')
+  await ctx.terminal.wait('build', { timeoutSecs: 600 })
+  await ctx.terminal.cancel('build')
+  await ctx.terminal.reset('build')
+  assert.deepEqual(calls, [
+    ['terminal', 'list', {}],
+    ['terminal', 'run', { command: 'make' }],
+    ['terminal', 'run', { command: 'make', session: 'build', timeout_secs: 30 }],
+    ['terminal', 'send', { session: 'build', text: 'y\n', wait_ms: 0 }],
+    ['terminal', 'wait', { session: 'build' }],
+    ['terminal', 'wait', { session: 'build', timeout_secs: 600 }],
+    ['terminal', 'cancel', { session: 'build' }],
+    ['terminal', 'reset', { session: 'build' }],
+  ])
+})
+
+test('terminal refuses malformed arguments locally, before any broker call', async () => {
+  const { ctx, calls } = await harness()
+  const refused = (act) => assert.throws(act, (error) => error.code === ErrorCode.InvalidParams)
+  for (const command of [undefined, '', 7, ['ls']]) refused(() => ctx.terminal.run(command))
+  for (const name of [undefined, '', 7, '../term-1', 'dsh:b:x', 'a b', 'n'.repeat(65)]) {
+    refused(() => ctx.terminal.run('true', { session: name === undefined ? null : name }))
+    refused(() => ctx.terminal.send(name, 'x'))
+    refused(() => ctx.terminal.wait(name))
+    refused(() => ctx.terminal.cancel(name))
+    refused(() => ctx.terminal.reset(name))
+  }
+  refused(() => ctx.terminal.send('build', ''))
+  for (const secs of [0, 601, 1.5, '30']) {
+    refused(() => ctx.terminal.run('true', { timeoutSecs: secs }))
+    refused(() => ctx.terminal.wait('build', { timeoutSecs: secs }))
+  }
+  refused(() => ctx.terminal.send('build', 'x', { waitMs: 60_001 }))
+  for (const absent of ['spawn', 'kill', 'resize', 'read', 'exec']) assert.equal(typeof ctx.terminal[absent], 'undefined')
+  assert.deepEqual(calls, [])
+})
@@ -0,0 +1,80 @@
+import { test, before } from 'node:test'
+import assert from 'node:assert/strict'
+import { mkdtempSync, rmSync } from 'node:fs'
+import { join, dirname } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+import { build } from 'esbuild'
+
+const here = dirname(fileURLToPath(import.meta.url))
+let workspaceAdapter
+let Context
+let ErrorCode
+
+before(async () => {
+  const dir = mkdtempSync(join(here, '..', 'node_modules', '.cw-workspace-'))
+  const bundle = async (entry, name) => {
+    const outfile = join(dir, name)
+    await build({ entryPoints: [join(here, entry)], outfile, bundle: true, platform: 'node', format: 'esm', packages: 'external', absWorkingDir: join(here, '..'), logLevel: 'silent' })
+    return import(pathToFileURL(outfile).href)
+  }
+  ;({ workspaceAdapter } = await bundle('../src/dsh/workspace.ts', 'workspace.mjs'))
+  ;({ ErrorCode } = await bundle('../src/protocol.ts', 'protocol.mjs'))
+  ;({ Context } = await import('@deepseek-ai/cordis'))
+  process.on('exit', () => rmSync(dir, { recursive: true, force: true }))
+})
+
+const settle = () => new Promise((resolve) => setTimeout(resolve, 0))
+
+async function harness() {
+  const calls = []
+  const host = {
+    tier: 'plugin',
+    rpc: { request: async () => { throw new Error('workspace never calls the core directly') }, notify() {} },
+    ownerOf: () => undefined,
+    liveInvocation: () => undefined,
+    broker: async (ctx, service, method, input) => { calls.push([service, method, input]); return { ok: method } },
+    log() {},
+  }
+  const ctx = new Context()
+  ctx.plugin(workspaceAdapter.define(host))
+  await settle()
+  return { ctx, calls }
+}
+
+test('workspace sends every method through the workspace broker with a typed payload and nothing else', async () => {
+  const { ctx, calls } = await harness()
+  assert.deepEqual(await ctx.workspace.read('src/a.ts'), { ok: 'read' })
+  await ctx.workspace.read('src/a.ts', { startLine: 3, maxLines: 10, follow: true })
+  await ctx.workspace.list()
+  await ctx.workspace.list('src')
+  await ctx.workspace.write('src/b.ts', 'x', { expectedHash: 'h', mode: 0o777 })
+  await ctx.workspace.write('src/c.ts', '')
+  await ctx.workspace.exec(['git', 'rev-parse', '--show-toplevel'], { cwd: '/w', env: { GIT_DIR: '/' }, shell: true })
+  assert.deepEqual(calls, [
+    ['workspace', 'read', { path: 'src/a.ts' }],
+    ['workspace', 'read', { path: 'src/a.ts', start_line: 3, max_lines: 10 }],
+    ['workspace', 'list', {}],
+    ['workspace', 'list', { path: 'src' }],
+    ['workspace', 'write', { path: 'src/b.ts', content: 'x', expected_hash: 'h' }],
+    ['workspace', 'write', { path: 'src/c.ts', content: '' }],
+    ['workspace', 'exec', { argv: ['git', 'rev-parse', '--show-toplevel'], cwd: '/w' }],
+  ])
+})
+
+test('workspace refuses malformed arguments locally, before any broker call', async () => {
+  const { ctx, calls } = await harness()
+  const refused = (act) => assert.throws(act, (error) => error.code === ErrorCode.InvalidParams)
+  for (const bad of [undefined, '', 7, ' a', 'a\nb', 'p'.repeat(513), ['a']]) {
+    refused(() => ctx.workspace.read(bad))
+    refused(() => ctx.workspace.write(bad, 'x'))
+    if (bad !== undefined) refused(() => ctx.workspace.list(bad))
+  }
+  for (const lines of [0, 10_001, 1.5, '3']) refused(() => ctx.workspace.read('a', { maxLines: lines }))
+  refused(() => ctx.workspace.read('a', { startLine: 0 }))
+  for (const content of [undefined, 7, 'c'.repeat(1024 * 1024 + 1)]) refused(() => ctx.workspace.write('a', content))
+  refused(() => ctx.workspace.write('a', 'x', { expectedHash: '' }))
+  for (const command of [undefined, 'git status', [], [7], ['git', 'a\u0000b'], new Array(10).fill('git')]) refused(() => ctx.workspace.exec(command))
+  refused(() => ctx.workspace.exec(['git'], { cwd: '' }))
+  for (const absent of ['delete', 'rename', 'spawn', 'shell', 'watch', 'readSync']) assert.equal(typeof ctx.workspace[absent], 'undefined')
+  assert.deepEqual(calls, [])
+})
@@ -220,9 +220,22 @@ impl CodewhaleClient {
            Some(level) if thinking_capable && supports_adaptive => {
                body["thinking"] = json!({ "type": "adaptive" });
                if !is_minimax {
+                    let row_lists_xhigh = self
+                        .route_facts
+                        .as_ref()
+                        .filter(|facts| facts.wire_model_id == request.model)
+                        .is_some_and(|facts| {
+                            facts.reasoning_options.iter().any(|option| {
+                                option.get("type").and_then(Value::as_str) == Some("effort")
+                                    && option.get("values").and_then(Value::as_array).is_some_and(
+                                        |values| values.iter().any(|v| v.as_str() == Some("xhigh")),
+                                    )
+                            })
+                        });
                    let mapped = match level {
                        "low" | "minimal" => "low",
                        "medium" | "mid" => "medium",
+                        "xhigh" if row_lists_xhigh => "xhigh",
                        "max" | "xhigh" | "highest" => "max",
                        _ => "high",
                    };
@@ -797,7 +810,18 @@ fn anthropic_tool_choice(tool_choice: &Value, model: &str) -> Value {
        Some("none") => json!({ "type": "none" }),
        Some("any" | "required") => json!({ "type": "any" }),
        Some(name) => json!({ "type": "tool", "name": to_api_tool_name(name) }),
-        None => tool_choice.clone(),
+        None => match forced_tool_name(tool_choice) {
+            Some(name) => {
+                let mut choice = tool_choice.clone();
+                choice["type"] = json!("tool");
+                choice["name"] = json!(to_api_tool_name(name));
+                if let Some(object) = choice.as_object_mut() {
+                    object.remove("function");
+                }
+                choice
+            }
+            None => tool_choice.clone(),
+        },
    }
 }

@@ -1489,6 +1513,94 @@ mod tests {
        CodewhaleClient::new(&config).expect("Model Studio Messages client constructs")
    }

+    #[test]
+    fn dotted_tool_names_stay_inside_the_anthropic_pattern_and_decode_back() {
+        let client = test_client();
+        let mut request = request_with("claude-sonnet-4-6", None, None, None);
+        let tool = |name: &str| Tool {
+            tool_type: None,
+            name: name.to_string(),
+            description: "d".to_string(),
+            input_schema: json!({"type": "object", "additionalProperties": false}),
+            allowed_callers: None,
+            defer_loading: None,
+            input_examples: None,
+            strict: None,
+            cache_control: None,
+        };
+        request.tools = Some(vec![tool("read_file"), tool("web.run")]);
+        request.tool_choice = Some(json!({"type": "tool", "name": "web.run"}));
+        request.messages.push(Message {
+            role: Role::Assistant,
+            content: vec![ContentBlock::ToolUse {
+                execution_id: None,
+                id: "toolu_w".to_string(),
+                name: "web.run".to_string(),
+                input: json!({}),
+                caller: None,
+                thought_signature: None,
+            }],
+        });
+
+        let body = client.build_anthropic_body(&request, true);
+        let valid = |name: &str| {
+            (1..=128).contains(&name.len())
+                && name
+                    .chars()
+                    .all(|c| c.is_ascii_alphanumeric() || c == '_' || c == '-')
+        };
+        let mut sent = Vec::new();
+        for tool in body["tools"].as_array().expect("tools") {
+            sent.push(tool["name"].as_str().expect("tool name").to_string());
+        }
+        sent.push(
+            body.pointer("/tool_choice/name")
+                .and_then(Value::as_str)
+                .expect("forced tool name")
+                .to_string(),
+        );
+        for message in body["messages"].as_array().expect("messages") {
+            for block in message["content"].as_array().into_iter().flatten() {
+                if block["type"] == "tool_use" {
+                    sent.push(block["name"].as_str().expect("tool_use name").to_string());
+                }
+            }
+        }
+        assert!(sent.iter().all(|name| valid(name)), "{sent:?}");
+        assert!(sent.iter().any(|name| name != "read_file"), "{sent:?}");
+
+        let wire = to_api_tool_name("web.run");
+        let message = decode_anthropic_message(json!({
+            "id": "m", "type": "message", "role": "assistant",
+            "model": "claude-sonnet-4-6", "stop_reason": "tool_use",
+            "content": [{"type": "tool_use", "id": "toolu_w", "name": wire, "input": {}}],
+            "usage": {"input_tokens": 1, "output_tokens": 1},
+        }))
+        .unwrap();
+        let ContentBlock::ToolUse { name, .. } = &message.content[0] else {
+            panic!("expected tool_use")
+        };
+        assert_eq!(name, "web.run");
+
+        let event = convert_anthropic_sse_data(
+            &json!({
+                "type": "content_block_start", "index": 0,
+                "content_block": {"type": "tool_use", "id": "toolu_w", "name": wire, "input": {}},
+            })
+            .to_string(),
+        )
+        .unwrap()
+        .unwrap();
+        let StreamEvent::ContentBlockStart {
+            content_block: codewhale_models::ContentBlockStart::ToolUse { name, .. },
+            ..
+        } = event
+        else {
+            panic!("expected tool_use start")
+        };
+        assert_eq!(name, "web.run");
+    }
+
    #[test]
    fn body_keeps_native_cache_control_on_system_and_tools() {
        let client = test_client();
@@ -1559,6 +1671,36 @@ mod tests {
            Some("max")
        );

+        let offering = |model: &str| {
+            client
+                .catalog_facts_for_model(model)
+                .unwrap_or_else(|| panic!("bundled catalog carries {model}"))
+        };
+        let mut xhigh_client = test_client();
+        xhigh_client.route_facts = Some(offering("claude-opus-4-8"));
+        let body = xhigh_client.build_anthropic_body(
+            &request_with("claude-opus-4-8", Some("xhigh"), None, None),
+            true,
+        );
+        assert_eq!(
+            body.pointer("/output_config/effort")
+                .and_then(Value::as_str),
+            Some("xhigh"),
+            "a row that lists xhigh is sent xhigh: {body}"
+        );
+        let mut no_xhigh_client = test_client();
+        no_xhigh_client.route_facts = Some(offering("claude-sonnet-4-6"));
+        let body = no_xhigh_client.build_anthropic_body(
+            &request_with("claude-sonnet-4-6", Some("xhigh"), None, None),
+            true,
+        );
+        assert_eq!(
+            body.pointer("/output_config/effort")
+                .and_then(Value::as_str),
+            Some("max"),
+            "a row without xhigh keeps the max mapping: {body}"
+        );
+
        let body = client.build_anthropic_body(
            &request_with("claude-sonnet-4-6", Some("off"), None, None),
            true,
@@ -1800,6 +1942,18 @@ mod tests {
            Some("disabled"),
            "{body}"
        );
+
+        let mut preview_client = modelstudio_test_client(
+            "https://token-plan.ap-southeast-1.maas.aliyuncs.com/apps/anthropic",
+        );
+        preview_client.route_facts = preview_client.catalog_facts_for_model("qwen4-max-preview");
+        for effort in [None, Some("high"), Some("max"), Some("off")] {
+            let mut request = request_with("qwen4-max-preview", effort, None, None);
+            request.max_tokens = 64_000;
+            let body = preview_client.build_anthropic_body(&request, true);
+            assert!(body.get("thinking").is_none(), "{effort:?}: {body}");
+            assert!(body.get("output_config").is_none(), "{effort:?}: {body}");
+        }
    }

    #[test]
@@ -5443,6 +5443,7 @@ mod alias_thinking_detection_tests {
            "foo-reasoner",
            "new-model-reasoning",
            "acme-reasoner-v2",
+            "qwen4-max-preview",
        ] {
            assert!(
                !should_replay_reasoning_content_for_provider_on_route(
@@ -41,6 +41,60 @@ pub trait CommandCatalog: Send + Sync {
    fn answers_to(&self, name: &str) -> bool;
    fn builtins(&self) -> Vec<BuiltinCommand>;
    fn user_commands(&self, workspace: &Path) -> Vec<UserCommand>;
+    /// Whether this host executes `name` remotely at all. Checked before any
+    /// thread state is assembled, so a name outside the remote surface is
+    /// refused exactly like a name no host knows. `false` is the default: a
+    /// host opts in one command at a time, and widening this must widen
+    /// [`Self::execute_builtin`] too.
+    fn serves_builtin(&self, name: &str) -> bool {
+        let _ = name;
+        false
+    }
+    /// Execute one built-in command against a host snapshot. `None` means
+    /// this host does not implement remote execution, or does not answer to
+    /// the name; `Some` carries the command's own answer.
+    fn execute_builtin(
+        &self,
+        name: &str,
+        args: Option<&str>,
+        host: &BuiltinCommandHostSnapshot,
+    ) -> Option<BuiltinCommandExecution> {
+        let _ = (name, args, host);
+        None
+    }
+}
+
+/// The thread state a remote built-in execution reads.
+///
+/// Engine-side so the app-server can assemble it from thread state and the
+/// terminal host can interpret it without either depending on the other. The
+/// projections are the command contract's own data-only types: the host maps
+/// them into the facet envelope, and the capability mask each portable
+/// handler declares decides which commands this snapshot can honestly serve.
+pub struct BuiltinCommandHostSnapshot {
+    pub mode: codewhale_command_contract::types::CommandMode,
+    /// The host's own label for `mode` ("WORK", "PLAN"), the same string the
+    /// terminal footer shows.
+    pub mode_label: String,
+    pub locale: codewhale_localization::Locale,
+    pub model: String,
+    pub system_prompt: codewhale_command_contract::facets::DebugSystemPrompt,
+    /// Published usage telemetry and the host's cost breakdown for the
+    /// thread — the complete data source the portable `/tokens` and `/cost`
+    /// renderers consume.
+    pub tokens: codewhale_command_contract::facets::DebugTokenProjection,
+}
+
+/// One remote built-in execution's outcome.
+pub struct BuiltinCommandExecution {
+    pub name: String,
+    pub text: String,
+    pub is_error: bool,
+    /// `false` when the command also asked the terminal host for an action —
+    /// the text is still what the command answered, but no API client can
+    /// perform that action (a balance fetch, a snapshot restore) on the
+    /// host's behalf.
+    pub text_only: bool,
 }

 static CATALOG: OnceLock<Arc<dyn CommandCatalog>> = OnceLock::new();
@@ -863,6 +863,38 @@ mod tests {
        TurnAuthority::from_effective_fields(mode, true, false, auto_approve, approval_mode)
    }

+    #[test]
+    fn a_managed_network_grant_survives_the_ask_posture_and_shares_the_network() {
+        let workspace = Path::new("/srv/workspace");
+        for approval_mode in [ApprovalMode::Suggest, ApprovalMode::Bypass] {
+            let policy = sandbox_policy_for_turn(
+                AppMode::Agent,
+                approval_mode,
+                Some("workspace-write"),
+                workspace,
+                SandboxNetworkAccess::from_config(Some(true)),
+            );
+            assert!(
+                matches!(
+                    policy,
+                    SandboxPolicy::WorkspaceWrite {
+                        network_access: true,
+                        ..
+                    }
+                ),
+                "{approval_mode:?}: {policy:?}"
+            );
+        }
+        let unset = sandbox_policy_for_turn(
+            AppMode::Agent,
+            ApprovalMode::Suggest,
+            Some("workspace-write"),
+            workspace,
+            SandboxNetworkAccess::from_config(None),
+        );
+        assert!(!unset.has_network_access(), "{unset:?}");
+    }
+
    #[test]
    fn write_carve_out_posture_is_exactly_accept_edits() {
        assert!(write_carve_out_posture(
@@ -566,6 +566,7 @@ pub struct EngineConfig {
    /// When true and `/usr/bin/bwrap` is executable on Linux, route exec_shell
    /// through bubblewrap (#2184).
    pub prefer_bwrap: bool,
+    pub tool_launcher: Option<Vec<String>>,
    /// User-configured bwrap mount extensions (#5410): extra read-only roots
    /// and writable device nodes such as `/dev/null`.
    pub bwrap_extensions: codewhale_sandbox::BwrapMountExtensions,
@@ -700,6 +701,7 @@ impl Default for EngineConfig {
            goal_max_steps: None,
            // Mirrors `Config::prefers_bwrap`: on unless explicitly opted out.
            prefer_bwrap: true,
+            tool_launcher: None,
            bwrap_extensions: codewhale_sandbox::BwrapMountExtensions::default(),
            // Fail-closed (F7): `Engine::new` unconditionally installs this
            // list process-wide via `read_guard::set_active`, so a default
@@ -2541,12 +2543,14 @@ impl Engine {
            match shell_manager.lock() {
                Ok(mut manager) => {
                    manager.set_prefer_bwrap(config.prefer_bwrap);
+                    manager.set_tool_launcher(config.tool_launcher.clone());
                    manager.set_bwrap_extensions(config.bwrap_extensions.clone());
                    manager.set_denied_read_subpaths(config.read_denylist.subtree_paths());
                }
                Err(poisoned) => {
                    let mut manager = poisoned.into_inner();
                    manager.set_prefer_bwrap(config.prefer_bwrap);
+                    manager.set_tool_launcher(config.tool_launcher.clone());
                    manager.set_bwrap_extensions(config.bwrap_extensions.clone());
                    manager.set_denied_read_subpaths(config.read_denylist.subtree_paths());
                }
@@ -6242,7 +6246,9 @@ impl Engine {
            };
        }
        if self.is_acp_turn() {
-            return self.acp_tool_build(input_policy, &route, allowed_tools);
+            return self
+                .acp_turn_tool_build(input_policy, &route, allowed_tools, mcp_access)
+                .await;
        }
        if self.rlm_host.is_some() {
            return self.rlm_tool_build(input_policy, &route);
@@ -40,11 +40,61 @@ impl Engine {
        self.host_profile.is_acp() || self.turn_narrowing.is_acp()
    }

+    pub(super) async fn acp_turn_tool_build(
+        &mut self,
+        authority: &TurnAuthority,
+        route: &TurnRouteContext,
+        allowed: Option<Vec<String>>,
+        mcp_access: McpAccess,
+    ) -> TurnToolBuild {
+        if let Some(attachment) = self
+            .extension_host
+            .as_ref()
+            .filter(|_| self.config.features.enabled(Feature::ExtensionHost))
+        {
+            if attachment.selection_settled() {
+                attachment.sync_in_background();
+            } else {
+                attachment.sync_within(EXTENSION_FIRST_SYNC_WAIT).await;
+            }
+        }
+        let mcp = if self.config.features.enabled(Feature::Mcp) {
+            if mcp_access.may_connect() {
+                self.wait_for_mcp_boot().await;
+                let tools = self.mcp_tools().await;
+                let server_count = match self.mcp_pool.as_ref() {
+                    Some(pool) => pool.lock().await.connected_servers().len(),
+                    None => 0,
+                };
+                McpToolState::Live {
+                    tools,
+                    server_count,
+                }
+            } else {
+                self.passive_mcp_snapshot().await
+            }
+        } else {
+            McpToolState::Disabled
+        };
+        self.acp_tool_build_with_mcp(authority, route, allowed, mcp)
+    }
+
+    #[cfg(test)]
    pub(super) fn acp_tool_build(
        &self,
        authority: &TurnAuthority,
        route: &TurnRouteContext,
        allowed: Option<Vec<String>>,
+    ) -> TurnToolBuild {
+        self.acp_tool_build_with_mcp(authority, route, allowed, McpToolState::Disabled)
+    }
+
+    pub(super) fn acp_tool_build_with_mcp(
+        &self,
+        authority: &TurnAuthority,
+        route: &TurnRouteContext,
+        allowed: Option<Vec<String>>,
+        mcp: McpToolState,
    ) -> TurnToolBuild {
        let mut context = self.build_tool_context_for_turn(authority, route);
        let requested = self
@@ -85,6 +135,13 @@ impl Engine {
            builder = builder.with_foreground_shell_tools();
        }
        let mut registry = builder.build(context);
+        let extension_host = self
+            .extension_host
+            .as_ref()
+            .filter(|_| self.config.features.enabled(Feature::ExtensionHost));
+        if let Some(attachment) = extension_host {
+            attachment.manager().note_native_names(registry.names());
+        }
        if let Some(overrides) = self
            .api_config
            .tools
@@ -95,15 +152,28 @@ impl Engine {
                remove_acp_overridden_builtin(&mut registry, name);
            }
        }
+        let plugin_tool_names: HashSet<String> = extension_host
+            .map(|attachment| attachment.install_tools(&mut registry))
+            .unwrap_or_default()
+            .into_iter()
+            .collect();
+        let mut mcp_tools = if self.child_host.is_none() {
+            mcp.tools().to_vec()
+        } else {
+            Vec::new()
+        };
+        mcp_tools.sort_by(|a, b| a.name.cmp(&b.name));
+        let mcp_tool_names: Vec<String> = mcp_tools.iter().map(|tool| tool.name.clone()).collect();
        let allowed = Some(
            registry
                .names()
                .into_iter()
-                .filter(|name| tool_catalog::tool_allowed(allowed.as_deref(), name))
                .map(str::to_string)
+                .chain(mcp_tool_names.iter().cloned())
+                .filter(|name| tool_catalog::tool_allowed(allowed.as_deref(), name))
                .collect(),
        );
-        let catalog = self.child_host.as_ref().map_or_else(
+        let mut catalog = self.child_host.as_ref().map_or_else(
            || registry.to_api_tools_with_cache(true),
            |child| {
                child
@@ -111,6 +181,15 @@ impl Engine {
                    .tools_for_model(&registry, &child.authority.agent_type)
            },
        );
+        for tool in &mut catalog {
+            if plugin_tool_names.contains(&tool.name) {
+                tool.defer_loading = Some(false);
+            }
+        }
+        catalog.extend(mcp_tools.into_iter().map(|mut tool| {
+            tool.defer_loading = Some(false);
+            tool
+        }));
        let always_load = catalog.iter().map(|tool| tool.name.clone()).collect();
        TurnToolBuild {
            surface: ToolSurfacePolicy::new(
@@ -125,11 +204,11 @@ impl Engine {
                self.config.max_tool_calls,
                tool_catalog::ToolMode::Direct,
            ),
-            mcp_tool_names: Vec::new(),
-            mcp: McpToolState::Disabled,
+            mcp_tool_names,
+            mcp,
            subagent_runtime_model: None,
            mailbox: None,
-            plugin_tool_names: HashSet::new(),
+            plugin_tool_names,
        }
    }
 }
@@ -179,6 +179,49 @@ async fn child_ceiling_filters_acp_foreground_catalog_without_optional_allow_lis
    assert!(!dir.path().join("blocked.txt").exists());
 }

+#[tokio::test(flavor = "current_thread")]
+async fn child_engine_gets_no_mcp_tools_from_the_acp_tool_build() {
+    let dir = tempdir().unwrap();
+    let _home = crate::test_support::SealedHome::at(dir.path());
+    let (child, _handle, _authority, route) = fixture(dir.path(), None);
+    let (mut root, _root_handle) = Engine::new(
+        EngineConfig {
+            workspace: dir.path().into(),
+            snapshots_enabled: false,
+            memory_enabled: false,
+            ..Default::default()
+        },
+        &route.api_config,
+    );
+    root.host_profile = EngineHostProfile::Acp;
+    let authority =
+        TurnAuthority::from_effective_fields(AppMode::Agent, true, false, true, ApprovalMode::Auto);
+    let live = || McpToolState::Live {
+        tools: vec![api_tool("mcp_fixture_echo")],
+        server_count: 1,
+    };
+    let offered = root.acp_tool_build_with_mcp(&authority, &route, None, live());
+    assert_eq!(offered.mcp_tool_names, ["mcp_fixture_echo"]);
+    assert!(
+        offered
+            .surface
+            .catalog
+            .iter()
+            .any(|tool| tool.name == "mcp_fixture_echo")
+    );
+    assert!(offered.surface.passes_allow_list("mcp_fixture_echo"));
+    let build = child.acp_tool_build_with_mcp(&authority, &route, None, live());
+    assert!(build.mcp_tool_names.is_empty());
+    assert!(
+        !build
+            .surface
+            .catalog
+            .iter()
+            .any(|tool| tool.name == "mcp_fixture_echo")
+    );
+    assert!(!build.surface.passes_allow_list("mcp_fixture_echo"));
+}
+
 #[tokio::test(flavor = "current_thread")]
 async fn child_registry_rejects_context_override_identity_before_tool_effect() {
    let dir = tempdir().unwrap();
@@ -742,7 +742,10 @@ impl Engine {
            if let Some(context) = context
                && (context.acp_host.is_some() || context.child_host.is_some())
            {
-                if context.acp_host.is_some() || tool_name != EXECUTE_TOOLS_TOOL_NAME {
+                let acp_mcp_call = context.acp_host.is_some() && McpPool::is_mcp_tool(&tool_name);
+                if !acp_mcp_call
+                    && (context.acp_host.is_some() || tool_name != EXECUTE_TOOLS_TOOL_NAME)
+                {
                    let spec = registry
                        .and_then(|registry| registry.get(&tool_name))
                        .ok_or_else(|| {
@@ -2044,7 +2044,11 @@ impl Engine {
                )));
            }

-            if blocked_error.is_none() && self.is_acp_turn() && !registry_has_spec {
+            if blocked_error.is_none()
+                && self.is_acp_turn()
+                && !registry_has_spec
+                && !McpPool::is_mcp_tool(&tool_name)
+            {
                blocked_error = Some(ToolError::not_available(format!(
                    "{tool_name} is outside the ACP foreground tool profile"
                )));
@@ -1,11 +1,12 @@
 //! Stable diagnostics translation keys mapped to the existing catalog.
-//! This host-only bridge does not introduce new copy or infer provider prices.
+//! This bridge does not introduce new copy or infer provider prices.

-use codewhale_localization::MessageId;
+use codewhale_command_contract::facets::CommandPresentationContext;
+use codewhale_localization::{Locale, MessageId, tr};

-pub(super) fn resolve(key: &str) -> Option<MessageId> {
+pub fn resolve(key: &str) -> Option<MessageId> {
    if let Some(reason) = key.strip_prefix("cost_reason_") {
-        return Some(codewhale_engine::pricing::UnpricedReason::from_label(reason).message_id());
+        return Some(crate::pricing::UnpricedReason::from_label(reason).message_id());
    }
    Some(match key {
        "cmd_diff_git_unavailable" => MessageId::CmdDiffGitUnavailable,
@@ -83,3 +84,50 @@ pub(super) fn resolve(key: &str) -> Option<MessageId> {
        _ => return None,
    })
 }
+
+pub fn apply_named_replacements(template: &str, replacements: &[(&str, &str)]) -> Option<String> {
+    let supplied: std::collections::BTreeMap<&str, &str> = replacements.iter().copied().collect();
+    if supplied.len() != replacements.len() {
+        return None;
+    }
+    let mut placeholders = std::collections::BTreeSet::new();
+    let mut cursor = 0usize;
+    while let Some(start) = template[cursor..].find('{') {
+        let start = cursor + start;
+        let Some(end) = template[start + 1..].find('}') else {
+            break;
+        };
+        let end = start + 1 + end;
+        let name = &template[start + 1..end];
+        if !name.is_empty() {
+            placeholders.insert(name);
+        }
+        cursor = end + 1;
+    }
+    if placeholders != supplied.keys().copied().collect() {
+        return None;
+    }
+    let placeholders: Vec<_> = replacements
+        .iter()
+        .map(|(name, _)| format!("{{{name}}}"))
+        .collect();
+    let replacements: Vec<_> = placeholders
+        .iter()
+        .zip(replacements)
+        .map(|(placeholder, (_, value))| (placeholder.as_str(), *value))
+        .collect();
+    Some(codewhale_protocol::display::interpolate(
+        template,
+        &replacements,
+    ))
+}
+
+pub struct EnglishDiagnostics;
+
+impl CommandPresentationContext for EnglishDiagnostics {
+    fn translate(&self, key: &str, replacements: &[(&str, &str)]) -> Result<String, String> {
+        let message_id = resolve(key).ok_or_else(|| "unknown translation key".to_string())?;
+        apply_named_replacements(&tr(Locale::En, message_id), replacements)
+            .ok_or_else(|| "invalid translation replacement contract".to_string())
+    }
+}
@@ -43,7 +43,8 @@
 //! Full Access still opens their card. Auto-Review and Never refuse them
 //! (`resolve_approval_request_disposition`); explicit denials always win.
 //!
-//! **Caps.** Per invocation: 50 `core/call`s in all (the ticket's uses), 4 at
+//! **Caps.** Per invocation: 50 core tool calls in all, counted together
+//! across `core/call` and the nested calls of broker arms, 4 at
 //! once (code mode's own cap), and one approval card at a time (the turn
 //! loop serves one request at a time). Per host: the channel's 256 in-flight
 //! host requests. A burst of invalid tickets ends the host (`ticket`).
@@ -67,6 +68,7 @@
 //!   tool's `core/call`s run beside it, not through the lock.

 use std::collections::HashMap;
+use std::sync::atomic::{AtomicU32, Ordering};
 use std::sync::{Arc, Mutex};
 use std::time::Duration;

@@ -75,9 +77,10 @@ use serde_json::{Value, json};
 use tokio_util::sync::CancellationToken;

 use super::ManagerShared;
+use super::dsh_broker::{self, Arm, BrokerCall, BrokerRefusal};
 use super::protocol::{
-    ContentBlockWire, CoreCallParams, RpcErrorWire, SessionCheckpointParams, ToolResultWire,
-    UserQuestionParams, error_code,
+    ContentBlockWire, CoreCallParams, DshBrokerParams, DshBrokerTicketWire, DshService,
+    RpcErrorWire, SessionCheckpointParams, ToolResultWire, UserQuestionParams, error_code,
 };
 use super::supervisor::HostRequestContext;
 use super::ticket::{Grant, Presented, Ticket, TicketKind};
@@ -100,6 +103,7 @@ pub const MAX_CALLS_PER_INVOCATION: u32 = 50;
 /// A backstop only: an invocation ends (and revokes its ticket) long before
 /// this, and its own deadline pauses while a person decides.
 const TICKET_TTL: Duration = Duration::from_secs(24 * 60 * 60);
+const GRANT_PROBE: Duration = Duration::from_millis(50);
 /// Receipts attached to an extension tool's result metadata.
 pub const RECEIPTS_ATTACHED: usize = 50;

@@ -263,6 +267,8 @@ pub struct Invocation {
    calls: CodemodeInvoker,
    gate: NestedCallGate,
    root_caller: Option<SessionCheckpointCaller>,
+    broker: Option<BrokerScope>,
+    nested_calls: AtomicU32,
    tickets: Vec<Ticket>,
    caller_tools: Vec<String>,
    activations: Mutex<
@@ -280,6 +286,98 @@ pub struct Invocation {
    cancel: CancellationToken,
 }

+struct BrokerScope {
+    session_id: String,
+    context: Arc<ToolContext>,
+}
+
+pub struct BrokerContext {
+    invocation: Arc<Invocation>,
+    tool: Arc<ToolContext>,
+    service: DshService,
+    cancel: CancellationToken,
+}
+
+impl BrokerContext {
+    #[must_use]
+    pub fn tool(&self) -> &ToolContext {
+        &self.tool
+    }
+
+    #[must_use]
+    pub fn cancel(&self) -> &CancellationToken {
+        &self.cancel
+    }
+
+    pub async fn core_call(
+        &self,
+        name: &str,
+        input: Value,
+    ) -> Result<ToolCallResponse, BrokerRefusal> {
+        if self.cancel.is_cancelled() {
+            return Err(BrokerRefusal::nested(
+                self.service,
+                NestedFailure::Unavailable("the broker call was withdrawn".to_string()),
+            ));
+        }
+        if self.invocation.nested_calls.fetch_add(1, Ordering::SeqCst) >= MAX_CALLS_PER_INVOCATION {
+            return Err(BrokerRefusal::nested(
+                self.service,
+                NestedFailure::Rejected {
+                    decision: NestedDecision::Refused,
+                    message: format!(
+                        "a tool call may make at most {MAX_CALLS_PER_INVOCATION} core tool calls"
+                    ),
+                },
+            ));
+        }
+        self.invocation
+            .calls
+            .call(name.to_string(), input, Some(&self.cancel))
+            .await
+            .map_err(|failure| BrokerRefusal::nested(self.service, failure))
+    }
+}
+
+#[cfg(test)]
+impl BrokerContext {
+    pub fn detached_for_test(owner: &OwnerRef, service: DshService) -> Self {
+        let tool = ToolContext::new(std::path::PathBuf::from("."));
+        let gate = NestedCallGate::admitting_for_test();
+        let calls = CodemodeInvoker::for_extension(
+            Vec::new(),
+            tool.clone(),
+            gate.clone(),
+            String::new(),
+            |_, _, _| None,
+        );
+        let invocation = Arc::new(Invocation {
+            tier: HostTier::Plugin,
+            host_generation: 0,
+            owner: owner.clone(),
+            scope: None,
+            plugins: None,
+            content_hash: String::new(),
+            calls,
+            gate,
+            root_caller: None,
+            broker: None,
+            nested_calls: AtomicU32::new(0),
+            tickets: Vec::new(),
+            caller_tools: Vec::new(),
+            activations: Mutex::new(HashMap::new()),
+            session_call_lock: tokio::sync::Mutex::new(()),
+            cancel: CancellationToken::new(),
+        });
+        Self {
+            invocation,
+            tool: Arc::new(tool),
+            service,
+            cancel: CancellationToken::new(),
+        }
+    }
+}
+
 /// The tickets and invocations of one manager.
 #[derive(Default)]
 pub struct CoreCalls {
@@ -313,6 +411,7 @@ impl CoreCalls {
            gate,
            None,
            String::new(),
+            &dsh_broker::test_grants().unwrap_or_default(),
        )
    }
    #[allow(clippy::too_many_arguments)]
@@ -327,6 +426,7 @@ impl CoreCalls {
        gate: &NestedCallGate,
        scope: Option<codewhale_config::EntryRef>,
        content_hash: String,
+        broker_services: &[DshService],
    ) -> Option<InvocationGuard> {
        let (caller, specs) = gate.extension()?;
        if caller != expected {
@@ -405,6 +505,45 @@ impl CoreCalls {
                uses: MAX_CALLS_PER_INVOCATION,
            })
        });
+        let broker_session = context
+            .execution
+            .session_objects
+            .as_ref()
+            .map(|session| session.session_id.clone())
+            .filter(|id| !id.is_empty());
+        let broker_tickets: Vec<(DshService, Ticket)> = broker_session
+            .iter()
+            .flat_map(|session| {
+                DshService::ALL
+                    .into_iter()
+                    .filter(|service| tier == HostTier::Plugin && broker_services.contains(service))
+                    .map(move |service| {
+                        (
+                            service,
+                            self.tickets.mint(Grant {
+                                kind: TicketKind::Invocation,
+                                tier,
+                                host_generation,
+                                owner: owner.clone(),
+                                method: dsh_broker::ticket_method(service),
+                                target: json!({ "call_id": call_id, "session_id": session }),
+                                ttl: TICKET_TTL,
+                                uses: MAX_CALLS_PER_INVOCATION,
+                            }),
+                        )
+                    })
+            })
+            .collect();
+        let broker = broker_session
+            .filter(|_| !broker_tickets.is_empty())
+            .map(|session_id| {
+                let mut context = context.clone();
+                context.execution.nested_call_gate = None;
+                BrokerScope {
+                    session_id,
+                    context: Arc::new(context),
+                }
+            });
        let caller_tools = specs
            .iter()
            .map(|spec| spec.name().to_string())
@@ -425,10 +564,13 @@ impl CoreCalls {
            calls,
            gate: gate.clone(),
            root_caller,
+            broker,
+            nested_calls: AtomicU32::new(0),
            tickets: std::iter::once(ticket.clone())
                .chain(checkpoint_ticket.iter().cloned())
                .chain(question_ticket.iter().cloned())
                .chain(subagent_ticket.iter().cloned())
+                .chain(broker_tickets.iter().map(|(_, ticket)| ticket.clone()))
                .collect(),
            caller_tools,
            activations: Mutex::new(HashMap::new()),
@@ -457,7 +599,14 @@ impl CoreCalls {
                Arc::clone(&invocation),
            );
        }
+        for (_, broker_ticket) in &broker_tickets {
+            self.invocations
+                .lock()
+                .expect("invocations lock")
+                .insert(broker_ticket.expose().to_string(), Arc::clone(&invocation));
+        }
        Some(InvocationGuard {
+            broker_tickets,
            question_ticket,
            subagent_ticket,
            checkpoint_ticket,
@@ -553,10 +702,30 @@ impl CoreCalls {
        method: &str,
        cx: &HostRequestContext,
    ) -> Result<Arc<Invocation>, RpcErrorWire> {
-        let refuse = |code, message| RpcErrorWire {
-            code,
-            message,
-            data: None,
+        self.redeem_invocation_or_limit(shared, tier, host_generation, owner, ticket, method, cx)
+            .map_err(|(_, error)| error)
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    fn redeem_invocation_or_limit(
+        &self,
+        shared: &ManagerShared,
+        tier: HostTier,
+        host_generation: u64,
+        owner: &OwnerRef,
+        ticket: &str,
+        method: &str,
+        cx: &HostRequestContext,
+    ) -> Result<Arc<Invocation>, (bool, RpcErrorWire)> {
+        let refuse = |code, message| {
+            (
+                false,
+                RpcErrorWire {
+                    code,
+                    message,
+                    data: None,
+                },
+            )
        };
        let redeemed = self.tickets.redeem(&Presented {
            ticket,
@@ -573,10 +742,8 @@ impl CoreCalls {
                    "too many invalid {method} tickets from one host process"
                ));
            }
-            return Err(refuse(
-                error_code::REFUSED,
-                refused.reason.describe().to_string(),
-            ));
+            let (_, error) = refuse(error_code::REFUSED, refused.reason.describe().to_string());
+            return Err((refused.reason == super::ticket::Refusal::Exhausted, error));
        }
        // The redemption proved the ticket is live and ours; the owner must
        // still be the current one of this tier.
@@ -1063,6 +1230,137 @@ impl CoreCalls {
        result
    }

+    pub async fn serve_broker(
+        &self,
+        shared: &ManagerShared,
+        tier: HostTier,
+        host_generation: u64,
+        params: DshBrokerParams,
+        cx: HostRequestContext,
+    ) -> Result<Value, RpcErrorWire> {
+        self.serve_broker_in(dsh_broker::TABLE, shared, tier, host_generation, params, cx)
+            .await
+    }
+
+    pub(super) async fn serve_broker_in(
+        &self,
+        table: &[(DshService, Arm)],
+        shared: &ManagerShared,
+        tier: HostTier,
+        host_generation: u64,
+        params: DshBrokerParams,
+        cx: HostRequestContext,
+    ) -> Result<Value, RpcErrorWire> {
+        let refused = |message: String| {
+            dsh_broker::coded(
+                RpcErrorWire {
+                    code: error_code::REFUSED,
+                    message,
+                    data: None,
+                },
+                dsh_broker::TICKET_REFUSED,
+            )
+        };
+        let cancelled = |message: &str| {
+            dsh_broker::coded(
+                RpcErrorWire {
+                    code: error_code::CANCELLED,
+                    message: message.to_string(),
+                    data: None,
+                },
+                dsh_broker::CANCELLED,
+            )
+        };
+        let service = DshService::parse(&params.service)
+            .ok_or_else(|| BrokerRefusal::UnknownService(params.service.clone()).wire())?;
+        let invocation = self
+            .redeem_invocation_or_limit(
+                shared,
+                tier,
+                host_generation,
+                &params.owner,
+                &params.ticket,
+                dsh_broker::ticket_method(service),
+                &cx,
+            )
+            .map_err(|(limit, mut error)| {
+                if limit {
+                    error.message = format!(
+                        "this tool call's limit for the {} service is used up",
+                        service.name()
+                    );
+                    dsh_broker::coded(error, dsh_broker::LIMIT)
+                } else {
+                    dsh_broker::coded(error, dsh_broker::TICKET_REFUSED)
+                }
+            })?;
+        let (session_id, tool) = invocation
+            .broker
+            .as_ref()
+            .map(|scope| (scope.session_id.clone(), Arc::clone(&scope.context)))
+            .ok_or_else(|| refused("dsh/broker requires an invocation in a session".into()))?;
+        if !shared.broker_granted(&params.owner, service).await {
+            return Err(BrokerRefusal::NotGranted(service).wire());
+        }
+        let arm = dsh_broker::arm_in(table, service)
+            .ok_or_else(|| BrokerRefusal::NotAvailable(service).wire())?;
+        let withdraw = invocation.cancel.child_token();
+        let _withdraw_guard = withdraw.clone().drop_guard();
+        let call = BrokerCall {
+            owner: params.owner.clone(),
+            session_id,
+            service,
+            method: params.method,
+            input: params.input,
+            context: BrokerContext {
+                invocation: Arc::clone(&invocation),
+                tool,
+                service,
+                cancel: withdraw.clone(),
+            },
+        };
+        let withdrawn = async {
+            loop {
+                tokio::time::sleep(GRANT_PROBE).await;
+                if !shared.broker_granted(&params.owner, service).await {
+                    break;
+                }
+            }
+        };
+        let outcome = tokio::select! {
+            biased;
+            () = cx.cancel.cancelled() => return Err(cancelled("dsh/broker was cancelled by its host")),
+            () = withdraw.cancelled() => return Err(cancelled("dsh/broker invocation ended")),
+            () = withdrawn => return Err(BrokerRefusal::NotGranted(service).wire()),
+            outcome = arm(call) => outcome,
+        };
+        if shared
+            .registry
+            .lock()
+            .expect("registry lock")
+            .tier_of(&params.owner)
+            != Some(tier)
+        {
+            return Err(refused("dsh/broker owner is no longer current".into()));
+        }
+        shared
+            .check_selection(
+                invocation
+                    .plugins
+                    .as_ref()
+                    .and_then(|plugins| plugins.caller_selection()),
+                invocation.plugins.as_deref(),
+                &params.owner.plugin_id,
+                &invocation.content_hash,
+                invocation.scope.as_ref(),
+            )
+            .map_err(refused)?;
+        if !shared.broker_granted(&params.owner, service).await {
+            return Err(BrokerRefusal::NotGranted(service).wire());
+        }
+        outcome.map_err(BrokerRefusal::wire)
+    }
+
    /// Redeem `params` presented by `tier`'s host process `host_generation`
    /// and run the call. An invalid presentation is a refusal, and a burst of
    /// them a violation `cx` reports.
@@ -1088,6 +1386,12 @@ impl CoreCalls {
            METHOD,
            &cx,
        )?;
+        if invocation.nested_calls.fetch_add(1, Ordering::SeqCst) >= MAX_CALLS_PER_INVOCATION {
+            return Err(refuse(
+                error_code::REFUSED,
+                super::ticket::Refusal::Exhausted.describe().to_string(),
+            ));
+        }
        // Withdrawn when the host cancels this request, its owner is revoked,
        // the host exits (`cx.cancel`), or the invocation ends.
        let withdraw = invocation.cancel.child_token();
@@ -1191,6 +1495,7 @@ pub struct InvocationGuard {
    checkpoint_ticket: Option<Ticket>,
    question_ticket: Option<Ticket>,
    subagent_ticket: Option<Ticket>,
+    broker_tickets: Vec<(DshService, Ticket)>,
    invocation: Arc<Invocation>,
 }

@@ -1212,6 +1517,18 @@ impl InvocationGuard {
        self.subagent_ticket.as_ref().map(Ticket::expose)
    }

+    pub fn broker_tickets(&self) -> Option<Vec<DshBrokerTicketWire>> {
+        (!self.broker_tickets.is_empty()).then(|| {
+            self.broker_tickets
+                .iter()
+                .map(|(service, ticket)| DshBrokerTicketWire {
+                    service: service.name().to_string(),
+                    ticket: ticket.expose().to_string(),
+                })
+                .collect()
+        })
+    }
+
    pub fn caller_tools(&self) -> Option<Vec<String>> {
        self.subagent_ticket
            .as_ref()
@@ -0,0 +1,254 @@
+use std::future::Future;
+use std::pin::Pin;
+
+use codewhale_config::OwnerRef;
+use serde::de::DeserializeOwned;
+use serde_json::{Value, json};
+
+use super::protocol::{DshService, RpcErrorWire, error_code};
+use super::registry::OwnerRegistry;
+use super::{
+    dsh_catalog, dsh_llm, dsh_network, dsh_remote, dsh_settings, dsh_terminal, dsh_workspace,
+};
+use crate::tools::codemode::{NestedDecision, NestedFailure};
+
+pub use super::core_call::BrokerContext;
+
+pub struct BrokerCall {
+    pub owner: OwnerRef,
+    pub session_id: String,
+    pub service: DshService,
+    pub method: String,
+    pub input: Value,
+    pub context: BrokerContext,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum BrokerRefusal {
+    UnknownService(String),
+    UnknownMethod {
+        service: DshService,
+        method: String,
+    },
+    InvalidInput {
+        service: DshService,
+        message: String,
+    },
+    NotAvailable(DshService),
+    NotGranted(DshService),
+    Denied {
+        service: DshService,
+        message: String,
+    },
+    Refused {
+        service: DshService,
+        message: String,
+    },
+}
+
+impl BrokerRefusal {
+    #[must_use]
+    pub fn code(&self) -> &'static str {
+        match self {
+            Self::UnknownService(_) => "unknown_service",
+            Self::UnknownMethod { .. } => "unknown_method",
+            Self::InvalidInput { .. } => "invalid_input",
+            Self::NotAvailable(_) => "not_available",
+            Self::NotGranted(_) => "not_granted",
+            Self::Denied { .. } => "denied",
+            Self::Refused { .. } => "refused",
+        }
+    }
+
+    #[must_use]
+    pub fn wire(self) -> RpcErrorWire {
+        let code = self.code();
+        let (rpc, message, service) = match self {
+            Self::UnknownService(name) => (
+                error_code::INVALID_PARAMS,
+                "dsh/broker names a service the core does not broker".to_string(),
+                Value::String(name.chars().take(64).collect()),
+            ),
+            Self::UnknownMethod { service, method } => (
+                error_code::INVALID_PARAMS,
+                format!(
+                    "the {} broker has no method `{}`",
+                    service.name(),
+                    method.chars().take(64).collect::<String>()
+                ),
+                Value::String(service.name().into()),
+            ),
+            Self::InvalidInput { service, message } => (
+                error_code::INVALID_PARAMS,
+                format!("invalid {} broker input: {message}", service.name()),
+                Value::String(service.name().into()),
+            ),
+            Self::NotAvailable(service) => (
+                error_code::NOT_AVAILABLE,
+                format!("the {} broker is not available yet", service.name()),
+                Value::String(service.name().into()),
+            ),
+            Self::NotGranted(service) => (
+                error_code::REFUSED,
+                format!(
+                    "the {} service is not granted to this plugin",
+                    service.name()
+                ),
+                Value::String(service.name().into()),
+            ),
+            Self::Denied { service, message } => (
+                error_code::DENIED,
+                message,
+                Value::String(service.name().into()),
+            ),
+            Self::Refused { service, message } => (
+                error_code::REFUSED,
+                message,
+                Value::String(service.name().into()),
+            ),
+        };
+        RpcErrorWire {
+            code: rpc,
+            message,
+            data: Some(json!({ "dsh_refusal": code, "service": service })),
+        }
+    }
+
+    #[must_use]
+    pub fn nested(service: DshService, failure: NestedFailure) -> Self {
+        match failure {
+            NestedFailure::Rejected {
+                decision: NestedDecision::Denied,
+                message,
+            } => Self::Denied { service, message },
+            NestedFailure::Rejected { message, .. } | NestedFailure::Unavailable(message) => {
+                Self::Refused { service, message }
+            }
+        }
+    }
+}
+
+pub const TICKET_REFUSED: &str = "ticket_refused";
+pub const LIMIT: &str = "limit";
+pub const CANCELLED: &str = "cancelled";
+
+#[must_use]
+pub fn coded(mut error: RpcErrorWire, code: &str) -> RpcErrorWire {
+    error.data = Some(json!({ "dsh_refusal": code }));
+    error
+}
+
+pub type BrokerFuture = Pin<Box<dyn Future<Output = Result<Value, BrokerRefusal>> + Send>>;
+pub type Arm = fn(BrokerCall) -> BrokerFuture;
+
+pub const TABLE: &[(DshService, Arm)] = &[
+    (DshService::Workspace, dsh_workspace::serve as Arm),
+    (DshService::Llm, dsh_llm::serve as Arm),
+    (DshService::Network, dsh_network::serve as Arm),
+    (DshService::Settings, dsh_settings::serve as Arm),
+    (DshService::Catalog, dsh_catalog::serve as Arm),
+    (DshService::Terminal, dsh_terminal::serve as Arm),
+    (DshService::Remote, dsh_remote::serve as Arm),
+];
+
+#[cfg(test)]
+thread_local! {
+    static TEST_GRANTS: std::cell::RefCell<Option<Vec<DshService>>> =
+        const { std::cell::RefCell::new(None) };
+}
+
+#[cfg(test)]
+pub struct TestGrants(Option<Vec<DshService>>);
+
+#[cfg(test)]
+impl TestGrants {
+    pub fn only(services: &[DshService]) -> Self {
+        Self(TEST_GRANTS.with(|grants| grants.replace(Some(services.to_vec()))))
+    }
+}
+
+#[cfg(test)]
+impl Drop for TestGrants {
+    fn drop(&mut self) {
+        let previous = self.0.take();
+        TEST_GRANTS.with(|grants| *grants.borrow_mut() = previous);
+    }
+}
+
+#[cfg(test)]
+pub(super) fn test_grants() -> Option<Vec<DshService>> {
+    TEST_GRANTS.with(|grants| grants.borrow().clone())
+}
+
+#[cfg(not(test))]
+pub(super) fn test_grants() -> Option<Vec<DshService>> {
+    None
+}
+
+#[must_use]
+pub fn offered(service: DshService) -> bool {
+    use codewhale_plugins::host_services::HostService;
+    HostService::parse(service.name()).is_some_and(codewhale_plugins::host_services::offered)
+}
+
+#[must_use]
+pub fn granted(registry: &OwnerRegistry, owner: &OwnerRef, service: DshService) -> bool {
+    match test_grants() {
+        Some(granted) => granted.contains(&service),
+        None => offered(service) && registry.host_service_granted(owner, service),
+    }
+}
+
+#[must_use]
+pub fn granted_services(registry: &OwnerRegistry, owner: &OwnerRef) -> Vec<DshService> {
+    DshService::ALL
+        .into_iter()
+        .filter(|service| granted(registry, owner, *service))
+        .collect()
+}
+
+#[must_use]
+pub fn arm_in(table: &[(DshService, Arm)], service: DshService) -> Option<Arm> {
+    table
+        .iter()
+        .find(|(candidate, _)| *candidate == service)
+        .map(|(_, arm)| *arm)
+}
+
+#[must_use]
+pub fn ticket_method(service: DshService) -> &'static str {
+    match service {
+        DshService::Workspace => "dsh/broker:workspace",
+        DshService::Llm => "dsh/broker:llm",
+        DshService::Network => "dsh/broker:network",
+        DshService::Settings => "dsh/broker:settings",
+        DshService::Catalog => "dsh/broker:catalog",
+        DshService::Terminal => "dsh/broker:terminal",
+        DshService::Remote => "dsh/broker:remote",
+    }
+}
+
+pub trait BrokerMethods: DeserializeOwned {
+    const NAMES: &'static [&'static str];
+}
+
+pub fn decode<M: BrokerMethods>(call: &BrokerCall) -> Result<M, BrokerRefusal> {
+    if !M::NAMES.contains(&call.method.as_str()) {
+        return Err(BrokerRefusal::UnknownMethod {
+            service: call.service,
+            method: call.method.clone(),
+        });
+    }
+    serde_json::from_value(json!({ "method": call.method, "input": call.input })).map_err(|error| {
+        BrokerRefusal::InvalidInput {
+            service: call.service,
+            message: error.to_string(),
+        }
+    })
+}
+
+pub fn not_available(service: DshService) -> BrokerFuture {
+    Box::pin(std::future::ready(Err(BrokerRefusal::NotAvailable(
+        service,
+    ))))
+}
@@ -0,0 +1,6 @@
+use super::dsh_broker::{BrokerCall, BrokerFuture, not_available};
+use super::protocol::DshService;
+
+pub(super) fn serve(_call: BrokerCall) -> BrokerFuture {
+    not_available(DshService::Catalog)
+}
@@ -0,0 +1,904 @@
+use std::path::Path;
+use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::time::Duration;
+
+use serde_json::{Value, json};
+use tokio::sync::mpsc;
+
+use super::core_call::InvocationGuard;
+use super::dsh_broker::{Arm, BrokerCall, BrokerFuture, BrokerMethods, BrokerRefusal, decode};
+use super::protocol::{DshBrokerParams, DshService, HostRequest, RpcErrorWire, error_code};
+use super::supervisor::HostRequestContext;
+use super::tier::HostTier;
+use super::{ExtensionHostManager, ExtensionHostOptions};
+use crate::tools::codemode::{ExtensionCaller, NestedCallGate};
+use crate::tools::spec::ToolContext;
+use codewhale_config::OwnerRef;
+use codewhale_plugins::PluginRegistry;
+use codewhale_plugins::activation::TestPolicyGuard;
+use codewhale_plugins::discovery::{DiscoveryConfig, discover_with_config};
+use codewhale_plugins::host_services::{
+    AgentApproval, AgentPosture, HostService, PersonVia, PluginApprover, ReviewApproval, TestOffer,
+};
+
+const HOST: u64 = 7;
+
+struct Plugins {
+    _temp: tempfile::TempDir,
+    config: DiscoveryConfig,
+}
+
+impl Plugins {
+    fn new(plugins: &[(&str, &[&str])]) -> Self {
+        let temp = tempfile::tempdir().unwrap();
+        let root = temp.path();
+        let config = DiscoveryConfig {
+            workspace: root.join("project"),
+            user_plugins_dir: root.join("user"),
+            workspace_plugins_dir: root.join("workspace"),
+            builtin_plugin_dirs: Vec::new(),
+            state_path: root.join("state/plugin-state.json"),
+        };
+        std::fs::create_dir_all(&config.workspace).unwrap();
+        for (name, asks) in plugins {
+            let plugin = config.user_plugins_dir.join(name);
+            std::fs::create_dir_all(plugin.join("native")).unwrap();
+            std::fs::write(
+                plugin.join("native/index.mjs"),
+                "export function apply() {}\n",
+            )
+            .unwrap();
+            let asked = if asks.is_empty() {
+                String::new()
+            } else {
+                format!(
+                    "[capabilities]\nhost_services = [{}]\n",
+                    asks.iter()
+                        .map(|service| format!("{service:?}"))
+                        .collect::<Vec<_>>()
+                        .join(", ")
+                )
+            };
+            std::fs::write(
+                plugin.join("plugin.toml"),
+                format!(
+                    "schema_version = 1\n[plugin]\nname = {name:?}\nversion = \"1.0.0\"\n[native]\npath = \"native/index.mjs\"\n{asked}"
+                ),
+            )
+            .unwrap();
+        }
+        let plugins_fixture = Self {
+            _temp: temp,
+            config,
+        };
+        for (name, _) in plugins {
+            plugins_fixture.review(name, true);
+        }
+        plugins_fixture
+    }
+
+    fn registry(&self) -> PluginRegistry {
+        discover_with_config(&self.config)
+    }
+
+    fn review(&self, name: &str, showing_services: bool) {
+        let mut registry = self.registry();
+        let shown = registry
+            .host_service_review(name)
+            .filter(|_| showing_services)
+            .map(|review| review.token);
+        registry
+            .trust_reviewed(
+                name,
+                ReviewApproval {
+                    approved_by: PluginApprover::person(PersonVia::Terminal),
+                    host_services: shown,
+                },
+            )
+            .unwrap();
+        registry.enable(name).unwrap();
+    }
+
+    fn review_by_agent(&self, name: &str) {
+        self.registry().revoke_trust(name).unwrap();
+        let mut registry = self.registry();
+        let approver = PluginApprover::Agent(AgentApproval {
+            posture: AgentPosture::FullAccess,
+            workspace: self.config.workspace.to_string_lossy().into_owned(),
+            thread_id: Some("thread".into()),
+            turn_id: Some("turn".into()),
+            tool_call_id: Some("call".into()),
+        });
+        let shown = registry
+            .host_service_review_for(name, &approver)
+            .map(|review| review.token);
+        registry
+            .trust_reviewed(
+                name,
+                ReviewApproval {
+                    approved_by: approver.clone(),
+                    host_services: shown,
+                },
+            )
+            .unwrap();
+        registry.enable_by(name, approver).unwrap();
+    }
+}
+
+struct Host {
+    manager: ExtensionHostManager,
+    context: ToolContext,
+    gate: NestedCallGate,
+}
+
+fn host(workspace: &Path) -> Host {
+    let manager = ExtensionHostManager::new(ExtensionHostOptions::default());
+    let (tx_event, mut rx_event) = mpsc::channel(8);
+    tokio::spawn(async move { while rx_event.recv().await.is_some() {} });
+    let (gate, _requests) = NestedCallGate::new(None, tx_event, Duration::from_secs(60));
+    let context = ToolContext::new(workspace)
+        .with_session_objects(crate::rlm::session::SessionObjectSnapshot::new(
+            "grant-session".into(),
+            "fixture-model".into(),
+            workspace.to_path_buf(),
+            None,
+            Arc::new(Vec::new()),
+        ))
+        .with_origin_turn_id("grant-turn");
+    Host {
+        manager,
+        context,
+        gate: gate.for_extension(
+            ExtensionCaller {
+                origin: "extension:grant".to_string(),
+                tool: "grant_tool".to_string(),
+                scope: "ext:grant@hash".to_string(),
+            },
+            Vec::new(),
+        ),
+    }
+}
+
+impl Host {
+    fn load(&self, plugins: &Plugins, name: &str) -> OwnerRef {
+        let authority = plugins.registry().authority_for(name).unwrap();
+        let services = codewhale_plugins::registry::granted_host_services(&authority)
+            .unwrap()
+            .into_iter()
+            .filter_map(|service| DshService::parse(service.name()))
+            .collect();
+        let mut registry = self.manager.shared.registry.lock().unwrap();
+        let owner = registry
+            .begin_owner(
+                HostTier::Plugin,
+                authority.plugin_id.as_str(),
+                name,
+                Some(authority.clone()),
+                &authority.content_hash,
+            )
+            .unwrap();
+        registry.set_host_services(&owner, services);
+        registry.mark_active(&owner);
+        owner
+    }
+
+    fn mint(&self, tier: HostTier, owner: &OwnerRef) -> InvocationGuard {
+        self.manager
+            .shared
+            .core_calls
+            .begin_scoped(
+                tier,
+                HOST,
+                owner,
+                "call-1",
+                self.gate.extension().unwrap().0,
+                &self.context,
+                &self.gate,
+                None,
+                String::new(),
+                &self.manager.shared.broker_services(owner),
+            )
+            .expect("an invocation")
+    }
+
+    fn services(&self, owner: &OwnerRef) -> Vec<&'static str> {
+        self.mint(HostTier::Plugin, owner)
+            .broker_tickets()
+            .unwrap_or_default()
+            .into_iter()
+            .filter_map(|wire| DshService::parse(&wire.service).map(DshService::name))
+            .collect()
+    }
+
+    async fn call(
+        &self,
+        table: &[(DshService, Arm)],
+        owner: &OwnerRef,
+        ticket: &str,
+        service: &str,
+    ) -> (Result<Value, RpcErrorWire>, Vec<String>) {
+        let (cx, mut violations, _cancel) = HostRequestContext::for_test(1);
+        let result = self
+            .manager
+            .shared
+            .core_calls
+            .serve_broker_in(
+                table,
+                &self.manager.shared,
+                HostTier::Plugin,
+                HOST,
+                DshBrokerParams {
+                    owner: owner.clone(),
+                    ticket: ticket.to_string(),
+                    service: service.to_string(),
+                    method: "echo".to_string(),
+                    input: json!({ "text": "ok", "granted": ["llm"], "host_services": ["llm"] }),
+                },
+                cx,
+            )
+            .await;
+        let mut seen = Vec::new();
+        while let Ok(violation) = violations.try_recv() {
+            seen.push(violation);
+        }
+        (result, seen)
+    }
+}
+
+fn ticket(guard: &InvocationGuard, service: &str) -> String {
+    guard
+        .broker_tickets()
+        .unwrap_or_default()
+        .into_iter()
+        .find(|wire| wire.service == service)
+        .map(|wire| wire.ticket)
+        .unwrap_or_else(|| panic!("no {service} ticket"))
+}
+
+fn refusal(result: &Result<Value, RpcErrorWire>) -> (i64, String, String) {
+    let error = result.as_ref().expect_err("a refusal");
+    (
+        error.code,
+        error.data.as_ref().unwrap()["dsh_refusal"]
+            .as_str()
+            .unwrap()
+            .to_string(),
+        error.message.clone(),
+    )
+}
+
+fn not_granted(service: &str) -> (i64, String, String) {
+    (
+        error_code::REFUSED,
+        "not_granted".to_string(),
+        format!("the {service} service is not granted to this plugin"),
+    )
+}
+
+#[derive(serde::Deserialize)]
+#[serde(tag = "method", content = "input")]
+enum Echo {
+    #[serde(rename = "echo")]
+    Echo { text: String },
+}
+
+impl BrokerMethods for Echo {
+    const NAMES: &'static [&'static str] = &["echo"];
+}
+
+fn echo_arm(call: BrokerCall) -> BrokerFuture {
+    Box::pin(async move {
+        let Echo::Echo { text } = decode::<Echo>(&call)?;
+        Ok(json!({ "plugin": call.owner.plugin_id, "service": call.service.name(), "text": text }))
+    })
+}
+
+fn echo() -> Vec<(DshService, Arm)> {
+    DshService::ALL
+        .into_iter()
+        .map(|service| (service, echo_arm as Arm))
+        .collect()
+}
+
+static WAITING: AtomicBool = AtomicBool::new(false);
+static WITHDRAWN: AtomicBool = AtomicBool::new(false);
+
+fn waiting_arm(call: BrokerCall) -> BrokerFuture {
+    Box::pin(async move {
+        let cancel = call.context.cancel().clone();
+        tokio::spawn(async move {
+            cancel.cancelled().await;
+            WITHDRAWN.store(true, Ordering::SeqCst);
+        });
+        WAITING.store(true, Ordering::SeqCst);
+        std::future::pending::<()>().await;
+        Err(BrokerRefusal::NotAvailable(call.service))
+    })
+}
+
+async fn until(what: &str, done: impl Fn() -> bool) {
+    for _ in 0..400 {
+        if done() {
+            return;
+        }
+        tokio::time::sleep(Duration::from_millis(10)).await;
+    }
+    panic!("timed out waiting for {what}");
+}
+
+#[test]
+fn the_engine_and_the_review_record_name_the_same_services() {
+    assert_eq!(
+        DshService::ALL.map(DshService::name),
+        HostService::ALL.map(HostService::name)
+    );
+    for service in DshService::ALL {
+        assert!(!super::dsh_broker::offered(service));
+    }
+    let _offer = TestOffer::only(&[HostService::Remote]);
+    assert!(super::dsh_broker::offered(DshService::Remote));
+    assert!(!super::dsh_broker::offered(DshService::Network));
+}
+
+#[test]
+fn an_agent_approved_owner_never_loads_into_the_reviewed_host() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&[HostService::Network]);
+    let plugins = Plugins::new(&[("reviewed", &["network"]), ("made", &["network"])]);
+    let (desired, errors) = super::desired_owners(&plugins.registry());
+    assert_eq!(desired.len(), 2, "{errors:?}");
+
+    plugins.review_by_agent("made");
+    let registry = plugins.registry();
+    assert!(registry.get("made").unwrap().active());
+    let (desired, errors) = super::desired_owners(&registry);
+    let names: Vec<&str> = desired
+        .values()
+        .map(|owner| owner.plugin_name.as_str())
+        .collect();
+    assert_eq!(names, vec!["reviewed"]);
+    assert_eq!(
+        desired.values().next().unwrap().host_services,
+        vec![DshService::Network]
+    );
+    assert_eq!(
+        errors
+            .iter()
+            .filter(|error| error.contains("`made` was approved by the agent"))
+            .count(),
+        1,
+        "{errors:?}"
+    );
+}
+
+#[test]
+fn a_record_that_cannot_be_read_at_the_scan_loads_no_owner() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let plugins = Plugins::new(&[("alpha", &[])]);
+    let registry = plugins.registry();
+    let (sources, errors) = codewhale_plugins::runtime::active_component_sources(
+        &registry,
+        codewhale_plugins::activation::PluginActivationCapability::Native,
+    );
+    assert_eq!(sources.len(), 1, "{errors:?}");
+    plugins.registry().disable("alpha").unwrap();
+    let (desired, errors) = super::desired_owners_from(&registry, sources, errors);
+    assert!(desired.is_empty(), "{:?}", desired.keys());
+    assert_eq!(
+        errors
+            .iter()
+            .filter(|error| error
+                .contains("`alpha` was not loaded because its review record could not be read"))
+            .count(),
+        1,
+        "{errors:?}"
+    );
+}
+
+#[tokio::test]
+async fn no_broker_ticket_is_minted_for_a_plugin_whose_reviewed_record_does_not_name_the_service() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let offer = TestOffer::only(&[HostService::Network, HostService::Llm]);
+    let granted = Plugins::new(&[("alpha", &["network"])]);
+    let host_a = host(&granted.config.workspace);
+    let alpha = host_a.load(&granted, "alpha");
+    assert_eq!(host_a.services(&alpha), vec!["network"]);
+    let guard = host_a.mint(HostTier::Plugin, &alpha);
+    let network = ticket(&guard, "network");
+    let (served, _) = host_a.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(served.unwrap()["service"], "network");
+    let (wrong, _) = host_a.call(&echo(), &alpha, &network, "llm").await;
+    assert_eq!(refusal(&wrong).1, "ticket_refused");
+
+    let ungranted = Plugins::new(&[("beta", &[])]);
+    let host_b = host(&ungranted.config.workspace);
+    let beta = host_b.load(&ungranted, "beta");
+    assert!(host_b.services(&beta).is_empty());
+    let forged = OwnerRef {
+        plugin_id: beta.plugin_id.clone(),
+        ..alpha.clone()
+    };
+    let (borrowed, _) = host_b.call(&echo(), &forged, &network, "network").await;
+    assert_eq!(refusal(&borrowed).1, "ticket_refused");
+
+    let unshown = Plugins::new(&[("gamma", &["network"])]);
+    unshown.review("gamma", false);
+    let host_c = host(&unshown.config.workspace);
+    let gamma = host_c.load(&unshown, "gamma");
+    assert!(
+        host_c.services(&gamma).is_empty(),
+        "a review that did not show the service grants none"
+    );
+
+    drop(offer);
+    assert!(
+        host_a.services(&alpha).is_empty(),
+        "a build that offers no service mints no broker ticket, whatever is recorded"
+    );
+    let (unreachable, _) = host_a.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(refusal(&unreachable), not_granted("network"));
+    for service in DshService::ALL {
+        let (stub, _) = host_a
+            .call(super::dsh_broker::TABLE, &alpha, &network, service.name())
+            .await;
+        assert!(stub.is_err(), "{}", service.name());
+    }
+}
+
+#[tokio::test]
+async fn no_broker_ticket_while_a_plugin_without_the_grant_shares_the_host() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&[HostService::Network, HostService::Llm]);
+    let plugins = Plugins::new(&[
+        ("alpha", &["network", "llm"]),
+        ("beta", &[]),
+        ("gamma", &["network"]),
+    ]);
+    plugins.review("alpha", true);
+    let host = host(&plugins.config.workspace);
+    let alpha = host.load(&plugins, "alpha");
+    assert_eq!(host.services(&alpha), vec!["llm", "network"]);
+    let alone = host.mint(HostTier::Plugin, &alpha);
+    let network = ticket(&alone, "network");
+    let llm = ticket(&alone, "llm");
+
+    let gamma = host.load(&plugins, "gamma");
+    assert_eq!(host.services(&alpha), vec!["network"]);
+    assert_eq!(host.services(&gamma), vec!["network"]);
+    let (shared, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(shared.unwrap()["plugin"], alpha.plugin_id);
+    let (unshared, _) = host.call(&echo(), &alpha, &llm, "llm").await;
+    assert_eq!(refusal(&unshared), not_granted("llm"));
+    let report = host
+        .manager
+        .shared
+        .registry
+        .lock()
+        .unwrap()
+        .take_withheld_report()
+        .unwrap();
+    assert_eq!(
+        report,
+        "host service `llm` is off: the review of `gamma` does not include it"
+    );
+    assert!(
+        host.manager
+            .shared
+            .registry
+            .lock()
+            .unwrap()
+            .take_withheld_report()
+            .is_none(),
+        "reported once"
+    );
+
+    let beta = {
+        let authority = plugins.registry().authority_for("beta").unwrap();
+        host.manager
+            .shared
+            .registry
+            .lock()
+            .unwrap()
+            .begin_owner(
+                HostTier::Plugin,
+                authority.plugin_id.as_str(),
+                "beta",
+                Some(authority.clone()),
+                &authority.content_hash,
+            )
+            .unwrap()
+    };
+    assert!(
+        host.services(&alpha).is_empty(),
+        "an activating plugin without the grant already withholds it"
+    );
+    assert!(host.services(&gamma).is_empty());
+    assert!(host.services(&beta).is_empty());
+    let (withheld, _) = host.call(&echo(), &alpha, &network, "network").await;
+    let own = Plugins::new(&[("delta", &[])]);
+    let other_host = self::host(&own.config.workspace);
+    let delta = other_host.load(&own, "delta");
+    let lacking = other_host.mint(HostTier::Plugin, &delta);
+    assert!(lacking.broker_tickets().is_none());
+    assert_eq!(
+        refusal(&withheld),
+        not_granted("network"),
+        "the refusal is the same whoever lacks the grant, and names nobody"
+    );
+    assert!(!refusal(&withheld).2.contains("beta"));
+    let report = host
+        .manager
+        .shared
+        .registry
+        .lock()
+        .unwrap()
+        .take_withheld_report()
+        .unwrap();
+    assert_eq!(
+        report,
+        "host service `llm` is off: the reviews of `beta`, `gamma` do not include it; host service `network` is off: the review of `beta` does not include it"
+    );
+}
+
+#[tokio::test]
+async fn a_plugin_that_left_the_host_withholds_every_service_until_the_host_exits() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&[HostService::Network]);
+    let plugins = Plugins::new(&[("alpha", &["network"]), ("gamma", &["network"])]);
+    plugins.review("alpha", true);
+    let host = host(&plugins.config.workspace);
+    let alpha = host.load(&plugins, "alpha");
+    let gamma = host.load(&plugins, "gamma");
+    assert_eq!(host.services(&alpha), vec!["network"]);
+    let guard = host.mint(HostTier::Plugin, &alpha);
+    let network = ticket(&guard, "network");
+    assert!(
+        !host
+            .manager
+            .shared
+            .registry
+            .lock()
+            .unwrap()
+            .host_services_await_restart()
+    );
+
+    {
+        let mut registry = host.manager.shared.registry.lock().unwrap();
+        assert_eq!(registry.revoke_owner(&gamma.plugin_id), Some(gamma.clone()));
+        registry.forget_owner(&gamma.plugin_id);
+        assert!(registry.host_services_await_restart());
+        assert_eq!(
+            registry.take_withheld_report().unwrap(),
+            "host services are off until the plugin host restarts: a plugin that was turned off, changed or failed is still loaded in it"
+        );
+    }
+    assert!(
+        host.services(&alpha).is_empty(),
+        "code that was loaded cannot be unloaded: nothing is given until the process is gone"
+    );
+    let (lingering, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(refusal(&lingering), not_granted("network"));
+
+    let again = host.load(&plugins, "gamma");
+    assert!(host.services(&alpha).is_empty());
+    assert!(host.services(&again).is_empty());
+
+    {
+        let mut registry = host.manager.shared.registry.lock().unwrap();
+        registry.host_exited(HostTier::Plugin, "planned restart");
+        assert!(!registry.host_services_await_restart());
+    }
+    let alpha = host.load(&plugins, "alpha");
+    assert_eq!(host.services(&alpha), vec!["network"]);
+
+    let failing = host.load(&plugins, "gamma");
+    host.manager
+        .shared
+        .registry
+        .lock()
+        .unwrap()
+        .mark_failed(&failing, super::registry::OwnerState::Failed("boom".into()));
+    assert!(host.services(&alpha).is_empty());
+    host.manager
+        .shared
+        .registry
+        .lock()
+        .unwrap()
+        .host_process_started(HostTier::Plugin);
+    assert_eq!(host.services(&alpha), vec!["network"]);
+}
+
+#[tokio::test]
+async fn a_grant_is_read_from_the_owner_record_at_mint_and_at_redeem_never_from_the_wire() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&[HostService::Network, HostService::Llm]);
+    let plugins = Plugins::new(&[("alpha", &["network"])]);
+    let host = host(&plugins.config.workspace);
+    let alpha = host.load(&plugins, "alpha");
+    let guard = host.mint(HostTier::Plugin, &alpha);
+    let network = ticket(&guard, "network");
+    let (served, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert!(served.is_ok(), "{served:?}");
+    let (claimed, _) = host.call(&echo(), &alpha, &network, "llm").await;
+    assert_eq!(
+        refusal(&claimed).1,
+        "ticket_refused",
+        "input that claims a grant grants nothing"
+    );
+
+    plugins.review("alpha", false);
+    let (reviewed_again, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(
+        refusal(&reviewed_again),
+        not_granted("network"),
+        "a new review that drops the service refuses the next call of the running tool"
+    );
+    assert_eq!(
+        host.services(&alpha),
+        vec!["network"],
+        "the owner record is replaced by reconcile; until then redeem reads the review record"
+    );
+
+    plugins.review("alpha", true);
+    let (stale, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(
+        refusal(&stale),
+        not_granted("network"),
+        "an owner from before the review holds nothing, whatever the new review grants"
+    );
+    host.manager
+        .shared
+        .registry
+        .lock()
+        .unwrap()
+        .host_exited(HostTier::Plugin, "restart");
+    let current = host.load(&plugins, "alpha");
+    let guard = host.mint(HostTier::Plugin, &current);
+    let (fresh, _) = host
+        .call(&echo(), &current, &ticket(&guard, "network"), "network")
+        .await;
+    assert!(fresh.is_ok(), "{fresh:?}");
+
+    std::fs::write(&plugins.config.state_path, b"{ not json").unwrap();
+    let (unreadable, _) = host
+        .call(&echo(), &current, &ticket(&guard, "network"), "network")
+        .await;
+    assert_eq!(refusal(&unreadable), not_granted("network"));
+}
+
+#[tokio::test]
+async fn a_disable_from_another_process_stops_broker_calls_of_a_running_tool() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&[HostService::Network]);
+    let plugins = Plugins::new(&[("alpha", &["network"]), ("gamma", &["network"])]);
+    plugins.review("alpha", true);
+    let host = host(&plugins.config.workspace);
+    let alpha = host.load(&plugins, "alpha");
+    let _gamma = host.load(&plugins, "gamma");
+    let guard = host.mint(HostTier::Plugin, &alpha);
+    let network = ticket(&guard, "network");
+    let waiting: Vec<(DshService, Arm)> = vec![(DshService::Network, waiting_arm as Arm)];
+
+    let in_flight = host.call(&waiting, &alpha, &network, "network");
+    let elsewhere = async {
+        until("the arm to start", || WAITING.load(Ordering::SeqCst)).await;
+        plugins.registry().disable("gamma").unwrap();
+    };
+    let ((stopped, violations), ()) = tokio::join!(in_flight, elsewhere);
+    assert_eq!(
+        refusal(&stopped),
+        not_granted("network"),
+        "a co-hosted plugin turned off elsewhere withdraws the call in flight"
+    );
+    assert!(violations.is_empty());
+    until("the arm's cancellation", || {
+        WITHDRAWN.load(Ordering::SeqCst)
+    })
+    .await;
+
+    let (next, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(refusal(&next), not_granted("network"));
+    assert_eq!(
+        host.services(&alpha),
+        vec!["network"],
+        "this process has not reconciled yet; the review record already refuses"
+    );
+
+    plugins.registry().enable("gamma").unwrap();
+    let (spent, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(
+        refusal(&spent),
+        not_granted("network"),
+        "the loaded owner is from before the plugin was turned off"
+    );
+    plugins.registry().disable("alpha").unwrap();
+    let (own, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(refusal(&own), not_granted("network"));
+}
+
+#[tokio::test]
+async fn a_builtin_tier_owner_never_gets_a_broker_ticket() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&HostService::ALL);
+    let workspace = tempfile::tempdir().unwrap();
+    let host = host(workspace.path());
+    let builtin = {
+        let mut registry = host.manager.shared.registry.lock().unwrap();
+        let owner = registry
+            .begin_owner(HostTier::Builtin, "host:mcp", "mcp", None, "digest")
+            .unwrap();
+        registry.set_host_services(&owner, DshService::ALL.to_vec());
+        registry.mark_active(&owner);
+        assert!(
+            DshService::ALL
+                .into_iter()
+                .all(|service| !registry.host_service_granted(&owner, service))
+        );
+        owner
+    };
+    assert!(host.manager.shared.broker_services(&builtin).is_empty());
+    assert!(
+        host.mint(HostTier::Builtin, &builtin)
+            .broker_tickets()
+            .is_none()
+    );
+    let _everything = super::dsh_broker::TestGrants::only(&DshService::ALL);
+    let forced = host
+        .manager
+        .shared
+        .core_calls
+        .begin(
+            HostTier::Builtin,
+            HOST,
+            &builtin,
+            "call-2",
+            host.gate.extension().unwrap().0,
+            &host.context,
+            &host.gate,
+        )
+        .unwrap();
+    assert!(
+        forced.broker_tickets().is_none(),
+        "no override mints a broker ticket for the built-in tier"
+    );
+}
+
+#[tokio::test]
+async fn a_broker_ticket_is_refused_by_core_call_checkpoint_question_and_subagent() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&[HostService::Network]);
+    let plugins = Plugins::new(&[("alpha", &["network"])]);
+    let host = host(&plugins.config.workspace);
+    let alpha = host.load(&plugins, "alpha");
+    let guard = host.mint(HostTier::Plugin, &alpha);
+    let network = ticket(&guard, "network");
+    let shared = &host.manager.shared;
+    let cx = |id| HostRequestContext::for_test(id).0;
+    let refused = |result: Result<Value, RpcErrorWire>, what: &str| {
+        let error = result.expect_err(what);
+        assert_eq!(error.code, error_code::REFUSED, "{what}: {error:?}");
+        assert_eq!(
+            error.message, "the ticket is not valid for this request",
+            "{what}"
+        );
+    };
+
+    refused(
+        shared
+            .core_calls
+            .serve(
+                shared,
+                HostTier::Plugin,
+                HOST,
+                super::protocol::CoreCallParams {
+                    owner: alpha.clone(),
+                    ticket: network.clone(),
+                    name: "read_file".into(),
+                    input: json!({ "path": "x" }),
+                },
+                cx(1),
+            )
+            .await,
+        "core/call",
+    );
+    refused(
+        shared
+            .core_calls
+            .serve_checkpoint(
+                shared,
+                HostTier::Plugin,
+                HOST,
+                super::protocol::SessionCheckpointParams {
+                    owner: alpha.clone(),
+                    ticket: network.clone(),
+                },
+                cx(2),
+            )
+            .await,
+        "session/checkpoint",
+    );
+    refused(
+        shared
+            .core_calls
+            .serve_question(
+                shared,
+                HostTier::Plugin,
+                HOST,
+                super::protocol::UserQuestionParams {
+                    owner: alpha.clone(),
+                    ticket: network.clone(),
+                    questions: Vec::new(),
+                },
+                cx(3),
+            )
+            .await,
+        "user-questions/ask",
+    );
+    refused(
+        shared
+            .core_calls
+            .serve_subagent(
+                shared,
+                HostTier::Plugin,
+                HOST,
+                HostRequest::SubagentStart(super::protocol::SubagentStartParams {
+                    owner: alpha.clone(),
+                    ticket: network.clone(),
+                    child_id: "child".into(),
+                    prompt: "p".into(),
+                    model: None,
+                    persona: None,
+                    denied_tools: Vec::new(),
+                    delivery: "caller".into(),
+                }),
+                cx(4),
+            )
+            .await,
+        "subagent/start",
+    );
+    let (still_good, _) = host.call(&echo(), &alpha, &network, "network").await;
+    assert!(still_good.is_ok(), "{still_good:?}");
+}
+
+#[tokio::test]
+async fn a_spent_or_just_ended_broker_ticket_is_a_limit_not_a_forgery() {
+    let _policy = TestPolicyGuard::extension_host(true);
+    let _offer = TestOffer::only(&[HostService::Network]);
+    let plugins = Plugins::new(&[("alpha", &["network"])]);
+    let host = host(&plugins.config.workspace);
+    let alpha = host.load(&plugins, "alpha");
+    let guard = host.mint(HostTier::Plugin, &alpha);
+    let network = ticket(&guard, "network");
+    for _ in 0..super::core_call::MAX_CALLS_PER_INVOCATION {
+        let (served, _) = host.call(&echo(), &alpha, &network, "network").await;
+        assert!(served.is_ok(), "{served:?}");
+    }
+    let (spent, violations) = host.call(&echo(), &alpha, &network, "network").await;
+    assert_eq!(
+        refusal(&spent),
+        (
+            error_code::REFUSED,
+            "limit".to_string(),
+            "this tool call's limit for the network service is used up".to_string()
+        )
+    );
+    assert!(violations.is_empty());
+
+    drop(guard);
+    let mut ended = Vec::new();
+    for _ in 0..(super::ticket::INVALID_BURST * 3) {
+        let (late, violations) = host.call(&echo(), &alpha, &network, "network").await;
+        assert_eq!(refusal(&late).1, "ticket_refused");
+        ended.extend(violations);
+    }
+    assert!(
+        ended.is_empty(),
+        "frames already in the pipe when a tool call ends do not end the host: {ended:?}"
+    );
+    for _ in 0..super::ticket::INVALID_BURST {
+        let (_, violations) = host.call(&echo(), &alpha, "cwt.guess", "network").await;
+        ended.extend(violations);
+    }
+    assert_eq!(ended.len(), 1, "a guessed ticket still does: {ended:?}");
+}
@@ -0,0 +1,6 @@
+use super::dsh_broker::{BrokerCall, BrokerFuture, not_available};
+use super::protocol::DshService;
+
+pub(super) fn serve(_call: BrokerCall) -> BrokerFuture {
+    not_available(DshService::Llm)
+}
@@ -0,0 +1,843 @@
+use std::collections::BTreeSet;
+use std::time::{Duration, Instant};
+
+use base64::{Engine as _, engine::general_purpose::STANDARD};
+use codewhale_secrets::Secrets;
+use serde::Deserialize;
+use serde_json::{Value, json};
+
+use super::dsh_broker::{BrokerCall, BrokerFuture, BrokerMethods, BrokerRefusal, decode};
+use super::protocol::DshService;
+use crate::tools::spec::ToolContext;
+use crate::tools::web::guard::validate_fetch_target;
+
+pub const CREDENTIAL_HANDLE_PREFIX: &str = "codewhale-credential:";
+const MAX_REF_LEN: usize = 128;
+const MAX_REDIRECTS: usize = 5;
+const MAX_HEADERS: usize = 64;
+const MAX_HEADER_BYTES: usize = 16 * 1024;
+const MAX_REQUEST_BYTES: usize = 8 * 1024 * 1024;
+const MAX_RESPONSE_BYTES: usize = 8 * 1024 * 1024;
+const DEFAULT_TIMEOUT: Duration = Duration::from_secs(30);
+const MAX_TIMEOUT: Duration = Duration::from_secs(120);
+const AUDIT_LABEL: &str = "dsh_network";
+const FORBIDDEN_HEADERS: &[&str] = &[
+    "host",
+    "connection",
+    "content-length",
+    "transfer-encoding",
+    "te",
+    "trailer",
+    "upgrade",
+    "keep-alive",
+    "proxy-authorization",
+    "proxy-connection",
+];
+const METHODS: &[&str] = &["GET", "HEAD", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"];
+
+#[derive(Deserialize)]
+#[serde(tag = "method", content = "input", deny_unknown_fields)]
+enum NetworkMethod {
+    #[serde(rename = "fetch")]
+    Fetch(FetchInput),
+    #[serde(rename = "credentials.describe")]
+    Describe(CredentialRef),
+    #[serde(rename = "credentials.resolve")]
+    Resolve(CredentialRef),
+    #[serde(rename = "credentials.set")]
+    Set(CredentialWrite),
+}
+
+impl BrokerMethods for NetworkMethod {
+    const NAMES: &'static [&'static str] = &[
+        "fetch",
+        "credentials.describe",
+        "credentials.resolve",
+        "credentials.set",
+    ];
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct FetchInput {
+    url: String,
+    #[serde(default)]
+    method: Option<String>,
+    #[serde(default)]
+    headers: Vec<(String, String)>,
+    #[serde(default)]
+    body_base64: Option<String>,
+    #[serde(default)]
+    timeout_ms: Option<u64>,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct CredentialRef {
+    #[serde(rename = "ref")]
+    name: String,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct CredentialWrite {
+    #[serde(rename = "ref")]
+    name: String,
+    value: String,
+}
+
+pub(super) struct NetworkAuthority {
+    pub hosts: BTreeSet<String>,
+    pub tool: Option<ToolContext>,
+    pub vault: Option<Secrets>,
+}
+
+impl NetworkAuthority {
+    fn withheld() -> Self {
+        Self {
+            hosts: BTreeSet::new(),
+            tool: None,
+            vault: None,
+        }
+    }
+}
+
+pub(super) fn serve(call: BrokerCall) -> BrokerFuture {
+    serve_with(call, NetworkAuthority::withheld())
+}
+
+pub(super) fn serve_with(call: BrokerCall, authority: NetworkAuthority) -> BrokerFuture {
+    Box::pin(async move {
+        let method = decode::<NetworkMethod>(&call)?;
+        let plugin = call.owner.plugin_id.clone();
+        match method {
+            NetworkMethod::Fetch(input) => {
+                let Some(tool) = authority.tool.as_ref() else {
+                    return Err(BrokerRefusal::NotAvailable(DshService::Network));
+                };
+                fetch(
+                    &plugin,
+                    &authority.hosts,
+                    tool,
+                    authority.vault.as_ref(),
+                    input,
+                )
+                .await
+            }
+            NetworkMethod::Describe(CredentialRef { name }) => {
+                let vault = vault(&authority)?;
+                let name = checked_ref(&name)?;
+                let set = read_secret(vault, &plugin, name)?.is_some();
+                tracing::info!(target: "codewhale::dsh_network", plugin = %plugin, credential = %name, set, "credential described");
+                Ok(json!({ "ref": name, "set": set, "handle": handle(name) }))
+            }
+            NetworkMethod::Resolve(CredentialRef { name }) => {
+                let vault = vault(&authority)?;
+                let name = checked_ref(&name)?;
+                let set = read_secret(vault, &plugin, name)?.is_some();
+                tracing::info!(target: "codewhale::dsh_network", plugin = %plugin, credential = %name, set, "credential resolved to its handle");
+                Ok(json!({ "ref": name, "value": set.then(|| handle(name)) }))
+            }
+            NetworkMethod::Set(CredentialWrite { name, value }) => {
+                let vault = vault(&authority)?;
+                let name = checked_ref(&name)?;
+                if value.is_empty() || value.contains(CREDENTIAL_HANDLE_PREFIX) {
+                    return Err(invalid(
+                        "a credential value must be a non-empty secret, not a handle",
+                    ));
+                }
+                vault
+                    .set(&vault_slot(&plugin, name), &value)
+                    .map_err(|_| invalid("the credential vault refused the write"))?;
+                tracing::info!(target: "codewhale::dsh_network", plugin = %plugin, credential = %name, "credential stored");
+                Ok(json!({ "ref": name, "set": true, "handle": handle(name) }))
+            }
+        }
+    })
+}
+
+fn invalid(message: impl Into<String>) -> BrokerRefusal {
+    BrokerRefusal::InvalidInput {
+        service: DshService::Network,
+        message: message.into(),
+    }
+}
+
+fn vault(authority: &NetworkAuthority) -> Result<&Secrets, BrokerRefusal> {
+    authority
+        .vault
+        .as_ref()
+        .ok_or(BrokerRefusal::NotAvailable(DshService::Network))
+}
+
+fn checked_ref(name: &str) -> Result<&str, BrokerRefusal> {
+    let ok = !name.is_empty()
+        && name.len() <= MAX_REF_LEN
+        && name
+            .bytes()
+            .all(|b| b.is_ascii_alphanumeric() || matches!(b, b'_' | b'-' | b'.'));
+    if ok {
+        Ok(name)
+    } else {
+        Err(invalid(format!(
+            "a credential ref is 1 to {MAX_REF_LEN} letters, digits, `_`, `-` or `.`"
+        )))
+    }
+}
+
+fn handle(name: &str) -> String {
+    format!("{CREDENTIAL_HANDLE_PREFIX}{name}")
+}
+
+fn vault_slot(plugin: &str, name: &str) -> String {
+    format!("dsh-plugin:{plugin}:{name}")
+}
+
+fn read_secret(vault: &Secrets, plugin: &str, name: &str) -> Result<Option<String>, BrokerRefusal> {
+    vault
+        .get(&vault_slot(plugin, name))
+        .map(|value| value.filter(|value| !value.is_empty()))
+        .map_err(|_| invalid("the credential vault could not be read"))
+}
+
+fn normalized_host(host: &str) -> String {
+    host.trim()
+        .trim_start_matches('[')
+        .trim_end_matches(']')
+        .trim_end_matches('.')
+        .to_ascii_lowercase()
+}
+
+fn same_origin(a: &reqwest::Url, b: &reqwest::Url) -> bool {
+    a.scheme() == b.scheme()
+        && a.host_str().map(normalized_host) == b.host_str().map(normalized_host)
+        && a.port_or_known_default() == b.port_or_known_default()
+}
+
+fn egress_host(url: &reqwest::Url, hosts: &BTreeSet<String>) -> Result<String, BrokerRefusal> {
+    if url.scheme() != "http" && url.scheme() != "https" {
+        return Err(invalid(
+            "egress refused: only http and https URLs are brokered",
+        ));
+    }
+    if !url.username().is_empty() || url.password().is_some() {
+        return Err(invalid("egress refused: URLs may not carry userinfo"));
+    }
+    let host = url
+        .host_str()
+        .map(normalized_host)
+        .ok_or_else(|| invalid("egress refused: the URL has no host"))?;
+    if hosts.iter().any(|allowed| normalized_host(allowed) == host) {
+        Ok(host)
+    } else {
+        Err(invalid(format!(
+            "egress refused: `{}` is not one of this plugin's reviewed network hosts",
+            host.chars().take(253).collect::<String>()
+        )))
+    }
+}
+
+struct Substituted {
+    headers: Vec<(reqwest::header::HeaderName, reqwest::header::HeaderValue)>,
+    secrets: Vec<(String, String)>,
+}
+
+fn substitute_headers(
+    plugin: &str,
+    vault: Option<&Secrets>,
+    headers: &[(String, String)],
+) -> Result<Substituted, BrokerRefusal> {
+    let mut out = Vec::with_capacity(headers.len());
+    let mut secrets: Vec<(String, String)> = Vec::new();
+    for (name, value) in headers {
+        let mut resolved = String::with_capacity(value.len());
+        let mut rest = value.as_str();
+        while let Some(at) = rest.find(CREDENTIAL_HANDLE_PREFIX) {
+            resolved.push_str(&rest[..at]);
+            let tail = &rest[at + CREDENTIAL_HANDLE_PREFIX.len()..];
+            let end = tail
+                .find(|c: char| !(c.is_ascii_alphanumeric() || matches!(c, '_' | '-' | '.')))
+                .unwrap_or(tail.len());
+            let reference = checked_ref(&tail[..end])?;
+            let vault = vault.ok_or(BrokerRefusal::NotAvailable(DshService::Network))?;
+            let secret = read_secret(vault, plugin, reference)?.ok_or_else(|| {
+                invalid(format!(
+                    "credential `{reference}` is not set for this plugin"
+                ))
+            })?;
+            resolved.push_str(&secret);
+            if !secrets.iter().any(|(_, known)| *known == secret) {
+                secrets.push((handle(reference), secret));
+            }
+            rest = &tail[end..];
+        }
+        resolved.push_str(rest);
+        let header_name = reqwest::header::HeaderName::from_bytes(name.as_bytes())
+            .map_err(|_| invalid("a request header name is not valid"))?;
+        let header_value = reqwest::header::HeaderValue::from_str(&resolved).map_err(|_| {
+            invalid(format!(
+                "request header `{header_name}` has an invalid value"
+            ))
+        })?;
+        out.push((header_name, header_value));
+    }
+    Ok(Substituted {
+        headers: out,
+        secrets,
+    })
+}
+
+fn scrub(bytes: &[u8], secrets: &[(String, String)]) -> Vec<u8> {
+    let mut out = bytes.to_vec();
+    for (handle, secret) in secrets {
+        let needle = secret.as_bytes();
+        if needle.is_empty() {
+            continue;
+        }
+        let mut next = Vec::with_capacity(out.len());
+        let mut i = 0;
+        while i < out.len() {
+            if out[i..].starts_with(needle) {
+                next.extend_from_slice(handle.as_bytes());
+                i += needle.len();
+            } else {
+                next.push(out[i]);
+                i += 1;
+            }
+        }
+        out = next;
+    }
+    out
+}
+
+async fn fetch(
+    plugin: &str,
+    hosts: &BTreeSet<String>,
+    tool: &ToolContext,
+    vault: Option<&Secrets>,
+    input: FetchInput,
+) -> Result<Value, BrokerRefusal> {
+    let mut url = reqwest::Url::parse(&input.url).map_err(|_| invalid("the URL is not valid"))?;
+    if input.url.contains(CREDENTIAL_HANDLE_PREFIX) {
+        return Err(invalid(
+            "credential handles are substituted only in request header values",
+        ));
+    }
+    let mut method = input
+        .method
+        .as_deref()
+        .unwrap_or("GET")
+        .to_ascii_uppercase();
+    if !METHODS.contains(&method.as_str()) {
+        return Err(invalid(
+            "the request method is not one the network broker sends",
+        ));
+    }
+    if input.headers.len() > MAX_HEADERS
+        || input
+            .headers
+            .iter()
+            .map(|(name, value)| name.len() + value.len())
+            .sum::<usize>()
+            > MAX_HEADER_BYTES
+    {
+        return Err(invalid("too many or too large request headers"));
+    }
+    if let Some((name, _)) = input.headers.iter().find(|(name, _)| {
+        FORBIDDEN_HEADERS
+            .iter()
+            .any(|forbidden| name.eq_ignore_ascii_case(forbidden))
+    }) {
+        return Err(invalid(format!(
+            "request header `{}` is set by the broker, not the plugin",
+            name.chars().take(64).collect::<String>()
+        )));
+    }
+    let mut body = match input.body_base64.as_deref() {
+        Some(encoded) => {
+            let bytes = STANDARD
+                .decode(encoded)
+                .map_err(|_| invalid("body_base64 is not valid base64"))?;
+            if bytes.len() > MAX_REQUEST_BYTES {
+                return Err(invalid("the request body is too large"));
+            }
+            Some(bytes)
+        }
+        None => None,
+    };
+    let timeout = input
+        .timeout_ms
+        .map_or(DEFAULT_TIMEOUT, Duration::from_millis)
+        .min(MAX_TIMEOUT);
+    let deadline = Instant::now() + timeout;
+    let origin = url.clone();
+    let host = egress_host(&url, hosts)?;
+    let mut redirects = 0usize;
+    let mut substituted: Option<Substituted> = None;
+    let response = loop {
+        egress_host(&url, hosts)?;
+        let pin = validate_fetch_target(&url, tool, AUDIT_LABEL)
+            .await
+            .map_err(|error| invalid(format!("egress refused: {error}")))?;
+        let substitution = match substituted.take() {
+            Some(done) => done,
+            None => substitute_headers(plugin, vault, &input.headers)?,
+        };
+        let remaining = deadline.saturating_duration_since(Instant::now());
+        if remaining.is_zero() {
+            return Err(invalid("the request timed out"));
+        }
+        let mut builder = codewhale_net::guard::guarded_reqwest_client_builder()
+            .timeout(remaining)
+            .redirect(reqwest::redirect::Policy::none());
+        if let Some((name, ip)) = pin {
+            builder = builder.resolve(&name, std::net::SocketAddr::new(ip, 0));
+        }
+        let client = builder
+            .build()
+            .map_err(|_| invalid("the network broker could not build its client"))?;
+        let verb = reqwest::Method::from_bytes(method.as_bytes())
+            .map_err(|_| invalid("the request method is not valid"))?;
+        let mut request = client.request(verb, url.clone());
+        for (name, value) in &substitution.headers {
+            request = request.header(name, value);
+        }
+        if let Some(bytes) = body.clone() {
+            request = request.body(bytes);
+        }
+        let response = request.send().await.map_err(|error| {
+            invalid(format!(
+                "the request failed: {}",
+                if error.is_timeout() {
+                    "timed out"
+                } else if error.is_connect() {
+                    "could not connect"
+                } else {
+                    "transport error"
+                }
+            ))
+        })?;
+        substituted = Some(substitution);
+        let status = response.status();
+        if !status.is_redirection() {
+            break response;
+        }
+        let Some(location) = response
+            .headers()
+            .get(reqwest::header::LOCATION)
+            .and_then(|value| value.to_str().ok())
+        else {
+            break response;
+        };
+        if redirects >= MAX_REDIRECTS {
+            return Err(invalid("the request exceeded the five-redirect limit"));
+        }
+        let next = url
+            .join(location)
+            .map_err(|_| invalid("the redirect location is not valid"))?;
+        if !same_origin(&origin, &next) {
+            tracing::info!(target: "codewhale::dsh_network", plugin = %plugin, host = %host, "cross-origin redirect refused");
+            return Err(invalid(
+                "egress refused: a redirect may not leave the requested origin",
+            ));
+        }
+        if status == reqwest::StatusCode::SEE_OTHER
+            || (matches!(status.as_u16(), 301 | 302) && method == "POST")
+        {
+            method = "GET".into();
+            body = None;
+        }
+        url = next;
+        redirects += 1;
+    };
+    let secrets = substituted.map(|done| done.secrets).unwrap_or_default();
+    let status = response.status().as_u16();
+    let final_url = response.url().to_string();
+    let headers: Vec<(String, String)> = response
+        .headers()
+        .iter()
+        .filter_map(|(name, value)| {
+            let value = String::from_utf8(scrub(value.as_bytes(), &secrets)).ok()?;
+            Some((name.as_str().to_string(), value))
+        })
+        .collect();
+    let mut response = response;
+    let mut bytes = Vec::new();
+    loop {
+        let remaining = deadline.saturating_duration_since(Instant::now());
+        let chunk = tokio::time::timeout(remaining, response.chunk())
+            .await
+            .map_err(|_| invalid("the response timed out"))?
+            .map_err(|_| invalid("the response body could not be read"))?;
+        let Some(chunk) = chunk else { break };
+        if bytes.len() + chunk.len() > MAX_RESPONSE_BYTES {
+            return Err(invalid(
+                "the response body is larger than the broker returns",
+            ));
+        }
+        bytes.extend_from_slice(&chunk);
+    }
+    tracing::info!(target: "codewhale::dsh_network", plugin = %plugin, host = %host, status, redirects, "brokered fetch");
+    Ok(json!({
+        "status": status,
+        "url": final_url,
+        "redirected": redirects > 0,
+        "headers": headers,
+        "body_base64": STANDARD.encode(scrub(&bytes, &secrets)),
+    }))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use codewhale_config::OwnerRef;
+    use codewhale_net::network_policy::{Decision, NetworkPolicy, NetworkPolicyDecider};
+    use codewhale_secrets::InMemoryKeyringStore;
+    use std::sync::Arc;
+    use wiremock::matchers::{header, method, path};
+    use wiremock::{Mock, MockServer, Request, Respond, ResponseTemplate};
+
+    const SECRET: &str = "sk-live-0123456789abcdef";
+
+    fn owner(plugin: &str) -> OwnerRef {
+        OwnerRef {
+            plugin_id: plugin.into(),
+            generation: 1,
+            owner_token: "t".into(),
+        }
+    }
+
+    fn call(plugin: &str, method: &str, input: Value) -> BrokerCall {
+        BrokerCall {
+            owner: owner(plugin),
+            session_id: "s".into(),
+            service: DshService::Network,
+            method: method.into(),
+            input,
+            context: super::super::dsh_broker::BrokerContext::detached_for_test(
+                &owner(plugin),
+                DshService::Network,
+            ),
+        }
+    }
+
+    fn policy(allow: &[&str], deny: &[&str]) -> ToolContext {
+        let policy = NetworkPolicy {
+            default: Decision::Deny.into(),
+            allow: allow.iter().map(|h| (*h).to_string()).collect(),
+            deny: deny.iter().map(|h| (*h).to_string()).collect(),
+            proxy: Vec::new(),
+            proxy_fake_ip_cidrs: Vec::new(),
+            audit: false,
+        };
+        ToolContext::new(std::path::PathBuf::from("."))
+            .with_network_policy(NetworkPolicyDecider::new(policy, None))
+    }
+
+    fn authority(hosts: &[&str], tool: ToolContext, vault: &Secrets) -> NetworkAuthority {
+        NetworkAuthority {
+            hosts: hosts.iter().map(|h| (*h).to_string()).collect(),
+            tool: Some(tool),
+            vault: Some(vault.clone()),
+        }
+    }
+
+    fn vault() -> Secrets {
+        Secrets::new(Arc::new(InMemoryKeyringStore::new()))
+    }
+
+    fn code(result: &Result<Value, BrokerRefusal>) -> &'static str {
+        result.as_ref().expect_err("a refusal").code()
+    }
+
+    fn message(result: &Result<Value, BrokerRefusal>) -> String {
+        format!("{:?}", result.as_ref().expect_err("a refusal"))
+    }
+
+    struct Echo;
+    impl Respond for Echo {
+        fn respond(&self, request: &Request) -> ResponseTemplate {
+            let auth = request
+                .headers
+                .get("authorization")
+                .and_then(|v| v.to_str().ok())
+                .unwrap_or_default()
+                .to_string();
+            ResponseTemplate::new(200)
+                .insert_header("x-echo", auth.as_str())
+                .set_body_string(format!("you sent {auth}"))
+        }
+    }
+
+    #[tokio::test]
+    async fn withheld_authority_refuses_typed_and_unknown_methods_are_named() {
+        let unknown = serve(call("a", "connect", json!({}))).await;
+        assert_eq!(code(&unknown), "unknown_method");
+        let bad = serve(call("a", "fetch", json!({"url": 1}))).await;
+        assert_eq!(code(&bad), "invalid_input");
+        for (method, input) in [
+            ("fetch", json!({"url": "https://example.com/"})),
+            ("credentials.resolve", json!({"ref": "K"})),
+            ("credentials.describe", json!({"ref": "K"})),
+            ("credentials.set", json!({"ref": "K", "value": "v"})),
+        ] {
+            assert_eq!(
+                code(&serve(call("a", method, input)).await),
+                "not_available",
+                "{method}"
+            );
+        }
+    }
+
+    #[tokio::test]
+    async fn credentials_never_leave_rust_and_are_scoped_to_their_plugin() {
+        let vault = vault();
+        let tool = policy(&[], &[]);
+        let set = serve_with(
+            call(
+                "a",
+                "credentials.set",
+                json!({"ref": "OPENAI_API_KEY", "value": SECRET}),
+            ),
+            authority(&[], tool.clone(), &vault),
+        )
+        .await
+        .unwrap();
+        assert!(!set.to_string().contains(SECRET));
+        let resolved = serve_with(
+            call("a", "credentials.resolve", json!({"ref": "OPENAI_API_KEY"})),
+            authority(&[], tool.clone(), &vault),
+        )
+        .await
+        .unwrap();
+        assert_eq!(resolved["value"], "codewhale-credential:OPENAI_API_KEY");
+        assert!(!resolved.to_string().contains(SECRET));
+        let foreign = serve_with(
+            call("b", "credentials.resolve", json!({"ref": "OPENAI_API_KEY"})),
+            authority(&[], tool.clone(), &vault),
+        )
+        .await
+        .unwrap();
+        assert_eq!(foreign["value"], Value::Null);
+        let traversal = serve_with(
+            call(
+                "b",
+                "credentials.describe",
+                json!({"ref": "../a:OPENAI_API_KEY"}),
+            ),
+            authority(&[], tool, &vault),
+        )
+        .await;
+        assert_eq!(code(&traversal), "invalid_input");
+    }
+
+    #[tokio::test]
+    async fn allowed_host_gets_the_secret_and_the_wire_back_never_carries_it() {
+        let server = MockServer::start().await;
+        Mock::given(method("GET"))
+            .and(path("/v1/models"))
+            .and(header("authorization", format!("Bearer {SECRET}").as_str()))
+            .respond_with(Echo)
+            .expect(1)
+            .mount(&server)
+            .await;
+        let vault = vault();
+        vault.set(&vault_slot("a", "KEY"), SECRET).unwrap();
+        let result = serve_with(
+            call(
+                "a",
+                "fetch",
+                json!({
+                    "url": format!("{}/v1/models", server.uri()),
+                    "headers": [["authorization", "Bearer codewhale-credential:KEY"]],
+                }),
+            ),
+            authority(&["127.0.0.1"], policy(&["127.0.0.1"], &[]), &vault),
+        )
+        .await
+        .unwrap();
+        assert_eq!(result["status"], 200);
+        let wire = result.to_string();
+        assert!(!wire.contains(SECRET), "{wire}");
+        let body = STANDARD
+            .decode(result["body_base64"].as_str().unwrap())
+            .unwrap();
+        assert_eq!(
+            String::from_utf8(body).unwrap(),
+            "you sent Bearer codewhale-credential:KEY"
+        );
+        assert!(
+            result["headers"]
+                .as_array()
+                .unwrap()
+                .iter()
+                .any(|pair| pair[0] == "x-echo" && pair[1] == "Bearer codewhale-credential:KEY")
+        );
+    }
+
+    #[tokio::test]
+    async fn unreviewed_denied_and_restricted_hosts_are_refused_before_any_connection() {
+        let server = MockServer::start().await;
+        Mock::given(method("GET"))
+            .respond_with(ResponseTemplate::new(200))
+            .expect(0)
+            .mount(&server)
+            .await;
+        let vault = vault();
+        let url = format!("{}/x", server.uri());
+        let unreviewed = serve_with(
+            call("a", "fetch", json!({"url": url})),
+            authority(&["api.example.com"], policy(&["127.0.0.1"], &[]), &vault),
+        )
+        .await;
+        assert_eq!(code(&unreviewed), "invalid_input");
+        assert!(message(&unreviewed).contains("reviewed network hosts"));
+        let denied = serve_with(
+            call("a", "fetch", json!({"url": url})),
+            authority(&["127.0.0.1"], policy(&[], &["127.0.0.1"]), &vault),
+        )
+        .await;
+        assert!(
+            message(&denied).contains("blocked by network policy"),
+            "{}",
+            message(&denied)
+        );
+        let unapproved = serve_with(
+            call("a", "fetch", json!({"url": url})),
+            authority(&["127.0.0.1"], policy(&[], &[]), &vault),
+        )
+        .await;
+        assert!(message(&unapproved).contains("egress refused"));
+        let metadata = serve_with(
+            call(
+                "a",
+                "fetch",
+                json!({"url": "http://169.254.169.254/latest"}),
+            ),
+            authority(
+                &["169.254.169.254"],
+                policy(&["169.254.169.254"], &[]),
+                &vault,
+            ),
+        )
+        .await;
+        assert!(
+            message(&metadata).contains("restricted"),
+            "{}",
+            message(&metadata)
+        );
+        let rebound = serve_with(
+            call("a", "fetch", json!({"url": "http://localhost/"})),
+            authority(
+                &["localhost"],
+                ToolContext::new(std::path::PathBuf::from(".")),
+                &vault,
+            ),
+        )
+        .await;
+        assert!(
+            message(&rebound).contains("localhost"),
+            "{}",
+            message(&rebound)
+        );
+        let in_url = serve_with(
+            call(
+                "a",
+                "fetch",
+                json!({"url": format!("{url}?k=codewhale-credential:KEY")}),
+            ),
+            authority(&["127.0.0.1"], policy(&["127.0.0.1"], &[]), &vault),
+        )
+        .await;
+        assert_eq!(code(&in_url), "invalid_input");
+        let host_header = serve_with(
+            call(
+                "a",
+                "fetch",
+                json!({"url": url, "headers": [["Host", "evil.example"]]}),
+            ),
+            authority(&["127.0.0.1"], policy(&["127.0.0.1"], &[]), &vault),
+        )
+        .await;
+        assert_eq!(code(&host_header), "invalid_input");
+    }
+
+    #[tokio::test]
+    async fn redirects_stay_on_origin_and_never_carry_the_secret_elsewhere() {
+        let server = MockServer::start().await;
+        let elsewhere = MockServer::start().await;
+        Mock::given(method("GET"))
+            .respond_with(ResponseTemplate::new(200))
+            .expect(0)
+            .mount(&elsewhere)
+            .await;
+        Mock::given(path("/away"))
+            .respond_with(
+                ResponseTemplate::new(302)
+                    .insert_header("location", format!("{}/steal", elsewhere.uri()).as_str()),
+            )
+            .mount(&server)
+            .await;
+        Mock::given(path("/rename"))
+            .respond_with(ResponseTemplate::new(302).insert_header(
+                "location",
+                server.uri().replace("127.0.0.1", "localhost").as_str(),
+            ))
+            .mount(&server)
+            .await;
+        Mock::given(path("/hop"))
+            .respond_with(ResponseTemplate::new(307).insert_header("location", "/landing"))
+            .mount(&server)
+            .await;
+        Mock::given(path("/landing"))
+            .and(header("authorization", SECRET))
+            .respond_with(ResponseTemplate::new(200).set_body_string("ok"))
+            .expect(1)
+            .mount(&server)
+            .await;
+        let vault = vault();
+        vault.set(&vault_slot("a", "KEY"), SECRET).unwrap();
+        let headers = json!([["authorization", "codewhale-credential:KEY"]]);
+        let both = authority(
+            &["127.0.0.1", "localhost"],
+            policy(&["127.0.0.1", "localhost"], &[]),
+            &vault,
+        );
+        let away = serve_with(
+            call(
+                "a",
+                "fetch",
+                json!({"url": format!("{}/away", server.uri()), "headers": headers}),
+            ),
+            both,
+        )
+        .await;
+        assert!(message(&away).contains("may not leave the requested origin"));
+        let renamed = serve_with(
+            call(
+                "a",
+                "fetch",
+                json!({"url": format!("{}/rename", server.uri()), "headers": headers}),
+            ),
+            authority(
+                &["127.0.0.1", "localhost"],
+                policy(&["127.0.0.1", "localhost"], &[]),
+                &vault,
+            ),
+        )
+        .await;
+        assert!(message(&renamed).contains("may not leave the requested origin"));
+        let hop = serve_with(
+            call(
+                "a",
+                "fetch",
+                json!({"url": format!("{}/hop", server.uri()), "headers": headers}),
+            ),
+            authority(&["127.0.0.1"], policy(&["127.0.0.1"], &[]), &vault),
+        )
+        .await
+        .unwrap();
+        assert_eq!(hop["status"], 200);
+        assert_eq!(hop["redirected"], true);
+    }
+}
@@ -0,0 +1,569 @@
+use std::collections::HashMap;
+use std::sync::{Mutex, OnceLock};
+use std::time::{Duration, Instant};
+
+use serde::Deserialize;
+use serde_json::{Value, json};
+use sha2::{Digest, Sha256};
+
+use super::dsh_broker::{BrokerCall, BrokerFuture, BrokerMethods, BrokerRefusal, decode};
+use super::protocol::DshService;
+
+pub const PAIRING_TTL: Duration = Duration::from_secs(10 * 60);
+pub const CLIENT_TTL: Duration = Duration::from_secs(30 * 60);
+pub const MAX_PENDING_PAIRINGS: usize = 4;
+const MAX_LABEL_CHARS: usize = 64;
+const GRANT_PREFIX: &str = "cwrg_";
+const PAIRING_PREFIX: &str = "cwrp_";
+const CLIENT_PREFIX: &str = "cwrc_";
+
+#[derive(Deserialize)]
+#[serde(
+    tag = "method",
+    content = "input",
+    rename_all = "snake_case",
+    deny_unknown_fields
+)]
+enum RemoteMethod {
+    Status {},
+    Pair {
+        #[serde(default)]
+        label: Option<String>,
+    },
+    Clients {},
+    Revoke {
+        grant: String,
+    },
+}
+
+impl BrokerMethods for RemoteMethod {
+    const NAMES: &'static [&'static str] = &["status", "pair", "clients", "revoke"];
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct RemotePairing {
+    pub grant: String,
+    pub plugin_id: String,
+    pub session_id: String,
+    pub label: String,
+    pub secret: String,
+    pub expires_in_seconds: u64,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct RemoteClient {
+    pub grant: String,
+    pub session_id: String,
+    pub token: String,
+    pub expires_in_seconds: u64,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum RemoteDenial {
+    Unknown,
+    Expired,
+    Replayed,
+    ForeignSession,
+}
+
+struct Client {
+    token_digest: [u8; 32],
+    label: String,
+    expires_at: Instant,
+}
+
+struct Grant {
+    plugin_id: String,
+    session_id: String,
+    label: String,
+    pairing_digest: [u8; 32],
+    pairing: Option<String>,
+    pairing_expires_at: Instant,
+    client: Option<Client>,
+}
+
+impl Grant {
+    fn state(&self, now: Instant) -> &'static str {
+        match &self.client {
+            Some(client) if now < client.expires_at => "paired",
+            Some(_) => "expired",
+            None if now < self.pairing_expires_at => "awaiting_host",
+            None => "expired",
+        }
+    }
+
+    fn retire_at(&self, pairing_ttl: Duration) -> Instant {
+        self.client
+            .as_ref()
+            .map_or(self.pairing_expires_at, |client| client.expires_at)
+            + pairing_ttl
+    }
+}
+
+#[derive(Default)]
+struct Grants {
+    by_id: HashMap<String, Grant>,
+    by_pairing: HashMap<[u8; 32], String>,
+    by_client: HashMap<[u8; 32], String>,
+}
+
+impl Grants {
+    fn remove(&mut self, id: &str) -> Option<Grant> {
+        let grant = self.by_id.remove(id)?;
+        self.by_pairing.remove(&grant.pairing_digest);
+        if let Some(client) = &grant.client {
+            self.by_client.remove(&client.token_digest);
+        }
+        Some(grant)
+    }
+
+    fn prune(&mut self, now: Instant, pairing_ttl: Duration) {
+        let retired: Vec<String> = self
+            .by_id
+            .iter()
+            .filter(|(_, grant)| now >= grant.retire_at(pairing_ttl))
+            .map(|(id, _)| id.clone())
+            .collect();
+        for id in retired {
+            self.remove(&id);
+        }
+    }
+}
+
+pub struct RemoteGrants {
+    pairing_ttl: Duration,
+    client_ttl: Duration,
+    grants: Mutex<Grants>,
+}
+
+pub fn remote_grants() -> &'static RemoteGrants {
+    static GRANTS: OnceLock<RemoteGrants> = OnceLock::new();
+    GRANTS.get_or_init(|| RemoteGrants::new(PAIRING_TTL, CLIENT_TTL))
+}
+
+pub(super) fn serve(call: BrokerCall) -> BrokerFuture {
+    Box::pin(std::future::ready(remote_grants().serve(&call)))
+}
+
+impl RemoteGrants {
+    #[must_use]
+    pub fn new(pairing_ttl: Duration, client_ttl: Duration) -> Self {
+        Self {
+            pairing_ttl,
+            client_ttl,
+            grants: Mutex::new(Grants::default()),
+        }
+    }
+
+    fn lock(&self) -> std::sync::MutexGuard<'_, Grants> {
+        let mut grants = self
+            .grants
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        grants.prune(Instant::now(), self.pairing_ttl);
+        grants
+    }
+
+    fn serve(&self, call: &BrokerCall) -> Result<Value, BrokerRefusal> {
+        let plugin = call.owner.plugin_id.as_str();
+        let session = call.session_id.as_str();
+        match decode::<RemoteMethod>(call)? {
+            RemoteMethod::Status {} => Ok(self.status(plugin, session)),
+            RemoteMethod::Pair { label } => self.pair(plugin, session, label.as_deref()),
+            RemoteMethod::Clients {} => Ok(self.clients(plugin, session)),
+            RemoteMethod::Revoke { grant } => self.revoke(plugin, session, &grant),
+        }
+    }
+
+    fn status(&self, plugin: &str, session: &str) -> Value {
+        let grants = self.lock();
+        let now = Instant::now();
+        let mut awaiting = 0;
+        let mut paired = 0;
+        for grant in grants.by_id.values() {
+            if grant.plugin_id != plugin || grant.session_id != session {
+                continue;
+            }
+            match grant.state(now) {
+                "awaiting_host" => awaiting += 1,
+                "paired" => paired += 1,
+                _ => {}
+            }
+        }
+        json!({
+            "transport": "runtime_http_sse",
+            "pairing": "host_presented",
+            "public_listener": false,
+            "tunnel": false,
+            "awaiting_host": awaiting,
+            "paired": paired,
+            "max_pending": MAX_PENDING_PAIRINGS,
+        })
+    }
+
+    fn pair(
+        &self,
+        plugin: &str,
+        session: &str,
+        label: Option<&str>,
+    ) -> Result<Value, BrokerRefusal> {
+        let label = clean_label(label).map_err(|message| BrokerRefusal::InvalidInput {
+            service: DshService::Remote,
+            message,
+        })?;
+        let mut grants = self.lock();
+        let now = Instant::now();
+        let pending = grants
+            .by_id
+            .values()
+            .filter(|grant| {
+                grant.plugin_id == plugin
+                    && grant.session_id == session
+                    && grant.state(now) == "awaiting_host"
+            })
+            .count();
+        if pending >= MAX_PENDING_PAIRINGS {
+            return Err(BrokerRefusal::InvalidInput {
+                service: DshService::Remote,
+                message: format!(
+                    "this plugin already has {MAX_PENDING_PAIRINGS} pairings awaiting the host in this session; revoke one first"
+                ),
+            });
+        }
+        let id = random_capability(GRANT_PREFIX);
+        let secret = random_capability(PAIRING_PREFIX);
+        let pairing_digest = digest(&secret);
+        grants.by_pairing.insert(pairing_digest, id.clone());
+        grants.by_id.insert(
+            id.clone(),
+            Grant {
+                plugin_id: plugin.to_string(),
+                session_id: session.to_string(),
+                label: label.clone(),
+                pairing_digest,
+                pairing: Some(secret),
+                pairing_expires_at: now + self.pairing_ttl,
+                client: None,
+            },
+        );
+        Ok(json!({
+            "grant": id,
+            "label": label,
+            "state": "awaiting_host",
+            "expires_in_seconds": self.pairing_ttl.as_secs(),
+        }))
+    }
+
+    fn clients(&self, plugin: &str, session: &str) -> Value {
+        let grants = self.lock();
+        let now = Instant::now();
+        let mut rows: Vec<Value> = grants
+            .by_id
+            .iter()
+            .filter(|(_, grant)| grant.plugin_id == plugin && grant.session_id == session)
+            .map(|(id, grant)| {
+                let expires_at = grant
+                    .client
+                    .as_ref()
+                    .map_or(grant.pairing_expires_at, |client| client.expires_at);
+                json!({
+                    "grant": id,
+                    "label": grant.label,
+                    "client": grant.client.as_ref().map(|client| client.label.clone()),
+                    "state": grant.state(now),
+                    "expires_in_seconds": expires_at.saturating_duration_since(now).as_secs(),
+                })
+            })
+            .collect();
+        rows.sort_by(|a, b| a["grant"].as_str().cmp(&b["grant"].as_str()));
+        json!({ "clients": rows })
+    }
+
+    fn revoke(&self, plugin: &str, session: &str, grant: &str) -> Result<Value, BrokerRefusal> {
+        let mut grants = self.lock();
+        let owned = grants
+            .by_id
+            .get(grant)
+            .is_some_and(|row| row.plugin_id == plugin && row.session_id == session);
+        if !owned {
+            return Err(BrokerRefusal::InvalidInput {
+                service: DshService::Remote,
+                message: "no such remote grant for this plugin and session".into(),
+            });
+        }
+        grants.remove(grant);
+        Ok(json!({ "grant": grant, "revoked": true }))
+    }
+
+    #[must_use]
+    pub fn awaiting_host(&self) -> Vec<RemotePairing> {
+        let grants = self.lock();
+        let now = Instant::now();
+        let mut rows: Vec<RemotePairing> = grants
+            .by_id
+            .iter()
+            .filter(|(_, grant)| grant.state(now) == "awaiting_host")
+            .filter_map(|(id, grant)| {
+                Some(RemotePairing {
+                    grant: id.clone(),
+                    plugin_id: grant.plugin_id.clone(),
+                    session_id: grant.session_id.clone(),
+                    label: grant.label.clone(),
+                    secret: grant.pairing.clone()?,
+                    expires_in_seconds: grant
+                        .pairing_expires_at
+                        .saturating_duration_since(now)
+                        .as_secs(),
+                })
+            })
+            .collect();
+        rows.sort_by(|a, b| a.grant.cmp(&b.grant));
+        rows
+    }
+
+    pub fn redeem(&self, secret: &str, client_label: &str) -> Result<RemoteClient, RemoteDenial> {
+        let mut grants = self.lock();
+        let now = Instant::now();
+        let id = grants
+            .by_pairing
+            .get(&digest(secret))
+            .cloned()
+            .ok_or(RemoteDenial::Unknown)?;
+        let client_ttl = self.client_ttl;
+        let grant = grants.by_id.get_mut(&id).ok_or(RemoteDenial::Unknown)?;
+        if grant.client.is_some() {
+            return Err(RemoteDenial::Replayed);
+        }
+        if now >= grant.pairing_expires_at {
+            return Err(RemoteDenial::Expired);
+        }
+        let token = random_capability(CLIENT_PREFIX);
+        let token_digest = digest(&token);
+        grant.pairing = None;
+        grant.client = Some(Client {
+            token_digest,
+            label: clean_label(Some(client_label)).unwrap_or_default(),
+            expires_at: now + client_ttl,
+        });
+        let session_id = grant.session_id.clone();
+        grants.by_client.insert(token_digest, id.clone());
+        Ok(RemoteClient {
+            grant: id,
+            session_id,
+            token,
+            expires_in_seconds: client_ttl.as_secs(),
+        })
+    }
+
+    pub fn authorize(&self, token: &str, session_id: &str) -> Result<String, RemoteDenial> {
+        let grants = self.lock();
+        let id = grants
+            .by_client
+            .get(&digest(token))
+            .ok_or(RemoteDenial::Unknown)?;
+        let grant = grants.by_id.get(id).ok_or(RemoteDenial::Unknown)?;
+        let client = grant.client.as_ref().ok_or(RemoteDenial::Unknown)?;
+        if Instant::now() >= client.expires_at {
+            return Err(RemoteDenial::Expired);
+        }
+        if grant.session_id != session_id {
+            return Err(RemoteDenial::ForeignSession);
+        }
+        Ok(id.clone())
+    }
+
+    pub fn revoke_session(&self, session_id: &str) -> usize {
+        let mut grants = self.lock();
+        let ids: Vec<String> = grants
+            .by_id
+            .iter()
+            .filter(|(_, grant)| grant.session_id == session_id)
+            .map(|(id, _)| id.clone())
+            .collect();
+        for id in &ids {
+            grants.remove(id);
+        }
+        ids.len()
+    }
+}
+
+fn clean_label(label: Option<&str>) -> Result<String, String> {
+    let label = label.unwrap_or("").trim();
+    if label.chars().any(char::is_control) {
+        return Err("a remote label may not contain control characters".into());
+    }
+    if label.chars().count() > MAX_LABEL_CHARS {
+        return Err(format!(
+            "a remote label is at most {MAX_LABEL_CHARS} characters"
+        ));
+    }
+    Ok(label.to_string())
+}
+
+fn digest(secret: &str) -> [u8; 32] {
+    Sha256::digest(secret.as_bytes()).into()
+}
+
+fn random_capability(prefix: &str) -> String {
+    format!(
+        "{prefix}{}{}",
+        uuid::Uuid::new_v4().simple(),
+        uuid::Uuid::new_v4().simple()
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use codewhale_config::OwnerRef;
+
+    fn call(plugin: &str, session: &str, method: &str, input: Value) -> BrokerCall {
+        let owner = OwnerRef {
+            plugin_id: plugin.into(),
+            generation: 1,
+            owner_token: "owner".into(),
+        };
+        BrokerCall {
+            context: super::super::dsh_broker::BrokerContext::detached_for_test(
+                &owner,
+                DshService::Remote,
+            ),
+            owner,
+            session_id: session.into(),
+            service: DshService::Remote,
+            method: method.into(),
+            input,
+        }
+    }
+
+    #[tokio::test]
+    async fn remote_grants_pair_present_redeem_once_and_revoke_bound_to_plugin_and_session() {
+        let grants = RemoteGrants::new(PAIRING_TTL, CLIENT_TTL);
+        let paired = grants
+            .serve(&call("a", "s1", "pair", json!({"label": "phone"})))
+            .unwrap();
+        let id = paired["grant"].as_str().unwrap().to_string();
+        assert_eq!(paired["state"], "awaiting_host");
+        assert!(!paired.to_string().contains(PAIRING_PREFIX));
+
+        let shown = grants.awaiting_host();
+        assert_eq!(shown.len(), 1);
+        assert_eq!(
+            (shown[0].plugin_id.as_str(), shown[0].session_id.as_str()),
+            ("a", "s1")
+        );
+        let client = grants.redeem(&shown[0].secret, "pixel").unwrap();
+        assert_eq!(client.session_id, "s1");
+        assert_eq!(
+            grants.redeem(&shown[0].secret, "pixel"),
+            Err(RemoteDenial::Replayed)
+        );
+        assert!(grants.awaiting_host().is_empty());
+        assert_eq!(grants.authorize(&client.token, "s1"), Ok(id.clone()));
+        assert_eq!(
+            grants.authorize(&client.token, "s2"),
+            Err(RemoteDenial::ForeignSession)
+        );
+
+        let listed = grants
+            .serve(&call("a", "s1", "clients", json!({})))
+            .unwrap();
+        assert_eq!(listed["clients"][0]["state"], "paired");
+        assert_eq!(listed["clients"][0]["client"], "pixel");
+        assert!(!listed.to_string().contains(CLIENT_PREFIX));
+        for (plugin, session) in [("b", "s1"), ("a", "s2")] {
+            assert_eq!(
+                grants
+                    .serve(&call(plugin, session, "clients", json!({})))
+                    .unwrap(),
+                json!({"clients": []})
+            );
+            assert!(matches!(
+                grants.serve(&call(plugin, session, "revoke", json!({"grant": id}))),
+                Err(BrokerRefusal::InvalidInput { .. })
+            ));
+        }
+        assert_eq!(grants.authorize(&client.token, "s1"), Ok(id.clone()));
+        assert_eq!(
+            grants
+                .serve(&call("a", "s1", "revoke", json!({"grant": id})))
+                .unwrap(),
+            json!({"grant": id, "revoked": true})
+        );
+        assert_eq!(
+            grants.authorize(&client.token, "s1"),
+            Err(RemoteDenial::Unknown)
+        );
+    }
+
+    #[tokio::test]
+    async fn remote_grants_refuse_stale_pairings_and_clients_and_cap_pending_pairings() {
+        let stale = RemoteGrants::new(Duration::ZERO, Duration::from_secs(60));
+        stale.serve(&call("a", "s", "pair", json!({}))).unwrap();
+        let secret = {
+            let grants = stale.grants.lock().unwrap();
+            grants.by_id.values().next().unwrap().pairing.clone()
+        };
+        assert!(stale.awaiting_host().is_empty());
+        assert_eq!(
+            stale.redeem(&secret.unwrap_or_default(), "x"),
+            Err(RemoteDenial::Unknown)
+        );
+
+        let expiring = RemoteGrants::new(Duration::from_secs(60), Duration::ZERO);
+        expiring.serve(&call("a", "s", "pair", json!({}))).unwrap();
+        let secret = expiring.awaiting_host()[0].secret.clone();
+        let client = expiring.redeem(&secret, "x").unwrap();
+        assert_eq!(
+            expiring.authorize(&client.token, "s"),
+            Err(RemoteDenial::Expired)
+        );
+
+        let capped = RemoteGrants::new(PAIRING_TTL, CLIENT_TTL);
+        for _ in 0..MAX_PENDING_PAIRINGS {
+            capped.serve(&call("a", "s", "pair", json!({}))).unwrap();
+        }
+        assert!(matches!(
+            capped.serve(&call("a", "s", "pair", json!({}))),
+            Err(BrokerRefusal::InvalidInput { .. })
+        ));
+        assert!(capped.serve(&call("b", "s", "pair", json!({}))).is_ok());
+        assert!(matches!(
+            capped.serve(&call("a", "s", "pair", json!({"label": "a\u{7}"}))),
+            Err(BrokerRefusal::InvalidInput { .. })
+        ));
+        assert_eq!(capped.revoke_session("s"), MAX_PENDING_PAIRINGS + 1);
+        assert!(capped.awaiting_host().is_empty());
+    }
+
+    #[tokio::test]
+    async fn remote_methods_decode_strictly_and_refuse_unknown_methods() {
+        let grants = RemoteGrants::new(PAIRING_TTL, CLIENT_TTL);
+        for method in ["listen", "tunnel", "expose", "anything"] {
+            assert!(matches!(
+                grants.serve(&call("a", "s", method, json!({}))),
+                Err(BrokerRefusal::UnknownMethod {
+                    service: DshService::Remote,
+                    ..
+                })
+            ));
+        }
+        for (method, input) in [
+            ("pair", json!({"label": 3})),
+            ("pair", json!({"label": "x", "public": true})),
+            ("revoke", json!({})),
+            ("status", Value::Null),
+        ] {
+            assert!(
+                matches!(
+                    grants.serve(&call("a", "s", method, input.clone())),
+                    Err(BrokerRefusal::InvalidInput { .. })
+                ),
+                "{method} {input}"
+            );
+        }
+        let status = grants.serve(&call("a", "s", "status", json!({}))).unwrap();
+        assert_eq!(status["public_listener"], false);
+        assert_eq!(status["transport"], "runtime_http_sse");
+    }
+}
@@ -0,0 +1,6 @@
+use super::dsh_broker::{BrokerCall, BrokerFuture, not_available};
+use super::protocol::DshService;
+
+pub(super) fn serve(_call: BrokerCall) -> BrokerFuture {
+    not_available(DshService::Settings)
+}
@@ -0,0 +1,524 @@
+use std::path::Path;
+
+use codewhale_agent_contract::worker_profile::ShellPolicy;
+use codewhale_workflow_js::ToolCallResponse;
+use serde::{Deserialize, Serialize};
+use serde_json::{Value, json};
+
+use super::dsh_broker::{BrokerCall, BrokerFuture, BrokerMethods, BrokerRefusal, decode};
+use super::protocol::DshService;
+use crate::tools::execution_envelope::enforce_tool_denial;
+
+const SUPPORTED: bool = cfg!(all(unix, not(target_env = "ohos")));
+const DEFAULT_SESSION: &str = "term-1";
+const MAX_SESSION_NAME: usize = 64;
+const MAX_COMMAND_BYTES: usize = 16 * 1024;
+const MAX_INPUT_BYTES: usize = 64 * 1024;
+const MAX_TIMEOUT_SECS: u64 = 600;
+const MAX_SETTLE_MS: u64 = 60_000;
+pub(super) const MAX_TERMINALS: usize = 8;
+const LOG: &str = "codewhale::dsh_terminal";
+
+static REGISTRY_GATE: tokio::sync::Semaphore = tokio::sync::Semaphore::const_new(4);
+
+#[derive(Deserialize)]
+#[serde(tag = "method", content = "input", deny_unknown_fields)]
+enum TerminalMethod {
+    #[serde(rename = "list")]
+    List(NoInput),
+    #[serde(rename = "run")]
+    Run(RunInput),
+    #[serde(rename = "send")]
+    Send(SendInput),
+    #[serde(rename = "wait")]
+    Wait(WaitInput),
+    #[serde(rename = "cancel")]
+    Cancel(SessionInput),
+    #[serde(rename = "reset")]
+    Reset(SessionInput),
+}
+
+impl BrokerMethods for TerminalMethod {
+    const NAMES: &'static [&'static str] = &["list", "run", "send", "wait", "cancel", "reset"];
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct NoInput {}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct RunInput {
+    command: String,
+    #[serde(default)]
+    session: Option<String>,
+    #[serde(default)]
+    timeout_secs: Option<u64>,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct SendInput {
+    session: String,
+    text: String,
+    #[serde(default)]
+    wait_ms: Option<u64>,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct WaitInput {
+    session: String,
+    #[serde(default)]
+    timeout_secs: Option<u64>,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct SessionInput {
+    session: String,
+}
+
+#[derive(Serialize)]
+struct Terminal {
+    terminal_id: String,
+    session: String,
+    state: String,
+    running: bool,
+    exit_code: Option<u32>,
+    updated_at: String,
+}
+
+struct Live {
+    instance: String,
+    terminals: Vec<Terminal>,
+}
+
+impl Live {
+    fn holds(&self, session: &str) -> bool {
+        self.terminals
+            .iter()
+            .any(|terminal| terminal.session == session)
+    }
+
+    fn existing(&self, session: &str) -> Result<(), BrokerRefusal> {
+        if self.holds(session) {
+            Ok(())
+        } else {
+            Err(invalid(
+                "this plugin has no live terminal with that name in this session; `list` reports the live ones",
+            ))
+        }
+    }
+}
+
+pub(super) fn serve(call: BrokerCall) -> BrokerFuture {
+    Box::pin(async move {
+        let method = decode::<TerminalMethod>(&call)?;
+        if call.context.cancel().is_cancelled() {
+            return Err(refused("the terminal call was withdrawn"));
+        }
+        match method {
+            TerminalMethod::List(NoInput {}) => {
+                let live = live(&call, "terminal/wait").await?;
+                tracing::info!(target: LOG, plugin = %call.owner.plugin_id, terminals = live.terminals.len(), "terminals listed");
+                Ok(json!({
+                    "instance": live.instance,
+                    "limit": MAX_TERMINALS,
+                    "terminals": live.terminals,
+                }))
+            }
+            TerminalMethod::Run(RunInput {
+                command,
+                session,
+                timeout_secs,
+            }) => {
+                let session = session_name(session.as_deref().unwrap_or(DEFAULT_SESSION))?;
+                if command.trim().is_empty()
+                    || command.len() > MAX_COMMAND_BYTES
+                    || command.contains('\0')
+                {
+                    return Err(invalid(format!(
+                        "a command is 1 to {MAX_COMMAND_BYTES} bytes with no NUL"
+                    )));
+                }
+                let timeout_secs = timeout(timeout_secs)?;
+                let live = live(&call, "terminal/run").await?;
+                if !live.holds(session) && live.terminals.len() >= MAX_TERMINALS {
+                    tracing::info!(target: LOG, plugin = %call.owner.plugin_id, "terminal limit reached");
+                    return Err(refused(
+                        "this plugin already holds the most terminals it may open in this session",
+                    ));
+                }
+                let mut input =
+                    json!({ "command": command, "session": owned_name(&call, session) });
+                if let Some(timeout_secs) = timeout_secs {
+                    input["timeout_secs"] = json!(timeout_secs);
+                }
+                nested(&call, "terminal/run", session, input).await
+            }
+            TerminalMethod::Send(SendInput {
+                session,
+                text,
+                wait_ms,
+            }) => {
+                let session = session_name(&session)?;
+                if text.is_empty() || text.len() > MAX_INPUT_BYTES {
+                    return Err(invalid(format!(
+                        "terminal input is 1 to {MAX_INPUT_BYTES} bytes"
+                    )));
+                }
+                if wait_ms.is_some_and(|wait_ms| wait_ms > MAX_SETTLE_MS) {
+                    return Err(invalid(format!("wait_ms is at most {MAX_SETTLE_MS}")));
+                }
+                live(&call, "terminal/send").await?.existing(session)?;
+                let mut input = json!({ "session": owned_name(&call, session), "text": text });
+                if let Some(wait_ms) = wait_ms {
+                    input["wait_ms"] = json!(wait_ms);
+                }
+                nested(&call, "terminal/send", session, input).await
+            }
+            TerminalMethod::Wait(WaitInput {
+                session,
+                timeout_secs,
+            }) => {
+                let session = session_name(&session)?;
+                let timeout_secs = timeout(timeout_secs)?;
+                live(&call, "terminal/wait").await?.existing(session)?;
+                let mut input = json!({ "session": owned_name(&call, session) });
+                if let Some(timeout_secs) = timeout_secs {
+                    input["timeout_secs"] = json!(timeout_secs);
+                }
+                nested(&call, "terminal/wait", session, input).await
+            }
+            TerminalMethod::Cancel(SessionInput { session }) => {
+                let session = session_name(&session)?;
+                live(&call, "terminal/cancel").await?.existing(session)?;
+                let input = json!({ "session": owned_name(&call, session) });
+                nested(&call, "terminal/cancel", session, input).await
+            }
+            TerminalMethod::Reset(SessionInput { session }) => {
+                let session = session_name(&session)?;
+                live(&call, "terminal/reset").await?.existing(session)?;
+                let input = json!({ "session": owned_name(&call, session) });
+                nested(&call, "terminal/reset", session, input).await
+            }
+        }
+    })
+}
+
+fn invalid(message: impl Into<String>) -> BrokerRefusal {
+    BrokerRefusal::InvalidInput {
+        service: DshService::Terminal,
+        message: message.into(),
+    }
+}
+
+fn refused(message: &str) -> BrokerRefusal {
+    BrokerRefusal::Refused {
+        service: DshService::Terminal,
+        message: message.to_string(),
+    }
+}
+
+fn session_name(name: &str) -> Result<&str, BrokerRefusal> {
+    let ok = !name.is_empty()
+        && name.len() <= MAX_SESSION_NAME
+        && name
+            .bytes()
+            .all(|b| b.is_ascii_alphanumeric() || matches!(b, b'_' | b'-' | b'.'));
+    if ok {
+        Ok(name)
+    } else {
+        Err(invalid(format!(
+            "a terminal name is 1 to {MAX_SESSION_NAME} letters, digits, `_`, `-` or `.`"
+        )))
+    }
+}
+
+fn timeout(secs: Option<u64>) -> Result<Option<u64>, BrokerRefusal> {
+    match secs {
+        Some(secs) if !(1..=MAX_TIMEOUT_SECS).contains(&secs) => Err(invalid(format!(
+            "timeout_secs is between 1 and {MAX_TIMEOUT_SECS}"
+        ))),
+        other => Ok(other),
+    }
+}
+
+fn prefix(plugin: &str) -> String {
+    format!("dsh:{plugin}:")
+}
+
+fn owned_name(call: &BrokerCall, session: &str) -> String {
+    format!("{}{session}", prefix(&call.owner.plugin_id))
+}
+
+async fn live(call: &BrokerCall, tool_name: &'static str) -> Result<Live, BrokerRefusal> {
+    if !SUPPORTED {
+        return Err(BrokerRefusal::NotAvailable(DshService::Terminal));
+    }
+    let mut tool = call.context.tool().clone();
+    let _ = tool.refresh_live_posture();
+    let needs_full = matches!(
+        tool_name,
+        "terminal/run" | "terminal/send" | "terminal/reset"
+    );
+    if !tool.shell_policy.allows_shell()
+        || (needs_full && tool.shell_policy != ShellPolicy::Full)
+        || enforce_tool_denial(&tool, tool_name, &json!({})).is_err()
+    {
+        tracing::info!(target: LOG, plugin = %call.owner.plugin_id, tool = tool_name, "terminal refused: the caller may not use this shell tool");
+        return Err(refused("terminals are not available to this caller"));
+    }
+    let workspace = tool.workspace.clone();
+    let owner = tool.state_namespace.clone();
+    let mine = prefix(&call.owner.plugin_id);
+    let read = async move {
+        let permit = REGISTRY_GATE.acquire().await.map_err(|_| ())?;
+        tokio::task::spawn_blocking(move || {
+            let _permit = permit;
+            owned(&workspace, &owner, &mine)
+        })
+        .await
+        .map_err(|_| ())?
+        .map_err(|error| {
+            tracing::warn!(target: LOG, %error, "terminal registry read failed");
+        })
+    };
+    tokio::select! {
+        biased;
+        () = call.context.cancel().cancelled() => Err(refused("the terminal call was withdrawn")),
+        live = read => live.map_err(|()| refused("the terminal registry could not be read")),
+    }
+}
+
+#[cfg(all(unix, not(target_env = "ohos")))]
+fn owned(workspace: &Path, owner: &str, mine: &str) -> Result<Live, String> {
+    use crate::tools::terminal_session;
+
+    let terminals = terminal_session::owned_sessions(workspace, owner)?
+        .into_iter()
+        .filter_map(|info| {
+            let session = info.name.strip_prefix(mine)?;
+            session_name(session).ok()?;
+            Some(Terminal {
+                session: session.to_string(),
+                state: match info.exit_code {
+                    Some(_) => "exited".to_string(),
+                    None => serde_json::to_value(info.state)
+                        .ok()
+                        .and_then(|state| state.as_str().map(str::to_owned))
+                        .unwrap_or_default(),
+                },
+                running: info.exit_code.is_none(),
+                exit_code: info.exit_code,
+                terminal_id: info.id,
+                updated_at: info.updated_at,
+            })
+        })
+        .collect();
+    Ok(Live {
+        instance: terminal_session::instance_id().to_string(),
+        terminals,
+    })
+}
+
+#[cfg(not(all(unix, not(target_env = "ohos"))))]
+fn owned(_workspace: &Path, _owner: &str, _mine: &str) -> Result<Live, String> {
+    Err("terminal sessions are not supported on this platform".to_string())
+}
+
+async fn nested(
+    call: &BrokerCall,
+    tool: &'static str,
+    session: &str,
+    input: Value,
+) -> Result<Value, BrokerRefusal> {
+    let plugin = &call.owner.plugin_id;
+    match call.context.core_call(tool, input).await {
+        Ok(response) => {
+            tracing::info!(target: LOG, %plugin, tool, session, ok = response.ok, "terminal call ran through the gate");
+            Ok(outcome(session, response))
+        }
+        Err(refusal) => {
+            let code = refusal.code();
+            let detail = match &refusal {
+                BrokerRefusal::Denied { message, .. } | BrokerRefusal::Refused { message, .. } => {
+                    message.as_str()
+                }
+                _ => "",
+            };
+            tracing::info!(target: LOG, %plugin, tool, session, code, detail, "terminal call not run");
+            Err(match refusal {
+                BrokerRefusal::Denied { .. } => BrokerRefusal::Denied {
+                    service: DshService::Terminal,
+                    message: "the terminal call was denied".to_string(),
+                },
+                _ => refused("the terminal call was refused"),
+            })
+        }
+    }
+}
+
+fn text(value: &Value) -> String {
+    match value {
+        Value::String(text) => text.clone(),
+        Value::Null => String::new(),
+        other => other.to_string(),
+    }
+}
+
+fn outcome(session: &str, response: ToolCallResponse) -> Value {
+    if !response.ok {
+        return json!({ "ok": false, "session": session, "output": text(&response.result) });
+    }
+    let metadata = &response.result["metadata"];
+    json!({
+        "ok": true,
+        "session": session,
+        "output": text(&response.result["content"]),
+        "truncated": !response.result["truncated"].is_null(),
+        "status": metadata["status"],
+        "exit_code": metadata["exit_code"],
+        "cwd": metadata["cwd"],
+        "terminal_id": metadata["terminal_session_id"],
+        "state": metadata["terminal_state"],
+        "previous_terminal_id": metadata["previous_session_id"],
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::super::dsh_broker::BrokerContext;
+    use super::*;
+    use codewhale_config::OwnerRef;
+
+    fn call(owner: &OwnerRef, method: &str, input: Value) -> BrokerCall {
+        BrokerCall {
+            owner: owner.clone(),
+            session_id: "session".into(),
+            service: DshService::Terminal,
+            method: method.into(),
+            input,
+            context: BrokerContext::detached_for_test(owner, DshService::Terminal),
+        }
+    }
+
+    fn owner() -> OwnerRef {
+        OwnerRef {
+            plugin_id: "a".into(),
+            generation: 1,
+            owner_token: "t".into(),
+        }
+    }
+
+    #[tokio::test]
+    async fn terminal_methods_decode_strictly_and_bound_every_input_before_anything_runs() {
+        let owner = owner();
+        for method in ["spawn", "open", "kill", "resize", "read", "exec", "core"] {
+            let refusal = serve(call(&owner, method, json!({}))).await.unwrap_err();
+            assert_eq!(refusal.code(), "unknown_method", "{method}");
+        }
+        let long_name = "n".repeat(MAX_SESSION_NAME + 1);
+        let long_command = "c".repeat(MAX_COMMAND_BYTES + 1);
+        let long_text = "t".repeat(MAX_INPUT_BYTES + 1);
+        for (method, input) in [
+            ("list", json!({ "workspace": "/" })),
+            ("run", json!({})),
+            ("run", json!({ "command": "" })),
+            ("run", json!({ "command": "  \n" })),
+            ("run", json!({ "command": "a\u{0}b" })),
+            ("run", json!({ "command": long_command })),
+            ("run", json!({ "command": "true", "session": "" })),
+            ("run", json!({ "command": "true", "session": "../term-1" })),
+            ("run", json!({ "command": "true", "session": "dsh:b:x" })),
+            ("run", json!({ "command": "true", "session": long_name })),
+            ("run", json!({ "command": "true", "timeout_secs": 0 })),
+            ("run", json!({ "command": "true", "timeout_secs": 601 })),
+            (
+                "run",
+                json!({ "command": "true", "sandbox_permissions": "danger" }),
+            ),
+            ("run", json!({ "command": "true", "name": "exec_shell" })),
+            ("send", json!({ "session": "x" })),
+            ("send", json!({ "session": "x", "text": "" })),
+            ("send", json!({ "session": "x", "text": long_text })),
+            (
+                "send",
+                json!({ "session": "x", "text": "y", "wait_ms": 60_001 }),
+            ),
+            ("wait", json!({ "session": "x", "timeout_secs": 601 })),
+            ("wait", json!({})),
+            ("cancel", json!({ "session": "a b" })),
+            ("reset", json!({ "session": "x", "force": true })),
+        ] {
+            let refusal = serve(call(&owner, method, input.clone()))
+                .await
+                .unwrap_err();
+            assert_eq!(refusal.code(), "invalid_input", "{method} {input}");
+        }
+    }
+
+    #[tokio::test]
+    async fn a_terminal_call_whose_cancel_has_fired_has_no_effect() {
+        let owner = owner();
+        let fired = call(&owner, "run", json!({ "command": "true" }));
+        fired.context.cancel().cancel();
+        let refusal = serve(fired).await.unwrap_err();
+        assert_eq!(refusal.code(), "refused");
+    }
+
+    #[test]
+    fn terminal_names_are_scoped_to_the_plugin_and_a_result_is_a_typed_projection() {
+        assert_eq!(prefix("a"), "dsh:a:");
+        assert!(
+            "dsh:a:b:x"
+                .strip_prefix(&prefix("a"))
+                .is_some_and(|rest| session_name(rest).is_err())
+        );
+        let ran = outcome(
+            "build",
+            ToolCallResponse {
+                ok: true,
+                result: json!({
+                    "content": 42,
+                    "truncated": null,
+                    "metadata": {
+                        "status": "completed",
+                        "exit_code": 0,
+                        "cwd": "/w",
+                        "terminal_session_id": "id-1",
+                        "terminal_state": "idle",
+                        "state_path": "/private/state.json",
+                    },
+                }),
+            },
+        );
+        assert_eq!(
+            ran,
+            json!({
+                "ok": true,
+                "session": "build",
+                "output": "42",
+                "truncated": false,
+                "status": "completed",
+                "exit_code": 0,
+                "cwd": "/w",
+                "terminal_id": "id-1",
+                "state": "idle",
+                "previous_terminal_id": null,
+            })
+        );
+        let failed = outcome(
+            "build",
+            ToolCallResponse {
+                ok: false,
+                result: json!("boom"),
+            },
+        );
+        assert_eq!(
+            failed,
+            json!({ "ok": false, "session": "build", "output": "boom" })
+        );
+    }
+}
@@ -0,0 +1,713 @@
+use std::path::{Path, PathBuf};
+
+use codewhale_workflow_js::ToolCallResponse;
+use serde::Deserialize;
+use serde_json::{Value, json};
+
+use super::dsh_broker::{BrokerCall, BrokerFuture, BrokerMethods, BrokerRefusal, decode};
+use super::protocol::DshService;
+use crate::tools::execution_envelope::enforce_tool_denial;
+use crate::tools::spec::{ToolContext, resolve_strict_authority_path};
+
+const MAX_PATH_BYTES: usize = 512;
+const MAX_WRITE_BYTES: usize = 1024 * 1024;
+const MAX_READ_LINES: u64 = 10_000;
+const MAX_ARGS: usize = 8;
+const MAX_ARG_BYTES: usize = 1024;
+const PROTECTED: &[&str] = &[".git", ".codewhale"];
+const LOG: &str = "codewhale::dsh_workspace";
+
+static CONFINE_GATE: tokio::sync::Semaphore = tokio::sync::Semaphore::const_new(4);
+
+#[derive(Deserialize)]
+#[serde(tag = "method", content = "input", deny_unknown_fields)]
+enum WorkspaceMethod {
+    #[serde(rename = "read")]
+    Read(ReadInput),
+    #[serde(rename = "list")]
+    List(ListInput),
+    #[serde(rename = "write")]
+    Write(WriteInput),
+    #[serde(rename = "exec")]
+    Exec(ExecInput),
+}
+
+impl BrokerMethods for WorkspaceMethod {
+    const NAMES: &'static [&'static str] = &["read", "list", "write", "exec"];
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct ReadInput {
+    path: String,
+    #[serde(default)]
+    start_line: Option<u64>,
+    #[serde(default)]
+    max_lines: Option<u64>,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct ListInput {
+    #[serde(default)]
+    path: Option<String>,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct WriteInput {
+    path: String,
+    content: String,
+    #[serde(default)]
+    expected_hash: Option<String>,
+}
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+struct ExecInput {
+    argv: Vec<String>,
+    #[serde(default)]
+    cwd: Option<String>,
+}
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+enum Access {
+    Read,
+    Overlay,
+}
+
+pub(super) fn serve(call: BrokerCall) -> BrokerFuture {
+    Box::pin(async move {
+        let method = decode::<WorkspaceMethod>(&call)?;
+        if call.context.cancel().is_cancelled() {
+            return Err(refused("the workspace call was withdrawn"));
+        }
+        match method {
+            WorkspaceMethod::Read(ReadInput {
+                path,
+                start_line,
+                max_lines,
+            }) => {
+                if start_line == Some(0) {
+                    return Err(invalid("start_line starts at 1"));
+                }
+                if max_lines.is_some_and(|lines| !(1..=MAX_READ_LINES).contains(&lines)) {
+                    return Err(invalid(format!(
+                        "max_lines is between 1 and {MAX_READ_LINES}"
+                    )));
+                }
+                let tool = caller(&call, "read_file")?;
+                let (shown, resolved) = confine(&call, &tool, &path, Access::Read).await?;
+                let mut input = json!({ "path": resolved });
+                if let Some(start_line) = start_line {
+                    input["start_line"] = json!(start_line);
+                }
+                if let Some(max_lines) = max_lines {
+                    input["max_lines"] = json!(max_lines);
+                }
+                nested(&call, "read_file", input)
+                    .await
+                    .map(|response| file_outcome(&shown, response))
+            }
+            WorkspaceMethod::List(ListInput { path }) => {
+                let tool = caller(&call, "list_dir")?;
+                let raw = path.as_deref().unwrap_or(".");
+                let (shown, resolved) = confine(&call, &tool, raw, Access::Read).await?;
+                nested(&call, "list_dir", json!({ "path": resolved }))
+                    .await
+                    .map(|response| file_outcome(&shown, response))
+            }
+            WorkspaceMethod::Write(WriteInput {
+                path,
+                content,
+                expected_hash,
+            }) => {
+                if content.len() > MAX_WRITE_BYTES {
+                    return Err(invalid(format!(
+                        "a write is at most {MAX_WRITE_BYTES} bytes"
+                    )));
+                }
+                if expected_hash
+                    .as_deref()
+                    .is_some_and(|hash| hash.is_empty() || hash.len() > 128)
+                {
+                    return Err(invalid("expected_hash is 1 to 128 characters"));
+                }
+                if !overlay_granted() {
+                    tracing::info!(target: LOG, plugin = %call.owner.plugin_id, "workspace write refused: no reviewed overlay grant");
+                    return Err(refused("this plugin may not write to the workspace"));
+                }
+                let tool = caller(&call, "write_file")?;
+                let (shown, resolved) = confine(&call, &tool, &path, Access::Overlay).await?;
+                let mut input = json!({ "path": resolved, "content": content });
+                if let Some(expected_hash) = expected_hash {
+                    input["expected_hash"] = json!(expected_hash);
+                }
+                nested(&call, "write_file", input)
+                    .await
+                    .map(|response| file_outcome(&shown, response))
+            }
+            WorkspaceMethod::Exec(ExecInput { argv, cwd }) => {
+                let query = literal_git(&argv)?;
+                let tool = caller(&call, "Git")?;
+                if let Some(cwd) = cwd.as_deref() {
+                    let (shown, _) = confine(&call, &tool, cwd, Access::Read).await?;
+                    if shown != "." {
+                        tracing::info!(target: LOG, plugin = %call.owner.plugin_id, "workspace exec refused: cwd is not the workspace root");
+                        return Err(refused("git runs only at the workspace root"));
+                    }
+                }
+                let mut input = query;
+                input["action"] = json!("review_scope");
+                nested(&call, "Git", input).await.map(exec_outcome)
+            }
+        }
+    })
+}
+
+fn invalid(message: impl Into<String>) -> BrokerRefusal {
+    BrokerRefusal::InvalidInput {
+        service: DshService::Workspace,
+        message: message.into(),
+    }
+}
+
+fn refused(message: &str) -> BrokerRefusal {
+    BrokerRefusal::Refused {
+        service: DshService::Workspace,
+        message: message.to_string(),
+    }
+}
+
+#[cfg(test)]
+thread_local! {
+    static TEST_OVERLAY: std::cell::Cell<bool> = const { std::cell::Cell::new(false) };
+}
+
+#[cfg(test)]
+pub(super) struct TestOverlay(bool);
+
+#[cfg(test)]
+impl TestOverlay {
+    pub(super) fn granted() -> Self {
+        Self(TEST_OVERLAY.with(|overlay| overlay.replace(true)))
+    }
+}
+
+#[cfg(test)]
+impl Drop for TestOverlay {
+    fn drop(&mut self) {
+        TEST_OVERLAY.with(|overlay| overlay.set(self.0));
+    }
+}
+
+fn overlay_granted() -> bool {
+    #[cfg(test)]
+    if TEST_OVERLAY.with(std::cell::Cell::get) {
+        return true;
+    }
+    false
+}
+
+fn caller(call: &BrokerCall, tool_name: &'static str) -> Result<ToolContext, BrokerRefusal> {
+    let mut tool = call.context.tool().clone();
+    let _ = tool.refresh_live_posture();
+    if enforce_tool_denial(&tool, tool_name, &json!({})).is_err() {
+        tracing::info!(target: LOG, plugin = %call.owner.plugin_id, tool = tool_name, "workspace refused: the caller may not use this tool");
+        return Err(refused(
+            "this workspace call is not available to this caller",
+        ));
+    }
+    Ok(tool)
+}
+
+fn relative(workspace: &Path, raw: &str) -> Option<String> {
+    let path = Path::new(raw);
+    if !path.is_absolute() {
+        return Some(raw.to_string());
+    }
+    let canonical = workspace.canonicalize().ok();
+    let rest = path.strip_prefix(workspace).ok().or_else(|| {
+        canonical
+            .as_deref()
+            .and_then(|root| path.strip_prefix(root).ok())
+    })?;
+    let rest = rest.to_str()?;
+    Some(if rest.is_empty() {
+        ".".into()
+    } else {
+        rest.into()
+    })
+}
+
+fn shape(raw: &str) -> Result<(), BrokerRefusal> {
+    if raw.is_empty()
+        || raw.len() > MAX_PATH_BYTES
+        || raw.trim() != raw
+        || raw.chars().any(char::is_control)
+    {
+        return Err(invalid(format!(
+            "a path is 1 to {MAX_PATH_BYTES} bytes on one line with no surrounding spaces"
+        )));
+    }
+    Ok(())
+}
+
+fn protected(relative: &str) -> bool {
+    relative.replace('\\', "/").split('/').any(|segment| {
+        PROTECTED
+            .iter()
+            .any(|name| segment.eq_ignore_ascii_case(name))
+    })
+}
+
+fn resolve(tool: &ToolContext, raw: &str, access: Access) -> Result<(String, PathBuf), String> {
+    let relative = relative(&tool.workspace, raw).ok_or_else(|| "outside".to_string())?;
+    let resolved = resolve_strict_authority_path(tool, &relative).map_err(|e| e.to_string())?;
+    let root = tool.workspace.canonicalize().map_err(|e| e.to_string())?;
+    let shown = resolved
+        .strip_prefix(&root)
+        .map_err(|_| "outside".to_string())?
+        .to_str()
+        .ok_or_else(|| "not UTF-8".to_string())?
+        .replace('\\', "/");
+    let shown = if shown.is_empty() { ".".into() } else { shown };
+    if access == Access::Overlay && (shown == "." || protected(&shown)) {
+        return Err(format!("overlay excludes {shown}"));
+    }
+    Ok((shown, resolved))
+}
+
+async fn confine(
+    call: &BrokerCall,
+    tool: &ToolContext,
+    raw: &str,
+    access: Access,
+) -> Result<(String, String), BrokerRefusal> {
+    shape(raw)?;
+    let owned = tool.clone();
+    let raw_owned = raw.to_string();
+    let work = async move {
+        let permit = CONFINE_GATE
+            .acquire()
+            .await
+            .map_err(|_| "closed".to_string())?;
+        tokio::task::spawn_blocking(move || {
+            let _permit = permit;
+            resolve(&owned, &raw_owned, access)
+        })
+        .await
+        .map_err(|error| error.to_string())?
+    };
+    let resolved = tokio::select! {
+        biased;
+        () = call.context.cancel().cancelled() => return Err(refused("the workspace call was withdrawn")),
+        resolved = work => resolved,
+    };
+    match resolved {
+        Ok((shown, path)) => {
+            let path = path
+                .to_str()
+                .ok_or_else(|| refused("that path is not available to this plugin"))?
+                .to_string();
+            Ok((shown, path))
+        }
+        Err(detail) => {
+            tracing::info!(target: LOG, plugin = %call.owner.plugin_id, %detail, "workspace path refused");
+            Err(refused("that path is not available to this plugin"))
+        }
+    }
+}
+
+fn literal_git(argv: &[String]) -> Result<Value, BrokerRefusal> {
+    if argv.is_empty()
+        || argv.len() > MAX_ARGS + 1
+        || argv
+            .iter()
+            .any(|arg| arg.len() > MAX_ARG_BYTES || arg.chars().any(char::is_control))
+    {
+        return Err(invalid(format!(
+            "argv is 1 to {} strings of at most {MAX_ARG_BYTES} bytes with no control characters",
+            MAX_ARGS + 1
+        )));
+    }
+    let refuse = || {
+        tracing::info!(target: LOG, program = %argv[0].chars().take(64).collect::<String>(), "workspace exec refused: not a literal read-only git command");
+        refused("only read-only git metadata commands run for plugins")
+    };
+    if argv[0] != "git" {
+        return Err(refuse());
+    }
+    let args: Vec<&str> = argv[1..].iter().map(String::as_str).collect();
+    let args = match args.split_first() {
+        Some((&"--no-optional-locks", rest)) => rest,
+        _ => &args[..],
+    };
+    let query = match args {
+        ["for-each-ref", "--format=%(refname:short)", "refs/heads"] => {
+            json!({ "query": "branches" })
+        }
+        ["log", "-n", "100", "--format=%H%x09%s"] => json!({ "query": "commits" }),
+        ["rev-parse", "--show-toplevel"] => json!({ "query": "root" }),
+        ["rev-parse", "--verify", "--end-of-options", rev] => {
+            json!({ "query": "resolve", "rev": rev })
+        }
+        ["rev-list", "--left-right", "--count", range] => match range.split_once("...") {
+            Some((ours, theirs)) if !theirs.contains("...") => {
+                json!({ "query": "ahead_behind", "ours": ours, "theirs": theirs })
+            }
+            _ => return Err(refuse()),
+        },
+        ["merge-base", ours, theirs] => {
+            json!({ "query": "merge_base", "ours": ours, "theirs": theirs })
+        }
+        _ => return Err(refuse()),
+    };
+    Ok(query)
+}
+
+async fn nested(
+    call: &BrokerCall,
+    tool: &'static str,
+    input: Value,
+) -> Result<ToolCallResponse, BrokerRefusal> {
+    let plugin = &call.owner.plugin_id;
+    match call.context.core_call(tool, input).await {
+        Ok(response) => {
+            tracing::info!(target: LOG, %plugin, tool, ok = response.ok, "workspace call ran through the gate");
+            Ok(response)
+        }
+        Err(refusal) => {
+            let code = refusal.code();
+            let detail = match &refusal {
+                BrokerRefusal::Denied { message, .. } | BrokerRefusal::Refused { message, .. } => {
+                    message.as_str()
+                }
+                _ => "",
+            };
+            tracing::info!(target: LOG, %plugin, tool, code, detail, "workspace call not run");
+            Err(match refusal {
+                BrokerRefusal::Denied { .. } => BrokerRefusal::Denied {
+                    service: DshService::Workspace,
+                    message: "the workspace call was denied".to_string(),
+                },
+                _ => refused("the workspace call was refused"),
+            })
+        }
+    }
+}
+
+fn text(value: &Value) -> String {
+    match value {
+        Value::String(text) => text.clone(),
+        Value::Null => String::new(),
+        other => other.to_string(),
+    }
+}
+
+fn file_outcome(path: &str, response: ToolCallResponse) -> Value {
+    if !response.ok {
+        return json!({ "ok": false, "path": path, "output": text(&response.result) });
+    }
+    json!({
+        "ok": true,
+        "path": path,
+        "output": text(&response.result["content"]),
+        "truncated": !response.result["truncated"].is_null(),
+    })
+}
+
+fn exec_outcome(response: ToolCallResponse) -> Value {
+    if !response.ok {
+        return json!({ "ok": false, "stdout": "", "stderr": text(&response.result), "exit_code": null });
+    }
+    let parsed = serde_json::from_str::<Value>(&text(&response.result["content"]))
+        .ok()
+        .filter(|value| value["stdout"].is_string() && value["stderr"].is_string());
+    match parsed {
+        Some(value) => json!({
+            "ok": value["exit_code"] == json!(0),
+            "stdout": value["stdout"],
+            "stderr": value["stderr"],
+            "exit_code": value["exit_code"],
+        }),
+        None => json!({
+            "ok": false,
+            "stdout": "",
+            "stderr": "git output exceeded what a plugin call returns",
+            "exit_code": null,
+        }),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::super::dsh_broker::BrokerContext;
+    use super::*;
+    use codewhale_config::OwnerRef;
+
+    fn call(owner: &OwnerRef, method: &str, input: Value) -> BrokerCall {
+        BrokerCall {
+            owner: owner.clone(),
+            session_id: "session".into(),
+            service: DshService::Workspace,
+            method: method.into(),
+            input,
+            context: BrokerContext::detached_for_test(owner, DshService::Workspace),
+        }
+    }
+
+    fn owner() -> OwnerRef {
+        OwnerRef {
+            plugin_id: "a".into(),
+            generation: 1,
+            owner_token: "t".into(),
+        }
+    }
+
+    fn argv(args: &[&str]) -> Vec<String> {
+        args.iter().map(|arg| (*arg).to_string()).collect()
+    }
+
+    #[tokio::test]
+    async fn workspace_methods_decode_strictly_and_bound_every_input_before_anything_runs() {
+        let owner = owner();
+        for method in ["delete", "rename", "spawn", "shell", "watch", "core", "Git"] {
+            let refusal = serve(call(&owner, method, json!({}))).await.unwrap_err();
+            assert_eq!(refusal.code(), "unknown_method", "{method}");
+        }
+        let long_path = "p".repeat(MAX_PATH_BYTES + 1);
+        let long_content = "c".repeat(MAX_WRITE_BYTES + 1);
+        for (method, input) in [
+            ("read", json!({})),
+            ("read", json!({ "path": "" })),
+            ("read", json!({ "path": " x" })),
+            ("read", json!({ "path": "a\nb" })),
+            ("read", json!({ "path": long_path })),
+            ("read", json!({ "path": "x", "start_line": 0 })),
+            ("read", json!({ "path": "x", "max_lines": 0 })),
+            (
+                "read",
+                json!({ "path": "x", "max_lines": MAX_READ_LINES + 1 }),
+            ),
+            ("read", json!({ "path": "x", "follow_symlinks": true })),
+            ("list", json!({ "path": "x", "recursive": true })),
+            ("write", json!({ "path": "x" })),
+            ("write", json!({ "path": "x", "content": long_content })),
+            (
+                "write",
+                json!({ "path": "x", "content": "", "expected_hash": "" }),
+            ),
+            ("write", json!({ "path": "x", "content": "", "mode": 493 })),
+            ("exec", json!({})),
+            ("exec", json!({ "argv": [] })),
+            ("exec", json!({ "argv": ["git", "a\u{0}b"] })),
+            ("exec", json!({ "argv": ["git"], "env": {} })),
+            ("exec", json!({ "argv": ["git"], "shell": true })),
+        ] {
+            let refusal = serve(call(&owner, method, input.clone()))
+                .await
+                .unwrap_err();
+            assert_eq!(refusal.code(), "invalid_input", "{method} {input}");
+        }
+    }
+
+    #[tokio::test]
+    async fn a_workspace_call_whose_cancel_has_fired_has_no_effect() {
+        let owner = owner();
+        let _overlay = TestOverlay::granted();
+        for (method, input) in [
+            ("read", json!({ "path": "x" })),
+            ("list", json!({})),
+            ("write", json!({ "path": "x", "content": "y" })),
+            (
+                "exec",
+                json!({ "argv": ["git", "rev-parse", "--show-toplevel"] }),
+            ),
+        ] {
+            let fired = call(&owner, method, input);
+            fired.context.cancel().cancel();
+            let refusal = serve(fired).await.unwrap_err();
+            assert_eq!(refusal.code(), "refused", "{method}");
+        }
+    }
+
+    #[tokio::test]
+    async fn a_write_without_the_reviewed_overlay_grant_is_refused_before_any_path_is_read() {
+        let owner = owner();
+        let refusal = serve(call(
+            &owner,
+            "write",
+            json!({ "path": "x", "content": "y" }),
+        ))
+        .await
+        .unwrap_err();
+        assert_eq!(refusal.code(), "refused");
+        assert_eq!(
+            refusal.wire().message,
+            "this plugin may not write to the workspace"
+        );
+    }
+
+    #[test]
+    fn only_literal_read_only_git_metadata_argv_maps_to_the_git_tool() {
+        for (args, expected) in [
+            (
+                argv(&["git", "rev-parse", "--show-toplevel"]),
+                json!({ "query": "root" }),
+            ),
+            (
+                argv(&[
+                    "git",
+                    "--no-optional-locks",
+                    "for-each-ref",
+                    "--format=%(refname:short)",
+                    "refs/heads",
+                ]),
+                json!({ "query": "branches" }),
+            ),
+            (
+                argv(&["git", "log", "-n", "100", "--format=%H%x09%s"]),
+                json!({ "query": "commits" }),
+            ),
+            (
+                argv(&["git", "rev-parse", "--verify", "--end-of-options", "main"]),
+                json!({ "query": "resolve", "rev": "main" }),
+            ),
+            (
+                argv(&["git", "rev-list", "--left-right", "--count", "a...b"]),
+                json!({ "query": "ahead_behind", "ours": "a", "theirs": "b" }),
+            ),
+            (
+                argv(&["git", "merge-base", "a", "b"]),
+                json!({ "query": "merge_base", "ours": "a", "theirs": "b" }),
+            ),
+        ] {
+            assert_eq!(literal_git(&args).unwrap(), expected, "{args:?}");
+        }
+        for args in [
+            argv(&["sh", "-c", "git status"]),
+            argv(&["/usr/bin/git", "rev-parse", "--show-toplevel"]),
+            argv(&["git"]),
+            argv(&["git", "status"]),
+            argv(&["git", "rev-parse", "--show-toplevel", "--git-dir"]),
+            argv(&[
+                "git",
+                "-c",
+                "core.fsmonitor=x",
+                "rev-parse",
+                "--show-toplevel",
+            ]),
+            argv(&[
+                "git",
+                "--no-optional-locks",
+                "--no-optional-locks",
+                "rev-parse",
+                "--show-toplevel",
+            ]),
+            argv(&["git", "log", "-n", "100", "--format=%H%x09%s", "-p"]),
+            argv(&["git", "rev-list", "--left-right", "--count", "a..b"]),
+            argv(&["git", "rev-list", "--left-right", "--count", "a...b...c"]),
+            argv(&["git", "push", "origin", "main"]),
+            argv(&["git", "config", "core.hooksPath", "/tmp"]),
+        ] {
+            assert_eq!(
+                literal_git(&args).unwrap_err().code(),
+                "refused",
+                "{args:?}"
+            );
+        }
+        let too_many = vec!["git".to_string(); MAX_ARGS + 2];
+        assert_eq!(literal_git(&too_many).unwrap_err().code(), "invalid_input");
+    }
+
+    #[test]
+    fn paths_are_confined_to_the_workspace_and_the_overlay_excludes_its_internals() {
+        let dir = tempfile::tempdir().unwrap();
+        let root = dir.path().canonicalize().unwrap();
+        std::fs::create_dir_all(root.join("src")).unwrap();
+        std::fs::write(root.join("src/a.txt"), "a").unwrap();
+        let tool = ToolContext::new(&root);
+        let read = |raw: &str| resolve(&tool, raw, Access::Read).map(|(shown, _)| shown);
+        let write = |raw: &str| resolve(&tool, raw, Access::Overlay).map(|(shown, _)| shown);
+
+        assert_eq!(read("src/a.txt").unwrap(), "src/a.txt");
+        assert_eq!(read("./src//a.txt").unwrap(), "src/a.txt");
+        assert_eq!(
+            read(root.join("src/a.txt").to_str().unwrap()).unwrap(),
+            "src/a.txt"
+        );
+        assert_eq!(read(root.to_str().unwrap()).unwrap(), ".");
+        assert_eq!(read(".").unwrap(), ".");
+        assert_eq!(write("src/new/b.txt").unwrap(), "src/new/b.txt");
+
+        let outside = tempfile::tempdir().unwrap();
+        for raw in [
+            "../x",
+            "src/../../x",
+            outside.path().to_str().unwrap(),
+            "/etc/passwd",
+        ] {
+            assert!(read(raw).is_err(), "{raw}");
+            assert!(write(raw).is_err(), "{raw}");
+        }
+        for raw in [
+            ".",
+            ".git/config",
+            ".GIT/hooks/pre-commit",
+            "src/.git",
+            ".codewhale/x",
+        ] {
+            assert!(write(raw).is_err(), "{raw}");
+        }
+        assert_eq!(read(".git/HEAD").unwrap(), ".git/HEAD");
+    }
+
+    #[cfg(unix)]
+    #[test]
+    fn a_symlink_anywhere_on_the_path_is_refused_even_when_it_points_inside() {
+        let dir = tempfile::tempdir().unwrap();
+        let root = dir.path().canonicalize().unwrap();
+        let outside = tempfile::tempdir().unwrap();
+        std::fs::write(outside.path().join("secret"), "s").unwrap();
+        std::fs::create_dir_all(root.join("src")).unwrap();
+        std::fs::write(root.join("src/a.txt"), "a").unwrap();
+        std::os::unix::fs::symlink(outside.path(), root.join("out")).unwrap();
+        std::os::unix::fs::symlink(root.join("src"), root.join("in")).unwrap();
+        std::os::unix::fs::symlink(root.join("src/a.txt"), root.join("link.txt")).unwrap();
+        let tool = ToolContext::new(&root);
+        for raw in ["out/secret", "out", "in/a.txt", "link.txt", "out/new.txt"] {
+            assert!(resolve(&tool, raw, Access::Read).is_err(), "{raw}");
+            assert!(resolve(&tool, raw, Access::Overlay).is_err(), "{raw}");
+        }
+    }
+
+    #[test]
+    fn results_are_typed_projections() {
+        let read = file_outcome(
+            "src/a.txt",
+            ToolCallResponse {
+                ok: true,
+                result: json!({ "content": "1: a", "truncated": null, "metadata": { "path": "/private" } }),
+            },
+        );
+        assert_eq!(
+            read,
+            json!({ "ok": true, "path": "src/a.txt", "output": "1: a", "truncated": false })
+        );
+        let ran = exec_outcome(ToolCallResponse {
+            ok: true,
+            result: json!({ "content": json!({ "stdout": "/w\n", "stderr": "", "exit_code": 0 }).to_string() }),
+        });
+        assert_eq!(
+            ran,
+            json!({ "ok": true, "stdout": "/w\n", "stderr": "", "exit_code": 0 })
+        );
+        let cut = exec_outcome(ToolCallResponse {
+            ok: true,
+            result: json!({ "content": "{\"stdout\": \"/w [output truncated" }),
+        });
+        assert_eq!(cut["ok"], false);
+        assert_eq!(cut["exit_code"], Value::Null);
+    }
+}