Main builds again: one Attack arm in the hub, anticheat first, then the queued-move break

#5123 added a second S::Attack arm after the anticheat's, so clippy -D warnings fails on main (unreachable pattern) and its queued-move break never ran. The break now sits in the anticheat's arm, after an attack it forwards. Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-11-10 10:31:29 -10:00 · 2026-10-31 18:20:43 +01:00
2210 changed files with 34080 additions and 662692 deletions
@@ -47,7 +47,7 @@ line are in the output) and the Rust fn before changing anything.
  That one line is what makes the next agent find it.
 - Fix the path players run: single player is a client of the integrated server, so server logic lives in
  `game/lan*.rs` and `src/lan/`, and what only the client's copy shows (particles, local sounds, hand
-  animation) must be reached from `game/remote*.rs`.
+  animation) must be reached from `game/remote*.rs`. A fix on the old in-frame path alone fixes nothing.
 - Look at the neighbours the ledger lists for the same class: a `client` or `seam` gap next to your fix is
  usually the same bug on the other path.

@@ -7,4 +7,3 @@ kacpherek    # added by Ludovic, 2026-10-27
 rdbtCVS      # added by Ludovic, 2026-10-27
 Online5277   # added by Ludovic, 2026-10-27 (his top three by merged pull requests)
 levzzz5154   # added by Ludovic, 2026-10-28 (Horizon Team; author of horizon-mixins)
-Qwerner88880 # added by Ludovic, 2026-10-31 (Discord vladislav_hagen; native-mod hooks)
@@ -9,9 +9,7 @@ permissions:
  actions: write
 jobs:
  cancel:
-    # One of our small runners (horizon-light), out of GitHub's pool: no checkout, no code of the pull request
-    # (docs/ci-runners.md). SELF_HOSTED_CI=off: GitHub's runners.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    steps:
      - name: Cancel the pull request's unfinished runs
        env:
@@ -1,107 +0,0 @@
-name: cargo-horizon-mod
-# `cargo binstall --git https://github.com/horizon-rust/horizon cargo-horizon-mod` (#2120): binstall reads
-# [package.metadata.binstall] from crates/cargo-horizon-mod/Cargo.toml and downloads the archive this workflow
-# attaches to the tag `cargo-horizon-mod-v<version>`, whose version must be the manifest's. The targets come from
-# tools/horizon_mod_binstall.py, the same file the manifest's template is checked against, so a platform added there
-# is built here and one nobody publishes is caught before it ships. A pull request builds the archives and publishes
-# nothing.
-on:
-  push:
-    tags: ['cargo-horizon-mod-v*']
-  pull_request:
-    paths:
-      - 'crates/cargo-horizon-mod/**'
-      - 'tools/horizon_mod_binstall.py'
-      - '.github/workflows/cargo-horizon-mod.yml'
-permissions:
-  contents: read
-jobs:
-  plan:
-    runs-on: ubuntu-latest
-    timeout-minutes: 5
-    outputs:
-      platforms: ${{ steps.platforms.outputs.platforms }}
-    steps:
-      - uses: actions/checkout@v4
-      - id: platforms
-        run: echo "platforms=$(python3 -c 'import json, tools.horizon_mod_binstall as m; print(json.dumps(m.PLATFORMS))')" >> "$GITHUB_OUTPUT"
-  build:
-    needs: plan
-    name: build ${{ matrix.target }}
-    strategy:
-      fail-fast: false
-      matrix:
-        include: ${{ fromJSON(needs.plan.outputs.platforms) }}
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 30
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: ${{ matrix.target }}
-      - name: The aarch64 Linux linker
-        if: matrix.target == 'aarch64-unknown-linux-gnu'
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y gcc-aarch64-linux-gnu
-          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc" >> "$GITHUB_ENV"
-      - name: Build
-        run: cargo build --release --locked -p cargo-horizon-mod --target ${{ matrix.target }}
-      - name: It starts
-        if: matrix.run
-        shell: bash
-        run: |
-          set -euo pipefail
-          binary="target/${{ matrix.target }}/release/cargo-horizon-mod"
-          [ -f "$binary.exe" ] && binary="$binary.exe"
-          out=$("$binary" 2>&1 || true)
-          case "$out" in
-            *"usage: cargo horizon-mod"*) ;;
-            *) echo "$out"; echo "::error::$binary does not start"; exit 1 ;;
-          esac
-      - name: Package
-        shell: bash
-        run: |
-          set -euo pipefail
-          binary="target/${{ matrix.target }}/release/cargo-horizon-mod"
-          [ -f "$binary.exe" ] && binary="$binary.exe"
-          mkdir -p dist
-          tar -czf "dist/$(basename "$binary" | sed 's/\.exe$//')-${{ matrix.target }}.tar.gz" -C "$(dirname "$binary")" "$(basename "$binary")"
-      - uses: actions/upload-artifact@v4
-        with:
-          name: cargo-horizon-mod-${{ matrix.target }}
-          path: dist/*.tar.gz
-          if-no-files-found: error
-          retention-days: 3
-  publish:
-    needs: build
-    if: startsWith(github.ref, 'refs/tags/')
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    permissions:
-      contents: write
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/download-artifact@v4
-        with:
-          pattern: cargo-horizon-mod-*
-          path: dist
-          merge-multiple: true
-      - name: The tag and the manifest name the same release and archives
-        run: python3 tools/horizon_mod_binstall.py dist "$GITHUB_REF_NAME"
-      - name: Checksums
-        run: |
-          set -euo pipefail
-          cd dist
-          for file in *.tar.gz; do sha256sum "$file" | cut -d' ' -f1 > "$file.sha256"; done
-      - name: Publish
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          set -euo pipefail
-          notes="\`cargo binstall --git https://github.com/horizon-rust/horizon cargo-horizon-mod\`"
-          if gh release view "$GITHUB_REF_NAME" >/dev/null 2>&1; then
-            gh release upload "$GITHUB_REF_NAME" dist/* --clobber
-          else
-            gh release create "$GITHUB_REF_NAME" dist/* --latest=false --title "cargo-horizon-mod ${GITHUB_REF_NAME#cargo-horizon-mod-v}" --notes "$notes"
-          fi
@@ -1,7 +1,7 @@
 name: checks
 # verify: every pull request and every push to main, on GitHub's runners (the repository is public). It is the
-# check main requires, so it never has a condition: a skipped job counts as passed, and every run of this workflow
-# must report a real verify (a pull request that changes no Rust finishes it in seconds instead).
+# check main requires, so it always runs: a skipped job counts as passed, and every run of this workflow must report
+# a real verify. It gathers the python, clippy and tests jobs (a change to docs alone skips their Rust steps).
 # parity: the vanilla harnesses a pull request's changes can affect, on the Mac mini's runner, which holds the
 # maintainer's own Minecraft files (Horizon never downloads the game); .github/workflows/parity.yml. Only for a pull
 # request that changes a harness, oracle, probe or the runner: the rest are checked on main by parity-main. A fork's pull
@@ -24,37 +24,19 @@ env:
  HORIZON_TELEMETRY_URL: "off"

 jobs:
-  # One job, not one per check: each job takes a runner from the organisation's shared pool, and with every pull request
-  # and every merge to main starting this workflow, three jobs a run left the pool's queue tens of minutes deep.
-  #
-  # Where (docs/ci-runners.md): our checks runners (label horizon-checks: the desktop's, an isolated user, so a fork's
-  # pull request runs there too) take the pull requests whose number ends in 0 or 1, about what their three runners
-  # can do; GitHub's runners take the others and main's pushes (which also save the Rust cache GitHub's pull request
-  # runs read), so both pools work at once. The repository variable SELF_HOSTED_CI moves them: `all` every job to
-  # ours, `light` (the desktop paused) or `off` every job to GitHub's. On ours the build folder persists
-  # (CARGO_TARGET_DIR, outside the checkout), so the apt packages, Python and the Rust cache steps are GitHub's only.
-  verify:
-    runs-on: >-
-      ${{ vars.SELF_HOSTED_CI != 'off' && vars.SELF_HOSTED_CI != 'light' && (vars.SELF_HOSTED_CI == 'all' ||
-      github.event_name == 'pull_request' && (endsWith(format('{0}', github.event.pull_request.number), '0') ||
-      endsWith(format('{0}', github.event.pull_request.number), '1'))) &&
-      fromJSON('["self-hosted", "linux", "horizon-checks"]') || 'ubuntu-latest' }}
-    timeout-minutes: 45
+  # verify's checks run as three jobs at once (python, clippy, tests: ~4 min instead of ~8 one after another), and
+  # verify gathers them. A failed job makes its dependents skip, and a skipped required check counts as passed, so
+  # verify runs always() and fails unless all three passed.
+  python:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: actions/setup-python@v5
-        if: runner.environment == 'github-hosted'
        with:
          python-version: '3.12'
-      - name: Does this pull request need Rust checks?
-        if: github.event_name == 'pull_request'
-        id: rust
-        env:
-          BASE_SHA: ${{ github.event.pull_request.base.sha }}
-          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
-        run: python3 tools/ci/rust_changes.py "$BASE_SHA" "$HEAD_SHA" >> "$GITHUB_OUTPUT"
      # A pull request adds only its own commits to main, so it reads those; main's pushes read every ref's history.
      - name: Keep game artifacts out of Git
        env:
@@ -68,32 +50,32 @@ jobs:
          else
            python tools/check_public_tree.py --history
          fi
-      # Our runners as GitHub's: some Python tests compile Rust with a bare `rustc` (GitHub's image has a default
-      # toolchain, our runners' own rustup homes may not), and the GPU tests find no adapter there, so they return
-      # early. Ours have Mesa's software Vulkan for parity; a backend Linux lacks keeps the tests from it, so a pull
-      # request's verify doesn't depend on which pool took it (#8627: a GPU test that flakes on lavapipe).
-      - name: Our runners as GitHub's (a default Rust toolchain, no GPU)
-        if: runner.environment != 'github-hosted'
-        run: |
-          rustup toolchain install stable --profile minimal --component rustfmt --component clippy
-          rustup default stable
-          echo "WGPU_BACKEND=dx12" >> "$GITHUB_ENV"
      - name: Test offline research tooling
        run: python -m unittest discover -s tests -v
+  clippy:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Does this pull request need Rust checks?
+        if: github.event_name == 'pull_request'
+        id: rust
+        env:
+          BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+        run: python3 tools/ci/rust_changes.py "$BASE_SHA" "$HEAD_SHA" >> "$GITHUB_OUTPUT"
      - name: Install Rust toolchain and the ALSA and udev headers the client links against
        if: steps.rust.outputs.required != 'false'
-        env:
-          HOSTED: ${{ runner.environment == 'github-hosted' }}
        run: |
-          if [ "$HOSTED" = true ]; then
-            sudo apt-get update && sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev
-          fi
+          sudo apt-get update && sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev
          rustup toolchain install stable --profile minimal --component rustfmt --component clippy
-      # Dependencies and the workspace's own build, saved from main's runs (pull requests read main's cache).
+      # Dependencies and the workspace's own check, saved from main's runs (pull requests read main's cache).
      - uses: Swatinem/rust-cache@v2
-        if: steps.rust.outputs.required != 'false' && runner.environment == 'github-hosted'
+        if: steps.rust.outputs.required != 'false'
        with:
-          shared-key: verify
+          shared-key: verify-clippy
          save-if: ${{ github.ref == 'refs/heads/main' }}
      - name: Check formatting and lint
        if: steps.rust.outputs.required != 'false'
@@ -102,7 +84,32 @@ jobs:
          cargo +stable clippy --workspace --all-targets -- -D warnings
          # The server build (released as horizon-engine): the game without sound or controllers.
          cargo +stable clippy -p horizon-client --all-targets --no-default-features -- -D warnings
-      # Libraries, binaries and integration tests, then doc tests: not the ~275 examples, which clippy above already
+  tests:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Does this pull request need Rust checks?
+        if: github.event_name == 'pull_request'
+        id: rust
+        env:
+          BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+        run: python3 tools/ci/rust_changes.py "$BASE_SHA" "$HEAD_SHA" >> "$GITHUB_OUTPUT"
+      - name: Install Rust toolchain and the ALSA and udev headers the client links against
+        if: steps.rust.outputs.required != 'false'
+        run: |
+          sudo apt-get update && sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev
+          rustup toolchain install stable --profile minimal
+      # Dependencies and the workspace's own build, saved from main's runs (pull requests read main's cache).
+      - uses: Swatinem/rust-cache@v2
+        if: steps.rust.outputs.required != 'false'
+        with:
+          shared-key: verify
+          save-if: ${{ github.ref == 'refs/heads/main' }}
+      # Libraries, binaries and integration tests, then doc tests: not the ~275 examples, which clippy already
      # type-checks and the parity job builds and runs (they were most of this step's build and link time).
      # cargo test, not nextest: nextest's process per test reloads each binary's shared tables for every test, and on
      # these 4-core runners it was no faster (#4978).
@@ -111,20 +118,27 @@ jobs:
        run: |
          cargo +stable test --workspace --lib --bins --tests
          # The full content-root tests (#[ignore]d: minutes each on a laptop). The same build as above; they need the
-          # prepared vanilla data, so without it they pass at once. Keep the target selection identical to avoid
-          # recompiling the workspace with a different dependency graph.
-          cargo +stable test --workspace --lib --bins --tests mod_content::tests:: -- --ignored
+          # prepared vanilla data, so without it they pass at once.
+          cargo +stable test --workspace --lib mod_content::tests:: -- --ignored
          cargo +stable test --workspace --doc
+  verify:
+    if: always()
+    needs: [python, clippy, tests]
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Did python, clippy and tests pass?
+        env:
+          RESULTS: ${{ join(needs.*.result, ' ') }}
+        run: |
+          echo "python, clippy, tests: $RESULTS"
+          for result in $RESULTS; do [ "$result" = success ] || exit 1; done
  # The launcher is its own workspace (launcher/Cargo.toml), so verify's cargo runs never build it. A pull request that
  # changes it or a crate it builds is checked here, and so is every push to main: two pull requests can each pass
  # alone and break it together (#2059 and the registry ratings did, 2026-10-26).
  launcher:
-    runs-on: >-
-      ${{ vars.SELF_HOSTED_CI != 'off' && vars.SELF_HOSTED_CI != 'light' && (vars.SELF_HOSTED_CI == 'all' ||
-      github.event_name == 'pull_request' && (endsWith(format('{0}', github.event.pull_request.number), '0') ||
-      endsWith(format('{0}', github.event.pull_request.number), '1'))) &&
-      fromJSON('["self-hosted", "linux", "horizon-checks"]') || 'ubuntu-latest' }}
-    timeout-minutes: 45
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
        with:
@@ -138,16 +152,12 @@ jobs:
        run: python3 tools/ci/rust_changes.py --launcher "$BASE_SHA" "$HEAD_SHA" >> "$GITHUB_OUTPUT"
      - name: Install Rust and the headers GPUI links against
        if: steps.launcher.outputs.required != 'false'
-        env:
-          HOSTED: ${{ runner.environment == 'github-hosted' }}
        run: |
-          if [ "$HOSTED" = true ]; then
-            sudo apt-get update && sudo apt-get install -y --no-install-recommends libxkbcommon-x11-dev libwayland-dev \
-              libx11-xcb-dev libfontconfig-dev libvulkan-dev libasound2-dev libudev-dev
-          fi
+          sudo apt-get update && sudo apt-get install -y --no-install-recommends libxkbcommon-x11-dev libwayland-dev \
+            libx11-xcb-dev libfontconfig-dev libvulkan-dev libasound2-dev libudev-dev
          rustup toolchain install stable --profile minimal --component rustfmt --component clippy
      - uses: Swatinem/rust-cache@v2
-        if: steps.launcher.outputs.required != 'false' && runner.environment == 'github-hosted'
+        if: steps.launcher.outputs.required != 'false'
        with:
          workspaces: launcher
          shared-key: launcher
@@ -164,8 +174,7 @@ jobs:
  # a harness, an oracle, a probe or the runner, or carries the run-parity label (run-parity.yml, when it is added).
  parity-scope:
    if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
-    # A git diff of this repository's own branch: one of our small runners (horizon-light, docs/ci-runners.md).
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    outputs:
      run: ${{ steps.scope.outputs.run }}
    steps:
@@ -29,8 +29,7 @@ jobs:
    # the skipped runs of ordinary comments must not cancel a waiting one.
    concurrency:
      group: claim-${{ github.event.issue.number }}
-    # One of our small runners (horizon-light), out of GitHub's pool: main's script only (docs/ci-runners.md).
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      contents: read
@@ -56,8 +55,7 @@ jobs:
        run: python3 tools/ci/claim_command.py command
  release:
    if: github.event_name != 'issue_comment' && github.repository == 'horizon-rust/horizon'
-    # One of our small runners (horizon-light), out of GitHub's pool: main's script only (docs/ci-runners.md).
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 10
    permissions:
      contents: read
@@ -150,7 +150,7 @@ jobs:
        if: runner.os == 'Linux'
        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev
      - name: Build the client, horizon-ctl, horizon-prepare and horizon-server
-        run: cargo build --release --locked ${{ matrix.target && format('--target {0}', matrix.target) || '' }} -p horizon-client -p horizon-client-lib --bin horizon-client --bin horizon-ctl -p horizon-prepare --bin horizon-prepare -p horizon-server --bin horizon-server
+        run: cargo build --release --locked ${{ matrix.target && format('--target {0}', matrix.target) || '' }} -p horizon-client --bin horizon-client --bin horizon-ctl -p horizon-prepare --bin horizon-prepare -p horizon-server --bin horizon-server
      - name: Every program the release folder takes was built
        run: |
          for binary in horizon-client horizon-ctl horizon-prepare horizon-server; do
@@ -185,15 +185,6 @@ jobs:
              ${{ runner.os == 'Windows' && 'python' || 'python3' }} tools/check_imports.py "$file"
            fi
          done
-      - name: Baseline x86-64 CPUs only
-        # No POPCNT or LZCNT at all (the script says why only those): a C library's count intrinsic killed the
-        # game before main on a Core 2 (#7264). Not the Mac builds: every Intel Mac that runs macOS 11 has both.
-        if: runner.os != 'macOS'
-        run: |
-          set -euo pipefail
-          rustup component add llvm-tools
-          ${{ runner.os == 'Windows' && 'python' || 'python3' }} tools/check_cpu_baseline.py \
-            $(for binary in horizon-client horizon-ctl horizon-prepare horizon-server; do echo "$BIN/$binary${{ matrix.exe }}"; done)
      - name: Every program starts
        run: |
          set -euo pipefail
@@ -8,15 +8,10 @@ name: launcher
 # feature. The version and the tag are given to the build (HORIZON_LAUNCHER_VERSION, HORIZON_LAUNCHER_TAG): no bump
 # commits.
 # Never marked latest. Pushes to launcher branches only build. RELEASES_PAUSED=1 stops releases.
-# Linux ships two archives of one binary: the .tar.gz the launcher updates itself from, and an
-# AppImage (packaging/linux/appimage.sh) for players without a distribution package, which replaces
-# itself instead (launcher/src/backend.rs).
 # macOS: Apple Silicon, and Intel cross-built for x86_64-apple-darwin on the same runner, its tests and smoke test
 # under Rosetta 2 (#1161). With the repository variable MACOS_SIGN_IDENTITY set, Horizon.app and the .dmg are signed with
 # Developer ID, notarized and stapled, from the runner's signing keychain (packaging/macos/README.md);
 # unset (forks), they are signed ad hoc.
-# Windows ships the launcher's own binary twice: in the ZIP (what a launcher updates itself from) and as
-# horizon-launcher-setup.exe, which opens the per-user installer instead of Home (launcher/src/installer.rs).
 #   gh workflow run launcher --ref <branch>                    # dry run: builds everything, publishes nothing
 #   gh workflow run launcher --ref main -f dry_run=false -f force=true

@@ -24,19 +19,16 @@ on:
  push:
    branches: [main, launcher, 'launcher-*']
    paths:
-      # Everything the launcher is built and packaged from, as tools/release_train.py's LAUNCHER_PATHS.
+      # Every crate the launcher builds in, as tools/release_train.py's LAUNCHER_PATHS.
      - 'launcher/**'
      - 'crates/horizon-bench/**'
      - 'crates/horizon-friends/**'
-      - 'crates/horizon-mcp/**'
      - 'crates/horizon-mods/**'
      - 'crates/horizon-port-pack/**'
      - 'crates/horizon-prepare/**'
      - 'crates/horizon-release-sign/**'
      - 'crates/horizon-telemetry/**'
      - 'crates/horizon-theme/**'
-      - 'packaging/linux/**'
-      - 'packaging/icons/**'
      - '.github/workflows/launcher.yml'
  schedule:
    - cron: '7-59/10 * * * *'
@@ -169,7 +161,7 @@ jobs:
        if: runner.os == 'Linux'
        run: |
          sudo apt-get update
-          sudo apt-get install -y libxkbcommon-x11-dev libwayland-dev libx11-xcb-dev libfontconfig-dev libvulkan-dev libasound2-dev patchelf
+          sudo apt-get install -y libxkbcommon-x11-dev libwayland-dev libx11-xcb-dev libfontconfig-dev libvulkan-dev libasound2-dev
      - name: Metal shaders compiled now, or at run time without the Metal toolchain
        # GPUI compiles its Metal shaders when it builds; the Mac mini has Xcode without the Metal toolchain
        # (xcodebuild -downloadComponent MetalToolchain), so there they are compiled when the launcher starts.
@@ -177,7 +169,7 @@ jobs:
        run: |
          if ! xcrun metal --version > /dev/null 2>&1; then
            echo "::notice::No Metal toolchain on this runner: GPUI compiles its shaders at run time"
-            echo "LAUNCHER_FEATURES=gpui_platform/runtime_shaders" >> "$GITHUB_ENV"
+            echo "LAUNCHER_FEATURES=gpui/runtime_shaders" >> "$GITHUB_ENV"
          fi
      # Every test target (the library, the binary, tests/), on each system the launcher ships for.
      - run: cargo test --release --locked ${{ matrix.target && format('--target {0}', matrix.target) || '' }} ${LAUNCHER_FEATURES:+--features "$LAUNCHER_FEATURES"}
@@ -243,18 +235,6 @@ jobs:
          # The client starts: --help prints before any window or GPU is needed.
          help() { "$client" --help > "$RUNNER_TEMP/help.txt" 2>&1 && head -3 "$RUNNER_TEMP/help.txt" && grep -q -- '--resources' "$RUNNER_TEMP/help.txt"; }
          soft help
-          # The per-user Windows setup: the same binary under the setup's name installs into a scratch
-          # folder, and the copy it installs uninstalls itself. HKCU of the runner only.
-          if [[ "$RUNNER_OS" == "Windows" ]]; then
-            setup="$RUNNER_TEMP/setup-smoke"
-            cp "$launcher" "$RUNNER_TEMP/horizon-launcher-setup.exe"
-            "$RUNNER_TEMP/horizon-launcher-setup.exe" setup --quiet --dir "$setup"
-            installed="$setup/Horizon Launcher/horizon-launcher.exe"
-            [[ -f "$installed" ]] || { echo "::error::the setup copied no launcher"; exit 1; }
-            "$installed" uninstall --quiet
-            [[ ! -f "$installed" ]] || { echo "::error::uninstall left the launcher"; exit 1; }
-            rm -rf "$setup"
-          fi
          rm -rf "$HORIZON_LAUNCHER_HOME"
      - name: The signing keychain, unlocked
        if: runner.os == 'macOS' && vars.MACOS_SIGN_IDENTITY != ''
@@ -274,13 +254,6 @@ jobs:
            DMGBUILD="$RUNNER_TEMP/dmg/bin/dmgbuild" ../packaging/macos/package.sh "$BIN/${{ matrix.binary }}" "$version" out ${{ matrix.mac_arch }}
            rm -rf out/Horizon.app
          else
-            version=${HORIZON_LAUNCHER_VERSION:-$(sed -n 's/^version = "\(.*\)"/\1/p' Cargo.toml | head -1)}
-            if [[ "$RUNNER_OS" == "Linux" ]]; then
-              # The .tar.gz below is what the launcher updates itself from; the AppImage is what a
-              # player downloads and double-clicks, and it replaces itself instead
-              # (packaging/linux/appimage.sh, launcher/src/backend.rs).
-              ../packaging/linux/appimage.sh "$BIN/${{ matrix.binary }}" "$version" out
-            fi
            mkdir -p dist
            cp "$BIN/${{ matrix.binary }}" dist/
            if [[ "${{ matrix.asset }}" == *.tar.gz ]]; then
@@ -290,12 +263,6 @@ jobs:
            fi
          fi
          ls -l out
-      - name: Setup exe (Windows)
-        # The launcher's binary under another name: started with no arguments it shows the per-user
-        # installer instead of Home (launcher/src/installer.rs). Its name is what makes it the setup,
-        # so the ZIP's copy stays the launcher. Both go into the release's signed SHA256SUMS.
-        if: runner.os == 'Windows'
-        run: cp "$BIN/${{ matrix.binary }}" out/horizon-launcher-setup.exe
      - uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.asset }}
@@ -15,13 +15,9 @@ on:
      - '.github/workflows/mod-registry.yml'
 permissions:
  contents: read
-concurrency:
-  group: mod-registry-${{ github.event.pull_request.number || github.sha }}
-  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 jobs:
  check:
-    # Our checks runners (label horizon-checks, docs/ci-runners.md); SELF_HOSTED_CI=light or off: GitHub's.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && vars.SELF_HOSTED_CI != 'light' && fromJSON('["self-hosted", "linux", "horizon-checks"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 20
    defaults:
      run:
@@ -29,9 +25,7 @@ jobs:
    steps:
      - uses: actions/checkout@v4
      - run: rustup toolchain install stable --profile minimal --component rustfmt --component clippy
-      # Ours keep their build folder between jobs.
      - uses: Swatinem/rust-cache@v2
-        if: runner.environment == 'github-hosted'
        with:
          workspaces: crates/horizon-mod-registry
          save-if: ${{ github.ref == 'refs/heads/main' }}
@@ -1,32 +0,0 @@
-name: mojang republish
-# Hourly: does Mojang's version manifest list a pinned-version JSON that research-lock.json does not know?
-# If so, one issue "Mojang republished <version>: <sha8>" with the hashes and a lock snippet
-# (tools/ci/mojang_republish.py). Reads only Mojang's public manifest.
-#   gh workflow run "mojang republish" -f dry_run=true
-on:
-  schedule:
-    - cron: '23 * * * *'  # hourly: a republished JSON breaks horizon-prepare for every new player until accepted
-  workflow_dispatch:
-    inputs:
-      dry_run:
-        description: Only print what it would do with issues
-        type: boolean
-        default: false
-permissions:
-  contents: read
-  issues: write
-concurrency:
-  group: mojang-republish
-  cancel-in-progress: false
-
-jobs:
-  check:
-    # One of our small runners (label horizon-light, docs/ci-runners.md): main's script, Mojang's public manifest.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
-    timeout-minutes: 10
-    steps:
-      - uses: actions/checkout@v4
-      - name: Check the manifest
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: python3 tools/ci/mojang_republish.py ${{ inputs.dry_run && '--dry-run' || '' }}
@@ -1,55 +0,0 @@
-name: native hook stamp
-# Opens a PR that numbers pending fragments after they merge. Only pushes to
-# main run main's own tool; fragments are read as data, not PR code.
-
-on:
-  push:
-    branches: [main]
-    paths:
-      - 'tools/native-hook-fragments/*.json'
-
-permissions:
-  contents: read
-
-concurrency:
-  group: native-hook-stamp
-  cancel-in-progress: false
-
-jobs:
-  stamp:
-    if: github.repository == 'horizon-rust/horizon'
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-      pull-requests: write
-    timeout-minutes: 10
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          ref: main
-          fetch-depth: 0
-      - name: Open a stamp pull request
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: |
-          set -eu
-          branch=automation/native-hook-stamp
-          if [ -n "$(gh pr list --state open --head "$branch" --json number --jq '.[0].number // empty')" ]; then
-            echo "A stamp pull request is already open."
-            exit 0
-          fi
-          python3 tools/stamp_native_hooks.py
-          if git diff --quiet; then
-            echo "No fragments to stamp."
-            exit 0
-          fi
-          git config user.name 'github-actions[bot]'
-          git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
-          git checkout -b "$branch"
-          git add -u
-          git commit -m 'Stamp native hook API fragments'
-          if git ls-remote --exit-code --heads origin "$branch" >/dev/null; then
-            git fetch origin "+refs/heads/$branch:refs/remotes/origin/$branch"
-          fi
-          git push --force-with-lease origin "$branch"
-          gh pr create --base main --head "$branch" --title 'Stamp native hook API fragments' --body 'Assign API numbers to the pending native hook fragments. Close and reopen this PR to run CI.'
@@ -253,8 +253,7 @@ jobs:
    # Tells the thread that asked for this build how it ended. A conflict `pick` already explained there.
    needs: [pick, build, sign, publish]
    if: always() && inputs.issue != '' && needs.pick.result == 'success'
-    # One comment, no checkout and no secret: one of our small runners (label horizon-light, docs/ci-runners.md).
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      issues: write
@@ -19,9 +19,7 @@ jobs:
    concurrency:
      group: overlap-note-${{ github.event.pull_request.number }}
      cancel-in-progress: true
-    # One of our small runners (horizon-light), out of GitHub's pool: it runs main's script only (above), so a fork's
-    # pull request runs none of its code there (docs/ci-runners.md). SELF_HOSTED_CI=off: GitHub's runners.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 10
    permissions:
      contents: read
@@ -1,72 +0,0 @@
-name: pack load bench
-# How long resource packs take to load: crates/horizon-client-render/examples/pack_load_bench.rs on generated packs
-# (no game files), on the branch and then on `base` with the branch's copy of the bench, on the same runner, so a pull
-# request can show its numbers next to main's. Started by hand, or by a push to a `pack-bench/*` branch (a fork can't
-# start a workflow its main lacks), against horizon-rust/horizon's main.
-on:
-  push:
-    branches: ['pack-bench/**']
-  workflow_dispatch:
-    inputs:
-      base:
-        description: Ref to compare against
-        default: main
-      scale:
-        description: How many times the default pack sizes
-        default: '1'
-permissions:
-  contents: read
-env:
-  HORIZON_TELEMETRY_URL: "off"
-  CARGO_TERM_COLOR: never
-
-jobs:
-  bench:
-    # Our checks runners (label horizon-checks, docs/ci-runners.md): the branch and the base on the same machine, as
-    # the comparison needs. SELF_HOSTED_CI=light or off: GitHub's.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && vars.SELF_HOSTED_CI != 'light' && fromJSON('["self-hosted", "linux", "horizon-checks"]') || 'ubuntu-latest' }}
-    timeout-minutes: 90
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: Install Rust and the ALSA and udev headers
-        env:
-          HOSTED: ${{ runner.environment == 'github-hosted' }}
-        run: |
-          if [ "$HOSTED" = true ]; then
-            sudo apt-get update && sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev
-          fi
-          rustup toolchain install stable --profile minimal
-      - uses: Swatinem/rust-cache@v2
-        if: runner.environment == 'github-hosted'
-        with:
-          shared-key: pack-bench
-      - name: Bench the branch
-        env:
-          SCALE: ${{ inputs.scale || '1' }}
-        run: |
-          cargo run --profile fast -p horizon-client-render --example pack_load_bench -- --scale "$SCALE" > head.md
-      - name: Bench the base, with the branch's bench
-        env:
-          BASE: ${{ inputs.base || 'main' }}
-          SCALE: ${{ inputs.scale || '1' }}
-        run: |
-          git fetch https://github.com/horizon-rust/horizon.git "$BASE"
-          # Our runners keep the folder beside the checkout between jobs.
-          git worktree remove --force ../base 2> /dev/null || rm -rf ../base
-          git worktree prune
-          git worktree add ../base FETCH_HEAD
-          cp crates/horizon-client-render/examples/pack_load_bench.rs ../base/crates/horizon-client-render/examples/
-          # A bench row that times a function the base lacks keeps it from building there: then
-          # the branch's own rows compare the two ways.
-          target=${CARGO_TARGET_DIR:-$GITHUB_WORKSPACE/target}
-          (cd ../base && CARGO_TARGET_DIR="$target" cargo run --profile fast -p horizon-client-render \
-            --example pack_load_bench -- --scale "$SCALE") > base.md \
-            || echo "The bench does not build on the base." > base.md
-      - name: Summary
-        run: |
-          {
-            echo "### Branch ($(git rev-parse --short HEAD))"; cat head.md
-            echo; echo "### Base (${{ inputs.base || 'main' }})"; cat base.md
-          } | tee -a "$GITHUB_STEP_SUMMARY"
@@ -16,9 +16,7 @@ jobs:
  label:
    # Title-only edits change nothing: skip them before a runner starts.
    if: github.event.action != 'edited' || github.event.changes.body != null
-    # One of our small runners (horizon-light), out of GitHub's pool: it runs main's script only (above), so a fork's
-    # pull request runs none of its code there (docs/ci-runners.md). SELF_HOSTED_CI=off: GitHub's runners.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      contents: read
@@ -15,13 +15,9 @@ on:
      - '.github/workflows/telemetry-server.yml'
 permissions:
  contents: read
-concurrency:
-  group: telemetry-server-${{ github.event.pull_request.number || github.sha }}
-  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 jobs:
  check:
-    # Our checks runners (label horizon-checks, docs/ci-runners.md); SELF_HOSTED_CI=light or off: GitHub's.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && vars.SELF_HOSTED_CI != 'light' && fromJSON('["self-hosted", "linux", "horizon-checks"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 20
    defaults:
      run:
@@ -29,9 +25,7 @@ jobs:
    steps:
      - uses: actions/checkout@v4
      - run: rustup toolchain install stable --profile minimal --component rustfmt --component clippy
-      # Ours keep their build folder between jobs.
      - uses: Swatinem/rust-cache@v2
-        if: runner.environment == 'github-hosted'
        with:
          workspaces: crates/horizon-telemetry-server
          save-if: ${{ github.ref == 'refs/heads/main' }}
@@ -21,8 +21,7 @@ jobs:
      startsWith(github.event.comment.body, '/reopen') ||
      startsWith(github.event.comment.body, '/label') ||
      startsWith(github.event.comment.body, '/unlabel'))
-    # One of our small runners (label horizon-light, docs/ci-runners.md): main's script only, as above.
-    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "horizon-light"]') || 'ubuntu-latest' }}
+    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      contents: read
@@ -30,7 +30,6 @@ Feature → files → harness for the most-changed areas: [docs/architecture.md]
  change), none for a fix. Agents never add `release-now`: the maintainer decides it. Merges ship in batches of 5, or after
  6 hours ([docs/release-flow.md](docs/release-flow.md)).
 - Contributors first: `gh pr list --state open --search <area>` before you start; never duplicate theirs.
- **No hardcoded user-facing strings.** Keep UI translation-ready from the start. In the launcher (`launcher/`), wrap visible text with `tr("...")` or `trf("... {arg} ...", &[("arg", &val)])` from `crate::i18n` instead of raw string literals or `format!`. In the game, use translation keys (`Text::tr`, `lang::get`), never hardcoded English strings.
 - **Claim before you start**: comment `/claim` on the issue (no issue yet: open one, then claim it). An assigned
  issue is taken: pick another. `/unclaim` when you stop; a claim with no open PR linking it is released after 5 days.

@@ -40,8 +39,7 @@ Game workspace (root `Cargo.toml`); `launcher/` and `crates/horizon-telemetry-se

 | Crate | Owns |
 |---|---|
-| `horizon-client` | Gameplay library (`src/lib.rs`: `game.rs` + `game/`, `entry.rs`) and thin executable (`src/main.rs`). Also the dedicated server (`--dedicated`). Re-exports `horizon-client-lib` for existing mod paths. |
-| `horizon-client-lib` | Reusable client systems, `horizon-ctl`, probes and their tests. Its manifest points to the existing sources under `crates/horizon-client/`; the library root is `src/client_lib.rs`. It never depends on gameplay. |
+| `horizon-client` | The game: a lib (`src/lib.rs`, ~100 flat modules: gameplay, networking, title screens) and the bin (`src/main.rs` → `game.rs` + `game/`), plus `horizon-ctl` (`src/bin/horizon-ctl/`). Also the dedicated server (`--dedicated`) |
 | `horizon-items` | Blocks and items below gameplay: `blocks.rs` (block facts), `items.rs`, `item_data.rs` (components), `enchant.rs`, `cooldowns.rs`, `bundle.rs`, `item_nbt.rs`. Re-exported as `horizon_client::items`... |
 | `horizon-command` | Command parsing (Brigadier): the vanilla tree, argument types, selectors, suggestions, the tree's network form. Re-exported as `horizon_client::command` |
 | `horizon-client-core` | The client lib's bottom layer: `text.rs`, `lang.rs`, `snbt.rs`, `nbt_path.rs`, `component.rs`, `scoreboard.rs`, `bossbar.rs`, `gamerules.rs`, `block_entity_nbt.rs`, registry/particle/sound tables. Re-exported under the old paths (`horizon_client::text`...) |
@@ -55,11 +53,9 @@ Game workspace (root `Cargo.toml`); `launcher/` and `crates/horizon-telemetry-se
 | `horizon-server` | `horizon-server`: `server.toml`, CLI, supervisor of the headless game ([docs/hosting.md](docs/hosting.md)) |
 | `horizon-server-files` | `server.properties`, eula, ops/whitelist/bans, usercache |
 | `horizon-anticheat` | The dedicated server's anticheat, off by default: `[anticheat]` settings, violation levels, the checks' rules; the hub runs them (`lan/anticheat.rs`) ([docs/anticheat.md](docs/anticheat.md)) |
-| `horizon-cosmetics` | Cosmetic items Horizon clients draw on players (off by default): the item format, bones and animations ([docs/cosmetics.md](docs/cosmetics.md)) |
 | `horizon-friends`, `horizon-relay` | Play with Friends: invite codes, encrypted tunnel, the relay ([docs/play-with-friends.md](docs/play-with-friends.md)) |
 | `horizon-mods`, `cargo-horizon-mod` | Content mods (`.hmod`: manifest, content fence, no code), the registry index and `.hpack`, and `cargo horizon-mod` (`new`, `build`, `run`, `check`, `registry`) ([docs/mods.md](docs/mods.md)). Code mods are native, built by the launcher ([docs/native-mods.md](docs/native-mods.md)) |
 | `horizon-port-pack` | Porting Java modpacks ([docs/modpacks.md](docs/modpacks.md)) |
-| `horizon-optifine` | OptiFine-format pack files below every feature that reads them: `.properties`, the name/range/block matchers, paths and `optifine/` folders, and custom entity models (`cem/`: `.jem`/`.jpm` parsing and baking) |
 | `horizon-shader-api` | Horizon's own WGSL shader packs ([docs/api/shaders.md](docs/api/shaders.md)): `horizon-shaders.toml`, the `.hshader` package; shared by the game, the launcher and the registry |
 | `horizon-shaders` | Shader packs (the `shaders/` folder format), rebuilt clean-room from a written spec of the format; no wgpu |
 | `horizon-theme` | Design tokens and fonts for the launcher, the game's own menus and the website |
@@ -72,23 +68,13 @@ unittest discover -s tests`), `mods/horizon/src/test/java/dev/horizonlab/parity/
 `docs/`, `.github/workflows/`. The website (playhorizon.dev) is the private horizon-rust/horizon-site: its build
 reads `README.md`, `launcher/links.json`, `docs/api/`, `roadmap/roadmap.json` and `crates/horizon-theme/tokens.css` from main.

-## Write tests with signal
-
- Test observable behavior, not words in docs, comments or source. Keep checks for machine-consumed contracts.
- Use independent expected values or a vanilla oracle; do not derive the answer from the code under test.
- Test outcomes, not only calls to stubs. Use mocks to isolate behavior, not as the behavior itself.
- Skip tests of trivial constants, derives and getters, or behavior already covered by another test.
- Avoid pinning implementation details; a harmless refactor should not break a behavior test.
- Make slow tests faster without removing cases or weakening their coverage.
- Never delete parity harnesses or tests that pin vanilla behaviour: they are the spec.
-
 ## Build and test fast

 ```sh
 python3 tools/pr_ready.py                  # the self-check: fmt, clippy -D warnings, touched crates' tests, harnesses; paste its block in the PR
 python3 tools/pr_ready.py --quick          # same without harnesses
-cargo test -p horizon-client -p horizon-client-lib --lib --bins --tests   # skips the 104 examples (pr_ready does this); `--doc` separately
-cargo test -p horizon-client-lib --lib mod_content::tests:: -- --ignored   # the 5 slow content-root tests, #[ignore]d; pr_ready runs them when mod content, assets, blocks or items change
+cargo test -p horizon-client --lib --bins --tests   # skips the 104 examples (pr_ready does this); `--doc` separately
+cargo test -p horizon-client --lib mod_content::tests:: -- --ignored   # the 5 slow content-root tests, #[ignore]d; pr_ready runs them when mod content, assets, blocks or items change
 cargo build --profile fast -p horizon-client        # optimized, quick to link: use it to play or run lan_e2e
 python3 tools/parity.py --changed origin/main       # the harnesses your branch can affect (CI's parity job)
 python3 tools/parity.py --changed-files paths.txt --list   # which harnesses cover these files, without running them
@@ -104,16 +90,9 @@ python3 tools/agent_control_e2e.py         # horizon-ctl / MCP end to end
  + a Rust probe: `crates/<crate>/examples/<name>_{probe,fixture}.rs` (horizon-world 175, horizon-client 104),
  or the game binary with a fixture env var (`game/dispense_fixture.rs`, `game/sculk_fixture.rs`,
  `game/command_harness.rs`, `game/net_harness.rs`). Copy a nearby harness for a new one.
- Developing a native mod? Run `horizon-launcher settings native-profile dev` once. `dev` builds the game crate
-  unoptimized: a mod edit rebuilds about 6× faster than with `performance`, while game logic runs up to about twice as
-  slow. Use it while developing, not for playing; `performance` stays the default for players and releases
-  ([docs/native-mods.md](docs/native-mods.md)).
 - Probes build into `.local/parity-target/`; harnesses find binaries via `lab.cargo_target()`, never `target/`.
- Harness selection uses Cargo dep-info and reachable-code narrowing (`tools/parity_reach.py`).
-  `horizon-client-lib` builds the control tool and client probes without gameplay; their dep-info
-  excludes `game.rs` and `game/`, so gameplay edits do not rebuild or select those probes.
-  Source paths remain in `crates/horizon-client/`. Measure actual harness selection on refreshed
-  records with `tools/parity.py --changed-files paths.txt --list`; historical counts are not a guarantee.
+- What a change reruns (of 329 harnesses, measured 2026-10-23): a file of the game binary (`game.rs`, `game/`)
+  ~25, a file of the client lib ~103, of `horizon-world` ~103–109, of `horizon-core` ~119. Plan for it.
 - Rust integration tests: `crates/horizon-client/tests/` (`lan_bot.rs`, `generation_saves.rs`, `streaming_meshes.rs`).
 - Linux needs `libasound2-dev libudev-dev`; `--no-default-features` drops audio and controllers (the server build).
 - Run and drive the game (starts the `horizon-client` beside `horizon-ctl`; other arguments go to the game):
@@ -138,17 +117,14 @@ python3 tools/agent_control_e2e.py         # horizon-ctl / MCP end to end
 ## horizon-client: where things live

 `L:` = lib (`crates/horizon-client/src/`, or `crates/horizon-client-render/src/` for the modules that crate holds, under
-the same `horizon_client::<module>` paths), `G:` = gameplay (`crates/horizon-client/src/game/`), also in the lib in normal builds.
-Gameplay keeps its `horizon_client::<module>` imports through a self-crate alias. The executable
-contains only the allocator, mod API marker and a call to `entry::main`. For unit tests, the lib
-excludes `entry` and `game`, and the executable test target owns `game` so its process-wide test
-state stays separate from the library tests. This compiles gameplay twice for executable tests.
+the same `horizon_client::<module>` paths), `G:` = bin (`crates/horizon-client/src/game/`). The lib can't see
+`Game`; bin code reaches the lib as `horizon_client::<module>`.

 | Subsystem | Files |
 |---|---|
 | Game loop, tick, frame | `game.rs`: `fn run`, `impl ApplicationHandler for Game` (`window_event`, `about_to_wait`), `fn tick`, `fn tick_world`, `fn render`; L: `clock.rs`, `spans.rs`; `horizon-client-input/src/window.rs` |
 | Rendering | L: `gfx.rs` (`Renderer::new`, `Renderer::render`), `gfx/` (cull, occlusion, translucency, upload, timing, lod, weather, stars, end_sky), `*.wgsl`, `particles.rs`, `block_entity_render.rs`, `item_render.rs`, `fog.rs`, `clouds.rs`, `camera.rs`, `first_person.rs`; G: `render_tick.rs`, `item_draw.rs` |
-| Chunks, streaming, light | L: `streaming.rs` (worker pool: generate, light, mesh), `world.rs`, `chunk.rs`, `chunk_map.rs`, `light.rs`, `mesher.rs` + `mesher/`, `vanillagen.rs` (binds horizon-world's generator), `lod.rs` + `lod/`, `server_terrain.rs` (a server's kept chunks), `bluemap.rs` + `bluemap_detect.rs` (far terrain from its web map), `ticket_levels.rs`; G: `world_loading.rs`, `postprocess.rs`; game.rs `fn update_world` |
+| Chunks, streaming, light | L: `streaming.rs` (worker pool: generate, light, mesh), `world.rs`, `chunk.rs`, `chunk_map.rs`, `light.rs`, `mesher.rs` + `mesher/`, `vanillagen.rs` (binds horizon-world's generator), `lod.rs` + `lod/`, `ticket_levels.rs`; G: `world_loading.rs`, `postprocess.rs`; game.rs `fn update_world` |
 | World generation | `crates/horizon-world/src/worldgen/` (`generator*.rs`, `feature_graph.rs`, `structure/`, `carver/`) |
 | Block behaviour | `crates/horizon-world/src/level/` (`mod.rs`, `tick.rs`, `hooks.rs`, `redstone.rs`, `place.rs`, `interact.rs`); game.rs `fn tick_blocks`, `fn process_level_events` |
 | Mobs | L: `mobs.rs` (types), `mobs/` (`ai.rs`, `goals.rs`, `brain.rs`, `*_brain.rs`, `nav.rs`, `path.rs`, `species.rs`, `spawning.rs`, `render.rs`, `anim.rs`); G: `creatures.rs` (ticking, spawning, mob events), one file per mob family (`dragon.rs`, `wither.rs`, `villagers.rs`, `piglins.rs`, `golems.rs`...), `natural_spawning.rs` |
@@ -164,7 +140,7 @@ state stays separate from the library tests. This compiles gameplay twice for ex
 | Save and load | L: `save.rs` (level.dat, regions, playerdata), `entity_nbt.rs`, `options_file.rs`; `horizon-client-core/src/block_entity_nbt.rs`; G: `saving.rs`, `persist.rs` (entities); `crates/horizon-world/src/{region.rs,nbt.rs,datafix/}` |
 | Input | game.rs `fn window_event`, `fn key_pressed`, `fn play_mouse`; crate `horizon-client-input` (`keybinds.rs`, `keymapping.rs`, `key_names.rs`, `mouse.rs`, `input.rs`, `interaction_input.rs`, `gamepad.rs`, `clipboard.rs`); L: `osk.rs`; G: `pad.rs`, `pad_menu.rs` |
 | Audio | L: `audio.rs` (mixer), `sound_engine.rs`, `sound_events.rs`, `music.rs`, `ambience.rs`; G: `music.rs`, `subtitle_hud.rs` |
-| Resource packs | L: `packs.rs` + `packs/`, `pack_screen.rs`, `atlas_sources.rs`, `sprites.rs`, `mipmap.rs`, `model_library.rs`, `font.rs`, `mobs/cem.rs` + `mobs/cem_anim.rs` (OptiFine/EMF entity models and their animations); `horizon-client-core/src/lang.rs`; crates `horizon-assets`, `horizon-optifine`; G: `packs.rs` |
+| Resource packs | L: `packs.rs` + `packs/`, `pack_screen.rs`, `atlas_sources.rs`, `sprites.rs`, `mipmap.rs`, `model_library.rs`, `font.rs`; `horizon-client-core/src/lang.rs`; crate `horizon-assets`; G: `packs.rs` |
 | Agent control | L: `control.rs` (socket), `bin/horizon-ctl/`; G: `control.rs`, `agent.rs`, `events.rs`, `ui_control.rs` ([docs/agent-control.md](docs/agent-control.md)) |
 | Mods | crate `horizon-mods`; G: `mods.rs`; L: `mod_content.rs`, `mod_list.rs` |
 | Horizon extras, settings | L: `extras.rs`, `graphics.rs`, `settings.rs`, `minimap.rs`; G: `extras.rs`, `tweaks.rs`, `options.rs` |
@@ -173,30 +149,34 @@ state stays separate from the library tests. This compiles gameplay twice for ex

 - `struct Game` (game.rs, ~290 fields) holds everything. Its methods are spread over ~180 files: game.rs keeps
  the core (tick, render, input, inventory, world open/close) and each `game/<feature>.rs` adds an
-  `impl Game<'_>` block for one feature, with its own state types. Fields stay private to the gameplay module and its descendants. Gameplay tests run in the gameplay library, separate from reusable-library tests.
+  `impl Game<'_>` block for one feature, with its own state types. Fields are private to the bin.
 - Find a feature's code: `grep -rn "fn tick_<thing>\|fn <verb>_<thing>" crates/horizon-client/src/game*`;
  the file is usually `game/<thing>s.rs`. Who calls it: grep the name in game.rs's `fn tick` / `fn tick_world`.
 - Fields that say which mode runs: `remote` (this window is a client of a server: multiplayer, LAN guest, or
  single player on its server thread), `lan` (`LanHost`: this world is open to the network), `integrated`
  (the window's own server thread), `serving` (this `Game` *is* that server thread), `options.dedicated`.
-  `fn tick` returns `tick_remote()` when `remote` is set; a server ticks its levels (`fn tick_world`).
- A server's players run through the shared gameplay code: `as_guest` swaps the guest's
+  `fn tick` returns `tick_remote()` when `remote` is set; nothing else of the local simulation runs.
+- A server's players run through the same gameplay code as the local player: `as_guest` swaps the guest's
  state (position, inventory, mode, mining, item use) into `Game` for one call (`game/lan_actions.rs`), and
  `levels.rs` swaps whole dimensions in the same way. Changes reach clients through the block log, level
  events and the entity tracker (`lan/tracking.rs`, `game/lan_entities.rs`).
 - Shared read-only data: `Resources` (`res`: blocks, items, recipes, mob types, biomes) and `PackResources`
  (`pack`), both in game.rs.

-## Single player runs on a server thread
+## The two single-player paths

-`game/integrated.rs` runs a second `Game` (`serving`) on a "Server thread" with one level per dimension;
-the window joins it as a client through memory (`remote`), exactly as a LAN guest or a dedicated server's
-player does (#1514). A window's `Game` never ticks a world itself: the old in-frame path is gone
-(`--in-frame` and `--no-server-thread` only print a notice; `HORIZON_SERVER_THREAD` is ignored).
-Open `[server-thread]` issues list the gaps left.
+1. **Server thread (default since #1514):** `game/integrated.rs` runs a second `Game` (`serving`) on a
+   "Server thread" with one level per dimension; the window joins it as a client through memory (`remote`),
+   exactly as a LAN guest or a dedicated server's player does. This is what players run. Open
+   `[server-thread]` issues list the gaps left.
+2. **In-frame (`--in-frame`, `--no-server-thread` or `HORIZON_SERVER_THREAD=0`): DEPRECATED, never use it, it
+   will be removed soon.** The window's `Game` ticks the world itself, one level that follows the player
+   (`fn enter_dimension`). Compatibility does not matter: don't add features or fixes for it, don't write new
+   tests against it, and move code off it when you touch it. The deterministic rule fixtures still run on it
+   until they are ported.

-Single player, LAN guests and dedicated servers all run the server code, so a fix there serves all three.
-Test the server thread when you touch player-facing gameplay:
+LAN guests and dedicated servers always use the server code, so a fix there serves both. Test the server
+thread when you touch player-facing gameplay:

 ```sh
 cargo run --profile fast -p horizon-client -- --resources .local/horizon-client/26.3 --world T               # server thread
@@ -5,8 +5,7 @@ everything is that **it plays exactly like vanilla**. This page is the short ver
 welcome on [Discord](https://discord.gg/playhorizon).

 This repository holds the game and the launcher, plus the tools, tests and docs that build, check and release them.
-The website (playhorizon.dev) is built in a separate repository from this one's README, `docs/api/` and roadmap. Anything
-else (videos, Discord and other community material) lives elsewhere.
+The website (playhorizon.dev) is built in a separate repository from this one's README, `docs/api/` and roadmap. Anything else (videos, Discord and other community material) lives elsewhere.

 **Where to start: [playhorizon.dev/hub](https://playhorizon.dev/hub).** It shows what is being done now and next
 ([ROADMAP.md](ROADMAP.md) in the repository), the work board, good first tasks, and the forms to report a bug or
@@ -15,25 +14,23 @@ queue (the hub, or `/suggest` on Discord) rather than to issues, which are for b

 ## Build it

- **Prerequisites:** Rust (stable), Python 3.10+, JDK 25, and on Linux the ALSA and udev headers
-  (`libasound2-dev libudev-dev`).
- **Resources:** Horizon never downloads the game; it prepares its resources from your own copy of Minecraft 26.3, as
-  described in [Build from source](README.md#build-from-source).
- **Commands:**
+You need Rust (stable), Python 3.10+, JDK 25, and on Linux the ALSA and udev headers (`libasound2-dev libudev-dev`).
+Horizon never downloads the game: it prepares its resources from your own copy of Minecraft 26.3, as described in
+[Build from source](README.md#build-from-source).

-  ```sh
-  cargo run --release -p horizon-prepare -- --prepare --server-jar ~/Downloads/server.jar
-  cargo run --release -p horizon-client
-  ```
+```sh
+cargo run --release -p horizon-prepare -- --prepare --server-jar ~/Downloads/server.jar
+cargo run --release -p horizon-client
+```

- **Launcher:** its own Cargo workspace in `launcher/` (`cd launcher && cargo run`; on NixOS, `nix-shell` first).
+The launcher is its own Cargo workspace in `launcher/` (`cd launcher && cargo run`; on NixOS, `nix-shell` first).

 ## Vanilla first

-Wherever vanilla has a feature, vanilla is the specification, down to the order of random calls. "Parity" here means
-Horizon gives the same results as the pinned 26.3 client and server for the same inputs, checked by a **harness**: a
-`tools/test_*_parity.py` script that runs a small Java oracle against the real game and a Rust probe against Horizon,
-and compares their outputs. There are about 290 of them.
+Wherever vanilla has a feature, vanilla is the specification, down to the order of random calls. "Parity" here
+means Horizon gives the same results as the pinned 26.3 client and server for the same inputs, checked by a
+**harness**: a `tools/test_*_parity.py` script that runs a small Java oracle against the real game and a Rust
+probe against Horizon, and compares their outputs. There are about 290 of them.

 - **Read the vanilla code before writing Horizon's.** `tools/rea_vanilla.py` queries the pinned game bytecode:
  `python3 tools/rea_vanilla.py method net.minecraft.world.level.block.DispenserBlock dispenseFrom`.
@@ -44,10 +41,11 @@ and compares their outputs. There are about 290 of them.
  off by default wherever they would change the vanilla look.
 - **Everything players run is Rust.** Python and Java are fine for dev tools and harness drivers in `tools/`, never
  for player-facing code.
- **No game files in the repo.** Never commit game files, decompiled source or prepared resources (`.local/`):
-  `tools/check_public_tree.py` rejects them (`git config core.hooksPath .githooks` runs it before every commit).
-  The pre-push hook checks the full history reachable from the branches and tags being pushed. Run
-  `python3 tools/check_public_tree.py --history` to audit the history of all local refs.
+
+Never commit game files, decompiled source or prepared resources (`.local/`): `tools/check_public_tree.py` rejects
+them (`git config core.hooksPath .githooks` runs it before every commit).
+The pre-push hook checks the full history reachable from the branches and tags being pushed. Run
+`python3 tools/check_public_tree.py --history` to audit the history of all local refs.

 ## Only original code, or code whose license allows it

@@ -56,23 +54,24 @@ another project's source may also be read and used, **only when that project's l

 - **Allowed:** MIT, MIT-0, BSD-2-Clause, BSD-3-Clause, 0BSD, ISC, zlib, Apache-2.0, Unlicense, and the CC0-1.0
  public-domain dedication. That code may be read, copied or adapted.
- **Off limits, even to read:** GPL, LGPL (Iris), AGPL, MPL, EPL, Polyform (Sodium), the Creative Commons licenses
-  (CC BY, CC BY-SA, CC BY-NC and the others; CC0 is a public-domain dedication, not one of them), custom or
-  "source available" licenses, all rights reserved (OptiFine), and any project with no license or an unclear one.
-  Don't read, copy, translate or paraphrase their source, and don't send code an AI tool wrote from it. Being able
-  to download a mod or a pack does not give you the right to read its files.
+- **Everything else is off limits, even to read:** GPL, LGPL (Iris), AGPL, MPL, EPL, Polyform (Sodium), the Creative
+  Commons licenses (CC BY, CC BY-SA, CC BY-NC and the others; CC0 is a public-domain dedication, not one of them),
+  custom or "source available" licenses, all rights reserved (OptiFine), and any project with no license or an
+  unclear one. Don't read, copy, translate or paraphrase their source, and don't send code an AI tool
+  wrote from it. Being able to download a mod or a pack does not give you the right to read its files.
 - **Check the license yourself.** Read the LICENSE file at the commit you use and the header of each file you take:
-  some repositories mix licenses, and a file under another license is off limits. A license that changed: the one at
-  your commit counts. In doubt, don't: ask in #contributors first.
+  some repositories mix licenses, and a file under another license is off limits. A license that changed: the one
+  at your commit counts. In doubt, don't: ask in #contributors first.
 - **Say it in the pull request:** the project, a link to the commit, its license, and what you read or copied. A
  pull request that used another project's source without saying so is closed.
 - **Copied or adapted code** keeps its copyright line and license notice at the top of the file, and gets an entry
  in [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md). Apache-2.0 code also keeps its NOTICE text and says what
  was changed.

-User documentation and file formats are fine to read, and packs and mods are fine to run and observe, whatever their
-license. Shader packs are a clean-room rewrite of the pack format, produced from a written description of it (see
-#1561); they carry no foreign source, and the rules above still apply to anything you read while working on them.
+User documentation and file formats are fine to read, and packs and mods are fine to run and observe, whatever
+their license. Shader packs were removed on 24 October 2026 (#1561) because their code had been written from
+another project's source; they come back only as a clean-room rewrite from a written description of the pack
+format.

 ## Before asking for review

@@ -88,8 +87,8 @@ your change can affect. Without the vanilla data on your machine it lists those
 `--quick` skips the harnesses. It exits non-zero when something fails.

 For the game workspace, Clippy checks all targets of the touched crates and their transitive workspace dependents,
-including examples. The dependency scope includes optional, platform, build and development dependencies. Tests run
-library, binary, integration and doc tests without building unrelated example executables. Shared Cargo
+including examples. The dependency scope includes optional, platform, build and development dependencies.
+Tests run library, binary, integration and doc tests without building unrelated example executables. Shared Cargo
 configuration and toolchain changes select the whole workspace; CI also keeps its workspace-wide checks.

 ## Claim before you start
@@ -97,8 +96,7 @@ configuration and toolchain changes select the whole workspace; CI also keeps it
 Work is tracked in GitHub issues, and an issue that is assigned is taken (so is one with the `in progress` label:
 claimed on Discord with Kira's `/claim`): pick another, or ask its holder in the thread. Before you start, comment
 **`/claim`** on the issue; you are assigned at once, no role needed. No issue for your work yet? Open one (a line is
-enough), then claim it. `/unclaim` gives it back. Issues labelled `tracker`, `proposal` or `not claimable` aren't
-claimed whole: claim one of the issues a tracker lists, or open one for the part you take.
+enough), then claim it. `/unclaim` gives it back.

 A claim with no open pull request linking the issue (`Fixes #123` in the description, or a draft) is released after
 5 days, with a comment: open a draft early. You can hold 8 open issues at a time, not counting the ones your
@@ -115,17 +113,13 @@ it (edited on every push, never repeated): talk to its author in the thread befo
  can see.
 - **Tick "Allow edits by maintainers".** When something small is left (a lint, a rebase, a nit) we push the fixup
  ourselves instead of sending it back to you; only design questions come back.
- **Once we've pushed to your branch, merge main into it; don't rebase or force-push.** A rebase or force-push
-  replaces our commits with yours and erases the fixes we added (it happened on #5188 and #5203). Tell your agent
-  too: `git merge origin/main`, never `git rebase` or `git push --force` on a branch a maintainer has touched. If
-  our fixes get erased anyway, we finish the work in our own pull request that keeps your commits and credits you.
 - **Tick its kind** in the template: `parity` (Horizon now does what vanilla does), `bug` (a crash or breakage),
  `perf`, `feature` (new for players), `extra` (Horizon-only, off by default), `tooling` or `docs`. A workflow sets
  that label, and area labels (`launcher`, `mobs`, `worldgen`, `rendering`...) from the paths you change.
  `label:parity` is the list of real progress toward vanilla.
 - **Release labels** (we set them if you can't): `feature` also puts it under "New" in the release notes,
-  `skip-release` when players see no change (tooling, docs, tests), nothing for a fix. `release-now` is for crash
-  fixes that shouldn't wait. pr_ready suggests one.
+  `skip-release` when players see no change (tooling, docs, tests), nothing for a fix.
+  `release-now` is for crash fixes that shouldn't wait. pr_ready suggests one.

 Who reviews and merges: the Horizon Team, on CI for ordinary pull requests; risky ones (saves, network, world
 generation, the launcher's updates) wait for a local proof first ([merging](docs/release-flow.md#merging)).
@@ -1,25 +1,19 @@
 [workspace]
-exclude = ["launcher", "crates/horizon-telemetry-server", "crates/horizon-mod-registry", "third_party/wgpu-hal", "third_party/naga", "third_party/libmimalloc-sys"]
+exclude = ["launcher", "crates/horizon-telemetry-server", "crates/horizon-mod-registry", "third_party/wgpu-hal"]
 members = [
    "crates/horizon-core",
    "crates/horizon-dualsense",
-    "crates/horizon-narrator",
    "crates/horizon-threads",
    "crates/horizon-hdr",
    "crates/horizon-world",
    "crates/horizon-client",
-    "crates/horizon-client-lib",
    "crates/horizon-client-core",
    "crates/horizon-client-input",
    "crates/horizon-client-render",
-    "crates/horizon-cosmetics",
    "crates/horizon-command",
    "crates/horizon-items",
    "crates/horizon-server-files",
    "crates/horizon-anticheat",
-    "crates/horizon-chat-filter",
-    # The Model Context Protocol, shared by horizon-ctl, horizon-server and the launcher.
-    "crates/horizon-mcp",
    "crates/horizon-server",
    "crates/horizon-bots",
    "crates/horizon-assets",
@@ -31,12 +25,9 @@ members = [
    "crates/horizon-friends",
    "crates/horizon-relay",
    "crates/horizon-mods",
-    "crates/horizon-mod-api-gen",
-    "crates/horizon-mod-api-gen/dispatch-tests",
    "crates/cargo-horizon-mod",
    "crates/horizon-port-pack",
    "crates/horizon-shaders",
-    "crates/horizon-optifine",
    "crates/horizon-shader-api",
    "crates/horizon-release-sign",
    "xtask",
@@ -68,12 +59,6 @@ large_enum_variant = "allow"
 # Drop this and the folder once a wgpu release has these fixes.
 [patch.crates-io]
 wgpu-hal = { path = "third_party/wgpu-hal" }
-# naga 30.0.1, with the fixes to its GLSL frontend that shader packs need (THIRD_PARTY_NOTICES.md).
-naga = { path = "third_party/naga" }
-# libmimalloc-sys 0.1.49 whose mimalloc v3 counts bits without POPCNT when MSVC builds it: the
-# game died before main on CPUs without it (Core 2, #7264; THIRD_PARTY_NOTICES.md). Drop this and
-# the folder once a libmimalloc-sys release has microsoft/mimalloc#1291's fix.
-libmimalloc-sys = { path = "third_party/libmimalloc-sys" }

 # Line tables keep file:line in backtraces; full debug info made every
 # example and test binary hundreds of megabytes and slow to link.
@@ -7,7 +7,7 @@
  <img src="https://img.shields.io/badge/Minecraft-Java%2026.3-5D9C3F" alt="Minecraft Java 26.3">
  <img src="https://img.shields.io/badge/Rust-stable-B7410E?logo=rust&logoColor=white" alt="Rust">
  <img src="https://img.shields.io/badge/vanilla%20parity-100%25-F0795A" alt="Vanilla parity 100%">
-  <a href="#project-status"><img src="https://img.shields.io/badge/player--visible%20gaps-0%20open-F0795A" alt="Player-visible gaps open"></a>
+  <a href="#project-status"><img src="https://img.shields.io/badge/player--visible%20gaps-833%20open-F0795A" alt="Player-visible gaps open"></a>
  <img src="https://img.shields.io/badge/platform-Linux%20%7C%20macOS%20%7C%20Windows-2A2470" alt="Linux, macOS and Windows">
  <a href="LICENSE"><img src="https://img.shields.io/badge/license-MIT-3B2F7E" alt="MIT license"></a>
 </p>
@@ -122,13 +122,13 @@ It runs rustfmt, clippy, the touched crates' tests, the Python tests, the public

 ## Project status

-**Player-visible gaps: 0 open** of the 833 the [port ledger](tools/port_ledger.py) found, reading every vanilla 26.3 method against Horizon's code: vanilla behaviour a player would notice that Horizon doesn't have yet. By area: Animals [0](https://github.com/horizon-rust/horizon/issues/3512); Monsters and bosses [0](https://github.com/horizon-rust/horizon/issues/3513); Entities, projectiles, vehicles and decorations [0](https://github.com/horizon-rust/horizon/issues/3514); Items, enchantments and inventories [0](https://github.com/horizon-rust/horizon/issues/3515); Blocks, redstone and fluids [0](https://github.com/horizon-rust/horizon/issues/3516); World, world generation and saves [0](https://github.com/horizon-rust/horizon/issues/3517); Screens, HUD and client packets [0](https://github.com/horizon-rust/horizon/issues/3518); Entity and block rendering, models [0](https://github.com/horizon-rust/horizon/issues/3519); Server and players on the server [0](https://github.com/horizon-rust/horizon/issues/3520); Mob AI, villagers and raids [0](https://github.com/horizon-rust/horizon/issues/3521). This number goes down as gaps close (`tools/parity_gaps.py`); the harness results below say that what is tested matches.
+**Player-visible gaps: 833 open** of the 833 the [port ledger](tools/port_ledger.py) found, reading every vanilla 26.3 method against Horizon's code: vanilla behaviour a player would notice that Horizon doesn't have yet. By area: Screens, HUD and client packets [197](https://github.com/horizon-rust/horizon/issues/3518); Entity and block rendering, models [129](https://github.com/horizon-rust/horizon/issues/3519); Animals [110](https://github.com/horizon-rust/horizon/issues/3512); Server and players on the server [106](https://github.com/horizon-rust/horizon/issues/3520); Blocks, redstone and fluids [86](https://github.com/horizon-rust/horizon/issues/3516); Entities, projectiles, vehicles and decorations [64](https://github.com/horizon-rust/horizon/issues/3514); Monsters and bosses [53](https://github.com/horizon-rust/horizon/issues/3513); Mob AI, villagers and raids [35](https://github.com/horizon-rust/horizon/issues/3521); World, world generation and saves [32](https://github.com/horizon-rust/horizon/issues/3517); Items, enchantments and inventories [21](https://github.com/horizon-rust/horizon/issues/3515). This number goes down as gaps close (`tools/parity_gaps.py`); the harness results below say that what is tested matches.

 The table is the project's own audit: every subsystem matches vanilla in every harness that compares it. 100% means 100% of what the harnesses compare, not that nothing else differs.

 ### Java parity: 100%

-Scores: 0 (absent), 0.25 (started), 0.5 (playable, major features missing), 0.75 (mostly complete) or 1 (complete and verified by differential tests); the percentage is their average. Last audited 2026-10-13: the harnesses pass on Linux and macOS. The [port ledger](tools/port_ledger.py) adds a method-by-method view of what is ported.
+Scores: 0 (absent), 0.25 (started), 0.5 (playable, major features missing), 0.75 (mostly complete) or 1 (complete and verified by differential tests); the percentage is their average. Last audited 2026-10-13: all 281 harnesses pass on Linux and macOS. The [port ledger](tools/port_ledger.py) adds a method-by-method view of what is ported.

 | Subsystem | Score | Main gaps |
 | --- | ---: | --- |
@@ -92,7 +92,7 @@ Owner: [ludovic111](https://github.com/ludovic111) · Tracking: [#3914](https://

 <details><summary>Technical</summary>

-Since [#1514](https://github.com/horizon-rust/horizon/issues/1514) single player runs on the server thread (`game/integrated.rs`) and the window joins it as a client. The open `[server-thread]` issues list the gaps. In review: breeding's advancement and statistic ([#3873](https://github.com/horizon-rust/horizon/issues/3873)), the client's menu when the server replaces the player ([#3841](https://github.com/horizon-rust/horizon/issues/3841)), splashes when falling in water ([#3621](https://github.com/horizon-rust/horizon/issues/3621)). [docs/server-levels.md](docs/server-levels.md).
+Since [#1514](https://github.com/horizon-rust/horizon/issues/1514) single player runs on the server thread (`game/integrated.rs`) and the window joins it as a client; `--in-frame` keeps the old path. The open `[server-thread]` issues list the gaps. In review: breeding's advancement and statistic ([#3873](https://github.com/horizon-rust/horizon/issues/3873)), the client's menu when the server replaces the player ([#3841](https://github.com/horizon-rust/horizon/issues/3841)), splashes when falling in water ([#3621](https://github.com/horizon-rust/horizon/issues/3621)). [docs/server-levels.md](docs/server-levels.md).

 </details>

@@ -234,11 +234,11 @@ Client-of-a-server fixes in `game/remote*.rs` and `horizon-protocol`: mobs' aggr

 #### One single-player path: remove the in-frame world

-Single player has one way to run, the server thread, so every fix works everywhere and there are fewer bugs. The older in-frame mode is removed.
+Single player will have one way to run, the server thread, so every fix works everywhere and there are fewer bugs. The older in-frame mode goes once everything passes without it.

 <details><summary>Technical</summary>

-`--in-frame` (also `--no-server-thread` and `HORIZON_SERVER_THREAD=0`) ticked the world inside the window's `Game`. [#6473](https://github.com/horizon-rust/horizon/issues/6473) removes it with the code only it reached (the window's world loader and player tick, its portal travel and loading screen, the in-frame LAN host); the harnesses run on the server thread. See also 'Single player as a server' and [docs/server-levels.md](docs/server-levels.md).
+`--in-frame` (also `--no-server-thread` and `HORIZON_SERVER_THREAD=0`) still ticks the world inside the window's `Game`, and most harnesses test that path. Delete it once `lan_e2e --server-thread` and the parity harnesses pass on the server thread, which also halves the bug surface. See also 'Single player as a server' and [docs/server-levels.md](docs/server-levels.md).

 </details>

@@ -634,6 +634,16 @@ A spike with ray-traced sun shadows, off by default, is a draft ([#1180](https:/

 </details>

+#### HDR monitors
+
+Output for HDR monitors: brighter highlights and richer colour where your screen supports it.
+
+<details><summary>Technical</summary>
+
+Issue [#1441](https://github.com/horizon-rust/horizon/issues/1441). Needs a surface format and a tone-mapping path per backend, and tests on real HDR screens on Windows, macOS and Linux.
+
+</details>
+
 #### MSAA, anisotropic filtering, exclusive fullscreen

 More graphics options: multisample anti-aliasing, anisotropic filtering and an exclusive fullscreen mode. Today Horizon has FXAA and borderless fullscreen.
@@ -732,13 +742,13 @@ Open: the GUI Scale is clamped to 2 after a restart under Hyprland, while XWayla

 </details>

-#### A Nix flake
+#### AppImage and a Nix flake

-Install Horizon on NixOS through a Nix flake.
+Install Horizon on any Linux distribution as an AppImage, and on NixOS through a Nix flake.

 <details><summary>Technical</summary>

-A player's idea (#horizon-ideas). The launcher's AppImage ships with each launcher release ([packaging/linux/appimage.sh](packaging/linux/appimage.sh)): one file with the libraries GPUI needs, which replaces itself when it updates. A flake.nix packaging the release binaries with their runtime libraries (Vulkan loader, X11/Wayland, ALSA) is still missing, the way horizon-parity's NixOS setup runs them today.
+A player's idea (#horizon-ideas). An AppImage of the launcher and game from the release workflow, and a flake.nix packaging the release binaries with their runtime libraries (Vulkan loader, X11/Wayland, ALSA), the way horizon-parity's NixOS setup runs them today.

 </details>

@@ -894,7 +904,6 @@ Armour and tools in End city chests should come enchanted, as in vanilla.
 - **Discord Rich Presence** (v0.2.58): Your Discord profile can show that you are playing Horizon, with a switch to turn it off. [#1787](https://github.com/horizon-rust/horizon/issues/1787) · [#1788](https://github.com/horizon-rust/horizon/issues/1788)
 - **Server dialogs and login screens** (v0.2.67): Servers that show dialogs, such as the register and login screens of AuthMe, will work in Horizon. [#1720](https://github.com/horizon-rust/horizon/issues/1720) · [#1734](https://github.com/horizon-rust/horizon/issues/1734) · [#1735](https://github.com/horizon-rust/horizon/issues/1735)
 - **Microsoft sign-in** (launcher@0.2.17): Sign in with your Microsoft account in the launcher to play on online-mode servers. [docs/microsoft-account.md](docs/microsoft-account.md) · [#2879](https://github.com/horizon-rust/horizon/issues/2879)
- **HDR monitors** (v0.2.74): Output for HDR monitors: brighter highlights and richer colour where your screen supports it. [#1441](https://github.com/horizon-rust/horizon/issues/1441) · [#2021](https://github.com/horizon-rust/horizon/issues/2021) · [#2292](https://github.com/horizon-rust/horizon/issues/2292)
 - **OpenGL for old computers** (v0.2.63): Horizon now starts on old PCs whose graphics card has no Vulkan or DirectX 12 driver: it switches to OpenGL by itself, and Options > Graphics can pick OpenGL by hand. [#1917](https://github.com/horizon-rust/horizon/issues/1917) · [#1920](https://github.com/horizon-rust/horizon/issues/1920) · [#1936](https://github.com/horizon-rust/horizon/issues/1936)
 - **Server resource packs** (v0.2.48): Servers can send you their resource pack: Horizon asks, downloads it and applies it, like vanilla. [#1562](https://github.com/horizon-rust/horizon/issues/1562) · [#1569](https://github.com/horizon-rust/horizon/issues/1569) · [#1570](https://github.com/horizon-rust/horizon/issues/1570)
 - **Single player on its own server thread** (v0.2.39): Single player runs on a server thread, as vanilla does, so the world keeps ticking smoothly while the window draws. [#1514](https://github.com/horizon-rust/horizon/issues/1514) · [docs/server-levels.md](docs/server-levels.md)
@@ -8,24 +8,6 @@ developers, with upstream fixes applied
 [gfx-rs/wgpu#10714](https://github.com/gfx-rs/wgpu/pull/10714)). It is licensed under MIT or
 Apache-2.0; both licenses are in that folder (`LICENSE.MIT`, `LICENSE.APACHE`).

-## naga
-
-`third_party/naga` is [naga](https://github.com/gfx-rs/wgpu) 30.0.1 by the gfx-rs developers, with
-fixes to its GLSL frontend that shader packs need, each applied in the commit that needed it. It is licensed under MIT or Apache-2.0; both licenses
-are in that folder (`LICENSE.MIT`, `LICENSE.APACHE`).
-
-The GLSL frontend also resets the common type for each comma-separated declarator so one
-variable's array specifier does not change later variables.
-
-## libmimalloc-sys and mimalloc
-
-`third_party/libmimalloc-sys` is [libmimalloc-sys](https://github.com/purpleprotocol/mimalloc_rust)
-0.1.49 by Octavian Oncescu, with the [mimalloc](https://github.com/microsoft/mimalloc) v3 sources it
-bundles (Copyright (c) 2018-2025 Microsoft Corporation, Daan Leijen), both under the MIT license
-(`LICENSE.txt` and `c_src/mimalloc/v3/LICENSE` in that folder). It holds only the v3 sources. One
-change: `mi_popcount` in `include/mimalloc/bits.h` uses mimalloc's portable bit count on MSVC
-x86/x64 instead of the POPCNT instruction, which CPUs before Nehalem lack (#7264).
-
 ## Pixelify Sans

 `crates/horizon-theme/fonts/PixelifySans-*.ttf` is [Pixelify Sans](https://github.com/eifetx/Pixelify-Sans)
@@ -39,42 +21,32 @@ by The Pixelify Sans Project Authors, licensed under the SIL Open Font License 1
 license (`crates/horizon-theme/icons/pixel/LICENSE-pixelarticons.txt`). `star.svg` is Horizon's own, drawn on
 the same grid.

-## Hugeicons
-
-`crates/horizon-theme/icons/glass/*.svg` are icons from the free set of
-[Hugeicons](https://github.com/hugeicons/hugeicons) (`@hugeicons/core-free-icons` 4.4.0), under
-the MIT license (`crates/horizon-theme/icons/glass/LICENSE-hugeicons.txt`), exported with a 1.6
-stroke in `currentColor`.
-
-`crates/horizon-theme/icons/glass/discord.svg` is Discord's logo as drawn by
-[Simple Icons](https://github.com/simple-icons/simple-icons) 13.21.0 (CC0 1.0). The logo is Discord's
-trademark, used only on the button that opens Horizon's Discord server.
-
 ## AMD FidelityFX SDK (FSR 3.1 frame generation)

-`crates/horizon-client-render/src/gfx/frame_gen/optical_flow.wgsl` and `interpolation.wgsl` are
-ports to WGSL of the optical flow and frame interpolation shaders of the
-[AMD FidelityFX SDK](https://github.com/GPUOpen-LibrariesAndSDKs/FidelityFX-SDK) 1.1.4
-(`sdk/include/FidelityFX/gpu/{opticalflow,frameinterpolation}`, at commit
+`crates/horizon-client-render/src/gfx/frame_gen/optical_flow.wgsl` is a port to WGSL of the
+optical flow shaders of the [AMD FidelityFX SDK](https://github.com/GPUOpen-LibrariesAndSDKs/FidelityFX-SDK)
+1.1.4 (`sdk/include/FidelityFX/gpu/opticalflow`, at commit
 [c6efa6bf7f20](https://github.com/GPUOpen-LibrariesAndSDKs/FidelityFX-SDK/tree/c6efa6bf7f2027b3ec94f28578bb5965eabb9e55)),
 and `optical_flow.rs` follows the SDK's `sdk/src/components/opticalflow/ffx_opticalflow.cpp`
 (its passes, their order and their dispatch sizes). Copyright (C) 2024 Advanced Micro Devices,
-Inc., under the MIT license, whose text heads each file. AMD and FidelityFX are AMD's
+Inc., under the MIT license, whose text heads both files. AMD and FidelityFX are AMD's
 trademarks; Horizon is not affiliated with AMD.

 ## Mod loader logos

-The launcher shows the logo of the mod loader an instance plays with, and offers the logos as
-instance icons.
+The launcher shows the logo of the mod loader an instance plays with.

- `launcher/assets/logos/{fabric,quilt,neoforge,forge}.png` are the loaders' logos as the launcher
-  mockup on [playhorizon.dev/launcher](https://playhorizon.dev/launcher) shows them (horizon-site
-  `public/media/launcher/*.webp`, converted to PNG), each its project's own mark:
-  [Fabric](https://fabricmc.net/), [Quilt](https://quiltmc.org/) (its art is
-  [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/)),
-  [NeoForged](https://neoforged.net/) (its art, by Ridanisaurus, is
-  [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/)) and
-  [Minecraft Forge](https://minecraftforge.net/). They name the loader an instance runs.
+- `launcher/assets/logos/quilt.png` is the Quilt mini icon (`brand/128png/quilt_mini_icon_transparent.png`)
+  from [QuiltMC/art](https://github.com/QuiltMC/art), by the Quilt Project, dedicated to the public
+  domain under [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/).
+- `launcher/assets/logos/neoforge.png` is NeoForged's icon (`art/neoforged_icon_16x16.png`) from
+  [neoforged/.github](https://github.com/neoforged/.github/tree/main/art), © the NeoForged team,
+  created by Ridanisaurus, under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). It is
+  unmodified (the launcher scales it up by whole pixels).
+- Fabric's and Forge's icons are not shipped: neither publishes a license for its logo. The launcher
+  fetches them from their own sites when an instance needs them
+  ([fabric-loader's icon](https://github.com/FabricMC/fabric-loader/blob/master/src/main/resources/assets/fabricloader/icon.png),
+  [files.minecraftforge.net's](https://files.minecraftforge.net/)).

 Each logo belongs to its project. Showing it says which loader an instance runs; it does not mean
 the project endorses Horizon.
@@ -87,84 +59,3 @@ with Microsoft accounts
 The four-square Microsoft symbol in `launcher/src/microsoft.rs` reproduces the squares, positions and
 colours of Microsoft's official `ms-symbollockup_mssymbol_19.svg` from that page, unmodified. Microsoft
 and its logo are trademarks of the Microsoft group of companies; Horizon is not endorsed by Microsoft.
-
-## CIT Resewn
-
-`crates/horizon-optifine/src/cit.rs` and `crates/horizon-client-render/src/cit.rs` follow the
-condition semantics of [CIT Resewn Continuation](https://github.com/EthanVisagie/CIT-Resewn-Continuation-1.21.11)
-(at `b792f9a`), a continuation of [CIT Resewn](https://github.com/SHsuperCM/CITResewn) by SHsuperCM: the
-1.21 component paths, enchantment levels, percent damage, text matching and rule ordering. It is
-licensed under the MIT license:
-
-> Copyright (c) 2021 SHsuperCM
->
-> 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.
-
-## FusionExamples
-
-The tile tables in `crates/horizon-optifine/src/fusion/layout.rs` were read off the connecting
-texture templates (`templates/template <layout>.png`) of
-[FusionExamples](https://github.com/SuperMartijn642/FusionExamples) (at `8c9c56e`), which is
-licensed under the MIT license:
-
-> Copyright (c) 2024 Martijn van den Brand
->
-> 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.
-
-## BlueMap
-
-`crates/horizon-client-render/src/bluemap.rs` reads the lowres tiles of a server's
-[BlueMap](https://github.com/BlueMap-Minecraft/BlueMap) web map. It follows three of BlueMap's files:
-`core/src/main/java/de/bluecolored/bluemap/core/map/lowres/LowresLayer.java` (`saveTile`) for the
-tiles' pixel layout, `common/webapp/src/js/util/Utils.js` (`pathFromCoords`) for their paths, and
-`core/src/main/java/de/bluecolored/bluemap/core/map/MapSettingsSerializer.java` for a map's
-`settings.json`, at commit
-[96ae320d1d39](https://github.com/BlueMap-Minecraft/BlueMap/tree/96ae320d1d39581c10058d8222f2290f2fcb5333).
-BlueMap is licensed under the MIT license:
-
-> Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
-> Copyright (c) contributors
->
-> 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.
@@ -1,9 +1,9 @@
 #!/usr/bin/env python3
 """Server load bench: the same horizon-bots load on Horizon, vanilla 26.3 or Pumpkin.

-    python3 tools/bench.py --server horizon --exe target/release/horizon-server --bots 50
-    python3 tools/bench.py --server vanilla --jar ~/mc/server.jar --bots 50 --pre-generated ~/worlds/seed12345
-    python3 tools/bench.py --server pumpkin --exe ./pumpkin --bots 50
+    python3 bench/bench.py --server horizon --exe target/release/horizon-server --bots 50
+    python3 bench/bench.py --server vanilla --jar ~/mc/server.jar --bots 50 --pre-generated ~/worlds/seed12345
+    python3 bench/bench.py --server pumpkin --exe ./pumpkin --bots 50

 Every run uses a fresh scratch folder (bound to 127.0.0.1, offline, creative so the bots can fly), starts the
 server, lets `horizon-bots` join one every --join-every seconds, warms up, then measures for --seconds:
@@ -39,11 +39,6 @@ import tempfile
 import threading
 import time

-try:
-    from . import lab
-except ImportError:
-    import lab
-
 ROOT = Path(__file__).resolve().parent.parent
 EXE = '.exe' if os.name == 'nt' else ''
 SERVERS = ('horizon', 'vanilla', 'pumpkin')
@@ -212,7 +207,8 @@ class Server:
        self.lines = []
        self.lock = threading.Lock()
        self.log = log_path.open('w', encoding='utf-8')
-        env = lab.game_env(HORIZON_HOME=directory / 'horizon-home')
+        env = dict(os.environ, HORIZON_NO_AUDIO='1', HORIZON_HOME=str(directory / 'horizon-home'),
+                   HORIZON_LAUNCHER_NO_SELF_UPDATE='1')
        self.process = subprocess.Popen([str(c) for c in command], cwd=directory, stdin=subprocess.PIPE,
                                        stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True,
                                        encoding='utf-8', errors='replace', env=env)
@@ -1,27 +0,0 @@
-# Particle culling review measurements — 2026-11-02
-
-Ordinary-scene captures and measurements for PR #7054. The scene contains 24 mobs, about 9,400–10,100 rain particles, and about 50–100 campfire smoke particles. Two opposite-order passes were run with 2 s warmup and 8 s measurement per condition. Host: Intel Core i7-3770S, Intel HD Graphics 4000, Vulkan/Mesa, 675×727, render distance 4, VSync off, 260 FPS cap.
-
-These are means of the two samples. CPU is the harness's average CPU time per frame; p99 is frame time. The normal scene is not expected to show large gains because most particles are visible.
-
-| Condition | FPS | CPU ms/frame | Frame p99 ms |
-| --- | ---: | ---: | ---: |
-| Main, culling Off | 88.39 | 1.930 | 23.85 |
-| Particle branch, culling Off | 88.55 | 1.828 | 24.88 |
-| Main, Entity Culling Synchronous | 89.12 | 1.887 | 23.07 |
-| Particle branch, Entity Culling Synchronous, Particle Culling Off | 89.06 | 1.897 | 25.18 |
-| Particle Culling Synchronous | 88.87 | 1.774 | 24.94 |
-| Particle Culling Asynchronous* | 89.00 | 1.754 | 24.90 |
-
-*The asynchronous samples predate the final switch to a dedicated particle worker. They are retained only as historical context and are not a measurement of the final worker implementation. No FPS improvement is claimed from these ordinary-scene runs. The Off path delegates directly to `render`; `disabled_culled_render_matches_the_regular_particle_path` checks that it produces the same vertices.
-
-The FPS and CPU differences are within run-to-run variability for this GPU-limited scene. The first four conditions are the reviewer's requested Main-versus-branch default and existing synchronous-mode comparisons. Particle Sync/Async rows are branch-internal mode comparisons.
-
-## Captures
-
-The screenshots show the same ordinary test world and FPS overlay:
-
- `main-off.png`
- `particle-off.png`
- `particle-sync.png`
- `particle-async.png`
@@ -1,758 +0,0 @@
-{
- "format": "horizon-benchmark-report",
- "version": 1,
- "kind": "game",
- "created": "2026-11-01T22:55:52Z",
- "app": {
-  "name": "horizon-client",
-  "version": "0.1.0",
-  "commit": "1bd24e4042"
- },
- "hardware": {
-  "os": "macos",
-  "arch": "aarch64",
-  "cpu_threads": 14,
-  "os_version": "27.0.1",
-  "cpu": "Apple M4 Pro",
-  "ram_mb": 65536,
-  "gpu": {
-   "name": "Apple M4 Pro",
-   "vendor": "",
-   "driver": "",
-   "backend": "metal",
-   "kind": "integrated"
-  }
- },
- "conditions": {
-  "scenario": "perf_bench:village,forest,ocean,mountain",
-  "seed": "1234",
-  "render_distance": 16,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": true,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 113.978,
-  "window": [
-   1920,
-   1080
-  ]
- },
- "metrics": {
-  "startup.title_ms": {
-   "n": 3,
-   "mean": 1524.333,
-   "stdev": 364.142,
-   "min": 1112.127,
-   "max": 1802.295,
-   "ci95": 904.651
-  },
-  "startup.world_ms": {
-   "n": 3,
-   "mean": 14001.774,
-   "stdev": 8119.623,
-   "min": 7466.904,
-   "max": 23091.569,
-   "ci95": 20171.889
-  },
-  "chunks.village.load_ms": {
-   "n": 3,
-   "mean": 8159.696,
-   "stdev": 3897.327,
-   "min": 5313.528,
-   "max": 12601.663,
-   "ci95": 9682.279
-  },
-  "chunks.village.meshed_count": {
-   "n": 3,
-   "mean": 25431.333,
-   "stdev": 1389.728,
-   "min": 24149.0,
-   "max": 26908.0,
-   "ci95": 3452.555
-  },
-  "fps.village.avg_fps": {
-   "n": 3,
-   "mean": 568.391,
-   "stdev": 11.948,
-   "min": 558.517,
-   "max": 581.673,
-   "ci95": 29.684
-  },
-  "fps.village.low_1pct_fps": {
-   "n": 3,
-   "mean": 270.644,
-   "stdev": 9.955,
-   "min": 259.156,
-   "max": 276.728,
-   "ci95": 24.732
-  },
-  "fps.village.low_01pct_fps": {
-   "n": 3,
-   "mean": 209.951,
-   "stdev": 30.24,
-   "min": 191.819,
-   "max": 244.86,
-   "ci95": 75.126
-  },
-  "chunks.forest.load_ms": {
-   "n": 3,
-   "mean": 8879.707,
-   "stdev": 1758.259,
-   "min": 7205.686,
-   "max": 10711.562,
-   "ci95": 4368.11
-  },
-  "chunks.forest.meshed_count": {
-   "n": 3,
-   "mean": 29366.667,
-   "stdev": 273.35,
-   "min": 29053.0,
-   "max": 29554.0,
-   "ci95": 679.094
-  },
-  "fps.forest.avg_fps": {
-   "n": 3,
-   "mean": 333.026,
-   "stdev": 1.469,
-   "min": 331.478,
-   "max": 334.4,
-   "ci95": 3.649
-  },
-  "fps.forest.low_1pct_fps": {
-   "n": 3,
-   "mean": 193.014,
-   "stdev": 11.504,
-   "min": 185.57,
-   "max": 206.264,
-   "ci95": 28.58
-  },
-  "fps.forest.low_01pct_fps": {
-   "n": 3,
-   "mean": 137.067,
-   "stdev": 28.701,
-   "min": 108.337,
-   "max": 165.738,
-   "ci95": 71.302
-  },
-  "chunks.ocean.load_ms": {
-   "n": 3,
-   "mean": 6399.435,
-   "stdev": 2268.592,
-   "min": 4346.111,
-   "max": 8834.786,
-   "ci95": 5635.949
-  },
-  "chunks.ocean.meshed_count": {
-   "n": 3,
-   "mean": 25436.0,
-   "stdev": 813.154,
-   "min": 24718.0,
-   "max": 26319.0,
-   "ci95": 2020.149
-  },
-  "fps.ocean.avg_fps": {
-   "n": 3,
-   "mean": 411.986,
-   "stdev": 1.42,
-   "min": 410.981,
-   "max": 413.61,
-   "ci95": 3.527
-  },
-  "fps.ocean.low_1pct_fps": {
-   "n": 3,
-   "mean": 209.307,
-   "stdev": 10.427,
-   "min": 197.391,
-   "max": 216.759,
-   "ci95": 25.905
-  },
-  "fps.ocean.low_01pct_fps": {
-   "n": 3,
-   "mean": 126.88,
-   "stdev": 17.642,
-   "min": 106.534,
-   "max": 137.93,
-   "ci95": 43.829
-  },
-  "chunks.mountain.load_ms": {
-   "n": 3,
-   "mean": 14672.976,
-   "stdev": 9832.9,
-   "min": 8230.723,
-   "max": 25990.951,
-   "ci95": 24428.25
-  },
-  "chunks.mountain.meshed_count": {
-   "n": 3,
-   "mean": 27715.0,
-   "stdev": 1706.033,
-   "min": 26572.0,
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-{
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- "version": 1,
- "kind": "game",
- "created": "2026-11-01T23:17:23Z",
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-   "vendor": "",
-   "driver": "",
-   "backend": "metal",
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-{
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- "kind": "game",
- "created": "2026-11-01T22:55:52Z",
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-   "driver": "",
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- "label": "horizon-m4pro-1080p"
-}
@@ -1,68 +0,0 @@
-# Horizon main vs vanilla 26.3 on a loaded Mac mini M4 Pro (2026-11-01)
-
-`tools/perf_bench.py` reports for Horizon main 1bd24e4042, vanilla 26.3 and vanilla with performance mods, render distances
-8, 16 and 32, three games each, every game from a fresh world. **These are not player numbers:** the Mac mini was running other
-work the whole time (1-minute load average 15-114 on 14 cores), and every game rendered without presenting. They are kept because
-they're the first Mac reports and show how each game behaves under heavy CPU contention. The reports are the
-`*-m4pro-1080p-rd*.json` files next to this page.
-
-## Setup
-
- **Machine:** Mac mini, Apple M4 Pro (10 performance + 4 efficiency cores, 20-core GPU), 64 GB, macOS 27.0.1. Screen
-  1920x1080; the session was locked, so every game ran `offscreen` (Horizon renders into a texture; vanilla draws into a
-  window nobody sees).
- **Horizon:** main 1bd24e4042, `cargo build --release -p horizon-client`, Metal.
- **Vanilla:** the 26.3 client jar with Fabric Loader and the driver mod, Java 25 (Temurin), `-Xmx2G` with the launcher's G1
-  flags, OpenGL 4.1 (Apple's Metal-backed driver).
- **Vanilla + mods:** the same with Sodium mc26.3-0.9.2, Lithium mc26.3-0.26.2, FerriteCore 9.0.0, ImmediatelyFast 1.17.1 and
-  Fabric API (`tools/benchmark-deps/mods.lock.json`).
- **Order:** the games took turns inside each repeat (vanilla, mods, Horizon; then mods, Horizon, vanilla; then Horizon, vanilla,
-  mods), one game at a time.
-
-## Why these numbers aren't a fair comparison
-
- **Load.** Load before each game: RD 8 46-82, RD 16 43-114, RD 32 15-59 (the later RD 32 games ran at 15-30). Horizon raises its
-  render and server threads to the user-interactive QoS class, and the JVM's threads stay at the default, so under this
-  contention macOS runs Horizon's frame first. Vanilla's 1% lows of 2-15 FPS show that, more than how fast either game is.
- **Resolution.** Vanilla's 1920x1080 window was shrunk to **1920x930** by the 1080p screen (menu and title bars); Horizon,
-  offscreen, rendered 1920x1080. Vanilla drew 14% fewer pixels, which favours it in GPU-bound scenes. Because the recorded
-  windows differ, `perf_bench.py --table` refuses to compare these reports. The tables below were made with the window check
-  skipped. A rerun at a size that fits the screen (1600x900) would avoid it.
-
-## Results
-
-Mean of 3 games ± 95% confidence interval. FPS over the 12-second flight (average / 1% low / 0.1% low):
-
-| RD | scene | Horizon main | Vanilla 26.3 | Vanilla + mods |
-| --- | --- | --- | --- | --- |
-| 8 | forest | 364 ±22 / 145 ±54 / 97 ±38 | 66 ±22 / 8 ±10 / 6 ±8 | 47 ±42 / 4 ±2 / 3 ±1 |
-| 8 | mountain | 466 ±7 / 165 ±54 / 91 ±37 | 46 ±37 / 5 ±7 / 4 ±6 | 67 ±35 / 8 ±5 / 4 ±4 |
-| 8 | ocean | 410 ±88 / 161 ±39 / 112 ±41 | 50 ±44 / 6 ±13 / 5 ±11 | 35 ±16 / 5 ±4 / 4 ±4 |
-| 8 | village | 540 ±453 / 196 ±189 / 135 ±184 | 42 ±16 / 4 ±3 / 3 ±0 | 33 ±46 / 4 ±6 / 3 ±4 |
-| 16 | forest | 333 ±4 / 193 ±29 / 137 ±71 | 23 ±9 / 2 ±1 / 2 ±1 | 62 ±94 / 10 ±21 / 7 ±14 |
-| 16 | mountain | 357 ±6 / 200 ±30 / 154 ±33 | 44 ±12 / 7 ±2 / 4 ±1 | 36 ±44 / 4 ±5 / 3 ±5 |
-| 16 | ocean | 412 ±4 / 209 ±26 / 127 ±44 | 51 ±16 / 6 ±8 / 4 ±7 | 75 ±159 / 13 ±33 / 7 ±16 |
-| 16 | village | 568 ±30 / 271 ±25 / 210 ±75 | 46 ±110 / 9 ±27 / 7 ±17 | 46 ±45 / 7 ±9 / 5 ±4 |
-| 32 | forest | 165 ±11 / 104 ±51 / 95 ±60 | 68 ±122 / 18 ±49 / 14 ±42 | 114 ±132 / 29 ±44 / 21 ±34 |
-| 32 | mountain | 190 ±5 / 109 ±35 / 91 ±32 | 29 ±19 / 3 ±2 / 2 ±3 | 57 ±49 / 7 ±2 / 3 ±3 |
-| 32 | ocean | 210 ±13 / 129 ±77 / 116 ±98 | 44 ±80 / 5 ±4 / 2 ±1 | 119 ±176 / 32 ±66 / 17 ±37 |
-| 32 | village | 326 ±17 / 152 ±85 / 123 ±84 | 81 ±99 / 15 ±20 / 11 ±11 | 92 ±28 / 13 ±6 / 9 ±3 |
-
-Start to title / in-world, mean scene load, RSS steady / peak, physical footprint steady / peak (macOS `footprint`, which on Apple
-Silicon includes the game's GPU allocations), load average before the first game:
-
-| RD | Horizon main | Vanilla 26.3 | Vanilla + mods |
-| --- | --- | --- | --- |
-| 8 | 7.2 / 11.4, 6.5, 1379 / 1537, 1883 / 2094, 73 | 49.9 / 89.1, 18.2, 1811 / 1877, 2635 / 2709, 66 | 56.3 / 97.7, 17.9, 1927 / 2019, 2396 / 2441, 74 |
-| 16 | 1.5 / 14.0, 9.5, 1617 / 1892, 2495 / 3084, 114 | 19.4 / 78.9, 33.3, 2431 / 2555, 3450 / 3713, 76 | 23.8 / 76.9, 27.1, 2355 / 2566, 3212 / 3431, 70 |
-| 32 | 2.2 / 14.3, 11.1, 2196 / 2537, 4373 / 5560, 28 | 20.6 / 124.2, 44.2, 2838 / 2958, 4265 / 4618, 59 | 13.5 / 63.2, 29.9, 3705 / 4078, 4647 / 5250, 37 |
-
-## What it shows
-
- Horizon is GPU-bound on the M4 Pro in every scene at every distance: its median GPU time per frame is 1.6-2.5 ms at RD 8 and
-  2.9-5.7 ms at RD 32, its render thread's CPU time 0.6-2.2 ms.
- In the least-loaded RD 32 games (load 15-22), vanilla + mods matched Horizon's average FPS over the forest (162 vs 163-170) and
-  the ocean (187 vs 209-216); Horizon's 1% lows were 2.4 times the modded client's there, and 15-17 times over the village and the
-  mountain.
- Horizon's resident memory is 1.2-1.7 times smaller than both clients'. Its physical footprint, GPU memory included, is level
-  with vanilla's at RD 32 (4373 vs 4265 MB steady) and above it at peak (5560 vs 4618 MB).
@@ -1,707 +0,0 @@
-{
- "format": "horizon-benchmark-report",
- "version": 1,
- "kind": "game",
- "created": "2026-11-01T22:55:52Z",
- "app": {
-  "name": "minecraft",
-  "version": "26.3",
-  "mods": [
-   {
-    "name": "fabric-loader",
-    "version": "0.19.5"
-   }
-  ]
- },
- "hardware": {
-  "os": "macos",
-  "arch": "aarch64",
-  "cpu_threads": 14,
-  "os_version": "27.0.1",
-  "cpu": "Apple M4 Pro",
-  "ram_mb": 65536,
-  "gpu": {
-   "name": "Apple M4 Pro",
-   "vendor": "Apple",
-   "driver": "4.1 Metal - 91.7",
-   "backend": "opengl",
-   "kind": ""
-  }
- },
- "conditions": {
-  "scenario": "perf_bench:village,forest,ocean,mountain",
-  "seed": "1234",
-  "render_distance": 16,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": true,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 75.854,
-  "window": [
-   1920,
-   930
-  ]
- },
- "metrics": {
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-   "stdev": 10653.755,
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-   "stdev": 10432.774,
-   "min": 10427.451,
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-  "fps.village.avg_fps": {
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-   "stdev": 44.352,
-   "min": 15.749,
-   "max": 96.497,
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-  "fps.village.low_1pct_fps": {
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-   "stdev": 10.812,
-   "min": 1.86,
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-  "fps.village.low_01pct_fps": {
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-   "stdev": 21806.234,
-   "min": 15037.908,
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-  "fps.forest.avg_fps": {
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-   "mean": 23.347,
-   "stdev": 3.693,
-   "min": 20.154,
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-  "fps.forest.low_1pct_fps": {
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-   "min": 2.196,
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-{
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@@ -1,723 +0,0 @@
-{
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- "version": 1,
- "kind": "game",
- "created": "2026-11-01T23:17:23Z",
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-{
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- "created": "2026-11-01T22:55:52Z",
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-   "backend": "opengl",
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- ],
- "label": "vanilla-mods-m4pro-1080p"
-}
@@ -6,20 +6,9 @@ license.workspace = true
 rust-version = "1.86"
 description = "cargo horizon-mod new/build/run/check: make Horizon content mods (docs/mods.md)"

-# `cargo binstall --git https://github.com/horizon-rust/horizon cargo-horizon-mod` (#2120) reads this: the archive
-# `cargo-horizon-mod`'s workflow attaches to the `cargo-horizon-mod-v<version>` release for the runner's target,
-# holding the binary at its root. tools/horizon_mod_binstall.py expands it for the workflow's targets.
-[package.metadata.binstall]
-pkg-url = "https://github.com/horizon-rust/horizon/releases/download/cargo-horizon-mod-v{ version }/{ name }-{ target }.tar.gz"
-bin-dir = "{ bin }{ binary-ext }"
-pkg-fmt = "tgz"
-
 [dependencies]
 horizon-mods = { path = "../horizon-mods", default-features = false, features = ["index"] }
 serde_json = "1.0.151"

-[dev-dependencies]
-zip = { version = "9.1.3", default-features = false, features = ["deflate"] }
-
 [lints]
 workspace = true
@@ -1,8 +1,7 @@
 //! `cargo horizon-mod`: make Horizon content mods (`docs/modpacks.md`): blocks,
 //! items, data and assets, no code. Code mods are native (docs/native-mods.md).
 //!
-//! - `new <path> [--name "Name"]`: a content mod from the template; with
-//!   `--template native [--horizon <commit>]`, a native trait mod's bundle.
+//! - `new <path> [--name "Name"]`: a content mod from the template.
 //! - `build`: the `.hmod` in `target/horizon-mod/`, with the mod's `assets/`
 //!   and `data/`.
 //! - `run [--game <horizon-client>] [-- <game args>]`: build, then play with
@@ -33,7 +32,7 @@ fn main() -> ExitCode {
        Some("run") => run(&args[1..]),
        Some("check") => check(&args[1..]),
        Some("registry") => registry::main(&args[1..]),
-        _ => Err("usage: cargo horizon-mod new <path> [--name \"Name\"] [--template content|native [--horizon <commit>]] | build | run [--game <horizon-client>] [-- <game args>] | check <file> [--kind <kind>] [--key <public key> --signature <file.minisig>] [--json] | registry build|review|check|list".into()),
+        _ => Err("usage: cargo horizon-mod new <path> [--name \"Name\"] | build | run [--game <horizon-client>] [-- <game args>] | check <file> [--kind <kind>] [--key <public key> --signature <file.minisig>] [--json] | registry build|review|check|list".into()),
    };
    match result {
        Ok(()) => ExitCode::SUCCESS,
@@ -75,11 +74,6 @@ fn new(args: &[String]) -> Result<(), String> {
        .collect();
    let name = flag(args, "--name").map_or_else(|| base.replace(['-', '_'], " "), str::to_string);
    let fill = |t: &str| t.replace("{id}", &id).replace("{name}", &name);
-    match flag(args, "--template") {
-        None | Some("content") => {}
-        Some("native") => return new_native(dir, &id, flag(args, "--horizon"), fill),
-        Some(_) => return Err("--template is content or native".into()),
-    }
    // A block copying a vanilla one, with its model, name, loot, recipe and tag.
    let files = [
        (
@@ -120,6 +114,11 @@ fn new(args: &[String]) -> Result<(), String> {
        ),
        (".gitignore", include_str!("../template/gitignore")),
    ];
+    if flag(args, "--template").is_some_and(|t| t != "content") {
+        return Err(
+            "only content mods are made here: code mods are native (docs/native-mods.md)".into(),
+        );
+    }
    for (file, text) in files {
        let file = fill(file);
        let file = file.as_str();
@@ -138,67 +137,6 @@ fn new(args: &[String]) -> Result<(), String> {
    Ok(())
 }

-/// A native trait mod's bundle in `dir` (docs/native-mods.md, "Trait mods"): its
-/// `horizon-mixin.toml` and an `[api]` crate with one hook. It is what the launcher
-/// builds (`native-build <dir>`) and packs as `mixins/<id>/` of a `.hnmod`
-/// (docs/api/mod-files.md). `horizon` pins the Horizon commit it is made for.
-fn new_native(
-    dir: &Path,
-    id: &str,
-    horizon: Option<&str>,
-    fill: impl Fn(&str) -> String,
-) -> Result<(), String> {
-    // `[mod] id`, as `horizon-native.json` needs it: the template keeps to its characters.
-    if id.len() > 64 {
-        return Err(format!("mod id {id}: 64 characters at most"));
-    }
-    let (compatibility, rev) = match horizon {
-        Some(commit) if horizon_mods::index::native::revision(commit) => (
-            format!("[compatibility]\nhorizon_revision = \"{commit}\"\n"),
-            format!(", rev = \"{commit}\""),
-        ),
-        Some(commit) => {
-            return Err(format!(
-                "--horizon {commit}: a Horizon commit is 40 lowercase hex digits"
-            ));
-        }
-        // Unpinned, it builds on the instance's own Horizon.
-        None => (
-            "# The Horizon commit it is made for; unpinned, it builds on the instance's own.\n\
-             # [compatibility]\n# horizon_revision = \"<40 hex digits>\"\n"
-                .to_owned(),
-            String::new(),
-        ),
-    };
-    let files = [
-        (
-            "horizon-mixin.toml",
-            include_str!("../template/native/horizon-mixin.toml"),
-        ),
-        (
-            "api/Cargo.toml",
-            include_str!("../template/native/api.toml"),
-        ),
-        ("api/src/lib.rs", include_str!("../template/native/lib.rs")),
-        (".gitignore", include_str!("../template/gitignore")),
-    ];
-    for (file, text) in files {
-        let to = dir.join(file);
-        std::fs::create_dir_all(to.parent().expect("a file in the mod"))
-            .map_err(|e| e.to_string())?;
-        let text = fill(text)
-            .replace("{compatibility}", &compatibility)
-            .replace("{rev}", &rev);
-        std::fs::write(&to, text).map_err(|e| format!("{}: {e}", to.display()))?;
-    }
-    println!(
-        "Created {} (native mod id {id}). Next: horizon-launcher native-build {} --instance <instance> --trust-native-code",
-        dir.display(),
-        dir.display()
-    );
-    Ok(())
-}
-
 /// Packs the content mod in the current folder into `target/horizon-mod/<id>.hmod`: the
 /// manifest and the files in `assets/` and `data/`.
 fn build() -> Result<PathBuf, String> {
@@ -334,68 +272,4 @@ mod tests {
        );
        std::fs::remove_dir_all(&dir).unwrap();
    }
-
-    #[test]
-    fn the_native_template_packs_into_an_hnmod_the_registry_accepts() {
-        use std::io::Write;
-        let dir = std::env::temp_dir().join(format!("horizon-mod-native-{}", std::process::id()));
-        let path = dir.join("machine-mod");
-        let commit = "0123456789abcdef0123456789abcdef01234567";
-        let args = [
-            path.display().to_string(),
-            "--template".into(),
-            "native".into(),
-            "--horizon".into(),
-            commit.into(),
-        ];
-        new(&args).unwrap();
-        let api = std::fs::read_to_string(path.join("api/Cargo.toml")).unwrap();
-        assert!(api.contains(&format!("rev = \"{commit}\"")), "{api}");
-        // Packed as the launcher packs a mod folder: the manifest, then the bundle under
-        // `mixins/<id>/` (docs/api/mod-files.md).
-        let manifest = serde_json::json!({
-            "schema": 1, "id": "machine_mod", "version": "0.1.0", "game": "26.3",
-            "horizon": commit, "mixins": "b".repeat(40),
-        });
-        let hnmod = dir.join("machine_mod.hnmod");
-        let mut zip = zip::ZipWriter::new(std::fs::File::create(&hnmod).unwrap());
-        let options = zip::write::SimpleFileOptions::default();
-        zip.start_file("horizon-native.json", options).unwrap();
-        zip.write_all(manifest.to_string().as_bytes()).unwrap();
-        for file in [
-            "horizon-mixin.toml",
-            "api/Cargo.toml",
-            "api/src/lib.rs",
-            ".gitignore",
-        ] {
-            assert!(horizon_mods::index::native::allowed(file), "{file}");
-            zip.start_file(format!("mixins/machine_mod/{file}"), options)
-                .unwrap();
-            zip.write_all(&std::fs::read(path.join(file)).unwrap())
-                .unwrap();
-        }
-        zip.finish().unwrap();
-        let report = check::check(&hnmod, check::kind_of(&hnmod).unwrap(), None, None).unwrap();
-        assert!(report.text().contains("machine_mod"), "{}", report.text());
-        // A pin that is not a commit is refused; with none, the folder builds on the
-        // instance's Horizon.
-        let bad = [
-            dir.join("bad").display().to_string(),
-            "--template".into(),
-            "native".into(),
-            "--horizon".into(),
-            "main".into(),
-        ];
-        assert!(new(&bad).unwrap_err().contains("40 lowercase hex"));
-        let free = dir.join("free");
-        new(&[
-            free.display().to_string(),
-            "--template".into(),
-            "native".into(),
-        ])
-        .unwrap();
-        let mixin = std::fs::read_to_string(free.join("horizon-mixin.toml")).unwrap();
-        assert!(!mixin.contains("\nhorizon_revision"), "{mixin}");
-        std::fs::remove_dir_all(&dir).unwrap();
-    }
 }
@@ -6,5 +6,5 @@ authors = []
 # A content mod: blocks, items and mob effects from data/ and assets/, no code (API 0.2).
 api = "0.2"
 side = "both"
-# registries: "May add blocks, items, mob effects and entity types to your worlds".
+# registries: "May add blocks, items and mob effects to your worlds".
 capabilities = ["registries"]
@@ -1,9 +0,0 @@
-[package]
-name = "mod-{id}"
-version = "0.1.0"
-edition = "2024"
-
-[dependencies]
-# The launcher points this at the Horizon source it builds the game from. Any other
-# dependency must be a crate and version in Horizon's Cargo.lock.
-horizon-client = { git = "https://github.com/horizon-rust/horizon"{rev} }
@@ -1,9 +0,0 @@
-# {name}: a native trait mod (docs/native-mods.md, "Trait mods"). Build it with
-# `horizon-launcher native-build <this folder> --instance <instance> --trust-native-code`.
-[mod]
-id = "{id}"
-version = "0.1.0"
-
-{compatibility}
-[api]
-path = "api"
@@ -1,18 +0,0 @@
-//! The trait mod: the launcher links this crate into the game and calls `hooks()`. Each
-//! method of `Hooks` is one of Horizon's hook points; implement the ones the mod needs
-//! (docs/native-mods.md, "Trait mods").
-use horizon_client::mod_api::{Hooks, Host, PlayerLoggedInEvent, Text};
-
-pub fn hooks() -> Box<dyn Hooks> {
-    Box::new(Mod)
-}
-
-struct Mod;
-
-impl Hooks for Mod {
-    /// A player joined the server (NeoForge's `PlayerLoggedInEvent`): greet them.
-    fn player_logged_in(&self, host: &mut dyn Host, event: &mut PlayerLoggedInEvent<'_>) {
-        let line = format!("{id} says hello, {}!", event.name);
-        host.tell(event.player, Text::literal(line));
-    }
-}
@@ -8,16 +8,12 @@
 //! check, off. A check that fails *flags* the player: its violation level (VL) rises by the flag's
 //! weight and falls back by `decay` a second. From `setback` on, the move or action is cancelled (the
 //! player is sent back where the server last had them); from `alert` on, online operators and the
-//! console are told; from `kick` on, the player is disconnected. A check's kicks are counted per player
-//! across sessions ([`Strikes`]), and the kick that reaches its `ban_after` bans the player instead
-//! (`banned-players.json`, reason "Horizon anticheat: <check>"). Any threshold at 0 turns that action
-//! off.
+//! console are told; from `kick` on, the player is disconnected. Nothing bans. Any threshold at 0 turns
+//! that action off.
 //!
 //! The checks are written from vanilla 26.3's own rules and from what cheats are publicly described to
 //! do, never from another anticheat's code.

-use std::collections::BTreeMap;
-
 use serde::{Deserialize, Serialize};

 pub mod combat;
@@ -32,14 +28,12 @@ pub struct Actions {
    pub kick: f32,
    /// Violation level lost each second.
    pub decay: f32,
-    /// The kick, counting this check's earlier ones for the player, that bans instead; 0: never.
-    pub ban_after: u32,
 }

 macro_rules! checks {
    ($(
        $(#[$doc:meta])*
-        $field:ident: $Check:ident => $Config:ident [$setback:expr, $alert:expr, $kick:expr, $decay:expr, $ban_after:expr] {
+        $field:ident: $Check:ident => $Config:ident [$setback:expr, $alert:expr, $kick:expr, $decay:expr] {
            $( $(#[$xdoc:meta])* $extra:ident: $ty:ty = $default:expr, )*
        }
    )*) => {
@@ -65,7 +59,6 @@ macro_rules! checks {
                pub alert: f32,
                pub kick: f32,
                pub decay: f32,
-                pub ban_after: u32,
                $( $(#[$xdoc])* pub $extra: $ty, )*
            }

@@ -77,7 +70,6 @@ macro_rules! checks {
                        alert: $alert,
                        kick: $kick,
                        decay: $decay,
-                        ban_after: $ban_after,
                        $($extra: $default,)*
                    }
                }
@@ -95,9 +87,6 @@ macro_rules! checks {
            pub alert_level: u8,
            /// Every flag, one line each, relative to the server's folder; empty: no file.
            pub log: String,
-            /// The players' kicks by check ([`Strikes`]), relative to the server's folder; empty: kept
-            /// only while the server runs.
-            pub strikes: String,
            $(pub $field: $Config,)*
        }

@@ -108,7 +97,6 @@ macro_rules! checks {
                    alerts: true,
                    alert_level: 2,
                    log: "logs/anticheat.log".into(),
-                    strikes: "anticheat-strikes.json".into(),
                    $($field: $Config::default(),)*
                }
            }
@@ -124,13 +112,7 @@ macro_rules! checks {
                match check {
                    $(Check::$Check => {
                        let c = &self.$field;
-                        Actions {
-                            setback: c.setback,
-                            alert: c.alert,
-                            kick: c.kick,
-                            decay: c.decay,
-                            ban_after: c.ban_after,
-                        }
+                        Actions { setback: c.setback, alert: c.alert, kick: c.kick, decay: c.decay }
                    })*
                }
            }
@@ -143,7 +125,7 @@ checks! {
    /// every tick with ServerboundClientTickEndPacket, at the server's tick rate; each one spends a tick's
    /// time from a balance that wall-clock time fills, capped so a pause can't be saved up for a burst.
    /// It logs only by default; once trusted: `setback = 2`, `alert = 5`, `kick = 20`.
-    timer: Timer => TimerConfig [0.0, 0.0, 0.0, 0.02, 0] {
+    timer: Timer => TimerConfig [0.0, 0.0, 0.0, 0.02] {
        /// How far ahead of the clock, in milliseconds, a client may get before it is flagged.
        tolerance_ms: f64 = 300.0,
        /// The most time, in milliseconds, a quiet connection banks for the ticks that follow (a lag
@@ -153,12 +135,9 @@ checks! {

    /// Ground: a move that says it ends on the ground with nothing there to stand on: no-fall (claiming
    /// the ground to skip fall damage) and walking on water. The claim is dropped, so vanilla's
-    /// fall damage follows (the player is never sent back: `setback = 0` makes the check log only), and
-    /// a player that keeps claiming is kicked, then banned at the second kick (`ban_after = 2`). A claim standing still isn't
-    /// judged (no fall to skip). On the official server's first two hours (67 players), every player who
-    /// wasn't flying or walking on water peaked at level 7 (4 claims standing still in one second); the
-    /// ones who were, at 113 to 3749.
-    ground: Ground => GroundConfig [10.0, 15.0, 30.0, 2.0, 2] {}
+    /// fall damage follows; from `setback` on the player is also sent back. Logging only (`setback = 0`,
+    /// the default), the claim stands. Once trusted: `setback = 5`, `alert = 15`, `kick = 60`.
+    ground: Ground => GroundConfig [0.0, 0.0, 0.0, 2.0] {}

    /// Prediction: each move played again from the client's own inputs with vanilla's movement code,
    /// and compared (speed, step, fly, jesus...). Each player's client ticks are recorded
@@ -170,7 +149,7 @@ checks! {
    /// a chunk the client doesn't have, a riptide launch) is excused, and so are the ticks after it
    /// until the moves agree again. It logs only by default; once trusted: `setback = 5`, `alert = 15`,
    /// `kick = 60`.
-    prediction: Prediction => PredictionConfig [0.0, 0.0, 0.0, 2.0, 0] {
+    prediction: Prediction => PredictionConfig [0.0, 0.0, 0.0, 2.0] {
        /// How far, in blocks, a move may land from where the replay puts it.
        tolerance: f64 = 0.03,
    }
@@ -178,9 +157,8 @@ checks! {
    /// Combat: attacks vanilla's client can't send (`combat`): one with no swing after it (a kill aura
    /// that hides its swing), or a second entity attacked in the same client tick (vanilla attacks the
    /// one entity under the crosshair, picked once a tick). Each flags once; from `setback` on the
-    /// player's attacks are dropped. A vanilla client never trips it, so it acts by default: the first
-    /// kick warns, the second bans (`ban_after = 2`).
-    combat: Combat => CombatConfig [2.0, 5.0, 20.0, 0.5, 2] {}
+    /// player's attacks are dropped. A vanilla client never trips it, so it acts by default.
+    combat: Combat => CombatConfig [2.0, 5.0, 20.0, 0.5] {}
 }

 /// How many checks there are.
@@ -229,33 +207,6 @@ impl Config {
    }
 }

-/// How many times each check kicked each player, kept across sessions (`strikes`, a JSON object of
-/// players' UUIDs to check names to counts): the kick that reaches a check's `ban_after` is a ban.
-#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
-#[serde(transparent)]
-pub struct Strikes(pub BTreeMap<String, BTreeMap<String, u32>>);
-
-impl Strikes {
-    /// Player `uuid` was kicked by `check`: its kicks by it so far, this one included, and whether this
-    /// one bans. A ban starts the count again, so a player an operator pardons is kicked before the
-    /// next ban.
-    pub fn kick(&mut self, uuid: &str, check: Check, ban_after: u32) -> (u32, bool) {
-        let count = self
-            .0
-            .entry(uuid.to_owned())
-            .or_default()
-            .entry(check.name().to_owned())
-            .or_default();
-        *count = count.saturating_add(1);
-        let kicks = *count;
-        let ban = ban_after > 0 && kicks >= ban_after;
-        if ban {
-            *count = 0;
-        }
-        (kicks, ban)
-    }
-}
-
 /// What a flag leads to.
 #[derive(Clone, Copy, Debug, Default, PartialEq)]
 pub struct Verdict {
@@ -281,13 +232,6 @@ pub struct Player {
    pub ground: Option<(u64, f64)>,
    /// The client ticks the prediction plays again (only while it runs).
    pub record: Option<Box<prediction::Record>>,
-    /// Sprinting as the client's own commands left it (ServerboundPlayerCommandPacket's
-    /// START_SPRINTING and STOP_SPRINTING: LocalPlayer.wasSprinting), which the record's ticks take.
-    /// Not the server's player: a hit with extra knockback stops its sprint
-    /// (Player.causeExtraKnockback), the client's own `Player.attack` doesn't (a mob's `hurtClient`
-    /// is false), and once the server's flag reaches it LocalPlayer.aiStep starts the sprint again
-    /// while the sprint key is held, with nothing to say: wasSprinting never changed.
-    pub sprinting: bool,
    /// The attacks of the client tick being heard.
    pub attacks: combat::Attacks,
 }
@@ -333,19 +277,14 @@ mod tests {
    }

    #[test]
-    fn on_by_default_but_only_combat_and_ground_act() {
+    fn on_by_default_but_only_combat_acts() {
        let c = Config::from_server_toml("[server]\nport = 25565\n").unwrap();
        assert_eq!(c, Config::default());
        for &check in Check::ALL {
            assert!(c.runs(check), "{}", check.name());
            let a = c.actions(check);
            let acts = [a.setback, a.alert, a.kick] != [0.0; 3];
-            assert_eq!(
-                acts,
-                matches!(check, Check::Combat | Check::Ground),
-                "{}",
-                check.name()
-            );
+            assert_eq!(acts, check == Check::Combat, "{}", check.name());
        }
        let off = Config::from_server_toml("[anticheat]\nenabled = false\n").unwrap();
        assert!(Check::ALL.iter().all(|&check| !off.runs(check)));
@@ -397,25 +336,6 @@ mod tests {
        assert!(v.kick && v.alert);
    }

-    #[test]
-    fn the_kick_that_reaches_ban_after_bans() {
-        let c = Config::default();
-        assert_eq!(c.actions(Check::Combat).ban_after, 2);
-        assert_eq!(c.actions(Check::Prediction).ban_after, 0);
-        let mut s = Strikes::default();
-        assert_eq!(s.kick("a", Check::Combat, 2), (1, false));
-        // Another player, another check: their own counts.
-        assert_eq!(s.kick("b", Check::Combat, 2), (1, false));
-        assert_eq!(s.kick("a", Check::Timer, 2), (1, false));
-        assert_eq!(s.kick("a", Check::Combat, 2), (2, true));
-        // Pardoned, the player is kicked once more before the next ban.
-        assert_eq!(s.kick("a", Check::Combat, 2), (1, false));
-        // 0 never bans; 1 bans at the first kick.
-        assert_eq!(s.kick("c", Check::Timer, 0), (1, false));
-        assert_eq!(s.kick("c", Check::Timer, 0), (2, false));
-        assert_eq!(s.kick("d", Check::Ground, 1), (1, true));
-    }
-
    #[test]
    fn zero_turns_an_action_off() {
        let mut c = on();
@@ -33,21 +33,9 @@ pub enum Change {
    Velocity([f64; 3]),
    /// ClientboundExplodePacket's player knockback, added to the velocity.
    Knockback([f64; 3]),
-    /// ClientboundUpdateAttributesPacket for the player itself: the server's attributes as they
-    /// are when the replay reaches it, but for the movement speed's sprint modifier, which the
-    /// client's sprinting decides: `sprint` is whether the packet had it when it carried the
-    /// movement speed (the client takes the modifiers as sent, so a sprint modifier the packet
-    /// lacks is gone while the client sprints), None when it didn't (the client keeps its own).
-    Attributes { sprint: Option<bool> },
-    /// ClientboundSetEntityDataPacket for the player itself with its shared flags: their sprinting
-    /// bit, which the client takes as sent (SynchedEntityData.assignValues sets the flag alone, its
-    /// speed modifier and wasSprinting stay). A client whose sprint the server cleared this way
-    /// starts it again in its next aiStep, which adds the modifier back, and says nothing.
-    Sprinting(bool),
-    /// ClientboundUpdateMobEffectPacket or ClientboundRemoveMobEffectPacket for the player itself:
-    /// the server's effects, as they are when the replay reaches it. (Their attribute modifiers
-    /// are the server's: they reach the client as attributes.)
-    Effects,
+    /// ClientboundUpdateAttributesPacket or a mob effect for the player itself: the server's
+    /// attributes and effects, as they are when the replay reaches it.
+    State,
    /// ClientboundPlayerAbilitiesPacket (a game mode, flight given or taken), or the player's chest
    /// slot (a glider put on or taken off): the replay takes these from the server every tick, so a
    /// tick played before the client had them may be off.
@@ -398,16 +386,16 @@ mod tests {
    fn changes_keep_the_server_tick_that_sent_them() {
        let mut r = Record::default();
        r.changed(3, Change::Velocity([0.0, 0.4, 0.0]));
-        r.changed(5, Change::Effects);
+        r.changed(5, Change::State);
        let all: Vec<_> = r.changes_since(0).unwrap().copied().collect();
        assert_eq!(
            all,
-            [(3, Change::Velocity([0.0, 0.4, 0.0])), (5, Change::Effects)]
+            [(3, Change::Velocity([0.0, 0.4, 0.0])), (5, Change::State)]
        );
        assert_eq!(r.changes_since(1).unwrap().count(), 1);
        assert!(r.changes_since(3).is_none());
        for i in 0..CHANGES_KEPT as u64 {
-            r.changed(6 + i, Change::Effects);
+            r.changed(6 + i, Change::State);
        }
        // The first two are gone.
        assert!(r.changes_since(1).is_none());
@@ -8,7 +8,6 @@ description = "Horizon version-specific model and resource decoding"

 [dependencies]
 horizon-core = { path = "../horizon-core" }
-log = "0.4"
 serde = "1.0.229"
 serde_json = { version = "1.0.151", features = ["raw_value"] }

@@ -1,10 +1,5 @@
 //! Cuboid geometry in block units, including blockstate rotation and UV locking.
-use crate::{
-    json::*,
-    model::*,
-    obj::{MtlTexture, ObjFace, ObjModel},
-    resolve::{ResolvedCuboidModel, ResolvedLoader},
-};
+use crate::{json::*, model::*, resolve::ResolvedCuboidModel};
 mod transform;
 pub use transform::BlockModelTransform;

@@ -18,40 +13,7 @@ pub struct ModelQuad {
    pub material: Material,
    pub tint_index: i32,
    pub shade_direction_override: Option<Direction>,
-    /// The face's or element's `light_emission`.
    pub light_emission: u8,
-    /// Least (block, sky) light the quad is drawn with: its emission, raised by `neoforge_data`.
-    pub light: [u8; 2],
-    /// `neoforge_data` colour (ARGB) multiplied into the quad's tint.
-    pub color: Option<i32>,
-    /// `neoforge_data` override of the model's ambient occlusion for this quad.
-    pub ambient_occlusion: Option<bool>,
-    pub render_type: Option<RenderType>,
-    /// False for a loader quad that takes no directional shading.
-    pub shade: bool,
-}
-
-/// NeoForge's `render_type` names.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum RenderType {
-    Solid,
-    Cutout,
-    CutoutMipped,
-    Translucent,
-    Tripwire,
-}
-impl RenderType {
-    /// Accepts a bare or `minecraft:` name; others (mods' own types) are `None`.
-    pub fn by_name(name: &str) -> Option<Self> {
-        match name.strip_prefix("minecraft:").unwrap_or(name) {
-            "solid" => Some(Self::Solid),
-            "cutout" => Some(Self::Cutout),
-            "cutout_mipped" => Some(Self::CutoutMipped),
-            "translucent" => Some(Self::Translucent),
-            "tripwire" => Some(Self::Tripwire),
-            _ => None,
-        }
-    }
 }

 #[derive(Clone, Copy, Debug)]
@@ -224,17 +186,6 @@ fn bake_elements(
    skip_flat: bool,
 ) -> Result<Vec<ModelQuad>> {
    let mut output = Vec::new();
-    bake_into(model, transform, skip_flat, &mut output)?;
-    Ok(output)
-}
-/// The elements, then what the model's loader adds.
-fn bake_into(
-    model: &ResolvedCuboidModel,
-    transform: BlockModelTransform,
-    skip_flat: bool,
-    output: &mut Vec<ModelQuad>,
-) -> Result<()> {
-    let render_type = model.render_type.as_deref().and_then(RenderType::by_name);
    for element in model.elements() {
        let element = element
            .as_ref()
@@ -256,108 +207,11 @@ fn bake_into(
                force_translucent: false,
            });
            output.push(bake_face(
-                element,
-                face,
-                *direction,
-                matrix,
-                material,
-                transform,
-                render_type,
+                element, face, *direction, matrix, material, transform,
            )?);
        }
    }
-    match model.loader() {
-        Some(ResolvedLoader::Composite(children)) => {
-            for child in children {
-                bake_into(child, transform, skip_flat, output)?;
-            }
-        }
-        Some(ResolvedLoader::Obj {
-            model: Some(obj),
-            flip_v,
-            shade,
-            hidden,
-        }) => bake_obj(model, obj, *flip_v, *shade, hidden, transform, output)?,
-        Some(ResolvedLoader::Obj { model: None, .. }) | None => {}
-    }
-    Ok(())
-}
-/// Obj faces are unculled quads in block units; the blockstate transform moves them whole.
-fn bake_obj(
-    model: &ResolvedCuboidModel,
-    obj: &ObjModel,
-    flip_v: bool,
-    shade: bool,
-    hidden: &std::collections::BTreeSet<String>,
-    transform: BlockModelTransform,
-    output: &mut Vec<ModelQuad>,
-) -> Result<()> {
-    let render_type = model.render_type.as_deref().and_then(RenderType::by_name);
-    for face in obj.faces.iter().filter(|f| !hidden.contains(&f.object)) {
-        let slot = match obj.materials.get(&face.material) {
-            Some(MtlTexture::Sprite(sprite)) => {
-                output.push(obj_quad(
-                    face,
-                    Material {
-                        sprite: identifier(sprite)?,
-                        force_translucent: false,
-                    },
-                    flip_v,
-                    shade,
-                    render_type,
-                    transform,
-                ));
-                continue;
-            }
-            Some(MtlTexture::Slot(slot)) => slot,
-            None => &face.material,
-        };
-        let material = if slot.is_empty() {
-            None
-        } else {
-            model.material(slot)?
-        };
-        let material = material.cloned().unwrap_or(Material {
-            sprite: "minecraft:missingno".to_owned(),
-            force_translucent: false,
-        });
-        output.push(obj_quad(
-            face,
-            material,
-            flip_v,
-            shade,
-            render_type,
-            transform,
-        ));
-    }
-    Ok(())
-}
-fn obj_quad(
-    face: &ObjFace,
-    material: Material,
-    flip_v: bool,
-    shade: bool,
-    render_type: Option<RenderType>,
-    transform: BlockModelTransform,
-) -> ModelQuad {
-    let positions = face.vertices.map(|v| transform.position(v.position));
-    ModelQuad {
-        positions,
-        uv: face
-            .vertices
-            .map(|v| [v.uv[0], if flip_v { 1.0 - v.uv[1] } else { v.uv[1] }]),
-        facing: facing(&positions).unwrap_or(Direction::Up),
-        cull: None,
-        material,
-        tint_index: -1,
-        shade_direction_override: None,
-        light_emission: 0,
-        light: [0; 2],
-        color: None,
-        ambient_occlusion: None,
-        render_type,
-        shade,
-    }
+    Ok(output)
 }
 /// `FaceBakery.bakeQuad` for a quad with explicit corners and unit-atlas UVs
 /// (`uv` in 0..16 texels), as `ItemModelGenerator` builds its layers.
@@ -376,7 +230,6 @@ pub fn bake_flat_face(
        rotation: None,
        shade_direction_override: None,
        light_emission: 0,
-        neoforge_data: None,
    };
    let face = Face {
        cull: None,
@@ -384,8 +237,6 @@ pub fn bake_flat_face(
        texture: String::new(),
        uv: Some(uv),
        rotation: 0,
-        light_emission: None,
-        neoforge_data: None,
    };
    bake_face(
        &element,
@@ -394,7 +245,6 @@ pub fn bake_flat_face(
        None,
        material,
        BlockModelTransform::new([0; 3], false),
-        None,
    )
 }
 fn bake_face(
@@ -404,7 +254,6 @@ fn bake_face(
    matrix: Option<ElementMatrix>,
    material: Material,
    transform: BlockModelTransform,
-    render_type: Option<RenderType>,
 ) -> Result<ModelQuad> {
    let mut positions = corners(element.from, element.to, direction).map(|v| v.map(|c| c / 16.0));
    if let (Some(rotation), Some(matrix)) = (&element.rotation, matrix) {
@@ -454,11 +303,6 @@ fn bake_face(
            uv.swap(index, found);
        }
    }
-    let data = face
-        .neoforge_data
-        .unwrap_or_default()
-        .over(element.neoforge_data.unwrap_or_default());
-    let light_emission = face.light_emission.unwrap_or(element.light_emission);
    Ok(ModelQuad {
        positions,
        uv,
@@ -467,196 +311,6 @@ fn bake_face(
        material,
        tint_index: face.tint_index,
        shade_direction_override: element.shade_direction_override,
-        light_emission,
-        light: [data.block_light, data.sky_light].map(|l| l.unwrap_or(0).max(light_emission)),
-        color: data.color,
-        ambient_occlusion: data.ambient_occlusion,
-        render_type,
-        shade: true,
+        light_emission: element.light_emission,
    })
 }
-
-#[cfg(test)]
-mod loader_tests {
-    use super::*;
-    use crate::resolve::{AssetReader, ModelLibrary};
-    use std::{collections::BTreeMap, sync::Arc};
-
-    struct Files(BTreeMap<&'static str, &'static str>);
-    impl AssetReader for Files {
-        fn read_text(&self, location: &str) -> Option<String> {
-            self.0.get(location).map(|text| (*text).to_owned())
-        }
-    }
-
-    fn library(models: &[(&str, &str)], files: &[(&'static str, &'static str)]) -> ModelLibrary {
-        let models = models
-            .iter()
-            .map(|(name, json)| ((*name).to_owned(), CuboidModel::from_json(json).unwrap()))
-            .collect();
-        ModelLibrary::new(models)
-            .unwrap()
-            .with_assets(Arc::new(Files(files.iter().copied().collect())))
-    }
-    fn bake(library: &ModelLibrary, name: &str) -> Vec<ModelQuad> {
-        bake_block_model(
-            &library.resolve(name).unwrap(),
-            BlockModelTransform::new([0; 3], false),
-        )
-        .unwrap()
-    }
-    fn sprites(quads: &[ModelQuad]) -> Vec<&str> {
-        quads.iter().map(|q| q.material.sprite.as_str()).collect()
-    }
-    const CUBE: &str =
-        r##"{"elements":[{"from":[0,0,0],"to":[16,16,16],"faces":{"up":{"texture":"#all"}}}]}"##;
-    const COMPOSITE: &str = r#"{"loader":"neoforge:composite","textures":{"all":"block/shared"},
-        "children":{"zeta":{"parent":"t:cube","textures":{"all":"block/own"}},"alpha":{"parent":"t:cube"}}}"#;
-
-    #[test]
-    fn composite_bakes_children_in_document_order_with_slot_fallback() {
-        let library = library(&[("t:cube", CUBE), ("t:comp", COMPOSITE)], &[]);
-        let quads = bake(&library, "t:comp");
-        assert_eq!(
-            sprites(&quads),
-            ["minecraft:block/own", "minecraft:block/shared"]
-        );
-    }
-    #[test]
-    fn composite_visibility_hides_a_child() {
-        let hidden =
-            COMPOSITE.replace(r#""children""#, r#""visibility":{"zeta":false},"children""#);
-        let library = library(&[("t:cube", CUBE), ("t:comp", &hidden)], &[]);
-        assert_eq!(
-            sprites(&bake(&library, "t:comp")),
-            ["minecraft:block/shared"]
-        );
-    }
-    #[test]
-    fn an_inheriting_model_overrides_which_children_are_visible() {
-        let hidden =
-            COMPOSITE.replace(r#""children""#, r#""visibility":{"zeta":false},"children""#);
-        let shown = r#"{"parent":"t:hidden","visibility":{"zeta":true,"alpha":false}}"#;
-        let library = library(
-            &[("t:cube", CUBE), ("t:hidden", &hidden), ("t:shown", shown)],
-            &[],
-        );
-        assert_eq!(sprites(&bake(&library, "t:shown")), ["minecraft:block/own"]);
-    }
-    #[test]
-    fn loader_is_inherited_by_parent_after_own_elements() {
-        let derived = r##"{"parent":"t:comp","textures":{"all":"block/derived"},
-            "elements":[{"from":[0,0,0],"to":[16,16,16],"faces":{"down":{"texture":"#all"}}}]}"##;
-        let library = library(
-            &[
-                ("t:cube", CUBE),
-                ("t:comp", COMPOSITE),
-                ("t:derived", derived),
-            ],
-            &[],
-        );
-        let quads = bake(&library, "t:derived");
-        assert_eq!(quads[0].facing, Direction::Down);
-        assert_eq!(
-            sprites(&quads),
-            [
-                "minecraft:block/derived",
-                "minecraft:block/own",
-                "minecraft:block/derived"
-            ]
-        );
-    }
-    #[test]
-    fn own_loader_wins_and_unknown_loader_adds_nothing() {
-        let other = r#"{"parent":"t:comp","loader":"somemod:thing"}"#;
-        let library = library(
-            &[("t:cube", CUBE), ("t:comp", COMPOSITE), ("t:other", other)],
-            &[],
-        );
-        assert!(bake(&library, "t:other").is_empty());
-    }
-    #[test]
-    fn composites_that_nest_through_themselves_are_an_error() {
-        let looping = r#"{"loader":"neoforge:composite","children":{"a":{"parent":"t:loop"}}}"#;
-        let library = library(&[("t:loop", looping)], &[]);
-        assert!(library.resolve("t:loop").is_err());
-    }
-
-    const OBJ: &str = "mtllib m.mtl\nv 0 0 0\nv 1 0 0\nv 1 0 1\nv 0 0 1\nv 0 1 0\n\
-        vt 0 0\nvt 1 0\nvt 1 1\nvt 0 1\n\
-        usemtl top\nf 1/1 4/4 3/3 2/2\nusemtl side\nf 1/1 2/2 5/4\nusemtl bare\nf 1/1 2/2 5/4\n";
-    const MTL: &str = "newmtl top\nmap_Kd #lid\nnewmtl side\nmap_Kd #wall\nnewmtl bare\nKd 1 1 1\n";
-    const OBJ_FILES: [(&str, &str); 2] = [("t:models/x.obj", OBJ), ("t:models/m.mtl", MTL)];
-    const OBJ_MODEL: &str = r#"{"loader":"neoforge:obj","model":"t:models/x.obj","flip_v":true,
-        "textures":{"lid":"block/lid","wall":"block/wall"}}"#;
-
-    #[test]
-    fn obj_faces_become_quads_with_materials_and_flipped_v() {
-        let flat = OBJ_MODEL.replace(r#""flip_v":true,"#, "");
-        let library = library(&[("t:o", OBJ_MODEL), ("t:flat", &flat)], &OBJ_FILES);
-        let quads = bake(&library, "t:o");
-        assert_eq!(
-            sprites(&quads),
-            [
-                "minecraft:block/lid",
-                "minecraft:block/wall",
-                "minecraft:missingno"
-            ]
-        );
-        assert_eq!(quads[0].facing, Direction::Up);
-        assert_eq!(quads[1].facing, Direction::South);
-        assert_eq!(quads[0].positions[1], [0.0, 0.0, 1.0]);
-        assert_eq!(quads[0].uv[0], [0.0, 1.0]);
-        assert_eq!(quads[0].uv[2], [1.0, 0.0]);
-        // A triangle repeats its last vertex.
-        assert_eq!(quads[1].positions[3], quads[1].positions[2]);
-        assert_eq!(quads[1].uv[3], quads[1].uv[2]);
-        assert!(quads.iter().all(|q| q.cull.is_none() && q.shade));
-        assert_eq!(bake(&library, "t:flat")[0].uv[0], [0.0, 0.0]);
-    }
-    #[test]
-    fn obj_shade_quads_false_and_mtl_override() {
-        let unshaded = r#"{"loader":"neoforge:obj","model":"t:models/x.obj","shade_quads":false,
-            "mtl_override":"t:models/o.mtl","textures":{"s":"block/s"}}"#;
-        let files = [
-            ("t:models/x.obj", OBJ),
-            ("t:models/o.mtl", "newmtl top\nmap_Kd #s\n"),
-        ];
-        let library = library(&[("t:u", unshaded)], &files);
-        let quads = bake(&library, "t:u");
-        assert!(quads.iter().all(|q| !q.shade));
-        assert_eq!(quads[0].material.sprite, "minecraft:block/s");
-    }
-    #[test]
-    fn missing_or_broken_obj_bakes_nothing() {
-        let missing = library(&[("t:o", OBJ_MODEL)], &[]);
-        assert!(bake(&missing, "t:o").is_empty());
-        let broken = library(
-            &[("t:o", OBJ_MODEL)],
-            &[("t:models/x.obj", "v 0 0 0\nf 1 2 3\n")],
-        );
-        assert!(bake(&broken, "t:o").is_empty());
-    }
-    #[test]
-    fn obj_visibility_skips_the_objects_a_model_hides() {
-        let two = "v 0 0 0\nv 1 0 0\nv 1 0 1\nv 0 0 1\no a\nusemtl m\nf 1 2 3 4\no b\nf 4 3 2 1\n";
-        let files = [("t:models/two.obj", two)];
-        let base =
-            r#"{"loader":"neoforge:obj","model":"t:models/two.obj","textures":{"m":"block/m"}}"#;
-        let hiding = r#"{"parent":"t:base","visibility":{"b":false}}"#;
-        let restoring = r#"{"parent":"t:hiding","visibility":{"b":true}}"#;
-        let library = library(
-            &[
-                ("t:base", base),
-                ("t:hiding", hiding),
-                ("t:restoring", restoring),
-            ],
-            &files,
-        );
-        assert_eq!(bake(&library, "t:base").len(), 2);
-        let quads = bake(&library, "t:hiding");
-        assert_eq!(quads.len(), 1);
-        assert_eq!(quads[0].facing, Direction::Down);
-        assert_eq!(bake(&library, "t:restoring").len(), 2);
-    }
-}
@@ -7,7 +7,7 @@ use crate::{
    json::Result,
    math::{Mat4, quaternion_xyz},
    model::{Direction, DisplayTransform, GuiLight, ItemTransform, Material},
-    resolve::{ModelLibrary, ResolvedCuboidModel},
+    resolve::ModelLibrary,
 };
 use std::{collections::BTreeSet, f32::consts::PI};

@@ -110,15 +110,6 @@ pub fn bake_item_model(
    let model = library
        .resolve(name)
        .or_else(|_| library.resolve(crate::resolve::MISSING_MODEL))?;
-    bake_resolved(&model, sprites)
-}
-
-/// Bake an already resolved model, e.g. one from
-/// [`ModelLibrary::resolve_with_textures`].
-pub fn bake_resolved(
-    model: &ResolvedCuboidModel,
-    sprites: &dyn SpriteLookup,
-) -> Result<BakedItemModel> {
    let known = |sprite: &str| sprite == MISSING_SPRITE || sprites.mask(sprite).is_some();
    let material = |m: &Material| {
        if known(&m.sprite) {
@@ -152,7 +143,7 @@ pub fn bake_resolved(
        quads
    } else {
        let mut quads =
-            bake_block_model(model, crate::bake::BlockModelTransform::new([0; 3], false))?;
+            bake_block_model(&model, crate::bake::BlockModelTransform::new([0; 3], false))?;
        for q in &mut quads {
            q.material = material(&q.material);
        }
@@ -307,87 +298,3 @@ fn extrude_layer(mask: &SpriteMask, material: &Material, layer: i32) -> Result<V
    }
    Ok(quads)
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::model::{CuboidModel, TextureSlot};
-    use std::collections::BTreeMap;
-
-    /// The stick: 2x2 with one transparent pixel. `item/cit`: one opaque pixel, so a bake
-    /// shows whose mask it extruded.
-    struct Sprites;
-    impl SpriteLookup for Sprites {
-        fn mask(&self, sprite: &str) -> Option<SpriteMask> {
-            match sprite {
-                "minecraft:item/stick" => Some(SpriteMask {
-                    width: 2,
-                    height: 2,
-                    frames: vec![vec![true, false, false, false]],
-                }),
-                "horizon_cit:item/cit" => Some(SpriteMask {
-                    width: 1,
-                    height: 1,
-                    frames: vec![vec![false]],
-                }),
-                _ => None,
-            }
-        }
-    }
-    fn library() -> ModelLibrary {
-        ModelLibrary::with_item_generator(BTreeMap::from(
-            [
-                ("item/generated", r#"{"parent":"builtin/generated","display":{"gui":{"scale":[2,2,2]}}}"#),
-                ("item/stick", r#"{"parent":"item/generated","textures":{"layer0":"item/stick"}}"#),
-                ("horizon:loop", r#"{"parent":"horizon:loop2"}"#),
-                ("horizon:loop2", r#"{"parent":"horizon:loop"}"#),
-                ("block/slab", r##"{"textures":{"particle":"#side","side":"block/absent"},"elements":[{"from":[0,0,0],"to":[16,8,16],"faces":{"up":{"texture":"#side"},"down":{"texture":"#side","cullface":"down"}}}]}"##),
-            ]
-            .map(|(name, json)| (name.to_owned(), CuboidModel::from_json(json).unwrap())),
-        ))
-        .unwrap()
-    }
-    #[test]
-    fn baking_by_name_falls_back_to_the_missing_model() {
-        let library = library();
-        // Front, back, and the 8 unit edges around the L of 3 opaque pixels.
-        let stick = bake_item_model(&library, &Sprites, "item/stick").unwrap();
-        assert_eq!(stick.quads.len(), 10);
-        // An unknown sprite bakes as the missing sprite.
-        let slab = bake_item_model(&library, &Sprites, "block/slab").unwrap();
-        assert_eq!(slab.quads.len(), 2);
-        assert_eq!(slab.particle.sprite, MISSING_SPRITE);
-        // A cyclic chain, an error to `resolve`, bakes as the missing cube.
-        let cyclic = bake_item_model(&library, &Sprites, "horizon:loop").unwrap();
-        assert_eq!(cyclic.quads.len(), 6);
-        assert!(
-            cyclic
-                .quads
-                .iter()
-                .all(|q| q.material.sprite == MISSING_SPRITE)
-        );
-    }
-    #[test]
-    fn replaced_layer_bakes_with_its_own_sprite() {
-        let library = library();
-        let child = BTreeMap::from([(
-            "layer0".to_owned(),
-            TextureSlot::Material(Material {
-                sprite: "horizon_cit:item/cit".to_owned(),
-                force_translucent: false,
-            }),
-        )]);
-        let model = library.resolve_with_textures("item/stick", &child).unwrap();
-        let baked = bake_resolved(&model, &Sprites).unwrap();
-        // The CIT sprite's own mask, one opaque pixel: front, back and 4 edges.
-        assert_eq!(baked.quads.len(), 6);
-        assert!(
-            baked
-                .quads
-                .iter()
-                .all(|q| q.material.sprite == "horizon_cit:item/cit")
-        );
-        assert_eq!(baked.particle.sprite, "horizon_cit:item/cit");
-        assert_eq!(baked.transforms[5].as_ref().unwrap().scale, [2.0; 3]);
-    }
-}
@@ -17,7 +17,6 @@ use std::{
 };

 mod component_predicate;
-mod foreign;
 mod special;
 pub use special::{SpecialKind, SpecialModel};

@@ -432,17 +431,6 @@ impl ItemModelNode {
    pub fn decode(v: &Value) -> Result<Self> {
        let m = object(v)?;
        let kind = ident(required(m, "type")?)?;
-        if kind == "minecraft:condition" {
-            let property = ident(required(m, "property")?)?;
-            if !property.starts_with("minecraft:") {
-                return Ok(Self::Condition {
-                    transformation: optional_transformation(m)?,
-                    property: ConditionProperty::Custom(property),
-                    on_true: Box::new(Self::decode(required(m, "on_true")?)?),
-                    on_false: Box::new(Self::decode(required(m, "on_false")?)?),
-                });
-            }
-        }
        Ok(match kind.as_str() {
            "minecraft:empty" => Self::Empty,
            "minecraft:model" => Self::Model(ModelLeaf {
@@ -463,21 +451,12 @@ impl ItemModelNode {
                    .collect::<Result<_>>()?,
                transformation: optional_transformation(m)?,
            },
-            "minecraft:condition" if foreign::property_is_foreign(m)? => foreign::wrap(
-                Self::decode(required(m, "on_false")?)?,
-                optional_transformation(m)?,
-            ),
            "minecraft:condition" => Self::Condition {
                transformation: optional_transformation(m)?,
                property: ConditionProperty::decode(m)?,
                on_true: Box::new(Self::decode(required(m, "on_true")?)?),
                on_false: Box::new(Self::decode(required(m, "on_false")?)?),
            },
-            "minecraft:select" if foreign::property_is_foreign(m)? => {
-                // No case can match a property Horizon cannot read.
-                let fallback = get(m, "fallback").map(Self::decode).transpose()?;
-                foreign::wrap(fallback.unwrap_or(Self::Empty), optional_transformation(m)?)
-            }
            "minecraft:select" => {
                let transformation = optional_transformation(m)?;
                let property = SelectProperty::decode(m)?;
@@ -505,7 +484,6 @@ impl ItemModelNode {
                }
            }
            "minecraft:range_dispatch" => {
-                let foreign_property = foreign::property_is_foreign(m)?;
                let mut entries = list(required(m, "entries")?)?
                    .iter()
                    .map(|e| {
@@ -518,17 +496,6 @@ impl ItemModelNode {
                    .collect::<Result<Vec<_>>>()?;
                // `Comparator.comparingDouble`: Double.compare, a total order.
                entries.sort_by(|a, b| f64::from(a.0).total_cmp(&f64::from(b.0)));
-                if foreign_property {
-                    // A property Horizon cannot read is 0.
-                    let fallback = get(m, "fallback").map(Self::decode).transpose()?;
-                    let chosen = last_index_less_or_equal(&entries, 0.0)
-                        .map(|i| entries.swap_remove(i).1)
-                        .or(fallback);
-                    return Ok(foreign::wrap(
-                        chosen.unwrap_or(Self::Empty),
-                        optional_transformation(m)?,
-                    ));
-                }
                Self::RangeDispatch {
                    transformation: optional_transformation(m)?,
                    property: NumericProperty::decode(m)?,
@@ -539,21 +506,12 @@ impl ItemModelNode {
                        .transpose()?,
                }
            }
-            "minecraft:special" if SpecialModel::is_foreign(required(m, "model")?) => {
-                // The mod's own renderer is not run: the base model stands in.
-                Self::Model(ModelLeaf {
-                    model: ident(required(m, "base")?)?,
-                    transformation: optional_transformation(m)?,
-                    tints: Vec::new(),
-                })
-            }
            "minecraft:special" => Self::Special {
                base: ident(required(m, "base")?)?,
                transformation: optional_transformation(m)?,
                model: SpecialModel::decode(required(m, "model")?)?,
            },
            "minecraft:bundle/selected_item" => Self::BundleSelectedItem,
-            other if foreign::is_foreign(other) => foreign::decode_node(other, m),
            _ => return Err(err("unknown item model type")),
        })
    }
@@ -645,8 +603,6 @@ impl TintSource {
            "minecraft:firework" => Self::Firework(default()?),
            "minecraft:potion" => Self::Potion(default()?),
            "minecraft:team" => Self::Team(default()?),
-            // A mod's own tint source, which its Java code computes: untinted here.
-            other if foreign::is_foreign(other) => Self::Constant(-1),
            _ => return Err(err("unknown item tint source")),
        })
    }
@@ -658,7 +614,6 @@ impl TintSource {

 #[derive(Clone, Debug, PartialEq)]
 pub enum ConditionProperty {
-    Custom(String),
    CustomModelData(i32),
    UsingItem,
    Broken,
@@ -991,10 +946,6 @@ pub struct Context<'a> {

 /// Host services the resolver cannot derive from data alone.
 pub trait ItemEnv {
-    /// A mod's namespaced conditional property, false when no mod supplies it.
-    fn item_model_property(&self, _property: &str, _stack: &StackView) -> bool {
-        false
-    }
    /// `PotionContents.getColorOr` for the potion/effects part: the mixed
    /// effect colour, or `None` when the contents have no visible effects.
    fn potion_effect_color(&self, _potion_contents: &Value) -> Option<i32> {
@@ -1348,9 +1299,6 @@ impl Resolve<'_> {
    fn condition(&self, property: &ConditionProperty) -> bool {
        let owner = self.ctx.owner;
        match property {
-            ConditionProperty::Custom(property) => {
-                self.env.item_model_property(property, self.stack)
-            }
            ConditionProperty::CustomModelData(i) => {
                self.component("minecraft:custom_model_data")
                    .and_then(|d| custom_data_at(d, "flags", *i))
@@ -1769,7 +1717,5 @@ fn binary_search(a: &[f32], key: f32) -> std::result::Result<usize, usize> {
    Err(low as usize)
 }

-#[cfg(test)]
-mod foreign_tests;
 #[cfg(test)]
 mod tests;
@@ -1,114 +0,0 @@
-//! Nodes and properties of other namespaces (a mod's, NeoForge's) decode to the closest vanilla behaviour.
-use super::{
-    ItemModelNode, ModelLeaf, Result, TintSource, get, ident, identifier, list, object,
-    optional_transformation,
-};
-use crate::{json::error as err, math::Mat4};
-use serde_json::{Map, Value};
-
-/// Keys a mod's node usually keeps its real model under, in order of preference.
-const MODEL_KEYS: [&str; 4] = ["model", "base_model", "base", "fallback"];
-
-pub fn is_foreign(id: &str) -> bool {
-    !id.starts_with("minecraft:")
-}
-
-/// A composite carries the transformation a collapsed node had.
-pub fn wrap(node: ItemModelNode, transformation: Option<Mat4>) -> ItemModelNode {
-    match transformation {
-        None => node,
-        Some(_) => ItemModelNode::Composite {
-            models: vec![node],
-            transformation,
-        },
-    }
-}
-
-pub fn property_is_foreign(m: &Map<String, Value>) -> Result<bool> {
-    let property = m
-        .get("property")
-        .ok_or_else(|| err("missing property"))
-        .and_then(ident)?;
-    Ok(is_foreign(&property))
-}
-
-fn leaf(model: String, m: &Map<String, Value>) -> ItemModelNode {
-    let tints = get(m, "tints")
-        .and_then(|t| list(t).ok())
-        .map(|t| {
-            t.iter()
-                .filter_map(|t| TintSource::decode(t).ok())
-                .collect()
-        })
-        .unwrap_or_default();
-    ItemModelNode::Model(ModelLeaf {
-        model,
-        transformation: optional_transformation(m).ok().flatten(),
-        tints,
-    })
-}
-
-/// A node of an unknown non-vanilla type: its nested node, else its model id, else nothing.
-pub fn decode_node(kind: &str, m: &Map<String, Value>) -> ItemModelNode {
-    if kind == "neoforge:fluid_container" {
-        return fluid_container(m);
-    }
-    for key in MODEL_KEYS {
-        match m.get(key) {
-            Some(nested @ Value::Object(_)) => {
-                if let Ok(node) = ItemModelNode::decode(nested) {
-                    return wrap(node, optional_transformation(m).ok().flatten());
-                }
-            }
-            Some(Value::String(id)) => {
-                if let Ok(id) = identifier(id) {
-                    return leaf(id, m);
-                }
-            }
-            _ => {}
-        }
-    }
-    let by_suffix = m
-        .iter()
-        .filter(|(k, _)| k.ends_with("_model"))
-        .find_map(|(_, v)| v.as_str().and_then(|id| identifier(id).ok()));
-    match by_suffix {
-        Some(id) => leaf(id, m),
-        None => ItemModelNode::Empty,
-    }
-}
-
-// The fluid is not drawn: only the base (and an unmasked cover) texture, taken as a model id (a bucket's).
-fn fluid_container(m: &Map<String, Value>) -> ItemModelNode {
-    let textures = m.get("textures").and_then(|t| object(t).ok());
-    let texture = |key: &str| {
-        textures
-            .and_then(|t| t.get(key))
-            .and_then(Value::as_str)
-            .and_then(|id| identifier(id).ok())
-    };
-    let mut layers = vec![texture("base")];
-    if m.get("cover_is_mask") == Some(&Value::Bool(false)) {
-        layers.push(texture("cover"));
-    }
-    let mut models: Vec<ItemModelNode> = layers
-        .into_iter()
-        .flatten()
-        .map(|model| {
-            ItemModelNode::Model(ModelLeaf {
-                model,
-                transformation: None,
-                tints: Vec::new(),
-            })
-        })
-        .collect();
-    let transformation = optional_transformation(m).ok().flatten();
-    match models.len() {
-        0 => ItemModelNode::Empty,
-        1 => wrap(models.remove(0), transformation),
-        _ => ItemModelNode::Composite {
-            models,
-            transformation,
-        },
-    }
-}
@@ -1,185 +0,0 @@
-use super::*;
-
-fn node(json: &str) -> Result<ItemModelNode> {
-    ItemModelNode::decode(&serde_json::from_str(json).unwrap())
-}
-fn model_id(n: &ItemModelNode) -> &str {
-    match n {
-        ItemModelNode::Model(leaf) => &leaf.model,
-        other => panic!("not a model: {other:?}"),
-    }
-}
-
-#[test]
-fn node_with_a_model_id_draws_that_model() {
-    let n = node(r#"{"type":"mod:thing","model":"mod:item/thing","tints":[{"type":"mod:tint"}]}"#)
-        .unwrap();
-    assert_eq!(model_id(&n), "mod:item/thing");
-    let ItemModelNode::Model(leaf) = n else {
-        unreachable!()
-    };
-    assert_eq!(leaf.tints, vec![TintSource::Constant(-1)]);
-    let n = node(r#"{"type":"mod:thing","base_model":"mod:item/base"}"#).unwrap();
-    assert_eq!(model_id(&n), "mod:item/base");
-    let n = node(r#"{"type":"mod:thing","on_model":"mod:item/a"}"#).unwrap();
-    assert_eq!(model_id(&n), "mod:item/a");
-}
-
-#[test]
-fn node_with_a_nested_node_decodes_it() {
-    let n = node(
-        r#"{"type":"neoforge:trimmed_armor","base_model":{"type":"minecraft:model","model":"mod:item/boots"}}"#,
-    )
-    .unwrap();
-    assert_eq!(model_id(&n), "mod:item/boots");
-    let n = node(
-        r#"{"type":"mod:x","model":{"type":"mod:y","model":"mod:item/inner"},"transformation":[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1]}"#,
-    )
-    .unwrap();
-    let ItemModelNode::Composite {
-        models,
-        transformation,
-    } = n
-    else {
-        panic!("a transformation wraps the nested node")
-    };
-    assert!(transformation.is_some());
-    assert_eq!(model_id(&models[0]), "mod:item/inner");
-}
-
-#[test]
-fn node_with_nothing_usable_is_empty() {
-    assert!(matches!(
-        node(r#"{"type":"mod:facade"}"#).unwrap(),
-        ItemModelNode::Empty
-    ));
-    assert!(matches!(
-        node(r#"{"type":"mod:x","model":7}"#).unwrap(),
-        ItemModelNode::Empty
-    ));
-    assert!(ClientItem::from_json(r#"{"model":{"type":"ae2:facade"}}"#).is_ok());
-}
-
-#[test]
-fn unknown_vanilla_names_still_fail() {
-    assert!(node(r#"{"type":"minecraft:nope"}"#).is_err());
-    assert!(node(r#"{"type":"nope","model":"a:b"}"#).is_err());
-    let leaf = r#"{"type":"minecraft:model","model":"a:b"}"#;
-    for json in [
-        format!(
-            r#"{{"type":"minecraft:condition","property":"minecraft:nope","on_true":{leaf},"on_false":{leaf}}}"#
-        ),
-        format!(
-            r#"{{"type":"minecraft:select","property":"minecraft:nope","cases":[],"fallback":{leaf}}}"#
-        ),
-        format!(
-            r#"{{"type":"minecraft:range_dispatch","property":"minecraft:nope","entries":[],"fallback":{leaf}}}"#
-        ),
-    ] {
-        assert!(node(&json).is_err(), "{json}");
-    }
-    assert!(
-        node(r#"{"type":"minecraft:special","base":"a:b","model":{"type":"minecraft:nope"}}"#)
-            .is_err()
-    );
-    assert!(ClientItem::from_json(r#"{"model":{"type":"minecraft:nope"}}"#).is_err());
-}
-
-#[test]
-fn condition_property_is_false() {
-    let n = node(
-        r#"{"type":"minecraft:condition","property":"mod:flag",
-            "on_true":{"type":"minecraft:model","model":"a:yes"},
-            "on_false":{"type":"minecraft:model","model":"a:no"}}"#,
-    )
-    .unwrap();
-    // A mod's property stays a condition its mod answers per stack
-    // (`item_model_property`); with no mod answering it, `on_false` is drawn.
-    let ItemModelNode::Condition {
-        property: ConditionProperty::Custom(property),
-        on_false,
-        ..
-    } = &n
-    else {
-        panic!("not a custom condition: {n:?}")
-    };
-    assert_eq!(property, "mod:flag");
-    assert_eq!(model_id(on_false), "a:no");
-}
-
-#[test]
-fn select_property_takes_the_fallback_or_nothing() {
-    let n = node(
-        r#"{"type":"minecraft:select","property":"mod:level",
-            "cases":[{"when":"low","model":{"type":"minecraft:model","model":"a:low"}}],
-            "fallback":{"type":"minecraft:model","model":"a:other"}}"#,
-    )
-    .unwrap();
-    assert_eq!(model_id(&n), "a:other");
-    let n = node(r#"{"type":"minecraft:select","property":"mod:level","cases":[]}"#).unwrap();
-    assert!(matches!(n, ItemModelNode::Empty));
-}
-
-#[test]
-fn range_property_reads_zero() {
-    let entry = |t: f32, m: &str| {
-        format!(r#"{{"threshold":{t},"model":{{"type":"minecraft:model","model":"{m}"}}}}"#)
-    };
-    let fallback = r#","fallback":{"type":"minecraft:model","model":"a:fb"}"#;
-    let make = |entries: &[String], fallback: &str| {
-        node(&format!(
-            r#"{{"type":"minecraft:range_dispatch","property":"mod:fill","entries":[{}]{fallback}}}"#,
-            entries.join(",")
-        ))
-        .unwrap()
-    };
-    let n = make(&[entry(0.2, "a:one"), entry(0.4, "a:two")], fallback);
-    assert_eq!(model_id(&n), "a:fb");
-    let n = make(
-        &[
-            entry(0.0, "a:zero"),
-            entry(-1.0, "a:neg"),
-            entry(0.5, "a:half"),
-        ],
-        fallback,
-    );
-    assert_eq!(model_id(&n), "a:zero");
-    let n = make(&[entry(0.2, "a:one")], "");
-    assert!(matches!(n, ItemModelNode::Empty));
-}
-
-#[test]
-fn special_type_keeps_its_base_model() {
-    let n = node(
-        r#"{"type":"minecraft:special","base":"mod:item/cube","model":{"type":"mod:energy_cube"}}"#,
-    )
-    .unwrap();
-    assert_eq!(model_id(&n), "mod:item/cube");
-    let n =
-        node(r#"{"type":"minecraft:special","base":"a:b","model":{"type":"minecraft:shield"}}"#)
-            .unwrap();
-    assert!(matches!(n, ItemModelNode::Special { .. }));
-}
-
-#[test]
-fn fluid_container_draws_its_base_without_the_fluid() {
-    let n = node(
-        r#"{"type":"neoforge:fluid_container","fluid":"mod:gas","cover_is_mask":false,"flip_gas":true,
-            "textures":{"base":"minecraft:item/bucket","fluid":"neoforge:item/mask/bucket_fluid"}}"#,
-    )
-    .unwrap();
-    assert_eq!(model_id(&n), "minecraft:item/bucket");
-    let n = node(
-        r#"{"type":"neoforge:fluid_container","cover_is_mask":false,
-            "textures":{"base":"a:item/flask","cover":"a:item/flask_cover"}}"#,
-    )
-    .unwrap();
-    let ItemModelNode::Composite { models, .. } = n else {
-        panic!("base and cover")
-    };
-    assert_eq!(models.len(), 2);
-    assert!(matches!(
-        node(r#"{"type":"neoforge:fluid_container"}"#).unwrap(),
-        ItemModelNode::Empty
-    ));
-}
@@ -77,13 +77,6 @@ fn one_of(v: &Value, names: &[&str]) -> Result<String> {
 }

 impl SpecialModel {
-    /// A special model type of another namespace, which Horizon has no renderer for.
-    pub fn is_foreign(v: &Value) -> bool {
-        v.get("type")
-            .and_then(Value::as_str)
-            .and_then(|t| super::identifier(t).ok())
-            .is_some_and(|t| super::foreign::is_foreign(&t))
-    }
    pub fn decode(v: &Value) -> Result<Self> {
        let m = object(v)?;
        let float_or = |key: &str, default: f32| get(m, key).map_or(Ok(default), float);
@@ -18,96 +18,3 @@ fn display_context_names_round_trip() {
        assert_eq!(DisplayContext::by_name(name).unwrap().name(), name);
    }
 }
-
-#[test]
-fn a_mods_tint_source_is_untinted_and_an_unknown_vanilla_one_fails() {
-    let tint = |json: &str| TintSource::decode(&serde_json::from_str(json).unwrap());
-    assert_eq!(
-        tint(r#"{"type":"ae2:storage_cell_state"}"#).unwrap(),
-        TintSource::Constant(-1)
-    );
-    assert!(tint(r#"{"type":"minecraft:nonsense"}"#).is_err());
-}
-
-#[test]
-fn custom_condition_is_evaluated_per_stack_at_branch_selection() {
-    struct Env;
-    impl ItemEnv for Env {
-        fn item_model_property(&self, property: &str, stack: &StackView) -> bool {
-            assert_eq!(property, "example:charged");
-            stack.count > 1 && stack.patch.get("example:charged") == Some(&Some(Value::Bool(true)))
-        }
-    }
-    let definition = ClientItem::from_json(
-        r#"{"model":{
-        "type":"minecraft:condition", "property":"example:charged",
-        "on_true":{"type":"minecraft:model","model":"example:item/charged"},
-        "on_false":{"type":"minecraft:model","model":"example:item/idle"}
-    }}"#,
-    )
-    .unwrap();
-    let mut models = ItemModels::default();
-    models.definitions.insert("example:tool".into(), definition);
-    models.prototypes.insert(
-        "example:tool".into(),
-        BTreeMap::from([(
-            "minecraft:item_model".into(),
-            Value::String("example:tool".into()),
-        )]),
-    );
-    let context = Context {
-        display: DisplayContext::Gui,
-        owner: None,
-        level: None,
-        seed: 0,
-    };
-    let mut stack = StackView::new("example:tool", 1);
-    let chosen = |stack: &StackView, env: &dyn ItemEnv| {
-        let resolved = models.resolve(stack, &context, env);
-        assert_eq!(resolved.layers.len(), 1);
-        let LayerContent::Model { model } = &resolved.layers[0].content else {
-            panic!("expected model leaf")
-        };
-        model.clone()
-    };
-    assert_eq!(chosen(&stack, &NoEnv), "example:item/idle");
-    assert_eq!(chosen(&stack, &Env), "example:item/idle");
-    stack
-        .patch
-        .insert("example:charged".into(), Some(Value::Bool(true)));
-    assert_eq!(chosen(&stack, &Env), "example:item/idle");
-    stack.count = 2;
-    assert_eq!(chosen(&stack, &Env), "example:item/charged");
-    assert_eq!(chosen(&stack, &NoEnv), "example:item/idle");
-    stack.patch.insert("example:charged".into(), None);
-    assert_eq!(chosen(&stack, &Env), "example:item/idle");
-}
-
-#[test]
-fn custom_condition_validates_its_name_and_both_branches() {
-    let node = |property: &str, on_true: Value| {
-        ItemModelNode::decode(&serde_json::json!({
-            "type": "minecraft:condition", "property": property,
-            "on_true": on_true, "on_false": {"type": "minecraft:empty"}
-        }))
-    };
-    let empty = serde_json::json!({"type": "minecraft:empty"});
-    for name in [
-        "minecraft:unknown",
-        "unknown",
-        "example:Bad",
-        "bad name:charged",
-    ] {
-        assert!(node(name, empty.clone()).is_err(), "{name}");
-    }
-    assert!(node("example:charged", Value::Null).is_err());
-    assert!(matches!(
-        node("minecraft:damaged", empty.clone()).unwrap(),
-        ItemModelNode::Condition {
-            property: ConditionProperty::Damaged,
-            ..
-        }
-    ));
-    assert!(matches!(node("example:charged", empty).unwrap(),
-        ItemModelNode::Condition { property: ConditionProperty::Custom(name), .. } if name == "example:charged"));
-}
@@ -87,39 +87,6 @@ pub(crate) fn object(raw: &RawValue) -> Result<Object<'_>> {
    }
    Ok(serde_json::from_str(raw.get())?)
 }
-/// The members of an object in document order, which `object` loses.
-pub(crate) fn ordered_object(raw: &RawValue) -> Result<Vec<(String, &RawValue)>> {
-    struct Members<'a>(Vec<(String, &'a RawValue)>);
-    impl<'de> serde::Deserialize<'de> for Members<'de> {
-        fn deserialize<D: serde::Deserializer<'de>>(
-            deserializer: D,
-        ) -> std::result::Result<Self, D::Error> {
-            struct Visitor;
-            impl<'de> serde::de::Visitor<'de> for Visitor {
-                type Value = Members<'de>;
-                fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
-                    f.write_str("an object")
-                }
-                fn visit_map<A: serde::de::MapAccess<'de>>(
-                    self,
-                    mut map: A,
-                ) -> std::result::Result<Self::Value, A::Error> {
-                    let mut members: Vec<(String, &'de RawValue)> = Vec::new();
-                    while let Some(entry) = map.next_entry::<String, &'de RawValue>()? {
-                        members.retain(|(name, _)| *name != entry.0);
-                        members.push(entry);
-                    }
-                    Ok(Members(members))
-                }
-            }
-            deserializer.deserialize_map(Visitor)
-        }
-    }
-    if !raw.get().starts_with('{') {
-        return Err(error("expected object"));
-    }
-    Ok(serde_json::from_str::<Members>(raw.get())?.0)
-}
 pub(crate) fn array(raw: &RawValue) -> Result<Vec<&RawValue>> {
    Ok(serde_json::from_str(raw.get())?)
 }
@@ -9,7 +9,6 @@ pub mod item_model;
 mod json;
 pub mod math;
 pub mod model;
-pub mod obj;
 pub mod palette;
 pub mod resolve;

@@ -5,7 +5,7 @@
 //! does; render preparation must diagnose these before baking.
 use crate::json::*;
 use serde_json::value::RawValue;
-use std::{collections::BTreeMap, sync::Arc};
+use std::collections::BTreeMap;

 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub enum Direction {
@@ -59,92 +59,11 @@ pub enum TextureSlot {
 #[derive(Clone, Debug, PartialEq)]
 pub struct CuboidModel {
    pub parent: Option<String>,
-    pub loader: Option<Loader>,
    pub ambient_occlusion: Option<bool>,
    pub gui_light: Option<GuiLight>,
    pub textures: BTreeMap<String, TextureSlot>,
    pub elements: Option<Vec<Option<Element>>>,
    pub display: Option<ItemTransforms>,
-    /// NeoForge's `render_type`, without a `minecraft:` prefix.
-    pub render_type: Option<String>,
-    /// A model's `visibility`: an obj object or composite child name to shown; absent is shown.
-    pub visibility: BTreeMap<String, bool>,
-}
-/// A custom model loader's payload; a model inherits its parent's loader unless it names its own.
-#[derive(Clone, Debug, PartialEq)]
-pub enum Loader {
-    /// `neoforge:composite`: children in document order.
-    Composite {
-        children: Vec<(String, Arc<CuboidModel>)>,
-        /// Child name to shown; a child absent from the map is shown.
-        visibility: BTreeMap<String, bool>,
-    },
-    /// `neoforge:obj`: `model` and `mtl_override` are asset locations.
-    Obj {
-        model: String,
-        flip_v: bool,
-        shade_quads: Option<bool>,
-        mtl_override: Option<String>,
-    },
-    /// A loader this decoder does not know: it adds no geometry.
-    Unknown(String),
-}
-/// NeoForge's `neoforge_data` of an element or a face; a face's keys win.
-#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
-pub struct NeoforgeData {
-    pub block_light: Option<u8>,
-    pub sky_light: Option<u8>,
-    /// ARGB.
-    pub color: Option<i32>,
-    pub ambient_occlusion: Option<bool>,
-}
-impl NeoforgeData {
-    /// `self` over `base`, key by key.
-    pub fn over(self, base: Self) -> Self {
-        Self {
-            block_light: self.block_light.or(base.block_light),
-            sky_light: self.sky_light.or(base.sky_light),
-            color: self.color.or(base.color),
-            ambient_occlusion: self.ambient_occlusion.or(base.ambient_occlusion),
-        }
-    }
-    fn decode(raw: &RawValue) -> Result<Self> {
-        let obj = object(raw)?;
-        let light = |key: &str| -> Result<Option<u8>> {
-            Ok(obj
-                .get(key)
-                .map(|r| integer(r))
-                .transpose()?
-                .map(|v| v.clamp(0, 15) as u8))
-        };
-        // Some mods spell both lights as one `light_emission`.
-        let emission = light("light_emission")?;
-        let color = match obj.get("color") {
-            Some(raw) if raw.get().starts_with('"') => {
-                let text = string(raw)?;
-                let text = text.trim();
-                let hex = text
-                    .strip_prefix('#')
-                    .or_else(|| text.strip_prefix("0x"))
-                    .or_else(|| text.strip_prefix("0X"));
-                match hex {
-                    Some(hex) => u32::from_str_radix(hex, 16).ok().map(|v| v as i32),
-                    None => text.parse::<u32>().ok().map(|v| v as i32),
-                }
-            }
-            Some(raw) => Some(integer(raw)?),
-            None => None,
-        };
-        Ok(Self {
-            block_light: light("block_light")?.or(emission),
-            sky_light: light("sky_light")?.or(emission),
-            color,
-            ambient_occlusion: obj
-                .get("ambient_occlusion")
-                .map(|r| boolean(r))
-                .transpose()?,
-        })
-    }
 }
 #[derive(Clone, Debug, PartialEq)]
 pub struct Element {
@@ -154,7 +73,6 @@ pub struct Element {
    pub rotation: Option<ElementRotation>,
    pub shade_direction_override: Option<Direction>,
    pub light_emission: u8,
-    pub neoforge_data: Option<NeoforgeData>,
 }
 #[derive(Clone, Debug, PartialEq)]
 pub struct Face {
@@ -164,9 +82,6 @@ pub struct Face {
    pub uv: Option<[f32; 4]>,
    /// Normalized counterclockwise quadrants, in the range 0..4.
    pub rotation: u8,
-    /// A face-level `light_emission`, which wins over its element's.
-    pub light_emission: Option<u8>,
-    pub neoforge_data: Option<NeoforgeData>,
 }
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum Axis {
@@ -239,11 +154,6 @@ impl CuboidModel {
        } else {
            Some(identifier(&parent)?)
        };
-        let loader = obj
-            .get("loader")
-            .filter(|raw| raw.get() != "null")
-            .map(|raw| Loader::decode(raw, &obj))
-            .transpose()?;
        let ambient_occlusion = obj
            .get("ambientocclusion")
            .map(|r| boolean(r))
@@ -275,83 +185,15 @@ impl CuboidModel {
            .get("display")
            .map(|r| ItemTransforms::decode(r))
            .transpose()?;
-        let render_type = obj
-            .get("render_type")
-            .filter(|raw| raw.get().starts_with('"'))
-            .map(|raw| string(raw))
-            .transpose()?
-            .map(|name| name.strip_prefix("minecraft:").unwrap_or(&name).to_owned());
        Ok(Self {
            parent,
-            loader,
            ambient_occlusion,
            gui_light,
            textures,
            elements,
            display,
-            render_type,
-            visibility: visibility(&obj)?,
        })
    }
-    /// The models this one needs besides itself: its parent and its composite children's parents.
-    pub fn referenced_models(&self) -> Vec<String> {
-        let mut names: Vec<String> = self.parent.iter().cloned().collect();
-        if let Some(Loader::Composite { children, .. }) = &self.loader {
-            for (_, child) in children {
-                names.extend(child.referenced_models());
-            }
-        }
-        names
-    }
-}
-fn visibility(obj: &Object<'_>) -> Result<BTreeMap<String, bool>> {
-    let mut visibility = BTreeMap::new();
-    if let Some(raw) = obj.get("visibility") {
-        for (key, raw) in object(raw)? {
-            visibility.insert(key, boolean(raw)?);
-        }
-    }
-    Ok(visibility)
-}
-impl Loader {
-    fn decode(raw: &RawValue, obj: &Object<'_>) -> Result<Self> {
-        let name = primitive_string(raw)?;
-        match name.as_str() {
-            "neoforge:composite" => {
-                let mut children = Vec::new();
-                if let Some(raw) = obj.get("children") {
-                    for (name, raw) in ordered_object(raw)? {
-                        children.push((name, Arc::new(CuboidModel::decode(raw)?)));
-                    }
-                }
-                Ok(Self::Composite {
-                    children,
-                    visibility: visibility(obj)?,
-                })
-            }
-            "neoforge:obj" => {
-                let optional = |key: &str| {
-                    obj.get(key)
-                        .filter(|raw| raw.get() != "null")
-                        .map(|raw| primitive_string(raw))
-                        .transpose()
-                };
-                Ok(Self::Obj {
-                    model: identifier(&optional("model")?.ok_or_else(|| error("missing model"))?)?,
-                    flip_v: obj
-                        .get("flip_v")
-                        .map(|r| boolean(r))
-                        .transpose()?
-                        .unwrap_or(false),
-                    shade_quads: obj.get("shade_quads").map(|r| boolean(r)).transpose()?,
-                    mtl_override: optional("mtl_override")?
-                        .map(|name| identifier(&name))
-                        .transpose()?,
-                })
-            }
-            _ => Ok(Self::Unknown(name)),
-        }
-    }
 }
 fn nullable<T>(raw: &RawValue, decode: impl FnOnce(&RawValue) -> Result<T>) -> Result<Option<T>> {
    if raw.get() == "null" {
@@ -431,10 +273,6 @@ impl Element {
            rotation,
            shade_direction_override,
            light_emission: light_emission as u8,
-            neoforge_data: obj
-                .get("neoforge_data")
-                .map(|r| NeoforgeData::decode(r))
-                .transpose()?,
        })
    }
 }
@@ -468,15 +306,6 @@ impl Face {
            texture,
            uv,
            rotation: (rotation / 90) as u8,
-            light_emission: obj
-                .get("light_emission")
-                .map(|r| integer(r))
-                .transpose()?
-                .map(|v| v.clamp(0, 15) as u8),
-            neoforge_data: obj
-                .get("neoforge_data")
-                .map(|r| NeoforgeData::decode(r))
-                .transpose()?,
        })
    }
 }
@@ -1,183 +0,0 @@
-//! Wavefront OBJ and MTL text, as obj-loader models use them.
-use std::collections::BTreeMap;
-
-#[derive(Clone, Copy, Debug, PartialEq)]
-pub struct ObjVertex {
-    /// Block units.
-    pub position: [f32; 3],
-    /// Texture coordinates as written, 0..1 across the sprite.
-    pub uv: [f32; 2],
-}
-/// One quad; a triangle repeats its last vertex.
-#[derive(Clone, Debug, PartialEq)]
-pub struct ObjFace {
-    /// Empty before any `usemtl`.
-    pub material: String,
-    /// The `o` (else `g`) it belongs to, which a model's `visibility` names.
-    pub object: String,
-    pub vertices: [ObjVertex; 4],
-}
-#[derive(Clone, Debug, Default, PartialEq)]
-pub struct ParsedObj {
-    pub mtllib: Option<String>,
-    pub faces: Vec<ObjFace>,
-}
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub enum MtlTexture {
-    /// `map_Kd #name`: a texture slot of the model.
-    Slot(String),
-    /// `map_Kd namespace:path`: a sprite.
-    Sprite(String),
-}
-/// A parsed OBJ with its materials.
-#[derive(Clone, Debug, Default, PartialEq)]
-pub struct ObjModel {
-    pub faces: Vec<ObjFace>,
-    pub materials: BTreeMap<String, MtlTexture>,
-}
-
-pub fn parse_obj(text: &str) -> Result<ParsedObj, String> {
-    let mut positions: Vec<[f32; 3]> = Vec::new();
-    let mut uvs: Vec<[f32; 2]> = Vec::new();
-    let mut parsed = ParsedObj::default();
-    let mut material = String::new();
-    let mut object = String::new();
-    for (number, line) in text.lines().enumerate() {
-        let mut words = line.split_whitespace();
-        let Some(keyword) = words.next() else {
-            continue;
-        };
-        let at = |message: &str| format!("line {}: {message}", number + 1);
-        match keyword {
-            _ if keyword.starts_with('#') => {}
-            "v" => positions.push(floats::<3>(words).ok_or_else(|| at("bad vertex"))?),
-            "vt" => {
-                let mut words = words;
-                let u = words.next().and_then(|w| w.parse().ok());
-                let v = words.next().map_or(Some(0.0), |w| w.parse().ok());
-                let (Some(u), Some(v)) = (u, v) else {
-                    return Err(at("bad texture coordinate"));
-                };
-                uvs.push([u, v]);
-            }
-            "mtllib" => parsed.mtllib = words.next().map(str::to_owned),
-            "usemtl" => material = words.next().unwrap_or("").to_owned(),
-            "o" | "g" => object = words.next().unwrap_or("").to_owned(),
-            "f" => {
-                let mut corners = Vec::new();
-                for word in words {
-                    let mut parts = word.split('/');
-                    let position = index(parts.next(), positions.len())
-                        .ok_or_else(|| at("bad vertex index"))?;
-                    let uv = match parts.next() {
-                        None | Some("") => [0.0; 2],
-                        some => {
-                            uvs[index(some, uvs.len()).ok_or_else(|| at("bad texture index"))?]
-                        }
-                    };
-                    corners.push(ObjVertex {
-                        position: positions[position],
-                        uv,
-                    });
-                }
-                if corners.len() < 3 {
-                    return Err(at("face needs three vertices"));
-                }
-                let mut push = |vertices: [ObjVertex; 4]| {
-                    parsed.faces.push(ObjFace {
-                        material: material.clone(),
-                        object: object.clone(),
-                        vertices,
-                    });
-                };
-                if corners.len() <= 4 {
-                    let last = corners[corners.len() - 1];
-                    push(std::array::from_fn(|i| {
-                        corners.get(i).copied().unwrap_or(last)
-                    }));
-                } else {
-                    for i in 1..corners.len() - 1 {
-                        push([corners[0], corners[i], corners[i + 1], corners[i + 1]]);
-                    }
-                }
-            }
-            _ => {}
-        }
-    }
-    Ok(parsed)
-}
-fn floats<'a, const N: usize>(mut words: impl Iterator<Item = &'a str>) -> Option<[f32; N]> {
-    let mut result = [0.0; N];
-    for value in &mut result {
-        *value = words.next()?.parse().ok()?;
-    }
-    Some(result)
-}
-/// A 1-based index, or a negative one counted from the end.
-fn index(word: Option<&str>, len: usize) -> Option<usize> {
-    let value: i64 = word?.parse().ok()?;
-    let index = if value < 0 {
-        len as i64 + value
-    } else {
-        value - 1
-    };
-    (0..len as i64).contains(&index).then_some(index as usize)
-}
-
-/// Material name to its `map_Kd`; other statements are ignored.
-pub fn parse_mtl(text: &str) -> BTreeMap<String, MtlTexture> {
-    let mut materials = BTreeMap::new();
-    let mut current = None;
-    for line in text.lines() {
-        let mut words = line.split_whitespace();
-        match words.next() {
-            Some("newmtl") => current = words.next().map(str::to_owned),
-            Some("map_Kd") => {
-                let (Some(name), Some(value)) = (&current, words.last()) else {
-                    continue;
-                };
-                let texture = match value.strip_prefix('#') {
-                    Some(slot) => MtlTexture::Slot(slot.to_owned()),
-                    None => MtlTexture::Sprite(value.to_owned()),
-                };
-                materials.insert(name.clone(), texture);
-            }
-            _ => {}
-        }
-    }
-    materials
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn quads_triangles_and_negative_indices() {
-        let text = "mtllib a.mtl\nv 0 0 0\nv 1 0 0\nv 1 1 0\nv 0 1 0\nvt 0 0\nvt 1 0\nvt 1 1\nvt 0 1\n\
-                    usemtl first\nf 1/1/1 2/2/1 3/3/1 4/4/1\nusemtl second\nf -4//1 -3//1 -2//1\n";
-        let parsed = parse_obj(text).unwrap();
-        assert_eq!(parsed.mtllib.as_deref(), Some("a.mtl"));
-        assert_eq!(parsed.faces.len(), 2);
-        assert_eq!(parsed.faces[0].material, "first");
-        assert_eq!(parsed.faces[0].vertices[2].uv, [1.0, 1.0]);
-        let triangle = &parsed.faces[1];
-        assert_eq!(triangle.material, "second");
-        assert_eq!(triangle.vertices[0].position, [0.0, 0.0, 0.0]);
-        assert_eq!(triangle.vertices[3], triangle.vertices[2]);
-        assert_eq!(triangle.vertices[2].position, [1.0, 1.0, 0.0]);
-    }
-    #[test]
-    fn bad_indices_are_errors() {
-        assert!(parse_obj("v 0 0 0\nf 1 2 3\n").is_err());
-        assert!(parse_obj("v 0 0 0\nv 1 0 0\nf 1 2\n").is_err());
-    }
-    #[test]
-    fn mtl_maps_slots_and_sprites() {
-        let materials =
-            parse_mtl("newmtl a\nKd 1 1 1\nmap_Kd #top\nnewmtl b\nmap_Kd mod:block/x\nnewmtl c\n");
-        assert_eq!(materials["a"], MtlTexture::Slot("top".into()));
-        assert_eq!(materials["b"], MtlTexture::Sprite("mod:block/x".into()));
-        assert!(!materials.contains_key("c"));
-    }
-}
@@ -1,45 +1,18 @@
 //! Cuboid parent inheritance and texture-slot resolution.
-use crate::{
-    json::*,
-    model::*,
-    obj::{ObjModel, parse_mtl, parse_obj},
-};
+use crate::{json::*, model::*};
 use std::{
    collections::{BTreeMap, BTreeSet},
-    sync::{Arc, Mutex},
+    sync::Arc,
 };

 pub const MISSING_MODEL: &str = "minecraft:builtin/missing";
 /// `ItemModelGenerator.GENERATED_ITEM_MODEL_ID`.
 pub const GENERATED_MODEL: &str = "minecraft:builtin/generated";
-/// Composite children nest through parents that may name the composite again.
-const MAX_LOADER_DEPTH: u8 = 8;

-/// Reads asset files that models point at (`namespace:path` is `assets/namespace/path`).
-pub trait AssetReader: Send + Sync {
-    fn read_text(&self, location: &str) -> Option<String>;
-}
 /// Decoded models are immutable and their inherited geometry is shared.
 pub struct ModelLibrary {
    models: BTreeMap<String, Arc<CuboidModel>>,
    missing: Arc<CuboidModel>,
-    assets: Option<Arc<dyn AssetReader>>,
-    /// Keyed by obj and mtl override; `None` is a file that failed, already warned about.
-    objs: Mutex<BTreeMap<(String, Option<String>), Option<Arc<ObjModel>>>>,
-}
-/// What a model's loader adds to its own elements.
-#[derive(Clone, Debug)]
-pub enum ResolvedLoader {
-    /// The shown children, resolved on their own, in order.
-    Composite(Vec<ResolvedCuboidModel>),
-    Obj {
-        /// `None` when the file failed to load.
-        model: Option<Arc<ObjModel>>,
-        flip_v: bool,
-        shade: bool,
-        /// Objects the model chain's `visibility` hides.
-        hidden: BTreeSet<String>,
-    },
 }
 #[derive(Clone, Debug)]
 pub struct ResolvedCuboidModel {
@@ -49,17 +22,10 @@ pub struct ResolvedCuboidModel {
    pub textures: BTreeMap<String, Material>,
    /// Cyclic and dangling aliases are absent from `textures`.
    pub unresolved_textures: BTreeSet<String>,
-    /// NeoForge's `render_type`; the leaf-most model that sets one wins.
-    pub render_type: Option<String>,
    geometry: Option<Arc<CuboidModel>>,
    generated: bool,
-    loader: Option<ResolvedLoader>,
 }
 impl ResolvedCuboidModel {
-    /// Geometry from a custom loader, baked after the elements.
-    pub fn loader(&self) -> Option<&ResolvedLoader> {
-        self.loader.as_ref()
-    }
    /// Whether the top geometry is `builtin/generated`'s layer extrusion
    /// (no model closer to the leaf has elements of its own).
    pub fn uses_item_generator(&self) -> bool {
@@ -100,7 +66,6 @@ impl ModelLibrary {
    fn item_generator_model() -> CuboidModel {
        CuboidModel {
            parent: None,
-            loader: None,
            ambient_occlusion: None,
            gui_light: Some(GuiLight::Front),
            textures: BTreeMap::from([(
@@ -109,8 +74,6 @@ impl ModelLibrary {
            )]),
            elements: None,
            display: None,
-            render_type: None,
-            visibility: BTreeMap::new(),
        }
    }
    pub fn new(models: BTreeMap<String, CuboidModel>) -> Result<Self> {
@@ -137,112 +100,27 @@ impl ModelLibrary {
        Ok(Self {
            models: decoded,
            missing,
-            assets: None,
-            objs: Mutex::default(),
-        })
-    }
-    /// Where `neoforge:obj` models find their files.
-    pub fn with_assets(mut self, assets: Arc<dyn AssetReader>) -> Self {
-        self.assets = Some(assets);
-        self
-    }
-    /// This library plus `extra` models; an `extra` model replaces a
-    /// same-named one, but not the built-in missing and generated models.
-    /// Every existing model is shared, not copied.
-    pub fn overlaid(&self, extra: BTreeMap<String, CuboidModel>) -> Result<Self> {
-        let mut models = self.models.clone();
-        let mut added = BTreeSet::new();
-        for (name, model) in extra {
-            let name = identifier(&name)?;
-            if !added.insert(name.clone()) {
-                return Err(error("duplicate normalized model identifier"));
-            }
-            // The built-ins win, as `from_models` keeps `missing` and
-            // `with_item_generator` keeps `generated`.
-            if name != MISSING_MODEL && name != GENERATED_MODEL {
-                models.insert(name, Arc::new(model));
-            }
-        }
-        Ok(Self {
-            models,
-            missing: Arc::clone(&self.missing),
-            assets: self.assets.clone(),
-            objs: Mutex::default(),
        })
    }
    /// Follow the complete parent chain. A missing resource uses the built-in
    /// model; a cyclic chain is rejected, as native discovery excludes it.
    /// The returned model can outlive this library without copying its elements.
    pub fn resolve(&self, name: &str) -> Result<ResolvedCuboidModel> {
-        self.resolve_name(name, None)
-    }
-    /// Whether `name` and every parent it reaches are models of this library,
-    /// with no cycle: `resolve` puts the missing model in for any other.
-    pub fn resolves(&self, name: &str) -> bool {
-        let Ok(mut name) = identifier(name) else {
-            return false;
-        };
+        let mut name = identifier(name)?;
        let mut visited = BTreeSet::new();
+        let mut chain = Vec::new();
+        let mut names = Vec::new();
        loop {
-            let Some(model) = self.models.get(&name) else {
-                return false;
-            };
-            if !visited.insert(name.clone()) {
-                return false;
-            }
-            match &model.parent {
-                Some(parent) => name = parent.clone(),
-                None => return true,
-            }
-        }
-    }
-    /// `name`'s resolved model with a virtual child in front of it that has
-    /// only `textures`: the child's slots win, and `#references` anywhere in
-    /// the chain re-bind through them (so `builtin/generated`'s
-    /// `particle: #layer0` follows a replaced `layer0`). The child's slots are
-    /// taken as given: sprites namespaced, references without their `#`, as
-    /// the JSON decoder leaves them. A cyclic chain is an
-    /// error, as for `resolve`: a caller wanting the missing model falls
-    /// back to it.
-    pub fn resolve_with_textures(
-        &self,
-        name: &str,
-        child: &BTreeMap<String, TextureSlot>,
-    ) -> Result<ResolvedCuboidModel> {
-        self.resolve_name(name, Some(child))
-    }
-    fn resolve_name(
-        &self,
-        name: &str,
-        child: Option<&BTreeMap<String, TextureSlot>>,
-    ) -> Result<ResolvedCuboidModel> {
-        let next = Some(identifier(name)?);
-        self.resolve_chain(Vec::new(), Vec::new(), next, &BTreeMap::new(), child, 0)
-    }
-    /// `chain` and `names` start with models that are not in the library (a
-    /// composite child); `next` is the parent to follow. `fallback` slots lose
-    /// to any slot the chain defines.
-    fn resolve_chain(
-        &self,
-        mut chain: Vec<Arc<CuboidModel>>,
-        mut names: Vec<String>,
-        mut next: Option<String>,
-        fallback: &BTreeMap<String, TextureSlot>,
-        child: Option<&BTreeMap<String, TextureSlot>>,
-        depth: u8,
-    ) -> Result<ResolvedCuboidModel> {
-        if depth > MAX_LOADER_DEPTH {
-            return Err(error("composite models nest too deeply"));
-        }
-        let mut visited = BTreeSet::new();
-        while let Some(name) = next.take() {
            if !visited.insert(name.clone()) {
                return Err(error("cyclic model parent"));
            }
            let model = self.models.get(&name).unwrap_or(&self.missing);
-            chain.push(Arc::clone(model));
-            names.push(name);
-            next = model.parent.clone();
+            chain.push(model);
+            names.push(name.clone());
+            match &model.parent {
+                Some(parent) => name = parent.clone(),
+                None => break,
+            }
        }
        let ambient_occlusion = chain
            .iter()
@@ -252,8 +130,10 @@ impl ModelLibrary {
            .iter()
            .find_map(|m| m.gui_light)
            .unwrap_or(GuiLight::Side);
-        let render_type = chain.iter().find_map(|m| m.render_type.clone());
-        let geometry = chain.iter().find(|m| m.elements.is_some()).map(Arc::clone);
+        let geometry = chain
+            .iter()
+            .find(|m| m.elements.is_some())
+            .map(|m| Arc::clone(m));
        let generated = chain
            .iter()
            .zip(&names)
@@ -272,68 +152,10 @@ impl ModelLibrary {
        };
        // Resolve aliases only after applying every child override. A reference
        // inherited from a parent binds to the child's final slot definition.
-        let mut slots: BTreeMap<String, &TextureSlot> =
-            fallback.iter().map(|(k, v)| (k.clone(), v)).collect();
-        for model in chain.iter().rev() {
+        let mut slots = BTreeMap::new();
+        for model in chain.into_iter().rev() {
            slots.extend(model.textures.iter().map(|(k, v)| (k.clone(), v)));
        }
-        if let Some(child) = child {
-            slots.extend(child.iter().map(|(k, v)| (k.clone(), v)));
-        }
-        let loader = match chain.iter().find_map(|m| m.loader.as_ref()) {
-            Some(Loader::Composite {
-                children,
-                visibility,
-            }) => {
-                let inherited: BTreeMap<String, TextureSlot> = slots
-                    .iter()
-                    .map(|(k, v)| (k.clone(), (*v).clone()))
-                    .collect();
-                // A model closer to the leaf overrides the loader's own map.
-                let mut visibility = visibility.clone();
-                for model in chain.iter().rev() {
-                    visibility.extend(model.visibility.iter().map(|(k, v)| (k.clone(), *v)));
-                }
-                let mut resolved = Vec::new();
-                for (child_name, child_model) in children {
-                    if visibility.get(child_name) == Some(&false) {
-                        continue;
-                    }
-                    resolved.push(self.resolve_chain(
-                        vec![Arc::clone(child_model)],
-                        vec![format!("{}#{child_name}", names[0])],
-                        child_model.parent.clone(),
-                        &inherited,
-                        None,
-                        depth + 1,
-                    )?);
-                }
-                Some(ResolvedLoader::Composite(resolved))
-            }
-            Some(Loader::Obj {
-                model,
-                flip_v,
-                shade_quads,
-                mtl_override,
-            }) => {
-                // Leaf wins: a model closer to the leaf overrides its parents' entries.
-                let mut visibility = BTreeMap::new();
-                for model in chain.iter().rev() {
-                    visibility.extend(model.visibility.iter().map(|(k, v)| (k.clone(), *v)));
-                }
-                Some(ResolvedLoader::Obj {
-                    model: self.load_obj(&names[0], model, mtl_override.as_deref()),
-                    flip_v: *flip_v,
-                    shade: shade_quads.unwrap_or(true),
-                    hidden: visibility
-                        .into_iter()
-                        .filter(|(_, shown)| !shown)
-                        .map(|(name, _)| name)
-                        .collect(),
-                })
-            }
-            Some(Loader::Unknown(_)) | None => None,
-        };
        let mut textures = BTreeMap::<String, Material>::new();
        let mut unresolved_textures = BTreeSet::<String>::new();
        for start in slots.keys() {
@@ -375,61 +197,12 @@ impl ModelLibrary {
            display,
            textures,
            unresolved_textures,
-            render_type,
            geometry,
            generated,
-            loader,
-        })
-    }
-    /// Parse an obj and its materials once; a failure warns once and yields no geometry.
-    fn load_obj(&self, label: &str, model: &str, mtl: Option<&str>) -> Option<Arc<ObjModel>> {
-        let key = (model.to_owned(), mtl.map(str::to_owned));
-        let mut cache = self.objs.lock().unwrap_or_else(|e| e.into_inner());
-        if let Some(found) = cache.get(&key) {
-            return found.clone();
-        }
-        let loaded = self.read_obj(model, mtl);
-        if let Err(message) = &loaded {
-            log::warn!("Horizon: obj model {label} ({model}): {message}");
-        }
-        let loaded = loaded.ok().map(Arc::new);
-        cache.insert(key, loaded.clone());
-        loaded
-    }
-    fn read_obj(&self, model: &str, mtl: Option<&str>) -> std::result::Result<ObjModel, String> {
-        let assets = self.assets.as_ref().ok_or("no asset source")?;
-        let text = assets.read_text(model).ok_or("file not found")?;
-        let parsed = parse_obj(&text)?;
-        let mtl = match (mtl, &parsed.mtllib) {
-            (Some(location), _) => Some(location.to_owned()),
-            (None, Some(file)) if file.contains(':') => Some(file.clone()),
-            (None, Some(file)) => {
-                let (namespace, path) = model.split_once(':').unwrap_or(("minecraft", model));
-                let directory = path.rsplit_once('/').map_or("", |(dir, _)| dir);
-                Some(if directory.is_empty() {
-                    format!("{namespace}:{file}")
-                } else {
-                    format!("{namespace}:{directory}/{file}")
-                })
-            }
-            (None, None) => None,
-        };
-        let materials = match mtl {
-            Some(location) => match assets.read_text(&location) {
-                Some(text) => parse_mtl(&text),
-                None => {
-                    log::warn!("Horizon: obj material file {location} not found");
-                    BTreeMap::new()
-                }
-            },
-            None => BTreeMap::new(),
-        };
-        Ok(ObjModel {
-            faces: parsed.faces,
-            materials,
        })
    }
 }
+
 /// The native missing-model cube uses slot names without a leading '#'.
 pub fn missing_model() -> CuboidModel {
    let faces = Direction::ALL
@@ -443,15 +216,12 @@ pub fn missing_model() -> CuboidModel {
                    texture: "missingno".to_owned(),
                    uv: Some([0.0, 0.0, 16.0, 16.0]),
                    rotation: 0,
-                    light_emission: None,
-                    neoforge_data: None,
                }),
            )
        })
        .collect();
    CuboidModel {
        parent: None,
-        loader: None,
        ambient_occlusion: None,
        gui_light: None,
        elements: Some(vec![Some(Element {
@@ -461,12 +231,10 @@ pub fn missing_model() -> CuboidModel {
            rotation: None,
            shade_direction_override: None,
            light_emission: 0,
-            neoforge_data: None,
        })]),
        display: Some(ItemTransforms {
            contexts: std::array::from_fn(|_| DisplayTransform::Inherit),
        }),
-        render_type: None,
        textures: BTreeMap::from([
            (
                "particle".to_owned(),
@@ -480,7 +248,6 @@ pub fn missing_model() -> CuboidModel {
                }),
            ),
        ]),
-        visibility: BTreeMap::new(),
    }
 }

@@ -507,195 +274,6 @@ mod tests {
            }
        );
    }
-    fn library(models: &[(&str, &str)]) -> ModelLibrary {
-        ModelLibrary::with_item_generator(
-            models
-                .iter()
-                .map(|(name, json)| (name.to_string(), CuboidModel::from_json(json).unwrap()))
-                .collect(),
-        )
-        .unwrap()
-    }
-    const GENERATED: &str = r#"{"parent":"builtin/generated","display":{"ground":{"translation":[0,2,0],"scale":[0.5,0.5,0.5]}}}"#;
-    const CIT: &str = "horizon_cit:minecraft/optifine/cit/x";
-    #[test]
-    fn child_textures_replace_slots_and_rebind_the_generated_particle() {
-        let library = library(&[
-            ("item/generated", GENERATED),
-            (
-                "item/stick",
-                r#"{"parent":"item/generated","textures":{"layer0":"item/stick"}}"#,
-            ),
-        ]);
-        let child = BTreeMap::from([(
-            "layer0".to_owned(),
-            TextureSlot::Material(Material {
-                sprite: CIT.to_owned(),
-                force_translucent: false,
-            }),
-        )]);
-        let model = library.resolve_with_textures("item/stick", &child).unwrap();
-        assert!(model.uses_item_generator());
-        assert_eq!(model.material("layer0").unwrap().unwrap().sprite, CIT);
-        assert_eq!(model.material("particle").unwrap().unwrap().sprite, CIT);
-        assert_eq!(
-            model.display.contexts[6],
-            DisplayTransform::Explicit(Some(ItemTransform {
-                rotation: [0.0; 3],
-                translation: [0.0, 0.125, 0.0],
-                scale: [0.5; 3],
-            }))
-        );
-        // The library itself is untouched.
-        let plain = library.resolve("item/stick").unwrap();
-        assert_eq!(
-            plain.material("particle").unwrap().unwrap().sprite,
-            "minecraft:item/stick"
-        );
-    }
-    #[test]
-    fn overlaid_models_inherit_from_the_library_and_share_the_rest() {
-        let base = library(&[
-            ("item/generated", GENERATED),
-            (
-                "item/handheld",
-                r#"{"parent":"item/generated","display":{"thirdperson_righthand":{"rotation":[0,-90,55]}}}"#,
-            ),
-            (
-                "item/stick",
-                r#"{"parent":"item/generated","textures":{"layer0":"item/stick"}}"#,
-            ),
-            (
-                "item/apple",
-                r#"{"parent":"item/generated","textures":{"layer0":"item/apple"}}"#,
-            ),
-        ]);
-        let cit = format!(r#"{{"parent":"item/handheld","textures":{{"layer0":"{CIT}"}}}}"#);
-        let over = base
-            .overlaid(BTreeMap::from([
-                (CIT.to_owned(), CuboidModel::from_json(&cit).unwrap()),
-                (
-                    "item/stick".to_owned(),
-                    CuboidModel::from_json(
-                        r#"{"parent":"item/generated","textures":{"layer0":"item/bone"}}"#,
-                    )
-                    .unwrap(),
-                ),
-            ]))
-            .unwrap();
-        let model = over.resolve(CIT).unwrap();
-        assert!(model.uses_item_generator());
-        assert_eq!(model.material("particle").unwrap().unwrap().sprite, CIT);
-        let DisplayTransform::Explicit(Some(right)) = &model.display.contexts[1] else {
-            panic!("handheld's right-hand transform is inherited");
-        };
-        assert_eq!(right.rotation, [0.0, -90.0, 55.0]);
-        let sprite = |l: &ModelLibrary| {
-            l.resolve("item/stick").unwrap().textures["layer0"]
-                .sprite
-                .clone()
-        };
-        assert_eq!(sprite(&over), "minecraft:item/bone");
-        assert_eq!(sprite(&base), "minecraft:item/stick");
-        assert!(!base.resolve(CIT).unwrap().uses_item_generator());
-        assert!(Arc::ptr_eq(
-            &base.models["minecraft:item/apple"],
-            &over.models["minecraft:item/apple"]
-        ));
-    }
-    fn material(sprite: &str) -> TextureSlot {
-        TextureSlot::Material(Material {
-            sprite: sprite.to_owned(),
-            force_translucent: false,
-        })
-    }
-    #[test]
-    fn child_slots_take_part_in_reference_chains() {
-        let library = library(&[
-            (
-                "item/two",
-                r##"{"textures":{"layer0":"#tex","layer1":"item/b","tex":"item/a"}}"##,
-            ),
-            ("horizon:loop", r#"{"parent":"horizon:loop2"}"#),
-            ("horizon:loop2", r#"{"parent":"horizon:loop"}"#),
-        ]);
-        let child = BTreeMap::from([
-            // A base alias binds through a slot only the child sets...
-            ("tex".to_owned(), material(CIT)),
-            // ...and a child alias through the base's slots.
-            (
-                "particle".to_owned(),
-                TextureSlot::Reference("layer1".to_owned()),
-            ),
-            // A child alias to itself resolves to nothing, without looping.
-            ("self".to_owned(), TextureSlot::Reference("self".to_owned())),
-        ]);
-        let model = library.resolve_with_textures("item/two", &child).unwrap();
-        assert_eq!(model.material("layer0").unwrap().unwrap().sprite, CIT);
-        assert_eq!(
-            model.material("particle").unwrap().unwrap().sprite,
-            "minecraft:item/b"
-        );
-        assert_eq!(model.material("self").unwrap(), None);
-        assert!(model.unresolved_textures.contains("self"));
-        // An absent base is the missing cube under the child; a cyclic one an error.
-        let absent = library
-            .resolve_with_textures("item/absent", &child)
-            .unwrap();
-        assert_eq!(absent.elements().len(), 1);
-        assert!(
-            library
-                .resolve_with_textures("horizon:loop", &child)
-                .is_err()
-        );
-    }
-    #[test]
-    fn an_overlay_replaces_parents_but_not_the_built_ins_and_refuses_twins() {
-        let base = library(&[
-            ("item/generated", GENERATED),
-            ("item/handheld", r#"{"parent":"item/generated"}"#),
-            (
-                "item/sword",
-                r#"{"parent":"item/handheld","textures":{"layer0":"item/sword"}}"#,
-            ),
-        ]);
-        let model = |json: &str| CuboidModel::from_json(json).unwrap();
-        let over = base
-            .overlaid(BTreeMap::from([
-                (
-                    "item/handheld".to_owned(),
-                    model(
-                        r#"{"parent":"item/generated","display":{"head":{"rotation":[0,45,0]}}}"#,
-                    ),
-                ),
-                // Neither built-in can be replaced.
-                ("builtin/missing".to_owned(), model(r#"{"elements":[]}"#)),
-                ("builtin/generated".to_owned(), model("{}")),
-            ]))
-            .unwrap();
-        // The base's sword sees the overlay's parent; the base library does not.
-        let head = |l: &ModelLibrary| l.resolve("item/sword").unwrap().display.contexts[4].clone();
-        let DisplayTransform::Explicit(Some(rotated)) = head(&over) else {
-            panic!("the replaced parent's head transform");
-        };
-        assert_eq!(rotated.rotation, [0.0, 45.0, 0.0]);
-        assert_ne!(head(&base), head(&over));
-        // The generator kept: its `particle: #layer0`, which `{}` would drop.
-        let sword = over.resolve("item/sword").unwrap();
-        assert_eq!(
-            sword.material("particle").unwrap().unwrap().sprite,
-            "minecraft:item/sword"
-        );
-        // The missing cube kept, looked up by its own name, not as a fallback.
-        let missing = over.resolve("builtin/missing").unwrap();
-        assert_eq!(missing.elements().len(), 1);
-        // Two spellings of one id.
-        let twins = BTreeMap::from([
-            ("item/x".to_owned(), model("{}")),
-            ("minecraft:item/x".to_owned(), model("{}")),
-        ]);
-        assert!(base.overlaid(twins).is_err());
-    }
    #[test]
    fn absent_parents_fall_back_but_cycles_invalidate_descendants() {
        let a = CuboidModel::from_json(r#"{"parent":"horizon:b"}"#).unwrap();
@@ -715,115 +293,4 @@ mod tests {
            "minecraft:missingno"
        );
    }
-    #[test]
-    fn a_model_resolves_only_with_its_whole_parent_chain() {
-        let library = library(&[
-            ("item/generated", GENERATED),
-            (
-                "item/stick",
-                r#"{"parent":"item/generated","textures":{"layer0":"item/stick"}}"#,
-            ),
-            ("item/orphan", r#"{"parent":"item/gone"}"#),
-            ("item/a", r#"{"parent":"item/b"}"#),
-            ("item/b", r#"{"parent":"item/a"}"#),
-        ]);
-        assert!(library.resolves("item/stick"));
-        assert!(library.resolves("minecraft:item/stick"));
-        assert!(!library.resolves("item/absent"));
-        assert!(!library.resolves("item/orphan"));
-        assert!(!library.resolves("item/a"));
-        assert!(!library.resolves("Item/Stick"));
-    }
-    const LIGHTS: &str = r##"{"textures":{"a":"block/a"},"render_type":"minecraft:cutout","elements":[
-        {"from":[0,0,0],"to":[16,16,16],"light_emission":4,"neoforge_data":{"block_light":9,"color":-65536,"ambient_occlusion":false},
-         "faces":{"north":{"texture":"#a","neoforge_data":{"block_light":2,"sky_light":15,"unknown":1}},
-                  "south":{"texture":"#a","light_emission":11},
-                  "up":{"texture":"#a"}}}]}"##;
-    #[test]
-    fn neoforge_data_of_a_face_overrides_its_element_key_by_key() {
-        use crate::bake::bake_block_model;
-        let library = library(&[("block/lights", LIGHTS)]);
-        let model = library.resolve("block/lights").unwrap();
-        let quads =
-            bake_block_model(&model, crate::bake::BlockModelTransform::new([0; 3], false)).unwrap();
-        let by = |d| quads.iter().find(|q| q.facing == d).unwrap();
-        let north = by(Direction::North);
-        assert_eq!(north.light, [4, 15]);
-        assert_eq!(north.color, Some(-65536));
-        assert_eq!(north.ambient_occlusion, Some(false));
-        assert_eq!(by(Direction::South).light, [11, 11]);
-        assert_eq!(by(Direction::South).light_emission, 11);
-        assert_eq!(by(Direction::Up).light, [9, 4]);
-        assert!(
-            quads
-                .iter()
-                .all(|q| q.render_type == Some(crate::bake::RenderType::Cutout))
-        );
-    }
-    #[test]
-    fn vanilla_models_bake_without_extra_face_data() {
-        use crate::bake::bake_block_model;
-        let library = library(&[(
-            "block/plain",
-            r##"{"textures":{"a":"block/a"},"elements":[{"from":[0,0,0],"to":[16,16,16],"light_emission":6,"faces":{"up":{"texture":"#a"}}}]}"##,
-        )]);
-        let model = library.resolve("block/plain").unwrap();
-        let quad = &bake_block_model(&model, crate::bake::BlockModelTransform::new([0; 3], false))
-            .unwrap()[0];
-        assert_eq!((quad.light, quad.light_emission), ([6, 6], 6));
-        assert_eq!(
-            (quad.color, quad.ambient_occlusion, quad.render_type),
-            (None, None, None)
-        );
-    }
-    #[test]
-    fn render_type_comes_from_the_leaf_most_model_and_loses_its_prefix() {
-        let library = library(&[
-            ("block/base", r#"{"render_type":"translucent"}"#),
-            ("block/mid", r#"{"parent":"block/base"}"#),
-            (
-                "block/leaf",
-                r#"{"parent":"block/mid","render_type":"minecraft:cutout_mipped"}"#,
-            ),
-            ("block/bare", r#"{"parent":"block/mid"}"#),
-        ]);
-        let render = |name| library.resolve(name).unwrap().render_type;
-        assert_eq!(render("block/leaf").as_deref(), Some("cutout_mipped"));
-        assert_eq!(render("block/bare").as_deref(), Some("translucent"));
-        assert_eq!(render("block/absent"), None);
-        assert_eq!(
-            crate::bake::RenderType::by_name("minecraft:tripwire"),
-            Some(crate::bake::RenderType::Tripwire)
-        );
-        assert_eq!(crate::bake::RenderType::by_name("mod:glow"), None);
-    }
-    #[test]
-    fn neoforge_data_colour_and_legacy_emission_spellings() {
-        let model = CuboidModel::from_json(
-            r##"{"elements":[{"from":[0,0,0],"to":[1,1,1],"faces":{
-                "up":{"texture":"#a","neoforge_data":{"color":"#80FF0000","light_emission":7}},
-                "down":{"texture":"#a","neoforge_data":{"color":4294967295,"block_light":99}}}}]}"##,
-        )
-        .unwrap();
-        let elements = model.elements.unwrap();
-        let faces = &elements[0].as_ref().unwrap().faces;
-        let up = faces[&Direction::Up]
-            .as_ref()
-            .unwrap()
-            .neoforge_data
-            .unwrap();
-        assert_eq!(
-            (up.color, up.block_light, up.sky_light),
-            (Some(0x80FF0000u32 as i32), Some(7), Some(7))
-        );
-        let down = faces[&Direction::Down]
-            .as_ref()
-            .unwrap()
-            .neoforge_data
-            .unwrap();
-        assert_eq!(
-            (down.color, down.block_light, down.sky_light),
-            (Some(-1), Some(15), None)
-        );
-    }
 }
@@ -202,8 +202,10 @@ fn os_version() -> Option<String> {
 #[cfg(target_os = "linux")]
 fn cpu() -> Option<String> {
    let info = std::fs::read_to_string("/proc/cpuinfo").ok()?;
-    // x86 names the CPU per core; arm64 only gives the core's implementer and part.
-    horizon_telemetry::system::linux_cpu_name(&info)
+    // x86 names the CPU per core; ARM boards name the machine once.
+    key_value(&info, "model name", ':')
+        .or_else(|| key_value(&info, "Model", ':'))
+        .map(str::to_owned)
 }

 #[cfg(target_os = "linux")]
@@ -225,12 +227,12 @@ fn key_value<'a>(text: &'a str, key: &str, sep: char) -> Option<&'a str> {

 #[cfg(target_os = "windows")]
 fn os_version() -> Option<String> {
-    horizon_telemetry::system::windows_version()
+    output("cmd", &["/C", "ver"])
 }

 #[cfg(target_os = "windows")]
 fn cpu() -> Option<String> {
-    horizon_telemetry::system::windows_cpu()
+    std::env::var("PROCESSOR_IDENTIFIER").ok()
 }

 #[cfg(target_os = "windows")]
@@ -279,16 +281,4 @@ mod tests {
            assert!(cpu_seconds(std::process::id()).unwrap() >= 0.0);
        }
    }
-
-    /// `hardware.cpu` is the brand name, not the family and model `PROCESSOR_IDENTIFIER` holds.
-    #[cfg(windows)]
-    #[test]
-    fn windows_reports_the_cpu_brand() {
-        let cpu = Hardware::detect().cpu.expect("a CPU name");
-        assert!(
-            !cpu.is_empty() && !cpu.contains(" Family ") && !cpu.contains("Stepping"),
-            "family and model, not a name: {cpu:?}"
-        );
-        assert_eq!(cpu, cpu.trim());
-    }
 }
@@ -6,16 +6,9 @@
 //! and `force-gamemode=true`): they never touch blocks, so they need no world of their own, and no server
 //! can refuse their moves for walking into terrain. Every behaviour is deterministic from `--seed`.
 //!
-//! `--behaviour fight` is the exception: the bots play in survival (`gamemode=survival`, `force-gamemode=true`,
-//! and `allow-flight=true` because they hold their spawn height instead of standing on terrain they cannot
-//! see). They track the entities the server sends, walk to the nearest living one and attack it at vanilla's
-//! bare-hand cooldown (every 5 ticks). With `--pvp true` (the default) the other bots are targets too, which
-//! hurts only when the server has `pvp=true`.
-//!
 //!   horizon-bots --server 127.0.0.1:25565 --bots 25 --behaviour mixed --seconds 360 --report bots.json
 //!
-//! It prints one JSON line a second (bots online, chunks received), one with the first bot's spawn position, and
-//! writes a summary with `--report`.
+//! It prints one JSON line a second (bots online, chunks received) and writes a summary with `--report`.
 //! A bot moves only while it holds the chunk it stands in: vanilla's client stops ticking its player in a chunk
 //! it hasn't received, so a player can't outrun the server's chunk sending, on any server.
 //! Each bot also keeps the chunks it holds, as a client's chunk cache does, so the report tells chunks that
@@ -30,7 +23,7 @@ use horizon_protocol::{
    buf::{Reader, Writer},
    connection::{ConnWriter, Connection, Counters},
    crypto::offline_uuid,
-    entity_data, ids,
+    ids,
    item::Stack,
    packets::{
        Empty, configuration,
@@ -41,7 +34,7 @@ use horizon_protocol::{
 };
 use serde_json::json;
 use std::{
-    collections::{BTreeMap, HashSet},
+    collections::HashSet,
    sync::{
        Arc, LazyLock, Mutex, OnceLock,
        atomic::{AtomicBool, AtomicU64, Ordering},
@@ -55,8 +48,7 @@ horizon-bots: load-test bots for a Minecraft Java Edition 26.3 server (offline m

  --server HOST:PORT     default 127.0.0.1:25565
  --bots N               default 10
-  --behaviour B          idle, walk, explore, fight or mixed (60 % walk, 20 % explore, 20 % idle); default mixed.
-                         fight needs gamemode=survival, force-gamemode=true and allow-flight=true.
+  --behaviour B          idle, walk, explore or mixed (60 % walk, 20 % explore, 20 % idle); default mixed.
                         stand: stays on the ground where the server puts it (/tp), for a survival test.
                         One abusive client, to test a server's limits (run it beside a normal crowd):
                         flood-move (--flood moves a tick, each 64 to 256 blocks away, ignoring chunks),
@@ -74,11 +66,8 @@ horizon-bots: load-test bots for a Minecraft Java Edition 26.3 server (offline m
  --attack NAME          attack the player NAME twice a second, from wherever the bot is (a reach test),
                         swinging after each attack as vanilla's client does. NAME,NAME...: each of them
                         in the same tick (a multi-target kill aura, for the anticheat's tests);
-                         the report gives each bot's last health. A UUID instead of a NAME: the
-                         entity with that UUID (a boat summoned with it, say)
+                         the report gives each bot's last health
  --attack-after S       start attacking S seconds after joining; default 5
-  --attack-rounds N      stop after N rounds of attacks (each hits every target seen so far once);
-                         default no limit
  --no-swing             attack without swinging (a kill aura hiding its swing, for the anticheat's tests)
  --no-loaded            never say the level is loaded (ServerboundPlayerLoadedPacket): a vanilla server
                         ignores the player's moves and actions for its first 3 seconds
@@ -89,7 +78,6 @@ horizon-bots: load-test bots for a Minecraft Java Edition 26.3 server (offline m
  --view-distance N      what the bots ask for; default 10
  --seed N               default 12345
  --explore-speed B      blocks a second an explore bot flies; default 22 (as fast as chunks come)
-  --pvp B                fight bots also attack each other (true or false); default true
  --name PREFIX          bot names: PREFIX0, PREFIX1...; default Bot
  --brand B              the client brand sent in configuration (minecraft:brand); default none
  --height H             blocks above spawn the bots fly at (walk, explore, idle); default 24
@@ -103,8 +91,6 @@ horizon-bots: load-test bots for a Minecraft Java Edition 26.3 server (offline m
                         to test what a server takes
  --timer F              cheat, to test an anticheat: tick F times as fast as vanilla's client (1.5: 30 Hz)
  --report FILE          a JSON summary at the end (- prints it after the per-second lines)
-  --capture FILE         record the first bot's play packets (milliseconds since it joined, id, body)
-                         for crates/horizon-protocol/examples/net_replay.rs
 ";

 #[derive(Clone, Copy, Debug, PartialEq)]
@@ -113,7 +99,6 @@ enum Behaviour {
    Stand,
    Walk,
    Explore,
-    Fight,
    FloodMove,
    FloodAcks,
    FloodPackets,
@@ -133,7 +118,6 @@ impl Behaviour {
            Self::Stand => "stand",
            Self::Walk => "walk",
            Self::Explore => "explore",
-            Self::Fight => "fight",
            Self::FloodMove => "flood-move",
            Self::FloodAcks => "flood-acks",
            Self::FloodPackets => "flood-packets",
@@ -158,12 +142,9 @@ struct Options {
    view_distance: i8,
    seed: u64,
    explore_speed: f64,
-    pvp: bool,
-    /// The players or entity UUIDs to attack, how long after joining to start,
-    /// and how many rounds.
+    /// The player to attack, and how long after joining to start.
    attack: Option<String>,
    attack_after: f64,
-    attack_rounds: u32,
    no_swing: bool,
    flood: usize,
    no_read: bool,
@@ -180,8 +161,6 @@ struct Options {
    /// The `minecraft:brand` to send, if any.
    brand: Option<String>,
    report: Option<String>,
-    /// --capture: where the first bot's play packets go.
-    capture: Option<String>,
    /// How many times as fast as vanilla's 20 Hz the bots tick (a timer cheat above 1).
    timer: f64,
 }
@@ -197,10 +176,8 @@ fn options() -> Result<Options, String> {
        view_distance: 10,
        seed: 12345,
        explore_speed: 22.0,
-        pvp: true,
        attack: None,
        attack_after: 5.0,
-        attack_rounds: u32::MAX,
        no_swing: false,
        flood: 100,
        no_read: false,
@@ -212,7 +189,6 @@ fn options() -> Result<Options, String> {
        click: None,
        name: "Bot".into(),
        report: None,
-        capture: None,
        brand: None,
        timer: 1.0,
    };
@@ -255,14 +231,11 @@ fn options() -> Result<Options, String> {
            "--explore-speed" => {
                o.explore_speed = value.parse().map_err(|_| number("blocks a second"))?;
            }
-            "--pvp" => o.pvp = value.parse().map_err(|_| number("true or false"))?,
            "--flood" => o.flood = value.parse().map_err(|_| number("packets a tick"))?,
            "--attack" => o.attack = Some(value),
            "--attack-after" => o.attack_after = value.parse().map_err(|_| number("seconds"))?,
-            "--attack-rounds" => o.attack_rounds = value.parse().map_err(|_| number("a number"))?,
            "--name" => o.name = value,
            "--report" => o.report = Some(value),
-            "--capture" => o.capture = Some(value),
            "--brand" => o.brand = Some(value),
            "--give" => {
                for part in value.split(',') {
@@ -321,11 +294,10 @@ fn options() -> Result<Options, String> {
            _ => return Err(format!("unknown option {arg}; --help lists them")),
        }
    }
-    const BEHAVIOURS: [&str; 16] = [
+    const BEHAVIOURS: [&str; 15] = [
        "idle",
        "walk",
        "explore",
-        "fight",
        "mixed",
        "stand",
        "flood-move",
@@ -341,7 +313,7 @@ fn options() -> Result<Options, String> {
    ];
    if !BEHAVIOURS.contains(&o.behaviour.as_str()) {
        return Err(format!(
-            "--behaviour {}: use idle, walk, explore, fight, mixed or a flood behaviour (--help lists them)",
+            "--behaviour {}: use idle, walk, explore, mixed or a flood behaviour (--help lists them)",
            o.behaviour
        ));
    }
@@ -362,10 +334,6 @@ struct Bot {
    pulled_back: AtomicU64,
    /// Ticks the bot couldn't move because it didn't hold its chunk yet.
    waited: AtomicU64,
-    /// Attack packets sent (fight bots and --attack).
-    attacks: AtomicU64,
-    /// The entities the server tells the bot about (fight bots only).
-    entities: Mutex<Entities>,
    /// The chunks the bot holds (ClientChunkCache).
    held: Mutex<HashSet<(i32, i32)>>,
    /// Where the server last put the bot (a teleport), to start from.
@@ -378,6 +346,7 @@ struct Bot {
    deaf: AtomicBool,
    /// `--attack`: each target's UUID and, once AddEntity showed it, its entity id.
    target: Mutex<Vec<(u128, Option<i32>)>>,
+    attacks: AtomicU64,
    /// The last SetHealth.
    health: Mutex<Option<f32>>,
 }
@@ -415,16 +384,6 @@ fn join_summary(mut times: Vec<u64>) -> serde_json::Value {
    })
 }

-/// An `--attack` target's UUID: a UUID as written (`8-4-4-4-12` hex), else
-/// the offline UUID of the player with that name (a name has no `-`).
-fn target_uuid(name: &str) -> u128 {
-    let hex: String = name.chars().filter(|&c| c != '-').collect();
-    match u128::from_str_radix(&hex, 16) {
-        Ok(uuid) if name.contains('-') && hex.len() == 32 => uuid,
-        _ => offline_uuid(name),
-    }
-}
-
 /// A small deterministic generator (SplitMix64), so every run moves the bots the same way.
 struct Random(u64);
 impl Random {
@@ -440,142 +399,6 @@ impl Random {
    }
 }

-/// Vanilla's bare-hand attack speed is 4 a second: a full-strength swing every 20 / 4 ticks.
-const ATTACK_COOLDOWN_TICKS: u32 = 5;
-/// How far, in blocks, a fight bot strikes (the survival entity interaction range is 3).
-const ATTACK_REACH: f64 = 2.5;
-/// A fight bot walks up to this horizontal distance, so it does not stand inside its target.
-const CLOSE_IN: f64 = 1.5;
-/// Walking speed in blocks a tick.
-const FIGHT_STEP: f64 = 0.215;
-/// `LivingEntity.DATA_HEALTH_ID`: only living entities carry it, and it is sent once it differs from 1.
-const HEALTH_DATA: u8 = 9;
-
-/// What a fight bot knows of one entity.
-#[derive(Clone, Debug, PartialEq)]
-struct Tracked {
-    uuid: u128,
-    pos: [f64; 3],
-    /// Set once the server sends the health of the entity, which only living entities have.
-    health: Option<f32>,
-}
-
-/// The entities around a bot, from AddEntity, the move packets, SetEntityData and RemoveEntities.
-/// Ordered by id, so ties between equally near targets always go to the same entity.
-#[derive(Default)]
-struct Entities(BTreeMap<i32, Tracked>);
-
-impl Entities {
-    fn update(&mut self, id: i32, body: &[u8]) {
-        let Ok(packet) = play::Clientbound::decode(id, body) else {
-            return;
-        };
-        match packet {
-            play::Clientbound::AddEntity(p) => {
-                self.0.insert(
-                    p.id,
-                    Tracked {
-                        uuid: p.uuid,
-                        pos: p.position,
-                        health: None,
-                    },
-                );
-            }
-            play::Clientbound::MoveEntityPos(play::MoveEntityPos(m))
-            | play::Clientbound::MoveEntityPosRot(play::MoveEntityPosRot(m)) => {
-                if let (Some(e), Some(delta)) = (self.0.get_mut(&m.id), &m.delta) {
-                    e.pos = delta.end(e.pos);
-                }
-            }
-            play::Clientbound::EntityPositionSync(p) => {
-                if let Some(e) = self.0.get_mut(&p.id) {
-                    e.pos = p.path.end();
-                }
-            }
-            play::Clientbound::SetEntityData(p) => {
-                if let Some(e) = self.0.get_mut(&p.id) {
-                    for (index, _, value) in &p.values {
-                        if *index == HEALTH_DATA
-                            && let entity_data::Value::Float(health) = value
-                        {
-                            e.health = Some(*health);
-                        }
-                    }
-                }
-            }
-            play::Clientbound::RemoveEntities(p) => {
-                for id in p.ids {
-                    self.0.remove(&id);
-                }
-            }
-            _ => {}
-        }
-    }
-
-    /// The nearest living entity that is not dead; other bots only when `pvp`.
-    fn nearest(&self, from: [f64; 3], pvp: bool, bots: &HashSet<u128>) -> Option<(i32, [f64; 3])> {
-        let mut best: Option<(f64, i32, [f64; 3])> = None;
-        for (id, e) in &self.0 {
-            if !e.health.is_some_and(|h| h > 0.0) || (!pvp && bots.contains(&e.uuid)) {
-                continue;
-            }
-            let d = distance(from, e.pos);
-            if best.is_none_or(|(b, ..)| d < b) {
-                best = Some((d, *id, e.pos));
-            }
-        }
-        best.map(|(_, id, pos)| (id, pos))
-    }
-}
-
-fn distance(a: [f64; 3], b: [f64; 3]) -> f64 {
-    ((a[0] - b[0]).powi(2) + (a[1] - b[1]).powi(2) + (a[2] - b[2]).powi(2)).sqrt()
-}
-
-/// One tick of a fighting bot with a target: walk up to it, and strike once the cooldown is over.
-/// Returns the entity to attack. `since_attack` counts ticks since the last swing.
-fn fight_tick(pos: &mut [f64; 3], target: (i32, [f64; 3]), since_attack: &mut u32) -> Option<i32> {
-    *since_attack = since_attack.saturating_add(1);
-    let (id, at) = target;
-    let (dx, dz) = (at[0] - pos[0], at[2] - pos[2]);
-    let horizontal = dx.hypot(dz);
-    if horizontal > CLOSE_IN {
-        let step = FIGHT_STEP.min(horizontal - CLOSE_IN);
-        pos[0] += dx / horizontal * step;
-        pos[2] += dz / horizontal * step;
-    }
-    if *since_attack >= ATTACK_COOLDOWN_TICKS && distance(*pos, at) <= ATTACK_REACH {
-        *since_attack = 0;
-        return Some(id);
-    }
-    None
-}
-
-/// One tick of walking to random points around the spawn, at sprint speed (5.6 blocks a second).
-fn walk_step(
-    pos: &mut [f64; 3],
-    target: &mut [f64; 3],
-    spawn: [f64; 3],
-    cruise: f64,
-    random: &mut Random,
-) {
-    let (dx, dz) = (target[0] - pos[0], target[2] - pos[2]);
-    let distance = dx.hypot(dz);
-    if distance < 1.0 {
-        let angle = random.unit() * std::f64::consts::TAU;
-        let reach = 8.0 + random.unit() * 40.0;
-        *target = [
-            spawn[0] + angle.cos() * reach,
-            cruise,
-            spawn[2] + angle.sin() * reach,
-        ];
-    } else {
-        let step = 0.28_f64.min(distance);
-        pos[0] += dx / distance * step;
-        pos[2] += dz / distance * step;
-    }
-}
-
 /// One bot thread that panics poisons the locks it held; the others and the report go on.
 fn lock<T>(m: &Mutex<T>) -> std::sync::MutexGuard<'_, T> {
    m.lock().unwrap_or_else(std::sync::PoisonError::into_inner)
@@ -826,53 +649,11 @@ impl BatchSize {
    }
 }

-/// `--capture`: one record per play packet, little-endian: u32 milliseconds since the
-/// bot joined, i32 packet id, u32 body length, then the body (without the id).
-struct Capture {
-    out: std::io::BufWriter<std::fs::File>,
-    start: Instant,
-    /// The second last flushed: the process may end before the reader thread does.
-    flushed: u32,
-}
-impl Capture {
-    fn create(path: &str) -> Option<Self> {
-        match std::fs::File::create(path) {
-            Ok(file) => Some(Self {
-                out: std::io::BufWriter::new(file),
-                start: Instant::now(),
-                flushed: 0,
-            }),
-            Err(e) => {
-                eprintln!("--capture {path}: {e}");
-                None
-            }
-        }
-    }
-    fn record(&mut self, id: i32, body: &[u8]) {
-        use std::io::Write;
-        let ms = self.start.elapsed().as_millis() as u32;
-        let mut head = [0u8; 12];
-        head[..4].copy_from_slice(&ms.to_le_bytes());
-        head[4..8].copy_from_slice(&id.to_le_bytes());
-        head[8..].copy_from_slice(&(body.len() as u32).to_le_bytes());
-        let _ = self
-            .out
-            .write_all(&head)
-            .and_then(|()| self.out.write_all(body));
-        if ms / 1000 != self.flushed {
-            self.flushed = ms / 1000;
-            let _ = self.out.flush();
-        }
-    }
-}
-
 /// Reads the play state: answers what a client must answer, counts chunks, records teleports.
 fn read(
    mut reader: horizon_protocol::connection::ConnReader,
    writer: Arc<Mutex<ConnWriter>>,
    bot: Arc<Bot>,
-    track: bool,
-    mut capture: Option<Capture>,
 ) {
    use ids::play::clientbound as cb;
    use ids::play::serverbound as sb;
@@ -896,9 +677,6 @@ fn read(
                return;
            }
        };
-        if let Some(c) = &mut capture {
-            c.record(id, &body);
-        }
        let mut r = Reader::new(&body);
        let sent = match id {
            cb::KEEP_ALIVE => match r.i64() {
@@ -938,9 +716,6 @@ fn read(
                        }
                    }
                }
-                if track {
-                    lock(&bot.entities).update(id, &body);
-                }
                Ok(())
            }
            cb::SET_HEALTH => {
@@ -993,16 +768,6 @@ fn read(
                }
                _ => Ok(()),
            },
-            cb::MOVE_ENTITY_POS
-            | cb::MOVE_ENTITY_POS_ROT
-            | cb::ENTITY_POSITION_SYNC
-            | cb::SET_ENTITY_DATA
-            | cb::REMOVE_ENTITIES
-                if track =>
-            {
-                lock(&bot.entities).update(id, &body);
-                Ok(())
-            }
            cb::DISCONNECT | cb::START_CONFIGURATION => {
                bot.online.store(false, Ordering::SeqCst);
                *lock(&bot.error) = Some(if id == cb::DISCONNECT {
@@ -1032,7 +797,6 @@ fn run_bot(
    o: Arc<Options>,
    index: usize,
    behaviour: Behaviour,
-    bots: Arc<HashSet<u128>>,
    bot: Arc<Bot>,
    until: Arc<Mutex<Option<Instant>>>,
 ) {
@@ -1052,16 +816,12 @@ fn run_bot(
        .attack
        .iter()
        .flat_map(|names| names.split(','))
-        .map(|name| (target_uuid(name), None))
+        .map(|name| (offline_uuid(name), None))
        .collect();
    bot.online.store(true, Ordering::SeqCst);
    {
        let (writer, bot) = (writer.clone(), bot.clone());
-        let track = behaviour == Behaviour::Fight;
-        let capture = (index == 0)
-            .then(|| o.capture.as_deref().and_then(Capture::create))
-            .flatten();
-        thread::spawn(move || read(reader, writer, bot, track, capture));
+        thread::spawn(move || read(reader, writer, bot));
    }
    use ids::play::serverbound as sb;
    // Wait for the spawn position.
@@ -1079,10 +839,6 @@ fn run_bot(
    };
    bot.joined_after_ms
        .store(asked.elapsed().as_millis() as u64, Ordering::SeqCst);
-    if index == 0 {
-        // Where the bots gather, for a client that comes to watch them (tools/perf_bench.py --server-bots).
-        println!("{}", json!({ "spawn": spawn }));
-    }
    let send = |body: Vec<u8>| lock(&writer).send(&body).is_ok();
    if !o.no_loaded {
        send(raw(sb::PLAYER_LOADED, |_| {}));
@@ -1114,16 +870,9 @@ fn run_bot(
        send(play::Serverbound::SetCarriedItem(play::SetCarriedItem { slot: 0 }).encode());
    }
    let mut sequence = 0;
-    let mut rounds = 0;
    let mut random = Random(o.seed ^ (index as u64).wrapping_mul(0x2545_F491_4F6C_DD1D));
    let mut pos = spawn;
-    // Fight bots stay at their spawn height; the others climb to fly above the terrain.
-    let cruise = if behaviour == Behaviour::Fight {
-        spawn[1]
-    } else {
-        spawn[1] + o.height
-    };
-    let mut since_attack = ATTACK_COOLDOWN_TICKS;
+    let cruise = spawn[1] + o.height;
    let heading = random.unit() * std::f64::consts::TAU;
    let mut target = pos;
    let mut next = Instant::now();
@@ -1177,22 +926,22 @@ fn run_bot(
        } else {
            match behaviour {
                Behaviour::Idle | Behaviour::Stand => {}
-                Behaviour::Walk => walk_step(&mut pos, &mut target, spawn, cruise, &mut random),
-                Behaviour::Fight => {
-                    let near = lock(&bot.entities).nearest(pos, o.pvp, &bots);
-                    if let Some(near) = near {
-                        if let Some(victim) = fight_tick(&mut pos, near, &mut since_attack) {
-                            // The client sends the attack, then swings the arm.
-                            let sent = send(
-                                play::Serverbound::Attack(play::Attack { id: victim }).encode(),
-                            ) && send(raw(sb::PUNCH, |w| w.varint(0)));
-                            if sent {
-                                bot.attacks.fetch_add(1, Ordering::Relaxed);
-                            }
-                        }
+                Behaviour::Walk => {
+                    let (dx, dz) = (target[0] - pos[0], target[2] - pos[2]);
+                    let distance = dx.hypot(dz);
+                    if distance < 1.0 {
+                        let angle = random.unit() * std::f64::consts::TAU;
+                        let reach = 8.0 + random.unit() * 40.0;
+                        target = [
+                            spawn[0] + angle.cos() * reach,
+                            cruise,
+                            spawn[2] + angle.sin() * reach,
+                        ];
                    } else {
-                        since_attack = since_attack.saturating_add(1);
-                        walk_step(&mut pos, &mut target, spawn, cruise, &mut random);
+                        // Sprinting: 5.6 blocks a second.
+                        let step = 0.28_f64.min(distance);
+                        pos[0] += dx / distance * step;
+                        pos[2] += dz / distance * step;
                    }
                }
                Behaviour::FloodMove
@@ -1278,13 +1027,8 @@ fn run_bot(
                send(body);
            }
        }
-        if joined.elapsed().as_secs_f64() >= o.attack_after
-            && tick % 10 == 0
-            && rounds < o.attack_rounds
-        {
+        if joined.elapsed().as_secs_f64() >= o.attack_after && tick % 10 == 0 {
            let targets: Vec<i32> = lock(&bot.target).iter().filter_map(|t| t.1).collect();
-            // A round counts once a target is known.
-            rounds += u32::from(!targets.is_empty());
            for id in targets {
                send(play::Serverbound::Attack(play::Attack { id }).encode());
                // Minecraft.startAttack swings right after the attack.
@@ -1300,10 +1044,7 @@ fn run_bot(
                x: pos[0],
                y: pos[1],
                z: pos[2],
-                // Fight bots stand on the ground; the others fly.
-                flags: u8::from(
-                    matches!(behaviour, Behaviour::Fight | Behaviour::Stand) || o.ground,
-                ),
+                flags: u8::from(behaviour == Behaviour::Stand || o.ground),
            })
            .encode(),
        ) && send(raw(sb::CLIENT_TICK_END, |_| {}));
@@ -1330,7 +1071,6 @@ fn behaviour_of(mode: &str, index: usize) -> Behaviour {
        "stand" => Behaviour::Stand,
        "walk" => Behaviour::Walk,
        "explore" => Behaviour::Explore,
-        "fight" => Behaviour::Fight,
        "flood-move" => Behaviour::FloodMove,
        "flood-acks" => Behaviour::FloodAcks,
        "flood-packets" => Behaviour::FloodPackets,
@@ -1361,23 +1101,14 @@ fn main() {
    let start = Instant::now();
    let until: Arc<Mutex<Option<Instant>>> = Arc::new(Mutex::new(None));
    let bots: Vec<Arc<Bot>> = (0..o.bots).map(|_| Arc::new(Bot::default())).collect();
-    // The uuids of all bots, so that `--pvp false` leaves them alone.
-    let bot_uuids: Arc<HashSet<u128>> = Arc::new(
-        (0..o.bots)
-            .map(|i| offline_uuid(&format!("{}{i}", o.name)))
-            .collect(),
-    );
    let launcher = {
        let (o, bots, until) = (o.clone(), bots.clone(), until.clone());
-        let bot_uuids = bot_uuids.clone();
        thread::spawn(move || {
            let mut handles = Vec::new();
            for (i, bot) in bots.iter().enumerate() {
                let (o2, bot, until) = (o.clone(), bot.clone(), until.clone());
-                let (behaviour, uuids) = (behaviour_of(&o.behaviour, i), bot_uuids.clone());
-                handles.push(thread::spawn(move || {
-                    run_bot(o2, i, behaviour, uuids, bot, until);
-                }));
+                let behaviour = behaviour_of(&o.behaviour, i);
+                handles.push(thread::spawn(move || run_bot(o2, i, behaviour, bot, until)));
                thread::sleep(Duration::from_secs_f64(o.join_every));
            }
            handles
@@ -1414,7 +1145,6 @@ fn main() {
                "resent": total(|b| &b.resent),
                "pulled_back": total(|b| &b.pulled_back),
                "waited_ticks": total(|b| &b.waited),
-                "attacks": total(|b| &b.attacks),
            })
        );
        previous_chunks = chunks;
@@ -1434,7 +1164,6 @@ fn main() {
        "behaviour": o.behaviour,
        "seed": o.seed,
        "explore_speed": o.explore_speed,
-        "pvp": o.pvp,
        "view_distance": o.view_distance,
        "seconds": o.seconds,
        "joined": bots.iter().filter(|b| b.joined_after_ms.load(Ordering::SeqCst) > 0).count(),
@@ -1442,7 +1171,6 @@ fn main() {
        "resent": bots.iter().map(|b| b.resent.load(Ordering::Relaxed)).sum::<u64>(),
        "pulled_back": bots.iter().map(|b| b.pulled_back.load(Ordering::Relaxed)).sum::<u64>(),
        "waited_ticks": bots.iter().map(|b| b.waited.load(Ordering::Relaxed)).sum::<u64>(),
-        "attacks": bots.iter().map(|b| b.attacks.load(Ordering::Relaxed)).sum::<u64>(),
        "bytes_in": bots.iter().map(|b| b.bytes_in()).sum::<u64>(),
        "bytes_out": bots.iter().map(|b| b.bytes_out()).sum::<u64>(),
        "join_time": join_summary(
@@ -1495,137 +1223,6 @@ fn main() {
 #[cfg(test)]
 mod tests {
    use super::*;
-    use play::{
-        AddEntity, Clientbound, MoveEntity, MoveEntityPos, RemoveEntities, SetEntityData, VecDelta,
-    };
-
-    fn feed(entities: &mut Entities, packet: &Clientbound) {
-        let bytes = packet.encode();
-        let mut r = Reader::new(&bytes);
-        let id = r.varint().unwrap();
-        entities.update(id, &bytes[bytes.len() - r.remaining()..]);
-    }
-
-    fn add(id: i32, uuid: u128, pos: [f64; 3]) -> Clientbound {
-        Clientbound::AddEntity(AddEntity {
-            id,
-            uuid,
-            kind: 1,
-            position: pos,
-            velocity: [0.0; 3],
-            pitch: 0,
-            yaw: 0,
-            head_yaw: 0,
-            data: 0,
-        })
-    }
-
-    fn health(id: i32, health: f32) -> Clientbound {
-        Clientbound::SetEntityData(SetEntityData {
-            id,
-            values: vec![(HEALTH_DATA, 3, entity_data::Value::Float(health))],
-        })
-    }
-
-    /// `--attack`: a UUID names that entity, anything else a player.
-    #[test]
-    fn attack_targets_a_uuid_or_a_player() {
-        assert_eq!(target_uuid("00000000-0000-0000-0000-00000000000a"), 10);
-        assert_eq!(
-            target_uuid("0000000a-0000-0001-0000-000000000002"),
-            0x0000000a_0000_0001_0000_000000000002
-        );
-        assert_eq!(target_uuid("V0"), offline_uuid("V0"));
-        // A name of 32 hex digits is a name: a UUID is written with dashes.
-        let name = "0123456789abcdef0123456789abcdef";
-        assert_eq!(target_uuid(name), offline_uuid(name));
-    }
-
-    #[test]
-    fn tracks_living_entities_only() {
-        let mut e = Entities::default();
-        feed(&mut e, &add(1, 10, [3.0, 64.0, 0.0]));
-        feed(&mut e, &add(2, 11, [5.0, 64.0, 0.0]));
-        feed(&mut e, &health(2, 20.0));
-        // Entity 1 never sent a health (an item, an arrow), so it is no target.
-        assert_eq!(
-            e.nearest([0.0, 64.0, 0.0], true, &HashSet::new()),
-            Some((2, [5.0, 64.0, 0.0]))
-        );
-        feed(&mut e, &health(2, 0.0));
-        assert_eq!(e.nearest([0.0, 64.0, 0.0], true, &HashSet::new()), None);
-        feed(&mut e, &health(2, 4.0));
-        feed(
-            &mut e,
-            &Clientbound::RemoveEntities(RemoveEntities { ids: vec![2] }),
-        );
-        assert_eq!(e.nearest([0.0, 64.0, 0.0], true, &HashSet::new()), None);
-    }
-
-    #[test]
-    fn moves_follow_the_deltas() {
-        let mut e = Entities::default();
-        feed(&mut e, &add(7, 1, [0.0, 64.0, 0.0]));
-        feed(&mut e, &health(7, 20.0));
-        feed(
-            &mut e,
-            &Clientbound::MoveEntityPos(MoveEntityPos(MoveEntity {
-                id: 7,
-                delta: Some(VecDelta::Linear([4096, 0, -8192])),
-                rotation: None,
-                on_ground: true,
-            })),
-        );
-        assert_eq!(e.0[&7].pos, [1.0, 64.0, -2.0]);
-    }
-
-    #[test]
-    fn pvp_false_spares_the_bots_and_ties_go_to_the_lowest_id() {
-        let mut e = Entities::default();
-        feed(&mut e, &add(9, 100, [2.0, 64.0, 0.0]));
-        feed(&mut e, &add(4, 101, [-2.0, 64.0, 0.0]));
-        feed(&mut e, &add(5, 102, [0.0, 64.0, 6.0]));
-        for id in [9, 4, 5] {
-            feed(&mut e, &health(id, 20.0));
-        }
-        let bots = HashSet::from([100, 101]);
-        let from = [0.0, 64.0, 0.0];
-        assert_eq!(e.nearest(from, true, &bots).map(|t| t.0), Some(4));
-        assert_eq!(e.nearest(from, false, &bots).map(|t| t.0), Some(5));
-    }
-
-    #[test]
-    fn attacks_at_the_vanilla_cooldown() {
-        let mut pos = [0.0, 64.0, 0.0];
-        let target = (3, [1.0, 64.0, 0.0]);
-        let mut since = ATTACK_COOLDOWN_TICKS;
-        let hits: Vec<u32> = (0..40)
-            .filter_map(|tick| fight_tick(&mut pos, target, &mut since).map(|_| tick))
-            .collect();
-        assert_eq!(hits[0], 0, "a bot in reach strikes at once");
-        assert!(
-            hits.windows(2)
-                .all(|w| w[1] - w[0] == ATTACK_COOLDOWN_TICKS)
-        );
-        assert_eq!(hits.len(), 8);
-    }
-
-    #[test]
-    fn walks_into_reach_before_striking() {
-        let mut pos = [0.0, 64.0, 0.0];
-        let target = (3, [10.0, 64.0, 0.0]);
-        let mut since = ATTACK_COOLDOWN_TICKS;
-        let mut first = None;
-        for tick in 0..100 {
-            if fight_tick(&mut pos, target, &mut since).is_some() {
-                first = Some(tick);
-                break;
-            }
-        }
-        assert!(first.is_some_and(|t| t > 30));
-        assert!((target.1[0] - pos[0]).abs() <= ATTACK_REACH);
-        assert!(pos[0] < 10.0 - CLOSE_IN + 1e-9);
-    }

    #[test]
    fn percentiles_use_nearest_rank() {
@@ -1,15 +0,0 @@
-[package]
-name = "horizon-chat-filter"
-version = "0.1.0"
-edition.workspace = true
-license.workspace = true
-rust-version = "1.88"
-description = "The dedicated server's chat filter: its [chat_filter] settings, the slur list's matcher and the mutes, with no game state (docs/chat-filter.md)"
-
-[dependencies]
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
-toml = "1.1"
-
-[lints]
-workspace = true
@@ -1,63 +0,0 @@
-# Horizon's chat filter: the hate slurs a server refuses in chat, private messages, /say, /me, team
-# messages, signs, anvil names and book titles (docs/chat-filter.md). This is a moderation list: the
-# words are written here only so the filter can recognise them, because players spammed them on the
-# official server (2026-10-31). Add a word when players find a way around the list; keep insults that
-# aren't slurs out of it (moderators handle those).
-#
-# One entry a line, matched after normalising the text: lower case, accents and look-alike letters
-# (Cyrillic, Greek, full-width, small capitals...), leetspeak (1 i, 3 e, 4 a, 0 o, @ a, $ s, 9 g),
-# separators between letters (n.i.g, n_i_g) and repeated letters. A doubled letter in an entry must be
-# doubled in the text: "niger", the river and the country, isn't "nigger".
-#   word    matches inside a longer word too
-#   =word   only as a whole word ("spic", not "suspicious")
-#   ~word   also when it's spread over several words ("nig ger", "n i g g e r")
-#   !word   never a match: a word that contains an entry ("snigger"); !word* any word starting so
-
-~nigger
-~nigga
-nigguh
-niggah
-niqqa
-niqqer
-nlgger
-nlgga
-kneegrow
-=nig
-=nigs
-=niglet
-=niglets
-=nibba
-=nibbas
-=nibber
-=nibbers
-jigaboo
-porchmonkey
-=coon
-=coons
-~faggot
-=fag
-=fags
-=faggy
-=fagot
-=fagots
-=tranny
-=trannies
-=kike
-=kikes
-=chink
-=chinks
-=gook
-=gooks
-=spic
-=spics
-wetback
-=beaner
-=beaners
-raghead
-towelhead
-zipperhead
-=paki
-=pakis
-
-!snigger*
-!niggard*
@@ -1,550 +0,0 @@
-//! The dedicated server's chat filter (docs/chat-filter.md), without the game: `server.toml`'s
-//! `[chat_filter]`, the matcher for the slur list (`data/slurs.txt`, or the owner's `words_file`), and
-//! the escalation (a refused message, then a mute, then a temporary ban), with the mutes kept in a file
-//! so that they outlive a restart. The server's hub (`horizon_client::lan`) asks it before it relays a
-//! player's text and carries out what it decides.
-
-use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
-use std::path::{Path, PathBuf};
-
-mod normalise;
-
-pub use normalise::{Run, Text};
-
-/// The list built into the game, used when `words_file` is empty.
-pub const DEFAULT_WORDS: &str = include_str!("../data/slurs.txt");
-
-/// The mutes, beside server.properties.
-pub const MUTES_FILE: &str = "chat-filter-mutes.json";
-
-/// `server.toml`'s `[chat_filter]`: on by default.
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
-#[serde(default, deny_unknown_fields)]
-pub struct Config {
-    pub enabled: bool,
-    /// The hit, counted within `window_minutes`, that mutes the player; 0: never.
-    pub mute_after: u32,
-    /// The hit that bans the player for `tempban_hours`; 0: never.
-    pub tempban_after: u32,
-    /// How long a hit counts towards the next ones (the time spent muted doesn't count).
-    pub window_minutes: u32,
-    pub mute_minutes: u32,
-    pub tempban_hours: u32,
-    /// The slur list, relative to the server's folder; empty: the list built into the game.
-    pub words_file: String,
-    /// Every refused text with the player and what followed, relative to the server's folder.
-    pub log: String,
-}
-
-impl Default for Config {
-    fn default() -> Self {
-        Self {
-            enabled: true,
-            mute_after: 2,
-            tempban_after: 3,
-            window_minutes: 10,
-            mute_minutes: 10,
-            tempban_hours: 24,
-            words_file: String::new(),
-            log: "logs/chat-filter.log".into(),
-        }
-    }
-}
-
-impl Config {
-    /// The `[chat_filter]` section of a whole `server.toml`; the default without it.
-    pub fn from_server_toml(text: &str) -> Result<Self, String> {
-        #[derive(Deserialize)]
-        struct File {
-            #[serde(default)]
-            chat_filter: Config,
-        }
-        // Other sections are the supervisor's to check: only this one is read here.
-        let mut table: toml::Table = toml::from_str(text).map_err(|e| e.to_string())?;
-        let mut only = toml::Table::new();
-        if let Some(section) = table.remove("chat_filter") {
-            only.insert("chat_filter".into(), section);
-        }
-        let file: File = only
-            .try_into()
-            .map_err(|e: toml::de::Error| format!("[chat_filter]: {e}"))?;
-        file.chat_filter.check()?;
-        Ok(file.chat_filter)
-    }
-
-    pub fn check(&self) -> Result<(), String> {
-        if self.window_minutes == 0 {
-            return Err("chat_filter.window_minutes must be 1 or more".into());
-        }
-        Ok(())
-    }
-}
-
-/// How an entry of the list matches.
-#[derive(Clone, Copy, Debug, PartialEq)]
-enum Kind {
-    /// Inside a longer word too.
-    Embedded,
-    /// Only as a whole word.
-    Whole,
-    /// Inside a word, or spread over several words from the start of one.
-    Spread,
-}
-
-#[derive(Debug)]
-struct Entry {
-    runs: Vec<Run>,
-    kind: Kind,
-}
-
-/// The slur list, compiled: each entry's letters as runs, indexed by first letter.
-#[derive(Debug)]
-pub struct Filter {
-    entries: Vec<Entry>,
-    by_first: [Vec<u16>; 27],
-    /// Words never matched: exact (`false`) or as a prefix (`true`).
-    allowed: Vec<(Vec<Run>, bool)>,
-}
-
-impl Filter {
-    /// Compiles a list in `data/slurs.txt`'s format.
-    pub fn new(list: &str) -> Self {
-        let mut f = Filter {
-            entries: Vec::new(),
-            by_first: Default::default(),
-            allowed: Vec::new(),
-        };
-        for line in list.lines() {
-            let line = line.trim();
-            if line.is_empty() || line.starts_with('#') {
-                continue;
-            }
-            if let Some(word) = line.strip_prefix('!') {
-                let (word, prefix) = match word.strip_suffix('*') {
-                    Some(w) => (w, true),
-                    None => (word, false),
-                };
-                // An allow entry with no letters would allow every word (an empty prefix).
-                let runs = normalise::word(word);
-                if !runs.is_empty() {
-                    f.allowed.push((runs, prefix));
-                }
-                continue;
-            }
-            let (kind, word) = match line.as_bytes()[0] {
-                b'=' => (Kind::Whole, &line[1..]),
-                b'~' => (Kind::Spread, &line[1..]),
-                _ => (Kind::Embedded, line),
-            };
-            let runs = normalise::word(word);
-            let Some(first) = runs.first() else {
-                continue;
-            };
-            f.by_first[usize::from(first.letter)].push(f.entries.len() as u16);
-            f.entries.push(Entry { runs, kind });
-        }
-        f
-    }
-
-    /// The built-in list.
-    pub fn default_list() -> Self {
-        Self::new(DEFAULT_WORDS)
-    }
-
-    pub fn len(&self) -> usize {
-        self.entries.len()
-    }
-
-    pub fn is_empty(&self) -> bool {
-        self.entries.is_empty()
-    }
-
-    /// Whether `text` holds a slur of the list.
-    pub fn matches(&self, text: &str) -> bool {
-        let t = Text::new(text);
-        let runs = &t.runs;
-        for &(start, end) in t.words.iter().chain(&t.spaced) {
-            let word = &runs[start..end];
-            if self.is_allowed(word) {
-                continue;
-            }
-            for at in 0..word.len() {
-                for &e in &self.by_first[usize::from(word[at].letter)] {
-                    let e = &self.entries[usize::from(e)];
-                    let whole = e.kind == Kind::Whole;
-                    if (!whole || at == 0) && fits(&e.runs, &word[at..], whole) {
-                        return true;
-                    }
-                }
-            }
-        }
-        // Spread entries over the whole text, from the start of a word, across at least two.
-        for (w, &at) in t.joined_at.iter().enumerate() {
-            for &e in &self.by_first[usize::from(t.joined[at].letter)] {
-                let e = &self.entries[usize::from(e)];
-                if e.kind == Kind::Spread
-                    && fits(&e.runs, &t.joined[at..], false)
-                    && t.spans_words(w, e.runs.len())
-                {
-                    return true;
-                }
-            }
-        }
-        false
-    }
-
-    fn is_allowed(&self, word: &[Run]) -> bool {
-        self.allowed.iter().any(|(a, prefix)| {
-            if *prefix {
-                // A prefix: its last run may be part of a longer one.
-                word.len() >= a.len() && fits(a, word, false)
-            } else {
-                fits(a, word, true)
-            }
-        })
-    }
-}
-
-/// Whether `entry`'s runs start `runs` (are all of it with `whole`): the same letters, each at least
-/// as many times as the entry has it.
-fn fits(entry: &[Run], runs: &[Run], whole: bool) -> bool {
-    if runs.len() < entry.len() || (whole && runs.len() != entry.len()) {
-        return false;
-    }
-    entry
-        .iter()
-        .zip(runs)
-        .all(|(e, r)| e.letter == r.letter && r.count >= e.count)
-}
-
-/// What a hit leads to.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum Action {
-    /// The text is refused, nothing more.
-    Refused,
-    /// Refused, and the player can't chat until then (epoch milliseconds).
-    Muted { until: i64 },
-    /// Refused, and the player is banned until then.
-    Banned { until: i64 },
-}
-
-impl Action {
-    pub fn name(self) -> &'static str {
-        match self {
-            Action::Refused => "refused",
-            Action::Muted { .. } => "muted",
-            Action::Banned { .. } => "banned",
-        }
-    }
-}
-
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
-pub struct Mute {
-    pub uuid: String,
-    pub name: String,
-    /// Epoch milliseconds; `None`: until `/unmute`.
-    pub until: Option<i64>,
-    /// The operator who muted them (`/mute`, `/tempmute`); `None`: the filter.
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub by: Option<String>,
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub reason: Option<String>,
-}
-
-impl Mute {
-    pub fn active(&self, now: i64) -> bool {
-        self.until.is_none_or(|until| until > now)
-    }
-}
-
-#[derive(Default, Serialize, Deserialize)]
-struct MutesFile {
-    mutes: Vec<Mute>,
-}
-
-/// One player's hits: how many, and when the last one stops counting.
-#[derive(Clone, Copy, Debug)]
-struct Strikes {
-    count: u32,
-    counts_until: i64,
-}
-
-/// The filter, the players' hits and the mutes.
-pub struct Guard {
-    pub config: Config,
-    pub filter: Filter,
-    strikes: HashMap<u128, Strikes>,
-    mutes: HashMap<u128, Mute>,
-    /// Where the mutes are kept; `None` keeps them in memory only (tests).
-    file: Option<PathBuf>,
-}
-
-const MINUTE: i64 = 60_000;
-
-impl Guard {
-    pub fn new(config: Config, filter: Filter, file: Option<PathBuf>) -> Self {
-        let mut mutes = HashMap::new();
-        if let Some(text) = file.as_ref().and_then(|f| std::fs::read_to_string(f).ok())
-            && let Ok(saved) = serde_json::from_str::<MutesFile>(&text)
-        {
-            for m in saved.mutes {
-                if let Some(uuid) = parse_uuid(&m.uuid) {
-                    mutes.insert(uuid, m);
-                }
-            }
-        }
-        Self {
-            config,
-            filter,
-            strikes: HashMap::new(),
-            mutes,
-            file,
-        }
-    }
-
-    /// The server's guard: `words_file` or the built-in list, the mutes in `dir`. An unreadable
-    /// `words_file` falls back to the built-in list, with why.
-    pub fn load(config: Config, dir: &Path) -> (Self, Option<String>) {
-        let mut problem = None;
-        let filter = if config.words_file.is_empty() {
-            Filter::default_list()
-        } else {
-            match std::fs::read_to_string(dir.join(&config.words_file)) {
-                Ok(text) => Filter::new(&text),
-                Err(e) => {
-                    problem = Some(format!(
-                        "chat_filter.words_file {}: {e}; using the built-in list",
-                        config.words_file
-                    ));
-                    Filter::default_list()
-                }
-            }
-        };
-        (
-            Self::new(config, filter, Some(dir.join(MUTES_FILE))),
-            problem,
-        )
-    }
-
-    /// The player's mute, if they are muted at `now`.
-    pub fn muted(&self, uuid: u128, now: i64) -> Option<&Mute> {
-        self.mutes.get(&uuid).filter(|m| m.active(now))
-    }
-
-    /// The mutes in force at `now`, by name.
-    pub fn mutes(&self, now: i64) -> Vec<&Mute> {
-        let mut mutes: Vec<&Mute> = self.mutes.values().filter(|m| m.active(now)).collect();
-        mutes.sort_by(|a, b| a.name.cmp(&b.name));
-        mutes
-    }
-
-    /// An operator's `/mute` (`until` `None`) or `/tempmute`: replaces the player's mute.
-    pub fn mute(
-        &mut self,
-        uuid: u128,
-        name: &str,
-        until: Option<i64>,
-        by: &str,
-        reason: Option<String>,
-    ) {
-        self.mutes.insert(
-            uuid,
-            Mute {
-                uuid: uuid_string(uuid),
-                name: name.to_owned(),
-                until,
-                by: Some(by.to_owned()),
-                reason,
-            },
-        );
-        self.save();
-    }
-
-    /// A hit by the player at `now`: the hit's number in the window, and what it leads to.
-    pub fn strike(&mut self, uuid: u128, name: &str, now: i64) -> (u32, Action) {
-        let c = &self.config;
-        let window = i64::from(c.window_minutes) * MINUTE;
-        let s = self.strikes.entry(uuid).or_insert(Strikes {
-            count: 0,
-            counts_until: 0,
-        });
-        if now > s.counts_until {
-            s.count = 0;
-        }
-        s.count += 1;
-        s.counts_until = now + window;
-        let count = s.count;
-        let action = if c.tempban_after > 0 && count >= c.tempban_after {
-            self.strikes.remove(&uuid);
-            Action::Banned {
-                until: now + i64::from(c.tempban_hours) * 60 * MINUTE,
-            }
-        } else if c.mute_after > 0 && count >= c.mute_after {
-            let until = now + i64::from(c.mute_minutes) * MINUTE;
-            // The window starts again when the mute ends.
-            s.counts_until = until + window;
-            // An operator's longer mute stays.
-            if !self
-                .mutes
-                .get(&uuid)
-                .is_some_and(|m| m.until.is_none_or(|u| u >= until))
-            {
-                self.mutes.insert(
-                    uuid,
-                    Mute {
-                        uuid: uuid_string(uuid),
-                        name: name.to_owned(),
-                        until: Some(until),
-                        by: None,
-                        reason: None,
-                    },
-                );
-                self.save();
-            }
-            Action::Muted { until }
-        } else {
-            Action::Refused
-        };
-        (count, action)
-    }
-
-    /// Lifts a player's mute (and forgets their hits), by name; the name as muted, if they were.
-    pub fn unmute(&mut self, name: &str) -> Option<String> {
-        let uuid = *self
-            .mutes
-            .iter()
-            .find(|(_, m)| m.name.eq_ignore_ascii_case(name))?
-            .0;
-        let mute = self.mutes.remove(&uuid)?;
-        self.strikes.remove(&uuid);
-        self.save();
-        Some(mute.name)
-    }
-
-    fn save(&mut self) {
-        let Some(file) = &self.file else {
-            return;
-        };
-        let now = now_millis();
-        self.mutes.retain(|_, m| m.active(now));
-        let mut mutes: Vec<Mute> = self.mutes.values().cloned().collect();
-        mutes.sort_by(|a, b| a.name.cmp(&b.name));
-        if let Ok(text) = serde_json::to_string_pretty(&MutesFile { mutes }) {
-            let tmp = file.with_extension("json.tmp");
-            if std::fs::write(&tmp, text).is_ok() {
-                let _ = std::fs::rename(&tmp, file);
-            }
-        }
-    }
-}
-
-/// One line of `logs/chat-filter.log`, without its newline.
-pub fn log_line(
-    now: i64,
-    name: &str,
-    uuid: u128,
-    place: &str,
-    count: u32,
-    action: Action,
-    text: &str,
-) -> String {
-    let text: String = text
-        .chars()
-        .map(|c| if c == '\n' { ' ' } else { c })
-        .collect();
-    format!(
-        "{} {name} {} {place} hit {count} {}: {text}",
-        utc(now),
-        uuid_string(uuid),
-        action.name()
-    )
-}
-
-/// Appends a line to the log at `path` (its folder made if needed).
-pub fn append_log(path: &Path, line: &str) -> std::io::Result<()> {
-    use std::io::Write;
-    if let Some(dir) = path.parent() {
-        std::fs::create_dir_all(dir)?;
-    }
-    let mut f = std::fs::OpenOptions::new()
-        .create(true)
-        .append(true)
-        .open(path)?;
-    writeln!(f, "{line}")
-}
-
-/// `/tempmute`'s duration in milliseconds: a positive whole number and a unit, `s`, `m`, `h`, `d` or
-/// `w` (`10m`, `2h`, `1d`).
-pub fn parse_duration(text: &str) -> Option<i64> {
-    let unit = match text.chars().last()? {
-        's' => 1_000,
-        'm' => MINUTE,
-        'h' => 60 * MINUTE,
-        'd' => 24 * 60 * MINUTE,
-        'w' => 7 * 24 * 60 * MINUTE,
-        _ => return None,
-    };
-    let count: i64 = text[..text.len() - 1].parse().ok()?;
-    (count > 0).then(|| count.checked_mul(unit)).flatten()
-}
-
-/// `millis` for players, rounded up: minutes up to an hour, hours up to two days, then days.
-pub fn duration_text(millis: i64) -> String {
-    let up = |unit: i64| (millis + unit - 1) / unit;
-    let (count, unit) = if millis <= 60 * MINUTE {
-        (up(MINUTE), "minute")
-    } else if millis <= 48 * 60 * MINUTE {
-        (up(60 * MINUTE), "hour")
-    } else {
-        (up(24 * 60 * MINUTE), "day")
-    };
-    format!("{count} {unit}{}", if count == 1 { "" } else { "s" })
-}
-
-pub fn now_millis() -> i64 {
-    std::time::SystemTime::now()
-        .duration_since(std::time::UNIX_EPOCH)
-        .map_or(0, |d| d.as_millis() as i64)
-}
-
-/// `YYYY-MM-DDTHH:MM:SSZ` for epoch milliseconds.
-pub fn utc(millis: i64) -> String {
-    let secs = millis.div_euclid(1000);
-    let (days, rest) = (secs.div_euclid(86_400), secs.rem_euclid(86_400));
-    // Howard Hinnant's civil_from_days.
-    let z = days + 719_468;
-    let era = z.div_euclid(146_097);
-    let doe = z.rem_euclid(146_097);
-    let yoe = (doe - doe / 1460 + doe / 36_524 - doe / 146_096) / 365;
-    let doy = doe - (365 * yoe + yoe / 4 - yoe / 100);
-    let mp = (5 * doy + 2) / 153;
-    let day = doy - (153 * mp + 2) / 5 + 1;
-    let month = if mp < 10 { mp + 3 } else { mp - 9 };
-    let year = yoe + era * 400 + i64::from(month <= 2);
-    format!(
-        "{year:04}-{month:02}-{day:02}T{:02}:{:02}:{:02}Z",
-        rest / 3600,
-        rest / 60 % 60,
-        rest % 60
-    )
-}
-
-fn uuid_string(u: u128) -> String {
-    let h = format!("{u:032x}");
-    format!(
-        "{}-{}-{}-{}-{}",
-        &h[..8],
-        &h[8..12],
-        &h[12..16],
-        &h[16..20],
-        &h[20..]
-    )
-}
-
-fn parse_uuid(s: &str) -> Option<u128> {
-    u128::from_str_radix(&s.replace('-', ""), 16).ok()
-}
-
-#[cfg(test)]
-mod tests;
@@ -1,255 +0,0 @@
-//! A text as the filter sees it: words of letters `a`..`z`, each letter with how many times it repeats.
-//! Case, accents, look-alike letters (Cyrillic, Greek, full-width, small capitals, styled mathematical
-//! letters, circled and squared letters), leetspeak and invisible characters are folded away;
-//! separators inside a word are dropped (`n.i.g` is `nig`), and whitespace ends a word.
-
-/// The letter code of anything that is a letter but none of `a`..`z`: it never matches.
-const OTHER: u8 = 26;
-
-/// One letter and how many times it repeats (`gg` is `g` twice).
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub struct Run {
-    /// 0..=25 for `a`..`z`, 26 for any other letter.
-    pub letter: u8,
-    pub count: u8,
-    /// Every one of its characters was punctuation read as a letter (`!` as `i`, `@` as `a`).
-    pub weak: bool,
-}
-
-/// A whole message, normalised.
-#[derive(Debug, Default)]
-pub struct Text {
-    pub runs: Vec<Run>,
-    /// Each word's runs, `runs[start..end]`.
-    pub words: Vec<(usize, usize)>,
-    /// More ranges of `runs` to match as words: letters spaced out (`n i g g a`), joined, and words
-    /// without the punctuation they end with (`fag!`).
-    pub spaced: Vec<(usize, usize)>,
-    /// Every word one after the other, a letter that ends one and starts the next merged.
-    pub joined: Vec<Run>,
-    /// Where each word starts in `joined`.
-    pub joined_at: Vec<usize>,
-    /// The last word each run of `joined` belongs to.
-    joined_last: Vec<usize>,
-}
-
-enum Fold {
-    Letter(u8, bool),
-    Separator,
-    Space,
-    Skip,
-}
-
-impl Text {
-    pub fn new(text: &str) -> Self {
-        let mut t = Text::default();
-        let mut start = 0;
-        for c in text.chars() {
-            match fold(c) {
-                Fold::Letter(letter, weak) => {
-                    let in_word = t.runs.len() > start;
-                    match t.runs.last_mut() {
-                        Some(last) if in_word && last.letter == letter => {
-                            last.count = last.count.saturating_add(1);
-                            last.weak &= weak;
-                        }
-                        _ => t.runs.push(Run {
-                            letter,
-                            count: 1,
-                            weak,
-                        }),
-                    }
-                }
-                Fold::Space => {
-                    t.end_word(start);
-                    start = t.runs.len();
-                }
-                Fold::Separator | Fold::Skip => {}
-            }
-        }
-        t.end_word(start);
-        t.add_spaced();
-        t.join();
-        t
-    }
-
-    fn end_word(&mut self, start: usize) {
-        if self.runs.len() > start {
-            self.words.push((start, self.runs.len()));
-        }
-    }
-
-    /// Spaced-out letters and words without their trailing punctuation, as extra words (their runs
-    /// copied after the real words').
-    fn add_spaced(&mut self) {
-        let words = self.words.len();
-        let mut w = 0;
-        while w < words {
-            let mut end = w;
-            while end < words && self.words[end].1 - self.words[end].0 == 1 {
-                end += 1;
-            }
-            if end - w >= 2 {
-                let first = self.runs.len();
-                for k in w..end {
-                    let run = self.runs[self.words[k].0];
-                    let in_word = self.runs.len() > first;
-                    match self.runs.last_mut() {
-                        Some(last) if in_word && last.letter == run.letter => {
-                            last.count = last.count.saturating_add(run.count);
-                        }
-                        _ => self.runs.push(run),
-                    }
-                }
-                self.spaced.push((first, self.runs.len()));
-                w = end;
-            } else {
-                w += 1;
-            }
-        }
-        for k in 0..words {
-            let (start, mut end) = self.words[k];
-            while end > start + 1 && self.runs[end - 1].weak {
-                end -= 1;
-            }
-            if end < self.words[k].1 {
-                self.spaced.push((start, end));
-            }
-        }
-    }
-
-    fn join(&mut self) {
-        for (w, &(start, end)) in self.words.iter().enumerate() {
-            let mut first = true;
-            for run in &self.runs[start..end] {
-                match self.joined.last_mut() {
-                    Some(last) if first && last.letter == run.letter => {
-                        last.count = last.count.saturating_add(run.count);
-                        self.joined_at.push(self.joined.len() - 1);
-                        *self.joined_last.last_mut().expect("beside joined") = w;
-                    }
-                    _ => {
-                        if first {
-                            self.joined_at.push(self.joined.len());
-                        }
-                        self.joined.push(*run);
-                        self.joined_last.push(w);
-                    }
-                }
-                first = false;
-            }
-        }
-    }
-
-    /// Whether `len` runs of `joined` from word `w`'s start reach into a later word.
-    pub fn spans_words(&self, w: usize, len: usize) -> bool {
-        self.joined_last
-            .get(self.joined_at[w] + len - 1)
-            .is_some_and(|&last| last > w)
-    }
-}
-
-/// An entry of the list, normalised the same way (one word, whitespace ignored).
-pub fn word(text: &str) -> Vec<Run> {
-    let t = Text::new(&text.replace(char::is_whitespace, ""));
-    t.words
-        .first()
-        .map_or_else(Vec::new, |&(s, e)| t.runs[s..e].to_vec())
-}
-
-fn letter(c: char) -> Fold {
-    Fold::Letter(c as u8 - b'a', false)
-}
-
-fn fold(c: char) -> Fold {
-    if c.is_ascii_alphabetic() {
-        return letter(c.to_ascii_lowercase());
-    }
-    if c.is_ascii() {
-        return match c {
-            '0' => letter('o'),
-            '1' => letter('i'),
-            '3' => letter('e'),
-            '4' => letter('a'),
-            '5' => letter('s'),
-            '6' | '9' => letter('g'),
-            '7' => letter('t'),
-            '8' => letter('b'),
-            '!' | '|' => Fold::Letter(b'i' - b'a', true),
-            '@' => Fold::Letter(0, true),
-            '$' => Fold::Letter(b's' - b'a', true),
-            c if c.is_ascii_whitespace() => Fold::Space,
-            _ => Fold::Separator,
-        };
-    }
-    let u = c as u32;
-    let from = |base: u32, span: u32| char::from(b'a' + ((u - base) % span) as u8);
-    let mapped = match u {
-        // Zero-width characters, soft hyphen, combining marks, variation selectors.
-        0xAD | 0x34F | 0x200B..=0x200F | 0x2060..=0x2064 | 0xFEFF | 0x180E => return Fold::Skip,
-        0x300..=0x36F
-        | 0x1AB0..=0x1AFF
-        | 0x1DC0..=0x1DFF
-        | 0x20D0..=0x20FF
-        | 0xFE00..=0xFE0F
-        | 0xFE20..=0xFE2F
-        | 0xE0100..=0xE01EF => return Fold::Skip,
-        // Full-width Latin and digits.
-        0xFF21..=0xFF3A => from(0xFF21, 26),
-        0xFF41..=0xFF5A => from(0xFF41, 26),
-        0xFF10..=0xFF19 => return fold(char::from(b'0' + (u - 0xFF10) as u8)),
-        // Mathematical alphanumerics: 52 letters a style, then digits.
-        0x1D400..=0x1D6A3 => from(0x1D400, 26),
-        0x1D7CE..=0x1D7FF => return fold(char::from(b'0' + ((u - 0x1D7CE) % 10) as u8)),
-        // Circled, parenthesised, squared and negative letters, regional indicators.
-        0x24B6..=0x24CF => from(0x24B6, 26),
-        0x24D0..=0x24E9 => from(0x24D0, 26),
-        0x249C..=0x24B5 => from(0x249C, 26),
-        0x1F130..=0x1F149 => from(0x1F130, 26),
-        0x1F150..=0x1F169 => from(0x1F150, 26),
-        0x1F170..=0x1F189 => from(0x1F170, 26),
-        0x1F1E6..=0x1F1FF => from(0x1F1E6, 26),
-        _ => {
-            if c.is_whitespace() {
-                return Fold::Space;
-            }
-            let lower = c.to_lowercase().next().unwrap_or(c);
-            match LOOK_ALIKES.iter().find(|(_, chars)| chars.contains(lower)) {
-                Some((base, _)) => *base,
-                None if c.is_alphabetic() => return Fold::Letter(OTHER, false),
-                None => return Fold::Separator,
-            }
-        }
-    };
-    letter(mapped)
-}
-
-/// Letters with accents and letters that look like a Latin one, by the letter they read as (lower case).
-const LOOK_ALIKES: &[(char, &str)] = &[
-    ('a', "àáâãäåāăąǎǟǡǻȁȃȧạảấầẩẫậắằẳẵặⱥɐаαᴀᵃª"),
-    ('b', "ƀɓḃḅḇвьъβʙᵇ"),
-    ('c', "çćĉċčƈḉȼсϲᴄᶜ"),
-    ('d', "ďđɗḋḍḏḑḓԁδᴅᵈ"),
-    ('e', "èéêëēĕėęěȅȇȩẹẻẽếềểễệḕḗḙḛḝɇеёєεᴇᵉ€"),
-    ('f', "ƒḟꜰᶠ"),
-    ('g', "ĝğġģǥǧǵɠḡɡɢᵍ"),
-    ('h', "ĥħȟḣḥḧḩḫẖнһʜʰ"),
-    ('i', "ìíîïĩīĭįıǐȉȋḭḯỉịіїιɪⁱ¡ӏ"),
-    ('j', "ĵǰјᴊʲ"),
-    ('k', "ķĸǩḱḳḵкκᴋᵏ"),
-    ('l', "ĺļľŀłḷḹḻḽʟˡ"),
-    ('m', "мᴍᵐ"),
-    ('n', "ñńņňŉŋǹṅṇṉṋиипηπɴⁿ"),
-    ('o', "òóôõöøōŏőơǒǫǭǿȍȏȫȭȯȱọỏốồổỗộớờởỡợоοσᴏᵒº"),
-    ('p', "ṕṗрρᴘᵖ"),
-    ('q', "ԛ"),
-    ('r', "ŕŗřȑȓṙṛṝṟгʀʳ"),
-    ('s', "śŝşšșṡṣṥṧṩѕꜱˢß"),
-    ('t', "ţťŧțṫṭṯṱẗтτᴛᵗ"),
-    ('u', "ùúûüũūŭůűųưǔǖǘǚǜȕȗụủứừửữựυᴜᵘ"),
-    ('v', "νᴠᵛ"),
-    ('w', "ŵẁẃẅẇẉẘԝωᴡʷ"),
-    ('x', "хχˣ"),
-    ('y', "ýÿŷȳẏẙỳỵỷỹуүγʏʸ"),
-    ('z', "źżžƶẑẓẕᴢᶻ"),
-];
@@ -1,329 +0,0 @@
-// The test texts spell the slurs the filter must refuse: that is what they test.
-use super::*;
-
-fn filter() -> Filter {
-    Filter::default_list()
-}
-
-#[test]
-fn the_list_compiles() {
-    let f = filter();
-    assert!(f.len() > 30, "{} entries", f.len());
-    assert_eq!(f.allowed.len(), 2);
-}
-
-#[test]
-fn normalising_catches_the_usual_disguises() {
-    let f = filter();
-    for text in [
-        "nigger",
-        "NIGGER",
-        "shut up nigga",
-        "Niggers",
-        "n1gg3r",
-        "ni99a",
-        "N!GGA",
-        "nigg@",
-        "n.i.g.g.e.r",
-        "n_i_g_g_a",
-        "n i g g e r",
-        "n i gg a",
-        "nig ger",
-        "nig  gaaa",
-        "niiiiggggggerrrrr",
-        "ñíggér",
-        "ｎｉｇｇｅｒ",
-        "Niggeг",         // Cyrillic ghe for r
-        "nіgger",         // Cyrillic i
-        "nigg\u{0435}r",  // Cyrillic e
-        "n\u{200B}igger", // a zero-width space
-        "n\u{0301}igger", // a combining accent
-        "𝐧𝐢𝐠𝐠𝐞𝐫",
-        "ⓝⓘⓖⓖⓐ",
-        "ɴɪɢɢᴀ",
-        "hi nig",
-        "f a g",
-        "fag!",
-        "you $pic",
-        "FAGGOTINO-CHAN",
-        "sandnigger",
-        "lol kike",
-    ] {
-        assert!(f.matches(text), "{text:?} should be refused");
-    }
-}
-
-#[test]
-fn ordinary_words_pass() {
-    let f = filter();
-    for text in [
-        "hello",
-        "Niger",
-        "I live in Niger",
-        "Nigeria and the Niger river",
-        "nigerian food",
-        "proud2benigerian",
-        "don't snigger",
-        "sniggering at that",
-        "a niggardly offer",
-        "knight",
-        "qKnights",
-        "its still night",
-        "anyone able to boot the latest nightly version?",
-        "i hate nighbours",
-        "can someune give mi night vision",
-        "suspicious stew",
-        "spicy food",
-        "a raccoon in a cocoon",
-        "Scunthorpe",
-        "bigger trigger digger",
-        "gg",
-        "gg ez",
-        "mini gg all",
-        "kniga",
-        "shenanigans",
-        "dignity and signing",
-        "Pakistan",
-        "chinking glasses",
-        "the trannys? no: transmission",
-        "1nicerOli",
-        "ask me evernig",
-        "冰淇淋",
-        "привет",
-        "",
-        "!!!",
-    ] {
-        assert!(!f.matches(text), "{text:?} should pass");
-    }
-}
-
-#[test]
-fn a_custom_list_has_the_same_syntax() {
-    let f = Filter::new("# comment\n=bad\n~worse\nmeh\n!mehish*\n");
-    assert!(f.matches("so bad"));
-    assert!(!f.matches("badly"));
-    assert!(f.matches("wor se"));
-    assert!(f.matches("xxmehxx"));
-    assert!(!f.matches("mehishness"));
-    assert!(!f.matches("me h"));
-}
-
-fn guard(config: Config) -> Guard {
-    Guard::new(config, filter(), None)
-}
-
-const NOW: i64 = 1_793_469_939_000;
-const MIN: i64 = 60_000;
-
-#[test]
-fn the_second_hit_mutes_and_the_third_bans() {
-    let mut g = guard(Config::default());
-    let id = 7;
-    assert_eq!(g.strike(id, "Ann", NOW), (1, Action::Refused));
-    assert_eq!(g.muted(id, NOW), None);
-    let until = NOW + 3 * MIN + 10 * MIN;
-    assert_eq!(
-        g.strike(id, "Ann", NOW + 3 * MIN),
-        (2, Action::Muted { until })
-    );
-    assert_eq!(g.muted(id, NOW + 4 * MIN).unwrap().until, Some(until));
-    assert_eq!(g.muted(id, until), None);
-    // The time spent muted doesn't count: 8 minutes after the mute ended is still within the window.
-    assert_eq!(
-        g.strike(id, "Ann", until + 8 * MIN),
-        (
-            3,
-            Action::Banned {
-                until: until + 8 * MIN + 24 * 60 * MIN
-            }
-        )
-    );
-    // Then it starts again.
-    assert_eq!(g.strike(id, "Ann", until + 9 * MIN), (1, Action::Refused));
-}
-
-#[test]
-fn hits_far_apart_dont_add_up() {
-    let mut g = guard(Config::default());
-    assert_eq!(g.strike(1, "Bo", NOW), (1, Action::Refused));
-    assert_eq!(g.strike(1, "Bo", NOW + 11 * MIN), (1, Action::Refused));
-    // Players are counted apart.
-    assert_eq!(g.strike(2, "Cy", NOW + 12 * MIN), (1, Action::Refused));
-}
-
-#[test]
-fn thresholds_are_configurable() {
-    let mut g = guard(Config {
-        mute_after: 0,
-        tempban_after: 2,
-        tempban_hours: 1,
-        ..Config::default()
-    });
-    assert_eq!(g.strike(1, "Bo", NOW), (1, Action::Refused));
-    assert_eq!(
-        g.strike(1, "Bo", NOW + MIN),
-        (
-            2,
-            Action::Banned {
-                until: NOW + MIN + 60 * MIN
-            }
-        )
-    );
-    let mut off = guard(Config {
-        mute_after: 0,
-        tempban_after: 0,
-        ..Config::default()
-    });
-    for k in 1..5 {
-        assert_eq!(off.strike(1, "Bo", NOW + k), (k as u32, Action::Refused));
-    }
-}
-
-#[test]
-fn mutes_survive_a_restart_and_unmute_lifts_them() {
-    let dir = std::env::temp_dir().join(format!("chat-filter-test-{}", std::process::id()));
-    std::fs::create_dir_all(&dir).unwrap();
-    let now = now_millis();
-    let (mut g, problem) = Guard::load(Config::default(), &dir);
-    assert_eq!(problem, None);
-    g.strike(5, "Dee", now);
-    let (_, action) = g.strike(5, "Dee", now);
-    assert!(matches!(action, Action::Muted { .. }));
-    let (mut again, _) = Guard::load(Config::default(), &dir);
-    assert!(again.muted(5, now).is_some());
-    assert_eq!(again.unmute("dee").as_deref(), Some("Dee"));
-    assert_eq!(again.unmute("dee"), None);
-    assert_eq!(again.muted(5, now), None);
-    // An operator's mutes are kept too, with who and why.
-    again.mute(6, "Eve", None, "Op", Some("spam".into()));
-    again.mute(7, "Fay", Some(now + MIN), "Op", None);
-    let (reloaded, _) = Guard::load(Config::default(), &dir);
-    assert_eq!(reloaded.muted(5, now), None);
-    let names: Vec<_> = reloaded
-        .mutes(now)
-        .iter()
-        .map(|m| m.name.as_str())
-        .collect();
-    assert_eq!(names, ["Eve", "Fay"]);
-    let eve = reloaded.muted(6, now).unwrap();
-    assert_eq!(
-        (eve.until, eve.by.as_deref(), eve.reason.as_deref()),
-        (None, Some("Op"), Some("spam"))
-    );
-    assert_eq!(reloaded.mutes(now + MIN).len(), 1);
-    std::fs::remove_dir_all(&dir).unwrap();
-}
-
-#[test]
-fn a_mute_file_from_before_manual_mutes_still_loads() {
-    let saved: MutesFile = serde_json::from_str(
-        r#"{"mutes":[{"uuid":"00000000-0000-0000-0000-000000000005","name":"Dee","until":5}]}"#,
-    )
-    .unwrap();
-    assert_eq!(saved.mutes[0].until, Some(5));
-    assert_eq!(saved.mutes[0].by, None);
-}
-
-#[test]
-fn the_filter_never_shortens_an_operators_mute() {
-    let mut g = guard(Config::default());
-    g.mute(1, "Bo", None, "Op", None);
-    g.strike(1, "Bo", NOW);
-    g.strike(1, "Bo", NOW + MIN);
-    assert_eq!(
-        g.muted(1, NOW + 60 * MIN).unwrap().by.as_deref(),
-        Some("Op")
-    );
-    // A shorter one is replaced by the filter's.
-    g.mute(2, "Cy", Some(NOW + MIN), "Op", None);
-    g.strike(2, "Cy", NOW);
-    g.strike(2, "Cy", NOW);
-    assert_eq!(g.muted(2, NOW).unwrap().until, Some(NOW + 10 * MIN));
-}
-
-#[test]
-fn durations_read_and_print() {
-    assert_eq!(parse_duration("10m"), Some(10 * MIN));
-    assert_eq!(parse_duration("2h"), Some(120 * MIN));
-    assert_eq!(parse_duration("1d"), Some(24 * 60 * MIN));
-    assert_eq!(parse_duration("1w"), Some(7 * 24 * 60 * MIN));
-    assert_eq!(parse_duration("30s"), Some(30_000));
-    for bad in [
-        "",
-        "m",
-        "0m",
-        "-1m",
-        "1.5h",
-        "10",
-        "10x",
-        "99999999999999999w",
-    ] {
-        assert_eq!(parse_duration(bad), None, "{bad}");
-    }
-    assert_eq!(duration_text(61_000), "2 minutes");
-    assert_eq!(duration_text(MIN), "1 minute");
-    assert_eq!(duration_text(2 * 60 * MIN), "2 hours");
-    assert_eq!(duration_text(24 * 60 * MIN), "24 hours");
-    assert_eq!(duration_text(3 * 24 * 60 * MIN), "3 days");
-}
-
-#[test]
-fn a_missing_words_file_falls_back_to_the_built_in_list() {
-    let config = Config {
-        words_file: "nope.txt".into(),
-        ..Config::default()
-    };
-    let (g, problem) = Guard::load(config, Path::new("/nonexistent-horizon"));
-    assert!(problem.unwrap().contains("nope.txt"));
-    assert!(g.filter.matches("nigger"));
-}
-
-#[test]
-fn the_section_reads_from_server_toml() {
-    let c = Config::from_server_toml("[server]\nport = 25565\n").unwrap();
-    assert_eq!(c, Config::default());
-    assert!(c.enabled);
-    let c = Config::from_server_toml(
-        "[chat_filter]\nenabled = true\nmute_after = 3\ntempban_after = 5\nwords_file = \"slurs.txt\"\n",
-    )
-    .unwrap();
-    assert_eq!((c.mute_after, c.tempban_after), (3, 5));
-    assert_eq!(c.words_file, "slurs.txt");
-    assert!(
-        !Config::from_server_toml("[chat_filter]\nenabled = false\n")
-            .unwrap()
-            .enabled
-    );
-    assert!(Config::from_server_toml("[chat_filter]\nmute = 2\n").is_err());
-    assert!(Config::from_server_toml("[chat_filter]\nwindow_minutes = 0\n").is_err());
-}
-
-#[test]
-fn log_lines_have_the_time_the_player_and_the_text() {
-    assert_eq!(utc(0), "1970-01-01T00:00:00Z");
-    assert_eq!(utc(951_782_400_000), "2000-02-29T00:00:00Z");
-    assert_eq!(
-        log_line(NOW, "Ann", 1, "chat", 2, Action::Muted { until: 0 }, "a\nb"),
-        "2026-10-31T18:05:39Z Ann 00000000-0000-0000-0000-000000000001 chat hit 2 muted: a b"
-    );
-}
-
-#[test]
-fn a_message_costs_little() {
-    // A long message through the whole list stays far below a tick (debug builds included).
-    let f = filter();
-    let text = "the quick brown fox jumps over the lazy dog ".repeat(6);
-    let start = std::time::Instant::now();
-    for _ in 0..1000 {
-        assert!(!f.matches(&text));
-    }
-    assert!(start.elapsed().as_millis() < 2000, "{:?}", start.elapsed());
-}
-
-#[test]
-fn an_allow_line_without_letters_allows_nothing() {
-    for line in ["!*", "!-*", "!", "!-"] {
-        let f = Filter::new(&format!("nigger\n{line}\n"));
-        assert!(f.matches("nigger"), "{line}");
-    }
-}
@@ -215,7 +215,7 @@ fn untrusted_http_url(url: &str) -> bool {
    })
 }

-/// `ClickEvent.CODEC` plus the legacy `value` field TextComponentHoverAndClickEventFix
+/// ClickEvent.CODEC plus the legacy `value` field TextComponentHoverAndClickEventFix
 /// renames (`url` / `command` / `page`).
 fn parse_click_event(e: &serde_json::Map<String, Value>) -> Option<crate::text::ClickEvent> {
    let text = |k: &str| e.get(k).and_then(Value::as_str).map(str::to_owned);
@@ -249,13 +249,6 @@ fn parse_click_event(e: &serde_json::Map<String, Value>) -> Option<crate::text::
        Some("show_dialog") => e.get("dialog").map(|dialog| {
            crate::text::ClickEvent::ShowDialog(crate::scoreboard::json_to_tag(dialog))
        }),
-        Some("custom") => Some(crate::text::ClickEvent::Custom {
-            id: crate::identifier::parse_identifier(&text("id")?)?,
-            payload: e
-                .get("payload")
-                .filter(|value| !value.is_null())
-                .map(crate::scoreboard::json_to_tag),
-        }),
        _ => None,
    }
 }
@@ -264,7 +257,10 @@ fn parse_click_event(e: &serde_json::Map<String, Value>) -> Option<crate::text::
 fn object_style(o: &serde_json::Map<String, Value>) -> Style {
    let mut style = Style::default();
    if let Some(c) = o.get("color").and_then(Value::as_str) {
-        style.color = named_color(c).or_else(|| hex_color(c));
+        style.color = named_color(c).or_else(|| {
+            c.strip_prefix('#')
+                .and_then(|h| u32::from_str_radix(h, 16).ok())
+        });
    }
    style.shadow_color = o.get("shadow_color").and_then(shadow_color);
    style.bold = style_flag(o.get("bold"));
@@ -307,13 +303,6 @@ fn object_style(o: &serde_json::Map<String, Value>) -> Style {
    style
 }

-/// `TextColor.parseColor` for `#...`: `Integer.parseInt(rest, 16)` (so a sign
-/// and any digit count are accepted), kept only within `0..=0xFFFFFF`.
-pub(crate) fn hex_color(c: &str) -> Option<u32> {
-    let value = i64::from_str_radix(c.strip_prefix('#')?, 16).ok()?;
-    (0..=0xFF_FFFF).contains(&value).then_some(value as u32)
-}
-
 /// `Style.shadow_color`: a packed ARGB int or normalized RGBA array.
 pub(crate) fn shadow_color(value: &Value) -> Option<u32> {
    if let Some(packed) = value.as_i64() {
@@ -496,33 +485,6 @@ pub fn name_text(tag: &Tag) -> Text {
 mod tests {
    use super::*;

-    #[test]
-    fn hex_color_follows_text_color_parse_color() {
-        for bad in [
-            "#1000000",
-            "#FFFFFFFF",
-            "#-FF",
-            "#",
-            "#zz",
-            "FFFFFF",
-            "#99999999999",
-        ] {
-            assert_eq!(hex_color(bad), None, "{bad}");
-        }
-        for (good, want) in [
-            ("#FFFFFF", 0xFFFFFF),
-            ("#000000", 0),
-            ("#F", 15),
-            ("#+FF", 255),
-            ("#-0", 0),
-        ] {
-            assert_eq!(hex_color(good), Some(want), "{good}");
-        }
-        let out = serde_json::json!({"text": "A", "color": "#1000000"});
-        let text = to_text(&out, &mut |_| Text::empty());
-        assert_eq!(text.spans[0].style.color, None);
-    }
-
    #[test]
    fn shadow_color_accepts_packed_and_rgba_styles() {
        let packed = serde_json::json!({"text": "A", "shadow_color": -16711936});
@@ -623,63 +585,6 @@ mod tests {
        assert_eq!(text.spans[0].style.underlined, Some(true));
    }

-    #[test]
-    fn custom_click_events_keep_payloads_and_inherit_to_inline_objects() {
-        use crate::text::ClickEvent;
-        use horizon_world::nbt::Tag;
-
-        for (payload, expected) in [
-            (None, None),
-            (Some(serde_json::Value::Null), None),
-            (Some(serde_json::json!(42)), Some(Tag::Int(42))),
-            (
-                Some(serde_json::json!({"shop": "potions", "amount": 3})),
-                Some(Tag::Compound(
-                    [
-                        ("amount".into(), Tag::Int(3)),
-                        ("shop".into(), Tag::String("potions".into())),
-                    ]
-                    .into_iter()
-                    .collect(),
-                )),
-            ),
-        ] {
-            let mut event = serde_json::json!({"action": "custom", "id": "test:shop"});
-            if let Some(payload) = payload {
-                event["payload"] = payload;
-            }
-            let component = serde_json::json!({
-                "text": "", "click_event": event,
-                "extra": [{"object": "atlas", "sprite": "minecraft:item/potion"}, "Shop"]
-            });
-            let text = to_text(&component, &mut |_| Text::empty());
-            for (_, style) in text.chars() {
-                assert_eq!(
-                    style.click,
-                    Some(ClickEvent::Custom {
-                        id: "test:shop".into(),
-                        payload: expected.clone(),
-                    })
-                );
-            }
-            let encoded = text.component();
-            let decoded = to_text(&encoded, &mut |_| Text::empty());
-            assert_eq!(decoded, text);
-            if expected.is_none() {
-                assert!(!encoded.to_string().contains("\"payload\""));
-            }
-        }
-        for id in ["Bad ID", "Uppercase:shop"] {
-            let text = to_text(
-                &serde_json::json!({
-                    "text": "Shop", "click_event": {"action": "custom", "id": id}
-                }),
-                &mut |_| Text::empty(),
-            );
-            assert_eq!(text.spans[0].style.click, None);
-        }
-    }
-
    #[test]
    fn the_font_is_inherited_and_kept() {
        let (v, _) =
@@ -719,15 +624,4 @@ mod tests {
        let (v, _) = parse_snbt("{n:1.5}").unwrap();
        assert_eq!(v["n"], Value::from(1.5));
    }
-
-    #[test]
-    fn name_text_preserves_legacy_and_decodes_components() {
-        let legacy = Tag::String("§6Golden Name".into());
-        let text = name_text(&legacy);
-        assert_eq!(text.plain(), "Golden Name");
-
-        let comp = Tag::compound([("text", Tag::String("Custom Name".into()))]);
-        let text = name_text(&comp);
-        assert_eq!(text.plain(), "Custom Name");
-    }
 }
@@ -125,51 +125,19 @@ pub const RULES: &[Rule] = &[
    b("universal_anger", "mobs", false),
    b("water_source_conversion", "updates", true),
 ];
-/// GameRules.MAX_MINECART_SPEED (26.3), available with minecart improvements.
-pub const MAX_MINECART_SPEED: Rule = i("max_minecart_speed", "misc", 8, 1, 1000);
-pub const MINECART_IMPROVEMENTS: &str = "minecraft:minecart_improvements";
-
-pub fn available_rules(minecart_improvements: bool) -> impl Iterator<Item = &'static Rule> {
-    RULES
-        .iter()
-        .chain(minecart_improvements.then_some(&MAX_MINECART_SPEED))
-}
-
 pub fn rule(name: &str) -> Option<&'static Rule> {
    let name = name.strip_prefix("minecraft:").unwrap_or(name);
-    available_rules(true).find(|r| r.name == name)
+    RULES.iter().find(|r| r.name == name)
 }

 /// Current values (defaults unless set).
 #[derive(Clone, Debug, Default, PartialEq)]
 pub struct GameRules {
    values: BTreeMap<&'static str, Value>,
-    minecart_improvements: bool,
 }
 impl GameRules {
-    pub fn with_features(features: &[String]) -> Self {
-        Self {
-            minecart_improvements: features.iter().any(|f| f == MINECART_IMPROVEMENTS),
-            ..Self::default()
-        }
-    }
-    /// GameRules.copy(enabledFeatures): keep available values, add defaults for
-    /// newly enabled rules and discard rules absent from the target feature set.
-    pub fn copy_with_features(&self, features: &[String]) -> Self {
-        let mut rules = Self::with_features(features);
-        for (&name, &value) in &self.values {
-            rules.set(name, value);
-        }
-        rules
-    }
-    pub fn available_rules(&self) -> impl Iterator<Item = &'static Rule> + use<> {
-        available_rules(self.minecart_improvements)
-    }
    pub fn get(&self, name: &str) -> Option<Value> {
        let r = rule(name)?;
-        if r.name == MAX_MINECART_SPEED.name && !self.minecart_improvements {
-            return None;
-        }
        Some(self.values.get(r.name).copied().unwrap_or(r.default))
    }
    pub fn bool(&self, name: &str) -> bool {
@@ -192,9 +160,7 @@ impl GameRules {
    }
    /// Set a rule; false if the name or value type is wrong.
    pub fn set(&mut self, name: &str, value: Value) -> bool {
-        let Some(r) = rule(name).filter(|r| self.get(r.name).is_some()) else {
-            return false;
-        };
+        let Some(r) = rule(name) else { return false };
        let ok = match (r.default, value) {
            (Value::Bool(_), Value::Bool(_)) => true,
            (Value::Int(_), Value::Int(v)) => (r.min..=r.max).contains(&v),
@@ -210,7 +176,8 @@ impl GameRules {
    /// Every rule's value by name without namespace, as `save::Level` holds
    /// them (booleans as 0 or 1).
    pub fn by_name(&self) -> BTreeMap<String, i32> {
-        self.available_rules()
+        RULES
+            .iter()
            .map(|r| {
                let v = match self.values.get(r.name).copied().unwrap_or(r.default) {
                    Value::Bool(b) => i32::from(b),
@@ -222,8 +189,8 @@ impl GameRules {
    }
    /// GameRuleMap codec: `{data: {"minecraft:<rule>": value...}, DataVersion}`.
    pub fn to_nbt(&self) -> NamedTag {
-        let data: Vec<(horizon_world::nbt::JavaString, Tag)> = self
-            .available_rules()
+        let data: Vec<(horizon_world::nbt::JavaString, Tag)> = RULES
+            .iter()
            .map(|r| {
                let v = self.values.get(r.name).copied().unwrap_or(r.default);
                let tag = match v {
@@ -245,14 +212,11 @@ impl GameRules {
        }
    }
    pub fn from_nbt(root: &Tag) -> Self {
-        Self::from_nbt_with_features(root, &[])
-    }
-    pub fn from_nbt_with_features(root: &Tag, features: &[String]) -> Self {
-        let mut rules = Self::with_features(features);
+        let mut rules = Self::default();
        let Some(data) = root.get("data") else {
            return rules;
        };
-        for r in rules.available_rules() {
+        for r in RULES {
            let key = format!("minecraft:{}", r.name);
            let value = data.get(&key).or_else(|| data.get(r.name));
            match (r.default, value) {
@@ -268,18 +232,15 @@ impl GameRules {
        rules
    }
    pub fn load(world: &Path) -> Self {
-        Self::load_with_features(world, &[])
-    }
-    pub fn load_with_features(world: &Path, features: &[String]) -> Self {
        let Ok(bytes) = fs::read(world.join("data/minecraft/game_rules.dat")) else {
-            return Self::with_features(features);
+            return Self::default();
        };
        let Ok(raw) = Compression::Gzip.decode(&bytes, 16 << 20) else {
-            return Self::with_features(features);
+            return Self::default();
        };
        match nbt::read_named(&raw, Limits::default()) {
-            Ok((root, _)) => Self::from_nbt_with_features(&root.tag, features),
-            Err(_) => Self::with_features(features),
+            Ok((root, _)) => Self::from_nbt(&root.tag),
+            Err(_) => Self::default(),
        }
    }
    pub fn save(&self, world: &Path) -> crate::Result<()> {
@@ -3,7 +3,6 @@
 //! from `pack.mcmeta` `language` sections, and a process-wide current
 //! language used by every screen.
 use std::{
-    cell::RefCell,
    collections::{BTreeMap, HashMap},
    sync::{
        Arc, RwLock,
@@ -35,15 +34,6 @@ pub struct Language {
 pub const DEFAULT: &str = "en_us";

 static CURRENT: RwLock<Option<Arc<Language>>> = RwLock::new(None);
-/// A language that only the calling thread sees, and the keys it was asked for and did not have
-/// (`scoped`).
-struct Scope {
-    language: Arc<Language>,
-    missed: Vec<String>,
-}
-thread_local! {
-    static SCOPE: RefCell<Option<Scope>> = const { RefCell::new(None) };
-}
 /// The current language's `bidirectional`, read for every drawn string.
 static BIDIRECTIONAL: AtomicBool = AtomicBool::new(false);

@@ -79,256 +69,6 @@ impl ResourceSource for Bundled {
            "assets/horizon/lang/uk_ua.json" => {
                include_str!("../../horizon-client/assets/horizon/lang/uk_ua.json")
            }
-            "assets/horizon/lang/hi_in.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/hi_in.json")
-            }
-            "assets/horizon/lang/id_id.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/id_id.json")
-            }
-            "assets/horizon/lang/tr_tr.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/tr_tr.json")
-            }
-            "assets/horizon/lang/ko_kr.json" | "assets/horizon/lang/ko.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ko_kr.json")
-            }
-            "assets/horizon/lang/hr_hr.json" | "assets/horizon/lang/hr.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/hr_hr.json")
-            }
-            "assets/horizon/lang/pt_pt.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/pt_pt.json")
-            }
-            "assets/horizon/lang/ur_pk.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ur_pk.json")
-            }
-            "assets/horizon/lang/fa_ir.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/fa_ir.json")
-            }
-            "assets/horizon/lang/he_il.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/he_il.json")
-            }
-            "assets/horizon/lang/hu_hu.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/hu_hu.json")
-            }
-            "assets/horizon/lang/ro_ro.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ro_ro.json")
-            }
-            "assets/horizon/lang/da_dk.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/da_dk.json")
-            }
-            "assets/horizon/lang/fi_fi.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/fi_fi.json")
-            }
-            "assets/horizon/lang/no_no.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/no_no.json")
-            }
-            "assets/horizon/lang/bg_bg.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/bg_bg.json")
-            }
-            "assets/horizon/lang/sk_sk.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/sk_sk.json")
-            }
-            "assets/horizon/lang/lt_lt.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/lt_lt.json")
-            }
-            "assets/horizon/lang/it_it.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/it_it.json")
-            }
-            "assets/horizon/lang/nl_nl.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/nl_nl.json")
-            }
-            "assets/horizon/lang/vi_vn.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/vi_vn.json")
-            }
-            "assets/horizon/lang/th_th.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/th_th.json")
-            }
-            "assets/horizon/lang/ja_jp.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ja_jp.json")
-            }
-            "assets/horizon/lang/ar_sa.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ar_sa.json")
-            }
-            "assets/horizon/lang/pt_br.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/pt_br.json")
-            }
-            "assets/horizon/lang/cs_cz.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/cs_cz.json")
-            }
-            "assets/horizon/lang/sv_se.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/sv_se.json")
-            }
-            "assets/horizon/lang/el_gr.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/el_gr.json")
-            }
-            "assets/horizon/lang/ca_es.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ca_es.json")
-            }
-            "assets/horizon/lang/et_ee.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/et_ee.json")
-            }
-            "assets/horizon/lang/lv_lv.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/lv_lv.json")
-            }
-            "assets/horizon/lang/sl_si.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/sl_si.json")
-            }
-            "assets/horizon/lang/sr_cs.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/sr_cs.json")
-            }
-            "assets/horizon/lang/is_is.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/is_is.json")
-            }
-            "assets/horizon/lang/af_za.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/af_za.json")
-            }
-            "assets/horizon/lang/ms_my.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ms_my.json")
-            }
-            "assets/horizon/lang/be_by.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/be_by.json")
-            }
-            "assets/horizon/lang/sr_sp.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/sr_sp.json")
-            }
-            "assets/horizon/lang/az_az.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/az_az.json")
-            }
-            "assets/horizon/lang/uz_uz.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/uz_uz.json")
-            }
-            "assets/horizon/lang/kk_kz.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/kk_kz.json")
-            }
-            "assets/horizon/lang/ka_ge.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ka_ge.json")
-            }
-            "assets/horizon/lang/hy_am.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/hy_am.json")
-            }
-            "assets/horizon/lang/bs_ba.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/bs_ba.json")
-            }
-            "assets/horizon/lang/mk_mk.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/mk_mk.json")
-            }
-            "assets/horizon/lang/sq_al.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/sq_al.json")
-            }
-            "assets/horizon/lang/cy_gb.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/cy_gb.json")
-            }
-            "assets/horizon/lang/ga_ie.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ga_ie.json")
-            }
-            "assets/horizon/lang/eu_es.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/eu_es.json")
-            }
-            "assets/horizon/lang/gl_es.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/gl_es.json")
-            }
-            "assets/horizon/lang/fil_ph.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/fil_ph.json")
-            }
-            "assets/horizon/lang/ta_in.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ta_in.json")
-            }
-            "assets/horizon/lang/mn_mn.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/mn_mn.json")
-            }
-            "assets/horizon/lang/lo_la.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/lo_la.json")
-            }
-            "assets/horizon/lang/so_so.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/so_so.json")
-            }
-            "assets/horizon/lang/fy_nl.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/fy_nl.json")
-            }
-            "assets/horizon/lang/gd_gb.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/gd_gb.json")
-            }
-            "assets/horizon/lang/lb_lu.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/lb_lu.json")
-            }
-            "assets/horizon/lang/ky_kg.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ky_kg.json")
-            }
-            "assets/horizon/lang/kn_in.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/kn_in.json")
-            }
-            "assets/horizon/lang/mt_mt.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/mt_mt.json")
-            }
-            "assets/horizon/lang/eo_uy.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/eo_uy.json")
-            }
-            "assets/horizon/lang/haw_us.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/haw_us.json")
-            }
-            "assets/horizon/lang/ig_ng.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ig_ng.json")
-            }
-            "assets/horizon/lang/la_la.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/la_la.json")
-            }
-            "assets/horizon/lang/tt_ru.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/tt_ru.json")
-            }
-            "assets/horizon/lang/yi_de.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/yi_de.json")
-            }
-            "assets/horizon/lang/yo_ng.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/yo_ng.json")
-            }
-            "assets/horizon/lang/ba_ru.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/ba_ru.json")
-            }
-            "assets/horizon/lang/br_fr.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/br_fr.json")
-            }
-            "assets/horizon/lang/cv_cu.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/cv_cu.json")
-            }
-            "assets/horizon/lang/fo_fo.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/fo_fo.json")
-            }
-            "assets/horizon/lang/fur_it.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/fur_it.json")
-            }
-            "assets/horizon/lang/li_li.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/li_li.json")
-            }
-            "assets/horizon/lang/lmo.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/lmo.json")
-            }
-            "assets/horizon/lang/oc_fr.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/oc_fr.json")
-            }
-            "assets/horizon/lang/sah_sah.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/sah_sah.json")
-            }
-            "assets/horizon/lang/se_no.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/se_no.json")
-            }
-            "assets/horizon/lang/szl.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/szl.json")
-            }
-            "assets/horizon/lang/vec_it.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/vec_it.json")
-            }
-            "assets/horizon/lang/de_de.json" | "assets/horizon/lang/de_at.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/de_de.json")
-            }
-            // Swiss German writes "ss" for "ß", as vanilla's de_ch does.
-            "assets/horizon/lang/de_ch.json" => {
-                let de = include_str!("../../horizon-client/assets/horizon/lang/de_de.json");
-                return Some(de.replace('ß', "ss").into_bytes());
-            }
-            "assets/horizon/lang/fr_fr.json"
-            | "assets/horizon/lang/fr_ca.json"
-            | "assets/horizon/lang/fr_ch.json" => {
-                include_str!("../../horizon-client/assets/horizon/lang/fr_fr.json")
-            }
            "assets/horizon/lang/es_es.json"
            | "assets/horizon/lang/es_ar.json"
            | "assets/horizon/lang/es_cl.json"
@@ -498,50 +238,8 @@ pub fn set(language: Language) {
    *CURRENT.write().unwrap_or_else(|e| e.into_inner()) = Some(Arc::new(language));
 }
 pub fn current() -> Option<Arc<Language>> {
-    if let Some(language) = SCOPE.with(|s| s.borrow().as_ref().map(|s| s.language.clone())) {
-        return Some(language);
-    }
    CURRENT.read().unwrap_or_else(|e| e.into_inner()).clone()
 }
-/// Runs `f` with `language` as the current language of this thread only, and returns what it
-/// returned with the keys `get` and `get_or` looked up and `language` did not have, in the order
-/// asked and without repeats. Nothing is set process-wide, so a test can draw a screen in another
-/// language while the tests beside it read theirs. Scopes nest: the inner one wins, and the outer
-/// one's misses do not include the inner one's. For tests: `bidirectional` stays the process-wide
-/// language's.
-pub fn scoped<R>(language: Language, f: impl FnOnce() -> R) -> (R, Vec<String>) {
-    /// Puts the outer scope back, also when `f` panics.
-    struct Restore(Option<Scope>);
-    impl Drop for Restore {
-        fn drop(&mut self) {
-            SCOPE.with(|s| *s.borrow_mut() = self.0.take());
-        }
-    }
-    let outer = SCOPE.with(|s| {
-        s.borrow_mut().replace(Scope {
-            language: Arc::new(language),
-            missed: Vec::new(),
-        })
-    });
-    let _restore = Restore(outer);
-    let result = f();
-    let missed = SCOPE.with(|s| {
-        s.borrow_mut()
-            .as_mut()
-            .map(|s| std::mem::take(&mut s.missed))
-    });
-    (result, missed.unwrap_or_default())
-}
-/// `key` was asked for in a `scoped` language that has no text for it.
-fn missed(key: &str) {
-    SCOPE.with(|s| {
-        if let Some(scope) = s.borrow_mut().as_mut()
-            && !scope.missed.iter().any(|m| m == key)
-        {
-            scope.missed.push(key.to_owned());
-        }
-    });
-}
 /// `ClientLanguage.defaultRightToLeft` of the current language.
 pub fn bidirectional() -> bool {
    BIDIRECTIONAL.load(Ordering::Relaxed)
@@ -553,19 +251,13 @@ pub fn code() -> String {
 pub fn get(key: &str) -> String {
    current()
        .and_then(|l| l.get(key).map(str::to_owned))
-        .unwrap_or_else(|| {
-            missed(key);
-            key.to_owned()
-        })
+        .unwrap_or_else(|| key.to_owned())
 }
 /// The translation, or `fallback` when the key is missing.
 pub fn get_or(key: &str, fallback: &str) -> String {
    current()
        .and_then(|l| l.get(key).map(str::to_owned))
-        .unwrap_or_else(|| {
-            missed(key);
-            fallback.to_owned()
-        })
+        .unwrap_or_else(|| fallback.to_owned())
 }
 pub fn has(key: &str) -> bool {
    current().is_some_and(|l| l.get(key).is_some())
@@ -617,24 +309,8 @@ mod tests {
            uk.get("horizon.options.on_screen_keyboard"),
            Some("Екранна клавіатура")
        );
-        let tr = Language::load(&[&empty], "tr_tr");
-        assert_eq!(tr.get("horizon.options.controller"), Some("Kontrolcü"));
        let es = Language::load(&[&empty], "es_es");
        assert_eq!(es.get("horizon.options.controller"), Some("Mando"));
-        // German and French, and their regional variants on the same file
-        // (Swiss German without "ß").
-        let de = Language::load(&[&empty], "de_de");
-        assert_eq!(de.get("horizon.osk.close"), Some("Schließen"));
-        let fr = Language::load(&[&empty], "fr_fr");
-        assert_eq!(fr.get("horizon.osk.close"), Some("Fermer"));
-        for (code, base) in [("de_at", &de), ("fr_ca", &fr), ("fr_ch", &fr)] {
-            let variant = Language::load(&[&empty], code);
-            assert_eq!(variant.map(), base.map(), "{code}");
-        }
-        let de_ch = Language::load(&[&empty], "de_ch");
-        assert_eq!(de_ch.get("horizon.osk.close"), Some("Schliessen"));
-        assert!(de_ch.map().values().all(|v| !v.contains('ß')));
-        assert_eq!(de_ch.len(), de.len());
        let es_ve = Language::load(&[&empty], "es_ve");
        assert_eq!(
            es_ve.get("horizon.options.on_screen_keyboard"),
@@ -642,194 +318,6 @@ mod tests {
        );
    }

-    #[test]
-    fn a_scoped_language_is_the_calling_threads_and_reports_what_it_lacks() {
-        let empty = Mem(HashMap::new());
-        let outside = code();
-        let ((german, english_only, fallback, elsewhere), missed) =
-            scoped(Language::load(&[&empty], "de_de"), || {
-                (
-                    get("horizon.osk.close"),
-                    get("horizon.no_such_key"),
-                    get_or("horizon.no_fallback", "English"),
-                    // Another thread keeps the process-wide language.
-                    std::thread::spawn(code).join().unwrap(),
-                )
-            });
-        assert_eq!(german, "Schließen");
-        assert_eq!(english_only, "horizon.no_such_key");
-        assert_eq!(fallback, "English");
-        assert_eq!(elsewhere, outside);
-        assert_eq!(missed, ["horizon.no_such_key", "horizon.no_fallback"]);
-        // The scope ends with its closure.
-        assert_eq!(code(), outside);
-    }
-
-    #[test]
-    fn scopes_nest_and_end_when_their_closure_panics() {
-        let empty = Mem(HashMap::new());
-        let outside = code();
-        let (inner, missed) = scoped(Language::load(&[&empty], "fr_fr"), || {
-            let (inner, inner_missed) = scoped(Language::load(&[&empty], "pl_pl"), || {
-                (code(), get("horizon.inner_miss"))
-            });
-            assert_eq!(inner_missed, ["horizon.inner_miss"]);
-            assert_eq!(code(), "fr_fr");
-            inner.0
-        });
-        assert_eq!(inner, "pl_pl");
-        assert!(missed.is_empty());
-        let panicked = std::panic::catch_unwind(|| {
-            scoped(Language::load(&[&Mem(HashMap::new())], "de_de"), || {
-                panic!("a test failed inside a scope")
-            })
-        });
-        assert!(panicked.is_err());
-        assert_eq!(code(), outside);
-    }
-
-    /// `crates/horizon-client/assets/horizon/lang`, where Horizon's own strings live.
-    fn bundled_dir() -> std::path::PathBuf {
-        std::path::Path::new(env!("CARGO_MANIFEST_DIR"))
-            .join("../horizon-client/assets/horizon/lang")
-    }
-    /// The keys of a flat bundled file in file order, duplicates included (a map
-    /// would keep only the last of two equal keys). One `"key": "value"` per line.
-    fn file_keys(body: &str) -> Vec<String> {
-        body.lines()
-            .filter(|line| line.starts_with("  \""))
-            .map(|line| {
-                serde_json::Deserializer::from_str(line.trim_start())
-                    .into_iter::<String>()
-                    .next()
-                    .and_then(Result::ok)
-                    .unwrap_or_else(|| panic!("no key on line {line}"))
-            })
-            .collect()
-    }
-    /// The fields the code fills in (`%s`, `%d`, `%1$s`, `%.2f`, `%%`), sorted. A
-    /// percent sign that starts none of them ("100% is") is plain text.
-    fn placeholders(text: &str) -> Vec<String> {
-        let mut found = Vec::new();
-        let mut rest = text;
-        while let Some(at) = rest.find('%') {
-            rest = &rest[at + 1..];
-            let spec = rest
-                .find(|c: char| !(c.is_ascii_digit() || c == '$' || c == '.'))
-                .unwrap_or(rest.len());
-            let after = rest[spec..].chars().next();
-            if after.is_some_and(|c| matches!(c, 's' | 'd' | 'f' | '%')) {
-                let end = spec + 1;
-                found.push(format!("%{}", &rest[..end]));
-                rest = &rest[end..];
-            }
-        }
-        found.sort();
-        found
-    }
-
-    #[test]
-    fn bundled_files_are_served_and_have_no_stale_or_repeated_keys() {
-        let dir = bundled_dir();
-        let en_body = std::fs::read_to_string(dir.join("en_us.json")).unwrap();
-        let en: HashMap<String, String> = serde_json::from_str(&en_body).unwrap();
-        let mut seen = 0;
-        for entry in std::fs::read_dir(&dir).unwrap().flatten() {
-            let name = entry.file_name().into_string().unwrap();
-            let Some(code) = name.strip_suffix(".json") else {
-                continue;
-            };
-            seen += 1;
-            // A file that Bundled::read does not name is never loaded.
-            let path = format!("assets/horizon/lang/{name}");
-            assert!(
-                Bundled.read(&path).is_some(),
-                "{name} is not served by Bundled"
-            );
-            let body = std::fs::read_to_string(entry.path()).unwrap();
-            let map: HashMap<String, String> = serde_json::from_str(&body)
-                .unwrap_or_else(|e| panic!("{name} is not a flat string map: {e}"));
-            let keys = file_keys(&body);
-            assert_eq!(
-                keys.len(),
-                map.len(),
-                "{name} repeats a key or has a multi-line entry"
-            );
-            for (key, value) in &map {
-                // Stale: the code no longer asks for it, or it was renamed in en_us only.
-                let english = en
-                    .get(key)
-                    .unwrap_or_else(|| panic!("{code}: {key} is not in en_us.json"));
-                // A translation keeps the fields the code fills in.
-                assert_eq!(
-                    placeholders(value),
-                    placeholders(english),
-                    "{code}: {key} changes the placeholders of the English text"
-                );
-                assert!(!value.trim().is_empty(), "{code}: {key} is empty");
-            }
-        }
-        assert!(
-            seen >= 7,
-            "found {seen} bundled lang files in {}",
-            dir.display()
-        );
-    }
-
-    #[test]
-    fn every_horizon_key_the_code_names_is_in_en_us() {
-        fn rust_files(dir: &std::path::Path, out: &mut Vec<std::path::PathBuf>) {
-            for entry in std::fs::read_dir(dir).into_iter().flatten().flatten() {
-                let path = entry.path();
-                if path.is_dir() {
-                    rust_files(&path, out);
-                } else if path.extension().is_some_and(|e| e == "rs") {
-                    out.push(path);
-                }
-            }
-        }
-        let en: HashMap<String, String> = serde_json::from_str(
-            &std::fs::read_to_string(bundled_dir().join("en_us.json")).unwrap(),
-        )
-        .unwrap();
-        let crates = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("..");
-        let mut files = Vec::new();
-        for krate in [
-            "horizon-client",
-            "horizon-client-render",
-            "horizon-client-core",
-        ] {
-            rust_files(&crates.join(krate).join("src"), &mut files);
-        }
-        assert!(files.len() > 100, "found only {} sources", files.len());
-        let mut found = 0;
-        for file in files {
-            let text = std::fs::read_to_string(&file).unwrap();
-            for (at, _) in text.match_indices("\"horizon.") {
-                let rest = &text[at + 1..];
-                let Some(end) = rest.find('"') else { continue };
-                let key = &rest[..end];
-                // A key is `horizon.<group>.<name>`: lower-case letters, digits and `_`
-                // between the dots. A key built at run time has a brace; a file name
-                // has one dot; the server addresses that look like keys are listed.
-                const NOT_KEYS: &[&str] = &["horizon.bunchy7s.dev"];
-                let key_like = key
-                    .bytes()
-                    .all(|b| b.is_ascii_lowercase() || b.is_ascii_digit() || b"_.".contains(&b));
-                if key.matches('.').count() < 2 || !key_like || NOT_KEYS.contains(&key) {
-                    continue;
-                }
-                found += 1;
-                assert!(
-                    en.contains_key(key),
-                    "{} names {key}, which is not in en_us.json",
-                    file.display()
-                );
-            }
-        }
-        assert!(found > 50, "found only {found} key names");
-    }
-
    #[test]
    fn layers_selected_language_over_english() {
        let base = Mem(HashMap::from([
@@ -118,12 +118,6 @@ pub fn effect(id: &str) -> Option<&'static EffectDef> {
        None => mod_effect(id),
    }
 }
-/// A content mod's effect id (`<ns>:<path>`), not vanilla's with or
-/// without `minecraft:`.
-#[inline]
-pub fn is_mod_effect(id: &str) -> bool {
-    !id.starts_with("minecraft:") && id.bytes().any(|b| b == b':')
-}
 /// Out of line, so vanilla's lookups (every frame, every tick) stay as they were.
 #[cold]
 #[inline(never)]
@@ -136,28 +130,6 @@ pub fn description_id(id: &str) -> String {
    let (namespace, path) = id.split_once(':').unwrap_or(("minecraft", id));
    format!("effect.{namespace}.{}", path.replace('/', "."))
 }
-/// The effect's sprite in the GUI atlas (`Hud.getMobEffectSprite`: the key
-/// with `mob_effect/` before its path): `mob_effect/<path>` for vanilla's,
-/// `<ns>:mob_effect/<path>` for a mod's.
-pub fn sprite(id: &str) -> String {
-    let mut out = String::new();
-    push_sprite(&mut out, id);
-    out
-}
-/// [`sprite`], appended to `out`.
-pub fn push_sprite(out: &mut String, id: &str) {
-    let path = match id.split_once(':') {
-        None => id,
-        Some(("minecraft", path)) => path,
-        Some((namespace, path)) => {
-            out.push_str(namespace);
-            out.push(':');
-            path
-        }
-    };
-    out.push_str("mob_effect/");
-    out.push_str(path);
-}
 /// Namespaced effect ids for mob effect storage; a mod's id already is.
 pub fn namespaced(id: &'static str) -> &'static str {
    static IDS: OnceLock<HashMap<&'static str, &'static str>> = OnceLock::new();
@@ -328,13 +300,10 @@ mod tests {
    use super::*;

    #[test]
-    fn description_ids_and_sprites_keep_the_namespace() {
+    fn description_ids_keep_the_namespace() {
        assert_eq!(description_id("speed"), "effect.minecraft.speed");
        assert_eq!(description_id("minecraft:speed"), "effect.minecraft.speed");
        assert_eq!(description_id("ruby:curse/dark"), "effect.ruby.curse.dark");
-        assert_eq!(sprite("speed"), "mob_effect/speed");
-        assert_eq!(sprite("minecraft:speed"), "mob_effect/speed");
-        assert_eq!(sprite("ruby:curse/dark"), "ruby:mob_effect/curse/dark");
    }

    /// `PotionContents.getColorOptional`: each visible effect's colour weighted by its
@@ -371,8 +340,6 @@ mod tests {
            (0xFF0000, Category::Neutral, false)
        );
        assert!(effect("glow").is_none() && effect("ruby:late").is_none());
-        assert!(is_mod_effect(glow.id) && !is_mod_effect("speed"));
-        assert!(!is_mod_effect(namespaced("speed")));
        assert_eq!(namespaced(glow.id), "ruby:glow");
        assert_eq!(effect("minecraft:speed").unwrap().id, "speed");
        let ids: Vec<_> = all_effects().map(|e| e.id).collect();
@@ -28,12 +28,6 @@ pub struct Registries {
    /// Game rule name -> integer-valued.
    pub game_rules: Vec<(String, bool)>,
    pub players: Vec<String>,
-    /// A dedicated server's lists, for the completions of `/op`, `/deop`, `/pardon`, `/pardon-ip` and
-    /// `/whitelist`: the operators' names, the banned names and addresses, the whitelisted names.
-    pub ops: Vec<String>,
-    pub banned_players: Vec<String>,
-    pub banned_ips: Vec<String>,
-    pub whitelisted: Vec<String>,
    /// `ClientSuggestionProvider.customCompletionSuggestions`: the extra chat
    /// completions the server sent (ClientboundCustomChatCompletionsPacket),
    /// each once.
@@ -173,16 +167,6 @@ impl Registries {
        fill(&mut self.templates, "templates");
        fill(&mut self.persistent_components, "persistent_components");
        fill(&mut self.learnable_recipes, "learnable_recipes");
-        if self.summonable.is_empty() {
-            self.summonable = strings(&r["summonable"]);
-            self.summonable.sort();
-            self.summonable.dedup();
-        }
-        if self.entity_types.is_empty() {
-            self.entity_types = strings(&r["entity_types"]);
-            self.entity_types.sort();
-            self.entity_types.dedup();
-        }
        const RELOADED: [&str; 5] = [
            "minecraft:advancement",
            "minecraft:recipe",
@@ -223,58 +207,6 @@ impl Registries {
            }
        }
    }
-    /// Only what [`Self::fill_from_export`] takes from an export, to keep
-    /// in place of the export itself (a third of its memory).
-    pub fn from_export(r: &serde_json::Value) -> Self {
-        let mut out = Self::default();
-        out.fill_from_export(r);
-        out
-    }
-    /// [`Self::fill_from_export`] from an export already read with
-    /// [`Self::from_export`]: each field the game left empty, each registry
-    /// it did not list.
-    pub fn fill_from_exported(&mut self, e: &Self) {
-        let fill = |field: &mut Vec<String>, from: &Vec<String>| {
-            if field.is_empty() {
-                field.clone_from(from);
-            }
-        };
-        fill(&mut self.effects, &e.effects);
-        fill(&mut self.enchantments, &e.enchantments);
-        fill(&mut self.attributes, &e.attributes);
-        fill(&mut self.damage_types, &e.damage_types);
-        fill(&mut self.templates, &e.templates);
-        fill(&mut self.persistent_components, &e.persistent_components);
-        fill(&mut self.learnable_recipes, &e.learnable_recipes);
-        if self.summonable.is_empty() {
-            self.summonable.clone_from(&e.summonable);
-            self.summonable.sort();
-            self.summonable.dedup();
-        }
-        if self.entity_types.is_empty() {
-            self.entity_types.clone_from(&e.entity_types);
-            self.entity_types.sort();
-            self.entity_types.dedup();
-        }
-        for (name, ids) in &e.by_registry {
-            if !self.by_registry.contains_key(name) {
-                self.by_registry.insert(name.clone(), ids.clone());
-            }
-        }
-        if self.block_entities.is_empty() {
-            self.block_entities.clone_from(&e.block_entities);
-        }
-        if self.block_tag_members.is_empty() {
-            self.block_tag_members.clone_from(&e.block_tag_members);
-        }
-        if self.clock_time_markers.is_empty() {
-            self.clock_time_markers.clone_from(&e.clock_time_markers);
-        }
-        if self.advancement_criteria.is_empty() {
-            self.advancement_criteria
-                .clone_from(&e.advancement_criteria);
-        }
-    }
    /// The element ids of a registry (sorted).
    pub fn ids(&self, registry: &str) -> &[String] {
        if let Some(r) = self.by_registry.get(registry) {
@@ -107,7 +107,10 @@ pub fn style_from_json(v: &Value) -> Style {
    let mut s = Style::default();
    let Some(o) = v.as_object() else { return s };
    if let Some(c) = o.get("color").and_then(Value::as_str) {
-        s.color = text::named_color(c).or_else(|| component::hex_color(c));
+        s.color = text::named_color(c).or_else(|| {
+            c.strip_prefix('#')
+                .and_then(|h| u32::from_str_radix(h, 16).ok())
+        });
    }
    s.shadow_color = o.get("shadow_color").and_then(component::shadow_color);
    let flag = |k: &str| o.get(k).and_then(Value::as_bool);
@@ -1338,9 +1341,9 @@ fn decompose(c: &Comp) -> (serde_json::Map<String, Value>, Vec<Comp>) {
                    }
                    "color" => {
                        let color = v.as_str().map(|s| match s.strip_prefix('#') {
-                            Some(_) => match component::hex_color(s) {
-                                Some(rgb) => format!("#{rgb:06X}"),
-                                None => s.to_owned(),
+                            Some(hex) => match u32::from_str_radix(hex, 16) {
+                                Ok(rgb) => format!("#{rgb:06X}"),
+                                Err(_) => s.to_owned(),
                            },
                            None => s.to_owned(),
                        });
@@ -39,7 +39,7 @@ pub fn named_color(name: &str) -> Option<u32> {
    COLORS.iter().find(|c| c.1 == name).map(|c| c.2)
 }

-/// Click actions carried by text components.
+/// Click actions carried by locally constructed text components.
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum ClickEvent {
    /// `ClickEvent.OpenUrl`: an http or https link.
@@ -53,11 +53,6 @@ pub enum ClickEvent {
    /// `ClickEvent.ShowDialog`: a `minecraft:dialog` registry id, or the
    /// dialog itself as the component carried it.
    ShowDialog(horizon_world::nbt::Tag),
-    /// `ClickEvent.Custom`: a server-defined action with an optional NBT payload.
-    Custom {
-        id: String,
-        payload: Option<horizon_world::nbt::Tag>,
-    },
    /// A local file to open with the system handler.
    /// Only allow this in locally constructed messages, never server/LAN text.
    OpenFile(String),
@@ -246,28 +241,6 @@ impl Text {
        t.source = Some(Value::Object(c).into());
        t
    }
-    /// Component.translatableWithFallback(key, fallback, args): `translate`, with `fallback` as
-    /// the template when the language has no `key`.
-    pub fn translate_with_fallback(key: &str, fallback: &str, args: &[Text]) -> Self {
-        let template = lang::current()
-            .and_then(|l| l.get(key).map(str::to_owned))
-            .unwrap_or_else(|| fallback.to_owned());
-        let mut t = format_translation(&template, args);
-        let mut c = Map::new();
-        c.insert("translate".into(), key.into());
-        c.insert("fallback".into(), fallback.into());
-        if !args.is_empty() {
-            c.insert("with".into(), args.iter().map(Text::argument).collect());
-        }
-        t.source = Some(Value::Object(c).into());
-        t
-    }
-    /// CommonComponents.optionNameValue: "Caption: value" joined as the language joins them
-    /// (`options.generic_value`: "%s : %s" in French, "%s：%s" in Chinese). English's "%s: %s"
-    /// when the language has no such key, as without prepared resources.
-    pub fn option_name_value(caption: Text, value: Text) -> Self {
-        Self::translate_with_fallback("options.generic_value", "%s: %s", &[caption, value])
-    }
    /// A translatable message whose arguments are plain strings.
    pub fn tr(key: &str, args: &[&dyn std::fmt::Display]) -> Self {
        let args: Vec<Text> = args.iter().map(|a| Text::literal(a.to_string())).collect();
@@ -566,7 +539,7 @@ const STYLE_KEYS: [&str; 11] = [
    "insertion",
    "font",
 ];
-/// `Style.Serializer`: the fields a style sets.
+/// Style.Serializer: the fields a style sets.
 fn style_json(style: &Style) -> Vec<(String, Value)> {
    let mut out = Vec::new();
    if let Some(c) = style.color {
@@ -608,13 +581,6 @@ fn style_json(style: &Style) -> Vec<(String, Value)> {
                "action": "show_dialog",
                "dialog": crate::scoreboard::tag_to_json(dialog),
            }),
-            ClickEvent::Custom { id, payload } => {
-                let mut event = json!({ "action": "custom", "id": id });
-                if let Some(payload) = payload {
-                    event["payload"] = crate::scoreboard::tag_to_json(payload);
-                }
-                event
-            }
            ClickEvent::OpenFile(path) => json!({ "action": "open_file", "path": path }),
        };
        out.push(("click_event".to_owned(), event));
@@ -12,48 +12,13 @@ pub fn uuid_text(u: [i32; 4]) -> String {
    )
 }
 pub fn uuid_from_text(s: &str) -> Option<[i32; 4]> {
-    let mut hex = [0u8; 32];
-    let mut len = 0;
-    for b in s.bytes() {
-        if b == b'-' {
-            continue;
-        }
-        if !b.is_ascii_hexdigit() || len >= 32 {
-            return None;
-        }
-        hex[len] = b;
-        len += 1;
-    }
-    if len != 32 {
+    let hex: String = s.chars().filter(|c| *c != '-').collect();
+    if hex.len() != 32 {
        return None;
    }
-    let hex = std::str::from_utf8(&hex).ok()?;
    let mut out = [0i32; 4];
    for (i, v) in out.iter_mut().enumerate() {
        *v = u32::from_str_radix(&hex[i * 8..i * 8 + 8], 16).ok()? as i32;
    }
    Some(out)
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn uuid_from_text_rejects_multibyte_and_non_hex() {
-        assert_eq!(uuid_from_text("€€€€€€€€€€aa"), None);
-        assert_eq!(uuid_from_text("€€€€€€€€€€aa----"), None);
-        assert_eq!(uuid_from_text("+0000001-0000-0000-0000-000000000000"), None);
-        assert_eq!(uuid_from_text("00000000-0000-0000-0000-00000000000g"), None);
-        assert_eq!(uuid_from_text(""), None);
-    }
-
-    #[test]
-    fn uuid_from_text_parses_hex_and_dashes() {
-        let u = [0x01234567, -0x76543211, 0x01234567, -0x76543211];
-        let text = uuid_text(u);
-        assert_eq!(uuid_from_text(&text), Some(u));
-        let undashed: String = text.chars().filter(|c| *c != '-').collect();
-        assert_eq!(uuid_from_text(&undashed), Some(u));
-    }
-}
@@ -51,10 +51,6 @@ impl InteractionInput {
    pub fn press(&mut self, button: Button) {
        self.clicks[button as usize] += 1;
    }
-    /// Whether a click waits for the next tick.
-    pub fn has_clicks(&self) -> bool {
-        self.clicks.iter().any(|&c| c > 0)
-    }

    pub fn tick(&mut self, world: &mut impl InteractionWorld, attack_down: bool, use_down: bool) {
        let [attack, use_item, pick] = std::mem::take(&mut self.clicks);
@@ -85,19 +81,6 @@ impl InteractionInput {
    }
 }

-/// The sentence of `Minecraft.handleKeybinds` that follows a key which opened
-/// a screen: `Gui.setScreen` has already run `KeyMapping.releaseAll()`, so
-/// `key.use` reads up and the same call releases an active use
-/// (`player.isUsingItem() && !keyUse.isDown()` → `MultiPlayerGameMode.releaseUsingItem`).
-/// Only the screens opened from the keybinds do this (the inventory, chat and
-/// advancements); the pause menu, server containers, mount inventories and
-/// dialogs release on the first tick after closing instead, as vanilla does.
-pub fn release_on_screen_open(world: &mut impl InteractionWorld) {
-    if world.using_item() {
-        world.release_using();
-    }
-}
-
 #[cfg(test)]
 mod tests {
    use super::*;
@@ -483,21 +483,6 @@ impl KeyBinds {
            .find(|mapping| self.get(mapping) == name)
            .and_then(|mapping| key_code(Self::default_of(mapping)))
    }
-    /// `AbstractContainerScreen.checkHotbarKeyPressed`: the off hand and the
-    /// hotbar slots, as the controls bind them now. Answers the key the menu
-    /// acts on (`KeyF` for the off hand, `DigitN` for a slot), so a rebound key
-    /// swaps instead of reaching the screen.
-    pub fn container_hotbar_key(&self, key: KeyCode) -> Option<KeyCode> {
-        let name = key_name(key)?;
-        if self.get("key.swapOffhand") == name {
-            return Some(KeyCode::KeyF);
-        }
-        MAPPINGS
-            .iter()
-            .filter(|m| m.0.starts_with("key.hotbar."))
-            .find(|m| self.get(m.0) == name)
-            .and_then(|m| key_code(Self::default_of(m.0)))
-    }
 }

 #[cfg(test)]
@@ -534,29 +519,6 @@ mod tests {
        assert_eq!(keys.container_mouse_key(MouseButton::Forward, false), None);
    }

-    #[test]
-    fn container_hotkeys_follow_the_bound_keys() {
-        let mut keys = KeyBinds::default();
-        assert_eq!(
-            keys.container_hotbar_key(KeyCode::KeyF),
-            Some(KeyCode::KeyF)
-        );
-        assert_eq!(
-            keys.container_hotbar_key(KeyCode::Digit3),
-            Some(KeyCode::Digit3)
-        );
-        assert_eq!(keys.container_hotbar_key(KeyCode::Tab), None);
-        // The report's key: bound to the off hand, the menu takes it first.
-        keys.set("key.swapOffhand", "key.keyboard.tab");
-        assert_eq!(keys.container_hotbar_key(KeyCode::Tab), Some(KeyCode::KeyF));
-        assert_eq!(keys.container_hotbar_key(KeyCode::KeyF), None);
-        keys.set("key.hotbar.3", "key.keyboard.t");
-        assert_eq!(
-            keys.container_hotbar_key(KeyCode::KeyT),
-            Some(KeyCode::Digit3)
-        );
-    }
-
    #[test]
    fn rebinding_translates_to_defaults() {
        let mut k = KeyBinds::default();
@@ -207,20 +207,6 @@ impl ToggleKeys {

 #[cfg(test)]
 mod tests {
-    /// `KeyMapping.resetToggleKeys` (a new `LocalPlayer`): a sneak and a sprint toggled on in one
-    /// world are off in the next.
-    #[test]
-    fn resetting_the_toggle_keys_puts_every_mapping_up() {
-        let mut keys = ToggleKeys::default();
-        keys.key(0, KeyAction::Press, false, true);
-        keys.key(1, KeyAction::Press, false, true);
-        assert!(keys.is_down(0) && keys.is_down(1));
-        for key in &mut keys.0 {
-            key.reset();
-        }
-        assert!(!keys.is_down(0) && !keys.is_down(1));
-    }
-
    use super::*;
    #[test]
    fn toggle_flips_on_press_and_ignores_release() {
@@ -10,6 +10,5 @@ pub mod interaction_input;
 pub mod key_names;
 pub mod keybinds;
 pub mod keymapping;
-pub mod modifiers;
 pub mod mouse;
 pub mod window;
@@ -1,232 +0,0 @@
-//! OS modifier reconciliation and modifiers synthesized by agent control.
-
-use crate::{
-    keybinds::{KeyBinds, key_code},
-    keymapping::{KeyAction, SNEAK, SPRINT, ToggleKeys},
-};
-use std::collections::HashSet;
-use winit::keyboard::{KeyCode, ModifiersState};
-
-const MODIFIERS: [(ModifiersState, [KeyCode; 2]); 4] = [
-    (
-        ModifiersState::SHIFT,
-        [KeyCode::ShiftLeft, KeyCode::ShiftRight],
-    ),
-    (
-        ModifiersState::CONTROL,
-        [KeyCode::ControlLeft, KeyCode::ControlRight],
-    ),
-    (ModifiersState::ALT, [KeyCode::AltLeft, KeyCode::AltRight]),
-    (
-        ModifiersState::SUPER,
-        [KeyCode::SuperLeft, KeyCode::SuperRight],
-    ),
-];
-
-/// A synthesized key updates the same modifier word as window events.
-/// Releasing one side must preserve the other side's hold.
-pub fn set_key(
-    modifiers: &mut ModifiersState,
-    physical: &mut HashSet<KeyCode>,
-    key: KeyCode,
-    down: bool,
-) {
-    let Some((bit, pair)) = MODIFIERS.iter().find(|(_, pair)| pair.contains(&key)) else {
-        return;
-    };
-    if down {
-        physical.insert(key);
-    } else {
-        physical.remove(&key);
-    }
-    modifiers.set(*bit, pair.iter().any(|key| physical.contains(key)));
-}
-
-/// A modifier held for one synthesized click (the pad's Y, an agent's
-/// shift-click): what [`restore`] puts back once the click is done.
-#[derive(Clone, Copy, Debug)]
-pub struct Held {
-    key: KeyCode,
-    was_down: bool,
-    bit: bool,
-}
-
-/// Holds `key` in both the physical keys and the modifier word, which is
-/// what screens read (`InputWithModifiers.hasShiftDown`).
-pub fn hold(modifiers: &mut ModifiersState, physical: &mut HashSet<KeyCode>, key: KeyCode) -> Held {
-    let bit = MODIFIERS
-        .iter()
-        .find(|(_, pair)| pair.contains(&key))
-        .is_some_and(|(bit, _)| modifiers.contains(*bit));
-    let held = Held {
-        key,
-        was_down: physical.contains(&key),
-        bit,
-    };
-    set_key(modifiers, physical, key, true);
-    held
-}
-
-/// Undoes [`hold`]: a key or bit that was already down stays down.
-pub fn restore(modifiers: &mut ModifiersState, physical: &mut HashSet<KeyCode>, held: Held) {
-    if !held.was_down {
-        physical.remove(&held.key);
-    }
-    if let Some((bit, _)) = MODIFIERS.iter().find(|(_, pair)| pair.contains(&held.key)) {
-        modifiers.set(*bit, held.bit);
-    }
-}
-
-/// Recover missing modifier releases without releasing a rebound key or a pad.
-/// ToggleKeyMapping itself preserves keyboard and controller toggles on release.
-pub fn reconcile(
-    modifiers: ModifiersState,
-    physical: &mut HashSet<KeyCode>,
-    bindings: &KeyBinds,
-    toggles: &mut ToggleKeys,
-    options: [bool; 2],
-    pad_held: [bool; 2],
-) {
-    for (bit, pair) in MODIFIERS {
-        if modifiers.contains(bit) {
-            continue;
-        }
-        for key in pair {
-            if !physical.remove(&key) {
-                continue;
-            }
-            for (slot, name) in [(SNEAK, "key.sneak"), (SPRINT, "key.sprint")] {
-                if key_code(bindings.get(name)) == Some(key) && !pad_held[slot] {
-                    toggles.key(slot, KeyAction::Release, false, options[slot]);
-                }
-            }
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn modifier_taps_release_both_bits() {
-        let mut modifiers = ModifiersState::empty();
-        let mut physical = HashSet::new();
-        for (bit, pair) in MODIFIERS {
-            for key in pair {
-                set_key(&mut modifiers, &mut physical, key, true);
-                assert!(modifiers.contains(bit));
-                set_key(&mut modifiers, &mut physical, key, false);
-                assert!(modifiers.is_empty());
-                assert!(physical.is_empty());
-            }
-        }
-    }
-
-    #[test]
-    fn releasing_one_side_keeps_the_other_modifier_held() {
-        let mut modifiers = ModifiersState::empty();
-        let mut physical = HashSet::new();
-        for (bit, [left, right]) in MODIFIERS {
-            set_key(&mut modifiers, &mut physical, left, true);
-            set_key(&mut modifiers, &mut physical, right, true);
-            set_key(&mut modifiers, &mut physical, left, false);
-            assert!(modifiers.contains(bit));
-            set_key(&mut modifiers, &mut physical, right, false);
-            assert!(modifiers.is_empty());
-        }
-    }
-
-    #[test]
-    fn a_held_click_restores_the_previous_state() {
-        let mut modifiers = ModifiersState::empty();
-        let mut physical = HashSet::new();
-        let held = hold(&mut modifiers, &mut physical, KeyCode::ShiftLeft);
-        assert!(modifiers.shift_key());
-        restore(&mut modifiers, &mut physical, held);
-        assert!(modifiers.is_empty());
-        assert!(physical.is_empty());
-
-        // Right Shift already held, or the OS word set with no physical key.
-        for start in [HashSet::from([KeyCode::ShiftRight]), HashSet::new()] {
-            let mut modifiers = ModifiersState::SHIFT;
-            let mut physical = start.clone();
-            let held = hold(&mut modifiers, &mut physical, KeyCode::ShiftLeft);
-            restore(&mut modifiers, &mut physical, held);
-            assert_eq!(modifiers, ModifiersState::SHIFT);
-            assert_eq!(physical, start);
-        }
-    }
-
-    #[test]
-    fn lost_releases_respect_rebindings_and_pad_holds() {
-        for slot in [SNEAK, SPRINT] {
-            for rebound in [false, true] {
-                for pad in [false, true] {
-                    for toggle in [false, true] {
-                        let mut bindings = KeyBinds::default();
-                        let (name, modifier) = if slot == SNEAK {
-                            ("key.sneak", KeyCode::ShiftLeft)
-                        } else {
-                            ("key.sprint", KeyCode::ControlLeft)
-                        };
-                        if rebound {
-                            bindings.set(name, "key.keyboard.c");
-                        }
-                        let mut physical = HashSet::from([modifier]);
-                        if rebound {
-                            physical.insert(KeyCode::KeyC);
-                        }
-                        let mut toggles = ToggleKeys::default();
-                        toggles.key(slot, KeyAction::Press, false, toggle);
-                        let mut options = [false; 2];
-                        options[slot] = toggle;
-                        let mut pad_held = [false; 2];
-                        pad_held[slot] = pad;
-                        reconcile(
-                            ModifiersState::ALT,
-                            &mut physical,
-                            &bindings,
-                            &mut toggles,
-                            options,
-                            pad_held,
-                        );
-                        assert_eq!(toggles.is_down(slot), rebound || pad || toggle);
-                        assert!(!physical.contains(&modifier));
-                        assert_eq!(physical.contains(&KeyCode::KeyC), rebound);
-                    }
-                }
-            }
-        }
-    }
-
-    #[test]
-    fn unrelated_modifier_change_does_not_release_an_action() {
-        let mut toggles = ToggleKeys::default();
-        toggles.key(SNEAK, KeyAction::Press, false, false);
-        reconcile(
-            ModifiersState::ALT,
-            &mut HashSet::new(),
-            &KeyBinds::default(),
-            &mut toggles,
-            [false; 2],
-            [false; 2],
-        );
-        assert!(toggles.is_down(SNEAK));
-    }
-
-    #[test]
-    fn lost_modifier_release_preserves_a_controller_toggle() {
-        let mut toggles = ToggleKeys::default();
-        toggles.pad_toggle(SNEAK, false);
-        reconcile(
-            ModifiersState::empty(),
-            &mut HashSet::from([KeyCode::ShiftLeft]),
-            &KeyBinds::default(),
-            &mut toggles,
-            [false; 2],
-            [false; 2],
-        );
-        assert!(toggles.is_down(SNEAK));
-    }
-}
@@ -182,38 +182,13 @@ impl LimiterClock for SystemClock {
        i64::try_from(self.origin.elapsed().as_nanos()).unwrap_or(i64::MAX)
    }
    fn park(&mut self, nanos: i64) {
-        let end = self.nanos().saturating_add(nanos);
-        park_in_steps(
-            end,
-            || self.nanos(),
-            |step| {
-                std::thread::sleep(std::time::Duration::from_nanos(step as u64));
-            },
-        );
+        std::thread::sleep(std::time::Duration::from_nanos(nanos.max(0) as u64));
    }
    fn spin(&mut self) {
        std::hint::spin_loop();
    }
 }

-/// The longest single sleep of [`SystemClock::park`].
-const PARK_STEP_NS: i64 = 1_000_000;
-
-/// Sleeps until `now()` reaches `end`, at most [`PARK_STEP_NS`] at a time. macOS lets
-/// a sleep run late by a share of its length (timer coalescing: 1.8-3.5 ms on a 14 ms
-/// sleep, 0.25 ms on 1 ms), more than the limiter's overshoot margin can learn (capped
-/// at 2 ms): a 60 FPS cap gave frames of 17-20 ms. Short steps keep the lateness to
-/// the last step's.
-fn park_in_steps(end: i64, mut now: impl FnMut() -> i64, mut sleep: impl FnMut(i64)) {
-    loop {
-        let left = end - now();
-        if left <= 0 {
-            return;
-        }
-        sleep(left.min(PARK_STEP_NS));
-    }
-}
-
 /// The real clock without busy waiting: where vanilla spins on
 /// `Thread.onSpinWait` for the last half millisecond, this sleeps in short
 /// steps, so a capped frame rate leaves the core idle.
@@ -243,18 +218,6 @@ pub fn end_frame(
    }
 }

-/// [`end_frame`] on a fixed grid of frame slots ([`FramerateLimiter::limit_on_grid`]):
-/// Horizon's Efficient pacing.
-pub fn end_frame_on_grid(
-    limiter: &mut FramerateLimiter,
-    framerate_limit: i32,
-    clock: &mut impl LimiterClock,
-) {
-    if framerate_limit < 260 {
-        limiter.limit_on_grid(framerate_limit, clock);
-    }
-}
-
 impl FramerateLimiter {
    pub fn new(now_ns: i64) -> Self {
        Self::with_state(now_ns, 0, 0)
@@ -285,37 +248,6 @@ impl FramerateLimiter {
            self.average_overshoot_ns = 0;
            self.last_framerate_limit = framerate_limit;
        }
-        self.wait_until(target_time_ns, clock);
-        self.last_frame_time = clock.nanos();
-    }
-    /// Horizon's Efficient pacing: [`Self::limit_display_fps`]'s wait, but each frame's
-    /// slot starts where the last one's ended (its deadline), not when the thread woke
-    /// up. Vanilla's way adds every late wake-up to the frame (on the Mac, 50 us sleeps
-    /// running 0.2 ms late made a 144 FPS cap 139); on a fixed grid the cap holds on
-    /// average. A frame that ends past its slot, or wakes up more than half a frame
-    /// late, starts the grid again from now: no frame is rushed out to catch up.
-    pub fn limit_on_grid(&mut self, framerate_limit: i32, clock: &mut impl LimiterClock) {
-        let period = 1_000_000_000 / i64::from(framerate_limit);
-        if framerate_limit != self.last_framerate_limit {
-            self.average_overshoot_ns = 0;
-            self.last_framerate_limit = framerate_limit;
-        }
-        let deadline = self.last_frame_time + period;
-        if clock.nanos() >= deadline {
-            self.last_frame_time = clock.nanos();
-            return;
-        }
-        self.wait_until(deadline, clock);
-        let woke = clock.nanos();
-        self.last_frame_time = if woke - deadline > period / 2 {
-            woke
-        } else {
-            deadline
-        };
-    }
-    /// `limitDisplayFPS`'s wait: sleep to within the learned overshoot and half a
-    /// millisecond of `target_time_ns`, then spin.
-    fn wait_until(&mut self, target_time_ns: i64, clock: &mut impl LimiterClock) {
        loop {
            let remaining = target_time_ns - clock.nanos();
            if remaining <= 0 {
@@ -339,6 +271,7 @@ impl FramerateLimiter {
                clock.spin();
            }
        }
+        self.last_frame_time = clock.nanos();
    }
    pub fn last_frame_time(&self) -> i64 {
        self.last_frame_time
@@ -540,37 +473,6 @@ pub fn monitor_video_modes(monitor: &winit::monitor::MonitorHandle) -> Vec<Video
        .collect()
 }

-/// The video modes of the window's monitor, listed once per monitor. Listing them takes tens of
-/// milliseconds on Windows, and settings apply at every step of a dragged slider: listing them
-/// each time made the slider stutter.
-#[derive(Debug)]
-pub struct VideoModeList<M = winit::monitor::MonitorHandle> {
-    listed: Option<M>,
-}
-
-impl<M> Default for VideoModeList<M> {
-    fn default() -> Self {
-        Self { listed: None }
-    }
-}
-
-impl<M: PartialEq> VideoModeList<M> {
-    /// The modes of `monitor` when it is not the monitor listed last, else `None` (the list
-    /// stands). No monitor lists none.
-    pub fn refresh(
-        &mut self,
-        monitor: Option<M>,
-        list: impl FnOnce(&M) -> Vec<VideoMode>,
-    ) -> Option<Vec<VideoMode>> {
-        if monitor.is_some() && monitor == self.listed {
-            return None;
-        }
-        let modes = monitor.as_ref().map(list).unwrap_or_default();
-        self.listed = monitor;
-        Some(modes)
-    }
-}
-
 /// `Monitor.currentMode`: the monitor's desktop mode; winit has no such query, so the mode of
 /// the monitor's own size with the highest refresh rate and depth.
 fn monitor_current_mode(
@@ -616,7 +518,6 @@ pub fn fullscreen_request(
 /// it from the `horizon.desktop` entry, macOS from the app bundle). `None` if it can't be read.
 pub fn icon() -> Option<winit::window::Icon> {
    let mut decoder = png::Decoder::new(std::io::Cursor::new(horizon_theme::ICON_PNG));
-    decoder.ignore_checksums(true);
    decoder.set_transformations(png::Transformations::EXPAND | png::Transformations::STRIP_16);
    let mut reader = decoder.read_info().ok()?;
    let mut bytes = vec![0; reader.output_buffer_size()?];
@@ -745,140 +646,6 @@ mod tests {
        assert_eq!(calculate_scale([1920, 1080], 3, true), 4);
        assert_eq!(gui_scaled_size([1921, 1081], 4), [481, 271]);
    }
-    /// A clock whose sleeps run late by a quarter of their length, as macOS's do,
-    /// sleeping as [`SystemClock::park`] does.
-    struct Coalescing {
-        now: std::cell::Cell<i64>,
-    }
-    impl LimiterClock for Coalescing {
-        fn nanos(&mut self) -> i64 {
-            self.now.get()
-        }
-        fn park(&mut self, nanos: i64) {
-            let now = &self.now;
-            park_in_steps(
-                now.get() + nanos,
-                || now.get(),
-                |step| {
-                    now.set(now.get() + step + step / 4);
-                },
-            );
-        }
-        fn spin(&mut self) {
-            self.now.set(self.now.get() + 1000);
-        }
-    }
-    #[test]
-    fn a_frame_cap_holds_when_sleeps_run_late() {
-        let mut clock = Coalescing {
-            now: std::cell::Cell::new(0),
-        };
-        let mut limiter = FramerateLimiter::new(0);
-        let mut last = 0;
-        for frame in 0..120 {
-            // The frame's own work.
-            clock.now.set(clock.now.get() + 2_000_000);
-            limiter.limit_display_fps(60, &mut clock);
-            let period = clock.now.get() - last;
-            last = clock.now.get();
-            assert!(
-                (16_666_666..16_666_666 + 100_000).contains(&period),
-                "frame {frame}: {period} ns"
-            );
-        }
-    }
-    /// A clock whose sleeps and spins each run up to `late` ns late (a different
-    /// share each time), as a loaded machine's do.
-    struct Late {
-        now: i64,
-        late: i64,
-        seed: u64,
-    }
-    impl Late {
-        fn new(late: i64) -> Self {
-            Self {
-                now: 0,
-                late,
-                seed: 0x9e37_79b9_7f4a_7c15,
-            }
-        }
-        fn lateness(&mut self) -> i64 {
-            self.seed ^= self.seed << 13;
-            self.seed ^= self.seed >> 7;
-            self.seed ^= self.seed << 17;
-            (self.seed % 1000) as i64 * self.late / 1000
-        }
-    }
-    impl LimiterClock for Late {
-        fn nanos(&mut self) -> i64 {
-            self.now
-        }
-        fn park(&mut self, nanos: i64) {
-            self.now += nanos + self.lateness();
-        }
-        fn spin(&mut self) {
-            self.now += 50_000 + self.lateness();
-        }
-    }
-    /// Frame periods of 144 FPS frames whose work takes `work(frame)` ns.
-    fn grid_periods(late: i64, work: impl Fn(usize) -> i64) -> Vec<i64> {
-        let mut clock = Late::new(late);
-        let mut limiter = FramerateLimiter::new(0);
-        let mut ends = Vec::new();
-        for frame in 0..300 {
-            clock.now += work(frame);
-            limiter.limit_on_grid(144, &mut clock);
-            ends.push(clock.now);
-        }
-        ends.windows(2).map(|w| w[1] - w[0]).collect()
-    }
-    #[test]
-    fn the_grid_holds_the_cap_when_wake_ups_run_late() {
-        let period = 1_000_000_000 / 144;
-        for late in [0, 50_000, 200_000, 1_000_000] {
-            let periods = grid_periods(late, |_| 2_000_000);
-            let mean = periods[10..].iter().sum::<i64>() / (periods.len() - 10) as i64;
-            assert!(
-                (mean - period).abs() < 10_000,
-                "{late} ns late: mean period {mean} ns"
-            );
-            // Each slot waits at least half a frame: the grid never rushes one out.
-            assert!(
-                periods.iter().all(|&p| p > period / 2),
-                "{late} ns late: {periods:?}"
-            );
-        }
-        // Vanilla's way adds the lateness to the frames: the cap isn't held.
-        let mut clock = Late::new(400_000);
-        let mut limiter = FramerateLimiter::new(0);
-        for _ in 0..300 {
-            clock.now += 2_000_000;
-            limiter.limit_display_fps(144, &mut clock);
-        }
-        assert!(
-            clock.now / 300 > period + 50_000,
-            "vanilla: {} ns",
-            clock.now / 300
-        );
-    }
-    #[test]
-    fn a_long_frame_starts_the_grid_again_without_a_burst() {
-        let period = 1_000_000_000 / 144;
-        // Frame 100 works 30 ms: four slots go by.
-        let periods = grid_periods(
-            50_000,
-            |frame| if frame == 100 { 30_000_000 } else { 2_000_000 },
-        );
-        assert!(periods[99] >= 30_000_000);
-        for (i, &p) in periods.iter().enumerate().skip(100) {
-            // On the grid a slot is a late wake-up (50 us at most) short or long.
-            assert!(
-                (period - 100_000..period + 100_000).contains(&p),
-                "frame {}: {p} ns",
-                i + 1
-            );
-        }
-    }
    #[test]
    fn limiter_paces_frames_at_the_target() {
        let mut limiter = FramerateLimiter::new(0);
@@ -931,28 +698,4 @@ mod tests {
            Some(Immediate)
        );
    }
-
-    #[test]
-    fn video_modes_are_listed_again_only_for_another_monitor() {
-        let mode = |width| VideoMode {
-            width,
-            height: 1080,
-            red_bits: 8,
-            green_bits: 8,
-            blue_bits: 8,
-            refresh_rate: 60.0,
-        };
-        let mut list = VideoModeList::default();
-        let mut listings = 0;
-        let mut modes = |monitor: &i32| {
-            listings += 1;
-            vec![mode(*monitor)]
-        };
-        assert_eq!(list.refresh(Some(1), &mut modes), Some(vec![mode(1)]));
-        assert_eq!(list.refresh(Some(1), &mut modes), None);
-        assert_eq!(list.refresh(Some(2), &mut modes), Some(vec![mode(2)]));
-        assert_eq!(list.refresh(None, &mut modes), Some(vec![]));
-        assert_eq!(list.refresh(Some(2), &mut modes), Some(vec![mode(2)]));
-        assert_eq!(listings, 3);
-    }
 }
@@ -1,235 +0,0 @@
-[package]
-name = "horizon-client-lib"
-autobins = false
-autoexamples = false
-autotests = false
-version = "0.1.0"
-edition.workspace = true
-license.workspace = true
-rust-version = "1.90"
-description = "Reusable client systems, control tool and parity probes"
-
-[lib]
-path = "../horizon-client/src/client_lib.rs"
-
-[dependencies]
-horizon-assets = { path = "../horizon-assets" }
-horizon-client-core = { path = "../horizon-client-core" }
-horizon-client-input = { path = "../horizon-client-input" }
-horizon-client-render = { path = "../horizon-client-render" }
-horizon-command = { path = "../horizon-command" }
-horizon-items = { path = "../horizon-items" }
-horizon-core = { path = "../horizon-core" }
-# `horizon-ctl mcp`: the Model Context Protocol, shared with the launcher and the server.
-horizon-mcp = { path = "../horizon-mcp" }
-# The server thread ahead of the workers (MinecraftServer.spin's Thread.setPriority).
-horizon-optifine = { path = "../horizon-optifine" }
-horizon-threads = { path = "../horizon-threads" }
-horizon-hdr = { path = "../horizon-hdr" }
-horizon-world = { path = "../horizon-world" }
-horizon-protocol = { path = "../horizon-protocol" }
-# server.properties, eula.txt and the user lists, shared with horizon-server.
-horizon-server-files = { path = "../horizon-server-files" }
-# The dedicated server's anticheat, off unless server.toml's [anticheat] turns it on (docs/anticheat.md).
-horizon-anticheat = { path = "../horizon-anticheat" }
-# The dedicated server's chat filter: [chat_filter], the slur list, mutes (docs/chat-filter.md).
-horizon-chat-filter = { path = "../horizon-chat-filter" }
-# Shader packs: reading them and turning their GLSL into naga modules.
-horizon-shaders = { path = "../horizon-shaders" }
-# Horizon's own shader packs: the format, the stages and the check (docs/shaders.md).
-horizon-shader-api = { path = "../horizon-shader-api" }
-horizon-friends = { path = "../horizon-friends" }
-# The narrator (GameNarrator): text-to-speech of chat, system messages and screens.
-horizon-narrator = { path = "../horizon-narrator" }
-# Horizon mods: sandboxed WebAssembly components, off unless installed and turned on (docs/mods.md).
-# Their runtime is the `mods` feature.
-horizon-mods = { path = "../horizon-mods", default-features = false, features = ["index"] }
-wgpu = { version = "30.0.1", default-features = false, features = ["std", "parking_lot", "vulkan", "metal", "wgsl", "naga-ir"] }
-winit = "0.30.13"
-pollster = "0.4"
-bytemuck = { version = "1.24", features = ["derive"] }
-glam = "0.30"
-png = "0.18"
-sha2 = "0.10.9"
-# Server resource packs are checked and cached by their SHA-1, as vanilla does.
-sha1 = "0.10"
-serde = { version = "1", features = ["derive"] }
-serde_json = { version = "1.0.151", features = ["raw_value"] }
-# hlsl-out: the gfx.rs tests translate every shader as wgpu's DirectX 12 backend does. A normal feature,
-# not a dev-dependency's, so builds, tests and examples share one build of naga, wgpu and this crate.
-naga = { version = "30.0.1", features = ["wgsl-in", "hlsl-out"] }
-miniz_oxide = "0.8"
-ab_glyph = "0.2.32"
-log = "0.4"
-chrono = { version = "0.4.42", default-features = false, features = ["clock", "std"] }
-flate2 = { version = "1.1.10", default-features = false, features = ["zlib-rs", "runtime_detection"] }
-# The network threads of a server's players: epoll, kqueue or Windows' AFD (lan/io_pool.rs).
-mio = { version = "1.2.4", features = ["os-poll", "net"] }
-# Shared chunk frames are found by one keyed 128-bit hash of their body (lan/conn.rs SharedFrames).
-xxhash-rust = { version = "0.8.19", features = ["xxh3"] }
-horizon-theme = { path = "../horizon-theme" }
-# Opt-in data collection: the game keeps, the launcher sends (docs/telemetry.md); `live` is
-# the anonymous "I'm playing" ping the game sends itself (`heartbeat.rs`).
-horizon-telemetry = { path = "../horizon-telemetry", default-features = false, features = ["live"] }
-horizon-bench = { path = "../horizon-bench" }
-zip = { version = "9.1.3", default-features = false, features = ["deflate"] }
-# Controllers (evdev + libudev on Linux, IOKit on macOS, Windows.Gaming.Input); the `controllers` feature.
-gilrs = { version = "0.11", optional = true }
-# The DualSense's rumble, adaptive triggers and lights over HID (gilrs only reads it).
-horizon-dualsense = { path = "../horizon-dualsense", optional = true }
-# HTTPS to the Minecraft services (online-mode session join).
-ureq = { version = "2", default-features = false, features = ["tls"] }
-unicode-bidi = "0.3.18"
-# `LevelStorageAccess.estimateDiskSpace`: usable disk space, without unsafe code on Windows.
-fs4 = { version = "1.1.0", default-features = false, features = ["sync"] }
-
-[target.'cfg(unix)'.dependencies]
-# The server thread's CPU time per tick (`HORIZON_SPIKES`, spans.rs).
-rustix = { version = "1", default-features = false, features = ["std", "time", "process", "fs"] }
-
-[target.'cfg(windows)'.dependencies]
-# Use the registered URI handler without routing links through Explorer/cmd.
-open = { version = "5.4.5", features = ["shellexecute-on-windows"] }
-# DirectX 12, where Vulkan has no adapter or device, or by choice (`graphicsApi`, graphics.rs).
-# Shaders compile with FXC (d3dcompiler_47.dll, part of Windows), or DXC when dxcompiler.dll is
-# on the PATH.
-wgpu = { version = "30.0.1", default-features = false, features = ["dx12"] }
-
-[target.'cfg(target_os = "macos")'.dependencies]
-# Splitscreen: a window filling a monitor goes over its menu bar (game/split/windows.rs
-# `above_menu_bar`); all already in the tree through winit and wgpu.
-objc2 = "0.6"
-objc2-app-kit = { version = "0.3", default-features = false, features = ["std", "NSApplication", "NSResponder", "NSWindow", "NSScreen"] }
-objc2-foundation = { version = "0.3", default-features = false, features = ["std", "NSArray", "NSString"] }
-
-[target.'cfg(not(target_os = "macos"))'.dependencies]
-# OpenGL (WGL on Windows, EGL on Linux), the last fallback, for GPUs with no Vulkan or
-# DirectX 12 driver (`graphicsApi`, graphics.rs).
-wgpu = { version = "30.0.1", default-features = false, features = ["gles"] }
-
-[features]
-default = ["audio", "controllers"]
-# Sound output. Without it (and `controllers`) the program links neither libasound nor libudev on
-# Linux: the server build (`--no-default-features`, released as horizon-engine; docs/server.md).
-audio = ["horizon-client-render/audio"]
-# Controllers: gilrs, and the DualSense's own output. Without it only `horizon-ctl pad`'s virtual pad.
-controllers = ["dep:gilrs", "dep:horizon-dualsense", "horizon-client-input/controllers"]
-# Records the call sites of mob random draws (`mob_ai_probe` traces).
-rng-trace = ["horizon-core/rng-trace"]
-# Compatibility with earlier experiment commands: main already uses mimalloc.
-windows-mimalloc = []
-# Opt-in Windows heap experiment; see docs/windows-allocators.md.
-windows-segment-heap = []
-
-[lints]
-workspace = true
-
-[dev-dependencies]
-horizon-client-render = { path = "../horizon-client-render", features = ["test-support"] }
-horizon-items = { path = "../horizon-items", features = ["test-support"] }
-# Every WGSL shader translated as wgpu's DirectX 12 backend does (gfx.rs tests).
-naga = { version = "30.0.1", features = ["wgsl-in", "hlsl-out", "msl-out", "spv-out"] }
-
-[[bin]]
-name = "horizon-ctl"
-path = "../horizon-client/src/bin/horizon-ctl/main.rs"
-
-[[example]]
-name = "chunk_load_bench"
-path = "../horizon-client/examples/chunk_load_bench.rs"
-
-[[example]]
-name = "gen_light_bench"
-path = "../horizon-client/examples/gen_light_bench.rs"
-
-[[example]]
-name = "gameplay_decode_profile"
-path = "../horizon-client/examples/gameplay_decode_profile.rs"
-
-[[example]]
-name = "json_load_bench"
-path = "../horizon-client/examples/json_load_bench.rs"
-
-[[example]]
-name = "mod_port_probe"
-path = "../horizon-client/examples/mod_port_probe.rs"
-
-[[example]]
-name = "model_library_bench"
-path = "../horizon-client/examples/model_library_bench.rs"
-
-[[example]]
-name = "model_states_bench"
-path = "../horizon-client/examples/model_states_bench.rs"
-
-[[example]]
-name = "old_world_fixture"
-path = "../horizon-client/examples/old_world_fixture.rs"
-
-[[example]]
-name = "portal_scan_bench"
-path = "../horizon-client/examples/portal_scan_bench.rs"
-
-[[example]]
-name = "random_tick_eligibility_bench"
-path = "../horizon-client/examples/random_tick_eligibility_bench.rs"
-
-[[example]]
-name = "resource_memory"
-path = "../horizon-client/examples/resource_memory.rs"
-
-[[example]]
-name = "save_batch_bench"
-path = "../horizon-client/examples/save_batch_bench.rs"
-
-[[example]]
-name = "shared_json_startup_profile"
-path = "../horizon-client/examples/shared_json_startup_profile.rs"
-
-[[example]]
-name = "sprite_cache_parity"
-path = "../horizon-client/examples/sprite_cache_parity.rs"
-
-[[example]]
-name = "client_probe"
-path = "../horizon-client/examples/probe/main.rs"
-
-[[test]]
-name = "custom_component_api"
-path = "../horizon-client/tests/custom_component_api.rs"
-
-[[test]]
-name = "custom_component_unregistered"
-path = "../horizon-client/tests/custom_component_unregistered.rs"
-
-[[test]]
-name = "custom_component_wire"
-path = "../horizon-client/tests/custom_component_wire.rs"
-
-[[test]]
-name = "forced_chunks"
-path = "../horizon-client/tests/forced_chunks.rs"
-
-[[test]]
-name = "generation_saves"
-path = "../horizon-client/tests/generation_saves.rs"
-
-[[test]]
-name = "lan_bot"
-path = "../horizon-client/tests/lan_bot.rs"
-
-[[test]]
-name = "streaming_meshes"
-path = "../horizon-client/tests/streaming_meshes.rs"
-
-[[test]]
-name = "tall_column"
-path = "../horizon-client/tests/tall_column.rs"
-
-[[test]]
-name = "wide_states"
-path = "../horizon-client/tests/wide_states.rs"
-
-[[example]]
-name = "chunk_encoding_bench"
-path = "../horizon-client/examples/chunk_encoding_bench.rs"
@@ -7,9 +7,6 @@ rust-version = "1.90"
 description = "The client's world data, rendering and screens: chunks, meshing, light, streaming, the renderer, the HUD, menus and settings; no gameplay"

 [dependencies]
-horizon-cosmetics = { path = "../horizon-cosmetics" }
-# The GUI atlas's pixels, kept compressed once uploaded (hud.rs `pack_pixels`).
-lz4_flex = { version = "0.14", default-features = false, features = ["std", "safe-encode", "safe-decode", "checked-decode"] }
 horizon-assets = { path = "../horizon-assets" }
 horizon-bench = { path = "../horizon-bench" }
 horizon-client-core = { path = "../horizon-client-core" }
@@ -18,11 +15,6 @@ horizon-command = { path = "../horizon-command" }
 horizon-core = { path = "../horizon-core" }
 horizon-hdr = { path = "../horizon-hdr" }
 horizon-items = { path = "../horizon-items" }
-# The narrator option's status and whether the narrator is there (Options.narrator).
-horizon-narrator = { path = "../horizon-narrator" }
-# OptiFine-format pack files: random entity textures (hud.rs), connected textures
-# (connected.rs) and custom item texture rules (cit.rs).
-horizon-optifine = { path = "../horizon-optifine" }
 horizon-protocol = { path = "../horizon-protocol" }
 horizon-shader-api = { path = "../horizon-shader-api" }
 horizon-shaders = { path = "../horizon-shaders" }
@@ -41,18 +33,12 @@ glam = "0.30"
 log = "0.4"
 miniz_oxide = "0.8"
 naga = { version = "30.0.1", features = ["wgsl-in", "glsl-in", "hlsl-out"] }
-half = "2"
 png = "0.18"
-# Project icons served by Modrinth are often WebP or JPEG rather than PNG, and
-# the pack browser showed nothing for those. Both are small pure-Rust decoders.
-image-webp = { version = "0.2", default-features = false }
-zune-jpeg = { version = "0.4", default-features = false, features = ["std"] }
 pollster = "0.4"
 serde = { version = "1", features = ["derive"] }
 serde_json = { version = "1.0.151", features = ["raw_value"] }
 sha1 = "0.10"
 sha2 = "0.10.9"
-smallvec = { version = "1", features = ["const_new"] }
 symphonia = { version = "0.5", default-features = false, features = ["ogg", "vorbis"] }
 unicode-bidi = "0.3.18"
 ureq = { version = "2", default-features = false, features = ["tls"] }
@@ -75,12 +61,9 @@ audio = ["dep:cpal"]
 # Helpers horizon-client's tests build their fixtures with.
 test-support = []

-[build-dependencies]
-horizon-mod-api-gen = { path = "../horizon-mod-api-gen" }
-
 [lints]
 workspace = true

 [dev-dependencies]
 horizon-items = { path = "../horizon-items", features = ["test-support"] }
-naga = { version = "30.0.1", features = ["wgsl-in", "hlsl-out", "glsl-out", "msl-out", "spv-out"] }
+naga = { version = "30.0.1", features = ["wgsl-in", "hlsl-out", "msl-out", "spv-out"] }
@@ -1,7 +0,0 @@
-fn main() {
-    let root =
-        std::path::PathBuf::from(std::env::var_os("CARGO_MANIFEST_DIR").unwrap()).join("../..");
-    let out_dir = std::path::PathBuf::from(std::env::var_os("OUT_DIR").unwrap());
-    horizon_mod_api_gen::generate(&root, &out_dir, horizon_mod_api_gen::Target::Render)
-        .expect("generating native render mod API");
-}
@@ -1,221 +0,0 @@
-//! Original synthetic capability regression; no game resources or player world.
-//! Run with fresh HORIZON_HOME, HORIZON_LAUNCHER_HOME, XDG_DATA_HOME and XDG_CONFIG_HOME,
-//! HORIZON_NO_AUDIO=1 and HORIZON_LAUNCHER_NO_SELF_UPDATE=1.
-use horizon_client_render::{gfx::Renderer, graphics::GraphicsApi};
-use std::{io::Write, sync::Arc};
-use winit::{
-    application::ApplicationHandler,
-    event::WindowEvent,
-    event_loop::{ActiveEventLoop, EventLoop},
-    window::{Window, WindowId},
-};
-
-const VERTEX: &str = "#version 120\nvoid main() { gl_Position = ftransform(); }\n";
-const COLOUR: &str = "#version 120\nvoid main() { gl_FragColor = vec4(1.0); }\n";
-// Reading the actual shadow sampler activates the shadow pass, rather than just
-// placing a shadow program in the archive and assuming the pass runs.
-const SHADOW_READ: &str = "#version 120\nuniform sampler2D shadowtex0;\n\
-    void main() { gl_FragColor = vec4(vec3(texture2D(shadowtex0, vec2(0.5)).r), 1.0); }\n";
-
-fn pack(properties: &str, shadow: Option<&str>, reads_shadow: bool) -> horizon_shaders::Pack {
-    let mut zip = zip::ZipWriter::new(std::io::Cursor::new(Vec::new()));
-    let mut write = |name: &str, text: &str| {
-        zip.start_file(
-            format!("shaders/{name}"),
-            zip::write::SimpleFileOptions::default(),
-        )
-        .unwrap();
-        zip.write_all(text.as_bytes()).unwrap();
-    };
-    write("shaders.properties", properties);
-    write("final.vsh", VERTEX);
-    write("final.fsh", if reads_shadow { SHADOW_READ } else { COLOUR });
-    write("gbuffers_entities.vsh", VERTEX);
-    write("gbuffers_entities.fsh", COLOUR);
-    if let Some(shadow) = shadow {
-        write("shadow.vsh", VERTEX);
-        write("shadow.fsh", shadow);
-    }
-    horizon_shaders::Pack::from_zip_bytes(
-        "original-shadow-ownership",
-        zip.finish().unwrap().into_inner(),
-    )
-    .unwrap()
-}
-
-fn fixture(window: Arc<Window>) -> Result<(), Box<dyn std::error::Error>> {
-    let white = [255; 4];
-    let panorama = Arc::new(horizon_client_render::gfx::panorama::Faces::colour([0; 4]));
-    let mut renderer = pollster::block_on(Renderer::new(
-        window,
-        true,
-        &white,
-        1,
-        1,
-        1,
-        &[],
-        &[],
-        (&white, 1, 1),
-        (&white, 1, 1),
-        (&white, 1, 1),
-        (&white, 1),
-        panorama,
-        None,
-        None,
-        GraphicsApi::Vulkan,
-        false,
-        false,
-        true,
-    ))?;
-    assert!(!renderer.pack_entity_shadows(), "no selected pack");
-    renderer.set_shader_pack(0, None, &[]);
-    assert!(
-        !renderer.pack_entity_shadows(),
-        "selected pack without a compiled post"
-    );
-
-    let cases = [
-        ("full", "", Some(COLOUR), true, false, true),
-        (
-            "player-only",
-            "shadowEntities=false\nshadowPlayer=true",
-            Some(COLOUR),
-            true,
-            false,
-            false,
-        ),
-        // Block-entity shadows alone must not suppress a mob's blob.
-        (
-            "blocks-only",
-            "shadowEntities=false",
-            Some(COLOUR),
-            true,
-            false,
-            false,
-        ),
-        (
-            "disabled",
-            "shadow.enabled=false",
-            Some(COLOUR),
-            true,
-            false,
-            false,
-        ),
-        ("missing-program", "", None, true, false, false),
-        (
-            "failed-translation",
-            "",
-            Some("#version 120\nvoid main() { gl_FragColor = deliberately_undefined; }"),
-            true,
-            false,
-            false,
-        ),
-        ("failed-pipeline", "", Some(COLOUR), true, true, false),
-        (
-            "unused-shadow-program",
-            "",
-            Some(COLOUR),
-            false,
-            false,
-            false,
-        ),
-        (
-            "forced-shadow-program",
-            "shadow.enabled=true",
-            Some(COLOUR),
-            false,
-            false,
-            true,
-        ),
-    ];
-    for dimension in [0, -1, 1] {
-        for (name, properties, shadow, reads_shadow, break_pipeline, expected) in cases {
-            let pack = pack(properties, shadow, reads_shadow);
-            let mut macros = horizon_shaders::Macros::standard();
-            renderer.define_pack_macros(&mut macros);
-            let (properties, _) = horizon_shaders::read_properties(&pack, &mut macros);
-            let mut post = horizon_shaders::load_post(
-                &pack,
-                "",
-                &properties,
-                &macros,
-                &renderer.pack_inputs(),
-            );
-            if name == "failed-translation" {
-                assert!(post.shadow_entities.is_none());
-                assert!(post.notes.iter().any(|note| note.contains("skipped")));
-            } else if name == "missing-program" {
-                assert!(post.shadow_entities.is_none());
-                assert!(post.notes.iter().any(|note| note.contains("no program")));
-            } else if break_pipeline {
-                // A translated stage can still fail device pipeline creation. Inject a
-                // missing entry point into only the entity caster; terrain/block stages
-                // and the settings stay valid. PackPost must report the compiled result.
-                post.shadow_entities
-                    .as_mut()
-                    .unwrap()
-                    .program
-                    .as_mut()
-                    .unwrap()
-                    .vertex
-                    .entry_points[0]
-                    .name = "deliberately_missing_main".into();
-            } else {
-                assert!(post.notes.is_empty(), "{name}: {:?}", post.notes);
-            }
-            let (_, notes) = renderer
-                .set_shader_pack(dimension, Some(post), &[])
-                .unwrap();
-            if break_pipeline {
-                assert!(
-                    notes.iter().any(|note| note.contains("skipped")),
-                    "{notes:?}"
-                );
-            } else if name != "missing-program" && name != "failed-translation" {
-                assert!(
-                    !notes.iter().any(|note| note.contains("skipped")),
-                    "{name}: {notes:?}"
-                );
-            }
-            assert_eq!(
-                renderer.pack_entity_shadows(),
-                expected,
-                "{name}, dimension {dimension}: {notes:?}"
-            );
-            assert!(!renderer.native_shadow());
-            println!("{name}, dimension {dimension}: replaces_mob_blob={expected}");
-        }
-    }
-    renderer.drop_shader_packs();
-    assert!(
-        !renderer.pack_entity_shadows(),
-        "dropped pack restores fallback"
-    );
-    println!("ENTITY_SHADOW_OWNERSHIP_PASSED: 27 compiled controls and no/pending/dropped pack");
-    Ok(())
-}
-
-struct App;
-impl ApplicationHandler for App {
-    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
-        let window = Arc::new(
-            event_loop
-                .create_window(
-                    Window::default_attributes()
-                        .with_visible(false)
-                        .with_inner_size(winit::dpi::LogicalSize::new(32., 32.)),
-                )
-                .unwrap(),
-        );
-        if let Err(error) = fixture(window) {
-            eprintln!("Shadow ownership fixture failed: {error}");
-            std::process::exit(1);
-        }
-        event_loop.exit();
-    }
-    fn window_event(&mut self, _: &ActiveEventLoop, _: WindowId, _: WindowEvent) {}
-}
-
-fn main() {
-    EventLoop::new().unwrap().run_app(&mut App).unwrap();
-}
@@ -1,436 +0,0 @@
-//! How long a big resource pack takes to load and reload, on generated files only (no game
-//! resources): a stand-in vanilla root, a server-style zip pack of many namespaces, and a
-//! high-resolution pack over vanilla's own textures. Each stage runs a few times; the median
-//! is printed as a Markdown table.
-//! `cargo run --profile fast -p horizon-client-render --example pack_load_bench [-- --scale 1]`
-//! (`.github/workflows/pack-bench.yml` runs it on a branch and on its base, side by side).
-use horizon_client_render::{
-    hud::HudAtlas,
-    model_library::ParsedModels,
-    packs::{self, Pack},
-    sprites::Sprites,
-};
-use std::{
-    fs,
-    path::{Path, PathBuf},
-    time::Instant,
-};
-
-/// A small deterministic generator: the same files on every run and every branch.
-struct Noise(u64);
-impl Noise {
-    fn next(&mut self) -> u64 {
-        self.0 ^= self.0 << 13;
-        self.0 ^= self.0 >> 7;
-        self.0 ^= self.0 << 17;
-        self.0
-    }
-}
-
-/// A `side`x`side` RGBA PNG (`frames` tall when animated) of blotchy pixels, which compress
-/// about as well as real textures do.
-fn png(noise: &mut Noise, side: u32, frames: u32, alpha: bool) -> Vec<u8> {
-    let mut out = Vec::new();
-    {
-        let mut encoder = png::Encoder::new(&mut out, side, side * frames);
-        encoder.set_color(png::ColorType::Rgba);
-        encoder.set_depth(png::BitDepth::Eight);
-        let mut writer = encoder.write_header().unwrap();
-        let mut pixels = Vec::with_capacity((side * side * frames * 4) as usize);
-        let mut colour = [0u8; 4];
-        for i in 0..side * side * frames {
-            if i % 3 == 0 {
-                let n = noise.next();
-                colour = [n as u8, (n >> 8) as u8, (n >> 16) as u8, 255];
-                if alpha && n >> 40 & 3 == 0 {
-                    colour[3] = 0;
-                }
-            }
-            pixels.extend_from_slice(&colour);
-        }
-        writer.write_image_data(&pixels).unwrap();
-    }
-    out
-}
-
-fn model(noise: &mut Noise, namespace: &str, texture: &str) -> Vec<u8> {
-    let n = noise.next() % 4;
-    format!(
-        r##"{{"parent":"minecraft:block/cube_all","textures":{{"all":"{namespace}:{texture}"}},"elements":[{{"from":[0,0,0],"to":[16,{h},16],"faces":{{"north":{{"texture":"#all","uv":[0,0,16,16]}},"up":{{"texture":"#all"}}}}}}]}}"##,
-        h = 4 + n * 4
-    )
-    .into_bytes()
-}
-
-fn write(root: &Path, name: &str, bytes: &[u8]) {
-    let path = root.join(name);
-    fs::create_dir_all(path.parent().unwrap()).unwrap();
-    fs::write(path, bytes).unwrap();
-}
-
-/// A deflated zip written by hand (the reader skips CRCs, so they stay zero), at most 65535
-/// entries.
-#[derive(Default)]
-struct ZipOut {
-    out: Vec<u8>,
-    central: Vec<u8>,
-    count: u16,
-}
-impl ZipOut {
-    fn put(&mut self, name: &str, body: &[u8]) {
-        let data = miniz_oxide::deflate::compress_to_vec(body, 6);
-        let offset = u32::try_from(self.out.len()).unwrap();
-        let sizes = [data.len() as u32, body.len() as u32];
-        self.out.extend(0x0403_4b50u32.to_le_bytes());
-        self.out.extend([20, 0, 0, 0, 8, 0]);
-        self.out.extend([0; 8]);
-        sizes.iter().for_each(|s| self.out.extend(s.to_le_bytes()));
-        self.out.extend((name.len() as u16).to_le_bytes());
-        self.out.extend([0; 2]);
-        self.out.extend(name.as_bytes());
-        self.out.extend(&data);
-        self.central.extend(0x0201_4b50u32.to_le_bytes());
-        self.central.extend([20, 0, 20, 0, 0, 0, 8, 0]);
-        self.central.extend([0; 8]);
-        sizes
-            .iter()
-            .for_each(|s| self.central.extend(s.to_le_bytes()));
-        self.central.extend((name.len() as u16).to_le_bytes());
-        self.central.extend([0; 12]);
-        self.central.extend(offset.to_le_bytes());
-        self.central.extend(name.as_bytes());
-        self.count = self.count.checked_add(1).expect("too many zip entries");
-    }
-    fn finish(mut self, path: &Path) {
-        let start = self.out.len() as u32;
-        self.out.extend(&self.central);
-        self.out.extend(0x0605_4b50u32.to_le_bytes());
-        self.out.extend([0; 4]);
-        self.out.extend(self.count.to_le_bytes());
-        self.out.extend(self.count.to_le_bytes());
-        self.out.extend((self.central.len() as u32).to_le_bytes());
-        self.out.extend(start.to_le_bytes());
-        self.out.extend([0; 2]);
-        fs::write(path, self.out).unwrap();
-    }
-}
-
-const META: &[u8] = br#"{"pack":{"description":"bench","min_format":[69,0],"max_format":[999,0]}}"#;
-
-/// The stand-in game resources: vanilla-sized texture folders, models and the stacked JSON
-/// files (lang, sounds, fonts, atlases) every reload merges.
-fn vanilla(root: &Path, scale: usize, noise: &mut Noise) -> Vec<String> {
-    let mut blocks = Vec::new();
-    for i in 0..1100 * scale {
-        let name = format!("block/b{i}");
-        let frames = if i % 50 == 0 { 8 } else { 1 };
-        write(
-            root,
-            &format!("assets/minecraft/textures/{name}.png"),
-            &png(noise, 16, frames, i % 7 == 0),
-        );
-        if frames > 1 {
-            write(
-                root,
-                &format!("assets/minecraft/textures/{name}.png.mcmeta"),
-                br#"{"animation":{"frametime":2}}"#,
-            );
-        }
-        write(
-            root,
-            &format!("assets/minecraft/models/block/b{i}.json"),
-            &model(noise, "minecraft", &name),
-        );
-        blocks.push(format!("minecraft:{name}"));
-    }
-    for (folder, count, side) in [("item", 1500, 16), ("entity", 900, 64), ("gui", 800, 16)] {
-        for i in 0..count * scale {
-            let sub = if folder == "gui" { "sprites/" } else { "" };
-            write(
-                root,
-                &format!(
-                    "assets/minecraft/textures/{folder}/{sub}{}/t{i}.png",
-                    i % 20
-                ),
-                &png(noise, side, 1, true),
-            );
-        }
-    }
-    for i in 0..1500 * scale {
-        write(
-            root,
-            &format!("assets/minecraft/models/item/i{i}.json"),
-            &model(noise, "minecraft", &format!("item/{}/t{i}", i % 20)),
-        );
-    }
-    let lang: String = (0..4000)
-        .map(|i| format!("\"key.{i}\":\"Value {i}\""))
-        .collect::<Vec<_>>()
-        .join(",");
-    write(
-        root,
-        "assets/minecraft/lang/en_us.json",
-        format!("{{{lang}}}").as_bytes(),
-    );
-    write(
-        root,
-        "assets/minecraft/sounds.json",
-        br#"{"a":{"sounds":["a"]}}"#,
-    );
-    write(
-        root,
-        "assets/minecraft/atlases/blocks.json",
-        br#"{"sources":[{"type":"directory","source":"block","prefix":"block/"}]}"#,
-    );
-    write(root, "pack.mcmeta", META);
-    blocks
-}
-
-/// A server pack the way ItemsAdder-style plugins make them: one zip of many namespaces, each
-/// with its own items' textures and models, its sounds and its lang files.
-fn server_zip(path: &Path, scale: usize, noise: &mut Noise) {
-    let mut zip = ZipOut::default();
-    zip.put("pack.mcmeta", META);
-    for n in 0..190 {
-        let ns = format!("plugin{n}");
-        for i in 0..50 * scale {
-            let texture = format!("item/{}/t{i}", i % 5);
-            zip.put(
-                &format!("assets/{ns}/textures/{texture}.png"),
-                &png(noise, 32, 1, true),
-            );
-            zip.put(
-                &format!("assets/{ns}/models/item/{}/m{i}.json", i % 5),
-                &model(noise, &ns, &texture),
-            );
-            if i % 10 == 0 {
-                zip.put(&format!("assets/{ns}/sounds/s{i}.ogg"), &[0; 2048]);
-            }
-        }
-        zip.put(
-            &format!("assets/{ns}/lang/en_us.json"),
-            br#"{"item.custom":"Custom"}"#,
-        );
-    }
-    let lang: String = (0..2000)
-        .map(|i| format!("\"server.{i}\":\"Server {i}\""))
-        .collect::<Vec<_>>()
-        .join(",");
-    zip.put(
-        "assets/minecraft/lang/en_us.json",
-        format!("{{{lang}}}").as_bytes(),
-    );
-    zip.finish(path);
-}
-
-/// A 64x pack over vanilla's own block, item and entity textures, with OptiFine CTM-style
-/// tiles beside them: what the big OptiFine packs look like on disk.
-fn hd_zip(path: &Path, scale: usize, noise: &mut Noise) {
-    let mut zip = ZipOut::default();
-    zip.put("pack.mcmeta", META);
-    for i in 0..1100 * scale {
-        zip.put(
-            &format!("assets/minecraft/textures/block/b{i}.png"),
-            &png(noise, 64, 1, i % 7 == 0),
-        );
-        if i % 4 == 0 {
-            for tile in 0..12 {
-                zip.put(
-                    &format!("assets/minecraft/optifine/ctm/b{i}/{tile}.png"),
-                    &png(noise, 64, 1, false),
-                );
-            }
-            zip.put(
-                &format!("assets/minecraft/optifine/ctm/b{i}/b{i}.properties"),
-                format!("matchTiles=b{i}\nmethod=ctm\ntiles=0-11\n").as_bytes(),
-            );
-        }
-    }
-    for i in 0..750 * scale {
-        zip.put(
-            &format!("assets/minecraft/textures/item/{}/t{i}.png", i % 20),
-            &png(noise, 64, 1, true),
-        );
-    }
-    zip.finish(path);
-}
-
-fn median(mut ms: Vec<f64>) -> f64 {
-    ms.sort_by(f64::total_cmp);
-    ms[ms.len() / 2]
-}
-
-/// `f`'s median time over `runs`, with `before` (not timed) ahead of each run.
-fn time(runs: usize, mut before: impl FnMut(), mut f: impl FnMut()) -> f64 {
-    median(
-        (0..runs)
-            .map(|_| {
-                before();
-                let started = Instant::now();
-                f();
-                started.elapsed().as_secs_f64() * 1000.0
-            })
-            .collect(),
-    )
-}
-
-fn zip_pack(id: &str, path: PathBuf) -> Pack {
-    // Read the way `packs::folder` reads a `resourcepacks/` zip.
-    let dir = path.parent().unwrap().join(format!("{id}-dir"));
-    fs::create_dir_all(&dir).unwrap();
-    let at = dir.join(path.file_name().unwrap());
-    fs::rename(&path, &at).unwrap();
-    packs::folder(&dir, packs::RESOURCE_FORMAT)
-        .into_iter()
-        .next()
-        .unwrap_or_else(|| panic!("{id} is not a pack"))
-}
-
-fn main() {
-    let args: Vec<String> = std::env::args().collect();
-    let scale = args
-        .iter()
-        .position(|a| a == "--scale")
-        .and_then(|i| args.get(i + 1))
-        .map_or(1, |s| s.parse().unwrap());
-    let runs = 3;
-    let scratch = std::env::temp_dir().join(format!("horizon-pack-bench-{}", std::process::id()));
-    let _ = fs::remove_dir_all(&scratch);
-    fs::create_dir_all(&scratch).unwrap();
-    let mut noise = Noise(0x9e37_79b9_7f4a_7c15);
-    let vanilla_root = scratch.join("vanilla");
-    let blocks = vanilla(&vanilla_root, scale, &mut noise);
-    server_zip(&scratch.join("server.zip"), scale, &mut noise);
-    hd_zip(&scratch.join("hd.zip"), scale, &mut noise);
-    let server = zip_pack("server", scratch.join("server.zip"));
-    let hd = zip_pack("hd", scratch.join("hd.zip"));
-    let cache = scratch.join("cache");
-    let both = [hd.clone(), server.clone()];
-
-    let mut rows: Vec<(String, f64)> = Vec::new();
-    let mut row = |name: &str, ms: f64| {
-        eprintln!("{name}: {ms:.1} ms");
-        rows.push((name.to_owned(), ms));
-    };
-    let fresh = || {
-        let _ = fs::remove_dir_all(&cache);
-    };
-    row(
-        "overlay: build, both packs (cold)",
-        time(runs, fresh, || {
-            packs::resource_root(&vanilla_root, &both, &cache).unwrap();
-        }),
-    );
-    let root = packs::resource_root(&vanilla_root, &both, &cache).unwrap();
-    row(
-        "overlay: reuse, both packs (cache hit)",
-        time(
-            runs,
-            || {},
-            || {
-                packs::resource_root(&vanilla_root, &both, &cache).unwrap();
-            },
-        ),
-    );
-    // The pack screen: one pack turned off, then on again.
-    row(
-        "overlay: toggle the server pack off (new selection)",
-        time(
-            runs,
-            || {
-                let only =
-                    packs::resource_root(&vanilla_root, std::slice::from_ref(&hd), &cache).unwrap();
-                fs::remove_dir_all(&only).unwrap();
-            },
-            || {
-                packs::resource_root(&vanilla_root, std::slice::from_ref(&hd), &cache).unwrap();
-            },
-        ),
-    );
-    row(
-        "models: parse every model",
-        time(
-            runs,
-            || {},
-            || {
-                std::hint::black_box(ParsedModels::load(&root));
-            },
-        ),
-    );
-    let sprite_cache = root.join("horizon-sprites.cache");
-    // OptiFine connected-texture tiles, inserted by their path as `ConnectedTextures` does.
-    let tiles: Vec<String> = (0..1100 * scale)
-        .step_by(4)
-        .flat_map(|i| (0..12).map(move |t| format!("assets/minecraft/optifine/ctm/b{i}/{t}.png")))
-        .collect();
-    let sprites = |cold: bool, prefetch: bool, names: &[String], files: bool| {
-        time(
-            runs,
-            || {
-                if cold {
-                    let _ = fs::remove_file(&sprite_cache);
-                }
-            },
-            || {
-                let mut sprites = Sprites::with_disk_cache(&root);
-                if prefetch {
-                    sprites.prefetch(&root, names.iter().map(String::as_str));
-                }
-                for name in names {
-                    if files {
-                        sprites.insert_file(&root, name).unwrap();
-                    } else {
-                        sprites.insert(&root, name).unwrap();
-                    }
-                }
-                sprites.save_disk_cache();
-                sprites.finish();
-                std::hint::black_box(&sprites.pixels);
-            },
-        )
-    };
-    row(
-        "block sprites: one by one (no cache)",
-        sprites(true, false, &blocks, false),
-    );
-    row(
-        "block sprites: prefetched (no cache)",
-        sprites(true, true, &blocks, false),
-    );
-    row(
-        "block sprites: from the disk cache",
-        sprites(false, false, &blocks, false),
-    );
-    row("CTM tiles: one by one", sprites(false, false, &tiles, true));
-    row("CTM tiles: prefetched", sprites(false, true, &tiles, true));
-    row(
-        "GUI atlas: decode and stitch, both packs",
-        time(
-            runs,
-            || {},
-            || {
-                if let Err(e) = HudAtlas::build_over(&root, &vanilla_root) {
-                    eprintln!("GUI atlas failed: {e}");
-                }
-            },
-        ),
-    );
-    row(
-        "GUI atlas: vanilla alone",
-        time(
-            runs,
-            || {},
-            || {
-                let _ = HudAtlas::build(&vanilla_root);
-            },
-        ),
-    );
-
-    let cores = std::thread::available_parallelism().map_or(1, |n| n.get());
-    println!("| Stage (scale {scale}, {cores} threads, median of {runs}) | ms |");
-    println!("|---|---:|");
-    for (name, ms) in &rows {
-        println!("| {name} | {ms:.0} |");
-    }
-    let _ = fs::remove_dir_all(&scratch);
-}
@@ -1,827 +0,0 @@
-//! Draws a scene `horizon-ctl render-capture DIR` wrote, offscreen, from its camera, with the
-//! real `Renderer`, and prints GPU and CPU milliseconds per frame and Horizon's own passes'
-//! GPU times as JSON (docs/graphics.md, "Render capture and replay").
-//! `cargo run --release -p horizon-client-render --example scene_replay -- DIR [--frames 300]
-//! [--warmup 60] [--yaw-offsets 0,90,180,270] [--texture-filtering 0|1|2] [--anisotropy-bit N]
-//! [--mipmaps N] [--lod-distance CHUNKS] [--render-distance CHUNKS] [--size WxH]
-//! [--section-draws flat|indirect] [--section-cull on|off] [--section-sides on|off]
-//! [--gpu-culling on|off] [--root RESOURCES] [--screenshot PNG]
-//! [--world SAVE --leaf-culling MODE] [--memory on]`
-//! `--screenshot` saves the first view's last frame, after the timed frames.
-//! `--world` meshes the captured sections again from that save's region files
-//! (blocks, biomes and saved light; `ao`, `biomeBlendRadius` and `cutoutLeaves`
-//! from `./options.txt`) with `--leaf-culling` (default `off`), so a mesher
-//! change can be measured on the captured view. A section whose 3x3 columns are
-//! not all saved keeps its captured mesh.
-//! `--memory on` adds the renderer's largest GPU resources and, on macOS, the process's
-//! physical footprint by category (`footprint`), taken after the timed frames.
-use horizon_client_render::{
-    assets::{Assets, RenderAssets},
-    biome::Biomes,
-    blocks::BlockFacts,
-    chunk::{BIOME_STRATEGY, Chunk, ColumnLayout, Light, block_strategy},
-    fast_hash::{FxHashMap, FxHashSet},
-    gfx::{
-        PreparedTextures, Renderer, ScreenshotRequest,
-        capture::{self, AtlasCheck, Scene},
-        panorama::Faces,
-    },
-    graphics::LeafCullingMode,
-    hud::HudBatch,
-    lod::TileKey,
-    mesher::{MeshScratch, MeshTables, Mesher, SectionMesh, packed},
-    models,
-};
-use horizon_core::{
-    biome::{BiomeZoom, obfuscate_seed},
-    paletted::PalettedContainer,
-};
-use horizon_world::{
-    chunk::BlockState,
-    nbt::{Limits, NamedTag, Tag},
-    region::RegionFile,
-    registry::BlockRegistry,
-};
-use serde_json::{Value, json};
-use std::{
-    path::{Path, PathBuf},
-    sync::{
-        Arc,
-        atomic::{AtomicUsize, Ordering},
-    },
-    time::{Duration, Instant},
-};
-use winit::{
-    application::ApplicationHandler,
-    event::WindowEvent,
-    event_loop::{ActiveEventLoop, EventLoop},
-    window::{Window, WindowId},
-};
-
-// The game's allocator, so that `--memory`'s footprint is the game's: the system heap kept
-// gigabytes of the meshes `--world` frees dirty.
-#[global_allocator]
-static ALLOCATOR: horizon_threads::Allocator = horizon_threads::ALLOCATOR;
-
-#[derive(Default)]
-struct Options {
-    dir: PathBuf,
-    frames: usize,
-    warmup: usize,
-    yaw_offsets: Vec<f32>,
-    root: Option<PathBuf>,
-    texture_filtering: Option<i32>,
-    anisotropy_bit: Option<i32>,
-    mipmaps: Option<u32>,
-    lod_distance: Option<u32>,
-    render_distance: Option<i32>,
-    size: Option<[u32; 2]>,
-    flat: Option<bool>,
-    cull: Option<bool>,
-    sides: Option<bool>,
-    gpu_culling: Option<bool>,
-    screenshot: Option<PathBuf>,
-    world: Option<PathBuf>,
-    leaf_culling: LeafCullingMode,
-    memory: bool,
-}
-
-fn on_off(value: &str) -> Result<bool, String> {
-    match value {
-        "on" | "flat" => Ok(true),
-        "off" | "indirect" => Ok(false),
-        other => Err(format!("expected on or off, got {other}")),
-    }
-}
-
-fn options() -> Result<Options, String> {
-    let mut o = Options {
-        frames: 300,
-        warmup: 60,
-        yaw_offsets: vec![0.0],
-        ..Default::default()
-    };
-    let mut args = std::env::args().skip(1);
-    let mut dir = None;
-    while let Some(arg) = args.next() {
-        if !arg.starts_with("--") {
-            dir = Some(PathBuf::from(arg));
-            continue;
-        }
-        let value = args.next().ok_or(format!("{arg} needs a value"))?;
-        let number = |v: &str| v.parse::<i64>().map_err(|e| format!("{arg}: {e}"));
-        match arg.as_str() {
-            "--frames" => o.frames = number(&value)?.max(1) as usize,
-            "--warmup" => o.warmup = number(&value)?.max(0) as usize,
-            "--yaw-offsets" => {
-                o.yaw_offsets = value
-                    .split(',')
-                    .map(|v| v.trim().parse::<f32>().map_err(|e| format!("{arg}: {e}")))
-                    .collect::<Result<_, _>>()?
-            }
-            "--root" => o.root = Some(value.into()),
-            "--texture-filtering" => o.texture_filtering = Some(number(&value)? as i32),
-            "--anisotropy-bit" => o.anisotropy_bit = Some(number(&value)? as i32),
-            "--mipmaps" => o.mipmaps = Some(number(&value)?.max(0) as u32),
-            "--lod-distance" => o.lod_distance = Some(number(&value)?.max(0) as u32),
-            "--render-distance" => o.render_distance = Some(number(&value)?.max(0) as i32),
-            "--size" => {
-                let (w, h) = value.split_once('x').ok_or("--size takes WxH")?;
-                o.size = Some([number(w)? as u32, number(h)? as u32]);
-            }
-            "--section-draws" => o.flat = Some(on_off(&value)?),
-            "--section-cull" => o.cull = Some(on_off(&value)?),
-            "--section-sides" => o.sides = Some(on_off(&value)?),
-            "--gpu-culling" => o.gpu_culling = Some(on_off(&value)?),
-            "--screenshot" => o.screenshot = Some(value.into()),
-            "--world" => o.world = Some(value.into()),
-            "--memory" => o.memory = on_off(&value)?,
-            "--leaf-culling" => {
-                o.leaf_culling = LeafCullingMode::ALL
-                    .into_iter()
-                    .find(|mode| mode.name() == value)
-                    .ok_or(format!("no leaf culling mode {value}"))?;
-            }
-            other => return Err(format!("unknown option {other}")),
-        }
-    }
-    o.dir = dir.ok_or("the capture directory is required")?;
-    Ok(o)
-}
-
-/// Milliseconds: average, median, 95th percentile and slowest, over `samples`.
-fn summary(samples: &[f32]) -> Value {
-    if samples.is_empty() {
-        return Value::Null;
-    }
-    let mut sorted = samples.to_vec();
-    sorted.sort_by(f32::total_cmp);
-    let at = |q: f32| sorted[((sorted.len() - 1) as f32 * q).round() as usize];
-    json!({
-        "avg": samples.iter().sum::<f32>() / samples.len() as f32,
-        "min": sorted[0],
-        "p10": at(0.1),
-        "p50": at(0.5),
-        "p95": at(0.95),
-        "max": sorted[sorted.len() - 1],
-        "samples": samples.len(),
-    })
-}
-
-fn ms(d: Duration) -> f32 {
-    d.as_secs_f32() * 1000.0
-}
-
-fn replay(window: Arc<Window>) -> Result<(), Box<dyn std::error::Error>> {
-    let o = options()?;
-    let scene = Scene::read(&o.dir)?;
-    let settings = &scene.settings;
-    let root = o.root.clone().unwrap_or_else(|| settings.resources.clone());
-    let loading = Instant::now();
-    let assets = Assets::load(&root)?;
-    let render = assets.reload(&root)?;
-    if AtlasCheck::of(&render) != settings.atlas {
-        return Err(format!(
-            "the block sprites at {} are not the ones the capture was made with (resource packs \
-             or mods?): pass --root with the game's resource root",
-            root.display()
-        )
-        .into());
-    }
-    let one = [255u8; 4];
-    let zero = [0u8; 4];
-    let prepared = PreparedTextures::new(
-        &render.pixels,
-        render.sprite_size,
-        render.texture_layers,
-        &render.sprite_mips,
-        (&zero[..], 1),
-    )
-    .with_pbr(
-        &render.pbr_normals,
-        &render.pbr_specular,
-        render.pbr_size,
-        render.texture_layers,
-    );
-    let mut renderer = pollster::block_on(Renderer::new(
-        window,
-        true,
-        &render.pixels,
-        render.sprite_size,
-        render.sprite_minimum_size,
-        render.texture_layers,
-        &render.sprite_mips,
-        &render.animations,
-        (&one[..], 1, 1),
-        (&zero[..], 1, 1),
-        (&zero[..], 1, 1),
-        (&zero[..], 1),
-        Arc::new(Faces::colour([0, 0, 0, 255])),
-        Some(prepared),
-        None,
-        settings.graphics_api(),
-        settings.translucent_batching,
-        false,
-        false,
-    ))?;
-    let state = &scene.renderer;
-    let [width, height] = o.size.unwrap_or(state.size);
-    renderer.resize(width, height);
-    renderer.gamma = state.gamma;
-    renderer.fullbright = state.fullbright;
-    renderer.improved_transparency = state.improved_transparency;
-    renderer.animated_textures = state.animated_textures;
-    let filtering = o.texture_filtering.unwrap_or(settings.texture_filtering);
-    let anisotropy = o.anisotropy_bit.unwrap_or(settings.anisotropy_bit);
-    renderer.set_texture_filtering(filtering, anisotropy);
-    renderer.set_mipmap_levels(o.mipmaps.unwrap_or(settings.mipmap_levels));
-    renderer.set_world_post(
-        settings.resolution_scale,
-        settings.fxaa,
-        settings.taa,
-        settings.upscale,
-    );
-    let mut notes = Vec::new();
-    let mut note = |what: &str, result: horizon_client_render::Result<()>| {
-        if let Err(e) = result {
-            notes.push(format!("{what}: {e}"));
-        }
-    };
-    note(
-        "section-draws",
-        renderer.set_flat_draws(o.flat.unwrap_or(state.flat_draws)),
-    );
-    note(
-        "section-cull",
-        renderer.set_section_cull(o.cull.unwrap_or(state.section_cull)),
-    );
-    note(
-        "gpu-culling",
-        renderer.set_gpu_culling(o.gpu_culling.unwrap_or(state.gpu_culling)),
-    );
-    renderer.set_section_sides(o.sides.unwrap_or(state.section_sides));
-    renderer.set_pass_timing(true);
-    let layout = ColumnLayout::of_level(state.min_y, state.sections as i32 * 16);
-    if layout != ColumnLayout::VANILLA {
-        renderer.clear_sections(layout);
-    }
-
-    // Near sections first: with no far tile resident yet, none fades in.
-    let camera = scene.frame.camera;
-    let column = |x: f64| (x.floor() as i32) >> 4;
-    let (cx, cz) = (column(camera[0]), column(camera[2]));
-    let near = |x: i32, z: i32| {
-        o.render_distance
-            .is_none_or(|r| (x - cx).pow(2) + (z - cz).pow(2) <= r * r)
-    };
-    let (mut remeshed, mut world_report) = (FxHashMap::default(), Value::Null);
-    if let Some(world) = &o.world {
-        let keys: Vec<[i32; 3]> = section_keys(&o.dir)?
-            .into_iter()
-            .filter(|&[x, _, z]| near(x, z))
-            .collect();
-        let started = Instant::now();
-        remeshed = remesh(world, &root, &assets, &render, o.leaf_culling, &keys)?;
-        world_report = json!({
-            "save": world.display().to_string(),
-            "leaf_culling": o.leaf_culling.name(),
-            "remeshed": remeshed.len(),
-            "kept": keys.len() - remeshed.len(),
-            "remesh_ms": ms(started.elapsed()),
-        });
-    }
-    let leaf_layers = leaf_layers(&render);
-    let (mut sections, mut quads, mut leaf_quads) = (0, 0usize, 0usize);
-    let mut packed_quads = 0usize;
-    capture::read_meshes(&o.dir, "sections", |[x, y, z], captured| {
-        if near(x, z) {
-            let mesh = remeshed.remove(&[x, y, z]).unwrap_or(captured);
-            quads += mesh.solid.len() / 4;
-            packed_quads += packed::packed_quads(&mesh.packed, mesh.solid.len() / 4);
-            leaf_quads += mesh
-                .solid
-                .iter()
-                .filter(|v| leaf_layers.contains(&v.layer))
-                .count()
-                / 4;
-            renderer.upload((x, y, z), &mesh);
-            sections += 1;
-        }
-    })?;
-    let mut tiles: Vec<(TileKey, SectionMesh)> = Vec::new();
-    capture::read_meshes(&o.dir, "tiles", |[x, z, level], mesh| {
-        let key = TileKey {
-            x,
-            z,
-            level: level as u8,
-        };
-        let [ox, _, oz] = key.origin();
-        let half = f64::from(key.size()) / 2.0;
-        let (dx, dz) = (
-            f64::from(ox) + half - camera[0],
-            f64::from(oz) + half - camera[2],
-        );
-        let near = o
-            .lod_distance
-            .is_none_or(|d| (dx * dx + dz * dz).sqrt() <= f64::from(d) * 16.0);
-        if near {
-            tiles.push((key, mesh));
-        }
-    })?;
-    let tile_count = tiles.len();
-    if !tiles.is_empty() {
-        let cutout: FxHashSet<(i32, i32)> = scene.lod_cutout.iter().copied().collect();
-        renderer.queue_lods(tiles, Vec::new(), Some(cutout));
-        renderer.upload_lods(Duration::from_secs(3600));
-    }
-    let loaded_ms = ms(loading.elapsed());
-
-    let hud = HudBatch::new([width, height]);
-    let mut views = Vec::new();
-    for &offset in &o.yaw_offsets {
-        let mut frame = scene.frame(&hud);
-        frame.yaw += offset;
-        frame.eye_rotation[0] += offset;
-        if let Some(r) = o.render_distance {
-            frame.distance = (r * 16) as f32;
-            frame.detail_distance = frame.distance;
-        }
-        let draw = |renderer: &mut Renderer| -> horizon_client_render::Result<Duration> {
-            if frame.cave_culling {
-                renderer.start_occlusion(frame.camera, frame.distance);
-            }
-            let started = Instant::now();
-            renderer.render(&frame)?;
-            Ok(started.elapsed())
-        };
-        for _ in 0..o.warmup {
-            draw(&mut renderer)?;
-        }
-        renderer.gpu_times.clear();
-        let (mut call, mut encode, mut gpu) = (Vec::new(), Vec::new(), Vec::new());
-        for _ in 0..o.frames {
-            call.push(ms(draw(&mut renderer)?));
-            encode.push(ms(renderer.last_encode));
-            gpu.append(&mut renderer.gpu_times);
-        }
-        // Timestamps arrive a few frames late: a few more of the same frame bring them in.
-        for _ in 0..16 {
-            if gpu.len() >= o.frames {
-                break;
-            }
-            draw(&mut renderer)?;
-            gpu.append(&mut renderer.gpu_times);
-        }
-        gpu.truncate(o.frames);
-        if let Some(path) = o.screenshot.as_ref().filter(|_| views.is_empty()) {
-            renderer.screenshot_result = None;
-            renderer.screenshot = Some(ScreenshotRequest {
-                path: path.clone(),
-                size: None,
-                scaled: false,
-            });
-            for _ in 0..32 {
-                draw(&mut renderer)?;
-                if renderer.screenshot_result.is_some() {
-                    break;
-                }
-            }
-            match renderer.screenshot_result.take() {
-                Some(Ok(_)) => {}
-                Some(Err(e)) => notes.push(format!("screenshot: {e}")),
-                None => notes.push("screenshot: not saved".into()),
-            }
-        }
-        views.push(json!({
-            "yaw_offset": offset,
-            "gpu_ms": summary(&gpu),
-            "render_call_ms": summary(&call),
-            "cpu_encode_ms": summary(&encode),
-            "gpu_passes_median_ms": renderer
-                .own_pass_times()
-                .into_iter()
-                .map(|(name, ms)| (name, json!(ms)))
-                .collect::<serde_json::Map<_, _>>(),
-            "drawn_sections": renderer.drawn_sections,
-            "section_draws": renderer.section_draws,
-            "section_draw_calls": renderer.section_draw_calls,
-            // Occlusion culling's last result: boxes hidden, boxes tested, share of solid
-            // indices hidden.
-            "culled": renderer.culled_sections(),
-        }));
-    }
-    let section_draws = if renderer.flat_draws() {
-        "flat"
-    } else {
-        "indirect"
-    };
-    let memory = o.memory.then(|| memory_report(&renderer));
-    let report = json!({
-        "capture": o.dir.display().to_string(),
-        "adapter": renderer.info.name,
-        "captured_on": state.adapter,
-        "size": [width, height],
-        "sections": sections,
-        "solid_quads": quads,
-        "leaf_quads": leaf_quads,
-        // Solid quads uploaded as one record each (`mesher::packed`).
-        "packed_quads": packed_quads,
-        "world": world_report,
-        "tiles": tile_count,
-        "load_ms": loaded_ms,
-        "frames": o.frames,
-        "warmup": o.warmup,
-        "settings": {
-            "texture_filtering": filtering,
-            "anisotropy_bit": anisotropy,
-            "mipmaps": o.mipmaps.unwrap_or(settings.mipmap_levels),
-            "lod_distance": o.lod_distance,
-            "render_distance": o.render_distance,
-            "section_draws": section_draws,
-            "section_cull": renderer.section_cull(),
-            "section_sides": renderer.section_sides(),
-            "gpu_culling": renderer.gpu_culling(),
-            "shader_pack_left_out": state.shader_pack,
-        },
-        "notes": notes,
-        "views": views,
-        "memory": memory,
-    });
-    println!("{}", serde_json::to_string_pretty(&report)?);
-    Ok(())
-}
-
-fn mb(bytes: u64) -> f64 {
-    (bytes as f64 / 1048576.0 * 10.0).round() / 10.0
-}
-
-/// `--memory`: the renderer's census in MiB and, on macOS, `footprint`'s summary of this
-/// process (GPU buffers and textures count as IOAccelerator memory there).
-fn memory_report(renderer: &Renderer) -> Value {
-    let gpu: serde_json::Map<String, Value> = renderer
-        .gpu_census()
-        .into_iter()
-        .map(|(name, bytes)| (format!("{name}_mb"), json!(mb(bytes))))
-        .collect();
-    let footprint = std::process::Command::new("/usr/bin/footprint")
-        .args(["-f", "bytes", "-p", &std::process::id().to_string()])
-        .output()
-        .ok()
-        .map(|out| String::from_utf8_lossy(&out.stdout).into_owned());
-    let footprint = footprint.map(|text| {
-        let mut total = None;
-        let mut categories = Vec::new();
-        for line in text.lines() {
-            if let Some(at) = line.find("Footprint: ") {
-                total = line[at + 11..]
-                    .split_whitespace()
-                    .next()
-                    .and_then(|v| v.parse::<u64>().ok());
-            }
-            // "  <dirty> B  <clean> B  <reclaimable> B  <regions>  <category>"
-            let words: Vec<&str> = line.split_whitespace().collect();
-            if words.len() >= 8
-                && words[1] == "B"
-                && let Ok(dirty) = words[0].parse::<u64>()
-                && dirty >= 1 << 20
-            {
-                categories.push(json!([words[7..].join(" "), mb(dirty)]));
-            }
-        }
-        json!({ "total_mb": total.map(mb), "dirty_by_category_mb": categories })
-    });
-    json!({ "gpu": gpu, "footprint": footprint })
-}
-
-struct App;
-impl ApplicationHandler for App {
-    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
-        let window = Arc::new(
-            event_loop
-                .create_window(Window::default_attributes().with_visible(false))
-                .unwrap(),
-        );
-        if let Err(error) = replay(window) {
-            eprintln!("scene_replay: {error}");
-            std::process::exit(1);
-        }
-        event_loop.exit();
-    }
-    fn window_event(&mut self, _: &ActiveEventLoop, _: WindowId, _: WindowEvent) {}
-}
-
-fn main() {
-    EventLoop::new().unwrap().run_app(&mut App).unwrap();
-}
-
-/// The captured sections' keys, from the index alone.
-fn section_keys(dir: &Path) -> Result<Vec<[i32; 3]>, Box<dyn std::error::Error>> {
-    #[derive(serde::Deserialize)]
-    struct Key {
-        key: [i32; 3],
-    }
-    let records: Vec<Key> = serde_json::from_reader(std::io::BufReader::new(std::fs::File::open(
-        dir.join("sections.json"),
-    )?))?;
-    Ok(records.into_iter().map(|r| r.key).collect())
-}
-
-/// Sprite layers of every leaves block, as terrain vertices carry them (with or
-/// without `OPAQUE_LAYER`).
-fn leaf_layers(render: &RenderAssets) -> FxHashSet<u16> {
-    render
-        .sprite_layers
-        .iter()
-        .filter(|(name, _)| name.ends_with("_leaves"))
-        .flat_map(|(_, &layer)| {
-            [
-                layer as u16,
-                layer as u16 | horizon_client_render::mesher::OPAQUE_LAYER,
-            ]
-        })
-        .collect()
-}
-
-/// `--world`: the sections `keys` meshed again from `save`'s overworld region
-/// files, on every core, as the game's workers mesh them.
-fn remesh(
-    save: &Path,
-    root: &Path,
-    assets: &Assets,
-    render: &RenderAssets,
-    leaf_culling: LeafCullingMode,
-    keys: &[[i32; 3]],
-) -> Result<FxHashMap<[i32; 3], SectionMesh>, Box<dyn std::error::Error>> {
-    let facts = BlockFacts::load(root, assets.registry)?;
-    let visibility = models::load_visibility(root, assets.registry)?;
-    let tables = MeshTables::new(assets, render, &facts, visibility)?;
-    let biomes = Biomes::load(root)?;
-    let seed = world_seed(save).unwrap_or_else(|| {
-        eprintln!(
-            "scene_replay: no seed in {}, biome blending uses 0",
-            save.display()
-        );
-        0
-    });
-    let options = std::fs::read_to_string("options.txt").unwrap_or_default();
-    let option = |key: &str| {
-        options
-            .lines()
-            .find_map(|l| l.strip_prefix(key)?.strip_prefix(':').map(str::to_owned))
-    };
-    let smooth_lighting = option("ao").is_none_or(|v| v == "true");
-    let cutout_leaves = option("cutoutLeaves").is_none_or(|v| v == "true");
-    let blend_radius = option("biomeBlendRadius")
-        .and_then(|v| v.parse().ok())
-        .unwrap_or(2);
-
-    let mut columns: Vec<(i32, i32)> = keys
-        .iter()
-        .flat_map(|&[x, _, z]| {
-            (-1..=1).flat_map(move |dz| (-1..=1).map(move |dx| (x + dx, z + dz)))
-        })
-        .collect();
-    columns.sort_unstable();
-    columns.dedup();
-    let threads = std::thread::available_parallelism().map_or(4, |n| n.get());
-    let region_dir = save.join("dimensions/minecraft/overworld/region");
-    let next = AtomicUsize::new(0);
-    let chunks: FxHashMap<(i32, i32), Chunk> = std::thread::scope(|scope| {
-        let workers: Vec<_> = (0..threads)
-            .map(|_| {
-                scope.spawn(|| {
-                    let mut files: FxHashMap<(i32, i32), Option<RegionFile>> = FxHashMap::default();
-                    let mut out = Vec::new();
-                    loop {
-                        let i = next.fetch_add(1, Ordering::Relaxed);
-                        let Some(&(x, z)) = columns.get(i) else {
-                            break;
-                        };
-                        let file = files.entry((x >> 5, z >> 5)).or_insert_with(|| {
-                            RegionFile::open(region_dir.join(format!(
-                                "r.{}.{}.mca",
-                                x >> 5,
-                                z >> 5
-                            )))
-                            .ok()
-                        });
-                        let root = file
-                            .as_mut()
-                            .and_then(|f| {
-                                f.read(horizon_core::position::ChunkPos::new(x, z))
-                                    .ok()
-                                    .flatten()
-                            })
-                            .and_then(|record| record.nbt(Limits::default()).ok());
-                        if let Some(chunk) =
-                            root.and_then(|root| decode(&root, assets.registry, &biomes))
-                        {
-                            out.push(((x, z), chunk));
-                        }
-                    }
-                    out
-                })
-            })
-            .collect();
-        workers
-            .into_iter()
-            .flat_map(|w| w.join().unwrap())
-            .collect()
-    });
-
-    let meshable: Vec<[i32; 3]> = keys
-        .iter()
-        .copied()
-        .filter(|&[x, _, z]| {
-            (-1..=1).all(|dz| (-1..=1).all(|dx| chunks.contains_key(&(x + dx, z + dz))))
-        })
-        .collect();
-    let next = AtomicUsize::new(0);
-    let meshes = std::thread::scope(|scope| {
-        let workers: Vec<_> = (0..threads)
-            .map(|_| {
-                scope.spawn(|| {
-                    let mut mesher = Mesher {
-                        nether_shading: false,
-                        shader_pack_lighting: false,
-                        separate_ao: false,
-                        assets,
-                        render,
-                        tables: &tables,
-                        biomes: &biomes,
-                        visibility: tables.visibility.clone(),
-                        zoom: BiomeZoom::new(obfuscate_seed(seed)),
-                        blend_radius,
-                        smooth_lighting,
-                        cutout_leaves,
-                        translucent_layers: &[],
-                        leaf_culling,
-                    };
-                    let mut scratch = MeshScratch::default();
-                    let mut out = Vec::new();
-                    loop {
-                        let i = next.fetch_add(1, Ordering::Relaxed);
-                        let Some(&[x, y, z]) = meshable.get(i) else {
-                            break;
-                        };
-                        let region: [[Option<&Chunk>; 3]; 3] = std::array::from_fn(|dz| {
-                            std::array::from_fn(|dx| {
-                                chunks.get(&(x + dx as i32 - 1, z + dz as i32 - 1))
-                            })
-                        });
-                        let mut mesh =
-                            mesher.mesh_reusing(&region, y, SectionMesh::default(), &mut scratch);
-                        mesh.sort_solid();
-                        out.push(([x, y, z], mesh));
-                    }
-                    out
-                })
-            })
-            .collect();
-        workers
-            .into_iter()
-            .flat_map(|w| w.join().unwrap())
-            .collect::<FxHashMap<_, _>>()
-    });
-    Ok(meshes)
-}
-
-/// The world seed: `data/minecraft/world_gen_settings.dat`, or level.dat's
-/// `Data.WorldGenSettings` in older saves.
-fn world_seed(save: &Path) -> Option<i64> {
-    let read = |path: PathBuf| {
-        horizon_world::datafix::files::read_dat(&path)
-            .ok()
-            .flatten()
-    };
-    let seed = |tag: Option<&Tag>| match tag?.get("seed")? {
-        Tag::Long(seed) => Some(*seed),
-        _ => None,
-    };
-    seed(
-        read(save.join("data/minecraft/world_gen_settings.dat"))
-            .as_ref()
-            .and_then(|t| t.get("data")),
-    )
-    .or_else(|| {
-        seed(
-            read(save.join("level.dat"))?
-                .get("Data")?
-                .get("WorldGenSettings"),
-        )
-    })
-}
-
-/// A saved full chunk's blocks, biomes and light, as the client's own save
-/// loader reads them (`save::decode_lit`, in horizon-client).
-fn decode(root: &NamedTag, registry: &BlockRegistry, biomes: &Biomes) -> Option<Chunk> {
-    let tag = &root.tag;
-    let text = |t: Option<&Tag>| match t {
-        Some(Tag::String(s)) => Some(s.to_string_lossy().to_string()),
-        _ => None,
-    };
-    if text(tag.get("Status")).is_some_and(|s| s != "minecraft:full" && s != "full") {
-        return None;
-    }
-    if tag.get("isLightOn") != Some(&Tag::Byte(1)) {
-        return None;
-    }
-    let (Some(Tag::Int(x)), Some(Tag::Int(z))) = (tag.get("xPos"), tag.get("zPos")) else {
-        return None;
-    };
-    let mut chunk = Chunk::with_layout(*x, *z, ColumnLayout::VANILLA);
-    let air = registry.default_state("minecraft:air")?.0;
-    let Some(Tag::List(sections)) = tag.get("sections") else {
-        return Some(chunk);
-    };
-    let longs = |t: Option<&Tag>| match t {
-        Some(Tag::LongArray(data)) => Some(data.iter().map(|&w| w as u64).collect::<Vec<_>>()),
-        _ => None,
-    };
-    let mut layers = vec![(None, None); chunk.sections.len()];
-    for section in sections {
-        let Some(Tag::Byte(y)) = section.get("Y") else {
-            continue;
-        };
-        let Some(si) = chunk.section_index(i32::from(*y) * 16) else {
-            continue;
-        };
-        let target = Arc::make_mut(&mut chunk.sections[si]);
-        if let Some(states) = section.get("block_states")
-            && let Some(Tag::List(palette)) = states.get("palette")
-        {
-            let palette: Vec<u32> = palette
-                .iter()
-                .map(|p| {
-                    BlockState::from_nbt(p)
-                        .ok()
-                        .and_then(|s| {
-                            registry.id(&s).or_else(|| {
-                                let default = registry.default_state(&s.name)?;
-                                let mut full = registry.state(default)?.clone();
-                                for (k, v) in &s.properties {
-                                    if full.properties.contains_key(k) {
-                                        full.properties.insert(k.clone(), v.clone());
-                                    }
-                                }
-                                registry.id(&full).or(Some(default))
-                            })
-                        })
-                        .map_or(air, |id| id.0)
-                })
-                .collect();
-            let data = longs(states.get("data"));
-            if let Ok(blocks) =
-                PalettedContainer::from_packed(block_strategy(), palette, data.as_deref())
-            {
-                target.blocks = blocks;
-            }
-        }
-        if let Some(b) = section.get("biomes")
-            && let Some(Tag::List(palette)) = b.get("palette")
-        {
-            let palette: Vec<u32> = palette
-                .iter()
-                .map(|p| match p {
-                    Tag::String(s) => u32::from(biomes.id(&s.to_string_lossy())),
-                    _ => 0,
-                })
-                .collect();
-            let data = longs(b.get("data"));
-            if let Ok(container) =
-                PalettedContainer::from_packed(BIOME_STRATEGY, palette, data.as_deref())
-            {
-                target.biomes = container;
-            }
-        }
-        let layer = |name: &str| match section.get(name) {
-            Some(Tag::ByteArray(a)) if a.len() == 2048 => Some(a.clone()),
-            _ => None,
-        };
-        layers[si] = (layer("SkyLight"), layer("BlockLight"));
-    }
-    // `save::load_light`: a section without saved sky light takes the light
-    // of the blocks above it, from the top of the column down.
-    let mut above = [15u8; 256];
-    for (si, (sky, block)) in layers.into_iter().enumerate().rev() {
-        let mut data = Box::new([0u8; 4096]);
-        for (i, v) in data.iter_mut().enumerate() {
-            let nibble =
-                |layer: &Option<Vec<u8>>| layer.as_ref().map(|l| l[i >> 1] >> ((i & 1) << 2) & 15);
-            let s = nibble(&sky).unwrap_or(above[i & 255]);
-            let b = nibble(&block).unwrap_or(0);
-            *v = s << 4 | b;
-        }
-        if sky.is_some() {
-            for (i, a) in above.iter_mut().enumerate() {
-                *a = data[i] >> 4;
-            }
-        }
-        let section = Arc::make_mut(&mut chunk.sections[si]);
-        section.light = Light::Full(data);
-        section.compact();
-    }
-    chunk.lit = true;
-    chunk.light_loaded = true;
-    Some(chunk)
-}
@@ -1,399 +0,0 @@
-//! Original asset-free standard-pack entity fixture. Run with throwaway HORIZON_HOME,
-//! HORIZON_LAUNCHER_HOME, XDG_DATA_HOME and XDG_CONFIG_HOME (AGENTS.md).
-//! `cargo run -p horizon-client-render --example standard_pack_gpu_entities -- <output-dir>`
-use client::{
-    gfx::{
-        Frame, Renderer, ScreenshotRequest,
-        entity_skin::{SkinFrame, SkinJob, SkinPart, SkinVertex},
-        native_render,
-        pack_draw::EntitySpan,
-    },
-    graphics::GraphicsApi,
-    hud::HudBatch,
-};
-use horizon_client_render as client;
-use std::{
-    path::Path,
-    sync::{
-        Arc,
-        atomic::{AtomicBool, AtomicUsize, Ordering},
-    },
-};
-use winit::{
-    application::ApplicationHandler,
-    event::WindowEvent,
-    event_loop::{ActiveEventLoop, EventLoop},
-    window::{Window, WindowId},
-};
-
-static NEEDS_SPANS: AtomicBool = AtomicBool::new(false);
-static OBSERVED: AtomicUsize = AtomicUsize::new(0);
-struct Observer;
-impl native_render::RenderHooks for Observer {
-    fn render_needs(&self, event: &mut native_render::RenderNeedsEvent<'_>) {
-        event.needs.entity_spans |= NEEDS_SPANS.load(Ordering::Relaxed);
-    }
-    fn world_drawn(&self, event: &mut native_render::WorldDrawnEvent<'_, '_>) {
-        if NEEDS_SPANS.load(Ordering::Relaxed) {
-            assert_eq!(event.world.entities.len(), 12);
-            assert_eq!(
-                event.world.spans.iter().map(|s| s.id).collect::<Vec<_>>(),
-                [77, 88, 99]
-            );
-            OBSERVED.fetch_add(1, Ordering::Relaxed);
-        }
-    }
-}
-
-fn pack(renderer: &mut Renderer, folder: &Path, valid: bool) {
-    let shaders = folder.join("shaders");
-    std::fs::create_dir_all(&shaders).unwrap();
-    let vertex = "#version 120\nvarying vec2 uv; void main(){gl_Position=ftransform();uv=gl_MultiTexCoord0.xy;}\n";
-    let fragment = "#version 120\nuniform int entityId; uniform int blockEntityId; uniform vec4 entityColor; void main(){gl_FragData[0]=vec4(float(entityId)/255.0,entityColor.a,float(blockEntityId)/255.0,1.0);}\n";
-    for program in [
-        "gbuffers_entities",
-        "gbuffers_block",
-        "gbuffers_entities_translucent",
-    ] {
-        std::fs::write(shaders.join(format!("{program}.vsh")), vertex).unwrap();
-        std::fs::write(
-            shaders.join(format!("{program}.fsh")),
-            if valid {
-                fragment
-            } else {
-                "#version 120\nvoid main(){ invalid shader; }"
-            },
-        )
-        .unwrap();
-    }
-    std::fs::write(shaders.join("final.vsh"), vertex).unwrap();
-    std::fs::write(shaders.join("final.fsh"), "#version 120\nvarying vec2 uv; uniform sampler2D colortex0; void main(){gl_FragColor=texture2D(colortex0,uv);}\n").unwrap();
-    std::fs::write(
-        shaders.join("shaders.properties"),
-        "oldLighting=false\nshadow.enabled=false\n",
-    )
-    .unwrap();
-    let pack = horizon_shaders::Pack::open(folder).unwrap();
-    let mut macros = horizon_shaders::Macros::standard();
-    renderer.define_pack_macros(&mut macros);
-    let (properties, _) = horizon_shaders::read_properties(&pack, &mut macros);
-    let post = horizon_shaders::load_post(&pack, "", &properties, &macros, &renderer.pack_inputs());
-    assert_eq!(post.notes.is_empty(), valid, "{:?}", post.notes);
-    let (_, notes) = renderer.set_shader_pack(0, Some(post), &[]).unwrap();
-    assert!(
-        !valid || notes.iter().all(|n| !n.contains("skipped")),
-        "{notes:?}"
-    );
-}
-
-fn read(path: &Path) -> Vec<u8> {
-    let decoder = png::Decoder::new(std::io::BufReader::new(std::fs::File::open(path).unwrap()));
-    let mut reader = decoder.read_info().unwrap();
-    let mut bytes = vec![0; reader.output_buffer_size().unwrap()];
-    let info = reader.next_frame(&mut bytes).unwrap();
-    assert_eq!(info.color_type, png::ColorType::Rgba);
-    bytes.truncate(info.buffer_size());
-    bytes
-}
-
-fn fixture(window: Arc<Window>) -> Result<(), Box<dyn std::error::Error>> {
-    let out = std::env::args().nth(1).ok_or("output directory required")?;
-    let out = Path::new(&out);
-    std::fs::create_dir_all(out)?;
-    native_render::install(Box::new([&Observer])).map_err(|_| "observer already installed")?;
-    let white = [255; 16 * 16 * 4];
-    let zero = [0; 4];
-    let mut renderer = pollster::block_on(Renderer::new(
-        window,
-        true,
-        &white,
-        16,
-        16,
-        1,
-        &[],
-        &[],
-        (&white, 16, 16),
-        (&zero, 1, 1),
-        (&zero, 1, 1),
-        (&zero, 1),
-        Arc::new(client::gfx::panorama::Faces::colour([0, 0, 0, 255])),
-        None,
-        None,
-        GraphicsApi::Vulkan,
-        false,
-        false,
-        true,
-    ))?;
-    renderer.resize(320, 180);
-    assert!(
-        renderer.skins_entities(),
-        "fixture requires compute skinning"
-    );
-    let unmodified_tagged = renderer.skins_tagged();
-    pack(&mut renderer, &out.join("valid-pack"), true);
-    assert!(
-        !renderer.skins_tagged(),
-        "eye/tagged layers keep the CPU path with a pack"
-    );
-
-    let spans = [77, 88, 99]
-        .into_iter()
-        .enumerate()
-        .map(|(i, id)| EntitySpan {
-            start: i as u32 * 4,
-            stage: horizon_shaders::render_stage("ENTITIES"),
-            id,
-            hidden: i == 2,
-            ..Default::default()
-        })
-        .collect::<Vec<_>>();
-    let mut skin = SkinFrame {
-        reset: true,
-        vertices: 12,
-        spans: spans.clone(),
-        parts: vec![SkinPart {
-            matrix: glam::Mat4::IDENTITY.to_cols_array(),
-            normal: glam::Mat3::IDENTITY.to_cols_array(),
-        }],
-        ..Default::default()
-    };
-    for (i, x) in [-1.8, 0.3, -0.7].into_iter().enumerate() {
-        for (pos, uv) in [
-            [x, -0.8, 5.],
-            [x, 0.8, 5.],
-            [x + 1.4, 0.8, 5.],
-            [x + 1.4, -0.8, 5.],
-        ]
-        .into_iter()
-        .zip([[0., 0.], [0., 1.], [1., 1.], [1., 0.]])
-        {
-            skin.new_model.push(SkinVertex {
-                pos,
-                uv,
-                axis: 5,
-                part: 0,
-            });
-        }
-        skin.jobs.push(SkinJob {
-            first: i as u32 * 4,
-            dst: i as u32 * 4,
-            count: 4,
-            rect: [0., 0., 1., 1.],
-            color: u32::MAX,
-            light: 0xf0f0,
-            overlay: if i == 0 { 1 } else { 5 },
-            ..Default::default()
-        });
-    }
-    let cpu = client::gfx::entity_skin::expand(&skin.new_model, &skin);
-    let hud = HudBatch::new([320, 180]);
-    let mut frame = fixture_frame(&hud);
-    frame.title = false;
-    frame.camera = glam::DVec3::ZERO;
-    frame.eye = glam::DVec3::ZERO;
-    frame.pitch = 0.;
-    frame.entities = &cpu;
-    frame.entity_spans = &spans;
-    renderer.screenshot = Some(ScreenshotRequest {
-        path: out.join("cpu.png"),
-        size: None,
-        scaled: false,
-    });
-    renderer.render(&frame)?;
-    let expected = read(&out.join("cpu.png"));
-    let matches = expected
-        .as_chunks::<4>()
-        .0
-        .iter()
-        .filter(|p| p[..3] == [77, 77, 0])
-        .count();
-    assert!(
-        matches > 100,
-        "original entity-ID/hurt output, got {matches} pixels"
-    );
-    let white = expected
-        .as_chunks::<4>()
-        .0
-        .iter()
-        .filter(|p| p[..3] == [88, 192, 0])
-        .count();
-    assert!(
-        white > 100,
-        "original entity-ID/white-flash output, got {white} pixels"
-    );
-    assert_eq!(
-        expected
-            .as_chunks::<4>()
-            .0
-            .iter()
-            .filter(|p| p[0] == 99)
-            .count(),
-        0,
-        "hidden caster is not camera-visible"
-    );
-    assert!(
-        renderer.skins_entities(),
-        "compiled standard-pack stages must accept GPU posing"
-    );
-    frame.entities = &[];
-    frame.entity_spans = &[];
-    frame.skin = Some(&skin);
-    renderer.screenshot = Some(ScreenshotRequest {
-        path: out.join("gpu.png"),
-        size: None,
-        scaled: false,
-    });
-    renderer.render(&frame)?;
-    assert_eq!(
-        read(&out.join("gpu.png")),
-        expected,
-        "CPU and GPU standard-pack pixels"
-    );
-
-    NEEDS_SPANS.store(true, Ordering::Relaxed);
-    assert!(
-        !renderer.skins_entities(),
-        "native CPU-stream observer keeps its fallback"
-    );
-    frame.skin = None;
-    frame.entities = &cpu;
-    frame.entity_spans = &spans;
-    renderer.render(&frame)?;
-    assert_eq!(OBSERVED.load(Ordering::Relaxed), 1);
-    NEEDS_SPANS.store(false, Ordering::Relaxed);
-    assert!(renderer.skins_entities());
-    pack(&mut renderer, &out.join("failed-pack"), false);
-    assert!(
-        !renderer.skins_entities(),
-        "failed entity programs retain CPU posing"
-    );
-    renderer.drop_shader_packs();
-    assert!(
-        renderer.skins_entities(),
-        "ordinary path returns when the pack is dropped"
-    );
-    assert_eq!(renderer.skins_tagged(), unmodified_tagged);
-    std::fs::write(
-        out.join("result.json"),
-        serde_json::to_vec_pretty(&serde_json::json!({
-            "cpu_gpu_pixels_equal": true, "entity_id_hurt_pixels": matches, "hidden_subject_pixels": 0,
-                "entity_id_white_flash_pixels": white,
-                "graphics_adapter": client::crash::system_details("fixture").into_iter()
-                    .find(|(name, _)| name == "Graphics Adapter").map(|(_, detail)| detail),
-            "native_observer_frames": OBSERVED.load(Ordering::Relaxed), "player_game_started": false,
-            "fixture_only_not_gameplay_or_fps_proof": true
-        }))?,
-    )?;
-    Ok(())
-}
-
-struct App;
-impl ApplicationHandler for App {
-    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
-        let window = Arc::new(
-            event_loop
-                .create_window(Window::default_attributes().with_visible(false))
-                .unwrap(),
-        );
-        if let Err(error) = fixture(window) {
-            eprintln!("fixture failed: {error}");
-            std::process::exit(1);
-        }
-        event_loop.exit();
-    }
-    fn window_event(&mut self, _: &ActiveEventLoop, _: WindowId, _: WindowEvent) {}
-}
-fn main() {
-    for key in [
-        "HORIZON_HOME",
-        "HORIZON_LAUNCHER_HOME",
-        "XDG_DATA_HOME",
-        "XDG_CONFIG_HOME",
-    ] {
-        assert!(
-            std::env::var_os(key).is_some(),
-            "set throwaway {key} (AGENTS.md)"
-        );
-    }
-    EventLoop::new().unwrap().run_app(&mut App).unwrap();
-}
-
-fn fixture_frame(hud: &HudBatch) -> Frame<'_> {
-    Frame {
-        weather: &[],
-        weather_time: client::weather::Time::new(0, 0.0),
-        camera: glam::DVec3::new(0.5, 100.0, 0.5),
-        yaw: 0.0,
-        pitch: 10.0,
-        fov_degrees: 85.0,
-        eye: glam::DVec3::new(0.5, 100.0, 0.5),
-        eye_rotation: [0.0, 10.0],
-        first_person: true,
-        bob: glam::Mat4::IDENTITY,
-        spin: glam::Mat4::IDENTITY,
-        sky: client::environment::Sky::default(),
-        shadow_scene_revision: (0, 0),
-        shadow_cache: false,
-        distance: 12.0,
-        detail_distance: 12.0,
-        depth_far: 1000.0,
-        underwater: false,
-        water_plane: None,
-        cave_culling: false,
-        title: true,
-        sky_blocked: false,
-        skybox: false,
-        end_sky: false,
-        end_sky_sprite: None,
-        environment_fog: None,
-        water_fog: [0.0; 3],
-        fog: None,
-        dark_disc: false,
-        outline: Vec::new(),
-        outline_after_terrain: false,
-        outline_high_contrast: false,
-        debug_lines: &[],
-        debug_lines_on_top: &[],
-        debug_crosshair: &[],
-        hud,
-        glint_alpha: 0.75,
-        glint_ticks: 0.0,
-        nether_lighting: false,
-        entities: &[],
-        static_block_entities: &[],
-        visible_static_block_entity_sections: &[],
-        static_block_entity_stats: Default::default(),
-        entity_motion: &[],
-        entity_spans: &[],
-        skin: None,
-        glowing: &[],
-        dynamic_lights: &[],
-        colored_lights: &[],
-        emissive_layers: &[],
-        clouds: None,
-        lightning: Default::default(),
-        additive: &[],
-        see_through: &[],
-        shadow_only: &[],
-        celestial: &[],
-        stars: None,
-        hand: &[],
-        hand_items: &[],
-        hand_fov_degrees: 70.0,
-        screen: &[],
-        pack: Default::default(),
-        border: None,
-        game_time: 0.0,
-        shader_game_time: 0.0,
-        end_portal_sprites: [[0.0; 4]; 2],
-        crumbling_sprite: [0.0; 4],
-        ticks: 0,
-        darkness: (0.0, 0.0),
-        night_vision: 0.0,
-        block_flicker: 0.0,
-        boss_darken: 0.0,
-        chunk_fade: 0.0,
-        post_effects: client::post_chain::Request::none(),
-        menu_blur: None,
-    }
-}
@@ -93,26 +93,10 @@ pub struct RenderAssets {
    pub model_gallery: Vec<Value>,
    pub animations: Vec<crate::sprites::SpriteAnimation>,
    pub sprite_layers: std::collections::BTreeMap<String, u32>,
-    /// OptiFine's emissive block overlays: base sprite and overlay sprite names.
-    pub emissive: Vec<(String, String)>,
    pub translucent_layers: Vec<bool>,
    /// Each layer's `MipmapGenerator` settings.
    pub sprite_mips: Vec<crate::mipmap::Settings>,
-    /// The resource packs' LabPBR maps (normals, specular), layer by layer at `pbr_size`:
-    /// empty when they ship none.
-    pub pbr_normals: Vec<u8>,
-    pub pbr_specular: Vec<u8>,
-    pub pbr_size: u32,
-    /// OptiFine connected textures (empty without `optifine/ctm` files).
-    pub connected: crate::connected::ConnectedTextures,
-    /// Fusion connected textures (empty without Fusion's connecting textures and models).
-    pub fusion: crate::fusion::FusionTextures,
-    /// Counts up each time resources load, from 1: a native mod asks again where blocks'
-    /// sprites are when it changes (`native_block_sprites_version`).
-    pub generation: u64,
 }
-/// The last `RenderAssets::generation` handed out.
-static GENERATION: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(0);
 fn invalid(message: &str) -> io::Error {
    io::Error::new(io::ErrorKind::InvalidData, message)
 }
@@ -124,7 +108,8 @@ impl Assets {
        if manifest["data_version"].as_i64() != Some(i64::from(DATA_VERSION)) {
            return Err(invalid("resources do not match Horizon's pinned data version").into());
        }
-        let (registry, flags) = horizon_world::level::data::load_registry_with_flags(root)?;
+        let (registry, flags) =
+            BlockRegistry::from_facts_json_with_flags(File::open(root.join("facts.json"))?)?;
        let bundle: Value =
            serde_json::from_reader(BufReader::new(File::open(root.join("block-tags.json"))?))?;
        let mut definitions = TagDefinitions::default();
@@ -207,20 +192,6 @@ impl Assets {
    pub fn reload(&self, root: &Path) -> Result<RenderAssets> {
        RenderAssets::load(root, self)
    }
-    /// [`Assets::reload`] with the model library already parsed.
-    ///
-    /// Parsing it reads every model file under `assets/`, which needs no
-    /// block registry, so a caller that has the files to spare can start
-    /// it before `Assets::load` finishes and hand the result in here. On
-    /// a cold cache that is most of a second of reading moved off the
-    /// critical path.
-    pub fn reload_with_models(
-        &self,
-        root: &Path,
-        parsed: crate::model_library::ParsedModels,
-    ) -> Result<RenderAssets> {
-        RenderAssets::load_with_parsed(root, self, true, Some(parsed))
-    }
    /// [`Assets::reload`] for a server, which draws nothing: the sprites'
    /// layers, without the block or item models or the textures' pixels.
    pub fn reload_for_server(&self, root: &Path) -> Result<RenderAssets> {
@@ -232,16 +203,6 @@ impl RenderAssets {
        Self::load_with(root, assets, true)
    }
    fn load_with(root: &Path, assets: &Assets, draws: bool) -> Result<Self> {
-        Self::load_with_parsed(root, assets, draws, None)
-    }
-    /// `parsed`: the model library when a caller parsed it ahead of this
-    /// (see [`Assets::reload_with_models`]); otherwise it is parsed here.
-    fn load_with_parsed(
-        root: &Path,
-        assets: &Assets,
-        draws: bool,
-        parsed: Option<crate::model_library::ParsedModels>,
-    ) -> Result<Self> {
        let registry = assets.registry;
        let mut sprites = crate::sprites::Sprites::with_disk_cache(root);
        for name in MATERIALS {
@@ -249,24 +210,17 @@ impl RenderAssets {
        }
        // A server draws no block and no item: its block models (about 24 MB
        // baked) and item model library (7 MB) stay empty.
-        let parsed = match parsed {
-            Some(parsed) => parsed,
-            None if draws => {
-                let _step = crate::spans::startup::step("core.models_parse");
-                crate::model_library::ParsedModels::load(root)
-            }
-            None => crate::model_library::ParsedModels::default(),
+        let parsed = if draws {
+            crate::model_library::ParsedModels::load(root)
+        } else {
+            crate::model_library::ParsedModels::default()
        };
-        let mut models = if draws {
-            let _step = crate::spans::startup::step("core.models_bake");
+        let models = if draws {
            crate::models::prepare_with_models(root, registry, &mut sprites, &parsed)?
        } else {
            crate::models::PreparedModels::default()
        };
-        let model_library = {
-            let _step = crate::spans::startup::step("core.item_library");
-            parsed.into_item_library()
-        };
+        let model_library = parsed.into_item_library();
        // Fluids are drawn by the fluid renderer, not block models; breaking
        // progress uses the destroy-stage overlays.
        for name in [
@@ -281,46 +235,6 @@ impl RenderAssets {
        for stage in 0..10 {
            sprites.insert(root, &format!("minecraft:block/destroy_stage_{stage}"))?;
        }
-        let fusion = if draws {
-            let _step = crate::spans::startup::step("core.fusion");
-            crate::fusion::FusionTextures::load(root, registry, &mut sprites, &mut models.catalog)
-        } else {
-            Default::default()
-        };
-        let mut emissive = Vec::new();
-        let connected = if draws {
-            crate::native_emissive::load(root, &mut sprites);
-            // A side's sprite, for rules that connect by tile: the first quad facing it.
-            let catalog = &models.catalog;
-            let mut found = Vec::new();
-            crate::connected::ConnectedTextures::load(
-                root,
-                registry,
-                &mut sprites,
-                |state, face| {
-                    let side = horizon_assets::model::Direction::ALL[face as usize];
-                    catalog
-                        .models_at(
-                            state,
-                            horizon_core::position::BlockPos::new(0, 0, 0),
-                            &mut found,
-                        )
-                        .ok()?;
-                    found
-                        .iter()
-                        .flat_map(|m| &m.faces)
-                        .find(|f| f.quad.facing == side)
-                        .map(|f| f.layer)
-                },
-            )
-        } else {
-            Default::default()
-        };
-        // After the connected tiles: a tile identical to a block shares its layer, and the
-        // overlays skip shared layers.
-        if draws {
-            emissive = crate::native_emissive::load_optifine(root, &mut sprites);
-        }
        sprites.save_disk_cache();
        if draws {
            sprites.finish();
@@ -340,15 +254,8 @@ impl RenderAssets {
            model_gallery: models.states,
            animations: sprites.animations,
            sprite_layers: sprites.layers,
-            emissive,
            translucent_layers: sprites.translucent,
            sprite_mips: sprites.mips,
-            pbr_normals: sprites.normals,
-            pbr_specular: sprites.specular,
-            pbr_size: sprites.pbr_size,
-            connected,
-            fusion,
-            generation: GENERATION.fetch_add(1, std::sync::atomic::Ordering::Relaxed) + 1,
        })
    }
 }
@@ -180,16 +180,6 @@ pub fn list_textures(root: &Path) -> Vec<String> {
    for ns in namespaces.flatten() {
        let namespace = ns.file_name().to_string_lossy().into_owned();
        let base = ns.path().join("textures");
-        // A prepared root's: from its data file, without listing the disk.
-        if let Some(files) = horizon_core::prepared_files::files_under(&base) {
-            out.extend(
-                files
-                    .iter()
-                    .filter_map(|file| file.strip_suffix(".png"))
-                    .map(|rel| format!("{namespace}:{rel}")),
-            );
-            continue;
-        }
        let mut stack = vec![base.clone()];
        while let Some(dir) = stack.pop() {
            let Ok(entries) = fs::read_dir(&dir) else {
@@ -218,26 +208,10 @@ pub fn list_textures(root: &Path) -> Vec<String> {
    out.sort();
    out
 }
-/// The file of a texture identifier. A Custom Item Textures id (`cit_assets`) names its
-/// resource path, wherever the folder: `directory` is not used for it. An id whose path would
-/// leave the root (a pack's model may write any) names a file that is never there.
+/// The file of a texture identifier.
 pub fn texture_path(root: &Path, texture: &str, directory: &str) -> PathBuf {
-    // No file can have a NUL in its name, so this one is never there.
-    const NOWHERE: &str = "assets/minecraft/textures/horizon/\0refused.png";
-    if texture.starts_with("horizon_cit:") {
-        return root.join(
-            crate::cit_assets::resource(texture, "png")
-                .as_deref()
-                .unwrap_or(NOWHERE),
-        );
-    }
    let (namespace, path) = texture.split_once(':').unwrap_or(("minecraft", texture));
-    let rel = format!("assets/{namespace}/{directory}/{path}.png");
-    root.join(if horizon_optifine::paths::valid(&rel) {
-        &rel
-    } else {
-        NOWHERE
-    })
+    root.join(format!("assets/{namespace}/{directory}/{path}.png"))
 }

 /// `SpriteSourceList.list`: every sprite id of the atlas and its origin.
@@ -379,17 +353,14 @@ pub fn generate(
            let (_, _, key) = load(palette_key, "textures/palettes")?;
            let (_, _, target) = load(palette, "textures/palettes")?;
            let mut mapped = argb(&pixels);
-            let key = argb(&key);
-            let target = argb(&target);
-            apply_palette(&mut mapped, &key, &target)?;
-            let out: Vec<u8> = mapped
+            apply_palette(&mut mapped, &argb(&key), &argb(&target))?;
+            let out = mapped
                .iter()
                .flat_map(|p| {
                    let [a, r, g, b] = p.to_be_bytes();
                    [r, g, b, a]
                })
                .collect();
-            drop(mapped);
            Some((w, h, out))
        }
    }
@@ -61,8 +61,6 @@ struct Mixer {
    world_names: Vec<String>,
    /// The callback's cameras (position, basis, world), kept to be refilled without allocating.
    cameras: Vec<([f64; 3], Basis, u32)>,
-    /// Per-source gain/pan/step cache for one buffer, reused across callbacks.
-    voices: Vec<(ChannelId, [f32; 3], f64)>,
    limiter_peak: f32,
    /// The output device the stream was opened on (`Library.currentDeviceName`).
    #[cfg(feature = "audio")]
@@ -185,7 +183,6 @@ struct Decode {
    key: String,
    file: PathBuf,
    channel: ChannelId,
-    looping: bool,
 }
 /// Give a channel waiting on its sound the decoded samples and start it, as
 /// the buffer future attaching and playing the source. A source stopped or
@@ -423,7 +420,7 @@ impl Backend for MixerBackend {
        let key = format!("{namespace}:{path}");
        let cached = self.cache.lock().ok().and_then(|mut c| c.get(&key));
        if let Some(samples) = cached {
-            attach(&self.mixer, channel, samples, looping);
+            attach(&self.mixer, channel, samples, false);
            return;
        }
        let decoder = self.decoder.get_or_insert_with(|| {
@@ -442,18 +439,13 @@ impl Backend for MixerBackend {
                            }
                            samples
                        });
-                        attach(&mixer, job.channel, samples, job.looping);
+                        attach(&mixer, job.channel, samples, false);
                    }
                })
                .expect("sound decoder thread");
            send
        });
-        let _ = decoder.send(Decode {
-            key,
-            file,
-            channel,
-            looping,
-        });
+        let _ = decoder.send(Decode { key, file, channel });
    }
    /// `alSourceStop`: any state becomes stopped, an initial source too (a
    /// sound still decoding then never starts).
@@ -546,8 +538,9 @@ fn mix(mixer: &mut Mixer, data: &mut [f32], channels: usize, rate: u32) {
        (forward, up, right)
    };
    // Every camera hearing (splitscreen: the other players' too), in the mixer's own buffer.
-    mixer.cameras.clear();
-    mixer.cameras.extend(
+    let mut cameras = std::mem::take(&mut mixer.cameras);
+    cameras.clear();
+    cameras.extend(
        std::iter::once((
            0,
            (mixer.listener, mixer.listener_yaw, mixer.listener_pitch),
@@ -566,11 +559,10 @@ fn mix(mixer: &mut Mixer, data: &mut [f32], channels: usize, rate: u32) {
            )
        }),
    );
-    let shared = mixer.cameras.len() > 1;
+    let shared = cameras.len() > 1;
    let dot = |a: [f64; 3], b: [f64; 3]| (a[0] * b[0] + a[1] * b[1] + a[2] * b[2]) as f32;
    // Gains and pans per source for this buffer.
-    let mut voices = std::mem::take(&mut mixer.voices);
-    voices.clear();
+    let mut voices: Vec<(ChannelId, [f32; 3], f64)> = Vec::new();
    for (id, c) in &mixer.channels {
        let Some((_, source_rate)) = &c.samples else {
            continue;
@@ -588,8 +580,7 @@ fn mix(mixer: &mut Mixer, data: &mut [f32], channels: usize, rate: u32) {
        };
        let length = |d: [f64; 3]| d[0] * d[0] + d[1] * d[1] + d[2] * d[2];
        // The nearest camera hears it (one camera but in splitscreen).
-        let camera = mixer
-            .cameras
+        let camera = cameras
            .iter()
            .filter(|camera| c.relative || camera.2 == c.world)
            .min_by(|a, b| length(away(a.0)).total_cmp(&length(away(b.0))))
@@ -620,7 +611,8 @@ fn mix(mixer: &mut Mixer, data: &mut [f32], channels: usize, rate: u32) {
        let step = f64::from(*source_rate) / f64::from(rate) * f64::from(c.pitch.max(0.0));
        voices.push((*id, [left, right, gain], step));
    }
-    for (id, [left, right, gain], step) in voices.iter().copied() {
+    mixer.cameras = cameras;
+    for (id, [left, right, gain], step) in voices {
        let Some(c) = mixer.channels.get_mut(&id) else {
            continue;
        };
@@ -650,7 +642,6 @@ fn mix(mixer: &mut Mixer, data: &mut [f32], channels: usize, rate: u32) {
            c.position += step;
        }
    }
-    mixer.voices = voices;
    // Limit the whole buffer together, preserving waveform and stereo balance
    // instead of flattening each overloaded sample; release over 200 ms
    // (OpenAL Soft's output limiter, `ALC_OUTPUT_LIMITER_SOFT`, releases
@@ -1188,15 +1179,6 @@ impl Audio {
        self.sync_volumes();
        self.engine.tick(paused, ctx, &mut self.backend);
    }
-    /// The `uiSoundReserve` extra: positional sounds leave
-    /// `sound_engine::HEARD_RESERVE` static channels free (off: vanilla's pool).
-    pub fn set_listener_reserve(&mut self, on: bool) {
-        self.engine.listener_reserve = if on {
-            crate::sound_engine::HEARD_RESERVE
-        } else {
-            0
-        };
-    }
    /// `SoundManager.pauseAllExcept(MUSIC, UI)`.
    pub fn pause(&mut self) {
        self.engine.pause_all_except(
@@ -1215,13 +1197,8 @@ impl Audio {
    /// `SoundManager.reload` (resource packs changed): stop every sound, then
    /// read sound events and sound files from the new resource root.
    pub fn reload(&mut self, root: &Path) {
-        self.reload_with(root, SoundRegistry::load(root));
-    }
-    /// [`Self::reload`] with the root's sound events already read
-    /// (`SoundRegistry::load`, which a pack reload runs off the render thread).
-    pub fn reload_with(&mut self, root: &Path, registry: SoundRegistry) {
        self.stop_all();
-        self.engine.registry = registry;
+        self.engine.registry = SoundRegistry::load(root);
        self.backend.root = root.to_owned();
        let mut cache = self.backend.cache.lock().unwrap();
        cache.entries.clear();
@@ -1249,17 +1226,6 @@ impl Audio {
            self.play(event, Some(at), volume, pitch);
            return;
        }
-        self.play_after(
-            event,
-            at,
-            volume,
-            pitch,
-            (distance_sqr.sqrt() / 40.0 * 20.0) as i32,
-        );
-    }
-    /// `play` at a world position, starting `ticks` sound-engine ticks (20 a
-    /// second) from now: `SoundEngine.playDelayed`.
-    pub fn play_after(&mut self, event: &str, at: [f64; 3], volume: f32, pitch: f32, ticks: i32) {
        let seed = self.random.next_long();
        if let Some(capture) = self.capture.as_mut() {
            capture.push((event.to_owned(), at, volume, pitch));
@@ -1273,7 +1239,8 @@ impl Audio {
        let instance =
            SoundInstance::at(&event, source, volume, pitch, LegacyRandom::new(seed), at);
        let id = self.engine.add(instance, false);
-        self.engine.play_delayed(id, ticks);
+        self.engine
+            .play_delayed(id, (distance_sqr.sqrt() / 40.0 * 20.0) as i32);
    }
    /// `play` for this client only: a sound a packet's handler plays
    /// (`playLocalSound`), which the guests play from that packet themselves.
@@ -1369,13 +1336,6 @@ impl Audio {
        self.stop_instance(id);
        self.release(id);
    }
-    /// `SoundBufferLibrary.enumerate`: the decoded buffers kept and their bytes.
-    pub fn cache_stats(&self) -> (usize, usize) {
-        self.backend
-            .cache
-            .lock()
-            .map_or((0, 0), |c| (c.entries.len(), c.bytes))
-    }
    /// Every sound event id (for command completion).
    /// The engine's table sizes and the mixer's channels (`status`).
    pub fn census(&self) -> serde_json::Value {
@@ -101,22 +101,6 @@ impl AuthSession {
        let _ = std::fs::remove_file(path);
        Self::parse(&text.map_err(|e| format!("{}: {e}", path.display()))?)
    }
-    /// The access token's expiry (its JWT `exp`) has passed, or is a minute away: the session
-    /// service would refuse it. A token that doesn't read as a JWT counts as good: the server
-    /// says.
-    pub fn expired(&self) -> bool {
-        let exp = self
-            .access_token
-            .split('.')
-            .nth(1)
-            .and_then(|p| crate::skins::base64_decode(&p.replace('-', "+").replace('_', "/")))
-            .and_then(|json| serde_json::from_slice::<serde_json::Value>(&json).ok())
-            .and_then(|v| v.get("exp")?.as_u64());
-        let now = SystemTime::now()
-            .duration_since(SystemTime::UNIX_EPOCH)
-            .map_or(0, |d| d.as_secs());
-        exp.is_some_and(|exp| exp <= now + 60)
-    }
 }

 static CURRENT: OnceLock<Arc<AuthSession>> = OnceLock::new();
@@ -203,7 +187,6 @@ pub(crate) fn discovery() -> Result<Arc<serde_json::Value>, JoinError> {
    let doc: serde_json::Value = agent()
        .get(&discovery_url())
        .call()
-        .inspect_err(|e| log::warn!("The services discovery document: {e}"))
        .ok()
        .and_then(|r| r.into_string().ok())
        .and_then(|t| serde_json::from_str(&t).ok())
@@ -270,33 +253,9 @@ pub fn join_request(session: &AuthSession, server_hash: &str) -> String {
    .to_string()
 }

-/// A join that got no answer is worth one more try, as leaving and joining
-/// again would be: `join` is safe to repeat, it only records the server's
-/// hash. Any other answer is the service's own and stands.
-fn with_one_retry(
-    mut join: impl FnMut() -> Result<(), JoinError>,
-    pause: Duration,
-) -> Result<(), JoinError> {
-    match join() {
-        Err(JoinError::Unavailable) => {
-            std::thread::sleep(pause);
-            join()
-        }
-        result => result,
-    }
-}
-
 /// MinecraftServicesSessionService.joinServer: tell the session service this
-/// account is joining the server whose hash is `server_hash`. Horizon tries
-/// twice when the service doesn't answer; vanilla asks the player to.
+/// account is joining the server whose hash is `server_hash`.
 pub fn join_server(session: &AuthSession, server_hash: &str) -> Result<(), JoinError> {
-    with_one_retry(
-        || join_server_once(session, server_hash),
-        Duration::from_millis(500),
-    )
-}
-
-fn join_server_once(session: &AuthSession, server_hash: &str) -> Result<(), JoinError> {
    let doc = discovery()?;
    let url = endpoint(&doc, "session", "join").ok_or(JoinError::Unavailable)?;
    match agent()
@@ -305,218 +264,14 @@ fn join_server_once(session: &AuthSession, server_hash: &str) -> Result<(), Join
        .send_string(&join_request(session, server_hash))
    {
        Ok(_) => Ok(()),
-        Err(ureq::Error::Status(status, response)) => {
-            if status >= 500 {
-                log::warn!("The session service's join answered {status}");
-            }
-            Err(JoinError::from_response(
-                status,
-                &response.into_string().unwrap_or_default(),
-            ))
-        }
-        Err(ureq::Error::Transport(e)) => {
-            log::warn!("The session service's join: {e}");
-            Err(JoinError::Unavailable)
-        }
+        Err(ureq::Error::Status(status, response)) => Err(JoinError::from_response(
+            status,
+            &response.into_string().unwrap_or_default(),
+        )),
+        Err(ureq::Error::Transport(_)) => Err(JoinError::Unavailable),
    }
 }

-/// The account's chat key pair (ProfileKeyPair): the private key that signs
-/// its chat, the public key with the services' signature over it, and when
-/// to fetch a new one (refreshedAfter, epoch milliseconds). Like the access
-/// token it stays in memory: vanilla's profilekeys file is never written.
-pub struct ChatKeyPair {
-    pub private: horizon_protocol::rsa::RsaPrivateKey,
-    pub public: horizon_protocol::secure_chat::ProfileKey,
-    pub refreshed_after: i64,
-}
-impl std::fmt::Debug for ChatKeyPair {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("ChatKeyPair")
-            .field("expires_at", &self.public.expires_at)
-            .field("refreshed_after", &self.refreshed_after)
-            .finish_non_exhaustive()
-    }
-}
-impl ChatKeyPair {
-    /// ProfileKeyPair.dueRefresh.
-    pub fn due_refresh(&self, now: i64) -> bool {
-        self.refreshed_after < now
-    }
-}
-
-/// Epoch milliseconds now.
-pub fn now_millis() -> i64 {
-    SystemTime::now()
-        .duration_since(SystemTime::UNIX_EPOCH)
-        .map_or(0, |d| d.as_millis() as i64)
-}
-
-/// Instant.parse for the services' UTC times
-/// (`2022-07-30T23:05:24.548227Z`): epoch milliseconds.
-pub fn parse_instant(text: &str) -> Option<i64> {
-    let text = text.strip_suffix('Z')?;
-    let (date, time) = text.split_once('T')?;
-    let mut date = date.splitn(3, '-').map(|p| p.parse::<i64>().ok());
-    let (y, m, d) = (date.next()??, date.next()??, date.next()??);
-    let (hms, fraction) = time.split_once('.').unwrap_or((time, ""));
-    let mut hms = hms.splitn(3, ':').map(|p| p.parse::<i64>().ok());
-    let (h, min, s) = (hms.next()??, hms.next()??, hms.next()??);
-    if !(1..=12).contains(&m) || !(1..=31).contains(&d) || h > 23 || min > 59 || s > 60 {
-        return None;
-    }
-    if !fraction.bytes().all(|b| b.is_ascii_digit()) {
-        return None;
-    }
-    let millis = format!("{fraction:0<3}")[..3].parse::<i64>().ok()?;
-    // Days from 1970-01-01 (Howard Hinnant's days_from_civil).
-    let y = if m <= 2 { y - 1 } else { y };
-    let era = y.div_euclid(400);
-    let yoe = y - era * 400;
-    let doy = (153 * (m + if m > 2 { -3 } else { 9 }) + 2) / 5 + d - 1;
-    let doe = yoe * 365 + yoe / 4 - yoe / 100 + doy;
-    let days = era * 146_097 + doe - 719_468;
-    Some(((days * 24 + h) * 60 + min) * 60_000 + s * 1000 + millis)
-}
-
-/// Crypt.stringToPemRsaPrivateKey / stringToRsaPublicKey: the base64
-/// between a PEM block's armour lines.
-fn pem_der(pem: &str) -> Option<Vec<u8>> {
-    let body: String = pem
-        .lines()
-        .filter(|l| !l.starts_with("-----"))
-        .flat_map(|l| l.chars().filter(|c| !c.is_whitespace()))
-        .collect();
-    crate::skins::base64_decode(&body)
-}
-
-/// KeyPairResponse from the certificates endpoint, as
-/// AccountProfileKeyPairManager.fetchProfileKeyPair reads it: the PEM key
-/// pair, publicKeySignatureV2 (the signature over the profile id too),
-/// expiresAt and refreshedAfter. None for anything malformed, or a private
-/// key that isn't the public key's other half.
-pub fn parse_certificates(body: &str) -> Option<ChatKeyPair> {
-    use horizon_protocol::rsa::{RsaPrivateKey, RsaPublicKey};
-    let v: serde_json::Value = serde_json::from_str(body).ok()?;
-    let field = |path: &str| v.pointer(path).and_then(|s| s.as_str());
-    let private = RsaPrivateKey::from_der(&pem_der(field("/keyPair/privateKey")?)?).ok()?;
-    let key = pem_der(field("/keyPair/publicKey")?)?;
-    if RsaPublicKey::from_der(&key).ok()? != private.public {
-        return None;
-    }
-    let signature = crate::skins::base64_decode(field("/publicKeySignatureV2")?)?;
-    Some(ChatKeyPair {
-        private,
-        public: horizon_protocol::secure_chat::ProfileKey {
-            expires_at: parse_instant(field("/expiresAt")?)?,
-            key,
-            signature,
-        },
-        refreshed_after: parse_instant(field("/refreshedAfter")?)?,
-    })
-}
-
-/// UserApiService.getKeyPair: the certificates endpoint, POSTed with the
-/// access token.
-pub fn fetch_chat_keys(session: &AuthSession) -> Result<ChatKeyPair, JoinError> {
-    let doc = discovery()?;
-    let url = endpoint(&doc, "player", "getCertificates").ok_or(JoinError::Unavailable)?;
-    let body = match agent()
-        .post(&url)
-        .set("Authorization", &format!("Bearer {}", session.access_token))
-        .set("Content-Type", "application/json; charset=utf-8")
-        .send_string("")
-    {
-        Ok(response) => response.into_string().unwrap_or_default(),
-        Err(ureq::Error::Status(status, response)) => {
-            return Err(JoinError::from_response(
-                status,
-                &response.into_string().unwrap_or_default(),
-            ));
-        }
-        Err(ureq::Error::Transport(_)) => return Err(JoinError::Unavailable),
-    };
-    parse_certificates(&body)
-        .ok_or_else(|| JoinError::Other("Malformed profile key pair response".to_owned()))
-}
-
-/// AccountProfileKeyPairManager.MINIMUM_PROFILE_KEY_REFRESH_INTERVAL.
-const KEY_RETRY: Duration = Duration::from_secs(60 * 60);
-
-/// The chat key pair as AccountProfileKeyPairManager keeps it: fetched on a
-/// background thread, kept until it is due a refresh, and on a failure kept
-/// as it was (the next try waits an hour, or the next join).
-#[derive(Default)]
-struct ChatKeys {
-    current: Option<Arc<ChatKeyPair>>,
-    fetching: bool,
-    next_try: Option<std::time::Instant>,
-}
-static CHAT_KEYS: std::sync::LazyLock<Mutex<std::collections::HashMap<u128, ChatKeys>>> =
-    std::sync::LazyLock::new(|| Mutex::new(std::collections::HashMap::new()));
-
-/// prepareKeyPair (`now`: on a join) or, from a tick, shouldRefreshKeyPair
-/// then prepareKeyPair: start fetching when there is no key pair or it is
-/// due a refresh. Nothing without a signed-in account.
-pub fn prepare_chat_keys(now: bool) {
-    let Some(session) = current() else {
-        return;
-    };
-    prepare_chat_keys_for(session, now);
-}
-
-/// Prepare keys for this player, independently of the other local accounts.
-pub fn prepare_chat_keys_for(session: Arc<AuthSession>, now: bool) {
-    let uuid = session.uuid;
-    let mut accounts = CHAT_KEYS.lock().unwrap();
-    let keys = accounts.entry(uuid).or_default();
-    let instant = std::time::Instant::now();
-    if keys.fetching || !now && keys.next_try.is_some_and(|t| instant < t) {
-        return;
-    }
-    keys.next_try = Some(instant + KEY_RETRY);
-    if keys
-        .current
-        .as_ref()
-        .is_some_and(|k| !k.due_refresh(now_millis()))
-    {
-        return;
-    }
-    keys.fetching = true;
-    drop(accounts);
-    let spawned = std::thread::Builder::new()
-        .name("Profile key fetch".into())
-        .spawn(move || {
-            let result = fetch_chat_keys(&session);
-            let mut accounts = CHAT_KEYS.lock().unwrap();
-            let keys = accounts.entry(uuid).or_default();
-            keys.fetching = false;
-            match result {
-                Ok(pair) => keys.current = Some(Arc::new(pair)),
-                Err(e) => log::error!("Failed to retrieve profile key pair: {e:?}"),
-            }
-        });
-    if spawned.is_err() {
-        CHAT_KEYS.lock().unwrap().entry(uuid).or_default().fetching = false;
-    }
-}
-
-/// The chat key pair fetched so far, unless it has expired.
-pub fn chat_keys() -> Option<Arc<ChatKeyPair>> {
-    chat_keys_for(current()?.uuid)
-}
-
-/// This account's key pair; another local player's keys can never be returned.
-pub fn chat_keys_for(uuid: u128) -> Option<Arc<ChatKeyPair>> {
-    CHAT_KEYS
-        .lock()
-        .unwrap()
-        .get(&uuid)?
-        .current
-        .clone()
-        .filter(|k| !k.public.has_expired(now_millis()))
-}
-
 const MINECRAFT_PROFILE: &str = "https://api.minecraftservices.com/minecraft/profile";

 /// The signed-in account's active skin and cape from `GET /minecraft/profile`.
@@ -623,77 +378,6 @@ mod tests {

    const UUID: u128 = 0x069a79f444e94726a5befca90e38aaf5;

-    /// Runs `with_one_retry` over these answers, in order: the result and how
-    /// many it asked for.
-    fn joined(answers: &[Result<(), JoinError>]) -> (Result<(), JoinError>, usize) {
-        let mut asked = 0;
-        let result = with_one_retry(
-            || {
-                asked += 1;
-                answers[asked - 1].clone()
-            },
-            Duration::ZERO,
-        );
-        (result, asked)
-    }
-
-    #[test]
-    fn a_join_with_no_answer_is_tried_once_more() {
-        let none = Err(JoinError::Unavailable);
-        assert_eq!(joined(&[none.clone(), Ok(())]), (Ok(()), 2));
-        // Twice without an answer: the message the player knows.
-        assert_eq!(joined(&[none.clone(), none.clone()]), (none, 2));
-    }
-
-    #[test]
-    fn a_join_the_service_answered_is_not_tried_again() {
-        assert_eq!(joined(&[Ok(())]), (Ok(()), 1));
-        for refused in [
-            JoinError::InvalidSession,
-            JoinError::Banned,
-            JoinError::InsufficientPrivileges,
-            JoinError::Other("Status: 429".into()),
-        ] {
-            assert_eq!(joined(&[Err(refused.clone())]), (Err(refused), 1));
-        }
-    }
-
-    /// base64url without padding, as a JWT's parts are.
-    fn base64url(bytes: &[u8]) -> String {
-        const ALPHABET: &[u8; 64] =
-            b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
-        let mut out = String::new();
-        for chunk in bytes.chunks(3) {
-            let n =
-                chunk.iter().fold(0u32, |n, &b| n << 8 | u32::from(b)) << (8 * (3 - chunk.len()));
-            for k in 0..=chunk.len() {
-                out.push(char::from(ALPHABET[(n >> (18 - 6 * k) & 63) as usize]));
-            }
-        }
-        out
-    }
-
-    #[test]
-    fn a_token_past_its_exp_is_expired() {
-        // header.payload.signature, the payload base64url without padding.
-        let token = |exp: u64| {
-            let json = format!(r#"{{"exp":{exp}}}"#);
-            let payload = base64url(json.as_bytes());
-            AuthSession::new("Ann", UUID, &format!("e30.{payload}.sig"))
-        };
-        let now = SystemTime::now()
-            .duration_since(SystemTime::UNIX_EPOCH)
-            .unwrap()
-            .as_secs();
-        assert!(token(now - 10).expired());
-        assert!(
-            token(now + 30).expired(),
-            "a minute from its end: as good as gone"
-        );
-        assert!(!token(now + 3600).expired());
-        assert!(!AuthSession::new("Ann", UUID, "not-a-jwt").expired());
-    }
-
    fn write(dir: &Path, text: &str, mode: u32) -> std::path::PathBuf {
        let path = dir.join("session.json");
        std::fs::write(&path, text).unwrap();
@@ -801,135 +485,6 @@ mod tests {
        );
    }

-    #[test]
-    fn instants_like_java() {
-        assert_eq!(parse_instant("1970-01-01T00:00:00Z"), Some(0));
-        assert_eq!(parse_instant("1970-01-01T00:00:01.5Z"), Some(1500));
-        // Instant.parse("2022-07-30T23:05:24.548227Z").toEpochMilli().
-        assert_eq!(
-            parse_instant("2022-07-30T23:05:24.548227Z"),
-            Some(1_659_222_324_548)
-        );
-        assert_eq!(
-            parse_instant("2024-02-29T12:00:00Z"),
-            Some(1_709_208_000_000)
-        );
-        assert_eq!(parse_instant("1969-12-31T23:59:59Z"), Some(-1000));
-        for bad in [
-            "2022-07-30T23:05:24",
-            "2022-13-01T00:00:00Z",
-            "2022-07-30 23:05:24Z",
-            "2022-07-30T23:05:24.5x1Z",
-            "",
-        ] {
-            assert_eq!(parse_instant(bad), None, "{bad}");
-        }
-    }
-
-    /// A throwaway 1024-bit key (`openssl genrsa`, PKCS#8 as the services
-    /// send it under "RSA PRIVATE KEY") and its public half.
-    const PRIVATE_B64: &str = "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";
-    const PUBLIC_B64: &str = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkg6mizhdi7beLc1m5ZBXjWIXbLOuwYV02zjFGI6XD3bX+HczbYGbE3+FhJbr3PKSLRlgoXaat8czwvRi+D2fjodaOlUf8EpttP+dEE+1fmHEj9Va1Sow6Q0oP1KAtRZnXP72/QDvCKe08bkWHf7sqIP04UPGhnFrb77cD6seF6wIDAQAB";
-
-    fn pem(label: &str, b64: &str) -> String {
-        let lines: Vec<&str> = b64
-            .as_bytes()
-            .chunks(76)
-            .map(|c| std::str::from_utf8(c).unwrap())
-            .collect();
-        format!(
-            "-----BEGIN {label}-----\n{}\n-----END {label}-----\n",
-            lines.join("\n")
-        )
-    }
-
-    fn certificates(private: &str, public: &str) -> String {
-        serde_json::json!({
-            "keyPair": {
-                "privateKey": pem("RSA PRIVATE KEY", private),
-                "publicKey": pem("RSA PUBLIC KEY", public),
-            },
-            "publicKeySignature": "djE=",
-            "publicKeySignatureV2": "c2ln",
-            "expiresAt": "2022-07-30T23:05:24.548227Z",
-            "refreshedAfter": "2022-07-30T15:05:24.548227Z",
-        })
-        .to_string()
-    }
-
-    #[test]
-    fn local_accounts_use_their_own_chat_keys() {
-        let pair = |signature: &[u8]| {
-            let mut keys = parse_certificates(&certificates(PRIVATE_B64, PUBLIC_B64)).unwrap();
-            keys.public.expires_at = i64::MAX;
-            keys.refreshed_after = i64::MAX;
-            keys.public.signature = signature.to_vec();
-            Arc::new(keys)
-        };
-        let ann = pair(b"ann");
-        let bea = pair(b"bea");
-        {
-            let mut accounts = CHAT_KEYS.lock().unwrap();
-            for (uuid, keys) in [(101, ann.clone()), (102, bea.clone())] {
-                accounts.insert(
-                    uuid,
-                    ChatKeys {
-                        current: Some(keys),
-                        ..Default::default()
-                    },
-                );
-            }
-        }
-        prepare_chat_keys_for(Arc::new(AuthSession::new("Ann", 101, "unused")), true);
-        assert!(Arc::ptr_eq(&chat_keys_for(101).unwrap(), &ann));
-        assert!(Arc::ptr_eq(&chat_keys_for(102).unwrap(), &bea));
-        assert!(chat_keys_for(103).is_none());
-        CHAT_KEYS.lock().unwrap().remove(&101);
-        CHAT_KEYS.lock().unwrap().remove(&102);
-    }
-
-    #[test]
-    fn certificates_response() {
-        let pair = parse_certificates(&certificates(PRIVATE_B64, PUBLIC_B64)).unwrap();
-        assert_eq!(
-            pair.public.key,
-            crate::skins::base64_decode(PUBLIC_B64).unwrap()
-        );
-        assert_eq!(pair.public.signature, b"sig", "publicKeySignatureV2");
-        assert_eq!(pair.public.expires_at, 1_659_222_324_548);
-        assert_eq!(pair.refreshed_after, 1_659_193_524_548);
-        assert_eq!(pair.private.public_der(), pair.public.key);
-        assert!(pair.due_refresh(1_659_193_524_549));
-        assert!(!pair.due_refresh(1_659_193_524_548));
-        assert!(!format!("{pair:?}").contains("MII"));
-        // A public key that isn't the private key's, and broken fields.
-        let other = horizon_protocol::rsa::RsaPrivateKey::generate(1024).unwrap();
-        let other = base64(&other.public_der());
-        assert!(parse_certificates(&certificates(PRIVATE_B64, &other)).is_none());
-        assert!(parse_certificates(&certificates("bm9wZQ==", PUBLIC_B64)).is_none());
-        assert!(parse_certificates("{}").is_none());
-        assert!(parse_certificates("").is_none());
-    }
-
-    fn base64(bytes: &[u8]) -> String {
-        const A: &[u8] = b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-        let mut out = String::new();
-        for c in bytes.chunks(3) {
-            let n = c
-                .iter()
-                .enumerate()
-                .fold(0u32, |n, (i, &b)| n | u32::from(b) << (16 - 8 * i));
-            for i in 0..4 {
-                out.push(if i <= c.len() {
-                    char::from(A[(n >> (18 - 6 * i) & 63) as usize])
-                } else {
-                    '='
-                });
-            }
-        }
-        out
-    }
-
    #[test]
    fn discovery_endpoints() {
        let doc = serde_json::json!({"discovery": {"session": {"endpoints": {"join": {"uri": "https://s/join"}}}}});
@@ -5,6 +5,7 @@ use horizon_core::{noise::SimplexNoise, position::BlockPos, random::LegacyRandom
 use serde_json::Value;
 use std::{
    collections::{BTreeMap, HashMap},
+    fs,
    path::Path,
    sync::Arc,
 };
@@ -170,10 +171,7 @@ fn color(v: &Value) -> Option<u32> {
 }
 fn colormap(root: &Path, name: &str) -> Result<Vec<u32>> {
    let path = root.join(format!("assets/minecraft/textures/colormap/{name}.png"));
-    let mut decoder = png::Decoder::new(std::io::Cursor::new(horizon_core::prepared_files::read(
-        &path,
-    )?));
-    decoder.ignore_checksums(true);
+    let mut decoder = png::Decoder::new(std::io::BufReader::new(fs::File::open(path)?));
    decoder.set_transformations(png::Transformations::EXPAND | png::Transformations::STRIP_16);
    let mut reader = decoder.read_info()?;
    let mut bytes = vec![0; reader.output_buffer_size().ok_or("colormap too large")?];
@@ -278,22 +276,21 @@ impl Biomes {
            dry: colormap(root, "dry_foliage")?,
        };
        let mut list = Vec::new();
-        // The folder's own files (not its subfolders'), by file name: through `json_folder`,
-        // from the prepared data file when there is one.
-        let folder = horizon_world::json_folder::read(&root.join("data/minecraft/worldgen/biome"))?;
-        let mut files: Vec<_> = folder
-            .files
-            .iter()
-            .filter(|f| !f.name.contains('/'))
+        let mut names: Vec<_> = fs::read_dir(root.join("data/minecraft/worldgen/biome"))?
+            .filter_map(|e| e.ok())
+            .map(|e| e.path())
+            .filter(|p| p.extension().is_some_and(|e| e == "json"))
            .collect();
-        files.sort_by_cached_key(|f| format!("{}.json", f.name));
-        for file in files {
-            let v: Value = serde_json::from_slice(file.bytes()?)?;
-            list.push(BiomeInfo::from_json(
-                format!("minecraft:{}", file.name),
-                &v,
-                &maps,
-            ));
+        names.sort();
+        for path in names {
+            let name = format!(
+                "minecraft:{}",
+                path.file_stem()
+                    .and_then(|s| s.to_str())
+                    .ok_or("bad biome")?
+            );
+            let v: Value = serde_json::from_slice(&fs::read(&path)?)?;
+            list.push(BiomeInfo::from_json(name, &v, &maps));
        }
        let index = list
            .iter()
@@ -390,71 +387,6 @@ impl Biomes {
    }
 }

-/// A biome's colours as a mod may change them (`native_biome_colors`), each
-/// 0xRRGGBB: what tints grass (before the dark forest's modifier; the swamp's
-/// noise colours replace it), leaves and vines, dry foliage (leaf litter) and
-/// water.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub struct BiomeColors {
-    pub grass: u32,
-    pub foliage: u32,
-    pub dry_foliage: u32,
-    pub water: u32,
-}
-
-impl Biomes {
-    /// This table with each biome's colours passed through `f`, given the
-    /// biome's name (`minecraft:plains`) and its colours; None when `f`
-    /// changed none. Bits past 0xFFFFFF are dropped.
-    pub fn with_colors(&self, mut f: impl FnMut(&str, &mut BiomeColors)) -> Option<Self> {
-        let mut out = self.clone();
-        let mut changed = false;
-        for b in &mut out.list {
-            let before = BiomeColors {
-                grass: b.grass,
-                foliage: b.foliage,
-                dry_foliage: b.dry_foliage,
-                water: b.water,
-            };
-            let mut colors = before;
-            f(&b.name, &mut colors);
-            let after = BiomeColors {
-                grass: colors.grass & 0xFF_FFFF,
-                foliage: colors.foliage & 0xFF_FFFF,
-                dry_foliage: colors.dry_foliage & 0xFF_FFFF,
-                water: colors.water & 0xFF_FFFF,
-            };
-            if after != before {
-                changed = true;
-                b.grass = after.grass;
-                b.foliage = after.foliage;
-                b.dry_foliage = after.dry_foliage;
-                b.water = after.water;
-            }
-        }
-        changed.then_some(out)
-    }
-
-    /// This table (the biome files') with its colours passed through `f`, when
-    /// they differ from `current`'s: what a refresh of a table already
-    /// coloured by `f` once must not compound.
-    pub fn recolored_from(
-        &self,
-        current: &Self,
-        f: impl FnMut(&str, &mut BiomeColors),
-    ) -> Option<Self> {
-        let out = self.with_colors(f).unwrap_or_else(|| self.clone());
-        let tints = |b: &BiomeInfo| (b.grass, b.foliage, b.dry_foliage, b.water);
-        let same = out.list.len() == current.list.len()
-            && out
-                .list
-                .iter()
-                .zip(&current.list)
-                .all(|(a, b)| tints(a) == tints(b));
-        (!same).then_some(out)
-    }
-}
-
 /// A 24-bit colour as sRGB components in 0..1.
 pub fn rgb(c: u32) -> [f32; 3] {
    [16, 8, 0].map(|shift| (c >> shift & 255) as f32 / 255.0)
@@ -602,81 +534,6 @@ mod pack_tests {
    }
 }

-#[cfg(test)]
-mod color_tests {
-    use super::*;
-    use serde_json::json;
-
-    fn biomes() -> Biomes {
-        let maps = Colormaps {
-            grass: Vec::new(),
-            foliage: Vec::new(),
-            dry: Vec::new(),
-        };
-        let effects = |grass: u32, modifier: &str| {
-            json!({"effects": {"grass_color": grass, "foliage_color": 0x112233,
-                "dry_foliage_color": 0x445566, "water_color": 0x3F76E4,
-                "grass_color_modifier": modifier}})
-        };
-        let list = vec![
-            BiomeInfo::from_json("minecraft:plains".into(), &effects(0x91BD59, "none"), &maps),
-            BiomeInfo::from_json(
-                "minecraft:dark_forest".into(),
-                &effects(0x91BD59, "dark_forest"),
-                &maps,
-            ),
-        ];
-        Biomes {
-            builtin: Arc::new(list.clone()),
-            index: list
-                .iter()
-                .enumerate()
-                .map(|(i, b)| (b.name.clone(), i as u16))
-                .collect(),
-            list,
-            info_noise: SimplexNoise::with_skipped_offsets(&mut LegacyRandom::new(2345), true),
-            colormaps: Arc::new(maps),
-            packs: BTreeMap::new(),
-        }
-    }
-
-    #[test]
-    fn a_change_reaches_the_tints_the_mesher_reads() {
-        let autumn = biomes()
-            .with_colors(|name, c| {
-                c.foliage = 0xD2691E;
-                if name == "minecraft:plains" {
-                    c.grass = 0xBFA055;
-                }
-            })
-            .expect("changed");
-        let plains = autumn.id("minecraft:plains");
-        assert_eq!(autumn.grass(plains, 0.0, 0.0), 0xBFA055);
-        assert_eq!(autumn.get(plains).foliage, 0xD2691E);
-        assert_eq!(autumn.get(plains).dry_foliage, 0x445566);
-        assert_eq!(autumn.get(plains).water, 0x3F76E4);
-        // The dark forest's modifier still darkens its (unchanged) grass:
-        // ((0x91BD59 & 0xFEFEFE) + 0x28340A) >> 1.
-        let dark = autumn.id("minecraft:dark_forest");
-        assert_eq!(autumn.grass(dark, 0.0, 0.0), 0x5C7831);
-        assert_eq!(autumn.get(dark).foliage, 0xD2691E);
-    }
-
-    #[test]
-    fn no_change_gives_none_and_alpha_bits_are_dropped() {
-        assert!(biomes().with_colors(|_, _| {}).is_none());
-        assert!(
-            biomes()
-                .with_colors(|_, c| c.water |= 0xFF00_0000)
-                .is_none()
-        );
-        let blue = biomes()
-            .with_colors(|_, c| c.water = 0xFF00_00FF)
-            .expect("changed");
-        assert_eq!(blue.get(0).water, 0x0000FF);
-    }
-}
-
 #[cfg(test)]
 mod blend_tests {
    use super::*;
@@ -1,306 +0,0 @@
-//! Bulk block edits: runs of blocks up columns written straight into the
-//! resident sections, a section unpacked and packed once however many of its
-//! blocks change, instead of a `World::set` per block. Nothing round them is
-//! told (as `fill ... strict`); the light of each chunk changed is worked out
-//! again whole, off the game thread, rather than block by block, and each
-//! section changed is remeshed once.
-use crate::chunk::index;
-use crate::fast_hash::FxHashMap;
-use crate::world::World;
-
-/// A run of one column, resolved: blocks `y0..=y1` of column (x, z) set to
-/// `state` where filter `only` (if any) passes the block there.
-#[derive(Clone, Copy, Debug, PartialEq)]
-pub struct Run {
-    pub x: i32,
-    pub z: i32,
-    pub y0: i32,
-    pub y1: i32,
-    pub state: u32,
-    pub only: Option<u16>,
-}
-
-/// What an edit changed.
-#[derive(Debug, Default)]
-pub struct Outcome {
-    /// Blocks changed.
-    pub changed: u64,
-    /// Chunks with a change.
-    pub chunks: usize,
-    /// Changes of the states `tracked` asked for (block entities, watched
-    /// blocks): position, previous and new state.
-    pub tracked: Vec<((i32, i32, i32), u32, u32)>,
-}
-
-/// Per state answers, worked out once each.
-struct Memo(Vec<u8>);
-impl Memo {
-    #[inline]
-    fn get(&mut self, state: u32, ask: impl FnOnce(u32) -> bool) -> bool {
-        let i = state as usize;
-        if i >= self.0.len() {
-            self.0.resize(i + 1, 0);
-        }
-        if self.0[i] == 0 {
-            self.0[i] = 1 + u8::from(ask(state));
-        }
-        self.0[i] == 2
-    }
-}
-
-impl World {
-    /// Make `runs` in order, each seeing the changes of those before it.
-    /// `matches(filter, state)` says whether a filter passes a state, and
-    /// `tracked(state)` whether its changes are reported; each is asked once
-    /// per state. Runs in unloaded chunks and the parts of runs outside each
-    /// chunk's own column (`Chunk::layout`) are left out.
-    ///
-    /// Unlike `World::set`, this records nothing per block: no
-    /// `block_entities.state_changed` (a caller adds or removes block
-    /// entities itself, from `Outcome::tracked`), no `watched_writes` (ask
-    /// for those states through `tracked`), no `block_log` entry (the chunk
-    /// goes in `bulk_log` instead, sent whole), no `path_writes` (mobs'
-    /// paths are not recomputed for these blocks) and no `light_edits` (the
-    /// chunk and its neighbours are lit again whole, through `dirty_light`).
-    pub fn edit_runs(
-        &mut self,
-        runs: &[Run],
-        mut matches: impl FnMut(u16, u32) -> bool,
-        mut tracked: impl FnMut(u32) -> bool,
-    ) -> Outcome {
-        let mut out = Outcome::default();
-        // the runs of each chunk, in order, and the chunks in the order they were first named
-        let mut by_chunk: FxHashMap<(i32, i32), Vec<u32>> = FxHashMap::default();
-        let mut order = Vec::new();
-        for (i, r) in runs.iter().enumerate() {
-            if r.y1 < r.y0 {
-                continue;
-            }
-            let key = (r.x >> 4, r.z >> 4);
-            by_chunk
-                .entry(key)
-                .or_insert_with(|| {
-                    order.push(key);
-                    Vec::new()
-                })
-                .push(i as u32);
-        }
-        let mut filter_memo: Vec<Memo> = Vec::new();
-        let mut tracked_memo = Memo(Vec::new());
-        let mut values: Vec<Option<Box<[u32; 4096]>>> = Vec::new();
-        let mut changed: Vec<bool> = Vec::new();
-        for key in order {
-            let Some(chunk) = self.chunks.get(&key) else {
-                continue;
-            };
-            let (min_y, sections) = (chunk.min_y(), chunk.sections.len());
-            let max_y = chunk.max_y();
-            let list = &by_chunk[&key];
-            changed.clear();
-            changed.resize(sections, false);
-            values.clear();
-            values.resize_with(sections, || None);
-            let mut any = 0u64;
-            for &i in list {
-                let r = runs[i as usize];
-                let (lx, lz) = (r.x & 15, r.z & 15);
-                let (y0, y1) = (r.y0.max(min_y), r.y1.min(max_y - 1));
-                let mut y = y0;
-                while y <= y1 {
-                    let s = ((y - min_y) >> 4) as usize;
-                    let top = (min_y + (s as i32 + 1) * 16 - 1).min(y1);
-                    let vals = values[s].get_or_insert_with(|| {
-                        let mut v = Box::new([0u32; 4096]);
-                        chunk.sections[s].unpack(&mut v);
-                        v
-                    });
-                    for yy in y..=top {
-                        let at = index(lx, yy, lz);
-                        let old = vals[at];
-                        if old == r.state {
-                            continue;
-                        }
-                        if let Some(f) = r.only {
-                            let f = f as usize;
-                            if filter_memo.len() <= f {
-                                filter_memo.resize_with(f + 1, || Memo(Vec::new()));
-                            }
-                            if !filter_memo[f].get(old, |s| matches(f as u16, s)) {
-                                continue;
-                            }
-                        }
-                        vals[at] = r.state;
-                        changed[s] = true;
-                        any += 1;
-                        if tracked_memo.get(old, &mut tracked)
-                            || tracked_memo.get(r.state, &mut tracked)
-                        {
-                            out.tracked.push(((r.x, yy, r.z), old, r.state));
-                        }
-                    }
-                    y = top + 1;
-                }
-            }
-            if any == 0 {
-                continue;
-            }
-            out.changed += any;
-            out.chunks += 1;
-            let chunk =
-                std::sync::Arc::make_mut(self.chunks.get_mut(&key).expect("looked up above"));
-            for s in 0..sections {
-                if changed[s]
-                    && let Some(v) = &values[s]
-                {
-                    chunk.replace_blocks(s, v);
-                }
-            }
-            self.revision = self.revision.wrapping_add(1);
-            self.modified.insert(key);
-            if self.block_log.is_some() {
-                self.bulk_log.insert(key);
-            }
-            // remeshed once (with the neighbours whose faces and light it touches), lit again whole
-            for (s, _) in changed.iter().enumerate().filter(|c| *c.1) {
-                for ds in -1..=1 {
-                    let sy = s as i32 + ds;
-                    if !(0..sections as i32).contains(&sy) {
-                        continue;
-                    }
-                    for dz in -1..=1 {
-                        for dx in -1..=1 {
-                            self.dirty_sections.insert((key.0 + dx, sy, key.1 + dz));
-                        }
-                    }
-                }
-            }
-            for dz in -1..=1 {
-                for dx in -1..=1 {
-                    self.dirty_light.insert((key.0 + dx, key.1 + dz));
-                }
-            }
-        }
-        out
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::chunk::Chunk;
-    use horizon_world::registry::BlockStateId;
-    use std::sync::Arc;
-
-    fn world() -> World {
-        let mut w = World::new(BlockStateId(0), 0);
-        for cz in -1..=1 {
-            for cx in -1..=1 {
-                w.chunks.insert((cx, cz), Arc::new(Chunk::empty(cx, cz)));
-            }
-        }
-        // stone up to y 63
-        for z in -16..32 {
-            for x in -16..32 {
-                for y in -64..64 {
-                    w.set(x, y, z, BlockStateId(1)).unwrap();
-                }
-            }
-        }
-        w.dirty_light.clear();
-        w.dirty_sections.clear();
-        w.block_log = Some(Vec::new());
-        w
-    }
-    fn run(x: i32, z: i32, y0: i32, y1: i32, state: u32, only: Option<u16>) -> Run {
-        Run {
-            x,
-            z,
-            y0,
-            y1,
-            state,
-            only,
-        }
-    }
-
-    #[test]
-    fn runs_change_their_blocks_in_order() {
-        let mut w = world();
-        let runs = [
-            run(3, 4, 10, 40, 0, None),
-            run(3, 4, 10, 12, 5, None),
-            // only where it is air: over the stone, and the three blocks of 5 stay
-            run(3, 4, 0, 80, 7, Some(0)),
-            run(-1, 20, -70, 400, 9, None),
-        ];
-        let out = w.edit_runs(&runs, |_, s| s == 0, |_| false);
-        assert_eq!(w.block(3, 9, 4).0, 1);
-        assert_eq!(w.block(3, 11, 4).0, 5);
-        assert_eq!(w.block(3, 13, 4).0, 7);
-        assert_eq!(w.block(3, 70, 4).0, 7);
-        assert_eq!(w.block(3, 81, 4).0, 0);
-        assert_eq!(w.block(3, 0, 4).0, 1);
-        assert_eq!(w.block(-1, -64, 20).0, 9);
-        assert_eq!(w.block(-1, 319, 20).0, 9);
-        assert_eq!(w.block(0, 30, 20).0, 1);
-        // 31 dug, 3 set again, the air over them filled (28, and 17 over the stone), the whole of the other column
-        assert_eq!(out.changed, 31 + 3 + 45 + 384);
-        assert_eq!(out.chunks, 2);
-        assert!(w.bulk_log.contains(&(0, 0)) && w.bulk_log.contains(&(-1, 1)));
-        assert!(w.dirty_light.contains(&(1, 1)) && w.dirty_light.contains(&(-2, 2)));
-        assert!(w.dirty_sections.contains(&(1, 4, 1)));
-        // the per-block log is left to the blocks set one at a time
-        assert!(w.block_log.as_ref().unwrap().is_empty());
-    }
-
-    #[test]
-    fn unloaded_chunks_and_unchanged_blocks_are_left_out() {
-        let mut w = world();
-        let out = w.edit_runs(
-            &[run(100, 100, 0, 10, 0, None), run(0, 0, 0, 10, 1, None)],
-            |_, _| true,
-            |_| false,
-        );
-        assert_eq!(out.changed, 0);
-        assert_eq!(out.chunks, 0);
-        assert!(w.bulk_log.is_empty() && w.dirty_light.is_empty());
-    }
-
-    #[test]
-    fn tracked_states_are_reported() {
-        let mut w = world();
-        let out = w.edit_runs(&[run(1, 1, 60, 65, 3, None)], |_, _| true, |s| s == 3);
-        assert_eq!(out.tracked.len(), 6);
-        assert_eq!(out.tracked[0], ((1, 60, 1), 1, 3));
-        assert_eq!(out.tracked[5], ((1, 65, 1), 0, 3));
-    }
-
-    #[test]
-    fn heightmaps_follow_the_edit() {
-        let mut w = world();
-        let air = |s: u32| s == 0;
-        assert_eq!(w.world_surface(5, 5, |s| air(s.0)), 64);
-        w.edit_runs(&[run(5, 5, 20, 63, 0, None)], |_, _| true, |_| false);
-        assert_eq!(w.world_surface(5, 5, |s| air(s.0)), 20);
-        w.edit_runs(&[run(5, 5, 90, 90, 2, None)], |_, _| true, |_| false);
-        assert_eq!(w.world_surface(5, 5, |s| air(s.0)), 91);
-    }
-
-    #[test]
-    fn runs_follow_each_chunks_own_layout() {
-        use crate::chunk::ColumnLayout;
-        // a data pack's taller dimension: -128..=511
-        let tall = ColumnLayout::new(-128, 640).unwrap();
-        let mut w = World::new(BlockStateId(0), 0);
-        w.chunks
-            .insert((0, 0), Arc::new(Chunk::with_layout(0, 0, tall)));
-        let out = w.edit_runs(&[run(2, 3, -500, 900, 4, None)], |_, _| true, |_| false);
-        assert_eq!(out.changed, 640);
-        let chunk = &w.chunks[&(0, 0)];
-        assert_eq!(chunk.block(2, -128, 3).0, 4);
-        assert_eq!(chunk.block(2, -65, 3).0, 4);
-        assert_eq!(chunk.block(2, 320, 3).0, 4);
-        assert_eq!(chunk.block(2, 511, 3).0, 4);
-        assert!(w.dirty_sections.contains(&(0, 39, 0)));
-        assert!(!w.dirty_sections.contains(&(0, 40, 0)));
-    }
-}
@@ -23,7 +23,7 @@
 //! Which states tick is a table by state id, built by the game from the block
 //! registry; whether a slot is made is decided when the slot is promoted at
 //! the start of the next tick, from the block state then.
-use crate::chunk::block_entity::{BlockEntity, ModContainer, ModEnergyBuffer, ModFluidTanks};
+use crate::chunk::block_entity::{BlockEntity, ModContainer};
 use crate::fast_hash::{FxHashMap, FxHashSet};
 use std::collections::HashMap;
 use std::sync::Arc;
@@ -46,7 +46,6 @@ pub enum Ticking {
 #[derive(Default)]
 pub struct BlockEntities {
    map: HashMap<Pos, BlockEntity>,
-    attachments: HashMap<Pos, horizon_world::attachments::Attachments>,
    /// `Level.blockEntityTickers`: positions and the slot each was given.
    tickers: Arc<Vec<(Pos, u32)>>,
    /// `LevelChunk.tickersInLevel`: the live slot of each ticking position.
@@ -74,44 +73,6 @@ pub struct BlockEntities {
    /// The containers of mod blocks' block entities, by block state id;
    /// built with `states`.
    mod_containers: FxHashMap<u32, Arc<ModContainer>>,
-    /// The fluid tanks of mod blocks' block entities, by block state id;
-    /// built with `states`, like the containers.
-    mod_fluids: FxHashMap<u32, Arc<ModFluidTanks>>,
-    /// The energy buffers of mod blocks' block entities, by block state id;
-    /// built with `states`, like the containers.
-    mod_energy: FxHashMap<u32, Arc<ModEnergyBuffer>>,
-    /// The positions of the mod block entities (`BlockEntity::Mod`) by chunk,
-    /// for the renderer: the mesher lists block entities by their template,
-    /// which leaves out a mod block whose template has none. One taken out
-    /// (`take`) stays listed until `put` or `remove`.
-    mods: FxHashMap<(i32, i32), FxHashSet<Pos>>,
-    /// The positions of the block entities that draw a bounding box (structure and test
-    /// instance blocks, `shows_box`), so a frame looks at them without scanning the map.
-    /// Like `mods`, one taken out stays listed until `put` or `remove`.
-    boxes: FxHashSet<Pos>,
-}
-
-/// A structure or test instance block: the block entities whose box the frame may draw.
-fn shows_box(entity: &BlockEntity) -> bool {
-    matches!(
-        entity,
-        BlockEntity::StructureBlock(_) | BlockEntity::TestInstanceBlock(_)
-    )
-}
-
-fn chunk_of((x, _, z): Pos) -> (i32, i32) {
-    (x >> 4, z >> 4)
-}
-
-/// Takes `pos` out of its chunk's mod block entity set.
-fn forget_mod(mods: &mut FxHashMap<(i32, i32), FxHashSet<Pos>>, pos: Pos) {
-    let chunk = chunk_of(pos);
-    if let Some(set) = mods.get_mut(&chunk) {
-        set.remove(&pos);
-        if set.is_empty() {
-            mods.remove(&chunk);
-        }
-    }
 }

 impl std::ops::Deref for BlockEntities {
@@ -201,20 +162,6 @@ impl BlockEntities {
    pub fn mod_container(&self, state: u32) -> Option<&Arc<ModContainer>> {
        self.mod_containers.get(&state)
    }
-    pub fn set_mod_fluids(&mut self, fluids: FxHashMap<u32, Arc<ModFluidTanks>>) {
-        self.mod_fluids = fluids;
-    }
-    /// The fluid tanks of a mod block's block entity in block state `state`.
-    pub fn mod_fluids(&self, state: u32) -> Option<&Arc<ModFluidTanks>> {
-        self.mod_fluids.get(&state)
-    }
-    pub fn set_mod_energy(&mut self, energy: FxHashMap<u32, Arc<ModEnergyBuffer>>) {
-        self.mod_energy = energy;
-    }
-    /// The energy buffer of a mod block's block entity in block state `state`.
-    pub fn mod_energy(&self, state: u32) -> Option<&Arc<ModEnergyBuffer>> {
-        self.mod_energy.get(&state)
-    }

    fn next(&mut self) -> u32 {
        let n = self.next_slot;
@@ -233,69 +180,6 @@ impl BlockEntities {
        self.pending.remove(pos);
    }

-    /// Attachment map for a live block entity.
-    pub fn attachments_mut(
-        &mut self,
-        pos: Pos,
-    ) -> Option<&mut horizon_world::attachments::Attachments> {
-        if !self.map.contains_key(&pos) && !self.out.contains(&pos) {
-            return None;
-        }
-        Some(self.attachments.entry(pos).or_default())
-    }
-    /// Attachment maps in a loaded chunk, for a save snapshot.
-    pub fn chunk_attachments(
-        &self,
-        x: i32,
-        z: i32,
-    ) -> Vec<(Pos, horizon_world::attachments::Attachments)> {
-        self.attachments
-            .iter()
-            .filter(|(p, _)| p.0 >> 4 == x && p.2 >> 4 == z)
-            .map(|(p, data)| (*p, data.clone()))
-            .collect()
-    }
-    /// Restore a loaded block entity's attachment map.
-    pub fn restore_attachments(&mut self, pos: Pos, data: horizon_world::attachments::Attachments) {
-        if self.map.contains_key(&pos) {
-            self.attachments.insert(pos, data);
-        }
-    }
-    /// Whether any mod block entity is in the map: until one is, a block change
-    /// never looks one up (`LevelAccess::has_mod_block_entity`).
-    pub fn has_mods(&self) -> bool {
-        !self.mods.is_empty()
-    }
-    /// The structure and test instance blocks (a frame draws their boxes), in no order.
-    pub fn boxes(&self) -> impl Iterator<Item = (&Pos, &BlockEntity)> {
-        self.boxes
-            .iter()
-            .filter_map(|pos| Some((pos, self.map.get(pos)?)))
-    }
-    /// Keeps `pos` listed in `boxes` exactly while `entity` shows a box.
-    fn note_box(&mut self, pos: Pos, entity: Option<&BlockEntity>) {
-        if entity.is_some_and(shows_box) {
-            self.boxes.insert(pos);
-        } else {
-            self.boxes.remove(&pos);
-        }
-    }
-    /// The mod block entities within `radius` blocks of `x`, `z` (by chunk, so
-    /// far ones are skipped whole; the caller checks each distance).
-    pub fn mods_near(&self, x: f64, z: f64, radius: f64) -> impl Iterator<Item = &Pos> {
-        let far = move |c: i32, at: f64| {
-            let (lo, hi) = (f64::from(c * 16), f64::from(c * 16 + 16));
-            at < lo - radius || at > hi + radius
-        };
-        self.mods
-            .iter()
-            .filter(move |((cx, cz), _)| !far(*cx, x) && !far(*cz, z))
-            .flat_map(|(_, set)| set)
-    }
-    /// `LevelChunk.getBlockEntity`: the block entity at `pos`, if any.
-    pub fn get(&self, pos: &Pos) -> Option<&BlockEntity> {
-        self.map.get(pos)
-    }
    pub fn get_mut(&mut self, pos: &Pos) -> Option<&mut BlockEntity> {
        self.map.get_mut(pos)
    }
@@ -307,33 +191,11 @@ impl BlockEntities {
    }
    /// `LevelChunk.setBlockEntity` (+ `addAndRegisterBlockEntity`): a new
    /// block entity may get a slot; one replacing another keeps its slot.
-    /// One of the same type rewrites it in place (a jukebox taking a disc,
-    /// `/data merge block`), where vanilla keeps the object, so its
-    /// attachments stay; any other replacement starts them over.
    pub fn insert(&mut self, pos: Pos, entity: BlockEntity) -> Option<BlockEntity> {
-        let new_is_mod = matches!(entity, BlockEntity::Mod(_));
-        let same_type = |old: &BlockEntity| match (old, &entity) {
-            (BlockEntity::Mod(old), BlockEntity::Mod(new)) => old.id == new.id,
-            (old, new) => std::mem::discriminant(old) == std::mem::discriminant(new),
-        };
-        if !self.map.get(&pos).is_some_and(same_type) {
-            self.attachments.remove(&pos);
-        }
-        let new_box = shows_box(&entity);
        let old = self.map.insert(pos, entity);
        if old.is_none() {
            self.add(pos);
        }
-        if new_box {
-            self.boxes.insert(pos);
-        } else if old.as_ref().is_some_and(shows_box) {
-            self.boxes.remove(&pos);
-        }
-        if new_is_mod {
-            self.mods.entry(chunk_of(pos)).or_default().insert(pos);
-        } else if matches!(old, Some(BlockEntity::Mod(_))) {
-            forget_mod(&mut self.mods, pos);
-        }
        old
    }
    /// The block entity at `pos`, made by `make` when there is none.
@@ -342,29 +204,15 @@ impl BlockEntities {
        pos: Pos,
        make: impl FnOnce() -> BlockEntity,
    ) -> &mut BlockEntity {
-        let absent = !self.map.contains_key(&pos);
-        if absent {
+        if !self.map.contains_key(&pos) {
            self.add(pos);
        }
-        let entity = self.map.entry(pos).or_insert_with(make);
-        if absent && matches!(entity, BlockEntity::Mod(_)) {
-            self.mods.entry(chunk_of(pos)).or_default().insert(pos);
-        }
-        if absent && shows_box(entity) {
-            self.boxes.insert(pos);
-        }
-        entity
+        self.map.entry(pos).or_insert_with(make)
    }
    /// `LevelChunk.removeBlockEntity`: the block entity and its slot.
    pub fn remove(&mut self, pos: &Pos) -> Option<BlockEntity> {
-        self.attachments.remove(pos);
        self.cancel(pos);
-        let removed = self.map.remove(pos);
-        if matches!(removed, Some(BlockEntity::Mod(_))) {
-            forget_mod(&mut self.mods, *pos);
-        }
-        self.boxes.remove(pos);
-        removed
+        self.map.remove(pos)
    }
    /// The block entity at `pos`, out of the map for a while: its slot stays
    /// for `put` to bring it back (a tick working on it).
@@ -378,10 +226,6 @@ impl BlockEntities {
    /// Brings back what `take` took, in its slot.
    pub fn put(&mut self, pos: Pos, entity: BlockEntity) {
        self.out.remove(&pos);
-        if matches!(entity, BlockEntity::Mod(_)) {
-            self.mods.entry(chunk_of(pos)).or_default().insert(pos);
-        }
-        self.note_box(pos, Some(&entity));
        if self.map.insert(pos, entity).is_none()
            && !self.live.contains_key(&pos)
            && !self.pending.contains_key(&pos)
@@ -392,30 +236,18 @@ impl BlockEntities {
    /// Removes the block entities `keep` refuses, and their slots
    /// (`clearAllBlockEntities` of unloaded chunks).
    pub fn retain(&mut self, mut keep: impl FnMut(&Pos, &mut BlockEntity) -> bool) {
-        let (live, pending, freed, attachments) = (
-            &mut self.live,
-            &mut self.pending,
-            &mut self.freed,
-            &mut self.attachments,
-        );
-        let (mods, boxes) = (&mut self.mods, &mut self.boxes);
+        let (live, pending, freed) = (&mut self.live, &mut self.pending, &mut self.freed);
        self.map.retain(|p, e| {
            let kept = keep(p, e);
            if !kept {
-                attachments.remove(p);
                *freed |= live.remove(p).is_some();
                pending.remove(p);
-                forget_mod(mods, *p);
-                boxes.remove(p);
            }
            kept
        });
    }
    pub fn clear(&mut self) {
-        self.attachments.clear();
        self.map.clear();
-        self.mods.clear();
-        self.boxes.clear();
        self.tickers = Arc::default();
        self.live.clear();
        self.added.clear();
@@ -432,18 +264,9 @@ impl BlockEntities {
    pub fn load_chunk(&mut self, entities: Vec<(Pos, BlockEntity)>) {
        let order = chunk_map_order(entities.iter().map(|(p, _)| *p));
        for (p, e) in entities {
-            self.attachments.remove(&p);
-            let new_is_mod = matches!(e, BlockEntity::Mod(_));
-            self.note_box(p, Some(&e));
-            let old = self.map.insert(p, e);
-            if old.is_some() {
+            if self.map.insert(p, e).is_some() {
                self.replaced.insert(p);
            }
-            if new_is_mod {
-                self.mods.entry(chunk_of(p)).or_default().insert(p);
-            } else if matches!(old, Some(BlockEntity::Mod(_))) {
-                forget_mod(&mut self.mods, p);
-            }
        }
        for p in order {
            self.add(p);
@@ -536,85 +359,6 @@ mod tests {
            .collect()
    }

-    fn near(b: &BlockEntities, x: f64, z: f64, radius: f64) -> Vec<Pos> {
-        let mut found: Vec<Pos> = b.mods_near(x, z, radius).copied().collect();
-        found.sort();
-        found
-    }
-    #[test]
-    fn mod_block_entities_are_listed_by_chunk_until_they_go() {
-        let mut b = level();
-        let modded = || BlockEntity::Mod(Box::default());
-        b.insert((1, 64, 1), modded());
-        b.insert((200, 64, 1), modded());
-        b.insert((2, 64, 2), hopper());
-        b.get_or_insert_with((3, 64, 3), modded);
-        b.load_chunk(vec![((4, 64, 4), modded()), ((5, 64, 5), hopper())]);
-        // Only mods, and only chunks within reach.
-        assert_eq!(
-            near(&b, 0.0, 0.0, 64.0),
-            [(1, 64, 1), (3, 64, 3), (4, 64, 4)]
-        );
-        assert_eq!(near(&b, 200.0, 0.0, 8.0), [(200, 64, 1)]);
-        // Taken out for a tick, still listed; removed or replaced, gone.
-        let taken = b.take(&(1, 64, 1)).unwrap();
-        assert_eq!(near(&b, 0.0, 0.0, 64.0).len(), 3);
-        b.put((1, 64, 1), taken);
-        b.remove(&(3, 64, 3));
-        b.insert((4, 64, 4), hopper());
-        assert_eq!(near(&b, 0.0, 0.0, 64.0), [(1, 64, 1)]);
-        b.retain(|p, _| p.0 != 1);
-        assert!(near(&b, 0.0, 0.0, 64.0).is_empty());
-        b.clear();
-        assert!(near(&b, 200.0, 0.0, 8.0).is_empty());
-    }
-    #[test]
-    fn attachments_follow_block_entity_lifetime() {
-        use horizon_world::attachments::AttachmentType;
-        let ty = AttachmentType {
-            namespace: "test",
-            name: "value",
-            default: || 0,
-            codec: None,
-            copy_on_death: false,
-            sync: false,
-        };
-        let p = (1, 64, 2);
-        let mut entities = level();
-        assert!(entities.attachments_mut(p).is_none());
-        entities.insert(p, hopper());
-        entities.attachments_mut(p).unwrap().set(&ty, 4).unwrap();
-        let held = entities.take(&p).unwrap();
-        entities.put(p, held);
-        assert_eq!(entities.attachments_mut(p).unwrap().get(&ty), Ok(4));
-        entities.insert(p, hopper());
-        assert_eq!(entities.attachments_mut(p).unwrap().get(&ty), Ok(4));
-        let machine = |id: &str| {
-            BlockEntity::Mod(Box::new(
-                crate::chunk::block_entity::ModBlockEntityFields {
-                    id: id.into(),
-                    ..Default::default()
-                }
-                .into(),
-            ))
-        };
-        entities.insert(p, machine("test:a"));
-        assert_eq!(entities.attachments_mut(p).unwrap().get(&ty), Ok(0));
-        entities.attachments_mut(p).unwrap().set(&ty, 4).unwrap();
-        entities.insert(p, machine("test:a"));
-        assert_eq!(entities.attachments_mut(p).unwrap().get(&ty), Ok(4));
-        entities.insert(p, machine("test:b"));
-        assert_eq!(entities.attachments_mut(p).unwrap().get(&ty), Ok(0));
-        entities.attachments_mut(p).unwrap().set(&ty, 4).unwrap();
-        entities.remove(&p);
-        entities.insert(p, hopper());
-        assert_eq!(entities.attachments_mut(p).unwrap().get(&ty), Ok(0));
-        entities.attachments_mut(p).unwrap().set(&ty, 5).unwrap();
-        entities.retain(|_, _| false);
-        entities.insert(p, hopper());
-        assert_eq!(entities.attachments_mut(p).unwrap().get(&ty), Ok(0));
-    }
-
    #[test]
    fn slots_follow_vanilla_lifecycle() {
        let mut b = level();
@@ -699,43 +443,4 @@ mod tests {
        b.state_changed(p, 2, 1);
        assert_eq!(order(&mut b, &s), [q, p]);
    }
-
-    #[test]
-    fn boxes_list_exactly_the_structure_and_test_blocks() {
-        let test_block = || BlockEntity::TestInstanceBlock(Box::default());
-        let listed = |b: &BlockEntities| {
-            let mut v: Vec<Pos> = b.boxes().map(|(p, _)| *p).collect();
-            v.sort();
-            v
-        };
-        let mut b = level();
-        let (p, q, r) = ((0, 0, 0), (1, 0, 0), (2, 0, 0));
-        b.insert(p, test_block());
-        b.insert(q, hopper());
-        assert_eq!(listed(&b), [p]);
-        // Replaced by another kind, and back.
-        b.insert(p, hopper());
-        assert_eq!(listed(&b), []);
-        b.insert(q, test_block());
-        b.get_or_insert_with(r, test_block);
-        assert_eq!(listed(&b), [q, r]);
-        // Taken out: not shown until put back; put back as another kind: gone.
-        let taken = b.take(&q).unwrap();
-        assert_eq!(listed(&b), [r]);
-        b.put(q, taken);
-        assert_eq!(listed(&b), [q, r]);
-        let taken = b.take(&r).unwrap();
-        drop(taken);
-        b.put(r, hopper());
-        assert_eq!(listed(&b), [q]);
-        b.remove(&q);
-        assert_eq!(listed(&b), []);
-        b.load_chunk(vec![(p, test_block()), (q, hopper())]);
-        assert_eq!(listed(&b), [p]);
-        b.retain(|pos, _| *pos != p);
-        assert_eq!(listed(&b), []);
-        b.insert(r, test_block());
-        b.clear();
-        assert!(b.boxes.is_empty());
-    }
 }
@@ -383,7 +383,7 @@ impl Shulker {
        out
    }
    /// `ShulkerBoxBlock.canOpen`: a closed box only opens when its lid has room
-    /// (`level.noCollision` of the lid box at half progress, deflated by 1e-6).
+    /// (`level.noCollision` of the half-block lid box, deflated by 1e-6).
    pub fn lid_box(pos: [i32; 3], facing: u8) -> [f64; 6] {
        let bottom = [
            f64::from(pos[0]) + 0.5,
@@ -1,630 +0,0 @@
-//! OptiFine custom entity models over the block entities' models (`block_entity_render`'s
-//! `MODELS`): `chest.jem`, `shulker_box.jem`, `banner.jem`, `bell.jem`, `head_zombie.jem`... (the
-//! "Block entity name" table of OptiFine's `cem_model.txt`, and Entity Model Features' one-file
-//! `banner`), found and read as the mobs' are ([`horizon_optifine::cem::files`]). Each entry
-//! replaces or joins the boxes of the vanilla part it names and takes its `scale`; animations
-//! don't run yet. A `.jem`'s texture paints the models it reshapes instead of vanilla's when the
-//! atlas has it.
-//!
-//! An entry's part is OptiFine's name for it, else the vanilla part's own name. Trapped and
-//! ender chests take only their own file, and copper chests (no CEM name) keep vanilla's chest.
-//! Lectern and enchanting-table books take theirs, else `book`. Signs, hanging signs and beds are
-//! block models here, so their files are not read; copper golem statues have no CEM name.
-
-use crate::block_entity_render::ModelPart;
-use horizon_optifine::cem::{
-    files::{atlas_name, jem_files, load_jem},
-    model::{Bone, EntityModel},
-};
-use std::{
-    collections::{BTreeMap, HashMap, HashSet},
-    path::Path,
-};
-
-/// One model the renderer draws, the CEM names that reshape it, best first, and OptiFine's
-/// names for its vanilla parts.
-struct Target {
-    key: &'static str,
-    /// The vanilla model it starts from: `key` itself, or the one a block the renderer tells
-    /// apart shares (a trapped chest's is the chest's).
-    base: &'static str,
-    names: &'static [&'static str],
-    parts: &'static [(&'static str, &'static str)],
-}
-
-const CHEST: &[(&str, &str)] = &[
-    ("root", "root"),
-    ("base", "bottom"),
-    ("lid", "lid"),
-    ("knob", "lock"),
-];
-const SHULKER: &[(&str, &str)] = &[("root", "root"), ("base", "base"), ("lid", "lid")];
-const BANNER: &[(&str, &str)] = &[("stand", "pole"), ("top", "bar")];
-const FLAG: &[(&str, &str)] = &[("slate", "flag")];
-const HEAD: &[(&str, &str)] = &[("root", "root"), ("head", "head")];
-const DRAGON: &[(&str, &str)] = &[("root", "root"), ("head", "head"), ("jaw", "jaw")];
-const PIGLIN: &[(&str, &str)] = &[
-    ("root", "root"),
-    ("head", "head"),
-    ("left_ear", "left_ear"),
-    ("right_ear", "right_ear"),
-];
-const BELL: &[(&str, &str)] = &[
-    ("root", "root"),
-    ("body", "bell_body"),
-    ("base", "bell_base"),
-];
-const BOOK: &[(&str, &str)] = &[
-    ("root", "root"),
-    ("cover_right", "right_lid"),
-    ("cover_left", "left_lid"),
-    ("pages_right", "right_pages"),
-    ("pages_left", "left_pages"),
-    ("flipping_page_right", "flip_page1"),
-    ("flipping_page_left", "flip_page2"),
-    ("book_spine", "seam"),
-];
-const POT_BASE: &[(&str, &str)] = &[("neck", "neck"), ("top", "top"), ("bottom", "bottom")];
-const POT_SIDES: &[(&str, &str)] = &[
-    ("front", "front"),
-    ("back", "back"),
-    ("left", "left"),
-    ("right", "right"),
-];
-
-const fn model(
-    key: &'static str,
-    names: &'static [&'static str],
-    parts: &'static [(&'static str, &'static str)],
-) -> Target {
-    Target {
-        key,
-        base: key,
-        names,
-        parts,
-    }
-}
-const fn copy(
-    key: &'static str,
-    base: &'static str,
-    names: &'static [&'static str],
-    parts: &'static [(&'static str, &'static str)],
-) -> Target {
-    Target {
-        key,
-        base,
-        names,
-        parts,
-    }
-}
-
-/// In order: a copy comes after its base.
-const TARGETS: &[Target] = &[
-    model("chest", &["chest"], CHEST),
-    model("double_chest_left", &["chest_left"], CHEST),
-    model("double_chest_right", &["chest_right"], CHEST),
-    copy("trapped_chest", "chest", &["trapped_chest"], CHEST),
-    copy(
-        "trapped_chest_left",
-        "double_chest_left",
-        &["trapped_chest_left"],
-        CHEST,
-    ),
-    copy(
-        "trapped_chest_right",
-        "double_chest_right",
-        &["trapped_chest_right"],
-        CHEST,
-    ),
-    copy("ender_chest", "chest", &["ender_chest"], CHEST),
-    model("shulker_box", &["shulker_box"], SHULKER),
-    model("standing_banner", &["banner_base", "banner"], BANNER),
-    model("wall_banner", &["banner_base", "banner"], BANNER),
-    model("standing_banner_flag", &["banner_flag", "banner"], FLAG),
-    model("wall_banner_flag", &["banner_flag", "banner"], FLAG),
-    model("skeleton_skull", &["head_skeleton"], HEAD),
-    model("wither_skeleton_skull", &["head_wither_skeleton"], HEAD),
-    model("zombie_head", &["head_zombie"], HEAD),
-    model("creeper_head", &["head_creeper"], HEAD),
-    model("dragon_skull", &["head_dragon"], DRAGON),
-    model("piglin_head", &["head_piglin"], PIGLIN),
-    model("player_head", &["head_player"], HEAD),
-    model("bell", &["bell"], BELL),
-    model("book", &["enchanting_book", "book"], BOOK),
-    copy("lectern_book", "book", &["lectern_book", "book"], BOOK),
-    model("conduit_shell", &["conduit"], &[("base", "shell")]),
-    model("conduit_cage", &["conduit"], &[("cage", "shell")]),
-    model("conduit_wind", &["conduit"], &[("wind", "wind")]),
-    model("conduit_eye", &["conduit"], &[("eye", "eye")]),
-    model("decorated_pot_base", &["decorated_pot"], POT_BASE),
-    model("decorated_pot_sides", &["decorated_pot"], POT_SIDES),
-];
-
-/// Every model, reshaped or vanilla's, and the atlas names of the `.jem` textures by model.
-pub type Reshaped = (
-    HashMap<&'static str, ModelPart>,
-    HashMap<&'static str, String>,
-);
-
-/// The models the packs under `root` reshape, over `vanilla`'s; None when no block entity has
-/// a `.jem` there.
-pub fn reshape(root: &Path, vanilla: &HashMap<&'static str, ModelPart>) -> Option<Reshaped> {
-    let (reshaped, unused) = reshape_all(root, vanilla)?;
-    for (path, part) in unused {
-        log::warn!("Horizon: custom entity model {path}: no part {part}");
-    }
-    Some(reshaped)
-}
-
-/// [`reshape`]'s models, and each file's entries whose part none of the models it reshapes has.
-fn reshape_all(
-    root: &Path,
-    vanilla: &HashMap<&'static str, ModelPart>,
-) -> Option<(Reshaped, Vec<(String, String)>)> {
-    let files = jem_files(root);
-    let named = |t: &Target| t.names.iter().any(|n| files.contains_key(*n));
-    if !TARGETS.iter().any(named) {
-        return None;
-    }
-    let mut models = vanilla.clone();
-    let mut textures = HashMap::new();
-    let mut reshaped = HashSet::new();
-    // Each file parsed once; which of its entries found a part in some model.
-    let mut parsed: HashMap<&str, Option<EntityModel>> = HashMap::new();
-    let mut used: BTreeMap<&str, Vec<bool>> = BTreeMap::new();
-    for t in TARGETS {
-        let Some(model) = vanilla.get(t.base) else {
-            continue;
-        };
-        let found = t
-            .names
-            .iter()
-            .flat_map(|name| files.get(*name).into_iter().flatten())
-            .map(String::as_str)
-            .find(|&path| {
-                parsed
-                    .entry(path)
-                    .or_insert_with(|| load_jem(root, path))
-                    .is_some()
-            });
-        let Some(path) = found else {
-            // A copy of a reshaped base that has no file of its own stays vanilla.
-            if t.key != t.base && reshaped.contains(t.base) {
-                models.insert(t.key, model.clone());
-            }
-            continue;
-        };
-        let Some(Some(jem)) = parsed.get(path) else {
-            continue;
-        };
-        let mut out = model.clone();
-        let hits = apply(&mut out, jem, t.parts);
-        // A file shared by several models (the conduit's, the pot's) paints only the models
-        // it reshapes: vanilla geometry keeps its own texture's layout.
-        let reshapes = hits.iter().any(|hit| *hit);
-        let marks = used
-            .entry(path)
-            .or_insert_with(|| vec![false; jem.parts.len()]);
-        for (mark, hit) in marks.iter_mut().zip(hits) {
-            *mark |= hit;
-        }
-        models.insert(t.key, out);
-        reshaped.insert(t.key);
-        if reshapes && let Some(texture) = jem.texture.as_deref().and_then(atlas_name) {
-            textures.insert(t.key, texture);
-        }
-    }
-    let mut unused = Vec::new();
-    for (path, marks) in &used {
-        let Some(Some(jem)) = parsed.get(path) else {
-            continue;
-        };
-        for (p, _) in jem.parts.iter().zip(marks).filter(|(_, hit)| !**hit) {
-            unused.push(((*path).to_owned(), p.part.clone()));
-        }
-    }
-    Some(((models, textures), unused))
-}
-
-/// `jem`'s entries on `model`, OptiFine's part names read through `parts`, else as the vanilla
-/// part's own name: a replacing entry clears its part's boxes, and each joins the part as a child
-/// `cem#<n>`. Which entries found their part.
-fn apply(model: &mut ModelPart, jem: &EntityModel, parts: &[(&str, &str)]) -> Vec<bool> {
-    let mut count = 0;
-    let mut hits = Vec::with_capacity(jem.parts.len());
-    for p in &jem.parts {
-        let mapped = parts.iter().find(|(of, _)| *of == p.part).map(|&(_, v)| v);
-        let target = match mapped {
-            Some(vanilla) if find_mut(model, vanilla).is_some() => vanilla,
-            _ => p.part.as_str(),
-        };
-        let Some(node) = find_mut(model, target) else {
-            hits.push(false);
-            continue;
-        };
-        if !p.attach {
-            node.polygons.clear();
-        }
-        let (name, mut bone) = part(&p.bone, &mut count);
-        bone.pose[6..9].fill(p.scale);
-        node.children.push((name, bone));
-        hits.push(true);
-    }
-    hits
-}
-
-/// The model itself for `root`, else its first part named `name`, depth first.
-fn find_mut<'a>(model: &'a mut ModelPart, name: &str) -> Option<&'a mut ModelPart> {
-    fn child<'a>(part: &'a mut ModelPart, name: &str) -> Option<&'a mut ModelPart> {
-        part.children.iter_mut().find_map(|(n, c)| {
-            if n.as_str() == name {
-                Some(c)
-            } else {
-                child(c, name)
-            }
-        })
-    }
-    if name == "root" {
-        return Some(model);
-    }
-    child(model, name)
-}
-
-/// A baked bone as a model part, named `cem#<n>`: unique in the model, so no vanilla pose
-/// change by name reaches it.
-fn part(bone: &Bone, count: &mut usize) -> (String, ModelPart) {
-    let name = format!("cem#{count}");
-    *count += 1;
-    let [x, y, z] = bone.pivot;
-    let [rx, ry, rz] = bone.rotation;
-    let out = ModelPart {
-        pose: [x, y, z, rx, ry, rz, 1.0, 1.0, 1.0],
-        polygons: bone.quads.iter().map(|q| q.vertices).collect(),
-        children: bone.children.iter().map(|c| part(c, count)).collect(),
-    };
-    (name, out)
-}
-
-#[cfg(test)]
-pub(crate) mod tests {
-    use super::*;
-    use std::{collections::BTreeSet, fs};
-
-    /// A part with one face and `children`.
-    pub(crate) fn plane(children: Vec<(&str, ModelPart)>) -> ModelPart {
-        ModelPart {
-            pose: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0],
-            polygons: vec![[[0.0; 5]; 4]],
-            children: children
-                .into_iter()
-                .map(|(n, c)| (n.to_owned(), c))
-                .collect(),
-        }
-    }
-    pub(crate) fn chest() -> ModelPart {
-        let mut root = plane(vec![
-            ("bottom", plane(vec![])),
-            ("lid", plane(vec![])),
-            ("lock", plane(vec![])),
-        ]);
-        root.polygons.clear();
-        root
-    }
-    pub(crate) const BOX: &str =
-        r#""boxes": [{"coordinates": [0, 0, 0, 1, 1, 1], "textureOffset": [0, 0]}]"#;
-    /// A fresh pack folder named for `test`, holding `files` under `assets/minecraft/`.
-    pub(crate) fn pack(test: &str, files: &[(&str, String)]) -> std::path::PathBuf {
-        let root =
-            std::env::temp_dir().join(format!("horizon-be-cem-{test}-{}", std::process::id()));
-        let _ = fs::remove_dir_all(&root);
-        for (path, text) in files {
-            let path = root.join("assets/minecraft").join(path);
-            fs::create_dir_all(path.parent().unwrap()).unwrap();
-            fs::write(path, text).unwrap();
-        }
-        root
-    }
-    /// A `.jem` replacing each of `parts` with one box.
-    fn jem(parts: &[&str]) -> String {
-        let entries: Vec<_> = parts
-            .iter()
-            .map(|p| format!(r#"{{"part": "{p}", {BOX}}}"#))
-            .collect();
-        format!(r#"{{"models": [{}]}}"#, entries.join(", "))
-    }
-    /// A `.jem` replacing each of `parts` with a box of its own: the `i`th is `i + 1` pixels
-    /// deep, so a part that took another entry's box shows.
-    fn jem_sized(parts: &[&str]) -> String {
-        let entries: Vec<_> = parts
-            .iter()
-            .enumerate()
-            .map(|(i, p)| {
-                let depth = i + 1;
-                format!(
-                    r#"{{"part": "{p}", "boxes": [{{"coordinates": [0, 0, 0, 1, 1, {depth}], "textureOffset": [0, 0]}}]}}"#
-                )
-            })
-            .collect();
-        format!(r#"{{"models": [{}]}}"#, entries.join(", "))
-    }
-    /// How deep (z) the custom box under `model`'s part `name` is.
-    fn depth(model: &ModelPart, name: &str) -> f32 {
-        let part = model.child(name).unwrap();
-        let zs = part
-            .children
-            .iter()
-            .flat_map(|(_, c)| c.polygons.iter().flatten().map(|v| v[2]));
-        let (lo, hi) = zs.fold((f32::MAX, f32::MIN), |(lo, hi), z| (lo.min(z), hi.max(z)));
-        hi - lo
-    }
-    /// Whether `model`'s part `name` was replaced by one custom box: its own face gone, and one
-    /// child of a box's six faces.
-    fn replaced(model: &ModelPart, name: &str) -> bool {
-        let part = model.child(name).unwrap();
-        match part.children.as_slice() {
-            [(_, only)] => part.polygons.is_empty() && only.polygons.len() == 6,
-            _ => false,
-        }
-    }
-
-    #[test]
-    fn every_optifine_part_name_lands_on_its_vanilla_part() {
-        // File, OptiFine's part, the model it reshapes, vanilla's part there.
-        let cases = [
-            ("chest", "base", "chest", "bottom"),
-            ("chest", "lid", "chest", "lid"),
-            ("chest", "knob", "chest", "lock"),
-            ("chest_left", "base", "double_chest_left", "bottom"),
-            ("chest_left", "lid", "double_chest_left", "lid"),
-            ("chest_left", "knob", "double_chest_left", "lock"),
-            ("chest_right", "base", "double_chest_right", "bottom"),
-            ("chest_right", "lid", "double_chest_right", "lid"),
-            ("chest_right", "knob", "double_chest_right", "lock"),
-            ("trapped_chest", "base", "trapped_chest", "bottom"),
-            ("trapped_chest", "knob", "trapped_chest", "lock"),
-            ("trapped_chest_left", "base", "trapped_chest_left", "bottom"),
-            ("trapped_chest_left", "knob", "trapped_chest_left", "lock"),
-            (
-                "trapped_chest_right",
-                "base",
-                "trapped_chest_right",
-                "bottom",
-            ),
-            ("trapped_chest_right", "knob", "trapped_chest_right", "lock"),
-            ("ender_chest", "base", "ender_chest", "bottom"),
-            ("ender_chest", "knob", "ender_chest", "lock"),
-            ("shulker_box", "base", "shulker_box", "base"),
-            ("shulker_box", "lid", "shulker_box", "lid"),
-            ("banner", "stand", "standing_banner", "pole"),
-            ("banner", "top", "standing_banner", "bar"),
-            ("banner", "top", "wall_banner", "bar"),
-            ("banner", "slate", "standing_banner_flag", "flag"),
-            ("banner", "slate", "wall_banner_flag", "flag"),
-            ("head_skeleton", "head", "skeleton_skull", "head"),
-            (
-                "head_wither_skeleton",
-                "head",
-                "wither_skeleton_skull",
-                "head",
-            ),
-            ("head_zombie", "head", "zombie_head", "head"),
-            ("head_creeper", "head", "creeper_head", "head"),
-            ("head_dragon", "head", "dragon_skull", "head"),
-            ("head_dragon", "jaw", "dragon_skull", "jaw"),
-            ("head_piglin", "head", "piglin_head", "head"),
-            ("head_piglin", "left_ear", "piglin_head", "left_ear"),
-            ("head_piglin", "right_ear", "piglin_head", "right_ear"),
-            ("head_player", "head", "player_head", "head"),
-            ("bell", "body", "bell", "bell_body"),
-            ("bell", "base", "bell", "bell_base"),
-            ("enchanting_book", "cover_right", "book", "right_lid"),
-            ("enchanting_book", "cover_left", "book", "left_lid"),
-            ("enchanting_book", "pages_right", "book", "right_pages"),
-            ("enchanting_book", "pages_left", "book", "left_pages"),
-            (
-                "enchanting_book",
-                "flipping_page_right",
-                "book",
-                "flip_page1",
-            ),
-            (
-                "enchanting_book",
-                "flipping_page_left",
-                "book",
-                "flip_page2",
-            ),
-            ("enchanting_book", "book_spine", "book", "seam"),
-            ("lectern_book", "cover_right", "lectern_book", "right_lid"),
-            ("lectern_book", "pages_left", "lectern_book", "left_pages"),
-            (
-                "lectern_book",
-                "flipping_page_right",
-                "lectern_book",
-                "flip_page1",
-            ),
-            ("lectern_book", "book_spine", "lectern_book", "seam"),
-            ("conduit", "base", "conduit_shell", "shell"),
-            ("conduit", "cage", "conduit_cage", "shell"),
-            ("conduit", "wind", "conduit_wind", "wind"),
-            ("conduit", "eye", "conduit_eye", "eye"),
-            ("decorated_pot", "neck", "decorated_pot_base", "neck"),
-            ("decorated_pot", "top", "decorated_pot_base", "top"),
-            ("decorated_pot", "bottom", "decorated_pot_base", "bottom"),
-            ("decorated_pot", "front", "decorated_pot_sides", "front"),
-            ("decorated_pot", "back", "decorated_pot_sides", "back"),
-            ("decorated_pot", "left", "decorated_pot_sides", "left"),
-            ("decorated_pot", "right", "decorated_pot_sides", "right"),
-        ];
-        // One file per name with each of its parts, and a stub of each model holding its parts
-        // (chest models all of theirs, so a misplaced entry shows).
-        let mut files: BTreeMap<&str, BTreeSet<&str>> = BTreeMap::new();
-        let mut trees: BTreeMap<&str, BTreeSet<&str>> = BTreeMap::new();
-        for (file, part, key, vanilla) in cases {
-            files.entry(file).or_default().insert(part);
-            trees.entry(key).or_default().insert(vanilla);
-        }
-        for key in ["chest", "double_chest_left", "double_chest_right"] {
-            trees
-                .entry(key)
-                .or_default()
-                .extend(["bottom", "lid", "lock"]);
-        }
-        let files_by_name = files.clone();
-        let files: Vec<_> = files
-            .iter()
-            .map(|(file, parts)| {
-                let parts: Vec<_> = parts.iter().copied().collect();
-                (format!("optifine/cem/{file}.jem"), jem_sized(&parts))
-            })
-            .collect();
-        let files: Vec<_> = files.iter().map(|(p, t)| (p.as_str(), t.clone())).collect();
-        let root = pack("parts", &files);
-        let vanilla: HashMap<&'static str, ModelPart> = trees
-            .iter()
-            .map(|(key, parts)| {
-                let parts = parts.iter().map(|p| (*p, plane(vec![]))).collect();
-                (*key, plane(parts))
-            })
-            .collect();
-        let result = reshape_all(&root, &vanilla);
-        fs::remove_dir_all(&root).unwrap();
-        let ((models, _), unused) = result.unwrap();
-        for (file, part, key, vanilla) in cases {
-            assert!(
-                replaced(&models[key], vanilla),
-                "{file}.jem {part}: {key} {vanilla}"
-            );
-            // The box is this entry's own: swapped names (left and right, body and base) show.
-            let own = files_by_name[file].iter().position(|p| *p == part).unwrap() + 1;
-            assert_eq!(
-                depth(&models[key], vanilla),
-                own as f32,
-                "{file}.jem {part}: {key} {vanilla}"
-            );
-        }
-        assert_eq!(unused, Vec::new());
-    }
-
-    #[test]
-    fn a_chest_jem_reshapes_the_chest_alone_and_warns_of_entries_without_a_part() {
-        let root = pack(
-            "chest",
-            &[(
-                "optifine/cem/chest.jem",
-                format!(
-                    r#"{{"texture": "textures/entity/chest/fancy.png", "models": [
-                        {{"part": "lid", {BOX}}},
-                        {{"part": "knob", "attach": true, "scale": 2, {BOX}}},
-                        {{"part": "bottom", {BOX}}},
-                        {{"part": "tail", {BOX}}}]}}"#
-                ),
-            )],
-        );
-        let vanilla: HashMap<_, _> = [("chest", chest()), ("double_chest_left", chest())].into();
-        let result = reshape_all(&root, &vanilla);
-        fs::remove_dir_all(&root).unwrap();
-        let ((models, textures), unused) = result.unwrap();
-        let chest = &models["chest"];
-        // Replaced: the lid's own face goes and the custom box (6 faces) joins it.
-        assert!(replaced(chest, "lid"));
-        // `bottom` is no OptiFine name but vanilla's own: it reaches the part as well.
-        assert!(replaced(chest, "bottom"));
-        // Attached: the lock keeps its face beside the scaled box.
-        let lock = chest.child("lock").unwrap();
-        assert_eq!((lock.polygons.len(), lock.children.len()), (1, 1));
-        assert_eq!(lock.children[0].1.pose[6..], [2.0, 2.0, 2.0]);
-        // `tail` names no chest part: the one warning.
-        assert_eq!(
-            unused,
-            [(
-                "assets/minecraft/optifine/cem/chest.jem".to_owned(),
-                "tail".to_owned()
-            )]
-        );
-        // The double chest has no file, nor do trapped and ender chests: vanilla's own, and
-        // only the chest takes the texture.
-        for key in ["double_chest_left", "trapped_chest", "ender_chest"] {
-            let lid = models[key].child("lid").unwrap();
-            assert_eq!((lid.polygons.len(), lid.children.len()), (1, 0), "{key}");
-        }
-        assert_eq!(
-            textures,
-            HashMap::from([("chest", "entity/chest/fancy".to_owned())])
-        );
-    }
-
-    #[test]
-    fn banners_split_one_file_and_books_fall_back() {
-        let root = pack(
-            "banner",
-            &[
-                ("optifine/cem/banner.jem", jem(&["stand", "top", "slate"])),
-                ("emf/cem/enchanting_book.jem", jem(&["cover_left"])),
-            ],
-        );
-        let banner = plane(vec![("pole", plane(vec![])), ("bar", plane(vec![]))]);
-        let wall = plane(vec![("bar", plane(vec![]))]);
-        let flag = plane(vec![("flag", plane(vec![]))]);
-        let book = plane(vec![("left_lid", plane(vec![]))]);
-        let vanilla: HashMap<_, _> = [
-            ("standing_banner", banner),
-            ("wall_banner", wall),
-            ("wall_banner_flag", flag),
-            ("book", book),
-        ]
-        .into();
-        let result = reshape_all(&root, &vanilla);
-        fs::remove_dir_all(&root).unwrap();
-        let ((models, textures), unused) = result.unwrap();
-        assert!(replaced(&models["standing_banner"], "pole"));
-        assert!(replaced(&models["standing_banner"], "bar"));
-        assert!(replaced(&models["wall_banner"], "bar"));
-        assert!(replaced(&models["wall_banner_flag"], "flag"));
-        assert!(replaced(&models["book"], "left_lid"));
-        // The lectern's book has no file of its own nor `book.jem`: vanilla's.
-        let lectern = models["lectern_book"].child("left_lid").unwrap();
-        assert_eq!((lectern.polygons.len(), lectern.children.len()), (1, 0));
-        assert!(textures.is_empty());
-        // Each entry found its part in one of the models: no warning.
-        assert_eq!(unused, Vec::new());
-    }
-
-    #[test]
-    fn book_jem_reshapes_the_lectern_book_without_its_own_file() {
-        let root = pack("book", &[("optifine/cem/book.jem", jem(&["cover_left"]))]);
-        let vanilla: HashMap<_, _> = [("book", plane(vec![("left_lid", plane(vec![]))]))].into();
-        let result = reshape(&root, &vanilla);
-        fs::remove_dir_all(&root).unwrap();
-        let (models, _) = result.unwrap();
-        assert!(replaced(&models["book"], "left_lid"));
-        assert!(replaced(&models["lectern_book"], "left_lid"));
-    }
-
-    #[test]
-    fn a_shared_file_paints_only_the_models_it_reshapes() {
-        // The conduit's file reshapes its eye alone: the shell, cage and wind keep their
-        // vanilla geometry and so their own textures.
-        let file = format!(
-            r#"{{"texture": "textures/entity/conduit/custom.png", "models": [{{"part": "eye", {BOX}}}]}}"#
-        );
-        let root = pack("conduit", &[("optifine/cem/conduit.jem", file)]);
-        let vanilla: HashMap<_, _> = [
-            "conduit_shell",
-            "conduit_cage",
-            "conduit_wind",
-            "conduit_eye",
-        ]
-        .map(|key| {
-            let part = if key == "conduit_eye" { "eye" } else { "shell" };
-            (key, plane(vec![(part, plane(vec![]))]))
-        })
-        .into();
-        let result = reshape(&root, &vanilla);
-        fs::remove_dir_all(&root).unwrap();
-        let (models, textures) = result.unwrap();
-        assert!(replaced(&models["conduit_eye"], "eye"));
-        let painted: BTreeSet<_> = textures.keys().copied().collect();
-        assert_eq!(painted, BTreeSet::from(["conduit_eye"]));
-        assert_eq!(textures["conduit_eye"], "entity/conduit/custom");
-    }
-}