Vulkan, DX12: phase 1's solid draws made and counted on the GPU

Where multi-draws take their count from a buffer (MULTI_DRAW_INDIRECT_COUNT:
Vulkan 1.2+, DX12), the render thread no longer finds each phase 1 section's
facing runs nor uploads a draw per run: it lists one record per section, and
gpu_lists.wgsl's sides_draws writes one indirect draw per run the CPU would have
pushed (same count, base vertex and instance) into a call per pass and arena
page, drawn with multi_draw_indexed_indirect_count. Each call has room for
the most runs its sections' parts can have (Sides::part_runs). Same exclusions
as the flat path; HORIZON_GPU_LISTS=0 turns it off.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

.claude/skills/vanilla-parity/SKILL.md

@@ -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.
 

.gitattributes

@@ -4,3 +4,8 @@ docs/launcher-commands.md text eol=lf
 docs/horizon-ctl-commands.md text eol=lf
 crates/horizon-theme/tokens.css text eol=lf
 docs/api/*-reference.md text eol=lf
+# Generated by `cargo run -p xtask -- mod-api`; `--check` compares them byte for byte.
+crates/horizon-client/src/mod_api/generated.rs linguist-generated=true text eol=lf
+crates/horizon-client/src/mod_api/generated_host.rs linguist-generated=true text eol=lf
+crates/horizon-client/src/game/mod_api_host_generated.rs linguist-generated=true text eol=lf
+crates/horizon-client-render/src/gfx/native_render/generated.rs linguist-generated=true text eol=lf

.github/actionlint.yaml

@@ -1,4 +1,3 @@
 self-hosted-runner:
   # The Mac mini's runner (ludovics-mac-mini), which holds the maintainer's own Minecraft files.
-  # windows-11-vs2026-arm is GitHub's Windows ARM64 image (2026-08), newer than actionlint's label list.
-  labels: [horizon-game, ludovics-mac-mini, windows-11-vs2026-arm]
+  labels: [horizon-game, ludovics-mac-mini]

.github/trusted-reviewers.txt

@@ -1,16 +1,10 @@
-# Trusted reviewers: one list for three things (docs/release-flow.md "Trusted reviewers").
+# Trusted reviewers: one list for two things (docs/release-flow.md "Trusted reviewers").
 # - `/nightly 2640 2642` picks the pull requests the Nightly holds (tools/ci/nightly_set.py);
-# - `/close`, `/reopen`, `/label`, `/unlabel` triage issues and pull requests (tools/ci/triage_command.py);
-# - `/unclaim @login` releases someone else's claim, and listed reviewers have no claim limit (tools/ci/claim_command.py).
-# One reviewer per line: `<numeric GitHub ID> <login>`, with who added it and when. The ID decides; the login is only
-# for people reading this file and for messages. A login is a name anyone can claim once its owner renames or deletes
-# the account; an ID is never reused. Get it with `gh api users/<login> --jq .id`, or run
-# `python3 tools/ci/resolve_reviewer_ids.py` to fill in the IDs and `--check` to catch renames.
-# A line in any other form (a bare login included) grants nothing. Ludovic is always allowed (OWNER_ID in
-# tools/ci/nightly_set.py) and isn't listed. Removing a line revokes that account at once. A line with only `paused`
-# stops all three for every reviewer (Ludovic's still work).
-54669067 kacpherek       # added by Ludovic, 2026-10-27
-87152661 rdbtCVS         # added by Ludovic, 2026-10-27
-84875247 Online5277      # added by Ludovic, 2026-10-27 (his top three by merged pull requests)
-86072227 levzzz5154      # added by Ludovic, 2026-10-28 (Horizon Team; author of horizon-mixins)
-87478350 Qwerner88880    # added by Ludovic, 2026-10-31 (Discord vladislav_hagen; native-mod hooks)
+# - `/close`, `/reopen`, `/label`, `/unlabel` triage issues and pull requests (tools/ci/triage_command.py).
+# Ludovic is always allowed and isn't listed. One GitHub login per line, with who added it and when. Removing a
+# line revokes that login at once. A line with only `paused` stops both for every reviewer (Ludovic's still work).
+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)

.github/workflows/cancel-on-close.yml

@@ -9,9 +9,9 @@ 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
+    # One of playhorizon's small runners, out of GitHub's shared 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: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "playhorizon-light"]') || 'ubuntu-latest' }}
     steps:
       - name: Cancel the pull request's unfinished runs
         env:

.github/workflows/cargo-horizon-mod.yml

@@ -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: ${{ steps.platforms.outputs.platforms }}
-    steps:
-      - uses: actions/checkout@v7
-      - id: platforms
-        run: echo "platforms=$(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@v7
-      - 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@v7
-        with:
-          name: cargo-horizon-mod-${{ matrix.target }}
-          path: dist/*.tar.gz
-          if-no-files-found: error
-          retention-days: 3
-  publish:
-    needs: build
-    if: startsWith(github.ref, 'refs/tags/')
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    permissions:
-      contents: write
-    steps:
-      - uses: actions/checkout@v7
-      - uses: actions/download-artifact@v8
-        with:
-          pattern: cargo-horizon-mod-*
-          path: dist
-          merge-multiple: true
-      - name: The tag and the manifest name the same release and archives
-        run: python3 tools/horizon_mod_binstall.py dist "$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

.github/workflows/ci.yml

@@ -27,24 +27,19 @@ 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.
+  # Where: GitHub's runners. With the repository variable SELF_HOSTED_CI=all (for when that pool is full: their 4 CPUs
+  # are about one GitHub runner, docs/ci-runners.md), main's pushes and this repository's own pull requests run on
+  # playhorizon's checks runners (label playhorizon-ci); a fork's pull request never does (and the runners refuse it
+  # themselves). There 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' }}
+    runs-on: ${{ vars.SELF_HOSTED_CI == 'all' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) && fromJSON('["self-hosted", "linux", "playhorizon-ci"]') || 'ubuntu-latest' }}
     timeout-minutes: 45
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: actions/setup-python@v7
+      - uses: actions/setup-python@v5
         if: runner.environment == 'github-hosted'
         with:
           python-version: '3.12'
@@ -68,16 +63,6 @@ jobs:
           else
             python tools/check_public_tree.py --history
           fi
-      # Our runners as GitHub's: some Python tests compile Rust with a bare `rustc` (GitHub's image has a default
-      # toolchain, our runners' own rustup homes may not), and the GPU tests find no adapter there, so they return
-      # early. Ours have Mesa's software Vulkan for parity; a backend Linux lacks keeps the tests from it, so a pull
-      # request's verify doesn't depend on which pool took it (#8627: a GPU test that flakes on lavapipe).
-      - name: Our runners as GitHub's (a default Rust toolchain, no GPU)
-        if: runner.environment != 'github-hosted'
-        run: |
-          rustup toolchain install stable --profile minimal --component rustfmt --component clippy
-          rustup default stable
-          echo "WGPU_BACKEND=dx12" >> "$GITHUB_ENV"
       - name: Test offline research tooling
         run: python -m unittest discover -s tests -v
       - name: Install Rust toolchain and the ALSA and udev headers the client links against
@@ -111,22 +96,17 @@ 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
   # 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' }}
+    runs-on: ${{ vars.SELF_HOSTED_CI == 'all' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) && fromJSON('["self-hosted", "linux", "playhorizon-ci"]') || 'ubuntu-latest' }}
     timeout-minutes: 45
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Does this pull request change the launcher or a crate it builds?
@@ -158,113 +138,18 @@ jobs:
         run: |
           cargo +stable fmt --check
           cargo +stable clippy --all-targets --locked -- -D warnings
-          cargo +stable test --locked --lib --bins
-  # Compile and test Windows ARM64 on an actual ARM64 host, and inspect the resulting PE headers. By hand only
-  # (`gh workflow run checks --ref <branch>`): GitHub's runner queue is the bottleneck, and main's runs gate the
-  # releases (tools/release_train.py waits for them), so neither pull requests nor main's pushes start this
-  # 90-minute job. The Nightly and launcher releases build and check these binaries on every run.
-  windows-arm64:
-    name: Windows ARM64 game and launcher
-    if: github.event_name == 'workflow_dispatch'
-    runs-on: windows-11-vs2026-arm
-    timeout-minutes: 90
-    env:
-      RUSTFLAGS: -C target-feature=+crt-static
-    steps:
-      - uses: actions/checkout@v7
-        with:
-          fetch-depth: 0
-      - name: Use every runner core for Cargo
-        shell: pwsh
-        run: |
-          $cores = (Get-CimInstance Win32_Processor | Measure-Object -Property NumberOfLogicalProcessors -Sum).Sum
-          "CARGO_BUILD_JOBS=$cores" >> $env:GITHUB_ENV
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: aarch64-pc-windows-msvc
-      - uses: Swatinem/rust-cache@v2
-        with:
-          shared-key: windows-arm64-game
-      - uses: Swatinem/rust-cache@v2
-        with:
-          workspaces: launcher
-          shared-key: windows-arm64-launcher
-      - name: Check LLVM assembler used by ring
-        shell: pwsh
-        run: |
-          $llvmBin = Join-Path $env:ProgramFiles 'LLVM\bin'
-          if (-not (Get-Command clang -ErrorAction SilentlyContinue) -and (Test-Path (Join-Path $llvmBin 'clang.exe'))) {
-            $env:PATH = "$llvmBin;$env:PATH"
-            "PATH=$env:PATH" >> $env:GITHUB_ENV
-          }
-          $clang = Get-Command clang -ErrorAction Stop
-          Write-Output "Using $($clang.Source)"
-          & $clang.Source --version
-      - name: Build the game for native Windows ARM64
-        run: cargo build --release --locked --target aarch64-pc-windows-msvc -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
-      - name: Check the game's PE machine
-        run: python tools/check_pe_arch.py arm64 target/aarch64-pc-windows-msvc/release/horizon-client.exe target/aarch64-pc-windows-msvc/release/horizon-ctl.exe target/aarch64-pc-windows-msvc/release/horizon-prepare.exe target/aarch64-pc-windows-msvc/release/horizon-server.exe
-      - name: Check game DLL imports
-        run: python tools/check_imports.py target/aarch64-pc-windows-msvc/release/horizon-client.exe target/aarch64-pc-windows-msvc/release/horizon-ctl.exe target/aarch64-pc-windows-msvc/release/horizon-prepare.exe target/aarch64-pc-windows-msvc/release/horizon-server.exe
-      - name: Start every game executable
-        shell: pwsh
-        run: |
-          $ErrorActionPreference = 'Stop'
-          $client = 'target/aarch64-pc-windows-msvc/release/horizon-client.exe'
-          $output = & $client --help 2>&1
-          if ($LASTEXITCODE -ne 0 -or ($output -join "`n") -notmatch '--resources') { throw 'horizon-client --help failed' }
-          foreach ($binary in @('horizon-ctl.exe', 'horizon-prepare.exe', 'horizon-server.exe')) {
-            $path = "target/aarch64-pc-windows-msvc/release/$binary"
-            $output = & $path --help 2>&1
-            if ($LASTEXITCODE -ne 0 -or -not $output) { throw "$binary --help failed" }
-          }
-          foreach ($binary in @('horizon-prepare.exe', 'horizon-server.exe')) {
-            $path = "target/aarch64-pc-windows-msvc/release/$binary"
-            $output = & $path --version 2>&1
-            if ($LASTEXITCODE -ne 0 -or -not $output) { throw "$binary --version failed" }
-            Write-Output ($output -join "`n")
-          }
-      - name: Test and build the native Windows ARM64 launcher
-        working-directory: launcher
-        run: |
-          cargo test --release --locked --target aarch64-pc-windows-msvc --lib
-          cargo build --release --locked --target aarch64-pc-windows-msvc
-      - name: Check the launcher's PE machine
-        working-directory: launcher
-        run: python ../tools/check_pe_arch.py arm64 target/aarch64-pc-windows-msvc/release/horizon-launcher.exe
-      - name: Check launcher DLL imports and command-line startup
-        working-directory: launcher
-        shell: pwsh
-        run: |
-          $ErrorActionPreference = 'Stop'
-          $launcher = 'target/aarch64-pc-windows-msvc/release/horizon-launcher.exe'
-          python ../tools/check_imports.py $launcher
-          $output = & $launcher --version 2>&1
-          if ($LASTEXITCODE -ne 0 -or -not $output) { throw 'horizon-launcher --version failed' }
-          Write-Output ($output -join "`n")
-      - name: Build a native-mod game with the launcher's managed toolchain
-        working-directory: launcher
-        shell: pwsh
-        env:
-          HORIZON_LAUNCHER_HOME: ${{ runner.temp }}\horizon-native-arm64-toolchain
-          HORIZON_NATIVE_TARGET_DIR: ${{ runner.temp }}\horizon-native-arm64-toolchain\target
-        run: |
-          $ErrorActionPreference = 'Stop'
-          cargo test --release --locked --target aarch64-pc-windows-msvc --lib rust_toolchain::tests::managed_arm64_toolchain_builds_the_game -- --ignored --exact --nocapture
-          $client = Join-Path $env:HORIZON_NATIVE_TARGET_DIR 'fast/horizon-client.exe'
-          python ../tools/check_pe_arch.py arm64 $client
-          python ../tools/check_imports.py $client
+          cargo +stable test --locked --lib
   # Most pull requests leave the harnesses to parity-main, which runs them on main a batch of merges at a time
   # (.github/workflows/parity-main.yml; releases wait for it). A pull request still runs them itself when it changes
   # 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' }}
+    # A git diff of this repository's own branch: one of playhorizon's small runners (docs/ci-runners.md).
+    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "playhorizon-light"]') || 'ubuntu-latest' }}
     outputs:
       run: ${{ steps.scope.outputs.run }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
@@ -276,7 +161,7 @@ jobs:
         run: |
           changed=$(git diff --name-only "$(git merge-base "$BASE_SHA" HEAD)" HEAD)
           harness=$(grep -E '^(tools/test_[a-z0-9_]+_parity\.py|tools/(parity[a-z_]*|lab)\.py|tools/parity_hosts\.json|mods/horizon/src/test/|crates/[^/]+/examples/|crates/horizon-client/src/game/[a-z_]*(fixture|harness)\.rs|\.github/workflows/parity[a-z-]*\.yml)' <<< "$changed" || true)
-          if [ -n "$harness" ] || [[ " $LABELS " == *" run-parity "* ]] || [[ " $LABELS " == *" frame-identity "* ]]; then
+          if [ -n "$harness" ] || [[ " $LABELS " == *" run-parity "* ]]; then
             echo "run=true" >> "$GITHUB_OUTPUT"
             echo "The pull request runs its harnesses: ${harness:-label run-parity}"
           else
@@ -291,7 +176,6 @@ jobs:
       base: ${{ github.event.pull_request.base.sha }}
       head: ${{ github.event.pull_request.head.sha }}
       full: ${{ contains(github.event.pull_request.labels.*.name, 'full-parity') }}
-      frame_identity: ${{ contains(github.event.pull_request.labels.*.name, 'frame-identity') }}
   # Horizon never downloads the game. These jobs need a self-hosted Linux runner
   # (label horizon-game) holding the maintainer's own copy: the official launcher's
   # game directory in HORIZON_MINECRAFT_DIR and the pinned server jar in
@@ -300,13 +184,13 @@ jobs:
     if: github.event_name == 'workflow_dispatch'
     runs-on: [self-hosted, linux, horizon-game]
     steps:
-      - uses: actions/checkout@v7
-      - uses: actions/setup-python@v7
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.12'
       - name: Install Rust toolchain
         run: rustup toolchain install stable --profile minimal
-      - uses: actions/setup-java@v6
+      - uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: '25'
@@ -648,11 +532,11 @@ jobs:
     if: github.event_name == 'workflow_dispatch'
     runs-on: [self-hosted, linux, horizon-game]
     steps:
-      - uses: actions/checkout@v7
-      - uses: actions/setup-python@v7
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.12'
-      - uses: actions/setup-java@v6
+      - uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: '25'

.github/workflows/claim-command.yml

@@ -29,14 +29,14 @@ 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' }}
+    # One of playhorizon's small runners, out of GitHub's shared pool: main's script only (docs/ci-runners.md).
+    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "playhorizon-light"]') || 'ubuntu-latest' }}
     timeout-minutes: 5
     permissions:
       contents: read
       issues: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: main
           persist-credentials: false
@@ -50,22 +50,20 @@ jobs:
           GH_TOKEN: ${{ github.token }}
           BODY: ${{ github.event.comment.body }}
           AUTHOR: ${{ github.event.comment.user.login }}
-          # Who may act is decided by this numeric ID: a login can be claimed by someone else after a rename.
-          AUTHOR_ID: ${{ github.event.comment.user.id }}
           ISSUE: ${{ github.event.issue.number }}
           COMMENT_ID: ${{ github.event.comment.id }}
           REPO: ${{ github.repository }}
         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' }}
+    # One of playhorizon's small runners, out of GitHub's shared pool: main's script only (docs/ci-runners.md).
+    runs-on: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "playhorizon-light"]') || 'ubuntu-latest' }}
     timeout-minutes: 10
     permissions:
       contents: read
       issues: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: main
           persist-credentials: false

.github/workflows/game-build.yml

@@ -1,6 +1,6 @@
 name: game build
-# Builds the game for every platform from `ref`: the Java exporters, then Linux and the Linux server, Windows x64
-# and ARM64 on GitHub, and macOS on the Mac mini's runner with a 1500-frame offscreen run of a new world (smoke-test.json): Apple
+# Builds the game for every platform from `ref`: the Java exporters, then Linux and the Linux server and Windows on
+# GitHub, macOS on the Mac mini's runner with a 1500-frame offscreen run of a new world (smoke-test.json): Apple
 # Silicon, and Intel cross-built there for x86_64-apple-darwin and checked under Rosetta 2 (#1161). Called by
 # release.yml (the releases) and nightly-build.yml (the opt-in Nightly), always from main's copy of this file: the
 # caller's commit, never the one being built. It holds no secrets: signing the checksums is the callers' own job,
@@ -45,7 +45,7 @@ jobs:
     # Three full preparations (two isolated, one batched) besides the compile.
     timeout-minutes: 60
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.ref }}
           persist-credentials: false
@@ -73,7 +73,7 @@ jobs:
             ! \( -name '*.class' \( -path 'exporters/server/dev/horizonlab/parity/*' -o -path 'exporters/client/dev/horizonlab/parity/*' \) \))
           [ -z "$stray" ] || { echo "::error::not one of our classes: $stray"; exit 1; }
           python3 tools/check_prepare_exporters.py --binary target/release/horizon-prepare
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         with:
           name: original-exporters
           path: exporters/
@@ -83,10 +83,6 @@ jobs:
   build:
     needs: exporters
     name: build ${{ matrix.name }}
-    # Windows ARM64 and musl are new: a failure never holds the other platforms' release (the signing job
-    # needs this job, and a failed entry of it would fail it). The release steps leave the missing
-    # optional archives out with a warning.
-    continue-on-error: ${{ matrix.name == 'windows-arm64' || matrix.name == 'linux-musl' }}
     strategy:
       fail-fast: false
       matrix:
@@ -98,28 +94,13 @@ jobs:
             # The server build too: packaging/server/install.sh installs it on Linux.
             server_dir: horizon-server-linux-x86_64
             server_asset: horizon-server-linux-x86_64.tar.gz
-          - name: linux-musl
-            os: ubuntu-22.04
-            musl: true
-            dir: horizon-linux-musl-x86_64
-            asset: horizon-linux-musl-x86_64.tar.gz
           - name: windows
             os: windows-latest
             dir: horizon-windows-x64
             asset: horizon-windows-x64.zip
             exe: .exe
-            pe_arch: x64
             # The C runtime linked in, so the game runs without the Visual C++ redistributable.
             rustflags: -C target-feature=+crt-static
-          - name: windows-arm64
-            os: windows-11-vs2026-arm
-            target: aarch64-pc-windows-msvc
-            dir: horizon-windows-arm64
-            asset: horizon-windows-arm64.zip
-            exe: .exe
-            pe_arch: arm64
-            # The ARM64 runner builds and runs native ARM64 executables; keep the C runtime in the archive.
-            rustflags: -C target-feature=+crt-static
           - name: macos
             mac: true
             dir: horizon-macos-arm64
@@ -147,7 +128,7 @@ jobs:
       run:
         shell: bash
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.ref }}
           persist-credentials: false
@@ -160,29 +141,21 @@ jobs:
         with:
           targets: ${{ matrix.target }}
       - uses: Swatinem/rust-cache@v2
-        if: runner.environment == 'github-hosted' && !matrix.musl
+        if: runner.environment == 'github-hosted'
         with:
           # A release restores only what a release saved: an untrusted build has its own key and saves nothing.
           shared-key: ${{ inputs.trusted && 'release' || 'nightly' }}-${{ matrix.name }}
           save-if: ${{ inputs.trusted }}
       - name: ALSA and udev headers
-        if: runner.os == 'Linux' && !matrix.musl
+        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
-        if: ${{ !matrix.musl }}
         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
       - name: Every program the release folder takes was built
-        if: ${{ !matrix.musl }}
         run: |
           for binary in horizon-client horizon-ctl horizon-prepare horizon-server; do
             test -f "$BIN/$binary${{ matrix.exe }}" || { echo "::error::$BIN/$binary${{ matrix.exe }} is missing"; exit 1; }
           done
-      - name: Verify Windows executable architecture
-        if: runner.os == 'Windows'
-        run: |
-          python tools/check_pe_arch.py "${{ matrix.pe_arch }}" \
-            "$BIN/horizon-client${{ matrix.exe }}" "$BIN/horizon-ctl${{ matrix.exe }}" \
-            "$BIN/horizon-prepare${{ matrix.exe }}" "$BIN/horizon-server${{ matrix.exe }}"
       - name: The signing keychain, unlocked
         if: runner.os == 'macOS' && vars.MACOS_SIGN_IDENTITY != '' && inputs.developer_id
         env:
@@ -200,7 +173,6 @@ jobs:
             codesign --verify --strict --verbose=2 "$BIN/$binary"
           done
       - name: Only system libraries
-        if: ${{ !matrix.musl }}
         # Windows: no non-system DLL (a "DLL not found" dialog on some players' machines). Linux: the standard
         # loader and libraries every desktop distribution has. macOS: only the system's own libraries.
         run: |
@@ -213,17 +185,7 @@ 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' && matrix.pe_arch != 'arm64' && !matrix.musl
-        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
-        if: ${{ !matrix.musl }}
         run: |
           set -euo pipefail
           bin=$BIN
@@ -268,26 +230,18 @@ jobs:
           # Published with the release; the publish job checks it again before it publishes anything.
           cp "$home/smoke.json" "$RUNNER_TEMP/smoke-test.json"
       # One smoke-test.json per build, the Apple Silicon one's; the Intel build must pass its own run too.
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         if: runner.environment == 'self-hosted' && !matrix.target
         with:
           name: smoke-test.json
           path: ${{ runner.temp }}/smoke-test.json
           if-no-files-found: error
           retention-days: 3
-      - uses: actions/download-artifact@v8
+      - uses: actions/download-artifact@v4
         with:
           name: original-exporters
           path: exporters
-      - name: Build, check and package for musl in Alpine
-        if: matrix.musl
-        # Run Docker on the Ubuntu host: JavaScript actions themselves require glibc.
-        run: |
-          docker run --rm -v "$PWD:/work" -w /work \
-            -e HORIZON_VERSION -e HORIZON_NIGHTLY \
-            rust:alpine3.22 sh tools/ci/build-musl.sh
       - name: Package
-        if: ${{ !matrix.musl }}
         run: |
           set -euo pipefail
           cargo run --locked -p xtask -- package "$BIN/horizon-client${{ matrix.exe }}" "dist/${{ matrix.dir }}"
@@ -314,7 +268,7 @@ jobs:
             codesign --verify --strict "dist/${{ matrix.dir }}/$binary"
           done
           packaging/macos/notarize.sh "dist/${{ matrix.asset }}"
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.asset }}
           path: dist/${{ matrix.asset }}
@@ -336,7 +290,7 @@ jobs:
           rm -f "${{ matrix.server_asset }}"
           tar czf "${{ matrix.server_asset }}" "${{ matrix.server_dir }}"
           ls -l "${{ matrix.server_asset }}"
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         if: matrix.server_asset
         with:
           name: ${{ matrix.server_asset }}

.github/workflows/launcher.yml

@@ -1,5 +1,5 @@
 name: launcher
-# Builds the launcher on Linux, macOS, Windows x64 and ARM64, and releases it by itself (docs/release-flow.md): after a
+# Builds the launcher on Linux, macOS and Windows, and releases it by itself (docs/release-flow.md): after a
 # push to main that changes the launcher or a crate it builds in (the paths below),
 # every 10 minutes (a release waiting for merges to settle goes out) and by hand, tools/release_train.py decides as
 # for the game.
@@ -15,9 +15,6 @@ name: launcher
 # 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 each architecture's launcher in its ZIP (what a launcher updates itself from) and as
-# horizon-launcher-setup.exe or horizon-launcher-setup-arm64.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
 
@@ -29,7 +26,6 @@ on:
       - 'launcher/**'
       - 'crates/horizon-bench/**'
       - 'crates/horizon-friends/**'
-      - 'crates/horizon-mcp/**'
       - 'crates/horizon-mods/**'
       - 'crates/horizon-port-pack/**'
       - 'crates/horizon-prepare/**'
@@ -74,7 +70,7 @@ jobs:
       version: ${{ steps.decide.outputs.version }}
       dry_run: ${{ steps.mode.outputs.dry_run }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - id: mode
@@ -103,10 +99,6 @@ jobs:
     needs: decide
     if: needs.decide.outputs.release == 'true'
     name: build ${{ matrix.name }}
-    # Windows ARM64 is new: its failure never holds the other platforms' release (the signing job
-    # needs this job, and a failed entry of it would fail it). The release steps leave the missing
-    # ARM64 files out with a warning.
-    continue-on-error: ${{ matrix.name == 'windows-arm64' }}
     strategy:
       fail-fast: false
       matrix:
@@ -130,20 +122,9 @@ jobs:
             os: windows-latest
             asset: horizon-launcher-windows-x64.zip
             binary: horizon-launcher.exe
-            pe_arch: x64
-            setup_asset: horizon-launcher-setup.exe
             # The C runtime linked in: without it the launcher asks for VCRUNTIME140.dll,
             # which only the Visual C++ redistributable installs.
             rustflags: -C target-feature=+crt-static
-          - name: windows-arm64
-            os: windows-11-vs2026-arm
-            target: aarch64-pc-windows-msvc
-            asset: horizon-launcher-windows-arm64.zip
-            binary: horizon-launcher.exe
-            pe_arch: arm64
-            setup_asset: horizon-launcher-setup-arm64.exe
-            # The C runtime linked in, so the standalone ARM64 launcher needs no redistributable.
-            rustflags: -C target-feature=+crt-static
     runs-on: ${{ matrix.mac && (vars.MAC_RUNNER || 'ludovics-mac-mini') || matrix.os }}
     # Notarizing the app and then the .dmg can take a few minutes each.
     timeout-minutes: ${{ matrix.mac && 60 || 40 }}
@@ -166,7 +147,7 @@ jobs:
         working-directory: launcher
         shell: bash
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: ${{ needs.decide.outputs.head }}
           persist-credentials: false
@@ -193,14 +174,11 @@ jobs:
         run: |
           if ! xcrun metal --version > /dev/null 2>&1; then
             echo "::notice::No Metal toolchain on this runner: GPUI compiles its shaders at run time"
-            echo "LAUNCHER_FEATURES=gpui_platform/runtime_shaders" >> "$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"}
       - run: cargo build --release --locked ${{ matrix.target && format('--target {0}', matrix.target) || '' }} ${LAUNCHER_FEATURES:+--features "$LAUNCHER_FEATURES"}
-      - name: Verify Windows executable architecture
-        if: runner.os == 'Windows'
-        run: python ../tools/check_pe_arch.py "${{ matrix.pe_arch }}" "$BIN/${{ matrix.binary }}"
       - name: The version is the release's
         run: |
           out=$("$BIN/${{ matrix.binary }}" --version)
@@ -231,8 +209,7 @@ jobs:
           "$launcher" links --json
           # The Intel Mac launcher can come out before any game build has its asset (#1161): then there is nothing
           # to install yet. Only that entry skips, and only on a version list that parsed and had no build here
-          # (exit 3); a launcher or a script that fails still fails the step. The Windows ARM64 launcher always has
-          # one: it installs the x64 build where a release has no ARM64 one (backend.rs, GAME_FALLBACK).
+          # (exit 3); a launcher or a script that fails still fails the step.
           if [[ "${{ matrix.name }}" == macos-x64 ]]; then
             versions=$(retry "$launcher" --json versions)
             no_build='import json, sys; sys.exit(3 if not any(r["available_here"] for r in json.load(sys.stdin)) else 0)'
@@ -256,11 +233,6 @@ jobs:
           # release linked to a Nix store is a warning here, not a broken launcher.
           soft() { if [[ "$RUNNER_OS" == "Linux" ]]; then "$@" || echo "::warning::$* failed"; else "$@"; fi; }
           if [[ "$RUNNER_OS" == "Windows" ]]; then
-            if ! python ../tools/check_pe_arch.py "${{ matrix.pe_arch }}" "$client"; then
-              # A Nightly without an ARM64 build: the ARM64 launcher installs the x64 one (backend.rs, GAME_FALLBACK).
-              [[ "${{ matrix.pe_arch }}" == arm64 ]] && python ../tools/check_pe_arch.py x64 "$client" || exit 1
-              echo "::warning::the latest game has no ARM64 build: the launcher installed the x64 one"
-            fi
             python ../tools/check_imports.py "$client"
           elif [[ "$RUNNER_OS" == "Linux" ]]; then
             soft python3 ../tools/check_imports.py "$client"
@@ -268,18 +240,6 @@ 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 != ''
@@ -315,13 +275,7 @@ 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/${{ matrix.setup_asset }}"
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.asset }}
           path: launcher/out/*
@@ -339,12 +293,12 @@ jobs:
     # tools/ci/sign_release.sh, which calls only the runner's sha256sum and OpenSSL (docs/release-flow.md).
     environment: ${{ needs.decide.outputs.dry_run != 'true' && 'release' || '' }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           sparse-checkout: tools/ci/sign_release.sh
           sparse-checkout-cone-mode: false
           persist-credentials: false
-      - uses: actions/download-artifact@v8
+      - uses: actions/download-artifact@v4
         with:
           path: dist
           pattern: horizon-launcher-*
@@ -356,13 +310,13 @@ jobs:
           EPHEMERAL: ${{ needs.decide.outputs.dry_run == 'true' && 'yes' || '' }}
           TAG: ${{ needs.decide.outputs.tag }}
         run: bash tools/ci/sign_release.sh "$TAG" dist/horizon-launcher-*
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         with:
           name: signature
           path: dist/SHA256SUMS*
           if-no-files-found: error
           retention-days: 3
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         if: needs.decide.outputs.dry_run == 'true'
         with:
           name: ephemeral.pub
@@ -376,7 +330,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Notes
@@ -386,7 +340,7 @@ jobs:
           python3 tools/release_train.py notes --kind launcher --tag "${{ needs.decide.outputs.tag }}" \
             --head "${{ needs.decide.outputs.head }}" --out notes > /dev/null
           { echo "## $(cat notes/title.txt)"; echo; cat notes/body.md; } >> "$GITHUB_STEP_SUMMARY"
-      - uses: actions/download-artifact@v8
+      - uses: actions/download-artifact@v4
         with:
           path: dist
           merge-multiple: true
@@ -398,13 +352,6 @@ jobs:
           key=(); [[ -n "$EPHEMERAL" ]] && key=(--key "$(cat dist/ephemeral.pub)")
           cargo run --locked --quiet -p horizon-release-sign -- verify --tag "$TAG" --publishing "${key[@]}" dist
       # Never marked latest: Horizon's own releases stay the repository's latest.
-      - name: The Windows ARM64 launcher, if it built
-        # Its build may fail without holding the release (continue-on-error): the release then has no ARM64
-        # files, and ARM64 launchers stay on their version until one has (backend::launcher_update_from).
-        run: |
-          for file in horizon-launcher-windows-arm64.zip horizon-launcher-setup-arm64.exe; do
-            [[ -f "dist/$file" ]] || echo "::warning::$file is missing: this release goes out without it"
-          done
       - name: Publish ${{ needs.decide.outputs.tag }}
         if: needs.decide.outputs.dry_run != 'true'
         env:
@@ -419,7 +366,7 @@ jobs:
         run: |
           echo "Would publish ${{ needs.decide.outputs.tag }} at ${{ needs.decide.outputs.head }}: $(cat notes/title.txt)"
           ls -l dist
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         with:
           name: launcher-release-notes
           path: notes/

.github/workflows/mod-registry.yml

@@ -15,23 +15,17 @@ 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:
         working-directory: crates/horizon-mod-registry
     steps:
-      - uses: actions/checkout@v7
+      - 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' }}

.github/workflows/mojang-republish.yml

@@ -21,11 +21,10 @@ concurrency:
 
 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' }}
+    runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
       - name: Check the manifest
         env:
           GH_TOKEN: ${{ github.token }}

.github/workflows/native-hook-stamp.yml

@@ -24,7 +24,7 @@ jobs:
       pull-requests: write
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: main
           fetch-depth: 0
@@ -52,8 +52,4 @@ jobs:
             git fetch origin "+refs/heads/$branch:refs/remotes/origin/$branch"
           fi
           git push --force-with-lease origin "$branch"
-          # The repo doesn't let GitHub Actions open pull requests (that setting would also let it approve them):
-          # the branch is pushed, and a maintainer opens the PR from it.
-          if ! gh pr create --base main --head "$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.'; then
-            echo "::warning::Stamped fragments are on $branch; open a pull request from it (GitHub Actions may not open one here)."
-          fi
+          gh pr create --base main --head "$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.'

.github/workflows/nightly-build.yml

@@ -92,7 +92,7 @@ jobs:
       source_tag: ${{ steps.pick.outputs.source_tag }}
       dry_run: ${{ steps.mode.outputs.dry_run }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
           persist-credentials: false
@@ -124,14 +124,14 @@ jobs:
         env:
           SHA: ${{ steps.pick.outputs.sha }}
         run: git archive --format=tar.gz --prefix="horizon-${SHA:0:7}/" -o horizon-source.tar.gz "$SHA"
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         if: steps.pick.outputs.build == 'true'
         with:
           name: horizon-source
           path: horizon-source.tar.gz
           if-no-files-found: error
           retention-days: 3
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         with:
           name: nightly-notes
           path: nightly-notes.md
@@ -155,42 +155,32 @@ jobs:
     # The key's only job: main's sign_release.sh hashes the archives and signs with the runner's OpenSSL.
     environment: ${{ needs.pick.outputs.dry_run != 'true' && 'release' || '' }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           sparse-checkout: tools/ci/sign_release.sh
           sparse-checkout-cone-mode: false
           persist-credentials: false
-      - uses: actions/download-artifact@v8
+      - uses: actions/download-artifact@v4
         with:
           path: dist
           pattern: horizon-*
           merge-multiple: true
-      - name: Sign the checksums for the nightly channel (SHA256SUMS.sig) and for this build (SHA256SUMS.v2.sig)
-        # SHA256SUMS.sig is for launchers from before v2 (signed for "nightly"); SHA256SUMS.v2.sig is signed for
-        # nightly-<date>-<commit>, the version the release title names, which current launchers and servers
-        # require (docs/security.md, "Nightly signatures"). The publish step titles the release from the same values.
+      - name: Sign the checksums (SHA256SUMS, SHA256SUMS.sig) for the nightly channel
         env:
           RELEASE_SIGNING_KEY: ${{ secrets.RELEASE_SIGNING_KEY }}
           RELEASE_SIGNING_KEY_NEXT: ${{ secrets.RELEASE_SIGNING_KEY_NEXT }}
           EPHEMERAL: ${{ needs.pick.outputs.dry_run == 'true' && 'yes' || '' }}
-          ALSO_FOR: nightly-${{ needs.pick.outputs.date }}-${{ needs.pick.outputs.short }}
         run: |
-          # Windows ARM64's build may fail without holding the Nightly (game-build.yml): then it is left out.
-          arm64=(); if [[ -f dist/horizon-windows-arm64.zip ]]; then arm64=(dist/horizon-windows-arm64.zip)
-          else echo "::warning::horizon-windows-arm64.zip is missing: SHA256SUMS goes out without it"; fi
-          musl=(); if [[ -f dist/horizon-linux-musl-x86_64.tar.gz ]]; then musl=(dist/horizon-linux-musl-x86_64.tar.gz)
-          else echo "::warning::horizon-linux-musl-x86_64.tar.gz is missing: SHA256SUMS goes out without it"; fi
           bash tools/ci/sign_release.sh nightly dist/horizon-linux-x86_64.tar.gz dist/horizon-windows-x64.zip \
-            "${arm64[@]}" "${musl[@]}" \
             dist/horizon-macos-arm64.zip dist/horizon-macos-x64.zip dist/horizon-server-linux-x86_64.tar.gz \
             dist/horizon-source.tar.gz
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         with:
           name: signature
           path: dist/SHA256SUMS*
           if-no-files-found: error
           retention-days: 3
-      - uses: actions/upload-artifact@v7
+      - uses: actions/upload-artifact@v4
         if: needs.pick.outputs.dry_run == 'true'
         with:
           name: ephemeral.pub
@@ -205,24 +195,19 @@ jobs:
       contents: write
       issues: read          # the open release-blocker issues (gate)
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           persist-credentials: false
-      - uses: actions/download-artifact@v8
+      - uses: actions/download-artifact@v4
         with:
           path: dist
           merge-multiple: true
-      - name: The signatures, checked as launchers check them
+      - name: The signature, checked as launchers check it
         env:
           EPHEMERAL: ${{ needs.pick.outputs.dry_run == 'true' && 'yes' || '' }}
-          DATE: ${{ needs.pick.outputs.date }}
-          SHORT: ${{ needs.pick.outputs.short }}
         run: |
           key=(); [[ -n "$EPHEMERAL" ]] && key=(--key "$(cat dist/ephemeral.pub)")
           cargo run --locked --quiet -p horizon-release-sign -- verify --tag nightly --publishing "${key[@]}" dist
-          # The version's own signature, which current launchers require: the title below names the same version.
-          cargo run --locked --quiet -p horizon-release-sign -- verify --tag "nightly-${DATE}-${SHORT}" \
-            --signature SHA256SUMS.v2.sig --publishing "${key[@]}" dist
       - name: Ready to publish (the smoke test drew a world, no release-blocker is open)
         # Right before publishing, as for a release: an issue labelled while the builds ran still holds it. A dry run
         # only reports what a real run would do (that is how a blocker's fix is tried).
@@ -239,37 +224,18 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
           SHA: ${{ needs.pick.outputs.sha }}
-          SHORT: ${{ needs.pick.outputs.short }}
           DATE: ${{ needs.pick.outputs.date }}
           SOURCE_TAG: ${{ needs.pick.outputs.source_tag }}
         run: |
           set -euo pipefail
           python3 tools/ci/nightly.py rotate
           signature=(); [[ -f dist/SHA256SUMS.sig ]] && signature=(dist/SHA256SUMS.sig)
-          [[ -f dist/SHA256SUMS.v2.sig ]] && signature+=(dist/SHA256SUMS.v2.sig)
-          # The title is what launchers parse (strictly) into the version SHA256SUMS.v2.sig is signed for.
-          [[ "${SHA:0:7}" == "$SHORT" ]] || { echo "::error::the build's commit isn't the one signed"; exit 1; }
-          # The ARM64 archive only when its build succeeded (the sign job left it out of SHA256SUMS otherwise).
-          arm64=()
-          if [[ -f dist/horizon-windows-arm64.zip ]]; then
-            arm64=("dist/horizon-windows-arm64.zip#Game files the launcher installs (Nightly): Windows ARM64 (horizon-windows-arm64.zip)")
-          else
-            echo "::warning::horizon-windows-arm64.zip is missing: the Nightly goes out without it (ARM64 launchers install the x64 build)"
-          fi
-          musl=()
-          if [[ -f dist/horizon-linux-musl-x86_64.tar.gz ]]; then
-            musl=("dist/horizon-linux-musl-x86_64.tar.gz#Game files for musl Linux (horizon-linux-musl-x86_64.tar.gz)")
-          else
-            echo "::warning::horizon-linux-musl-x86_64.tar.gz is missing: the Nightly goes out without it"
-          fi
           # A pre-release, never GitHub's latest: the latest stays the last vX.Y.Z, which launchers and servers from
           # before the Nightly-only switch keep (they don't read Nightlies).
           gh release create nightly --prerelease --latest=false --target "$SHA" \
             --title "Nightly $DATE · ${SHA:0:7}" --notes-file dist/nightly-notes.md \
             "dist/horizon-linux-x86_64.tar.gz#Game files the launcher installs (Nightly): Linux (horizon-linux-x86_64.tar.gz)" \
-            "${musl[@]}" \
             "dist/horizon-windows-x64.zip#Game files the launcher installs (Nightly): Windows (horizon-windows-x64.zip)" \
-            "${arm64[@]}" \
             "dist/horizon-macos-arm64.zip#Game files the launcher installs (Nightly): macOS on Apple Silicon (horizon-macos-arm64.zip)" \
             "dist/horizon-macos-x64.zip#Game files the launcher installs (Nightly): macOS on Intel (horizon-macos-x64.zip)" \
             "dist/horizon-server-linux-x86_64.tar.gz#Nightly dedicated server for Linux (horizon-server-linux-x86_64.tar.gz)" \
@@ -287,8 +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

.github/workflows/nightly-command.yml

@@ -27,7 +27,7 @@ jobs:
       issues: write         # answers in the thread
       pull-requests: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: main
           persist-credentials: false
@@ -41,8 +41,6 @@ jobs:
           GH_TOKEN: ${{ github.token }}
           BODY: ${{ github.event.comment.body }}
           AUTHOR: ${{ github.event.comment.user.login }}
-          # Who may act is decided by this numeric ID: a login can be claimed by someone else after a rename.
-          AUTHOR_ID: ${{ github.event.comment.user.id }}
           ISSUE: ${{ github.event.issue.number }}
           COMMENT_URL: ${{ github.event.comment.html_url }}
         run: python3 tools/ci/nightly_set.py command

.github/workflows/nightly.yml

@@ -48,7 +48,7 @@ jobs:
           else
             echo "run=true" >> "$GITHUB_OUTPUT"
           fi
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         if: steps.when.outputs.run == 'true'
         with:
           fetch-depth: 0
@@ -82,7 +82,7 @@ jobs:
         run: python3 tools/ci/parity_issues.py --since "${{ steps.audit.outputs.since }}" ${{ inputs.dry_run && '--dry-run' || '' }} | tee -a "$GITHUB_STEP_SUMMARY"
       - name: Logs of the failed harnesses
         if: steps.when.outputs.run == 'true' && steps.audit.outputs.exit != '0'
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v4
         with:
           name: nightly-parity-logs
           path: .local/parity-runner/logs/

.github/workflows/overlap-note.yml

@@ -19,15 +19,15 @@ 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
+    # One of playhorizon's small runners, out of GitHub's shared 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: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "playhorizon-light"]') || 'ubuntu-latest' }}
     timeout-minutes: 10
     permissions:
       contents: read
       pull-requests: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: main
           fetch-depth: 0

.github/workflows/pack-bench.yml

@@ -22,24 +22,17 @@ env:
 
 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' }}
+    runs-on: ubuntu-latest
     timeout-minutes: 90
     steps:
-      - uses: actions/checkout@v7
+      - 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
+          sudo apt-get update && sudo apt-get install -y --no-install-recommends libasound2-dev libudev-dev
           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
@@ -53,15 +46,11 @@ jobs:
           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="$target" cargo run --profile fast -p horizon-client-render \
+          (cd ../base && CARGO_TARGET_DIR="$GITHUB_WORKSPACE/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

.github/workflows/parity-main.yml

@@ -30,7 +30,7 @@ jobs:
     runs-on: [self-hosted, macOS, horizon-parity-main]
     timeout-minutes: 240  # a core-crate batch reruns ~300 harnesses (~60-90 min), a bisect a few rounds of the failures
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.sha }}
           fetch-depth: 0
@@ -69,7 +69,7 @@ jobs:
           python3 tools/parity_main.py bisect "$BASE_SHA" --comment
       - name: Logs of the failed harnesses
         if: steps.harnesses.outcome == 'failure'
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v4
         with:
           name: parity-main-logs
           path: .local/parity-main-logs/

.github/workflows/parity.yml

@@ -20,12 +20,6 @@ on:
           busy the job waits for it.
         type: boolean
         default: false
-      frame_identity:
-        description: >-
-          The pull request carries the frame-identity label: it must leave the picture alone (HDR, shader packs), so
-          the frame_identity harness, which no automatic selection picks, runs too.
-        type: boolean
-        default: false
 permissions:
   contents: read
 env:
@@ -39,7 +33,7 @@ jobs:
     # harnesses at a time) up to a few hours, and any pull request's job may land there.
     timeout-minutes: ${{ inputs.full && 360 || 180 }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           # The commit the event names: a fork's later pushes need another run-parity label. The next step merges
           # main into it.
@@ -93,15 +87,9 @@ jobs:
           PARITY_HOSTS: ''
           BASE_SHA: ${{ steps.merge.outputs.base }}
         run: python3 tools/parity.py --changed "$BASE_SHA" --timeout 2400  # world_spawn takes ~1480 s on a busy runner
-      - name: The pictures this change must leave alone
-        if: ${{ !cancelled() && inputs.frame_identity }}
-        env:
-          PARITY_HOSTS: ''
-          BASE_SHA: ${{ steps.merge.outputs.base }}
-        run: python3 tools/parity.py frame_identity --timeout 2400
       - name: Logs of the failed harnesses
         if: failure()
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v4
         with:
           name: parity-logs
           path: .local/parity-runner/logs/

.github/workflows/pr-labels.yml

@@ -16,15 +16,15 @@ 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
+    # One of playhorizon's small runners, out of GitHub's shared 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: ${{ vars.SELF_HOSTED_CI != 'off' && fromJSON('["self-hosted", "linux", "playhorizon-light"]') || 'ubuntu-latest' }}
     timeout-minutes: 5
     permissions:
       contents: read
       pull-requests: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: main
           persist-credentials: false

.github/workflows/release.yml

@@ -53,7 +53,7 @@ jobs:
       urgent: ${{ steps.decide.outputs.urgent }}
       dry_run: ${{ steps.mode.outputs.dry_run }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - id: mode

.github/workflows/run-parity.yml

@@ -27,4 +27,3 @@ jobs:
       base: ${{ github.event.pull_request.base.sha }}
       head: ${{ github.event.pull_request.head.sha }}
       full: ${{ contains(github.event.pull_request.labels.*.name, 'full-parity') }}
-      frame_identity: ${{ contains(github.event.pull_request.labels.*.name, 'frame-identity') }}

.github/workflows/telemetry-server.yml

@@ -15,23 +15,17 @@ 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:
         working-directory: crates/horizon-telemetry-server
     steps:
-      - uses: actions/checkout@v7
+      - 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' }}

.github/workflows/triage-command.yml

@@ -21,15 +21,14 @@ 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
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
         with:
           ref: main
           persist-credentials: false
@@ -43,8 +42,6 @@ jobs:
           GH_TOKEN: ${{ github.token }}
           BODY: ${{ github.event.comment.body }}
           AUTHOR: ${{ github.event.comment.user.login }}
-          # Who may act is decided by this numeric ID: a login can be claimed by someone else after a rename.
-          AUTHOR_ID: ${{ github.event.comment.user.id }}
           ISSUE: ${{ github.event.issue.number }}
           REPO: ${{ github.repository }}
           COMMENT_URL: ${{ github.event.comment.html_url }}

AGENTS.md

@@ -9,10 +9,8 @@ Feature → files → harness for the most-changed areas: [docs/architecture.md]
 - **Never commit Mojang's files**: game jars, assets, decompiled source, prepared resources (`.local/`).
   `tools/check_public_tree.py` rejects them; `git config core.hooksPath .githooks` runs it on commit.
 - **Keep your runs away from real player data.** Any game or launcher you start gets fresh `mktemp -d`
-  folders in `HORIZON_HOME` (logs, crash reports, telemetry consent, recordings; not saves), `HORIZON_LAUNCHER_HOME`, `XDG_DATA_HOME` and
-  `XDG_CONFIG_HOME`, plus `HORIZON_LAUNCHER_NO_SELF_UPDATE=1` and `HORIZON_NO_AUDIO=1`. Saves, `options.txt` and
-  caches go in the game folder, by default the working directory: start the game from a scratch folder with
-  `--game-dir` pointing at it, or they land in the repo root, hidden by `.gitignore`. For the
+  folders in `HORIZON_HOME` (the game's data), `HORIZON_LAUNCHER_HOME`, `XDG_DATA_HOME` and
+  `XDG_CONFIG_HOME`, plus `HORIZON_LAUNCHER_NO_SELF_UPDATE=1` and `HORIZON_NO_AUDIO=1`, and, for the
   launcher, `HORIZON_LAUNCHER_TRASH`, `HORIZON_LAUNCHER_CLIPBOARD` and `HORIZON_LAUNCHER_DESKTOP` pointing into the scratch home. Never write to
   `~/.local/share/{applications,horizon,horizon-launcher}` or `~/.local/bin`.
 - **Mark what an agent posts.** A PR body starts with a line naming the person whose agent opened it and
@@ -35,7 +33,6 @@ Feature → files → harness for the most-changed areas: [docs/architecture.md]
 - **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.
-- **Controllers reach what registers.** Draw controls with a registering helper (`ui::button`, `settings_shell::foot_button`); `graphics_style::button` and `screen_draw::button` only paint, and registering one part of a screen ends its crosshair, so register all of it.
 
 ## Crates
 
@@ -58,7 +55,6 @@ 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)) |
@@ -107,10 +103,6 @@ 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
@@ -151,7 +143,7 @@ state stays separate from the library tests. This compiles gameplay twice for ex
 |---|---|
 | 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` |
@@ -182,24 +174,28 @@ state stays separate from the library tests. This compiles gameplay twice for ex
 - 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

CONTRIBUTING.md

@@ -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
@@ -124,8 +122,8 @@ it (edited on every push, never repeated): talk to its author in the thread befo
   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)).

Cargo.lock

@@ -329,18 +329,6 @@ dependencies = [
  "syn 3.0.6",
 ]
 
-[[package]]
-name = "byteorder"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
-
-[[package]]
-name = "byteorder-lite"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
-
 [[package]]
 name = "bytes"
 version = "1.12.1"
@@ -379,7 +367,6 @@ version = "0.1.0"
 dependencies = [
  "horizon-mods",
  "serde_json",
- "zip",
 ]
 
 [[package]]
@@ -1223,12 +1210,6 @@ dependencies = [
  "serde_core",
 ]
 
-[[package]]
-name = "heck"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
-
 [[package]]
 name = "hermit-abi"
 version = "0.5.3"
@@ -1285,7 +1266,6 @@ name = "horizon-assets"
 version = "0.1.0"
 dependencies = [
  "horizon-core",
- "log",
  "png",
  "serde",
  "serde_json",
@@ -1324,7 +1304,6 @@ dependencies = [
  "ab_glyph",
  "bytemuck",
  "chrono",
- "dunce",
  "flate2",
  "fs4",
  "gilrs",
@@ -1339,12 +1318,10 @@ dependencies = [
  "horizon-client-render",
  "horizon-command",
  "horizon-core",
- "horizon-cosmetics",
  "horizon-dualsense",
  "horizon-friends",
  "horizon-hdr",
  "horizon-items",
- "horizon-mod-api-gen",
  "horizon-mods",
  "horizon-narrator",
  "horizon-optifine",
@@ -1370,7 +1347,6 @@ dependencies = [
  "serde_json",
  "sha1",
  "sha2",
- "toml",
  "unicode-bidi",
  "ureq",
  "wgpu",
@@ -1408,7 +1384,6 @@ dependencies = [
  "chrono",
  "flate2",
  "fs4",
- "getrandom 0.3.4",
  "gilrs",
  "glam",
  "horizon-anticheat",
@@ -1420,12 +1395,10 @@ dependencies = [
  "horizon-client-render",
  "horizon-command",
  "horizon-core",
- "horizon-cosmetics",
  "horizon-dualsense",
  "horizon-friends",
  "horizon-hdr",
  "horizon-items",
- "horizon-mcp",
  "horizon-mods",
  "horizon-narrator",
  "horizon-optifine",
@@ -1439,7 +1412,6 @@ dependencies = [
  "horizon-world",
  "log",
  "miniz_oxide 0.8.9",
- "mio",
  "naga",
  "objc2 0.6.5",
  "objc2-app-kit 0.3.2",
@@ -1456,7 +1428,6 @@ dependencies = [
  "ureq",
  "wgpu",
  "winit",
- "xxhash-rust",
  "zip",
 ]
 
@@ -1478,10 +1449,8 @@ dependencies = [
  "horizon-client-input",
  "horizon-command",
  "horizon-core",
- "horizon-cosmetics",
  "horizon-hdr",
  "horizon-items",
- "horizon-mod-api-gen",
  "horizon-narrator",
  "horizon-optifine",
  "horizon-protocol",
@@ -1491,9 +1460,7 @@ dependencies = [
  "horizon-theme",
  "horizon-threads",
  "horizon-world",
- "image-webp",
  "log",
- "lz4_flex",
  "miniz_oxide 0.8.9",
  "naga",
  "png",
@@ -1510,7 +1477,6 @@ dependencies = [
  "wgpu",
  "winit",
  "zip",
- "zune-jpeg",
 ]
 
 [[package]]
@@ -1518,7 +1484,6 @@ name = "horizon-command"
 version = "0.1.0"
 dependencies = [
  "horizon-client-core",
- "horizon-core",
  "horizon-protocol",
  "horizon-world",
 ]
@@ -1530,18 +1495,6 @@ dependencies = [
  "libm",
 ]
 
-[[package]]
-name = "horizon-cosmetics"
-version = "0.1.0"
-dependencies = [
- "base64",
- "glam",
- "png",
- "serde",
- "serde_json",
- "ureq",
-]
-
 [[package]]
 name = "horizon-dualsense"
 version = "0.1.0"
@@ -1589,32 +1542,6 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "horizon-mcp"
-version = "0.1.0"
-dependencies = [
- "serde_json",
-]
-
-[[package]]
-name = "horizon-mod-api-gen"
-version = "0.1.0"
-dependencies = [
- "heck",
- "quote",
- "serde",
- "serde_json",
- "syn 2.0.119",
-]
-
-[[package]]
-name = "horizon-mod-api-gen-tests"
-version = "0.1.0"
-dependencies = [
- "horizon-mod-api-gen",
- "serde_json",
-]
-
 [[package]]
 name = "horizon-mods"
 version = "0.1.0"
@@ -1647,7 +1574,6 @@ name = "horizon-optifine"
 version = "0.1.0"
 dependencies = [
  "horizon-bench",
- "horizon-core",
  "log",
  "regex",
 ]
@@ -1687,7 +1613,6 @@ dependencies = [
  "horizon-core",
  "horizon-world",
  "ipconfig",
- "log",
  "serde_json",
  "sha1",
  "sha2",
@@ -1717,15 +1642,12 @@ dependencies = [
  "ab_glyph",
  "base64",
  "chrono",
- "getrandom 0.3.4",
  "horizon-anticheat",
  "horizon-bench",
  "horizon-chat-filter",
  "horizon-core",
- "horizon-mcp",
  "horizon-release-sign",
  "horizon-server-files",
- "horizon-world",
  "libc",
  "p12-keystore",
  "png",
@@ -1811,7 +1733,6 @@ dependencies = [
  "flate2",
  "horizon-core",
  "libm",
- "log",
  "lz4_flex",
  "postcard",
  "serde",
@@ -1958,16 +1879,6 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
-[[package]]
-name = "image-webp"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "525e9ff3e1a4be2fbea1fdf0e98686a6d98b4d8f937e1bf7402245af1909e8c3"
-dependencies = [
- "byteorder-lite",
- "quick-error",
-]
-
 [[package]]
 name = "indexmap"
 version = "2.14.2"
@@ -2191,6 +2102,8 @@ checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
 [[package]]
 name = "libmimalloc-sys"
 version = "0.1.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a45a52f43e1c16f667ccfe4dd8c85b7f7c204fd5e3bf46c5b0db9a5c3c0b8e9"
 dependencies = [
  "cc",
  "cty",
@@ -2328,18 +2241,6 @@ dependencies = [
  "simd-adler32",
 ]
 
-[[package]]
-name = "mio"
-version = "1.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1788edb87fdc09c7e26304471e2f5be8cdefb1b6930d6e3985fc02ff53bf86ee"
-dependencies = [
- "libc",
- "log",
- "wasi",
- "windows-sys 0.61.2",
-]
-
 [[package]]
 name = "multiversion_no_op"
 version = "1.0.0"
@@ -3201,12 +3102,6 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d595e54a326bc53c1c197b32d295e14b169e3cfeaa8dc82b529f947fba6bcf5"
 
-[[package]]
-name = "quick-error"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
-
 [[package]]
 name = "quick-xml"
 version = "0.41.0"
@@ -3722,17 +3617,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "socks"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0c3dbbd9ae980613c6dd8e28a9407b50509d3803b57624d5dfe8315218cd58b"
-dependencies = [
- "byteorder",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "spake2"
 version = "0.4.0"
@@ -4186,7 +4070,6 @@ dependencies = [
  "once_cell",
  "rustls",
  "rustls-pki-types",
- "socks",
  "url",
  "webpki-roots 0.26.11",
 ]
@@ -4649,22 +4532,6 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72069c3113ab32ab29e5584db3c6ec55d416895e60715417b5b883a357c3e471"
 
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
 [[package]]
 name = "winapi-util"
 version = "0.1.11"
@@ -4674,12 +4541,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
 [[package]]
 name = "windows"
 version = "0.54.0"
@@ -5258,8 +5119,10 @@ checksum = "e450f9b2ed1dff33c94c12589a87338689467b9c4f5d8a5710bd09a847d2c8a7"
 name = "xtask"
 version = "0.1.0"
 dependencies = [
- "horizon-mod-api-gen",
  "horizon-theme",
+ "quote",
+ "serde_json",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -5421,18 +5284,3 @@ dependencies = [
  "log",
  "simd-adler32",
 ]
-
-[[package]]
-name = "zune-core"
-version = "0.4.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f423a2c17029964870cfaabb1f13dfab7d092a62a29a89264f4d36990ca414a"
-
-[[package]]
-name = "zune-jpeg"
-version = "0.4.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29ce2c8a9384ad323cf564b67da86e21d3cfdff87908bc1223ed5c99bc792713"
-dependencies = [
- "zune-core",
-]

Cargo.toml

@@ -1,5 +1,5 @@
 [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", "third_party/naga"]
 members = [
     "crates/horizon-core",
     "crates/horizon-dualsense",
@@ -12,14 +12,11 @@ members = [
     "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",
@@ -31,8 +28,6 @@ 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",
@@ -70,10 +65,6 @@ large_enum_variant = "allow"
 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.

README.md

@@ -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>
@@ -30,7 +30,7 @@ Minecraft: Java Edition 26.3, rewritten in Rust. Same worlds, same rules, same t
 
 ## Download
 
-Get **the Horizon launcher** from [playhorizon.dev](https://playhorizon.dev) or [the launcher releases](https://github.com/horizon-rust/horizon/releases?q=launcher&expanded=true) (Linux x86-64, macOS on Apple Silicon, macOS on Intel from the next Nightly, Windows x64). It installs and updates the game, prepares its files from your copy of Minecraft, and updates itself.
+Get **the Horizon launcher** from [playhorizon.dev](https://playhorizon.dev) or [the launcher releases](https://github.com/horizon-rust/horizon/releases?q=launcher-v&expanded=true) (Linux x86-64, macOS on Apple Silicon, macOS on Intel from the next Nightly, Windows x64). It installs and updates the game, prepares its files from your copy of Minecraft, and updates itself.
 
 **You need** a Microsoft account that owns Java Edition ([why](docs/microsoft-account.md)) and a GPU with Vulkan or OpenGL 3.3 (Linux), Vulkan or DirectX 12 (Windows), or a Mac (Apple Silicon, or Intel from the next Nightly). An existing Minecraft install (official launcher, Prism, MultiMC...) is reused; without one, Play downloads 26.3 from Mojang for your account. Step by step: [Install and first launch](https://playhorizon.dev/docs/install).
 
@@ -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 |
 | --- | ---: | --- |

ROADMAP.md

@@ -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>
 
@@ -206,7 +206,7 @@ Manage a server from a console, ban and pardon players, and drive it from other
 
 <details><summary>Technical</summary>
 
-`horizon-server console` (a text interface), `ban`, `pardon`, `ban-ip` and `mcp` over stdio. Admin API additions: the player list, kick, ban, op and whitelist, an SSE stream of logs and events, a text metrics endpoint, config GET and PATCH, backup delete and download. The last pieces merged: bans edited while the server is stopped ([#9767](https://github.com/horizon-rust/horizon/issues/9767)) and the MCP tools' contracts pinned by a test ([#9748](https://github.com/horizon-rust/horizon/issues/9748)). The panel's later features and vanilla's management protocol are their own item (server-panel-management). [docs/server.md](docs/server.md), [docs/api/server.md](docs/api/server.md).
+`horizon-server console` (a text interface), `ban`, `pardon`, `ban-ip` and `mcp` over stdio. Admin API additions: the player list, kick, ban, op and whitelist, an SSE stream of logs and events, a text metrics endpoint, config GET and PATCH, backup delete and download. The panel's later features (bans, worlds, server.properties import, logs and crash reports, modpacks) and vanilla's management protocol (the JSON-RPC over WebSocket that the `management-server-*` keys configure), so vanilla's tools can manage a Horizon server. [docs/server.md](docs/server.md), [docs/api/server.md](docs/api/server.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>
 
@@ -396,16 +396,6 @@ A Datapacks tab beside Mods and Resource packs: install into a chosen world's da
 
 ### Servers and multiplayer
 
-#### Server panel extras and vanilla's management protocol
-
-More of a server managed from its web panel (bans, worlds, logs and crash reports, modpacks), and vanilla's own server-management tools working with a Horizon server.
-
-<details><summary>Technical</summary>
-
-The panel's later features (bans, worlds, server.properties import, logs and crash reports, modpacks) and vanilla's management protocol (the JSON-RPC over WebSocket that the `management-server-*` keys configure), so vanilla's tools can manage a Horizon server. Split from server-admin. [docs/server.md](docs/server.md), [docs/api/server.md](docs/api/server.md).
-
-</details>
-
 #### Ely.by and other sign-in providers
 
 Sign in with other account providers, such as Ely.by or any Yggdrasil-compatible one, beside Microsoft.
@@ -610,6 +600,16 @@ An output device list in Music & Sounds, falling back to the system default. [#1
 
 </details>
 
+#### Play in your language
+
+Item names, container titles and server messages follow the language you pick, as in vanilla. Today parts of the game stay in English.
+
+<details><summary>Technical</summary>
+
+Translatable components resolved through the selected language for items, containers and server text ([#1806](https://github.com/horizon-rust/horizon/issues/1806)), on top of the bundled languages the prepared resources carry ([#1594](https://github.com/horizon-rust/horizon/issues/1594)). Left: the client's own screens ([#1672](https://github.com/horizon-rust/horizon/issues/1672)) and the main menu with zh_cn.
+
+</details>
+
 ### Rendering
 
 #### A light default shader pack
@@ -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.
@@ -860,11 +870,30 @@ More: [https://playhorizon.dev/docs/performance](https://playhorizon.dev/docs/pe
 
 </details>
 
+### Gameplay parity
+
+#### End city banners keep their pattern
+
+Banners in End cities show as plain magenta instead of with their pattern.
+
+<details><summary>Technical</summary>
+
+Compare the banner block entities the End city templates place with vanilla's (`EndCityPieces`, the templates' block entity NBT, `BannerBlockEntity`'s patterns), in `crates/horizon-world/src/worldgen/structure/`. Issue [#1438](https://github.com/horizon-rust/horizon/issues/1438); possibly related: [#526](https://github.com/horizon-rust/horizon/issues/526).
+
+</details>
+
+#### Enchanted loot in End cities
+
+Armour and tools in End city chests should come enchanted, as in vanilla.
+
+<details><summary>Technical</summary>
+
+`loot.rs` implements `enchant_with_levels`: find why the End city chest table's rolls come out bare, and compare them with vanilla's for a few seeds. Issues [#1437](https://github.com/horizon-rust/horizon/issues/1437), [#1660](https://github.com/horizon-rust/horizon/issues/1660).
+
+</details>
+
 ## Recently shipped
 
-- **Enchanted loot in End cities** (v0.2.73): Armour and tools in End city chests should come enchanted, as in vanilla. [#1437](https://github.com/horizon-rust/horizon/issues/1437) · [#1660](https://github.com/horizon-rust/horizon/issues/1660) · [#1911](https://github.com/horizon-rust/horizon/issues/1911) · [#2037](https://github.com/horizon-rust/horizon/issues/2037)
-- **End city banners keep their pattern** (v0.2.67): Banners in End cities show as plain magenta instead of with their pattern. [#1438](https://github.com/horizon-rust/horizon/issues/1438) · [#526](https://github.com/horizon-rust/horizon/issues/526) · [#1928](https://github.com/horizon-rust/horizon/issues/1928)
-- **Play in your language** (v0.2.65): Item names, container titles and server messages follow the language you pick, as in vanilla. Today parts of the game stay in English. [#1806](https://github.com/horizon-rust/horizon/issues/1806) · [#1594](https://github.com/horizon-rust/horizon/issues/1594) · [#1672](https://github.com/horizon-rust/horizon/issues/1672)
 - **Chickens flap while they fall** (v0.2.67): Chickens should flap their wings while they fall, not stand still in the air. [#1706](https://github.com/horizon-rust/horizon/issues/1706) · [#1892](https://github.com/horizon-rust/horizon/issues/1892)
 - **Ctrl+Backspace and scroll bars in menus** (v0.2.67): Ctrl+Backspace should delete a whole word in the creative search, and every list's scroll bar should be draggable. [#1764](https://github.com/horizon-rust/horizon/issues/1764) · [#1782](https://github.com/horizon-rust/horizon/issues/1782) · [#1884](https://github.com/horizon-rust/horizon/issues/1884) · [#1931](https://github.com/horizon-rust/horizon/issues/1931)
 - **A pointing hand over buttons** (v0.2.67): The mouse pointer should turn into a pointing hand over menu buttons, as in vanilla 26.3. [#1347](https://github.com/horizon-rust/horizon/issues/1347) · [#1897](https://github.com/horizon-rust/horizon/issues/1897)
@@ -875,7 +904,6 @@ More: [https://playhorizon.dev/docs/performance](https://playhorizon.dev/docs/pe
 - **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)

THIRD_PARTY_NOTICES.md

@@ -14,20 +14,6 @@ Apache-2.0; both licenses are in that folder (`LICENSE.MIT`, `LICENSE.APACHE`).
 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.
-It also reads a struct member outside a constant expression through a pointer to the member,
-not out of a loaded copy of the whole struct, so a member an atomic function uses can be read.
-
-## 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)
@@ -41,17 +27,6 @@ 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
@@ -66,17 +41,19 @@ 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.
@@ -138,77 +115,3 @@ licensed under the MIT license:
 > 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.
-
-## JOML
-
-`crates/horizon-client-render/src/camera.rs` (`joml::Mat4::rotation`, `invert_orthonormal`) and
-`crates/horizon-client-render/src/gfx/pack_uniforms.rs` (`invert_generic`, `invert_affine`, the
-formulas of `pack_projection` and `shadow_ortho`) adapt the float arithmetic of
-`Matrix4f.rotation(Quaternionfc)`, `invertOrthonormal`, `invertGenericNonThis`, `invertAffine`,
-`setPerspective` and `setOrtho` from
-[JOML](https://github.com/JOML-CI/JOML/tree/faf9eef2511242122beb6055fe3da92daed214c5) 1.10.9, the
-library vanilla 26.3 uses, so that shader packs get the same matrices to the last bit. Changes:
-ported to Rust; the pack_uniforms.rs functions drop JOML's property flags, and
-`pack_projection` works the formula in doubles. The copyright line and license notice also head
-both files.
-
-`camera.rs` also adapts `Quaternionf.rotationX`, `rotationY` and `rotationZ`,
-`Matrix4f.rotateAffine` and `Vector4f.mulAffine` (`joml::Quat::rotation_x`/`_y`/`_z`,
-`joml::Mat4::rotate_affine`, `transform_affine`), for the sky's positions shader packs read.
-Changes: ported to Rust; `rotate_affine` keeps only the affine case.
-
-```
-The MIT License
-
-Copyright (c) 2015-2026 Richard Greenlees
-
-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.
-```

bench/bench.py

@@ -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)

benchmarks/entity-occlusion/2026-11-02/README.md

@@ -1,42 +0,0 @@
-# Entity occlusion split measurements — 2026-11-02
-
-These measurements came from the pre-split integration branch for PR #7054. That build contained the entity-occlusion rewrite and particle light lookup cache; Particle Culling was Off. They are useful comparison evidence, but they are not a benchmark of this isolated entity-only commit. The cache-only run in PR #7391 measured effectively the same CPU time on the ordinary scene, but the combined result still cannot isolate interactions.
-
-Host: Intel Core i7-3770S, Intel HD Graphics 4000, Vulkan/Mesa, 675×727, render distance 4, VSync off, 260 FPS cap. Two opposite-order passes measured for 8 seconds after warmup. Values are means. CPU is harness average CPU ms per frame; p99 is frame time. The driver supplied no usable GPU timing.
-
-## Ordinary scene
-
-The scene had 24 mobs, roughly 9,400–10,100 rain particles and campfire smoke.
-
-| Build and mode | FPS | CPU ms/frame | Frame p99 ms |
-| --- | ---: | ---: | ---: |
-| Main, entity culling Off | 88.59 | 1.829 | 24.51 |
-| Pre-split integration branch, all culling Off | 88.33 | 2.063 | 24.51 |
-| Main, entity culling Synchronous | 89.34 | 1.965 | 23.99 |
-| Pre-split integration branch, entity Synchronous | 89.13 | 2.113 | 24.15 |
-
-This normal-scene run does not show a large FPS change; its CPU differences are small relative to frame time and not attributable to the entity-only change by themselves.
-
-## Opaque-wall scene
-
-A 32×32 platform at Y=300, a 7-block wall with a one-block vertical opening, and 192 pigs spawned behind the wall (216 mobs in the captured scene). The player looked toward the opening from the near side. The same world and camera path were used for the main and integration builds.
-
-| Build and mode | FPS | CPU ms/frame | Frame p99 ms |
-| --- | ---: | ---: | ---: |
-| Main, Off | 89.08 | 2.423 | 13.52 |
-| Integration branch, Off | 89.23 | 2.355 | 13.27 |
-| Main, Synchronous | 92.81 | 2.566 | 14.60 |
-| Integration branch, Synchronous | 93.21 | 2.550 | 12.84 |
-| Main, Asynchronous | 92.73 | 2.364 | 13.04 |
-| Integration branch, Asynchronous | 92.62 | 2.314 | 13.18 |
-
-The asynchronous mode reduced measured CPU time slightly in this wall scene but did not improve FPS beyond run-to-run spread. This is a synthetic occlusion-heavy scene, not a broad performance claim.
-
-## Captures
-
-The HUD performance overlay is visible in each capture. The integration-build screenshots were recorded with the same wall and camera position in Off, Synchronous, and Asynchronous modes.
-
-- Main, Off: `main-off.png`
-- Integration branch, Off: `branch-off.png`
-- Integration branch, Synchronous: `branch-sync.png`
-- Integration branch, Asynchronous: `branch-async.png`

benchmarks/entity-occlusion/2026-11-04-release-opengl/README.md

@@ -1,42 +0,0 @@
-# Entity occlusion pipeline — release/OpenGL run (2026-11-04)
-
-This is the final local smoke benchmark for the entity-occlusion pipeline before opening the PR. It was run from the branch after the release build completed, with the OpenGL backend selected explicitly. The same process created each scene, switched the culling mode, flew the camera for two seconds, collected frame/CPU telemetry, and captured the screenshot after the scene settled.
-
-**Host:** Intel Core i7-3770S, Intel HD Graphics 4000, Mesa OpenGL 4.2
-**Window:** 1280×720, offscreen, VSync disabled
-**World:** fresh temporary home, 32×32 platform at Y=300; wall scenes add a solid stone wall and an optional one-block slit
-**Entities:** 24 pigs in the normal scene, 192 pigs in wall scenes, 512 pigs in stress scenes
-**Settings:** render distance 8, `entityCullingPrecheck:64`, FPS overlay on, no resource-pack occlusion assumptions
-**Build:** `cargo build --release -p horizon-client`
-
-## Results
-
-The values below are branch-only measurements. They are useful for comparing the three modes under identical geometry and for checking that the worker is doing useful work. A fresh main binary was not built in this short pass, so these numbers do not claim a controlled main-to-branch delta.
-
-| Scene | Off FPS / CPU p50 | Sync FPS / CPU p50 | Async FPS / CPU p50 | Async entities culled |
-| --- | ---: | ---: | ---: | ---: |
-| `entity_normal` (24 visible) | 240.5 / 0.586 ms | 233.5 / 0.762 ms | 239.3 / 0.686 ms | 0 |
-| `entity_wall` (192, solid) | 228.8 / 1.245 ms | 318.6 / 1.342 ms | **324.5 / 0.478 ms** | 124,608 |
-| `entity_wall_slit` (192, one-block slit) | 231.4 / 1.102 ms | 265.0 / 1.387 ms | **281.2 / 0.716 ms** | 102,826 |
-| `entity_stress` (512, solid) | 190.3 / 2.467 ms | 299.2 / 2.593 ms | **325.5 / 0.691 ms** | 290,234 |
-| `entity_stress_slit` (512, one-block slit) | 190.4 / 2.476 ms | 262.2 / 2.573 ms | **262.1 / 1.297 ms** | 227,301 |
-
-Async telemetry confirmed that the render thread stayed non-blocking (`try_recv`/`try_send`, `worker_blocking_wait_ms: 0`). The latest wall/slit run completed 562 worker jobs, queued 3,982 queries, avoided about 4.0 million entity bytes, and had 379 ns recent p50 worker-job time. The solid 512-pig run culled 15,552 generated vertices; the slit run culled 120,290 generated vertices. The normal scene recorded no pre-model hides and kept the opt-in path close to Off.
-
-## Captures
-
-Every image includes the FPS performance overlay. The names are `<mode>-<scene>.png`:
-
-- [Off — normal](screenshots/off-entity_normal.png), [wall](screenshots/off-entity_wall.png), [wall slit](screenshots/off-entity_wall_slit.png), [stress](screenshots/off-entity_stress.png), [stress slit](screenshots/off-entity_stress_slit.png)
-- [Sync — normal](screenshots/sync-entity_normal.png), [wall](screenshots/sync-entity_wall.png), [wall slit](screenshots/sync-entity_wall_slit.png), [stress](screenshots/sync-entity_stress.png), [stress slit](screenshots/sync-entity_stress_slit.png)
-- [Async — normal](screenshots/async-entity_normal.png), [wall](screenshots/async-entity_wall.png), [wall slit](screenshots/async-entity_wall_slit.png), [stress](screenshots/async-entity_stress.png), [stress slit](screenshots/async-entity_stress_slit.png)
-
-## Reproduction
-
-From the repository root, with prepared 26.3 resources available:
-
-```sh
-python3 tools/entity_occlusion_bench.py
-```
-
-The script uses fresh temporary game data, the release binary in `target/release`, OpenGL, the FPS overlay, and writes JSON plus captures under `/tmp/horizon-entity-occlusion-release-quick/`.

benchmarks/particle-culling/2026-11-02/README.md

@@ -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`

benchmarks/perf/horizon-desktop-rd12.json

@@ -1,870 +0,0 @@
-{
- "format": "horizon-benchmark-report",
- "version": 1,
- "kind": "game",
- "created": "2026-11-04T13:00:15Z",
- "app": {
-  "name": "horizon-client",
-  "version": "nightly-2026-11-04-67dad0d",
-  "commit": "67dad0d"
- },
- "hardware": {
-  "os": "linux",
-  "arch": "x86_64",
-  "cpu_threads": 24,
-  "os_version": "NixOS 26.05 (Yarara) (kernel 6.18.57)",
-  "cpu": "13th Gen Intel(R) Core(TM) i7-13700KF",
-  "ram_mb": 31904,
-  "gpu": {
-   "name": "NVIDIA GeForce RTX 4080",
-   "vendor": "nvidia",
-   "driver": "NVIDIA 595.71.05",
-   "backend": "vulkan",
-   "kind": "discrete"
-  }
- },
- "conditions": {
-  "scenario": "perf_bench:village,forest,ocean,mountain",
-  "seed": "1234",
-  "render_distance": 12,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": false,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 28.408,
-  "window": [
-   1280,
-   720
-  ]
- },
- "metrics": {
-  "startup.title_ms": {
-   "n": 3,
-   "mean": 66658.183,
-   "stdev": 61839.502,
-   "min": 1827.42,
-   "max": 124993.694,
-   "ci95": 153630.237
-  },
-  "startup.world_ms": {
-   "n": 3,
-   "mean": 74754.411,
-   "stdev": 59189.587,
-   "min": 13600.651,
-   "max": 131761.773,
-   "ci95": 147046.952
-  },
-  "chunks.village.load_ms": {
-   "n": 3,
-   "mean": 5571.499,
-   "stdev": 1900.32,
-   "min": 3378.38,
-   "max": 6730.394,
-   "ci95": 4721.037
-  },
-  "chunks.village.meshed_count": {
-   "n": 3,
-   "mean": 15287.0,
-   "stdev": 527.501,
-   "min": 14788.0,
-   "max": 15839.0,
-   "ci95": 1310.49
-  },
-  "fps.village.avg_fps": {
-   "n": 3,
-   "mean": 2958.557,
-   "stdev": 376.543,
-   "min": 2526.453,
-   "max": 3216.434,
-   "ci95": 935.46
-  },
-  "fps.village.low_1pct_fps": {
-   "n": 3,
-   "mean": 368.457,
-   "stdev": 90.668,
-   "min": 300.631,
-   "max": 471.438,
-   "ci95": 225.25
-  },
-  "fps.village.low_01pct_fps": {
-   "n": 3,
-   "mean": 91.04,
-   "stdev": 40.506,
-   "min": 46.124,
-   "max": 124.796,
-   "ci95": 100.63
-  },
-  "memory.village.gpu_mb": {
-   "n": 3,
-   "mean": 581.0,
-   "stdev": 48.0,
-   "min": 533.0,
-   "max": 629.0,
-   "ci95": 119.248
-  },
-  "memory.village.rss_mb": {
-   "n": 3,
-   "mean": 1277.531,
-   "stdev": 25.546,
-   "min": 1253.879,
-   "max": 1304.623,
-   "ci95": 63.466
-  },
-  "tick.village.client_ms": {
-   "n": 3,
-   "mean": 0.529,
-   "stdev": 0.127,
-   "min": 0.396,
-   "max": 0.649,
-   "ci95": 0.315
-  },
-  "cpu.village.p50_ms": {
-   "n": 3,
-   "mean": 0.185,
-   "stdev": 0.034,
-   "min": 0.162,
-   "max": 0.224,
-   "ci95": 0.085
-  },
-  "chunks.forest.load_ms": {
-   "n": 3,
-   "mean": 3318.3,
-   "stdev": 911.608,
-   "min": 2266.627,
-   "max": 3883.075,
-   "ci95": 2264.743
-  },
-  "chunks.forest.meshed_count": {
-   "n": 3,
-   "mean": 16565.333,
-   "stdev": 172.755,
-   "min": 16367.0,
-   "max": 16683.0,
-   "ci95": 429.182
-  },
-  "fps.forest.avg_fps": {
-   "n": 3,
-   "mean": 2333.626,
-   "stdev": 569.124,
-   "min": 1745.365,
-   "max": 2881.457,
-   "ci95": 1413.897
-  },
-  "fps.forest.low_1pct_fps": {
-   "n": 3,
-   "mean": 336.615,
-   "stdev": 185.666,
-   "min": 208.133,
-   "max": 549.487,
-   "ci95": 461.257
-  },
-  "fps.forest.low_01pct_fps": {
-   "n": 3,
-   "mean": 160.734,
-   "stdev": 127.586,
-   "min": 39.777,
-   "max": 294.05,
-   "ci95": 316.967
-  },
-  "memory.forest.gpu_mb": {
-   "n": 3,
-   "mean": 666.333,
-   "stdev": 24.44,
-   "min": 645.0,
-   "max": 693.0,
-   "ci95": 60.718
-  },
-  "memory.forest.rss_mb": {
-   "n": 3,
-   "mean": 1346.816,
-   "stdev": 42.279,
-   "min": 1305.547,
-   "max": 1390.037,
-   "ci95": 105.035
-  },
-  "tick.forest.client_ms": {
-   "n": 3,
-   "mean": 0.669,
-   "stdev": 0.084,
-   "min": 0.598,
-   "max": 0.761,
-   "ci95": 0.208
-  },
-  "cpu.forest.p50_ms": {
-   "n": 3,
-   "mean": 0.222,
-   "stdev": 0.032,
-   "min": 0.197,
-   "max": 0.258,
-   "ci95": 0.079
-  },
-  "chunks.ocean.load_ms": {
-   "n": 3,
-   "mean": 2463.434,
-   "stdev": 1056.0,
-   "min": 1527.516,
-   "max": 3608.283,
-   "ci95": 2623.462
-  },
-  "chunks.ocean.meshed_count": {
-   "n": 3,
-   "mean": 14226.667,
-   "stdev": 307.077,
-   "min": 14038.0,
-   "max": 14581.0,
-   "ci95": 762.883
-  },
-  "fps.ocean.avg_fps": {
-   "n": 3,
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-   "stdev": 1320.904,
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benchmarks/perf/horizon-desktop-rd32.json

@@ -1,870 +0,0 @@
-{
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- "version": 1,
- "kind": "game",
- "created": "2026-11-04T14:47:19Z",
- "app": {
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-  "commit": "67dad0d"
- },
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-  "ram_mb": 31904,
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-   "vendor": "nvidia",
-   "driver": "NVIDIA 595.71.05",
-   "backend": "vulkan",
-   "kind": "discrete"
-  }
- },
- "conditions": {
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-  "seed": "1234",
-  "render_distance": 32,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": false,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 29.665,
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benchmarks/perf/horizon-macmini-rd12.json

@@ -1,854 +0,0 @@
-{
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- "version": 1,
- "kind": "game",
- "created": "2026-11-04T12:44:40Z",
- "app": {
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-  "commit": "67dad0d"
- },
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-  "os_version": "27.0.1",
-  "cpu": "Apple M4 Pro",
-  "ram_mb": 65536,
-  "gpu": {
-   "name": "Apple M4 Pro",
-   "vendor": "",
-   "driver": "",
-   "backend": "metal",
-   "kind": "integrated"
-  }
- },
- "conditions": {
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-  "seed": "1234",
-  "render_distance": 12,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": true,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 17.39,
-  "window": [
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benchmarks/perf/horizon-macmini-rd32.json

@@ -1,854 +0,0 @@
-{
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- "version": 1,
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- "created": "2026-11-04T13:17:26Z",
- "app": {
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-  "commit": "67dad0d"
- },
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-  "os_version": "27.0.1",
-  "cpu": "Apple M4 Pro",
-  "ram_mb": 65536,
-  "gpu": {
-   "name": "Apple M4 Pro",
-   "vendor": "",
-   "driver": "",
-   "backend": "metal",
-   "kind": "integrated"
-  }
- },
- "conditions": {
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-  "seed": "1234",
-  "render_distance": 32,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": true,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 17.712,
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-   "gpu_p50_ms": 3.667,
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-}

benchmarks/perf/site-2026-11-04.md

@@ -1,42 +0,0 @@
-# Horizon Nightly 2026-11-04 vs vanilla 26.3 on the Mac mini and the desktop (2026-11-04)
-
-> **The Mac mini reports (`*-macmini-rd*.json`) are offscreen, not comparable.** Horizon rendered offscreen (no presenting)
-> while vanilla drew into a window, so the Mac rows below are not a Horizon-vs-vanilla comparison, and the website does not
-> publish them: it keeps the Mac mini's 2026-10-22 runs. They are kept here only as a record of that day's offscreen run.
-
-The desktop runs are the ones behind playhorizon.dev/benchmarks as of 2026-11-04 (horizon-rust/horizon-site#58): `tools/perf_bench.py`
-reports, render distance 12 and 32, three games each, every game from a fresh world (seed 1234), 1280x720, VSync off. Files:
-`{horizon,vanilla}-macmini-rd{12,32}.json` and `{horizon,vanilla}-desktop-rd{12,32}.json` next to this page.
-
-## Builds
-
-- **Horizon:** the Nightly 2026-11-04 release bundle (67dad0d), as the launcher installs it: macOS arm64 on the Mac,
-  Linux x86_64 on the desktop. Its resources come from the bundle's own `horizon-prepare`. perf_bench ran from main
-  a55b9a2e52 and wrote that checkout's crate version and commit; `app.version` and `app.commit` were set to the bundle's by hand.
-- **Vanilla:** the 26.3 client jar with Fabric Loader and the driver mod, Java 25, the official launcher's JVM flags.
-
-## Machines and conditions
-
-- **Mac mini, Apple M4 Pro (14 cores, 20-core GPU), macOS: offscreen, not comparable.** The session was locked, so Horizon ran `--offscreen`: a locked
-  session gives a window no frames, and windowed Horizon measured 0 FPS. Vanilla drew into its window. Offscreen skips
-  presenting, which favours Horizon, so its averages aren't held at the 144 Hz display as they were on 2026-10-22. Each game
-  started at a 1-minute load of 17-18 (the run waited for < 20); during the runs the load rose to 30-50.
-- **Desktop, RTX 4080 + i7-13700KF, NixOS, NVIDIA 595.** Both games drew into a headless sway rendering on the RTX 4080 (never
-  on its screen), both through Wayland on Vulkan. Vanilla went through SDL's Wayland driver: through Xwayland each of its
-  frames took about 2 s on this day. The machine also runs CI and agents' builds: each game started at a load of 28-30 on
-  24 threads (the run waited for < 30) and the load rose to 40-70 during the runs. Vanilla at RD 32 crashed twice under that
-  load (`GPU timeout attempting to acquire next frame`) before a third series finished. Start-up times are inflated by the
-  load and by a cold disk on each series' first start (start → world up to 130-235 s).
-- **Order:** RD 12 ran Horizon then vanilla; RD 32 ran vanilla then Horizon.
-
-## Results (average over the flights of the three games; FPS average / 1% low)
-
-| Machine | RD | Horizon | Vanilla | Horizon ÷ vanilla (avg, 1% low) |
-|---|---|---|---|---|
-| Mac mini (**offscreen, not comparable**) | 12 | 774 / 294 | 132 / 27 | — |
-| Mac mini (**offscreen, not comparable**) | 32 | 297 / 159 | 68 / 16 | — |
-| Desktop | 12 | 2,224 / 308 | 1,824 / 201 | 1.2x, 1.5x |
-| Desktop | 32 | 800 / 140 | 696 / 64 | 1.15x, 2.2x |
-
-Neither machine was idle, so these say how both games behave on busy machines. They are not clean ratios; for those, see
-`windows-9800x3d-5080-2026-10-29.md`. The scripts and logs are in horizon-parity `shots/site-bench-2026-11-04/`.

benchmarks/perf/vanilla-desktop-rd12.json

@@ -1,787 +0,0 @@
-{
- "format": "horizon-benchmark-report",
- "version": 1,
- "kind": "game",
- "created": "2026-11-04T13:28:55Z",
- "app": {
-  "name": "minecraft",
-  "version": "26.3",
-  "mods": [
-   {
-    "name": "fabric-loader",
-    "version": "0.19.5"
-   }
-  ]
- },
- "hardware": {
-  "os": "linux",
-  "arch": "x86_64",
-  "cpu_threads": 24,
-  "os_version": "NixOS 26.05 (Yarara) (kernel 6.18.57)",
-  "cpu": "13th Gen Intel(R) Core(TM) i7-13700KF",
-  "ram_mb": 31904,
-  "gpu": {
-   "name": "NVIDIA GeForce RTX 4080",
-   "vendor": "NVIDIA",
-   "driver": "1.4.329 NVIDIA 595.71.05",
-   "backend": "vulkan",
-   "kind": ""
-  }
- },
- "conditions": {
-  "scenario": "perf_bench:village,forest,ocean,mountain",
-  "seed": "1234",
-  "render_distance": 12,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": false,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 28.788,
-  "window": [
-   1280,
-   720
-  ]
- },
- "metrics": {
-  "startup.title_ms": {
-   "n": 3,
-   "mean": 121075.467,
-   "stdev": 30646.429,
-   "min": 93272.034,
-   "max": 153935.834,
-   "ci95": 76136.094
-  },
-  "startup.world_ms": {
-   "n": 3,
-   "mean": 191063.8,
-   "stdev": 34368.16,
-   "min": 153895.533,
-   "max": 221692.034,
-   "ci95": 85382.134
-  },
-  "chunks.village.load_ms": {
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benchmarks/perf/vanilla-desktop-rd32.json

@@ -1,787 +0,0 @@
-{
- "format": "horizon-benchmark-report",
- "version": 1,
- "kind": "game",
- "created": "2026-11-04T15:46:25Z",
- "app": {
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- },
- "hardware": {
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-  "arch": "x86_64",
-  "cpu_threads": 24,
-  "os_version": "NixOS 26.05 (Yarara) (kernel 6.18.57)",
-  "cpu": "13th Gen Intel(R) Core(TM) i7-13700KF",
-  "ram_mb": 31904,
-  "gpu": {
-   "name": "NVIDIA GeForce RTX 4080",
-   "vendor": "NVIDIA",
-   "driver": "1.4.329 NVIDIA 595.71.05",
-   "backend": "vulkan",
-   "kind": ""
-  }
- },
- "conditions": {
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-  "seed": "1234",
-  "render_distance": 32,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": false,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 28.799,
-  "window": [
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benchmarks/perf/vanilla-macmini-rd12.json

@@ -1,771 +0,0 @@
-{
- "format": "horizon-benchmark-report",
- "version": 1,
- "kind": "game",
- "created": "2026-11-04T12:54:29Z",
- "app": {
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- },
- "hardware": {
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-  "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": {
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-  "seed": "1234",
-  "render_distance": 12,
-  "simulation_distance": 12,
-  "vsync": false,
-  "offscreen": false,
-  "repeats": 3,
-  "warmup_s": 2.0,
-  "load_avg_1m": 17.628,
-  "window": [
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benchmarks/perf/vanilla-macmini-rd32.json

@@ -1,771 +0,0 @@
-{
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- "version": 1,
- "kind": "game",
- "created": "2026-11-04T13:08:37Z",
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-  "os_version": "27.0.1",
-  "cpu": "Apple M4 Pro",
-  "ram_mb": 65536,
-  "gpu": {
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-   "vendor": "Apple",
-   "driver": "4.1 Metal - 91.7",
-   "backend": "opengl",
-   "kind": ""
-  }
- },
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-  "vsync": false,
-  "offscreen": false,
-  "repeats": 3,
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-  "load_avg_1m": 18.159,
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-   "seconds": 12.003,
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-   "low_1pct_fps": 5.875,
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- ],
- "label": "vanilla-macmini"
-}

clippy.toml

@@ -1,5 +0,0 @@
-# `keys.contains(&KeyCode::ShiftLeft)` reads a mapping by its default key: ask by `Action`, so the
-# mapping is named and every device that can hold it counts.
-disallowed-methods = [
-    { path = "horizon_client_input::held::HeldKeys::contains", reason = "use `held(Action::..)`, or `raw` for a key that is no mapping's default", allow-invalid = true },
-]

crates/cargo-horizon-mod/Cargo.toml

@@ -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

crates/cargo-horizon-mod/src/check.rs

@@ -93,7 +93,7 @@ pub fn kind_of(path: &Path) -> Option<Kind> {
         "hmod" => Some(Kind::Mod),
         "hnmod" => Some(Kind::NativeMod),
         "hpack" => Some(Kind::Modpack),
-        "zip" => Some(horizon_mods::index::zip_kind(path)),
+        "zip" => Some(Kind::ResourcePack),
         "hshader" => Some(Kind::Shader),
         _ => None,
     }

crates/cargo-horizon-mod/src/main.rs

@@ -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();
-    }
 }

crates/cargo-horizon-mod/template/native/api.toml

@@ -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} }

crates/cargo-horizon-mod/template/native/horizon-mixin.toml

@@ -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"

crates/cargo-horizon-mod/template/native/lib.rs

@@ -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));
-    }
-}

crates/horizon-assets/Cargo.toml

@@ -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"] }
 

crates/horizon-assets/src/bake.rs

@@ -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);
-    }
-}

crates/horizon-assets/src/item_model.rs

@@ -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;

crates/horizon-assets/src/item_model/foreign.rs

@@ -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,
-        },
-    }
-}

crates/horizon-assets/src/item_model/foreign_tests.rs

@@ -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
-    ));
-}

crates/horizon-assets/src/item_model/special.rs

@@ -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);

crates/horizon-assets/src/item_model/tests.rs

@@ -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"));
-}

crates/horizon-assets/src/json.rs

@@ -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())?)
 }

crates/horizon-assets/src/lib.rs

@@ -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;
 

crates/horizon-assets/src/model.rs

@@ -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()?,
         })
     }
 }

crates/horizon-assets/src/obj.rs

@@ -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"));
-    }
-}

crates/horizon-assets/src/resolve.rs

@@ -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> {
@@ -137,15 +100,8 @@ 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.
@@ -166,15 +122,13 @@ impl ModelLibrary {
         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)
+        self.resolve_chain(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.
@@ -209,40 +163,28 @@ impl ModelLibrary {
         name: &str,
         child: &BTreeMap<String, TextureSlot>,
     ) -> Result<ResolvedCuboidModel> {
-        self.resolve_name(name, Some(child))
+        self.resolve_chain(name, Some(child))
     }
-    fn resolve_name(
+    fn resolve_chain(
         &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 name = identifier(name)?;
         let mut visited = BTreeSet::new();
-        while let Some(name) = next.take() {
+        let mut chain = Vec::new();
+        let mut names = Vec::new();
+        loop {
             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 +194,10 @@ 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 +216,13 @@ 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 +264,12 @@ 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 +283,12 @@ 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 +298,10 @@ 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 +315,6 @@ pub fn missing_model() -> CuboidModel {
                 }),
             ),
         ]),
-        visibility: BTreeMap::new(),
     }
 }
 
@@ -734,96 +568,4 @@ mod tests {
         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)
-        );
-    }
 }

crates/horizon-bots/src/main.rs

@@ -14,8 +14,7 @@
 //!
 //!   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
@@ -103,8 +102,6 @@ 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)]
@@ -180,8 +177,6 @@ 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,
 }
@@ -212,7 +207,6 @@ fn options() -> Result<Options, String> {
         click: None,
         name: "Bot".into(),
         report: None,
-        capture: None,
         brand: None,
         timer: 1.0,
     };
@@ -262,7 +256,6 @@ fn options() -> Result<Options, String> {
             "--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(',') {
@@ -826,53 +819,12 @@ 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 +848,6 @@ 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() {
@@ -1058,10 +1007,7 @@ fn run_bot(
     {
         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, track));
     }
     use ids::play::serverbound as sb;
     // Wait for the spawn position.
@@ -1079,10 +1025,6 @@ 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, |_| {}));

crates/horizon-chat-filter/src/lib.rs

@@ -125,11 +125,7 @@ impl Filter {
                     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));
-                }
+                f.allowed.push((normalise::word(word), prefix));
                 continue;
             }
             let (kind, word) = match line.as_bytes()[0] {
@@ -243,19 +239,8 @@ impl Action {
 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)
-    }
+    /// Epoch milliseconds.
+    pub until: i64,
 }
 
 #[derive(Default, Serialize, Deserialize)]
@@ -327,38 +312,12 @@ impl Guard {
         )
     }
 
-    /// 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();
+    /// When the player's mute ends, if they are muted at `now`.
+    pub fn muted_until(&self, uuid: u128, now: i64) -> Option<i64> {
+        self.mutes
+            .get(&uuid)
+            .map(|m| m.until)
+            .filter(|&until| until > now)
     }
 
     /// A hit by the player at `now`: the hit's number in the window, and what it leads to.
@@ -384,24 +343,15 @@ impl Guard {
             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();
-            }
+            self.mutes.insert(
+                uuid,
+                Mute {
+                    uuid: uuid_string(uuid),
+                    name: name.to_owned(),
+                    until,
+                },
+            );
+            self.save();
             Action::Muted { until }
         } else {
             Action::Refused
@@ -427,7 +377,7 @@ impl Guard {
             return;
         };
         let now = now_millis();
-        self.mutes.retain(|_, m| m.active(now));
+        self.mutes.retain(|_, m| m.until > 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 }) {
@@ -474,55 +424,6 @@ pub fn append_log(path: &Path, line: &str) -> std::io::Result<()> {
     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()
-}
-
-/// The unit used when presenting a moderation duration to a player.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum DurationUnit {
-    Minute,
-    Hour,
-    Day,
-}
-
-/// A duration's rounded count and unit, shared by logs and translated replies.
-pub fn duration_parts(millis: i64) -> (i64, DurationUnit) {
-    let (unit, kind) = if millis <= 60 * MINUTE {
-        (MINUTE, DurationUnit::Minute)
-    } else if millis <= 48 * 60 * MINUTE {
-        (60 * MINUTE, DurationUnit::Hour)
-    } else {
-        (24 * 60 * MINUTE, DurationUnit::Day)
-    };
-    (
-        millis.div_euclid(unit) + i64::from(millis.rem_euclid(unit) > 0),
-        kind,
-    )
-}
-
-/// `millis` for logs, rounded up: minutes up to an hour, hours up to two days, then days.
-pub fn duration_text(millis: i64) -> String {
-    let (count, unit) = duration_parts(millis);
-    let unit = match unit {
-        DurationUnit::Minute => "minute",
-        DurationUnit::Hour => "hour",
-        DurationUnit::Day => "day",
-    };
-    format!("{count} {unit}{}", if count == 1 { "" } else { "s" })
-}
-
 pub fn now_millis() -> i64 {
     std::time::SystemTime::now()
         .duration_since(std::time::UNIX_EPOCH)

crates/horizon-chat-filter/src/tests.rs

@@ -120,14 +120,14 @@ 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);
+    assert_eq!(g.muted_until(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);
+    assert_eq!(g.muted_until(id, NOW + 4 * MIN), Some(until));
+    assert_eq!(g.muted_until(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),
@@ -190,83 +190,15 @@ fn mutes_survive_a_restart_and_unmute_lifts_them() {
     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!(again.muted_until(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);
+    assert_eq!(again.muted_until(5, now), 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);
+    assert_eq!(reloaded.muted_until(5, now), None);
     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 {
@@ -319,27 +251,3 @@ fn a_message_costs_little() {
     }
     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}");
-    }
-}
-
-#[test]
-fn duration_parts_preserve_rounding_without_overflow() {
-    for (millis, expected) in [
-        (1, (1, DurationUnit::Minute)),
-        (60_000, (1, DurationUnit::Minute)),
-        (61_000, (2, DurationUnit::Minute)),
-        (3_600_000, (60, DurationUnit::Minute)),
-        (3_600_001, (2, DurationUnit::Hour)),
-        (172_800_000, (48, DurationUnit::Hour)),
-        (172_800_001, (3, DurationUnit::Day)),
-        (i64::MAX, (106_751_991_168, DurationUnit::Day)),
-    ] {
-        assert_eq!(duration_parts(millis), expected);
-    }
-}

crates/horizon-client-core/src/block_entity_nbt.rs

@@ -143,9 +143,7 @@ impl<'a> Fields<'a> {
     /// `RandomizableContainer.tryLoadLootTable` / `trySaveLootTable`; true when the
     /// block entity has a loot table (and so saves no items).
     fn loot_table(&mut self) -> bool {
-        let Some(table) =
-            text(self.input.get("LootTable")).and_then(|id| crate::identifier::normalize_id(&id))
-        else {
+        let Some(table) = text(self.input.get("LootTable")) else {
             return false;
         };
         self.put("LootTable", string(&table));
@@ -907,16 +905,6 @@ mod tests {
         assert_eq!(out.get("LootTable"), Some(&string("minecraft:chests/x")));
     }
 
-    #[test]
-    fn invalid_loot_table_leaves_items_intact() {
-        let out = canon(
-            "{id:\"minecraft:barrel\",x:1,y:2,z:3,LootTable:\"INVALID TABLE\",\
-             Items:[{Slot:0b,id:\"minecraft:stone\",count:1}]}",
-        );
-        assert!(out.get("Items").is_some());
-        assert!(out.get("LootTable").is_none());
-    }
-
     #[test]
     fn items_are_validated_and_sorted_by_slot() {
         let out = canon(

crates/horizon-client-core/src/component.rs

@@ -207,17 +207,15 @@ fn style_flag(v: Option<&Value>) -> Option<bool> {
     }
 }
 
-/// ExtraCodecs.UNTRUSTED_URI / Util.parseAndValidateUntrustedUri: http and
-/// https only, scheme case-insensitive. Every `open_url` a server sends must
-/// pass it: anything else (`file:`, a UNC path, a custom protocol handler)
-/// could start a program through the system's URL handler.
-pub fn untrusted_http_url(url: &str) -> bool {
+fn untrusted_http_url(url: &str) -> bool {
+    // ExtraCodecs.UNTRUSTED_URI / Util.parseAndValidateUntrustedUri: http and
+    // https only, scheme case-insensitive.
     url.split_once(':').is_some_and(|(scheme, _)| {
         scheme.eq_ignore_ascii_case("http") || scheme.eq_ignore_ascii_case("https")
     })
 }
 
-/// `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);
@@ -251,13 +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,
     }
 }
@@ -266,7 +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"));
@@ -309,13 +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() {
@@ -498,33 +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});
@@ -625,63 +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, _) =
@@ -721,15 +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");
-    }
 }

crates/horizon-client-core/src/gamerules.rs

@@ -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<()> {

crates/horizon-client-core/src/lang.rs

@@ -79,243 +79,9 @@ 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")
             }
@@ -388,36 +154,6 @@ pub fn apply_deprecated(map: &mut HashMap<String, String>, json: &[u8]) {
     }
 }
 
-/// `Language.loadFromJson` for one `lang/<code>.json`: its entries go into `map` in file order.
-/// A file that is plain JSON reads as before; any other goes through Gson's lenient reader
-/// (`#`, `//` and `/* */` comments, unquoted or single-quoted names and values, raw control
-/// characters in strings, `=` or `=>` and `;`), which vanilla reads lang files with (expected
-/// from `Language.loadFromJson`, Gson). A file that is not JSON even so adds nothing; a value
-/// that is not a string, number or boolean (`GsonHelper.convertToString`) ends the file there.
-fn read_lang_file(bytes: &[u8], map: &mut HashMap<String, String>) {
-    use horizon_world::datafix::json::{Json, parse_lenient};
-    if let Ok(entries) = serde_json::from_slice::<HashMap<String, String>>(bytes) {
-        map.extend(entries);
-        return;
-    }
-    let text = String::from_utf8_lossy(bytes);
-    // Gson's JsonReader skips a leading byte order mark.
-    let text = text.strip_prefix('\u{feff}').unwrap_or(&text);
-    let utf16: Vec<u16> = text.encode_utf16().collect();
-    let Some(Json::Obj(entries)) = parse_lenient(&utf16) else {
-        return;
-    };
-    for (key, value) in entries {
-        let value = match value {
-            Json::Str(s) => String::from_utf16_lossy(&s),
-            Json::Num(n) => n,
-            Json::Bool(b) => b.to_string(),
-            Json::Null | Json::Arr(_) | Json::Obj(_) => break,
-        };
-        map.insert(String::from_utf16_lossy(&key), value);
-    }
-}
-
 impl Language {
     /// ClientLanguage.loadFrom: en_us first, then the selected language, each
     /// from every namespace and every source in priority order (later sources
@@ -443,7 +179,9 @@ impl Language {
                     else {
                         continue;
                     };
-                    read_lang_file(&bytes, &mut map);
+                    if let Ok(entries) = serde_json::from_slice::<HashMap<String, String>>(&bytes) {
+                        map.extend(entries);
+                    }
                 }
             }
         }
@@ -903,165 +641,4 @@ mod tests {
             ["en_us", "fr_fr"]
         );
     }
-
-    fn read(body: &str) -> HashMap<String, String> {
-        let mut map = HashMap::new();
-        read_lang_file(body.as_bytes(), &mut map);
-        map
-    }
-    fn entries(pairs: &[(&str, &str)]) -> HashMap<String, String> {
-        pairs
-            .iter()
-            .map(|(k, v)| ((*k).to_owned(), (*v).to_owned()))
-            .collect()
-    }
-
-    #[test]
-    fn a_plain_json_lang_file_reads_as_before() {
-        let body = "{\"a\": \"Apple \\\"quoted\\\" \\u00e9\", \"b\": \"\", \"a\": \"Again\"}";
-        let strict: HashMap<String, String> = serde_json::from_str(body).unwrap();
-        assert_eq!(read(body), strict);
-        assert_eq!(read(body), entries(&[("a", "Again"), ("b", "")]));
-    }
-
-    #[test]
-    fn lang_files_read_with_comments() {
-        let want = entries(&[("a", "Apple"), ("b", "Banana # not a comment // either")]);
-        for body in [
-            "# header\n{\n# a comment\n\"a\": \"Apple\",\n\"b\": \"Banana # not a comment // either\"\n}\n",
-            "// header\n{\"a\": \"Apple\", // after\n\"b\": \"Banana # not a comment // either\"}",
-            "/* header\n over lines */{\"a\": /* inline */ \"Apple\", \"b\": \"Banana # not a comment // either\"}",
-        ] {
-            assert_eq!(read(body), want, "{body}");
-        }
-    }
-
-    #[test]
-    fn lang_files_read_unquoted_and_single_quoted_names_and_values() {
-        assert_eq!(
-            read("{a: 'Apple', 'b': \"Banana\", c: Cherry}"),
-            entries(&[("a", "Apple"), ("b", "Banana"), ("c", "Cherry")])
-        );
-        // A single-quoted string may hold a double quote, and the reverse.
-        assert_eq!(
-            read("{'a': 'say \"hi\"', \"b\": \"it's\"}"),
-            entries(&[("a", "say \"hi\""), ("b", "it's")])
-        );
-    }
-
-    #[test]
-    fn lang_files_read_raw_control_characters_in_strings() {
-        assert_eq!(
-            read("{\"a\": \"tab\there\", \"b\": \"two\nlines\"}"),
-            entries(&[("a", "tab\there"), ("b", "two\nlines")])
-        );
-    }
-
-    #[test]
-    fn lang_files_read_gson_separators_and_a_byte_order_mark() {
-        assert_eq!(
-            read("\u{feff}{\"a\" = \"Apple\"; \"b\" => \"Banana\"}"),
-            entries(&[("a", "Apple"), ("b", "Banana")])
-        );
-        // A trailing comma before `}` is not JSON even to Gson's lenient reader.
-        assert_eq!(read("{# c\n\"a\": \"Apple\",}"), HashMap::new());
-    }
-
-    #[test]
-    fn numbers_and_booleans_read_as_their_text() {
-        // GsonHelper.convertToString: a primitive reads as its text.
-        assert_eq!(
-            read("{\"a\": 1.50, \"b\": true, \"c\": -2e3}"),
-            entries(&[("a", "1.50"), ("b", "true"), ("c", "-2e3")])
-        );
-    }
-
-    #[test]
-    fn a_value_that_is_no_text_ends_the_file_there() {
-        assert_eq!(
-            read("# c\n{\"a\": \"Apple\", \"b\": [\"x\"], \"c\": \"Cherry\"}"),
-            entries(&[("a", "Apple")])
-        );
-        assert_eq!(read("{\"a\": null, \"b\": \"Banana\"}"), HashMap::new());
-    }
-
-    #[test]
-    fn a_lang_file_that_is_not_json_adds_nothing() {
-        for body in [
-            "# c\n{\"a\": \"Apple\"",
-            "[\"a\"]",
-            "\"a\"",
-            "",
-            "{\"a\": \"Apple\"} {",
-        ] {
-            assert_eq!(read(body), HashMap::new(), "{body:?}");
-        }
-    }
-
-    #[test]
-    fn a_pack_lang_file_with_comments_layers_over_english() {
-        let base = Mem(HashMap::from([(
-            "assets/minecraft/lang/en_us.json".into(),
-            br#"{"a":"Apple","b":"Banana"}"#.to_vec(),
-        )]));
-        let pack = Mem(HashMap::from([(
-            "assets/minecraft/lang/fr_fr.json".into(),
-            b"{\n# Fruits\n\"a\": \"Pomme\"\n}\n".to_vec(),
-        )]));
-        let sources: [&dyn ResourceSource; 2] = [&base, &pack];
-        let fr = Language::load(&sources, "fr_fr");
-        assert_eq!(fr.get("a"), Some("Pomme"));
-        assert_eq!(fr.get("b"), Some("Banana"));
-    }
-
-    /// Every lang file of a downloaded pack, e.g. BACAP Language Pack:
-    /// `HORIZON_LANG_PACK_DIR=<pack>/assets/minecraft/lang cargo test -p horizon-client-core
-    /// lang::tests::every_lang_file_of_a_pack_reads -- --ignored --nocapture`.
-    #[test]
-    #[ignore = "needs a downloaded pack in HORIZON_LANG_PACK_DIR"]
-    fn every_lang_file_of_a_pack_reads() {
-        let Ok(dir) = std::env::var("HORIZON_LANG_PACK_DIR") else {
-            return;
-        };
-        let mut failed = Vec::new();
-        let mut paths: Vec<_> = std::fs::read_dir(dir)
-            .unwrap()
-            .map(|e| e.unwrap().path())
-            .collect();
-        paths.sort();
-        for path in paths {
-            let bytes = std::fs::read(&path).unwrap();
-            let strict = serde_json::from_slice::<HashMap<String, String>>(&bytes).is_ok();
-            let mut map = HashMap::new();
-            read_lang_file(&bytes, &mut map);
-            // An independent count: the distinct `"name":` that start a line.
-            let text = String::from_utf8_lossy(&bytes);
-            let names: std::collections::HashSet<&str> = text
-                .lines()
-                .filter_map(|line| {
-                    let rest = line.trim_start().strip_prefix('"')?;
-                    let mut escaped = false;
-                    let end = rest.char_indices().find_map(|(i, c)| {
-                        let close = c == '"' && !escaped;
-                        escaped = c == '\\' && !escaped;
-                        close.then_some(i)
-                    })?;
-                    rest[end + 1..]
-                        .trim_start()
-                        .starts_with(':')
-                        .then(|| &rest[..end])
-                })
-                .collect();
-            println!(
-                "{}: strict {strict}, {} keys, {} names",
-                path.display(),
-                map.len(),
-                names.len()
-            );
-            if map.is_empty() || map.len() != names.len() {
-                failed.push(path);
-            }
-        }
-        assert!(failed.is_empty(), "{failed:?}");
-    }
 }