Fix Windows path assertions in the launcher toolchain test (#3285)

Compare managed compiler and PATH entries as platform paths, including Windows executable suffixes. Fixes the Windows assertion that blocked the native-capable launcher release.

Validation: pr_ready passed (401 Python and 219 launcher tests), and the release dry run passed tests and packaged smoke checks on Linux, macOS and Windows.

Co-Authored-By: Codex <[email protected]>

.github/nightly-reviewers.txt

@@ -1,7 +0,0 @@
-# Trusted reviewers: they pick the pull requests the Nightly holds with `/nightly 2640 2642` in any issue or pull
-# request (docs/release-flow.md "Nightly channel", tools/ci/nightly_set.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 every reviewer's `/nightly` (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)

.github/trusted-reviewers.txt

@@ -0,0 +1,9 @@
+# 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).
+# 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)

.github/workflows/nightly-build.yml

@@ -25,6 +25,9 @@ run-name: nightly build${{ inputs.request && format(' (request {0})', inputs.req
 #   names the channel ("horizon release nightly"), so a nightly's signature can't pass for a release's.
 # - `publish` verifies the signature with main's horizon-release-sign, checks the smoke test, and only then moves
 #   the tag. Like sign, it never executes what build produced.
+# - The source ships with the build: `pick` writes horizon-source.tar.gz with `git archive` (git objects again, nothing
+#   run), `sign` signs it with the builds, and `publish` attaches it and tags the commit nightly-source/<date>-<short>
+#   for good (the dated release and the build branch go after 7 days; native mods pin the commit: docs/native-mods.md).
 #   gh workflow run "nightly build"                     # now (skips when the pick is the same commit as last night's)
 #   gh workflow run "nightly build" -f force=true       # build and publish even if unchanged
 #   gh workflow run "nightly build" -f dry_run=true     # build and sign with a throwaway key, publish nothing
@@ -76,6 +79,7 @@ jobs:
       date: ${{ steps.pick.outputs.date }}
       version: ${{ steps.pick.outputs.version }}
       nightly: ${{ steps.pick.outputs.nightly }}
+      source_tag: ${{ steps.pick.outputs.source_tag }}
       dry_run: ${{ steps.mode.outputs.dry_run }}
     steps:
       - uses: actions/checkout@v4
@@ -103,6 +107,18 @@ jobs:
           GH_TOKEN: ${{ github.token }}
         run: |
           { echo "### nightly/build-* branches"; python3 tools/ci/nightly.py prune-builds --days 7; } | tee -a "$GITHUB_STEP_SUMMARY"
+      - name: The source of the build (horizon-source.tar.gz)
+        if: steps.pick.outputs.build == 'true'
+        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@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@v4
         with:
           name: nightly-notes
@@ -144,7 +160,7 @@ jobs:
           EPHEMERAL: ${{ needs.pick.outputs.dry_run == 'true' && 'yes' || '' }}
         run: |
           bash tools/ci/sign_release.sh nightly dist/horizon-linux-x86_64.tar.gz dist/horizon-windows-x64.zip \
-            dist/horizon-macos-arm64.zip dist/horizon-server-linux-x86_64.tar.gz
+            dist/horizon-macos-arm64.zip dist/horizon-server-linux-x86_64.tar.gz dist/horizon-source.tar.gz
       - uses: actions/upload-artifact@v4
         with:
           name: signature
@@ -187,6 +203,7 @@ jobs:
           GH_TOKEN: ${{ github.token }}
           SHA: ${{ needs.pick.outputs.sha }}
           DATE: ${{ needs.pick.outputs.date }}
+          SOURCE_TAG: ${{ needs.pick.outputs.source_tag }}
         run: |
           set -euo pipefail
           python3 tools/ci/nightly.py rotate
@@ -198,7 +215,9 @@ jobs:
             "dist/horizon-windows-x64.zip#Nightly game files: Windows (horizon-windows-x64.zip)" \
             "dist/horizon-macos-arm64.zip#Nightly game files: macOS (horizon-macos-arm64.zip)" \
             "dist/horizon-server-linux-x86_64.tar.gz#Nightly dedicated server for Linux (horizon-server-linux-x86_64.tar.gz)" \
+            "dist/horizon-source.tar.gz#Source of this Nightly, commit ${SHA:0:7} (horizon-source.tar.gz; kept for good as the tag $SOURCE_TAG)" \
             dist/SHA256SUMS "${signature[@]}" dist/smoke-test.json
+          python3 tools/ci/nightly.py keep-source "$SHA" "$DATE"
           python3 tools/ci/nightly.py prune --days 7
       - name: Dry run, the nightly that would be published
         if: needs.pick.outputs.dry_run == 'true'

.github/workflows/nightly-command.yml

@@ -1,5 +1,5 @@
 name: nightly command
-# `/nightly …` comments: the trusted reviewers in .github/nightly-reviewers.txt (and Ludovic) pick the pull requests
+# `/nightly …` comments: the trusted reviewers in .github/trusted-reviewers.txt (and Ludovic) pick the pull requests
 # the Nightly holds (docs/release-flow.md "Nightly channel", tools/ci/nightly_set.py). This job only checks who asked,
 # saves the set on the nightly-state branch, starts `nightly build` and answers in the thread.
 #
@@ -33,7 +33,7 @@ jobs:
           persist-credentials: false
           sparse-checkout: |
             .github/CODEOWNERS
-            .github/nightly-reviewers.txt
+            .github/trusted-reviewers.txt
             tools/ci/nightly_set.py
           sparse-checkout-cone-mode: false
       - name: Run the command

.github/workflows/triage-command.yml

@@ -0,0 +1,48 @@
+name: triage command
+# `/close`, `/reopen`, `/label`, `/unlabel` comments: the trusted reviewers in .github/trusted-reviewers.txt (and
+# Ludovic) triage issues and pull requests without any repository role (docs/release-flow.md "Trusted reviewers",
+# tools/ci/triage_command.py).
+#
+# Why no pull request's code runs here, though the token can write:
+# - `issue_comment` always runs this file from main, whoever comments and wherever.
+# - It checks out main's script and list only, never a pull request; it reads threads through the API.
+# - The comment's text and author reach the script as env vars, never in a shell line. The token stays in the step.
+on:
+  issue_comment:
+    types: [created]
+permissions:
+  contents: read
+jobs:
+  command:
+    # Every other comment skips here, before a runner starts.
+    if: >-
+      github.event.comment.user.type != 'Bot' && (
+      startsWith(github.event.comment.body, '/close') ||
+      startsWith(github.event.comment.body, '/reopen') ||
+      startsWith(github.event.comment.body, '/label') ||
+      startsWith(github.event.comment.body, '/unlabel'))
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      contents: read
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: main
+          persist-credentials: false
+          sparse-checkout: |
+            .github/trusted-reviewers.txt
+            tools/ci/nightly_set.py
+            tools/ci/triage_command.py
+          sparse-checkout-cone-mode: false
+      - name: Run the command
+        env:
+          GH_TOKEN: ${{ github.token }}
+          BODY: ${{ github.event.comment.body }}
+          AUTHOR: ${{ github.event.comment.user.login }}
+          ISSUE: ${{ github.event.issue.number }}
+          REPO: ${{ github.repository }}
+          COMMENT_URL: ${{ github.event.comment.html_url }}
+        run: python3 tools/ci/triage_command.py command

AGENTS.md

@@ -39,6 +39,7 @@ Game workspace (root `Cargo.toml`); `launcher/` and `crates/horizon-telemetry-se
 | `horizon-items` | Blocks and items below gameplay: `blocks.rs` (block facts), `items.rs`, `item_data.rs` (components), `enchant.rs`, `cooldowns.rs`, `bundle.rs`, `item_nbt.rs`. Re-exported as `horizon_client::items`... |
 | `horizon-command` | Command parsing (Brigadier): the vanilla tree, argument types, selectors, suggestions, the tree's network form. Re-exported as `horizon_client::command` |
 | `horizon-client-core` | The client lib's bottom layer: `text.rs`, `lang.rs`, `snbt.rs`, `nbt_path.rs`, `component.rs`, `scoreboard.rs`, `bossbar.rs`, `gamerules.rs`, `block_entity_nbt.rs`, registry/particle/sound tables. Re-exported under the old paths (`horizon_client::text`...) |
+| `horizon-client-input` | Key bindings and key names, toggle keys, mouse options, controller settings and glyphs, the clipboard, window options (`keybinds.rs`, `gamepad.rs`, `mouse.rs`, `window.rs`...). Re-exported under the old paths |
 | `horizon-world` | Vanilla world data with no gameplay loop: NBT, regions, chunks, `datafix/`, `worldgen/`, `level/` (server-side block behaviour, ticks, redstone), entity physics, items, effects, food, damage |
 | `horizon-core` | Simulation primitives: Java `Random`s, `jmath` (HotSpot-exact `Math`), positions, noise, density, paletted storage, `version.rs` (the pinned version) |
 | `horizon-protocol` | Network protocol 777: codecs, framing, encryption, `packets/{handshake,status,login,configuration,play}.rs`, `entity_data.rs` |
@@ -58,7 +59,7 @@ Game workspace (root `Cargo.toml`); `launcher/` and `crates/horizon-telemetry-se
 
 Other top-level folders: `tools/` (harnesses and dev scripts), `tests/` (Python unit tests: `python3 -m
 unittest discover -s tests`), `mods/horizon/src/test/java/dev/horizonlab/parity/` (Java oracles),
-`docs/`, `.github/workflows/`. The website (playhorizon.dev) is the private ludovic111/horizon-site: its build
+`docs/`, `.github/workflows/`. The website (playhorizon.dev) is the private horizon-rust/horizon-site: its build
 reads `README.md`, `launcher/links.json`, `docs/api/`, `roadmap/roadmap.json` and `crates/horizon-theme/tokens.css` from main.
 
 ## Build and test fast
@@ -114,7 +115,7 @@ python3 tools/agent_control_e2e.py         # horizon-ctl / MCP end to end
 
 | Subsystem | Files |
 |---|---|
-| Game loop, tick, frame | `game.rs`: `fn run`, `impl ApplicationHandler for Game` (`window_event`, `about_to_wait`), `fn tick`, `fn tick_world`, `fn render`; L: `clock.rs`, `window.rs`, `spans.rs` |
+| 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/`, `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/`) |
@@ -130,7 +131,7 @@ python3 tools/agent_control_e2e.py         # horizon-ctl / MCP end to end
 | Integrated server | G: `integrated.rs` (the server thread), `levels.rs` (one level per dimension, `fn tick_server`), `server_travel.rs` |
 | Dedicated server | G: `dedicated.rs`, `dedicated/status.rs`; crates `horizon-server-files`, `horizon-server` |
 | Save and load | L: `save.rs` (level.dat, regions, playerdata), `entity_nbt.rs`, `options_file.rs`; `horizon-client-core/src/block_entity_nbt.rs`; G: `saving.rs`, `persist.rs` (entities); `crates/horizon-world/src/{region.rs,nbt.rs,datafix/}` |
-| Input | game.rs `fn window_event`, `fn key_pressed`, `fn play_mouse`; L: `keybinds.rs`, `keymapping.rs`, `key_names.rs`, `mouse.rs`, `input.rs`, `interaction_input.rs`, `gamepad.rs`, `osk.rs`, `clipboard.rs`; G: `pad.rs`, `pad_menu.rs` |
+| Input | game.rs `fn window_event`, `fn key_pressed`, `fn play_mouse`; crate `horizon-client-input` (`keybinds.rs`, `keymapping.rs`, `key_names.rs`, `mouse.rs`, `input.rs`, `interaction_input.rs`, `gamepad.rs`, `clipboard.rs`); L: `osk.rs`; G: `pad.rs`, `pad_menu.rs` |
 | Audio | L: `audio.rs` (mixer), `sound_engine.rs`, `sound_events.rs`, `music.rs`, `ambience.rs`; G: `music.rs`, `subtitle_hud.rs` |
 | Resource packs | L: `packs.rs` + `packs/`, `pack_screen.rs`, `atlas_sources.rs`, `sprites.rs`, `mipmap.rs`, `model_library.rs`, `font.rs`; `horizon-client-core/src/lang.rs`; crate `horizon-assets`; G: `packs.rs` |
 | Agent control | L: `control.rs` (socket), `bin/horizon-ctl/`; G: `control.rs`, `agent.rs`, `events.rs`, `ui_control.rs` ([docs/agent-control.md](docs/agent-control.md)) |

CONTRIBUTING.md

@@ -86,6 +86,9 @@ configuration and toolchain changes select the whole workspace; CI also keeps it
   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.
 
+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)).
+
 Every merge to main is released automatically ([release flow](docs/release-flow.md)), so main always stays playable.
 How agents, checks, releases and signed updates keep this safe: [security](docs/security.md).
 
@@ -98,5 +101,5 @@ new pushes, we add it again.
 
 ## Talk to us
 
-[Discord](https://discord.gg/HcTeMZxe5E) for questions and ideas, [issues](https://github.com/ludovic111/horizon/issues)
+[Discord](https://discord.gg/HcTeMZxe5E) for questions and ideas, [issues](https://github.com/horizon-rust/horizon/issues)
 for bugs. If you want to take something on, say so in its issue so nobody else starts the same work.

Cargo.lock

@@ -1370,7 +1370,6 @@ name = "horizon-client"
 version = "0.1.0"
 dependencies = [
  "ab_glyph",
- "arboard",
  "bytemuck",
  "chrono",
  "cpal",
@@ -1380,6 +1379,7 @@ dependencies = [
  "horizon-assets",
  "horizon-bench",
  "horizon-client-core",
+ "horizon-client-input",
  "horizon-command",
  "horizon-core",
  "horizon-dualsense",
@@ -1422,6 +1422,18 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "horizon-client-input"
+version = "0.1.0"
+dependencies = [
+ "arboard",
+ "horizon-client-core",
+ "horizon-dualsense",
+ "horizon-theme",
+ "png",
+ "winit",
+]
+
 [[package]]
 name = "horizon-command"
 version = "0.1.0"
@@ -3194,9 +3206,9 @@ dependencies = [
 
 [[package]]
 name = "rustls-webpki"
-version = "0.103.15"
+version = "0.103.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3c3cf1d8b1e7d4927e2d154c3fcb02979afb9939629c62cd9048d4f07b60ac2"
+checksum = "4443b1b6d39d7c663139942cc4558262562d2c84123bb6282ef177009ca8b281"
 dependencies = [
  "ring",
  "rustls-pki-types",
@@ -4374,14 +4386,14 @@ version = "0.26.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "521bc38abb08001b01866da9f51eb7c5d647a19260e00054a8c7fd5f9e57f7a9"
 dependencies = [
- "webpki-roots 1.0.9",
+ "webpki-roots 1.0.10",
 ]
 
 [[package]]
 name = "webpki-roots"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dcd9d09a39985f5344844e66b0c530a33843579125f23e21e9f0f220850f22a"
+checksum = "1c1c8e20c8a38fc7d65abfe74eb7280e4aa667e8eec8bc84996d2874810748d9"
 dependencies = [
  "rustls-pki-types",
 ]

Cargo.toml

@@ -8,6 +8,7 @@ members = [
     "crates/horizon-world",
     "crates/horizon-client",
     "crates/horizon-client-core",
+    "crates/horizon-client-input",
     "crates/horizon-command",
     "crates/horizon-items",
     "crates/horizon-server-files",

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 Ludovic
+Copyright (c) 2026 Ludovic Marie and the Horizon 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

README.md

@@ -3,7 +3,7 @@
 </p>
 
 <p align="center">
-  <a href="https://github.com/ludovic111/horizon/actions/workflows/ci.yml"><img src="https://github.com/ludovic111/horizon/actions/workflows/ci.yml/badge.svg?branch=main" alt="CI"></a>
+  <a href="https://github.com/horizon-rust/horizon/actions/workflows/ci.yml"><img src="https://github.com/horizon-rust/horizon/actions/workflows/ci.yml/badge.svg?branch=main" alt="CI"></a>
   <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%">
@@ -15,7 +15,7 @@
   <a href="https://playhorizon.dev"><b>Website</b></a> ·
   <a href="#download"><b>Download</b></a> ·
   <a href="https://playhorizon.dev/docs/"><b>Documentation</b></a> ·
-  <a href="https://github.com/ludovic111/horizon/releases"><b>Release notes</b></a> ·
+  <a href="https://github.com/horizon-rust/horizon/releases"><b>Release notes</b></a> ·
   <a href="ROADMAP.md"><b>Roadmap</b></a> ·
   <a href="#project-status"><b>Project status</b></a> ·
   <a href="#contributing"><b>Contributing</b></a>
@@ -29,7 +29,7 @@ Horizon is Minecraft: Java Edition 26.3 rewritten in Rust: a native game that re
 
 ## Download
 
-Horizon is installed through **the Horizon launcher**. Get it from [playhorizon.dev](https://playhorizon.dev) (the Download button picks your system) or from [the launcher releases](https://github.com/ludovic111/horizon/releases?q=launcher-v&expanded=true), for Linux x86-64, macOS on Apple Silicon or Windows x64. The launcher installs and updates the game, prepares its files from your own copy of Minecraft, and updates itself.
+Horizon is installed through **the Horizon launcher**. Get it from [playhorizon.dev](https://playhorizon.dev) (the Download button picks your system) or from [the launcher releases](https://github.com/horizon-rust/horizon/releases?q=launcher-v&expanded=true), for Linux x86-64, macOS on Apple Silicon or Windows x64. The launcher installs and updates the game, prepares its files from your own copy of Minecraft, and updates itself.
 
 **You need** a Microsoft account that owns Minecraft: Java Edition (the launcher signs in with it, as other launchers do; see [Microsoft account](docs/microsoft-account.md)); Minecraft: Java Edition 26.3, played once (the official launcher, Prism, MultiMC and other launchers all work); a Java 25 runtime, for the one-time preparation; and a GPU with Vulkan on Linux and Windows, or any Apple Silicon Mac. Step by step, with macOS's first-open prompt and the first launch: [Install and first launch](https://playhorizon.dev/docs/install).
 
@@ -99,7 +99,7 @@ Horizon contains no game files and never downloads them. It builds its resources
 2. **Server jar:** the 26.3 server jar, from the `downloads.server.url` in your launcher's `versions/26.3/26.3.json` (or [minecraft.net/download/server](https://www.minecraft.net/en-us/download/server) while 26.3 is the current release). Pass it with `--server-jar` or set `HORIZON_SERVER_JAR`. It is only needed the first time.
 
 ```sh
-git clone https://github.com/ludovic111/horizon.git
+git clone https://github.com/horizon-rust/horizon.git
 cd horizon
 cargo run --release -p horizon-prepare -- --prepare --server-jar ~/Downloads/server.jar   # needs JDK 25
 cargo run --release -p horizon-prepare -- sounds   # optional: sounds from your launcher install

ROADMAP.md

@@ -32,7 +32,7 @@ Making Horizon faster than vanilla on every computer, with smooth camera movemen
 
 <details><summary>Technical</summary>
 
-Frame pacing at render distance 32 ([#678](https://github.com/ludovic111/horizon/issues/678)): long frames come from work competing with the render thread. In review: world generation workers build free structure starts instead of queueing them ([#1760](https://github.com/ludovic111/horizon/issues/1760)), the worker pool leaves one core as vanilla does ([#1778](https://github.com/ludovic111/horizon/issues/1778)), and the terrain vertex arena is read as storage where flat draws run ([#1742](https://github.com/ludovic111/horizon/issues/1742)). Still open: far terrain at 48 to 64 chunks ([#718](https://github.com/ludovic111/horizon/issues/718)) and CPU-bound fields of block entities ([#717](https://github.com/ludovic111/horizon/issues/717)). Every change shows before and after numbers from `tools/perf_bench.py` against vanilla 26.3 ([docs/benchmark.md](docs/benchmark.md)).
+Frame pacing at render distance 32 ([#678](https://github.com/horizon-rust/horizon/issues/678)): long frames come from work competing with the render thread. In review: world generation workers build free structure starts instead of queueing them ([#1760](https://github.com/horizon-rust/horizon/issues/1760)), the worker pool leaves one core as vanilla does ([#1778](https://github.com/horizon-rust/horizon/issues/1778)), and the terrain vertex arena is read as storage where flat draws run ([#1742](https://github.com/horizon-rust/horizon/issues/1742)). Still open: far terrain at 48 to 64 chunks ([#718](https://github.com/horizon-rust/horizon/issues/718)) and CPU-bound fields of block entities ([#717](https://github.com/horizon-rust/horizon/issues/717)). Every change shows before and after numbers from `tools/perf_bench.py` against vanilla 26.3 ([docs/benchmark.md](docs/benchmark.md)).
 
 </details>
 
@@ -42,7 +42,7 @@ Speeding up the code that reads and writes the blocks of the world, which almost
 
 <details><summary>Technical</summary>
 
-`PalettedContainer` and `PackedStorage` find an entry's word by multiply and shift instead of an integer division ([#1790](https://github.com/ludovic111/horizon/issues/1790), [#1794](https://github.com/ludovic111/horizon/issues/1794)); meshing looks up baked models by index, not by name ([#1747](https://github.com/ludovic111/horizon/issues/1747)). Each change keeps the paletted storage harnesses identical and shows its microbenchmark ([docs/performance/paletted-container-access-results.md](docs/performance/paletted-container-access-results.md)).
+`PalettedContainer` and `PackedStorage` find an entry's word by multiply and shift instead of an integer division ([#1790](https://github.com/horizon-rust/horizon/issues/1790), [#1794](https://github.com/horizon-rust/horizon/issues/1794)); meshing looks up baked models by index, not by name ([#1747](https://github.com/horizon-rust/horizon/issues/1747)). Each change keeps the paletted storage harnesses identical and shows its microbenchmark ([docs/performance/paletted-container-access-results.md](docs/performance/paletted-container-access-results.md)).
 
 </details>
 
@@ -54,7 +54,7 @@ Making the world-generation mods of popular modpacks (new structures, YUNG's dun
 
 <details><summary>Technical</summary>
 
-`horizon-port-pack` carries a pack's data-driven content over; structure mods that need code get a native port: YUNG's worldgen as written ([#1746](https://github.com/ludovic111/horizon/issues/1746)), Lithostitched's limited and guaranteed elements with pool and processor modifiers ([#1777](https://github.com/ludovic111/horizon/issues/1777)), its processors as the game's own types ([#1765](https://github.com/ludovic111/horizon/issues/1765)). Proved by the structure blocks and layout harnesses ([#1753](https://github.com/ludovic111/horizon/issues/1753), [#1757](https://github.com/ludovic111/horizon/issues/1757)). Mods whose Java code does more than world generation don't run ([docs/modpacks.md](docs/modpacks.md)).
+`horizon-port-pack` carries a pack's data-driven content over; structure mods that need code get a native port: YUNG's worldgen as written ([#1746](https://github.com/horizon-rust/horizon/issues/1746)), Lithostitched's limited and guaranteed elements with pool and processor modifiers ([#1777](https://github.com/horizon-rust/horizon/issues/1777)), its processors as the game's own types ([#1765](https://github.com/horizon-rust/horizon/issues/1765)). Proved by the structure blocks and layout harnesses ([#1753](https://github.com/horizon-rust/horizon/issues/1753), [#1757](https://github.com/horizon-rust/horizon/issues/1757)). Mods whose Java code does more than world generation don't run ([docs/modpacks.md](docs/modpacks.md)).
 
 </details>
 
@@ -66,7 +66,7 @@ When you play on a server, other players, mobs, items and menus look and behave
 
 <details><summary>Technical</summary>
 
-Client-of-a-server fixes in `game/remote*.rs` and `horizon-protocol`: mobs' aggressive and item-use flags ([#1802](https://github.com/ludovic111/horizon/issues/1802), [#1798](https://github.com/ludovic111/horizon/issues/1798)), ghost items after a remote menu ([#1795](https://github.com/ludovic111/horizon/issues/1795)), skins ([#1652](https://github.com/ludovic111/horizon/issues/1652)), cookies and transfer packets for proxy networks ([#1650](https://github.com/ludovic111/horizon/issues/1650)), firework boosts ([#1671](https://github.com/ludovic111/horizon/issues/1671)), living-entity attributes and simulation distance ([#1731](https://github.com/ludovic111/horizon/issues/1731)), styled item names ([#1702](https://github.com/ludovic111/horizon/issues/1702)), primed TNT between updates ([#1710](https://github.com/ludovic111/horizon/issues/1710)).
+Client-of-a-server fixes in `game/remote*.rs` and `horizon-protocol`: mobs' aggressive and item-use flags ([#1802](https://github.com/horizon-rust/horizon/issues/1802), [#1798](https://github.com/horizon-rust/horizon/issues/1798)), ghost items after a remote menu ([#1795](https://github.com/horizon-rust/horizon/issues/1795)), skins ([#1652](https://github.com/horizon-rust/horizon/issues/1652)), cookies and transfer packets for proxy networks ([#1650](https://github.com/horizon-rust/horizon/issues/1650)), firework boosts ([#1671](https://github.com/horizon-rust/horizon/issues/1671)), living-entity attributes and simulation distance ([#1731](https://github.com/horizon-rust/horizon/issues/1731)), styled item names ([#1702](https://github.com/horizon-rust/horizon/issues/1702)), primed TNT between updates ([#1710](https://github.com/horizon-rust/horizon/issues/1710)).
 
 </details>
 
@@ -76,7 +76,7 @@ Servers that show dialogs, such as the register and login screens of AuthMe, wil
 
 <details><summary>Technical</summary>
 
-26.3's dialog packets and model ([#1720](https://github.com/ludovic111/horizon/issues/1720)), the dialog screen with its buttons and actions ([#1734](https://github.com/ludovic111/horizon/issues/1734)), then text and boolean inputs ([#1735](https://github.com/ludovic111/horizon/issues/1735)).
+26.3's dialog packets and model ([#1720](https://github.com/horizon-rust/horizon/issues/1720)), the dialog screen with its buttons and actions ([#1734](https://github.com/horizon-rust/horizon/issues/1734)), then text and boolean inputs ([#1735](https://github.com/horizon-rust/horizon/issues/1735)).
 
 </details>
 
@@ -86,7 +86,7 @@ A /pregen command that builds an area of the world ahead of time, so players don
 
 <details><summary>Technical</summary>
 
-Generates, lights and saves an area before anyone walks there ([#1805](https://github.com/ludovic111/horizon/issues/1805), a contributor's pull request, in review). Useful on servers, and it moves the generation cost away from the first visit; the generation speed-ups are under 'Steady frames at long render distances'.
+Generates, lights and saves an area before anyone walks there ([#1805](https://github.com/horizon-rust/horizon/issues/1805), a contributor's pull request, in review). Useful on servers, and it moves the generation cost away from the first visit; the generation speed-ups are under 'Steady frames at long render distances'.
 
 </details>
 
@@ -98,7 +98,7 @@ One place for mods, modpacks and resource packs made for Horizon: browse them on
 
 <details><summary>Technical</summary>
 
-Merged: the registry index (schema 1, `.hpack`, checks before install, [#1634](https://github.com/ludovic111/horizon/issues/1634)), `cargo horizon-mod check` ([#1642](https://github.com/ludovic111/horizon/issues/1642)) and the submission service (`crates/horizon-mod-registry`, [#1659](https://github.com/ludovic111/horizon/issues/1659)). In review: the website's /mods ([#1596](https://github.com/ludovic111/horizon/issues/1596)) and /mods/submit ([#1635](https://github.com/ludovic111/horizon/issues/1635)), and in the launcher the registry as a source ([#1636](https://github.com/ludovic111/horizon/issues/1636)), install, enable and takedowns ([#1637](https://github.com/ludovic111/horizon/issues/1637)), the Mods page ([#1638](https://github.com/ludovic111/horizon/issues/1638)) and modpacks as their own profiles ([#1640](https://github.com/ludovic111/horizon/issues/1640)).
+Merged: the registry index (schema 1, `.hpack`, checks before install, [#1634](https://github.com/horizon-rust/horizon/issues/1634)), `cargo horizon-mod check` ([#1642](https://github.com/horizon-rust/horizon/issues/1642)) and the submission service (`crates/horizon-mod-registry`, [#1659](https://github.com/horizon-rust/horizon/issues/1659)). In review: the website's /mods ([#1596](https://github.com/horizon-rust/horizon/issues/1596)) and /mods/submit ([#1635](https://github.com/horizon-rust/horizon/issues/1635)), and in the launcher the registry as a source ([#1636](https://github.com/horizon-rust/horizon/issues/1636)), install, enable and takedowns ([#1637](https://github.com/horizon-rust/horizon/issues/1637)), the Mods page ([#1638](https://github.com/horizon-rust/horizon/issues/1638)) and modpacks as their own profiles ([#1640](https://github.com/horizon-rust/horizon/issues/1640)).
 
 More: [docs/mods.md](docs/mods.md)
 
@@ -110,7 +110,7 @@ Mods that run on the server side of a world, so a dedicated server or a LAN worl
 
 <details><summary>Technical</summary>
 
-API 0.3, experimental first ([#1833](https://github.com/ludovic111/horizon/issues/1833), in review): the same sandboxed component runs on the server thread and the dedicated server, with world events (block broken or placed, entity spawned or killed, player joined or left), game rules and server commands with typed arguments. The world, item and entity interfaces come after (see 'Mods that read and change the world'). [docs/api/mods.md](docs/api/mods.md), [docs/mods.md](docs/mods.md).
+API 0.3, experimental first ([#1833](https://github.com/horizon-rust/horizon/issues/1833), in review): the same sandboxed component runs on the server thread and the dedicated server, with world events (block broken or placed, entity spawned or killed, player joined or left), game rules and server commands with typed arguments. The world, item and entity interfaces come after (see 'Mods that read and change the world'). [docs/api/mods.md](docs/api/mods.md), [docs/mods.md](docs/mods.md).
 
 </details>
 
@@ -120,7 +120,7 @@ Mods will be able to open their own screens and settings pages and react to keys
 
 <details><summary>Technical</summary>
 
-Capability `ui` is in review ([#1864](https://github.com/ludovic111/horizon/issues/1864)): mod-owned screens and a settings page under Options > Mods, built from vanilla's widgets. Still to design: `input` (an item's use, key binds, the crosshair target), `render` (a budgeted draw list on the native shader API) and `world` (changing blocks). Orbital Laser is the acceptance test: it needs all four today through its author's fork (see 'Orbital Laser on the normal game').
+Capability `ui` is in review ([#1864](https://github.com/horizon-rust/horizon/issues/1864)): mod-owned screens and a settings page under Options > Mods, built from vanilla's widgets. Still to design: `input` (an item's use, key binds, the crosshair target), `render` (a budgeted draw list on the native shader API) and `world` (changing blocks). Orbital Laser is the acceptance test: it needs all four today through its author's fork (see 'Orbital Laser on the normal game').
 
 More: [docs/mods.md](docs/mods.md)
 
@@ -132,7 +132,7 @@ Better tools for mod makers: a test runner that needs no game window, templates
 
 <details><summary>Technical</summary>
 
-`cargo horizon-mod test` runs a mod's test scripts against a fake game snapshot ([#1816](https://github.com/ludovic111/horizon/issues/1816)) and, for server mods, scripted server events ([#1837](https://github.com/ludovic111/horizon/issues/1837)); the content template and the guides are merged ([#1859](https://github.com/ludovic111/horizon/issues/1859), [#1810](https://github.com/ludovic111/horizon/issues/1810), [docs/api/stability.md](docs/api/stability.md)). Left: templates for hud, server and machine mods, typed wrappers in the SDK, a frozen 0.1 compatibility mod that every runtime must load, a CI check that fails when a stable reference entry is removed without a new major version, and the SDK on crates.io once the API is stable.
+`cargo horizon-mod test` runs a mod's test scripts against a fake game snapshot ([#1816](https://github.com/horizon-rust/horizon/issues/1816)) and, for server mods, scripted server events ([#1837](https://github.com/horizon-rust/horizon/issues/1837)); the content template and the guides are merged ([#1859](https://github.com/horizon-rust/horizon/issues/1859), [#1810](https://github.com/horizon-rust/horizon/issues/1810), [docs/api/stability.md](docs/api/stability.md)). Left: templates for hud, server and machine mods, typed wrappers in the SDK, a frozen 0.1 compatibility mod that every runtime must load, a CI check that fails when a stable reference entry is removed without a new major version, and the SDK on crates.io once the API is stable.
 
 More: [https://playhorizon.dev/docs/test-a-mod](https://playhorizon.dev/docs/test-a-mod)
 
@@ -146,7 +146,7 @@ Single player now runs a small server in the background, as vanilla does. We are
 
 <details><summary>Technical</summary>
 
-Since [#1514](https://github.com/ludovic111/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: a tool that changes a block ends the click ([#1797](https://github.com/ludovic111/horizon/issues/1797)), potions keep their potion over the connection ([#1796](https://github.com/ludovic111/horizon/issues/1796)), mobs' aggression and arm swings ([#1802](https://github.com/ludovic111/horizon/issues/1802)). [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: a tool that changes a block ends the click ([#1797](https://github.com/horizon-rust/horizon/issues/1797)), potions keep their potion over the connection ([#1796](https://github.com/horizon-rust/horizon/issues/1796)), mobs' aggression and arm swings ([#1802](https://github.com/horizon-rust/horizon/issues/1802)). [docs/server-levels.md](docs/server-levels.md).
 
 </details>
 
@@ -156,7 +156,7 @@ Item names, container titles and server messages follow the language you pick, a
 
 <details><summary>Technical</summary>
 
-Translatable components resolved through the selected language for items, containers and server text ([#1806](https://github.com/ludovic111/horizon/issues/1806)), on top of the bundled languages the prepared resources carry ([#1594](https://github.com/ludovic111/horizon/issues/1594)). Left: the client's own screens ([#1672](https://github.com/ludovic111/horizon/issues/1672)) and the main menu with zh_cn ([#1774](https://github.com/ludovic111/horizon/issues/1774)).
+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 ([#1774](https://github.com/horizon-rust/horizon/issues/1774)).
 
 </details>
 
@@ -166,9 +166,9 @@ After you throw an ender pearl, its slot should show the cooldown sweeping away,
 
 <details><summary>Technical</summary>
 
-Vanilla draws `ItemCooldowns`' percent as a white overlay over the slot (`GuiGraphicsExtractor.itemDecorations` and `itemCooldown`) in the hotbar and in inventories. Issue [#1763](https://github.com/ludovic111/horizon/issues/1763).
+Vanilla draws `ItemCooldowns`' percent as a white overlay over the slot (`GuiGraphicsExtractor.itemDecorations` and `itemCooldown`) in the hotbar and in inventories. Issue [#1763](https://github.com/horizon-rust/horizon/issues/1763).
 
-More: [#1933](https://github.com/ludovic111/horizon/issues/1933)
+More: [#1933](https://github.com/horizon-rust/horizon/issues/1933)
 
 </details>
 
@@ -178,9 +178,9 @@ The Hidden and Commands Only chat settings should hide chat, and team prefixes s
 
 <details><summary>Technical</summary>
 
-Vanilla checks `ChatVisiblity` before it delivers chat and system messages ([#1376](https://github.com/ludovic111/horizon/issues/1376)), and chat uses the team-formatted display name ([#1378](https://github.com/ludovic111/horizon/issues/1378)). Both issues have exact steps to reproduce.
+Vanilla checks `ChatVisiblity` before it delivers chat and system messages ([#1376](https://github.com/horizon-rust/horizon/issues/1376)), and chat uses the team-formatted display name ([#1378](https://github.com/horizon-rust/horizon/issues/1378)). Both issues have exact steps to reproduce.
 
-More: [#1932](https://github.com/ludovic111/horizon/issues/1932) · [#1841](https://github.com/ludovic111/horizon/issues/1841)
+More: [#1932](https://github.com/horizon-rust/horizon/issues/1932) · [#1841](https://github.com/horizon-rust/horizon/issues/1841)
 
 </details>
 
@@ -190,9 +190,9 @@ The mouse pointer should turn into a pointing hand over menu buttons, as in vani
 
 <details><summary>Technical</summary>
 
-26.3's `AbstractWidget` asks for a cursor from `CursorTypes` when it is hovered; winit's `CursorIcon::Pointer` gives the same shape. Issue [#1347](https://github.com/ludovic111/horizon/issues/1347).
+26.3's `AbstractWidget` asks for a cursor from `CursorTypes` when it is hovered; winit's `CursorIcon::Pointer` gives the same shape. Issue [#1347](https://github.com/horizon-rust/horizon/issues/1347).
 
-More: [#1897](https://github.com/ludovic111/horizon/issues/1897)
+More: [#1897](https://github.com/horizon-rust/horizon/issues/1897)
 
 </details>
 
@@ -202,9 +202,9 @@ Ctrl+Backspace should delete a whole word in the creative search, and every list
 
 <details><summary>Technical</summary>
 
-`EditBox` deletes by word with Ctrl ([#1764](https://github.com/ludovic111/horizon/issues/1764)); the Game Rules and Statistics lists' scroll bars can't be dragged ([#1782](https://github.com/ludovic111/horizon/issues/1782), after [#978](https://github.com/ludovic111/horizon/issues/978)).
+`EditBox` deletes by word with Ctrl ([#1764](https://github.com/horizon-rust/horizon/issues/1764)); the Game Rules and Statistics lists' scroll bars can't be dragged ([#1782](https://github.com/horizon-rust/horizon/issues/1782), after [#978](https://github.com/horizon-rust/horizon/issues/978)).
 
-More: [#1884](https://github.com/ludovic111/horizon/issues/1884) · [#1931](https://github.com/ludovic111/horizon/issues/1931)
+More: [#1884](https://github.com/horizon-rust/horizon/issues/1884) · [#1931](https://github.com/horizon-rust/horizon/issues/1931)
 
 </details>
 
@@ -214,9 +214,9 @@ Chickens should flap their wings while they fall, not stand still in the air.
 
 <details><summary>Technical</summary>
 
-Vanilla's `Chicken.aiStep` updates `flap` and `flapSpeed` when the chicken isn't on the ground, and the model's wings follow them. Issue [#1706](https://github.com/ludovic111/horizon/issues/1706).
+Vanilla's `Chicken.aiStep` updates `flap` and `flapSpeed` when the chicken isn't on the ground, and the model's wings follow them. Issue [#1706](https://github.com/horizon-rust/horizon/issues/1706).
 
-More: [#1892](https://github.com/ludovic111/horizon/issues/1892)
+More: [#1892](https://github.com/horizon-rust/horizon/issues/1892)
 
 </details>
 
@@ -228,9 +228,9 @@ Shader packs were removed and are being rebuilt from scratch. They come back, of
 
 <details><summary>Technical</summary>
 
-A clean-room rewrite in `horizon-shaderpack`, from the packs' public format documentation only: reading packs, the preprocessor and `.properties` files are merged ([#1584](https://github.com/ludovic111/horizon/issues/1584), [#1585](https://github.com/ludovic111/horizon/issues/1585), [#1586](https://github.com/ludovic111/horizon/issues/1586)); translating programs to WGSL through naga, buffers, uniforms and the terrain, entity, sky, weather and hand stages are in review ([#1698](https://github.com/ludovic111/horizon/issues/1698) to [#1801](https://github.com/ludovic111/horizon/issues/1801)).
+A clean-room rewrite in `horizon-shaderpack`, from the packs' public format documentation only: reading packs, the preprocessor and `.properties` files are merged ([#1584](https://github.com/horizon-rust/horizon/issues/1584), [#1585](https://github.com/horizon-rust/horizon/issues/1585), [#1586](https://github.com/horizon-rust/horizon/issues/1586)); translating programs to WGSL through naga, buffers, uniforms and the terrain, entity, sky, weather and hand stages are in review ([#1698](https://github.com/horizon-rust/horizon/issues/1698) to [#1801](https://github.com/horizon-rust/horizon/issues/1801)).
 
-More: [#1561](https://github.com/ludovic111/horizon/issues/1561) · [#1771](https://github.com/ludovic111/horizon/issues/1771) · [#1786](https://github.com/ludovic111/horizon/issues/1786)
+More: [#1561](https://github.com/horizon-rust/horizon/issues/1561) · [#1771](https://github.com/horizon-rust/horizon/issues/1771) · [#1786](https://github.com/horizon-rust/horizon/issues/1786)
 
 </details>
 
@@ -240,7 +240,7 @@ Horizon's own way to make shader packs, with tools to write and test them. Every
 
 <details><summary>Technical</summary>
 
-`horizon-shader-api` (API 0.1, experimental): WGSL stages with typed inputs inside the renderer's passes, options as WGSL override constants, and the `horizon-shader new|check|pack` tool with templates and the example pack Golden Hour. Merged: the check every pack passes ([#1820](https://github.com/ludovic111/horizon/issues/1820)) and the tool, templates and guide ([#1822](https://github.com/ludovic111/horizon/issues/1822)). In review: the post stage running in the game with hot reload ([#1861](https://github.com/ludovic111/horizon/issues/1861)), the sky stage ([#1863](https://github.com/ludovic111/horizon/issues/1863)) and registry checks that use the game's own check ([#1855](https://github.com/ludovic111/horizon/issues/1855)). Left: the material, lighting and shadow stages, a last-good fallback on reload, a GPU-time overlay per stage and budgets ([docs/shaders.md](docs/shaders.md), [docs/api/shaders.md](docs/api/shaders.md)). The Iris/OptiFine loader is a separate item, 'Shader packs, written again from scratch'.
+`horizon-shader-api` (API 0.1, experimental): WGSL stages with typed inputs inside the renderer's passes, options as WGSL override constants, and the `horizon-shader new|check|pack` tool with templates and the example pack Golden Hour. Merged: the check every pack passes ([#1820](https://github.com/horizon-rust/horizon/issues/1820)) and the tool, templates and guide ([#1822](https://github.com/horizon-rust/horizon/issues/1822)). In review: the post stage running in the game with hot reload ([#1861](https://github.com/horizon-rust/horizon/issues/1861)), the sky stage ([#1863](https://github.com/horizon-rust/horizon/issues/1863)) and registry checks that use the game's own check ([#1855](https://github.com/horizon-rust/horizon/issues/1855)). Left: the material, lighting and shadow stages, a last-good fallback on reload, a GPU-time overlay per stage and budgets ([docs/shaders.md](docs/shaders.md), [docs/api/shaders.md](docs/api/shaders.md)). The Iris/OptiFine loader is a separate item, 'Shader packs, written again from scratch'.
 
 </details>
 
@@ -252,7 +252,7 @@ Your Discord profile can show that you are playing Horizon, with a switch to tur
 
 <details><summary>Technical</summary>
 
-A Discord IPC client on its own thread ([#1787](https://github.com/ludovic111/horizon/issues/1787)) and the presence with its setting ([#1788](https://github.com/ludovic111/horizon/issues/1788)). Merged: it ships with the next release.
+A Discord IPC client on its own thread ([#1787](https://github.com/horizon-rust/horizon/issues/1787)) and the presence with its setting ([#1788](https://github.com/horizon-rust/horizon/issues/1788)). Merged: it ships with the next release.
 
 </details>
 
@@ -264,7 +264,7 @@ Cleaning up Horizon's code: removing what nothing uses and making it quicker to
 
 <details><summary>Technical</summary>
 
-A review of the whole tree: dead code and stubs removed ([#1432](https://github.com/ludovic111/horizon/issues/1432), [#1658](https://github.com/ludovic111/horizon/issues/1658)), one probe binary per crate ([#1453](https://github.com/ludovic111/horizon/issues/1453), [#1454](https://github.com/ludovic111/horizon/issues/1454)), shared harness helpers ([#1448](https://github.com/ludovic111/horizon/issues/1448)), clippy clean on the whole tree ([#1707](https://github.com/ludovic111/horizon/issues/1707)). [docs/architecture.md](docs/architecture.md) maps each feature to its files and harnesses.
+A review of the whole tree: dead code and stubs removed ([#1432](https://github.com/horizon-rust/horizon/issues/1432), [#1658](https://github.com/horizon-rust/horizon/issues/1658)), one probe binary per crate ([#1453](https://github.com/horizon-rust/horizon/issues/1453), [#1454](https://github.com/horizon-rust/horizon/issues/1454)), shared harness helpers ([#1448](https://github.com/horizon-rust/horizon/issues/1448)), clippy clean on the whole tree ([#1707](https://github.com/horizon-rust/horizon/issues/1707)). [docs/architecture.md](docs/architecture.md) maps each feature to its files and harnesses.
 
 </details>
 
@@ -278,7 +278,7 @@ New public numbers comparing Horizon with vanilla on many kinds of computers, me
 
 <details><summary>Technical</summary>
 
-Redo the comparison after the current performance work ([#1073](https://github.com/ludovic111/horizon/issues/1073)); reliability, coverage and presentation ([#1346](https://github.com/ludovic111/horizon/issues/1346)); a scene must count as loaded only once its first chunk arrives ([#1749](https://github.com/ludovic111/horizon/issues/1749)). Next: a performance history across releases (an automatic comparison of each release with the last, on a timeline), more report fields (server TPS and MSPT, power, battery drain, temperature, throttling) and more hardware (a MacBook on battery, low-end laptops, community reports). Players' reports come in through `--benchmark` and `horizon-launcher data benchmark` ([docs/benchmark.md](docs/benchmark.md)).
+Redo the comparison after the current performance work ([#1073](https://github.com/horizon-rust/horizon/issues/1073)); reliability, coverage and presentation ([#1346](https://github.com/horizon-rust/horizon/issues/1346)); a scene must count as loaded only once its first chunk arrives ([#1749](https://github.com/horizon-rust/horizon/issues/1749)). Next: a performance history across releases (an automatic comparison of each release with the last, on a timeline), more report fields (server TPS and MSPT, power, battery drain, temperature, throttling) and more hardware (a MacBook on battery, low-end laptops, community reports). Players' reports come in through `--benchmark` and `horizon-launcher data benchmark` ([docs/benchmark.md](docs/benchmark.md)).
 
 </details>
 
@@ -288,7 +288,7 @@ Creating a world and joining it should be quick even on a four-thread laptop, wh
 
 <details><summary>Technical</summary>
 
-Cut the per-column generation cost (noise sampling, surface rules, aquifers) and the lock convoy on structure starts, and leave one core free for the rest of the game as vanilla does ([#1760](https://github.com/ludovic111/horizon/issues/1760) and [#1778](https://github.com/ludovic111/horizon/issues/1778), in review, are listed under 'Steady frames at long render distances'). Still to profile on small CPUs: the first seconds of a fresh world deliver no chunk, and fluids remesh for about a minute after loading. Measured with `tools/perf_bench.py` ([docs/benchmark.md](docs/benchmark.md), [docs/profiling.md](docs/profiling.md)).
+Cut the per-column generation cost (noise sampling, surface rules, aquifers) and the lock convoy on structure starts, and leave one core free for the rest of the game as vanilla does ([#1760](https://github.com/horizon-rust/horizon/issues/1760) and [#1778](https://github.com/horizon-rust/horizon/issues/1778), in review, are listed under 'Steady frames at long render distances'). Still to profile on small CPUs: the first seconds of a fresh world deliver no chunk, and fluids remesh for about a minute after loading. Measured with `tools/perf_bench.py` ([docs/benchmark.md](docs/benchmark.md), [docs/profiling.md](docs/profiling.md)).
 
 </details>
 
@@ -320,7 +320,7 @@ Draw the game at a lower resolution and sharpen it to your screen's size, in the
 
 <details><summary>Technical</summary>
 
-A render-scale setting below the window size with an upscaler of our own that runs on every wgpu backend. Proof: frame time against native resolution on integrated GPUs, and screenshots for image quality. Issue [#1403](https://github.com/ludovic111/horizon/issues/1403).
+A render-scale setting below the window size with an upscaler of our own that runs on every wgpu backend. Proof: frame time against native resolution on integrated GPUs, and screenshots for image quality. Issue [#1403](https://github.com/horizon-rust/horizon/issues/1403).
 
 </details>
 
@@ -330,7 +330,7 @@ Several smaller speed-ups, each measured: idle block entities that sleep, cheape
 
 <details><summary>Technical</summary>
 
-Block entities and hoppers that skip work when idle (the hopper item scan is already skipped when no item is near); a particle frustum test first (also a parity gap), then particle quads built on the GPU; jigsaw shortcuts that skip blocked connectors and pool elements known not to fit, with layouts unchanged (trial chambers and ancient cities first); batched raw mouse input on Windows for 8000 Hz mice; a better atlas packer for huge resource packs (a 64x pack builds a 704 MiB atlas for 452 MiB of textures); sign-heavy scenes ([#1461](https://github.com/ludovic111/horizon/issues/1461)). Profile first, keep what pays, show before and after numbers.
+Block entities and hoppers that skip work when idle (the hopper item scan is already skipped when no item is near); a particle frustum test first (also a parity gap), then particle quads built on the GPU; jigsaw shortcuts that skip blocked connectors and pool elements known not to fit, with layouts unchanged (trial chambers and ancient cities first); batched raw mouse input on Windows for 8000 Hz mice; a better atlas packer for huge resource packs (a 64x pack builds a 704 MiB atlas for 452 MiB of textures); sign-heavy scenes ([#1461](https://github.com/horizon-rust/horizon/issues/1461)). Profile first, keep what pays, show before and after numbers.
 
 More: [docs/profiling.md](docs/profiling.md)
 
@@ -364,7 +364,7 @@ Making mods that add machines, magic and mobs work in Horizon, in steps, startin
 
 <details><summary>Technical</summary>
 
-333 of the 496 mods in a big pack (ATM10) contain code. Issue [#1854](https://github.com/ludovic111/horizon/issues/1854) ranks the API gaps (ticking block entities, networking, rendering, menus, inventories) that unlock them in tiers, with machines first as the recommended path and a furnace ported tick for tick as proof. The first API step is a draft ([#1189](https://github.com/ludovic111/horizon/issues/1189), see 'Machines and blocks with inventories'). The path isn't started yet ([docs/modpacks.md](docs/modpacks.md)).
+333 of the 496 mods in a big pack (ATM10) contain code. Issue [#1854](https://github.com/horizon-rust/horizon/issues/1854) ranks the API gaps (ticking block entities, networking, rendering, menus, inventories) that unlock them in tiers, with machines first as the recommended path and a furnace ported tick for tick as proof. The first API step is a draft ([#1189](https://github.com/horizon-rust/horizon/issues/1189), see 'Machines and blocks with inventories'). The path isn't started yet ([docs/modpacks.md](docs/modpacks.md)).
 
 </details>
 
@@ -386,7 +386,7 @@ Set up Horizon, a server first, without Java on your computer: published tables
 
 <details><summary>Technical</summary>
 
-Today `horizon-prepare` runs Mojang's exporters with Java. Issue [#1750](https://github.com/ludovic111/horizon/issues/1750) proposes publishing the computed version tables once from CI and assembling the rest locally from the player's own jar and assets, provided the tables hold no Mojang content; a contributor offered a pull request, and it would help phones too. A server-only prepare from `server.jar` alone is the first step ([docs/server.md](docs/server.md)).
+Today `horizon-prepare` runs Mojang's exporters with Java. Issue [#1750](https://github.com/horizon-rust/horizon/issues/1750) proposes publishing the computed version tables once from CI and assembling the rest locally from the player's own jar and assets, provided the tables hold no Mojang content; a contributor offered a pull request, and it would help phones too. A server-only prepare from `server.jar` alone is the first step ([docs/server.md](docs/server.md)).
 
 </details>
 
@@ -406,7 +406,7 @@ Smoother hosting: a real Windows service, a backup before every update, backups
 
 <details><summary>Technical</summary>
 
-A Windows service wrapper instead of the logon scheduled task; `backups.before_update`; hot reload of config for view distance and the message of the day (needs engine support); backups that keep world and player state ([#1808](https://github.com/ludovic111/horizon/issues/1808), a contributor's draft, in review). [docs/hosting.md](docs/hosting.md), docs/server.md.
+A Windows service wrapper instead of the logon scheduled task; `backups.before_update`; hot reload of config for view distance and the message of the day (needs engine support); backups that keep world and player state ([#1808](https://github.com/horizon-rust/horizon/issues/1808), a contributor's draft, in review). [docs/hosting.md](docs/hosting.md), docs/server.md.
 
 </details>
 
@@ -464,7 +464,7 @@ Mods that add machines: blocks that tick, hold items and have their own menus. T
 
 <details><summary>Technical</summary>
 
-Block entities and menus: ticking machines with slots, server menu logic and the menu protocol to clients, energy, item and fluid transfer, data attachments, accessory slots and custom recipe types, with a typed client and server channel and typed config beside them. A draft ([#1189](https://github.com/ludovic111/horizon/issues/1189)) proves a furnace ported tick for tick and holds the ATM10 code-mods plan; the design is redone through the API policy before it merges ([docs/modpacks.md](docs/modpacks.md), docs/api/stability.md).
+Block entities and menus: ticking machines with slots, server menu logic and the menu protocol to clients, energy, item and fluid transfer, data attachments, accessory slots and custom recipe types, with a typed client and server channel and typed config beside them. A draft ([#1189](https://github.com/horizon-rust/horizon/issues/1189)) proves a furnace ported tick for tick and holds the ATM10 code-mods plan; the design is redone through the API policy before it merges ([docs/modpacks.md](docs/modpacks.md), docs/api/stability.md).
 
 </details>
 
@@ -486,7 +486,7 @@ Pistons and slime blocks will push players, mobs and items as in vanilla. Today
 
 <details><summary>Technical</summary>
 
-Port `PistonMovingBlockEntity.moveCollidedEntities` and `moveStuckEntities` (honey), the slime bounce and `Entity.limitPistonMovement` for `MoverType.PISTON`, in single player and for a server's players. Issues [#1496](https://github.com/ludovic111/horizon/issues/1496), [#1609](https://github.com/ludovic111/horizon/issues/1609), [#1608](https://github.com/ludovic111/horizon/issues/1608), [#1704](https://github.com/ludovic111/horizon/issues/1704), [#1758](https://github.com/ludovic111/horizon/issues/1758).
+Port `PistonMovingBlockEntity.moveCollidedEntities` and `moveStuckEntities` (honey), the slime bounce and `Entity.limitPistonMovement` for `MoverType.PISTON`, in single player and for a server's players. Issues [#1496](https://github.com/horizon-rust/horizon/issues/1496), [#1609](https://github.com/horizon-rust/horizon/issues/1609), [#1608](https://github.com/horizon-rust/horizon/issues/1608), [#1704](https://github.com/horizon-rust/horizon/issues/1704), [#1758](https://github.com/horizon-rust/horizon/issues/1758).
 
 </details>
 
@@ -506,7 +506,7 @@ Villages and fights behaving as in vanilla: iron golems defending villages, vill
 
 <details><summary>Technical</summary>
 
-Villages: iron golem village goals, villager memories across saves, villager age, job-site claiming on dedicated servers, flower offers ([#1639](https://github.com/ludovic111/horizon/issues/1639) is one report). Combat: the mobs' `attack_knockback` attribute, mace smash logic, the hit knockback source on the host, the fire burnout biome tag. Each is checked against vanilla by a harness ([docs/rust-parity.md](docs/rust-parity.md)).
+Villages: iron golem village goals, villager memories across saves, villager age, job-site claiming on dedicated servers, flower offers ([#1639](https://github.com/horizon-rust/horizon/issues/1639) is one report). Combat: the mobs' `attack_knockback` attribute, mace smash logic, the hit knockback source on the host, the fire burnout biome tag. Each is checked against vanilla by a harness ([docs/rust-parity.md](docs/rust-parity.md)).
 
 </details>
 
@@ -516,7 +516,7 @@ Pick the speakers or headphones Horizon plays through, in Music & Sounds.
 
 <details><summary>Technical</summary>
 
-An output device list in Music & Sounds, falling back to the system default. [#1035](https://github.com/ludovic111/horizon/issues/1035) started it: a player on an older Windows computer had no sound at all, and a device choice is how such cases are found and fixed.
+An output device list in Music & Sounds, falling back to the system default. [#1035](https://github.com/horizon-rust/horizon/issues/1035) started it: a player on an older Windows computer had no sound at all, and a device choice is how such cases are found and fixed.
 
 </details>
 
@@ -544,7 +544,7 @@ Coming soon: sign in with your Microsoft account to play on online-mode servers.
 
 Device-code sign-in in the launcher and online-mode login in the client ([docs/microsoft-account.md](docs/microsoft-account.md)). It is turned on by setting the app's client id once Minecraft API access is approved; until then the launcher shows "Coming soon".
 
-More: [#1270](https://github.com/ludovic111/horizon/issues/1270)
+More: [#1270](https://github.com/horizon-rust/horizon/issues/1270)
 
 </details>
 
@@ -566,7 +566,7 @@ Builds of the game and the launcher for Macs with an Intel processor.
 
 <details><summary>Technical</summary>
 
-x86_64 game and launcher builds, picked per processor ([#1171](https://github.com/ludovic111/horizon/issues/1171)). Before it ships it needs a run on a real Intel Mac: Rosetta on Apple Silicon only proves the CPU code. Requests: [#1161](https://github.com/ludovic111/horizon/issues/1161), [#1792](https://github.com/ludovic111/horizon/issues/1792).
+x86_64 game and launcher builds, picked per processor ([#1171](https://github.com/horizon-rust/horizon/issues/1171)). Before it ships it needs a run on a real Intel Mac: Rosetta on Apple Silicon only proves the CPU code. Requests: [#1161](https://github.com/horizon-rust/horizon/issues/1161), [#1792](https://github.com/horizon-rust/horizon/issues/1792).
 
 </details>
 
@@ -576,7 +576,7 @@ Fixes for Linux desktops that use Wayland and Hyprland: fullscreen, the clipboar
 
 <details><summary>Technical</summary>
 
-Open: the GUI Scale is clamped to 2 after a restart under Hyprland, while XWayland keeps it ([#1866](https://github.com/ludovic111/horizon/issues/1866)). Earlier reports covered fullscreen dropping on menu clicks, the clipboard and a white overlay ([#1007](https://github.com/ludovic111/horizon/issues/1007), closed). Checked on a real Wayland session.
+Open: the GUI Scale is clamped to 2 after a restart under Hyprland, while XWayland keeps it ([#1866](https://github.com/horizon-rust/horizon/issues/1866)). Earlier reports covered fullscreen dropping on menu clicks, the clipboard and a white overlay ([#1007](https://github.com/horizon-rust/horizon/issues/1007), closed). Checked on a real Wayland session.
 
 </details>
 
@@ -626,7 +626,7 @@ Safer releases: changes to the release machinery need the owner's review, and AI
 
 <details><summary>Technical</summary>
 
-`.github/CODEOWNERS` lists the workflows, the release and signing tools, the update-checking code and the installers ([#1015](https://github.com/ludovic111/horizon/issues/1015)); the branch protection that makes it count waits for the `horizon-agent` GitHub App, which reads and writes code, pull requests and issues but can't change settings, workflows, secrets or members, and whose tokens last an hour. It needs the owner to create the App and switch the protection on ([docs/security.md](docs/security.md)).
+`.github/CODEOWNERS` lists the workflows, the release and signing tools, the update-checking code and the installers ([#1015](https://github.com/horizon-rust/horizon/issues/1015)); the branch protection that makes it count waits for the `horizon-agent` GitHub App, which reads and writes code, pull requests and issues but can't change settings, workflows, secrets or members, and whose tokens last an hour. It needs the owner to create the App and switch the protection on ([docs/security.md](docs/security.md)).
 
 </details>
 
@@ -636,7 +636,7 @@ Every download Horizon makes is checked against the project's signature, includi
 
 <details><summary>Technical</summary>
 
-Releases carry signed checksums, and the launcher and `horizon-server update` refuse anything unsigned ([#1011](https://github.com/ludovic111/horizon/issues/1011), [#1014](https://github.com/ludovic111/horizon/issues/1014)). Left: the first install through `install.sh` and `install.ps1` still trusts only the checksum GitHub publishes, because verifying Ed25519 signatures needs OpenSSL 3, which macOS doesn't ship ([docs/security.md](docs/security.md)).
+Releases carry signed checksums, and the launcher and `horizon-server update` refuse anything unsigned ([#1011](https://github.com/horizon-rust/horizon/issues/1011), [#1014](https://github.com/horizon-rust/horizon/issues/1014)). Left: the first install through `install.sh` and `install.ps1` still trusts only the checksum GitHub publishes, because verifying Ed25519 signatures needs OpenSSL 3, which macOS doesn't ship ([docs/security.md](docs/security.md)).
 
 </details>
 
@@ -650,7 +650,7 @@ Far terrain drawn from the world you really built and explored, caves and builds
 
 <details><summary>Technical</summary>
 
-Keep a 3D mip store on disk built from real chunks, drawn by the GPU beside the seed preview for areas nobody has visited. Written from scratch and measured before it is kept. Builds on Far Detail and the far-terrain levels of detail already shipped; the open work on them is [#718](https://github.com/ludovic111/horizon/issues/718).
+Keep a 3D mip store on disk built from real chunks, drawn by the GPU beside the seed preview for areas nobody has visited. Written from scratch and measured before it is kept. Builds on Far Detail and the far-terrain levels of detail already shipped; the open work on them is [#718](https://github.com/horizon-rust/horizon/issues/718).
 
 </details>
 
@@ -692,7 +692,7 @@ Run Java mods that nobody has rewritten for Horizon yet, through a bridge or a c
 
 <details><summary>Technical</summary>
 
-Earlier research ([#527](https://github.com/ludovic111/horizon/issues/527), closed) found that Java mods can't simply run, because they call Minecraft's own classes. Options to look at again: a jar-to-WebAssembly backend, or a bridge for simple Fabric mods. Whatever is chosen has to run inside the same sandbox and capability checks as native mods.
+Earlier research ([#527](https://github.com/horizon-rust/horizon/issues/527), closed) found that Java mods can't simply run, because they call Minecraft's own classes. Options to look at again: a jar-to-WebAssembly backend, or a bridge for simple Fabric mods. Whatever is chosen has to run inside the same sandbox and capability checks as native mods.
 
 </details>
 
@@ -704,7 +704,7 @@ Sign in with other account providers, such as Ely.by or any Yggdrasil-compatible
 
 <details><summary>Technical</summary>
 
-Issue [#1270](https://github.com/ludovic111/horizon/issues/1270) asks for Ely.by and Yggdrasil-compatible servers with an account selector in the launcher. It builds on the Microsoft sign-in ([docs/microsoft-account.md](docs/microsoft-account.md)).
+Issue [#1270](https://github.com/horizon-rust/horizon/issues/1270) asks for Ely.by and Yggdrasil-compatible servers with an account selector in the launcher. It builds on the Microsoft sign-in ([docs/microsoft-account.md](docs/microsoft-account.md)).
 
 </details>
 
@@ -748,7 +748,7 @@ Contraptions and physics like the Create and Aeronautics mods, as a mod for Hori
 
 <details><summary>Technical</summary>
 
-Issue [#805](https://github.com/ludovic111/horizon/issues/805) (porting QOL mods) closed with this answer: it would come as a native Horizon mod on the mod API. It needs server mods, entities and rendering first.
+Issue [#805](https://github.com/horizon-rust/horizon/issues/805) (porting QOL mods) closed with this answer: it would come as a native Horizon mod on the mod API. It needs server mods, entities and rendering first.
 
 </details>
 
@@ -790,7 +790,7 @@ Vanilla's complete F3 screen: debug options, a profiler chart, ten-second captur
 
 <details><summary>Technical</summary>
 
-Today F3 shows position, chunk, light, biome and FPS ([docs/native-client.md](docs/native-client.md)). Vanilla also has F3+F6 debug options with profiles, F3+1 the profiler pie, F3+L a ten-second capture and F3+S the atlas dump ([#562](https://github.com/ludovic111/horizon/issues/562) asked for the F3 editor).
+Today F3 shows position, chunk, light, biome and FPS ([docs/native-client.md](docs/native-client.md)). Vanilla also has F3+F6 debug options with profiles, F3+1 the profiler pie, F3+L a ten-second capture and F3+S the atlas dump ([#562](https://github.com/horizon-rust/horizon/issues/562) asked for the F3 editor).
 
 </details>
 
@@ -814,7 +814,7 @@ An optional ray-tracing mode for graphics cards that support it (RTX and recent
 
 <details><summary>Technical</summary>
 
-A spike with ray-traced sun shadows, off by default, is a draft ([#1180](https://github.com/ludovic111/horizon/issues/1180)). Reflections, global illumination, Apple M3 and newer if it is cheap, and a performance report per card come after.
+A spike with ray-traced sun shadows, off by default, is a draft ([#1180](https://github.com/horizon-rust/horizon/issues/1180)). Reflections, global illumination, Apple M3 and newer if it is cheap, and a performance report per card come after.
 
 </details>
 
@@ -824,7 +824,7 @@ Output for HDR monitors: brighter highlights and richer colour where your screen
 
 <details><summary>Technical</summary>
 
-Issue [#1441](https://github.com/ludovic111/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.
+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>
 
@@ -858,7 +858,7 @@ Game and launcher builds for 64-bit ARM Linux computers.
 
 <details><summary>Technical</summary>
 
-Issue [#1709](https://github.com/ludovic111/horizon/issues/1709): aarch64 builds of the game and the launcher in the release workflow, tested on a real ARM machine with its Vulkan driver. The server build already drops audio and controllers (`--no-default-features`).
+Issue [#1709](https://github.com/horizon-rust/horizon/issues/1709): aarch64 builds of the game and the launcher in the release workflow, tested on a real ARM machine with its Vulkan driver. The server build already drops audio and controllers (`--no-default-features`).
 
 </details>
 
@@ -868,7 +868,7 @@ Versions of Horizon for Android, iOS and web browsers. Nothing official yet; con
 
 <details><summary>Technical</summary>
 
-No official build. Android was first closed as not planned, with touch controls, a mobile interface, packaging and loading the player's own assets all missing; the roadmap now includes it, iOS and a WebAssembly build for the browser as long-term goals. First pieces from contributors: `horizon-dualsense` compiling on iOS ([#1813](https://github.com/ludovic111/horizon/issues/1813)) and helper-thread limits on Android ([#1751](https://github.com/ludovic111/horizon/issues/1751)). Preparing without Java ([#1750](https://github.com/ludovic111/horizon/issues/1750)) matters here too. Horizon ships none of Mojang's files on any platform.
+No official build. Android was first closed as not planned, with touch controls, a mobile interface, packaging and loading the player's own assets all missing; the roadmap now includes it, iOS and a WebAssembly build for the browser as long-term goals. First pieces from contributors: `horizon-dualsense` compiling on iOS ([#1813](https://github.com/horizon-rust/horizon/issues/1813)) and helper-thread limits on Android ([#1751](https://github.com/horizon-rust/horizon/issues/1751)). Preparing without Java ([#1750](https://github.com/horizon-rust/horizon/issues/1750)) matters here too. Horizon ships none of Mojang's files on any platform.
 
 </details>
 
@@ -912,7 +912,7 @@ An optional AI teammate you can talk to by voice. It plays beside you, helps or
 
 <details><summary>Technical</summary>
 
-Draft pull requests: the companion ([#1068](https://github.com/ludovic111/horizon/issues/1068)), its safety modes and their evaluation ([#1069](https://github.com/ludovic111/horizon/issues/1069)) and a route that finishes the game ([#1070](https://github.com/ludovic111/horizon/issues/1070)). In the drafts: a companion that follows, fights, mines, crafts, sleeps and respawns; chat and push-to-talk voice, with speech recognition and a choice of voices; presets (very strong, helper, beat the game); a guard model with Clean, Kid and Salty modes; perception levels from Fair to All-knowing; hardware detection with a simple mode and an Advanced tab; local models first, cloud keys optional. The No AI switch is already in the game. Left: the speedrun route doesn't finish the game reliably yet, voices for more languages, and the safety evaluation, which must pass before it ships.
+Draft pull requests: the companion ([#1068](https://github.com/horizon-rust/horizon/issues/1068)), its safety modes and their evaluation ([#1069](https://github.com/horizon-rust/horizon/issues/1069)) and a route that finishes the game ([#1070](https://github.com/horizon-rust/horizon/issues/1070)). In the drafts: a companion that follows, fights, mines, crafts, sleeps and respawns; chat and push-to-talk voice, with speech recognition and a choice of voices; presets (very strong, helper, beat the game); a guard model with Clean, Kid and Salty modes; perception levels from Fair to All-knowing; hardware detection with a simple mode and an Advanced tab; local models first, cloud keys optional. The No AI switch is already in the game. Left: the speedrun route doesn't finish the game reliably yet, voices for more languages, and the safety evaluation, which must pass before it ships.
 
 </details>
 
@@ -938,7 +938,7 @@ Run Horizon's built-in benchmark and share the report: every new computer makes
 
 <details><summary>Technical</summary>
 
-`horizon-launcher play --arg=--benchmark --arg=standard` writes a JSON report; `horizon-launcher data benchmark <report>` shows what would be sent and uploads it (playhorizon.dev/docs/performance). Results from three installs with the same hardware appear on the Benchmarks page. Example: [#1711](https://github.com/ludovic111/horizon/issues/1711).
+`horizon-launcher play --arg=--benchmark --arg=standard` writes a JSON report; `horizon-launcher data benchmark <report>` shows what would be sent and uploads it (playhorizon.dev/docs/performance). Results from three installs with the same hardware appear on the Benchmarks page. Example: [#1711](https://github.com/horizon-rust/horizon/issues/1711).
 
 More: [https://playhorizon.dev/docs/performance](https://playhorizon.dev/docs/performance)
 
@@ -952,7 +952,7 @@ 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/ludovic111/horizon/issues/1438); possibly related: [#526](https://github.com/ludovic111/horizon/issues/526).
+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>
 
@@ -962,19 +962,19 @@ 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/ludovic111/horizon/issues/1437), [#1660](https://github.com/ludovic111/horizon/issues/1660).
+`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
 
-- **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/ludovic111/horizon/issues/1917) · [#1920](https://github.com/ludovic111/horizon/issues/1920) · [#1936](https://github.com/ludovic111/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/ludovic111/horizon/issues/1562) · [#1569](https://github.com/ludovic111/horizon/issues/1569) · [#1570](https://github.com/ludovic111/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/ludovic111/horizon/issues/1514) · [docs/server-levels.md](docs/server-levels.md)
-- **GPU occlusion culling on Macs** (v0.2.17): On Macs the GPU now skips terrain hidden behind hills and caves: 8 to 48% more frames per second at 32 chunks on an M4 Pro. [#1434](https://github.com/ludovic111/horizon/issues/1434)
-- **Animated textures on the GPU** (v0.2.5): Water, lava and other animated blocks are now animated by the graphics card: 1.7 to 2.4 times better 1% lows on Intel graphics. [#1239](https://github.com/ludovic111/horizon/issues/1239)
-- **Far Detail for integrated graphics** (v0.2.5): An optional Reduced setting for far terrain, suggested on integrated graphics, that saves 2 to 4 ms of GPU time per frame. [#1199](https://github.com/ludovic111/horizon/issues/1199) · [#1029](https://github.com/ludovic111/horizon/issues/1029)
-- **The launcher's mod browser** (launcher@0.2.0): Search Modrinth for mods, modpacks and resource packs from the launcher; it says before installing what works in Horizon. [#1154](https://github.com/ludovic111/horizon/issues/1154) · [#1242](https://github.com/ludovic111/horizon/issues/1242) · [#1243](https://github.com/ludovic111/horizon/issues/1243) · [#1246](https://github.com/ludovic111/horizon/issues/1246) · [docs/mod-browser.md](docs/mod-browser.md)
-- **A blocky, Minecraft-like launcher** (launcher@0.2.0): The launcher got a new blocky look in Horizon's purple, in dark and light. [#1269](https://github.com/ludovic111/horizon/issues/1269) · [docs/design-system.md](docs/design-system.md)
-- **Dynamic lights** (v2026.10.22): An optional extra: torches you hold, drop or set on fire light up what is around them. [#1162](https://github.com/ludovic111/horizon/issues/1162)
-- **Host a server from the launcher** (launcher-v0.15.0): The launcher's Servers page creates, starts, backs up and updates a Horizon server with buttons, and invites friends. [#1026](https://github.com/ludovic111/horizon/issues/1026) · [docs/hosting.md](docs/hosting.md)
+- **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)
+- **GPU occlusion culling on Macs** (v0.2.17): On Macs the GPU now skips terrain hidden behind hills and caves: 8 to 48% more frames per second at 32 chunks on an M4 Pro. [#1434](https://github.com/horizon-rust/horizon/issues/1434)
+- **Animated textures on the GPU** (v0.2.5): Water, lava and other animated blocks are now animated by the graphics card: 1.7 to 2.4 times better 1% lows on Intel graphics. [#1239](https://github.com/horizon-rust/horizon/issues/1239)
+- **Far Detail for integrated graphics** (v0.2.5): An optional Reduced setting for far terrain, suggested on integrated graphics, that saves 2 to 4 ms of GPU time per frame. [#1199](https://github.com/horizon-rust/horizon/issues/1199) · [#1029](https://github.com/horizon-rust/horizon/issues/1029)
+- **The launcher's mod browser** (launcher@0.2.0): Search Modrinth for mods, modpacks and resource packs from the launcher; it says before installing what works in Horizon. [#1154](https://github.com/horizon-rust/horizon/issues/1154) · [#1242](https://github.com/horizon-rust/horizon/issues/1242) · [#1243](https://github.com/horizon-rust/horizon/issues/1243) · [#1246](https://github.com/horizon-rust/horizon/issues/1246) · [docs/mod-browser.md](docs/mod-browser.md)
+- **A blocky, Minecraft-like launcher** (launcher@0.2.0): The launcher got a new blocky look in Horizon's purple, in dark and light. [#1269](https://github.com/horizon-rust/horizon/issues/1269) · [docs/design-system.md](docs/design-system.md)
+- **Dynamic lights** (v2026.10.22): An optional extra: torches you hold, drop or set on fire light up what is around them. [#1162](https://github.com/horizon-rust/horizon/issues/1162)
+- **Host a server from the launcher** (launcher-v0.15.0): The launcher's Servers page creates, starts, backs up and updates a Horizon server with buttons, and invites friends. [#1026](https://github.com/horizon-rust/horizon/issues/1026) · [docs/hosting.md](docs/hosting.md)

benchmarks/server-equal-mixed-2026-10-18/README.md

@@ -119,7 +119,7 @@ machines during the runs.
 
 ## Reproduce
 
-    curl -fsSL https://raw.githubusercontent.com/ludovic111/horizon/main/packaging/server/install.sh | sh
+    curl -fsSL https://raw.githubusercontent.com/horizon-rust/horizon/main/packaging/server/install.sh | sh
     horizon-prepare --prepare --server-jar /path/to/server.jar      # your own copy
     cargo build --release -p horizon-bots                            # on the machine that runs the bots
     # in a checkout whose .local/minecraft holds the pinned vanilla jars (tools/lab.py prepare):

benchmarks/server-four-way-2026-10-19/README.md

@@ -148,7 +148,7 @@ early, wrote no report. Its lines come from its output.
 
 ## Reproduce
 
-    curl -fsSL https://raw.githubusercontent.com/ludovic111/horizon/main/packaging/server/install.sh | sh
+    curl -fsSL https://raw.githubusercontent.com/horizon-rust/horizon/main/packaging/server/install.sh | sh
     horizon-prepare --prepare --server-jar /path/to/server.jar      # your own copy
     cargo build --release -p horizon-bots                            # on the machine that runs the bots
     # in a checkout whose .local/minecraft holds the pinned vanilla jars (tools/lab.py prepare):

benchmarks/server-mixed-2026-10-18/README.md

@@ -103,7 +103,7 @@ the Nix store, so the run set `LD_LIBRARY_PATH` to them (see #898).
 
 ## Reproduce
 
-    curl -fsSL https://raw.githubusercontent.com/ludovic111/horizon/main/packaging/server/install.sh | sh
+    curl -fsSL https://raw.githubusercontent.com/horizon-rust/horizon/main/packaging/server/install.sh | sh
     horizon-prepare --prepare --server-jar /path/to/server.jar      # your own copy
     cargo build --release -p horizon-bots                            # on the machine that runs the bots
     # in a checkout whose .local/minecraft holds the pinned vanilla jars (tools/lab.py prepare):

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

@@ -97,6 +97,9 @@ impl Report {
         for r in &f.requires {
             out += &format!("  needs {} {} ({})\n", r.id, r.version, &r.sha256[..12]);
         }
+        if self.kind == Kind::NativeMod {
+            out += "  native source: unsandboxed; not executed by the registry check. Compile and test against the exact pinned Horizon and Mixins revisions before review.\n";
+        }
         if self.kind == Kind::Mod && !self.code {
             out += "  no code: content only, nothing to run\n";
         } else if self.kind == Kind::Mod {
@@ -118,6 +121,7 @@ impl Report {
 pub fn kind_of(path: &Path) -> Option<Kind> {
     match path.extension()?.to_str()? {
         "hmod" => Some(Kind::Mod),
+        "hnmod" => Some(Kind::NativeMod),
         "hpack" => Some(Kind::Modpack),
         "zip" => Some(Kind::ResourcePack),
         "hshader" => Some(Kind::Shader),

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

@@ -25,7 +25,7 @@ use std::{
 };
 
 const TARGET: &str = "wasm32-unknown-unknown";
-const SDK_GIT: &str = "{ git = \"https://github.com/ludovic111/horizon\" }";
+const SDK_GIT: &str = "{ git = \"https://github.com/horizon-rust/horizon\" }";
 
 fn main() -> ExitCode {
     // Cargo runs `cargo-horizon-mod horizon-mod <args>`.

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

@@ -1,5 +1,5 @@
 //! `cargo horizon-mod registry build|review|check|list`: the registry repository's CI
-//! (`ludovic111/horizon-mods`, docs/api/mod-index.md). Network-free: the
+//! (`horizon-rust/horizon-mods`, docs/api/mod-index.md). Network-free: the
 //! workflow downloads the files and publishes what this writes.
 use horizon_mods::index::{
     FILE_HOST,
@@ -8,7 +8,7 @@ use horizon_mods::index::{
 use std::path::Path;
 
 /// Where the registry's site is published (its icons).
-const SITE: &str = "https://ludovic111.github.io/horizon-mods/";
+const SITE: &str = "https://horizon-rust.github.io/horizon-mods/";
 
 const USAGE: &str = "usage: cargo horizon-mod registry build <checkout> --files <dir> --out <index.json> [--release <url>] [--site <url>] [--generated <time>]
        cargo horizon-mod registry review <base checkout> <head checkout> --author <login> [--json]

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

@@ -16,3 +16,20 @@ pub fn parse_identifier(raw: &str) -> Option<String> {
     });
     (ns_ok && path_ok).then(|| format!("{ns}:{path}"))
 }
+
+/// `Identifier.CODEC` parsing an entity id: lowercase namespace and path
+/// characters, `minecraft` when the namespace is left out.
+pub fn normalize_id(s: &str) -> Option<String> {
+    let (ns, path) = match s.split_once(':') {
+        Some((ns, path)) => (if ns.is_empty() { "minecraft" } else { ns }, path),
+        None => ("minecraft", s),
+    };
+    let ok = |c: char, slash: bool| {
+        c.is_ascii_lowercase()
+            || c.is_ascii_digit()
+            || matches!(c, '_' | '-' | '.')
+            || slash && c == '/'
+    };
+    (ns.chars().all(|c| ok(c, false)) && path.chars().all(|c| ok(c, true)))
+        .then(|| format!("{ns}:{path}"))
+}

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

@@ -22,3 +22,11 @@ pub fn number(tag: Option<&Tag>) -> Option<i64> {
         _ => return None,
     })
 }
+/// Any numeric tag as f64, keeping a float's or double's fraction.
+pub fn float(tag: Option<&Tag>) -> Option<f64> {
+    Some(match tag? {
+        Tag::Float(b) => f64::from(f32::from_bits(*b)),
+        Tag::Double(b) => f64::from_bits(*b),
+        other => number(Some(other))? as f64,
+    })
+}

crates/horizon-client-input/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "horizon-client-input"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+rust-version = "1.90"
+description = "The client's input layer: key bindings and their names, mouse, controllers, clipboard and window options"
+
+[dependencies]
+horizon-client-core = { path = "../horizon-client-core" }
+winit = "0.30.13"
+# The window icon.
+horizon-theme = { path = "../horizon-theme" }
+png = "0.18"
+arboard = { version = "3.6.1", default-features = false, features = ["wayland-data-control"] }
+# The DualSense's trigger effects (the `controllers` feature).
+horizon-dualsense = { path = "../horizon-dualsense", optional = true }
+
+[features]
+controllers = ["dep:horizon-dualsense"]
+
+[lints]
+workspace = true

crates/horizon-client-input/src/keybinds.rs

@@ -145,6 +145,22 @@ const KEYS: &[(&str, KeyCode)] = &[
     ("key.keyboard.period", KeyCode::Period),
     ("key.keyboard.slash", KeyCode::Slash),
     ("key.keyboard.caps.lock", KeyCode::CapsLock),
+    ("key.keyboard.world.1", KeyCode::IntlBackslash),
+    ("key.keyboard.international1", KeyCode::IntlRo),
+    ("key.keyboard.international3", KeyCode::IntlYen),
+    ("key.keyboard.lang1", KeyCode::Lang1),
+    ("key.keyboard.lang2", KeyCode::Lang2),
+    ("key.keyboard.lang3", KeyCode::Lang3),
+    ("key.keyboard.lang4", KeyCode::Lang4),
+    ("key.keyboard.lang5", KeyCode::Lang5),
+    ("key.keyboard.help", KeyCode::Help),
+    ("key.keyboard.select", KeyCode::Select),
+    ("key.keyboard.again", KeyCode::Again),
+    ("key.keyboard.undo", KeyCode::Undo),
+    ("key.keyboard.cut", KeyCode::Cut),
+    ("key.keyboard.copy", KeyCode::Copy),
+    ("key.keyboard.paste", KeyCode::Paste),
+    ("key.keyboard.find", KeyCode::Find),
     ("key.keyboard.f1", KeyCode::F1),
     ("key.keyboard.f2", KeyCode::F2),
     ("key.keyboard.f3", KeyCode::F3),
@@ -157,6 +173,18 @@ const KEYS: &[(&str, KeyCode)] = &[
     ("key.keyboard.f10", KeyCode::F10),
     ("key.keyboard.f11", KeyCode::F11),
     ("key.keyboard.f12", KeyCode::F12),
+    ("key.keyboard.f13", KeyCode::F13),
+    ("key.keyboard.f14", KeyCode::F14),
+    ("key.keyboard.f15", KeyCode::F15),
+    ("key.keyboard.f16", KeyCode::F16),
+    ("key.keyboard.f17", KeyCode::F17),
+    ("key.keyboard.f18", KeyCode::F18),
+    ("key.keyboard.f19", KeyCode::F19),
+    ("key.keyboard.f20", KeyCode::F20),
+    ("key.keyboard.f21", KeyCode::F21),
+    ("key.keyboard.f22", KeyCode::F22),
+    ("key.keyboard.f23", KeyCode::F23),
+    ("key.keyboard.f24", KeyCode::F24),
     ("key.keyboard.print.screen", KeyCode::PrintScreen),
     ("key.keyboard.scroll.lock", KeyCode::ScrollLock),
     ("key.keyboard.pause", KeyCode::Pause),
@@ -188,6 +216,36 @@ const KEYS: &[(&str, KeyCode)] = &[
     ("key.keyboard.keypad.0", KeyCode::Numpad0),
     ("key.keyboard.keypad.period", KeyCode::NumpadDecimal),
     ("key.keyboard.keypad.equal", KeyCode::NumpadEqual),
+    ("key.keyboard.keypad.comma", KeyCode::NumpadComma),
+    ("key.keyboard.keypad.backspace", KeyCode::NumpadBackspace),
+    (
+        "key.keyboard.keypad.left.parenthesis",
+        KeyCode::NumpadParenLeft,
+    ),
+    (
+        "key.keyboard.keypad.right.parenthesis",
+        KeyCode::NumpadParenRight,
+    ),
+    ("key.keyboard.keypad.hash", KeyCode::NumpadHash),
+    (
+        "key.keyboard.keypad.memory.store",
+        KeyCode::NumpadMemoryStore,
+    ),
+    (
+        "key.keyboard.keypad.memory.recall",
+        KeyCode::NumpadMemoryRecall,
+    ),
+    (
+        "key.keyboard.keypad.memory.clear",
+        KeyCode::NumpadMemoryClear,
+    ),
+    ("key.keyboard.keypad.memory.add", KeyCode::NumpadMemoryAdd),
+    (
+        "key.keyboard.keypad.memory.subtract",
+        KeyCode::NumpadMemorySubtract,
+    ),
+    ("key.keyboard.keypad.clear", KeyCode::NumpadClear),
+    ("key.keyboard.keypad.clear.entry", KeyCode::NumpadClearEntry),
     ("key.keyboard.menu", KeyCode::ContextMenu),
     ("key.keyboard.left.control", KeyCode::ControlLeft),
     ("key.keyboard.left.shift", KeyCode::ShiftLeft),

crates/horizon-client-input/src/lib.rs

@@ -0,0 +1,14 @@
+//! The client's input layer, below gameplay and screens: key bindings and their
+//! names, toggle keys, mouse settings, controllers, the clipboard and window
+//! options. horizon-client re-exports each module under its old path
+//! (`horizon_client::keybinds`, ...).
+#![forbid(unsafe_code)]
+pub mod clipboard;
+pub mod gamepad;
+pub mod input;
+pub mod interaction_input;
+pub mod key_names;
+pub mod keybinds;
+pub mod keymapping;
+pub mod mouse;
+pub mod window;

crates/horizon-client/Cargo.toml

@@ -10,6 +10,7 @@ description = "Horizon native development client"
 [dependencies]
 horizon-assets = { path = "../horizon-assets" }
 horizon-client-core = { path = "../horizon-client-core" }
+horizon-client-input = { path = "../horizon-client-input" }
 horizon-command = { path = "../horizon-command" }
 horizon-items = { path = "../horizon-items" }
 horizon-core = { path = "../horizon-core" }
@@ -55,7 +56,6 @@ horizon-theme = { path = "../horizon-theme" }
 # the anonymous "I'm playing" ping the game sends itself (`heartbeat.rs`).
 horizon-telemetry = { path = "../horizon-telemetry", default-features = false, features = ["live"] }
 horizon-bench = { path = "../horizon-bench" }
-arboard = { version = "3.6.1", default-features = false, features = ["wayland-data-control"] }
 zip = { version = "2", default-features = false, features = ["deflate"] }
 # Controllers (evdev + libudev on Linux, IOKit on macOS, Windows.Gaming.Input); the `controllers` feature.
 gilrs = { version = "0.11", optional = true }
@@ -90,7 +90,7 @@ default = ["audio", "controllers"]
 # Linux: the server build (`--no-default-features`, released as horizon-engine; docs/server.md).
 audio = ["dep:cpal"]
 # Controllers: gilrs, and the DualSense's own output. Without it only `horizon-ctl pad`'s virtual pad.
-controllers = ["dep:gilrs", "dep:horizon-dualsense"]
+controllers = ["dep:gilrs", "dep:horizon-dualsense", "horizon-client-input/controllers"]
 # Runs code mods (wasmtime and cranelift: a quarter of a clean build). On in every release build
 # (release.yml); the tests and probes don't need it. Content mods load without it.
 mods = ["horizon-mods/runtime"]

crates/horizon-client/examples/probe/menu_fixture.rs

@@ -7,6 +7,7 @@
 use horizon_client::{
     containers::{Furnace, FurnaceKind},
     crafting::Recipes,
+    furnace::FurnaceCooking,
     item_data::{canon_stack, parse_stack},
     items::Items,
     menu::{Env, Input, Kind, Menu},

crates/horizon-client/src/assets.rs

@@ -218,6 +218,8 @@ impl RenderAssets {
             sprites.insert(root, &format!("minecraft:block/destroy_stage_{stage}"))?;
         }
         sprites.finish();
+        // `finish` grows the buffer by doubling: keep only the bytes in use.
+        sprites.pixels.shrink_to_fit();
         Ok(Self {
             sprite_size: sprites.size,
             sprite_minimum_size: sprites.minimum_size,

crates/horizon-client/src/biome.rs

@@ -20,12 +20,68 @@ pub struct SpawnEntry {
     /// A `ConstantInt` count (sampling draws nothing).
     pub constant: bool,
 }
+/// A `natural_mob_spawns` / `spawn_overrides` entry list.
+pub fn parse_entries(list: &Value) -> Vec<SpawnEntry> {
+    list.as_array()
+        .into_iter()
+        .flatten()
+        .filter_map(|e| {
+            let count = &e["count"];
+            let (min, max, constant) = match count {
+                Value::Number(n) => {
+                    let n = n.as_u64().unwrap_or(1) as u32;
+                    (n, n, true)
+                }
+                c if c["type"].as_str() == Some("minecraft:constant") => {
+                    let n = c["value"].as_u64().unwrap_or(1) as u32;
+                    (n, n, true)
+                }
+                c => (
+                    c["min_inclusive"].as_u64().unwrap_or(1) as u32,
+                    c["max_inclusive"].as_u64().unwrap_or(1) as u32,
+                    false,
+                ),
+            };
+            Some(SpawnEntry {
+                entity: e["type"].as_str()?.to_owned(),
+                weight: e["weight"].as_u64().unwrap_or(1) as u32,
+                min,
+                max,
+                constant,
+            })
+        })
+        .collect()
+}
+/// `MobSpawnSettings.MobSpawnCost`.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct SpawnCost {
+    pub energy_budget: f64,
+    pub charge: f64,
+}
+/// The `spawn_costs` of a `natural_mob_spawns` value.
+pub fn parse_costs(costs: &Value) -> HashMap<String, SpawnCost> {
+    costs
+        .as_object()
+        .into_iter()
+        .flatten()
+        .map(|(k, c)| {
+            (
+                k.clone(),
+                SpawnCost {
+                    energy_budget: c["energy_budget"].as_f64().unwrap_or(0.0),
+                    charge: c["charge"].as_f64().unwrap_or(0.0),
+                },
+            )
+        })
+        .collect()
+}
+
 #[derive(Clone, Debug)]
 pub struct BiomeInfo {
     /// `natural_mob_spawns` by category (creature, monster, ...).
     pub spawns: HashMap<String, Vec<SpawnEntry>>,
     /// `natural_mob_spawns` spawn costs by entity type.
-    pub spawn_costs: HashMap<String, crate::mobs::spawn_selection::SpawnCost>,
+    pub spawn_costs: HashMap<String, SpawnCost>,
     /// The `gameplay/creature_world_gen_spawn_probability` attribute.
     pub creature_probability: f32,
     /// The `gameplay/increased_fire_burnout` attribute (jungles, swamps, peaks,
@@ -150,12 +206,12 @@ impl Biomes {
             };
             let categories = &natural["spawns_by_category"];
             for (category, entries) in categories.as_object().into_iter().flatten() {
-                let list = crate::mobs::spawn_selection::parse_entries(entries);
+                let list = parse_entries(entries);
                 spawns.insert(category.clone(), list);
             }
             list.push(BiomeInfo {
                 spawns,
-                spawn_costs: crate::mobs::spawn_selection::parse_costs(&natural["spawn_costs"]),
+                spawn_costs: parse_costs(&natural["spawn_costs"]),
                 creature_probability:
                     attributes["minecraft:gameplay/creature_world_gen_spawn_probability"]
                         .as_f64()

crates/horizon-client/src/block_entity_item.rs

@@ -35,6 +35,25 @@ pub fn op_warning(stack: &crate::items::ItemStack) -> bool {
     data(stack).is_some_and(|(id, _)| OP_ONLY.contains(&id.as_str()))
 }
 
+/// `SpawnEggItem.shouldPrintOpWarning` for a player with game master
+/// permission: a spawn egg carries data of an op-only entity type
+/// (`EntityTypes.OP_ONLY_CUSTOM_DATA`).
+pub fn spawn_egg_op_warning(stack: &crate::items::ItemStack) -> bool {
+    stack.item.ends_with("_spawn_egg")
+        && matches!(
+            stack
+                .data()
+                .and_then(|d| d.other("minecraft:entity_data"))
+                .and_then(|data| data.get("id")),
+            Some(Tag::String(id)) if matches!(
+                id.to_string_lossy().as_str(),
+                "minecraft:falling_block"
+                    | "minecraft:command_block_minecart"
+                    | "minecraft:spawner_minecart"
+            )
+        )
+}
+
 /// `Spawner.getSpawnEntityDisplayName` (`SpawnData.entity.id` of the item's
 /// data, which `ItemStack.addDetailsToTooltip` reads for spawners and trial
 /// spawners alike): the entity type a spawner item spawns.

crates/horizon-client/src/block_entity_render.rs

@@ -97,6 +97,16 @@ pub fn diffuse(normal: Vec3, lights: (Vec3, Vec3)) -> f32 {
 pub fn vertex_light(packed: u8) -> u32 {
     (u32::from(packed >> 4) * 16) | ((u32::from(packed & 15) * 16) << 8)
 }
+/// `ChestRenderer.xmasTextures`: `SpecialDates.isExtendedChristmas` (24 to 26
+/// December in the local time zone), read once when the renderer is created.
+fn extended_christmas() -> bool {
+    use chrono::Datelike;
+    static XMAS: std::sync::OnceLock<bool> = std::sync::OnceLock::new();
+    *XMAS.get_or_init(|| {
+        let now = chrono::Local::now();
+        now.month() == 12 && (24..=26).contains(&now.day())
+    })
+}
 fn pack_color(rgb: u32, alpha: u32, brightness: f32) -> u32 {
     let c = |shift: u32| (((rgb >> shift) & 255) as f32 * brightness) as u32;
     alpha << 24 | c(0) << 16 | c(8) << 8 | c(16)
@@ -1173,11 +1183,25 @@ impl BlockEntityRenderer {
                 }
             }
             Kind::Chest {
+                block,
                 texture,
                 part,
                 y_rot,
                 ..
             } => {
+                // ChestRenderer.getChestMaterial: normal and trapped chests use the christmas
+                // sprites on 24-26 December. Copper and ender chests keep theirs.
+                let texture = if matches!(block.as_str(), "chest" | "trapped_chest")
+                    && extended_christmas()
+                {
+                    match part {
+                        ChestPart::Single => "entity/chest/christmas",
+                        ChestPart::Left => "entity/chest/christmas_left",
+                        ChestPart::Right => "entity/chest/christmas_right",
+                    }
+                } else {
+                    *texture
+                };
                 let model = match part {
                     ChestPart::Single => "chest",
                     ChestPart::Left => "double_chest_left",

crates/horizon-client/src/brewing.rs

@@ -4,8 +4,8 @@
 //! `BrewingStandBlockEntity.serverTick`.
 pub use crate::chunk::block_entity::BrewingStand;
 use crate::{
-    containers::Providers,
     items::{ItemStack, Items},
+    providers::Providers,
 };
 use serde_json::Value;
 use std::{collections::HashSet, fs, path::Path};

crates/horizon-client/src/camera.rs

@@ -772,6 +772,27 @@ pub fn bob_matrix(state: &BobState, damage_tilt_strength: f64, bob_view_option:
     pose
 }
 
+/// The spinning effect `GameRenderer.renderLevel` multiplies into the level's
+/// projection after the bob: a skew about a tilted axis, from a portal's or
+/// Nausea's intensity (already scaled by Distortion Effects) and the angle in
+/// degrees. The first-person hand keeps its own projection without it.
+pub fn spinning_effect_matrix(intensity: f32, angle_degrees: f32) -> glam::Mat4 {
+    if intensity <= 0.0 {
+        return glam::Mat4::IDENTITY;
+    }
+    let mut skew = 5.0 / (intensity * intensity + 5.0) - intensity * 0.04;
+    skew *= skew;
+    let axis = glam::Vec3::new(
+        0.0,
+        std::f32::consts::SQRT_2 / 2.0,
+        std::f32::consts::SQRT_2 / 2.0,
+    );
+    let angle = angle_degrees * DEG_TO_RAD;
+    glam::Mat4::from_axis_angle(axis, angle)
+        * glam::Mat4::from_scale(glam::Vec3::new(1.0 / skew, 1.0, 1.0))
+        * glam::Mat4::from_axis_angle(axis, -angle)
+}
+
 #[cfg(test)]
 mod tests {
     #[test]

crates/horizon-client/src/command_block.rs

@@ -2,8 +2,9 @@
 //! count comparators read, the output it keeps, and the powered, automatic
 //! and condition flags `CommandBlock.tick` runs on.
 pub use crate::chunk::block_entity::CommandBlock;
-use crate::{
-    save::{number, text},
+use horizon_client_core::{
+    nbt_value::{number, text},
+    scoreboard,
     text::Text,
 };
 use horizon_world::nbt::Tag;
@@ -108,7 +109,7 @@ impl CommandBlock {
             last_output: track_output
                 .then(|| tag.get("LastOutput"))
                 .flatten()
-                .map(|t| crate::scoreboard::comp_text(&crate::scoreboard::tag_to_json(t))),
+                .map(|t| scoreboard::comp_text(&scoreboard::tag_to_json(t))),
             update_last_execution,
             last_execution: if update_last_execution {
                 number(tag.get("LastExecution")).unwrap_or(-1)
@@ -164,7 +165,7 @@ impl CommandBlock {
     pub fn name(&self) -> Text {
         self.custom_name.as_ref().map_or_else(
             || Text::literal("@"),
-            |t| crate::scoreboard::comp_text(&crate::scoreboard::tag_to_json(t)),
+            |t| scoreboard::comp_text(&scoreboard::tag_to_json(t)),
         )
     }
 }

crates/horizon-client/src/containers.rs

@@ -5,12 +5,8 @@ pub use crate::chunk::block_entity::{
     Banner, Beacon, BlockEntity, Campfire, ChiseledBookshelf, Crafter, CreakingHeart, EndGateway,
     Furnace, FurnaceKind, Jukebox, Lectern, Skull, SkullSkin,
 };
-use crate::{
-    crafting::Recipes,
-    items::{ItemStack, Items},
-};
-use serde_json::Value;
-use std::{collections::HashMap, fs, path::Path, sync::Arc};
+use crate::items::ItemStack;
+use std::collections::HashMap;
 
 impl FurnaceKind {
     pub fn recipe_type(self) -> &'static str {
@@ -380,283 +376,7 @@ impl BlockEntity {
         }
     }
 }
-/// Evaluator for `context_int_provider` / `context_float_provider` values.
-pub struct Providers {
-    ints: HashMap<String, Value>,
-    floats: HashMap<String, Value>,
-}
-fn load_dir(dir: &Path, prefix: &str, out: &mut HashMap<String, Value>) {
-    let Ok(entries) = fs::read_dir(dir) else {
-        return;
-    };
-    for e in entries.flatten() {
-        let p = e.path();
-        let name = p
-            .file_stem()
-            .and_then(|s| s.to_str())
-            .unwrap_or("")
-            .to_owned();
-        if p.is_dir() {
-            load_dir(&p, &format!("{prefix}{name}/"), out);
-        } else if let Ok(bytes) = fs::read(&p)
-            && let Ok(v) = serde_json::from_slice(&bytes)
-        {
-            out.insert(format!("minecraft:{prefix}{name}"), v);
-        }
-    }
-}
-impl Providers {
-    pub fn load(root: &Path) -> Self {
-        let mut ints = HashMap::new();
-        let mut floats = HashMap::new();
-        load_dir(
-            &root.join("data/minecraft/context_int_provider"),
-            "",
-            &mut ints,
-        );
-        load_dir(
-            &root.join("data/minecraft/context_float_provider"),
-            "",
-            &mut floats,
-        );
-        Self { ints, floats }
-    }
-    fn eval(v: &Value, fast: bool, table: &HashMap<String, Value>, depth: u32) -> f64 {
-        if depth > 16 {
-            return 0.0;
-        }
-        match v {
-            Value::Number(n) => n.as_f64().unwrap_or(0.0),
-            Value::String(name) => table
-                .get(name)
-                .map_or(0.0, |v| Self::eval(v, fast, table, depth + 1)),
-            Value::Object(o) => {
-                let f =
-                    |k: &str| Self::eval(o.get(k).unwrap_or(&Value::Null), fast, table, depth + 1);
-                match o.get("type").and_then(Value::as_str).unwrap_or("") {
-                    "minecraft:div" => {
-                        let r = f("right");
-                        if r == 0.0 {
-                            0.0
-                        } else {
-                            (f("left") / r).trunc()
-                        }
-                    }
-                    "minecraft:mul" => f("left") * f("right"),
-                    "minecraft:add" | "minecraft:sum" => f("left") + f("right"),
-                    "minecraft:sub" => f("left") - f("right"),
-                    "minecraft:constant" => f("value"),
-                    "minecraft:conditional" => {
-                        // The only condition in the pinned data: block/fast_cooking.
-                        let condition = o.get("condition").and_then(Value::as_str)
-                            == Some("minecraft:block/fast_cooking");
-                        if condition && fast {
-                            f("on_true")
-                        } else {
-                            f("on_false")
-                        }
-                    }
-                    _ => 0.0,
-                }
-            }
-            _ => 0.0,
-        }
-    }
-    /// A plain `context_int_provider` value or reference (no context conditions).
-    pub fn int_value(&self, v: &Value) -> i32 {
-        Self::eval(v, false, &self.ints, 0) as i32
-    }
-    /// A plain `context_float_provider` value or reference; `default` when absent.
-    pub fn float_value(&self, v: &Value, default: f32) -> f32 {
-        if v.is_null() {
-            default
-        } else {
-            Self::eval(v, false, &self.floats, 0) as f32
-        }
-    }
-    #[cfg(test)]
-    pub fn empty() -> Self {
-        Self {
-            ints: HashMap::new(),
-            floats: HashMap::new(),
-        }
-    }
-    pub fn burn_time(&self, items: &Items, stack: &ItemStack, fast: bool) -> i32 {
-        items
-            .get(&stack.item)
-            .and_then(|i| i.fuel.as_ref())
-            .map_or(0, |(time, _)| Self::eval(time, fast, &self.ints, 0) as i32)
-    }
-    pub fn speed(&self, items: &Items, stack: &ItemStack, fast: bool) -> f32 {
-        items
-            .get(&stack.item)
-            .and_then(|i| i.fuel.as_ref())
-            .map_or(1.0, |(_, speed)| {
-                Self::eval(speed, fast, &self.floats, 0) as f32
-            })
-    }
-}
-fn remainder(item: &str) -> Option<&'static str> {
-    match item {
-        "minecraft:lava_bucket" | "minecraft:water_bucket" | "minecraft:milk_bucket" => {
-            Some("minecraft:bucket")
-        }
-        _ => None,
-    }
-}
-impl Furnace {
-    /// `AbstractFurnaceBlockEntity.setItem` on the input slot: anything but
-    /// the same item with the same components restarts cooking, with the
-    /// total time of the new input's recipe (200 ticks without one).
-    pub fn set_input(&mut self, recipes: &Recipes, stack: Option<ItemStack>) {
-        let same = match (&self.items[0], &stack) {
-            (Some(old), Some(new)) => old.same_item_same_components(new),
-            _ => false,
-        };
-        self.items[0] = stack;
-        if !same {
-            self.cooking_total = self.items[0]
-                .as_ref()
-                .and_then(|input| recipes.cook(self.kind.recipe_type(), input))
-                .map_or(200, |recipe| total_time(recipe.time, self.speed));
-            self.cooking_timer = 0;
-        }
-    }
-    /// `recipesUsed`, each recipe with its `experience` (0 for one this data pack does
-    /// not have), in the order `getRecipesToAwardAndPopExperience` pays them.
-    pub fn recipe_experience(&self, recipes: &Recipes) -> Vec<(u32, f32)> {
-        self.recipes_used
-            .iter()
-            .map(|(id, count)| (*count, recipes.cooking_experience(id)))
-            .collect()
-    }
-    /// A menu click wrote its slots into `items`, and `before` was the input
-    /// slot until then: the menu called `setItem` on it only if it changed
-    /// (`Slot.setByPlayer`; partial takes and merges keep the stack).
-    pub fn input_clicked(&mut self, recipes: &Recipes, before: Option<ItemStack>) {
-        if self.items[0] != before {
-            let after = std::mem::replace(&mut self.items[0], before);
-            self.set_input(recipes, after);
-        }
-    }
-    /// One server tick. Returns `Some(lit)` when the LIT block state must change.
-    pub fn tick(
-        &mut self,
-        recipes: &Recipes,
-        items: &Items,
-        providers: &Providers,
-    ) -> Option<bool> {
-        let was_lit = self.lit_remaining > 0;
-        let mut lit = false;
-        if self.lit_remaining > 0 {
-            self.lit_remaining -= 1;
-            lit = self.lit_remaining > 0;
-        }
-        let fast = self.kind.fast();
-        let has_ingredient = self.items[0].is_some();
-        let has_fuel = self.items[1].is_some();
-        if lit || has_fuel && has_ingredient {
-            if let Some(ingredient) = self.items[0].clone() {
-                if let Some(recipe) = recipes.cook(self.kind.recipe_type(), &ingredient) {
-                    if self.cooking_timer == 0 {
-                        self.cooking_total = total_time(recipe.time, self.speed);
-                    }
-                    let max = items.get(&recipe.result.item).map_or(64, |i| i.max_stack);
-                    let can_burn = match &self.items[2] {
-                        None => true,
-                        Some(out) => {
-                            out.item == recipe.result.item && out.count + recipe.result.count <= max
-                        }
-                    };
-                    if can_burn {
-                        if !lit {
-                            let fuel = self.items[1].clone();
-                            let time = fuel
-                                .as_ref()
-                                .map_or(0, |f| providers.burn_time(items, f, fast));
-                            let speed = fuel
-                                .as_ref()
-                                .map_or(1.0, |f| providers.speed(items, f, fast));
-                            self.lit_remaining = time;
-                            self.lit_total = time;
-                            self.speed = speed;
-                            if self.cooking_total > 0 && self.cooking_timer < self.cooking_total {
-                                let ratio = self.cooking_timer as f32 / self.cooking_total as f32;
-                                self.cooking_total = total_time(recipe.time, self.speed);
-                                self.cooking_timer =
-                                    (ratio * self.cooking_total as f32).ceil() as i32;
-                            }
-                            if time > 0 {
-                                if let Some(f) = self.items[1].as_mut() {
-                                    let item = f.item.clone();
-                                    f.count -= 1;
-                                    if f.count == 0 {
-                                        self.items[1] = remainder(&item).map(|r| ItemStack {
-                                            item: Arc::from(r),
-                                            count: 1,
-                                            damage: 0,
-                                            extra: None,
-                                        });
-                                    }
-                                }
-                                lit = true;
-                            }
-                        }
-                        if lit {
-                            self.cooking_timer += 1;
-                            if self.cooking_timer >= self.cooking_total {
-                                self.cooking_timer = 0;
-                                self.cooking_total = total_time(recipe.time, self.speed);
-                                match &mut self.items[2] {
-                                    Some(out) => out.count += recipe.result.count,
-                                    None => self.items[2] = Some(recipe.result.clone()),
-                                }
-                                *self
-                                    .recipes_used
-                                    .entry(recipe_used_key(&recipe.id))
-                                    .or_insert(0) += 1;
-                                // AbstractFurnaceBlockEntity.burn: drying a wet sponge fills
-                                // the bucket in the fuel slot.
-                                if self.items[0]
-                                    .as_ref()
-                                    .is_some_and(|i| &*i.item == "minecraft:wet_sponge")
-                                    && self.items[1]
-                                        .as_ref()
-                                        .is_some_and(|f| &*f.item == "minecraft:bucket")
-                                {
-                                    self.items[1] =
-                                        Some(ItemStack::new("minecraft:water_bucket", 1));
-                                }
-                                if let Some(i) = self.items[0].as_mut() {
-                                    i.count -= 1;
-                                    if i.count == 0 {
-                                        self.items[0] = None;
-                                    }
-                                }
-                            }
-                        } else {
-                            self.cooking_timer = 0;
-                        }
-                    } else {
-                        self.cooking_timer = 0;
-                    }
-                }
-            } else {
-                self.cooking_timer = 0;
-            }
-        } else if self.cooking_timer > 0 {
-            self.cooking_timer = (self.cooking_timer - 2).clamp(0, self.cooking_total);
-        }
-        (was_lit != lit).then_some(lit)
-    }
-}
-fn total_time(time: u32, speed: f32) -> i32 {
-    if speed > 0.0 {
-        (time as f32 / speed).ceil() as i32
-    } else {
-        time as i32
-    }
-}
+pub use crate::providers::Providers;
 
 /// `AbstractFurnaceBlockEntity.createExperience`: `count * experience`, floored, and one
 /// more with the chance of what is left over (a level random draw only when there is some).

crates/horizon-client/src/creative.rs

@@ -355,6 +355,19 @@ impl Creative {
     pub fn search_items(&self) -> &[ItemStack] {
         &self.search_items
     }
+    /// Opening the screen: vanilla rebuilds CreativeModeInventoryScreen, whose
+    /// init() makes a fresh search box and a zeroed scrollbar; only the tab
+    /// persists (its static selectedTab). selectTab on the reopened screen
+    /// takes the oldTab != tab branch, so it empties and refocuses the box.
+    pub fn reopen(&mut self) {
+        self.search.set_value("");
+        self.release();
+        self.scroll = 0.0;
+        self.search.focused = self.tab().search;
+        if self.search.focused {
+            self.search.reset_blink();
+        }
+    }
     /// Indices into `search_items` that CreativeModeInventoryScreen.refreshSearchResults
     /// shows for `term`: the whole tab when empty, the tag tree after `#`, else
     /// the name tree, both over vanilla's suffix arrays (substring matches,
@@ -575,6 +588,8 @@ pub enum DisplayClick {
     Nothing,
     /// SWAP: the hotbar slot gets a full stack of the item.
     Hotbar(usize, ItemStack),
+    /// SWAP with button 40 (Key F): the off-hand gets a full stack of the item.
+    Offhand(ItemStack),
     /// THROW: a copy of the item is dropped.
     Drop(ItemStack),
 }
@@ -596,8 +611,11 @@ pub fn click_display(
     match input {
         Input::Swap => {
             return match shown {
-                Some(s) => DisplayClick::Hotbar(button as usize, copy(s, max(s))),
-                None => DisplayClick::Nothing,
+                Some(s) if button == 40 => DisplayClick::Offhand(copy(s, max(s))),
+                Some(s) if (0..9).contains(&button) => {
+                    DisplayClick::Hotbar(button as usize, copy(s, max(s)))
+                }
+                Some(_) | None => DisplayClick::Nothing,
             };
         }
         Input::Clone => {
@@ -720,11 +738,15 @@ mod tests {
             display(Some(stack("ender_pearl", 9)), 1, Pickup).0,
             Some(stack("ender_pearl", 8))
         );
-        // Number keys fill a hotbar slot, Q drops copies, pick block clones.
+        // Number keys fill a hotbar slot, F fills off-hand, Q drops copies, pick block clones.
         assert_eq!(
             display(None, 3, Swap).1,
             DisplayClick::Hotbar(3, stack("stone", 64))
         );
+        assert_eq!(
+            display(None, 40, Swap).1,
+            DisplayClick::Offhand(stack("stone", 64))
+        );
         assert_eq!(
             display(None, 0, Throw).1,
             DisplayClick::Drop(stack("stone", 1))

crates/horizon-client/src/effects.rs

@@ -29,6 +29,10 @@ impl EffectInstance {
     fn infinite(&self) -> bool {
         self.duration == -1
     }
+    /// `MobEffectInstance.endsWithin`.
+    pub fn ends_within(&self, ticks: i32) -> bool {
+        !self.infinite() && self.duration <= ticks
+    }
     fn shorter_than(&self, other: &Self) -> bool {
         !self.infinite() && (self.duration < other.duration || other.infinite())
     }

crates/horizon-client/src/furnace.rs

@@ -0,0 +1,173 @@
+//! `AbstractFurnaceBlockEntity`'s cooking over the furnace data the chunk
+//! holds (`containers::Furnace`): it needs the recipes, so it lives above them.
+use crate::{
+    containers::{Furnace, recipe_used_key},
+    crafting::Recipes,
+    items::{ItemStack, Items},
+    providers::Providers,
+};
+use std::sync::Arc;
+
+/// The furnace methods that read the recipes.
+pub trait FurnaceCooking {
+    /// `AbstractFurnaceBlockEntity.setItem` on the input slot: anything but
+    /// the same item with the same components restarts cooking, with the
+    /// total time of the new input's recipe (200 ticks without one).
+    fn set_input(&mut self, recipes: &Recipes, stack: Option<ItemStack>);
+    /// `recipesUsed`, each recipe with its `experience` (0 for one this data pack does
+    /// not have), in the order `getRecipesToAwardAndPopExperience` pays them.
+    fn recipe_experience(&self, recipes: &Recipes) -> Vec<(u32, f32)>;
+    /// A menu click wrote its slots into `items`, and `before` was the input
+    /// slot until then: the menu called `setItem` on it only if it changed
+    /// (`Slot.setByPlayer`; partial takes and merges keep the stack).
+    fn input_clicked(&mut self, recipes: &Recipes, before: Option<ItemStack>);
+    /// One server tick. Returns `Some(lit)` when the LIT block state must change.
+    fn tick(&mut self, recipes: &Recipes, items: &Items, providers: &Providers) -> Option<bool>;
+}
+fn remainder(item: &str) -> Option<&'static str> {
+    match item {
+        "minecraft:lava_bucket" | "minecraft:water_bucket" | "minecraft:milk_bucket" => {
+            Some("minecraft:bucket")
+        }
+        _ => None,
+    }
+}
+impl FurnaceCooking for Furnace {
+    fn set_input(&mut self, recipes: &Recipes, stack: Option<ItemStack>) {
+        let same = match (&self.items[0], &stack) {
+            (Some(old), Some(new)) => old.same_item_same_components(new),
+            _ => false,
+        };
+        self.items[0] = stack;
+        if !same {
+            self.cooking_total = self.items[0]
+                .as_ref()
+                .and_then(|input| recipes.cook(self.kind.recipe_type(), input))
+                .map_or(200, |recipe| total_time(recipe.time, self.speed));
+            self.cooking_timer = 0;
+        }
+    }
+    fn recipe_experience(&self, recipes: &Recipes) -> Vec<(u32, f32)> {
+        self.recipes_used
+            .iter()
+            .map(|(id, count)| (*count, recipes.cooking_experience(id)))
+            .collect()
+    }
+    fn input_clicked(&mut self, recipes: &Recipes, before: Option<ItemStack>) {
+        if self.items[0] != before {
+            let after = std::mem::replace(&mut self.items[0], before);
+            self.set_input(recipes, after);
+        }
+    }
+    fn tick(&mut self, recipes: &Recipes, items: &Items, providers: &Providers) -> Option<bool> {
+        let was_lit = self.lit_remaining > 0;
+        let mut lit = false;
+        if self.lit_remaining > 0 {
+            self.lit_remaining -= 1;
+            lit = self.lit_remaining > 0;
+        }
+        let fast = self.kind.fast();
+        let has_ingredient = self.items[0].is_some();
+        let has_fuel = self.items[1].is_some();
+        if lit || has_fuel && has_ingredient {
+            if let Some(ingredient) = self.items[0].clone() {
+                if let Some(recipe) = recipes.cook(self.kind.recipe_type(), &ingredient) {
+                    if self.cooking_timer == 0 {
+                        self.cooking_total = total_time(recipe.time, self.speed);
+                    }
+                    let max = items.get(&recipe.result.item).map_or(64, |i| i.max_stack);
+                    let can_burn = match &self.items[2] {
+                        None => true,
+                        Some(out) => {
+                            out.item == recipe.result.item && out.count + recipe.result.count <= max
+                        }
+                    };
+                    if can_burn {
+                        if !lit {
+                            let fuel = self.items[1].clone();
+                            let time = fuel
+                                .as_ref()
+                                .map_or(0, |f| providers.burn_time(items, f, fast));
+                            let speed = fuel
+                                .as_ref()
+                                .map_or(1.0, |f| providers.speed(items, f, fast));
+                            self.lit_remaining = time;
+                            self.lit_total = time;
+                            self.speed = speed;
+                            if self.cooking_total > 0 && self.cooking_timer < self.cooking_total {
+                                let ratio = self.cooking_timer as f32 / self.cooking_total as f32;
+                                self.cooking_total = total_time(recipe.time, self.speed);
+                                self.cooking_timer =
+                                    (ratio * self.cooking_total as f32).ceil() as i32;
+                            }
+                            if time > 0 {
+                                if let Some(f) = self.items[1].as_mut() {
+                                    let item = f.item.clone();
+                                    f.count -= 1;
+                                    if f.count == 0 {
+                                        self.items[1] = remainder(&item).map(|r| ItemStack {
+                                            item: Arc::from(r),
+                                            count: 1,
+                                            damage: 0,
+                                            extra: None,
+                                        });
+                                    }
+                                }
+                                lit = true;
+                            }
+                        }
+                        if lit {
+                            self.cooking_timer += 1;
+                            if self.cooking_timer >= self.cooking_total {
+                                self.cooking_timer = 0;
+                                self.cooking_total = total_time(recipe.time, self.speed);
+                                match &mut self.items[2] {
+                                    Some(out) => out.count += recipe.result.count,
+                                    None => self.items[2] = Some(recipe.result.clone()),
+                                }
+                                *self
+                                    .recipes_used
+                                    .entry(recipe_used_key(&recipe.id))
+                                    .or_insert(0) += 1;
+                                // AbstractFurnaceBlockEntity.burn: drying a wet sponge fills
+                                // the bucket in the fuel slot.
+                                if self.items[0]
+                                    .as_ref()
+                                    .is_some_and(|i| &*i.item == "minecraft:wet_sponge")
+                                    && self.items[1]
+                                        .as_ref()
+                                        .is_some_and(|f| &*f.item == "minecraft:bucket")
+                                {
+                                    self.items[1] =
+                                        Some(ItemStack::new("minecraft:water_bucket", 1));
+                                }
+                                if let Some(i) = self.items[0].as_mut() {
+                                    i.count -= 1;
+                                    if i.count == 0 {
+                                        self.items[0] = None;
+                                    }
+                                }
+                            }
+                        } else {
+                            self.cooking_timer = 0;
+                        }
+                    } else {
+                        self.cooking_timer = 0;
+                    }
+                }
+            } else {
+                self.cooking_timer = 0;
+            }
+        } else if self.cooking_timer > 0 {
+            self.cooking_timer = (self.cooking_timer - 2).clamp(0, self.cooking_total);
+        }
+        (was_lit != lit).then_some(lit)
+    }
+}
+fn total_time(time: u32, speed: f32) -> i32 {
+    if speed > 0.0 {
+        (time as f32 / speed).ceil() as i32
+    } else {
+        time as i32
+    }
+}

crates/horizon-client/src/game.rs

@@ -222,6 +222,7 @@ use horizon_client::{
     entities::{Experience, ExperienceOrb, ItemEntity},
     environment::Environment,
     first_person::{Hand, SwingAnimation},
+    furnace::FurnaceCooking,
     gfx::{Frame, Renderer},
     hud::{HudAtlas, HudBatch, rgba},
     hud_layout, hud_overlays,
@@ -585,8 +586,8 @@ struct GameLevel<'w> {
     cart_boxes: Vec<([f64; 3], [f64; 3])>,
     /// The item frames a comparator reads through a conductor.
     item_frames: &'w [horizon_client::entities::ItemFrame],
-    /// Each minecart's kind and comparator signal, in `cart_boxes` order.
-    cart_signals: Vec<(minecarts::CartKind, i32)>,
+    /// The minecarts, in `cart_boxes` order, for a detector rail's comparator.
+    carts: &'w [minecarts::Minecart],
     /// Arrow and thrown trident boxes (wooden buttons).
     arrow_boxes: Vec<([f64; 3], [f64; 3])>,
     /// The other entities that keep blocks from being placed into them.
@@ -670,15 +671,22 @@ impl EntityObstructionWorld for BuildingObstruction {
     }
 }
 impl GameLevel<'_> {
-    /// The mobs that trigger plates and tripwires: living entities that don't
-    /// ignore block triggers (`Entity.isIgnoringBlockTriggers`: bats; armor
-    /// stands are not in `mobs`).
+    /// The living entities that trigger plates and tripwires and don't ignore
+    /// block triggers (`Entity.isIgnoringBlockTriggers`: bats and marker armor
+    /// stands). Armor stands live apart from `mobs`.
     fn mob_trigger_boxes(&self) -> impl Iterator<Item = Aabb> + '_ {
         self.blockers
             .mobs
             .iter()
             .filter(|m| !m.removed && m.species() != horizon_client::mobs::Species::Bat)
             .map(Mob::bounds)
+            .chain(
+                self.blockers
+                    .armor_stands
+                    .iter()
+                    .filter(|s| !s.marker)
+                    .map(|s| s.bounds()),
+            )
     }
     /// The non-living entities that trigger plates and tripwires (boats,
     /// crystals, primed TNT, falling blocks, item entities, experience orbs and
@@ -730,24 +738,36 @@ impl GameLevel<'_> {
             Vec3::new(x + 0.8, y + 0.8, z + 0.8),
         );
         let mut container = None;
-        for ((lo, hi), &(kind, signal)) in self.cart_boxes.iter().zip(&self.cart_signals) {
-            let cart = Aabb::new(
+        for ((lo, hi), cart) in self.cart_boxes.iter().zip(self.carts) {
+            let bounds = Aabb::new(
                 Vec3::new(lo[0], lo[1], lo[2]),
                 Vec3::new(hi[0], hi[1], hi[2]),
             );
-            if !area.intersects(cart) {
+            if !area.intersects(bounds) {
                 continue;
             }
-            match kind {
+            match cart.kind {
                 minecarts::CartKind::CommandBlock => return 0,
                 minecarts::CartKind::Chest | minecarts::CartKind::Hopper => {
-                    container = container.or(Some(signal));
+                    // Counted here, for the cart a comparator reads, not for
+                    // every cart on every block tick.
+                    container = container.or_else(|| Some(self.cart_signal(cart)));
                 }
                 _ => {}
             }
         }
         container.unwrap_or(0)
     }
+    /// A container minecart's comparator signal: its open menu's slots while
+    /// someone has it open, else its own.
+    fn cart_signal(&self, cart: &minecarts::Minecart) -> i32 {
+        let key = (i32::MAX - 15, minecarts::CART_KEY_Y, cart.id as i32);
+        let slots = match self.world.block_entities.get(&key) {
+            Some(BlockEntity::Chest(open)) => open,
+            _ => &cart.items,
+        };
+        minecarts::Minecart::container_signal(slots, self.items)
+    }
     /// Every entity box that blocks building: the players who aren't
     /// spectators, the minecarts and the `Blockers` (a removed mob or a marker
     /// armor stand, whose box is empty, doesn't).
@@ -1177,6 +1197,8 @@ struct WorldRest {
     end_environment: Environment,
     behaviours: Behaviours,
     player_arm: Option<horizon_client::mobs::Part>,
+    /// The slim model's right arm (3 pixels wide).
+    player_arm_slim: Option<horizon_client::mobs::Part>,
     player_type: Option<Arc<horizon_client::mobs::MobType>>,
     /// `SpinAttackEffectModel` (Riptide's spinning boxes).
     spin_attack: Option<horizon_client::mobs::Part>,
@@ -1249,8 +1271,12 @@ impl Resources {
     fn threads(&self) -> usize {
         self.core.threads
     }
-    fn player_arm(&self) -> &Option<horizon_client::mobs::Part> {
-        &self.rest().player_arm
+    fn player_arm(&self, slim: bool) -> &Option<horizon_client::mobs::Part> {
+        if slim {
+            &self.rest().player_arm_slim
+        } else {
+            &self.rest().player_arm
+        }
     }
     fn player_type(&self) -> &Option<Arc<horizon_client::mobs::MobType>> {
         &self.rest().player_type
@@ -2841,7 +2867,6 @@ impl Game<'_> {
                 )
             })
             .collect();
-        let cart_signals = self.cart_signals();
         let arrow_boxes = self
             .creatures
             .projectiles
@@ -2885,7 +2910,7 @@ impl Game<'_> {
         let mut level = GameLevel {
             cart_boxes,
             item_frames: &self.item_frames,
-            cart_signals,
+            carts: &self.carts,
             arrow_boxes,
             blockers,
             dropped: &self.dropped,
@@ -2912,7 +2937,13 @@ impl Game<'_> {
             behaviours: self.res.behaviours(),
             items: self.res.items(),
             recipes: self.res.recipes(),
-            loot: horizon_client::structure_blocks::loot_data(&self.options.resources),
+            // A client rolls no loot (LootTable.getRandomItems needs a
+            // ServerLevel): it doesn't load the tables on its game thread.
+            loot: if self.remote.is_some() {
+                None
+            } else {
+                horizon_client::structure_blocks::loot_data(&self.options.resources)
+            },
             registry: self.pack.assets.registry,
             rules,
             difficulty: i32::from(self.ui.difficulty),
@@ -5259,8 +5290,13 @@ impl Game<'_> {
                 MotionEvent::Snowflake { position, velocity } => self.snowflake(position, velocity),
                 MotionEvent::EnterBlock { state } => self.trigger_enter_block(state),
                 MotionEvent::HoneySlide {
-                    sound, particles, ..
+                    pos,
+                    sound,
+                    particles,
                 } => {
+                    if self.world.game_time % 20 == 0 {
+                        self.trigger_honey_slide([pos.x, pos.y, pos.z]);
+                    }
                     if sound {
                         self.audio
                             .play("minecraft:block.honey_block.slide", Some(feet), 1.0, 1.0);
@@ -5624,8 +5660,10 @@ impl Game<'_> {
         if self.lan_acting.is_some() {
             return;
         }
-        // MouseHandler.grabMouse never captures an inactive window.
-        if capture && !self.focused {
+        // MouseHandler.grabMouse never captures an inactive window, and vanilla
+        // grabs only on `setScreen(null)`: the pack prompt and server dialogs
+        // are screens over the world that keep the pointer.
+        if capture && (!self.focused || self.server_packs.prompt.is_some() || self.dialog_open()) {
             return;
         }
         // The container screen's press state belongs to the screen: a screen
@@ -5694,17 +5732,22 @@ impl Game<'_> {
     fn apply_cursor_icon(&mut self) {
         use horizon_client::widgets::Cursor;
         let wanted = horizon_client::widgets::take_cursor();
-        if wanted == self.cursor_icon {
+        let effective = if self.settings.allow_cursor_changes {
+            wanted
+        } else {
+            Cursor::Arrow
+        };
+        if effective == self.cursor_icon {
             return;
         }
         if let Some(window) = &self.window {
-            window.set_cursor(match wanted {
+            window.set_cursor(match effective {
                 Cursor::Arrow => winit::window::CursorIcon::Default,
                 Cursor::PointingHand => winit::window::CursorIcon::Pointer,
                 Cursor::NotAllowed => winit::window::CursorIcon::NotAllowed,
             });
         }
-        self.cursor_icon = wanted;
+        self.cursor_icon = effective;
     }
     /// LevelLoadingScreen.onClose -> Gui.setScreen(null) -> grabMouse.
     fn capture_loaded_world(&mut self) {
@@ -6101,7 +6144,14 @@ impl Game<'_> {
         // Screen.extractBlurredBackground blurs the world and HUD, while the
         // screen's background, widgets, toasts and debug overlay stay sharp.
         batch.blur_at = batch.vertices.len() as u32;
-        match self.screen {
+        // PackConfirmScreen takes the open screen's place (it comes back once
+        // the prompt is answered): the screen under the prompt isn't drawn.
+        let screen = if self.server_packs.prompt.is_some() {
+            Screen::Playing
+        } else {
+            self.screen
+        };
+        match screen {
             Screen::Paused if self.pause_menu => self.draw_pause_menu(&mut batch),
             // PauseScreen(false): only its title, at the top.
             Screen::Paused => {
@@ -6141,9 +6191,11 @@ impl Game<'_> {
         // ToastManager.extractRenderState: F1 hides the toasts too.
         self.draw_toasts(&mut batch, !show_hud);
         self.draw_pack_toasts(&mut batch, !show_hud);
-        self.remote_hud(&mut batch);
-        self.draw_sign_editor(&mut batch);
-        self.draw_book(&mut batch);
+        if self.server_packs.prompt.is_none() {
+            self.remote_hud(&mut batch);
+            self.draw_sign_editor(&mut batch);
+            self.draw_book(&mut batch);
+        }
         batch
     }
     fn creative_inventory_open(&self) -> bool {
@@ -6611,9 +6663,12 @@ impl Game<'_> {
         let catalog = self.res.items();
         let max = |s: &ItemStack| catalog.get(&s.item).map_or(64, |i| i.max_stack);
         match click_display(&mut self.carried, shown, max, button, input) {
-            DisplayClick::Hotbar(i, stack) => self.inventory[i] = Some(stack),
+            DisplayClick::Hotbar(i, stack) if i < self.inventory.len() => {
+                self.inventory[i] = Some(stack);
+            }
+            DisplayClick::Offhand(stack) => self.offhand = Some(stack),
             DisplayClick::Drop(stack) => self.player_drop(stack),
-            DisplayClick::Nothing => {}
+            _ => {}
         }
     }
     /// Several clicks on one menu instance (a quick craft drag is three).
@@ -10456,14 +10511,18 @@ impl Game<'_> {
                 if hand == Hand::Off {
                     continue;
                 }
-                let Some(arm) = self.res.player_arm().clone() else {
+                let slim = self.player_model.as_ref().is_some_and(|m| m.slim);
+                let Some(arm) = self.res.player_arm(slim).clone() else {
                     continue;
                 };
+                // The player's own skin, as the inventory's model shows it.
+                let sprites = &self.gui.atlas.sprites;
                 let Some(r) = self
-                    .gui
-                    .atlas
-                    .sprites
-                    .get("entity/player/wide/steve")
+                    .player_model
+                    .as_ref()
+                    .and_then(|m| m.skin.as_deref())
+                    .and_then(|skin| sprites.get(skin))
+                    .or_else(|| sprites.get("entity/player/wide/steve"))
                     .copied()
                 else {
                     continue;
@@ -11659,6 +11718,11 @@ impl Game<'_> {
         } else {
             self.bob_matrix(camera_alpha as f32)
         };
+        let spin = if title {
+            glam::Mat4::IDENTITY
+        } else {
+            self.spinning_matrix(camera_alpha as f32)
+        };
         let terrain_distance = self.terrain_distance();
         let distance = (terrain_distance * 16) as f32;
         let depth_far =
@@ -11666,7 +11730,7 @@ impl Game<'_> {
         self.view_frustum = self
             .renderer
             .as_ref()
-            .map(|r| r.camera_frustum(fov_degrees, yaw, pitch, bob, depth_far));
+            .map(|r| r.camera_frustum(fov_degrees, yaw, pitch, bob * spin, depth_far));
         // Keep the buffer local while builders need mutable access to the game.
         let mut entities = std::mem::take(&mut self.entity_vertices);
         entities.clear();
@@ -11749,12 +11813,24 @@ impl Game<'_> {
             pitch,
             fov_degrees,
             bob,
+            spin,
             sky,
             distance,
             detail_distance: (self.streaming.radius * 16) as f32,
             depth_far,
             underwater,
             title,
+            sky_blocked: self.potions.effects.get("blindness").is_some()
+                || self.potions.effects.get("darkness").is_some()
+                || matches!(
+                    horizon_client::fog::fog_type(
+                        &self.world,
+                        self.res.facts(),
+                        [camera.x, camera.y, camera.z],
+                        self.forward(),
+                    ),
+                    horizon_client::fog::FogType::Lava | horizon_client::fog::FogType::PowderSnow
+                ),
             skybox: self.dim == Dim::Overworld && self.settings.horizon.sky,
             end_sky: self.dim == Dim::End && self.settings.horizon.sky,
             end_sky_sprite: self
@@ -12067,11 +12143,12 @@ impl Game<'_> {
                 Screen::Playing => {
                     // key.inventory while riding a tamed mount opens its inventory.
                     if !self.open_ridden_mount_menu() {
-                        self.screen = if self.creative {
-                            Screen::Creative
+                        if self.creative {
+                            self.screen = Screen::Creative;
+                            self.creative_screen.reopen();
                         } else {
-                            Screen::Inventory
-                        };
+                            self.screen = Screen::Inventory;
+                        }
                         self.capture(false);
                     }
                 }
@@ -12651,13 +12728,16 @@ impl ApplicationHandler for Game<'_> {
                         self.left = false;
                         self.right = false;
                         self.capture(false);
-                        // Screens (books, signs) stay open instead of pausing.
+                        // Gui.setPauseScreen: an open screen (books, signs, the
+                        // pack prompt, a server dialog) stays instead of pausing.
                         if self.screen == Screen::Playing
                             && self.player.is_some()
                             && !self.options.no_pause
                             && self.settings.file.bool("pauseOnLostFocus")
                             && self.book.is_none()
                             && self.sign_edit.is_none()
+                            && self.server_packs.prompt.is_none()
+                            && !self.dialog_open()
                         {
                             self.screen = Screen::Paused;
                         }
@@ -14511,6 +14591,8 @@ fn load_world_rest(
         player_type: perspective::player_type(root),
         player_arm: horizon_client::mobs::load_model(root, "minecraft:player#main")
             .and_then(|m| m.children.into_iter().find(|c| c.name == "right_arm")),
+        player_arm_slim: horizon_client::mobs::load_model(root, "minecraft:player_slim#main")
+            .and_then(|m| m.children.into_iter().find(|c| c.name == "right_arm")),
         spin_attack: horizon_client::mobs::load_model(root, "minecraft:spin_attack#main"),
     })
 }
@@ -14648,6 +14730,7 @@ fn loading_frame(hud: &HudBatch) -> Frame<'_> {
         pitch: 10.0,
         fov_degrees: 85.0,
         bob: glam::Mat4::IDENTITY,
+        spin: glam::Mat4::IDENTITY,
         sky: horizon_client::environment::Sky::default(),
         distance: 12.0,
         detail_distance: 12.0,
@@ -14655,6 +14738,7 @@ fn loading_frame(hud: &HudBatch) -> Frame<'_> {
         underwater: false,
         cave_culling: false,
         title: true,
+        sky_blocked: false,
         skybox: false,
         end_sky: false,
         end_sky_sprite: None,

crates/horizon-client/src/game/advancements.rs

@@ -993,6 +993,42 @@ impl Game<'_> {
             block_ok && state_ok && adv::conditions(&c["player"], &pctx, w)
         });
     }
+    /// `SlideDownBlockTrigger`: match the actual block and its state.
+    pub(super) fn trigger_honey_slide(&mut self, pos: [i32; 3]) {
+        let me = self.player_entity();
+        self.trigger("minecraft:slide_down_block", move |c, w| {
+            let ctx = adv::Entities {
+                this: Some(&me),
+                origin: me.position,
+                tool: None,
+                block_pos: None,
+            };
+            adv::conditions(&c["player"], &ctx, w) && adv::block(c, pos, w)
+        });
+    }
+
+    /// `TargetBlockTrigger`: signal and projectile conditions are evaluated in
+    /// the shooter's context, including distance from the shooter.
+    pub(super) fn trigger_target_hit(&mut self, projectile: &EntityView, strength: i32) {
+        let me = self.player_entity();
+        let projectile = projectile.clone();
+        self.trigger("minecraft:target_hit", move |c, w| {
+            let player = adv::Entities {
+                this: Some(&me),
+                origin: me.position,
+                tool: None,
+                block_pos: None,
+            };
+            let target = adv::Entities {
+                this: Some(&projectile),
+                ..player
+            };
+            adv::conditions(&c["player"], &player, w)
+                && adv::range_i(&c["signal_strength"], i64::from(strength))
+                && adv::conditions(&c["projectile"], &target, w)
+        });
+    }
+
     /// `ItemUsedOnLocationTrigger` (placed_block, item_used_on_block).
     pub(super) fn trigger_block(&mut self, name: &str, pos: [i32; 3], stack: &ItemStack) {
         let me = self.player_entity();

crates/horizon-client/src/game/beacon.rs

@@ -563,13 +563,21 @@ impl Game<'_> {
         };
         let time = (self.world.game_time.rem_euclid(40)) as f32 + alpha as f32;
         let scoping = self.scoping();
+        let view = f64::from(self.settings.render_distance * 16);
         for (k, e) in &self.world.block_entities {
             let BlockEntity::Beacon(b) = e else { continue };
+            // `getBeamSections` is empty while Levels is 0.
             if b.levels == 0 || b.sections.is_empty() {
                 continue;
             }
             let base = glam::DVec3::new(f64::from(k.0) + 0.5, f64::from(k.1), f64::from(k.2) + 0.5);
-            let distance = (base - camera).truncate().length() as f32;
+            // `BeaconRenderer.shouldRender`: horizontal distance under render distance × 16.
+            let offset = base - camera;
+            let horizontal = glam::DVec2::new(offset.x, offset.z).length();
+            if horizontal >= view {
+                continue;
+            }
+            let distance = horizontal as f32;
             let scale = if scoping {
                 1.0
             } else {

crates/horizon-client/src/game/block_entity_ticks.rs

@@ -9,6 +9,7 @@ use horizon_client::{
     Result,
     block_entities::{Pos, Ticking},
     containers::{BlockEntity, FurnaceKind, HOPPER_SLOTS},
+    furnace::FurnaceCooking,
 };
 use horizon_core::position::BlockPos;
 use horizon_world::registry::BlockStateId;

crates/horizon-client/src/game/books.rs

@@ -76,9 +76,11 @@ fn view_pages(data: Option<&StackData>) -> Vec<Text> {
         .iter()
         .enumerate()
         .map(|(i, page)| match tagged.then(|| &w.page_tags[i]) {
-            Some(tag @ horizon_world::nbt::Tag::Compound(_)) => {
-                horizon_client::entity_nbt::name_text(tag)
-            }
+            // A component object, or a component list (`ComponentSerialization`
+            // takes both; servers behind ViaVersion send the list form).
+            Some(
+                tag @ (horizon_world::nbt::Tag::Compound(_) | horizon_world::nbt::Tag::List(_)),
+            ) => horizon_client::entity_nbt::name_text(tag),
             _ => Text::literal(page),
         })
         .collect()
@@ -137,6 +139,18 @@ impl Game<'_> {
                 }
             }
             ClickEvent::OpenUrl(url) => self.click_url(url),
+            ClickEvent::RunCommand(command) => self.click_command(&command),
+            ClickEvent::SuggestCommand(command) => {
+                // defaultHandleClickEvent: the chat screen takes it over.
+                if self.player.is_some() {
+                    self.close_book();
+                    self.open_chat(&command);
+                }
+            }
+            ClickEvent::CopyToClipboard(value) => {
+                use horizon_client::clipboard::Clipboard;
+                self.clipboard.set(&value);
+            }
             _ => {}
         }
     }

crates/horizon-client/src/game/chat.rs

@@ -859,7 +859,7 @@ impl Game<'_> {
     /// first, as `ClientPacketListener.sendUnattendedCommand` lets client
     /// commands take it. (Vanilla asks first when the command fails to
     /// parse; here the server answers it.)
-    fn click_command(&mut self, command: &str) {
+    pub(super) fn click_command(&mut self, command: &str) {
         let command = command.strip_prefix('/').unwrap_or(command);
         if self.mod_command(command) {
             return;

crates/horizon-client/src/game/commands/pregen.rs

@@ -227,7 +227,7 @@ impl Game<'_> {
     }
 
     /// Whether the level in place has a running task, which the server pumps
-    /// between its ticks (`pump_pregen`).
+    /// between its ticks (`pump_chunks`).
     pub(in crate::game) fn pregen_runs_here(&self) -> bool {
         self.cmds
             .pregen
@@ -243,11 +243,19 @@ impl Game<'_> {
     /// Keep the workers fed until `until`: collect what they finished and
     /// hand them the next jobs as soon as each one is done, rather than once
     /// a tick.
-    pub(in crate::game) fn pump_pregen(&mut self, until: Instant) {
+    pub(in crate::game) fn pump_chunks(&mut self, until: Instant, paused: bool) {
         // Force-loaded chunks too: decorating in vanilla's order, a chunk
         // waits for its neighbours far more often than once a tick allows.
+        // And the players' chunks while they load, as vanilla's server runs
+        // its chunk tasks while it waits for the next tick
+        // (`MinecraftServer.waitUntilNextTick`): once a tick, a few jobs per
+        // worker (`schedule_generation`) capped joining a world at about 120
+        // columns a second with two workers, the workers idle most of the
+        // time. Not while a respawn search waits for a chunk: its area is
+        // only asked for by the tick's own `update_world`.
+        let players = !paused && self.spawn_wait.is_empty();
         while self.pregen_runs_here()
-            || (!self.streaming.forced.is_empty() && self.streaming.busy())
+            || ((players || !self.streaming.forced.is_empty()) && self.streaming.busy())
         {
             let now = Instant::now();
             if now >= until {

crates/horizon-client/src/game/creatures.rs

@@ -2666,10 +2666,25 @@ impl Game<'_> {
         let hit = self.with_level(|b, level, ticks| {
             b.target_projectile_hit(level, ticks, block, location, face, arrow)
         });
-        if hit.is_some() {
+        if let Some(strength) = hit {
             let _ = self.process_level_events();
-            if p.owner == Some(Who::Player) {
+            if p.owner == Some(Who::Player) && (p.guest.is_none() || p.guest == self.lan_acting) {
                 self.stats.custom("target_hit", 1);
+                let kind = if p
+                    .arrow
+                    .as_ref()
+                    .is_some_and(|a| &*a.pickup_item.item == "minecraft:spectral_arrow")
+                {
+                    "minecraft:spectral_arrow"
+                } else {
+                    p.kind.id()
+                };
+                let projectile = horizon_client::advancements::EntityView {
+                    kind: kind.to_owned(),
+                    position: [p.position.x, p.position.y, p.position.z],
+                    ..Default::default()
+                };
+                self.trigger_target_hit(&projectile, strength);
             }
         }
     }

crates/horizon-client/src/game/fov.rs

@@ -1,11 +1,13 @@
 //! Field of view (`Camera.tickFov`, `calculateFov`,
 //! `AbstractClientPlayer.getFieldOfViewModifier`), view and hurt bobbing
-//! (`GameRenderer.bobHurt`, `bobView`) and the spyglass (`SpyglassItem`,
+//! (`GameRenderer.bobHurt`, `bobView`), the portal and Nausea spin
+//! (`GameRenderer.renderLevel`) and the spyglass (`SpyglassItem`,
 //! `Hud.extractSpyglassOverlay`). The arithmetic is `horizon_client::camera`.
 use super::Game;
 use horizon_client::{
     camera::{
         BobState, CameraFluid, FovPlayer, HurtBob, UseItem, bob_matrix, field_of_view_modifier,
+        spinning_effect_matrix,
     },
     fog::{FogType, fog_type},
     hud::HudBatch,
@@ -26,6 +28,28 @@ impl Game<'_> {
     pub(super) fn fov_effect_scale(&self) -> f32 {
         self.settings.file.double("fovEffectScale") as f32
     }
+    /// `options.screenEffectScale` (Distortion Effects).
+    pub(super) fn screen_effect_scale(&self) -> f32 {
+        self.settings.file.double("screenEffectScale") as f32
+    }
+    /// `LocalPlayer.getEffectBlendFactor(NAUSEA, partial)`: 0 without the effect.
+    pub(super) fn nausea_blend(&self, partial: f32) -> f32 {
+        if self.potions.effects.get("nausea").is_none() {
+            return 0.0;
+        }
+        let fx = &self.screen_fx;
+        fx.o_nausea + partial * (fx.nausea - fx.o_nausea)
+    }
+    /// The spin `GameRenderer.renderLevel` multiplies into the level's
+    /// projection: the larger of the portal and Nausea intensities, scaled by
+    /// Distortion Effects squared, turning by `LocalPlayer.getSpinningEffectAngle`.
+    pub(super) fn spinning_matrix(&self, partial: f32) -> glam::Mat4 {
+        let fx = &self.screen_fx;
+        let portal = fx.o_portal + partial * (fx.portal - fx.o_portal);
+        let scale = self.screen_effect_scale();
+        let intensity = portal.max(self.nausea_blend(partial)) * (scale * scale);
+        spinning_effect_matrix(intensity, fx.spinning_time + partial * fx.spinning_speed)
+    }
     /// What `AbstractClientPlayer.getFieldOfViewModifier` reads.
     fn fov_player(&self) -> Option<FovPlayer> {
         let p = self.player.as_ref()?;

crates/horizon-client/src/game/frames.rs

@@ -429,7 +429,9 @@ impl Game<'_> {
             if let Some(id) = map {
                 // ItemFrameRenderer: the map fills the face, in 90-degree steps.
                 let depth = if f.invisible { 0.5 } else { 0.4375 };
-                let item_light = if f.glow { 240 | 240 << 8 } else { packed };
+                // A glow frame's map is 15728850 = 0xF000D2 (sky coordinate 240,
+                // block coordinate 210), not full bright.
+                let item_light = if f.glow { 240 | 210 << 8 } else { packed };
                 let m = pose
                     * glam::DMat4::from_translation(glam::DVec3::new(0.0, 0.0, depth))
                     * glam::DMat4::from_rotation_z(

crates/horizon-client/src/game/item_draw.rs

@@ -82,11 +82,11 @@ fn civil(days: i64) -> (i64, u32, u32) {
     (yoe + era * 400 + i64::from(m <= 2), m, d)
 }
 /// `DateTimeFormatter.ofPattern(pattern).format(now)` for the month, day,
-/// year and time letters item models use (UTC: no time zone database).
+/// year and time letters item models use, in the system time zone
+/// (`LocalTime` without a `time_zone`).
 pub(super) fn local_time(pattern: &str) -> String {
-    let secs = std::time::SystemTime::now()
-        .duration_since(std::time::UNIX_EPOCH)
-        .map_or(0, |d| d.as_secs() as i64);
+    let now = chrono::Local::now();
+    let secs = now.timestamp() + i64::from(now.offset().local_minus_utc());
     let (y, mo, d) = civil(secs.div_euclid(86_400));
     let s = secs.rem_euclid(86_400);
     let (h, mi, se) = (s / 3600, s / 60 % 60, s % 60);

crates/horizon-client/src/game/lan_actions.rs

@@ -2607,6 +2607,9 @@ impl Game<'_> {
             let _ = w.tick_environment_damage();
             let _ = w.apply_fire_contact();
             let _ = w.server_hazards_tick(in_wall);
+            // LivingEntity.aiStep: a Riptide spin counts down on the server's
+            // copy too, or it would stay in the spin pose (eye 0.4) for good.
+            w.player.count_down_server_spin();
             // Player.tick ends with updatePlayerPose: a swimmer, or a player
             // crawling under a block, takes the short box its moves are checked with.
             let _ = w.update_player_pose();
@@ -2706,8 +2709,15 @@ impl Game<'_> {
                 // others (Player.playSound excludes the player, whose client
                 // plays it), the entity event 53 everyone around.
                 MotionEvent::HoneySlide {
-                    sound, particles, ..
+                    pos,
+                    sound,
+                    particles,
                 } => {
+                    if self.world.game_time % 20 == 0 {
+                        self.as_guest(host, conn, |game| {
+                            game.trigger_honey_slide([pos.x, pos.y, pos.z])
+                        });
+                    }
                     let Some((id, at)) = host.hub.guest(conn).map(|g| (g.entity_id, g.position))
                     else {
                         continue;

crates/horizon-client/src/game/lan_crafting.rs

@@ -7,6 +7,7 @@
 use super::{Game, lan::LanHost};
 use horizon_client::{
     containers::BlockEntity,
+    furnace::FurnaceCooking,
     items::ItemStack,
     lan::{guest::Guest, menu::Slots},
     menu::{Env, Input, Kind, Menu},

crates/horizon-client/src/game/levels.rs

@@ -408,9 +408,9 @@ impl Game<'_> {
         }
         *next += self.clock.tick_duration();
         if *next > now {
-            // A `/pregen` task or force-loaded chunks keep the workers fed
-            // until the next tick.
-            self.pump_pregen(*next);
+            // The chunks loading (the players', force-loaded ones, a
+            // `/pregen` task) keep the workers fed until the next tick.
+            self.pump_chunks(*next, paused);
             let now = Instant::now();
             if *next > now {
                 std::thread::sleep(*next - now);

crates/horizon-client/src/game/minecarts.rs

@@ -202,7 +202,7 @@ impl Minecart {
         self.velocity.x.hypot(self.velocity.z)
     }
     /// `AbstractContainerMenu.getRedstoneSignalFromContainer` of `slots`.
-    fn container_signal(slots: &[Option<ItemStack>], items: &Items) -> i32 {
+    pub(super) fn container_signal(slots: &[Option<ItemStack>], items: &Items) -> i32 {
         let mut total = 0.0f32;
         for s in slots.iter().flatten() {
             let max = items.get(&s.item).map_or(64, |i| i.max_stack).min(64);
@@ -1029,22 +1029,6 @@ impl Game<'_> {
         }
         best
     }
-    /// Each cart's kind and comparator signal, for the detector rail
-    /// (`DetectorRailBlock.getAnalogOutputSignal`). A cart whose menu is open
-    /// counts the items in that menu.
-    pub(super) fn cart_signals(&self) -> Vec<(CartKind, i32)> {
-        self.carts
-            .iter()
-            .map(|c| {
-                let key = (i32::MAX - 15, CART_KEY_Y, c.id as i32);
-                let slots = match self.world.block_entities.get(&key) {
-                    Some(BlockEntity::Chest(open)) => open,
-                    _ => &c.items,
-                };
-                (c.kind, Minecart::container_signal(slots, self.res.items()))
-            })
-            .collect()
-    }
     /// `interact`: ride, open, fuel or ignite the cart under the crosshair.
     pub(super) fn interact_cart(&mut self) -> bool {
         let Some((i, d)) = self.cart_hit() else {

crates/horizon-client/src/game/mod_recipes.rs

@@ -95,7 +95,9 @@ impl Game<'_> {
     /// Capability `recipes`'s tables and known displays for this tick's
     /// snapshot; nothing while no running mod reads them.
     pub(super) fn mod_recipes(&mut self) -> (Option<Arc<Recipes>>, Arc<[i32]>) {
-        if !self.mods.mods.wants_recipes() {
+        // The tables come from the world resources, which may still be
+        // loading behind the title on a slow start.
+        if !self.mods.mods.wants_recipes() || self.res.rest.get().is_none() {
             return (None, Arc::from([]));
         }
         if self.mods.recipes.is_none() {

crates/horizon-client/src/game/perspective.rs

@@ -158,7 +158,10 @@ pub(super) fn player_type(root: &Path) -> Option<Arc<MobType>> {
             ambient_interval: 80,
             flags: Default::default(),
             model: Arc::new(model),
-            layers: Default::default(),
+            // PlayerModel's slim arms, for slim skins.
+            layers: horizon_client::mobs::load_model(root, "minecraft:player_slim#main")
+                .map(|slim| [("player_slim#main".to_owned(), Arc::new(slim))].into())
+                .unwrap_or_default(),
             texture: "entity/player/wide/steve".into(),
             brain: Brain::Passive,
             anim: Anim::Humanoid { zombie_arms: false },

crates/horizon-client/src/game/remote.rs

@@ -213,7 +213,8 @@ pub(super) struct Remote {
     /// `LocalPlayer.showDeathScreen`: off with `immediate_respawn`.
     show_death_screen: bool,
     player_type: Option<Arc<MobType>>,
-    /// Inventory as last synchronised, for creative-mode slot updates.
+    /// Inventory (then the off hand) as last synchronised, for creative-mode
+    /// slot updates.
     synced: Vec<Option<ItemStack>>,
     decode_errors: u32,
     clock: Option<i32>,
@@ -510,7 +511,7 @@ impl Game<'_> {
             death_message: None,
             show_death_screen: true,
             player_type,
-            synced: vec![None; 36],
+            synced: vec![None; 37],
             decode_errors: 0,
             clock: None,
             clock_rate: 1.0,
@@ -699,7 +700,6 @@ impl Game<'_> {
             return;
         }
         let text = content.plain();
-        log::info!("[chat] {text}");
         // addServerSystemMessage and addClientSystemMessage both carry
         // GuiMessageTag.systemSinglePlayer: the grey bar at the line's left.
         let indicator = (source != horizon_client::chat::ChatSource::Player)
@@ -3086,6 +3086,20 @@ impl Game<'_> {
             .collect();
         Some((players, r.online_mode, upside_down))
     }
+    /// The signed-in account's `textures`, once the services answered.
+    fn own_textures(&self) -> Option<horizon_client::skins::Textures> {
+        use horizon_client::skins::{self, NameOrId, Resolve};
+        let auth = horizon_client::auth::current()?;
+        let state = self
+            .skin_profiles
+            .borrow_mut()
+            .state(&NameOrId::Id(auth.uuid));
+        let Resolve::Done(Some(profile)) = state else {
+            return None;
+        };
+        let (value, signature) = profile.textures()?;
+        Some(skins::unpack(&value, signature, &skins::TEXTURE_URIS))
+    }
     /// `PlayerInfo.getSkin` for every player entity, including NPCs that are
     /// never in the tab list: resolve each profile's textures and give the
     /// level's player models their skin.
@@ -3094,12 +3108,23 @@ impl Game<'_> {
             return;
         };
         let local = r.profile;
-        let entries: Vec<(u128, horizon_client::skins::Textures)> = r
+        let mut entries: Vec<(u128, horizon_client::skins::Textures)> = r
             .skin_textures
             .iter()
             .map(|(uuid, textures)| (*uuid, textures.clone()))
             .collect();
+        // Minecraft.profileFuture: the signed-in account's own profile, fetched from the
+        // services, gives the local player its skin where the server sends none (single
+        // player's offline-mode server).
+        if !entries.iter().any(|(u, t)| *u == local && t.skin.is_some())
+            && let Some(own) = self.own_textures()
+        {
+            entries.retain(|(u, _)| *u != local);
+            entries.push((local, own));
+        }
         let mut resolved: Vec<(u128, String)> = Vec::new();
+        // PlayerSkin.model of each resolved skin: the textures' `slim`.
+        let mut slim = std::collections::HashSet::new();
         for (uuid, textures) in entries {
             // PlayerInfo.createSkinLookup: only the local player's own skin
             // may be unsigned.
@@ -3110,10 +3135,22 @@ impl Game<'_> {
                 })
             };
             if let Some(skin) = skin {
+                if textures.slim {
+                    slim.insert(uuid);
+                }
                 resolved.push((uuid, skin));
             }
         }
         resolved.retain(|(_, skin)| !skin.starts_with("skins/") || self.again_skin(skin));
+        // PlayerInfo.getSkin: the downloaded skin and its model, else the
+        // profile's default skin (DefaultPlayerSkin.get), slim or wide.
+        let skin_of = |skins: &HashMap<u128, String>, uuid: u128| match skins.get(&uuid) {
+            Some(skin) => (skin.clone(), slim.contains(&uuid)),
+            None => {
+                let skin = horizon_client::tab_list::default_skin(uuid);
+                (skin.to_owned(), skin.contains("/slim/"))
+            }
+        };
         let Some((level, skins, own)) = self.remote.as_mut().map(|r| {
             r.skins = resolved.into_iter().collect();
             (
@@ -3122,27 +3159,26 @@ impl Game<'_> {
                     .map(|(id, uuid)| (*id as u32, *uuid))
                     .collect::<Vec<_>>(),
                 r.skins.clone(),
-                r.skins.get(&r.profile).cloned(),
+                r.profile,
             )
         }) else {
             return;
         };
         for (id, uuid) in level {
-            let Some(skin) = skins.get(&uuid) else {
-                continue;
-            };
+            let (skin, is_slim) = skin_of(&skins, uuid);
             if let Some(mob) = self
                 .mobs
                 .iter_mut()
                 .find(|m| m.id == id && &*m.kind.id == "minecraft:player")
             {
-                mob.skin = Some(skin.clone());
+                mob.skin = Some(skin);
+                mob.slim = is_slim;
             }
         }
-        if let Some(skin) = own
-            && let Some(mob) = self.player_model.as_mut()
-        {
+        if let Some(mob) = self.player_model.as_mut() {
+            let (skin, is_slim) = skin_of(&skins, own);
             mob.skin = Some(skin);
+            mob.slim = is_slim;
         }
         // ClientMannequin.updateSkin (PlayerSkinRenderCache.lookup): a
         // mannequin's DATA_PROFILE `textures` property resolves like a
@@ -3192,7 +3228,7 @@ impl Game<'_> {
                 (m.id, textures)
             })
             .collect();
-        let mut resolved: Vec<(u32, Option<String>)> = Vec::new();
+        let mut resolved: Vec<(u32, Option<String>, bool)> = Vec::new();
         for (id, textures) in mannequins {
             let skin = {
                 let mut downloads = self.skin_downloads.borrow_mut();
@@ -3200,15 +3236,17 @@ impl Game<'_> {
                     downloads.state(kind, url)
                 })
             };
-            resolved.push((id, skin));
+            let slim = skin.is_some() && textures.slim;
+            resolved.push((id, skin, slim));
         }
-        for (id, skin) in resolved {
+        for (id, skin, slim) in resolved {
             let skin = skin.filter(|s| !s.starts_with("skins/") || self.again_skin(s));
             if let Some(mob) = self
                 .mobs
                 .iter_mut()
                 .find(|m| m.id == id && &*m.kind.id == "minecraft:mannequin")
             {
+                mob.slim = slim && skin.is_some();
                 mob.skin = skin;
             }
         }
@@ -3592,6 +3630,7 @@ impl Game<'_> {
         self.sleep_timer = super::tick_sleep_timer(self.sleep_timer, self.sleeping.is_some());
         // Gui.tick: the titles, the action bar and the held item's name.
         self.tick_hud();
+        self.tick_subtitles();
         let entity_collisions = self.player_entity_collisions();
         let pushed = self.remote_pushes();
         let Some(player) = self.player.as_mut() else {
@@ -4307,12 +4346,14 @@ impl Game<'_> {
         {
             out.push(packet);
         }
-        // Creative inventory edits are sent slot by slot (SetCreativeModeSlot).
+        // Creative inventory edits are sent slot by slot (SetCreativeModeSlot);
+        // `synced[36]` is the off hand.
         let mut creative_slots = Vec::new();
         if self.creative {
-            for i in 0..36 {
-                if self.inventory[i] != r.synced[i] {
-                    r.synced[i] = self.inventory[i].clone();
+            for i in 0..37 {
+                let stack = self.inventory.get(i).unwrap_or(&self.offhand);
+                if *stack != r.synced[i] {
+                    r.synced[i] = stack.clone();
                     creative_slots.push(i);
                 }
             }
@@ -4321,8 +4362,13 @@ impl Game<'_> {
             self.send(packet);
         }
         for i in creative_slots {
-            let slot = if i < 9 { 36 + i } else { i } as i16;
-            let item = self.to_network(&self.inventory[i]);
+            // InventoryMenu's slots: the hotbar is 36..=44, the off hand 45.
+            let slot = match i {
+                0..9 => 36 + i,
+                36 => 45,
+                _ => i,
+            } as i16;
+            let item = self.to_network(self.inventory.get(i).unwrap_or(&self.offhand));
             self.send(S::SetCreativeModeSlot(play::SetCreativeModeSlot {
                 slot,
                 item,
@@ -4331,7 +4377,8 @@ impl Game<'_> {
     }
     /// Inventory as the server last described it.
     fn remote_synced(&mut self) {
-        let inventory = self.inventory.clone();
+        let mut inventory = self.inventory.clone();
+        inventory.push(self.offhand.clone());
         if let Some(r) = self.remote.as_mut() {
             r.synced = inventory;
         }
@@ -5055,8 +5102,11 @@ impl Game<'_> {
         // countdown goes on past zero (LivingEntity.updateUsingItem completes
         // only on the server) until the server's USE_ITEM_COMPLETE.
         let remaining = consumable.ticks() - ticks as i32;
-        if consumable.particles && consumable.should_emit(remaining) {
-            self.eat_particles(&stack, 5);
+        if consumable.should_emit(remaining) {
+            // `emit_consume` plays the eat sound and spawns the bites (when the
+            // item has consume particles), as `tick_used_item` does on the
+            // player's own server.
+            self.emit_consume(&consumable, &stack, 5);
         }
         self.using = Some((slot, ticks + 1));
     }
@@ -5337,11 +5387,12 @@ impl Game<'_> {
             KeyCode::KeyE => {
                 // The inventory opens without telling the server.
                 self.recipe_ui.reset_screen();
-                self.screen = if self.creative {
-                    Screen::Creative
+                if self.creative {
+                    self.screen = Screen::Creative;
+                    self.creative_screen.reopen();
                 } else {
-                    Screen::Inventory
-                };
+                    self.screen = Screen::Inventory;
+                }
                 self.craft_size = 2;
                 self.capture(false);
                 Ok(true)

crates/horizon-client/src/game/render_tick.rs

@@ -108,7 +108,11 @@ impl Game<'_> {
                 rain,
                 thunder,
                 skybox: self.dim == Dim::Overworld,
-                blindness: None,
+                blindness: self
+                    .potions
+                    .effects
+                    .get("blindness")
+                    .map(|effect| (effect.duration, effect.duration == -1)),
                 darkness: self.darkness_fog(),
                 darken_world: self
                     .boss_overlay
@@ -140,7 +144,8 @@ impl Game<'_> {
         } else {
             63.0
         };
-        camera.y < horizon
+        self.dim == Dim::Overworld
+            && camera.y < horizon
             && fog_type(
                 &self.world,
                 self.res.facts(),
@@ -209,8 +214,8 @@ impl Game<'_> {
             percent_frozen: p.percent_frozen(),
             partial,
             portal: [fx.o_portal, fx.portal],
-            nausea: 0.0,
-            screen_effect_scale: 1.0,
+            nausea: self.nausea_blend(partial),
+            screen_effect_scale: self.screen_effect_scale(),
         };
         let mut scope = self.scope_scale;
         let gui_overlays =
@@ -247,6 +252,12 @@ impl Game<'_> {
             let brightness = self.eye_brightness(e);
             let inside_portal = self.client_portal_effect();
             self.screen_fx.tick(brightness, inside_portal);
+            let nausea = self
+                .potions
+                .effects
+                .get("nausea")
+                .map(|e| !e.ends_within(60));
+            self.screen_fx.tick_spinning(nausea);
             // LocalPlayer water vision and AtmosphericFogEnvironment rain fog.
             let in_water =
                 fog_type(&self.world, self.res.facts(), e, self.forward()) == FogType::Water;

crates/horizon-client/src/game/server_packs.rs

@@ -269,6 +269,8 @@ impl Game<'_> {
         open.requests.push((p.id, p.url, p.hash));
         open.required = p.required;
         open.prompt = text;
+        // Gui.setScreen: KeyMapping.releaseAll, so no walking behind the prompt.
+        self.keys.clear();
         self.capture(false);
     }
     /// `handleResourcePackPop`: one pack, or all of them.

crates/horizon-client/src/game/spawner.rs

@@ -10,6 +10,7 @@ use horizon_client::{
         Mob, Who,
         spawner::{Spawner, SpawnerAdded, SpawnerEvent, SpawnerSpawn},
         spawning,
+        trial_spawner::TrialState,
     },
     particles::{ParticleOptions, ParticleType},
 };
@@ -373,12 +374,11 @@ impl Game<'_> {
     /// clicked block has no spawner.
     pub(super) fn use_spawn_egg_on_spawner(&mut self, pos: [i32; 3], kind: &str) -> Option<bool> {
         let key = (pos[0], pos[1], pos[2]);
-        if !matches!(
-            self.world.block_entities.get(&key),
-            Some(BlockEntity::Spawner(_))
-        ) {
-            return None;
-        }
+        let trial = match self.world.block_entities.get(&key) {
+            Some(BlockEntity::Spawner(_)) => false,
+            Some(BlockEntity::TrialSpawner(_)) => true,
+            _ => return None,
+        };
         if !self.ui.rules.bool("spawner_blocks_work") {
             self.system_message(horizon_client::text::Text::translate(
                 "advMode.notEnabled.spawner",
@@ -386,16 +386,26 @@ impl Game<'_> {
             ));
             return Some(false);
         }
-        let mut events = Vec::new();
-        let mut random = std::mem::replace(
-            &mut self.world.random,
-            horizon_core::random::LegacyRandom::new(0),
-        );
-        if let Some(BlockEntity::Spawner(s)) = self.world.block_entities.get_mut(&key) {
-            s.set_entity_id(kind, &mut random, &mut events);
+        if trial {
+            // TrialSpawnerBlockEntity.setEntityId: overrideEntityToSpawn, which
+            // ends in setState(INACTIVE).
+            if let Some(BlockEntity::TrialSpawner(t)) = self.world.block_entities.get_mut(&key) {
+                t.override_entity(kind);
+            }
+            let ominous = self.trial_spawner_block(key).is_some_and(|(_, o)| o);
+            let _ = self.set_trial_spawner_state(key, TrialState::Inactive, ominous);
+        } else {
+            let mut events = Vec::new();
+            let mut random = std::mem::replace(
+                &mut self.world.random,
+                horizon_core::random::LegacyRandom::new(0),
+            );
+            if let Some(BlockEntity::Spawner(s)) = self.world.block_entities.get_mut(&key) {
+                s.set_entity_id(kind, &mut random, &mut events);
+            }
+            self.world.random = random;
+            let _ = self.apply_spawner_events(key, events, &HashMap::new());
         }
-        self.world.random = random;
-        let _ = self.apply_spawner_events(key, events, &HashMap::new());
         // sendBlockUpdated(3) and the player's block_change game event.
         self.spawner_block_updated(key);
         self.post_block_game_event("minecraft:block_change", pos, Some(Who::Player), None);

crates/horizon-client/src/game/spill.rs

@@ -7,6 +7,7 @@ use super::{Game, GameLevel, Screen, dispenser::new_item_motion, storage::is_shu
 use horizon_client::{
     block_entity_item, block_entity_nbt,
     containers::{Banner, BlockEntity},
+    furnace::FurnaceCooking,
     item_data,
     items::ItemStack,
     save,

crates/horizon-client/src/game/stations.rs

@@ -2059,9 +2059,16 @@ impl Game<'_> {
                 );
             }
         }
-        // ItemStack.OP_NBT_WARNING, for a player with game master permission.
-        if !nested && self.ui.registries.permission >= 2 && block_entity_item::op_warning(stack) {
-            for (key, fallback) in [
+        // ItemStack.OP_NBT_WARNING: `BlockItem` and `SpawnEggItem`
+        // `.shouldPrintOpWarning` for a player with game master permission;
+        // a nested projectile has no player. The first line is bold.
+        if !nested
+            && self.ui.registries.permission >= 2
+            && (item_info.is_some_and(|i| i.block.is_some())
+                && block_entity_item::op_warning(stack)
+                || block_entity_item::spawn_egg_op_warning(stack))
+        {
+            for (i, (key, fallback)) in [
                 ("item.op_warning.line1", "Warning:"),
                 (
                     "item.op_warning.line2",
@@ -2071,12 +2078,15 @@ impl Game<'_> {
                     "item.op_warning.line3",
                     "Do not use unless you know the exact contents!",
                 ),
-            ] {
-                push(
-                    &mut lines,
-                    self.translate(key, fallback),
+            ]
+            .into_iter()
+            .enumerate()
+            {
+                let text = horizon_client::text::Text::legacy(&self.translate(key, fallback));
+                lines.push((
+                    if i == 0 { text.bold() } else { text },
                     rgba(255, 85, 85, 255),
-                );
+                ));
             }
         }
         lines

crates/horizon-client/src/game/trial_spawner.rs

@@ -272,7 +272,7 @@ impl Game<'_> {
         Ok(())
     }
     /// `setState` (and `removeOminous`): the block's state and ominous flag.
-    fn set_trial_spawner_state(
+    pub(super) fn set_trial_spawner_state(
         &mut self,
         key: Pos,
         state: TrialState,

crates/horizon-client/src/gfx.rs

@@ -105,12 +105,9 @@ const COMPLETE_COLUMN: u32 = (1 << (crate::chunk::HEIGHT / 16)) - 1;
 /// its fixed-point UVs (`terrain.wgsl`'s `terrain_uv`).
 /// The world pass again after occlusion culling's test: it loads both
 /// targets (phase 2 draws over phase 1, reading the test's results).
-/// LevelRenderer: no sky inside lava or powder snow (sky fog ends within 2 blocks).
+/// `LevelRenderer.addSkyPass`: fluids and camera effects block the sky pass.
 fn sky_open(frame: &Frame) -> bool {
-    match frame.fog {
-        Some(f) => f.sky_end > 2.0,
-        None => !frame.underwater,
-    }
+    !frame.sky_blocked
 }
 
 /// The Overworld-style sky (disc, sunset, stars, void) draws this frame.
@@ -222,6 +219,9 @@ pub struct Frame<'a> {
     /// The `GameRenderer.bobHurt`/`bobView` pose multiplied into the
     /// projection (`crate::camera::bob_matrix`).
     pub bob: Mat4,
+    /// The spinning effect multiplied into the level's projection only
+    /// (`crate::camera::spinning_effect_matrix`), not the hand's.
+    pub spin: Mat4,
     pub sky: Sky,
     /// Render distance in blocks (fog end).
     pub distance: f32,
@@ -235,6 +235,8 @@ pub struct Frame<'a> {
     pub cave_culling: bool,
     /// Title screen: only the dedicated panorama cube map and the HUD.
     pub title: bool,
+    /// Lava, powder snow, blindness or darkness blocks the sky pass.
+    pub sky_blocked: bool,
     /// Dimensions without a skybox (the Nether) clear to the fog colour.
     pub skybox: bool,
     /// The End: clear to black and draw the resident sky box behind the world.
@@ -3418,7 +3420,7 @@ impl Renderer {
             frame.fov_degrees,
             frame.yaw,
             frame.pitch,
-            frame.bob,
+            frame.bob * frame.spin,
             frame.depth_far,
         )
     }
@@ -4508,7 +4510,7 @@ impl Renderer {
             cull.bind_depth(&self.device, world_depth);
         }
         let cull = self.cull.as_ref().filter(|_| culling && solid_draws > 0);
-        let clear = if frame.title || (frame.end_sky && !frame.underwater) {
+        let clear = if frame.title || (frame.end_sky && !frame.underwater && sky_open(frame)) {
             wgpu::Color::BLACK
         } else {
             wgpu::Color {

crates/horizon-client/src/gfx/native_post.rs

@@ -361,8 +361,9 @@ impl NativePost {
 pub fn frame_inputs(frame: &Frame, size: [u32; 2], seconds: f32, index: u32) -> FrameInputs {
     let aspect = size[0] as f32 / size[1].max(1) as f32;
     let view = crate::camera::view_matrix(frame.yaw, frame.pitch);
-    let projection =
-        super::world_projection(frame.fov_degrees, aspect, frame.depth_far) * frame.bob;
+    let projection = super::world_projection(frame.fov_degrees, aspect, frame.depth_far)
+        * frame.bob
+        * frame.spin;
     // A celestial body's direction at `angle` degrees (SkyRenderer: Y -90°, then X by the
     // angle, of straight up): overhead at 0, rising in the east (+x).
     let body = |angle: f32| {

crates/horizon-client/src/gfx/pack_uniforms.rs

@@ -287,7 +287,8 @@ impl FrameUniforms {
             aspect,
             0.05,
             frame.depth_far,
-        ) * frame.bob;
+        ) * frame.bob
+            * frame.spin;
         let camera = frame.camera.as_vec3();
         let (previous_camera, previous_view, previous_projection) =
             self.previous

crates/horizon-client/src/lib.rs

@@ -31,7 +31,6 @@ pub mod cauldron;
 pub mod chat;
 pub mod chunk;
 pub mod chunk_map;
-pub mod clipboard;
 pub mod clock;
 pub mod clouds;
 pub mod collisions;
@@ -70,9 +69,9 @@ pub mod flatgen;
 pub mod fog;
 pub mod font;
 pub mod friends_screen;
+pub mod furnace;
 pub mod game_mode_switcher;
 pub mod game_rules_screen;
-pub mod gamepad;
 pub mod gfx;
 pub mod gizmos;
 pub mod gossip;
@@ -86,17 +85,12 @@ pub mod hud;
 pub mod hud_layout;
 pub mod hud_overlays;
 pub mod hunger;
-pub mod input;
-pub mod interaction_input;
 pub mod inv_sort;
 pub mod inventory_effects;
 pub mod item_render;
 pub mod item_sync;
 pub mod item_tooltip;
 pub mod java_text;
-pub mod key_names;
-pub mod keybinds;
-pub mod keymapping;
 pub mod lan;
 pub mod landing;
 pub mod level_loading;
@@ -116,7 +110,6 @@ pub mod mod_list;
 mod model_library;
 pub mod models;
 pub mod motion;
-pub mod mouse;
 pub mod moved_extras;
 pub mod multiplayer;
 pub mod music;
@@ -141,6 +134,7 @@ pub mod portal_sections;
 pub mod pose;
 pub mod pregen;
 pub mod projectiles;
+pub mod providers;
 pub mod raid;
 pub mod random_tick_sections;
 pub mod recipe_book;
@@ -187,7 +181,6 @@ pub mod vault;
 pub mod weather;
 pub mod widgets;
 pub mod win_screen;
-pub mod window;
 pub mod world;
 pub mod world_spawn;
 pub mod worldborder;
@@ -203,6 +196,15 @@ pub use horizon_client_core::nbt_path;
 pub use horizon_client_core::scoreboard;
 pub use horizon_client_core::snbt;
 pub use horizon_client_core::text;
+pub use horizon_client_input::clipboard;
+pub use horizon_client_input::gamepad;
+pub use horizon_client_input::input;
+pub use horizon_client_input::interaction_input;
+pub use horizon_client_input::key_names;
+pub use horizon_client_input::keybinds;
+pub use horizon_client_input::keymapping;
+pub use horizon_client_input::mouse;
+pub use horizon_client_input::window;
 pub use horizon_command as command;
 pub use horizon_items::blocks;
 pub use horizon_items::bundle;

crates/horizon-client/src/mobs.rs

@@ -937,6 +937,8 @@ pub struct Mob {
     /// The skin texture of a player mob (`PlayerInfo.getSkin`), which
     /// replaces the type's default when its download is ready.
     pub skin: Option<String>,
+    /// `PlayerSkin.model` is `SLIM`: the player model with 3-pixel arms.
+    pub slim: bool,
     /// A mannequin's `DATA_PROFILE` (ResolvableProfile): the profile's
     /// `textures` property resolves to `skin` like a player's.
     pub profile: Option<horizon_protocol::entity_data::Profile>,
@@ -1908,6 +1910,7 @@ impl Mob {
             rider: None,
             outbox: Vec::new(),
             skin: None,
+            slim: false,
             profile: None,
             attrs: Attrs {
                 speed: kind.speed,

crates/horizon-client/src/mobs/armadillo.rs

@@ -405,3 +405,43 @@ impl Goal for Rolled {
         scared(m)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::mobs::sensor_scan_tests::kind;
+    use std::sync::Arc;
+
+    /// An armadillo on the ground.
+    fn armadillo() -> Mob {
+        let mut kind = kind();
+        let k = Arc::make_mut(&mut kind);
+        k.id = "minecraft:armadillo".into();
+        k.species = Species::Armadillo;
+        let mut m = Mob::new(1, kind, Vec3::ZERO, 0.0);
+        m.on_ground = true;
+        m
+    }
+
+    #[test]
+    fn a_hit_rolls_it_up_into_a_ball() {
+        // Armadillo.actuallyHurt: a hit by a living thing curls it up and
+        // keeps the danger in mind for 80 ticks, so the model shows the
+        // shell instead of the armadillo (#2759).
+        let mut m = armadillo();
+        after_hurt(&mut m, &Damage::player([0.0, 0.0, 0.0]));
+        assert_eq!(state(&m), ROLLING);
+        // Armadillo.rollUp: the roll sound.
+        assert!(
+            m.outbox
+                .iter()
+                .any(|e| matches!(e, MobEvent::Sound(s, ..) if *s == "entity.armadillo.roll")),
+            "the roll plays its sound"
+        );
+        // ArmadilloState.shouldHideInShell: the shell shows after five ticks.
+        for _ in 0..6 {
+            tick(&mut m);
+        }
+        assert!(hiding_in_shell(&m), "the model shows the shell");
+    }
+}

crates/horizon-client/src/mobs/render.rs

@@ -115,8 +115,9 @@ pub fn body(m: &Mob) -> (String, String) {
         }
     };
     if avatar(m) {
+        // AvatarRenderer: PlayerModel's slim layer for a slim skin.
         return (
-            "main".into(),
+            if m.slim { "player_slim#main" } else { "main" }.into(),
             m.skin.clone().unwrap_or_else(|| m.kind.texture.clone()),
         );
     }
@@ -784,7 +785,8 @@ pub fn layers(m: &Mob) -> Vec<Layer> {
 /// `HumanoidArmorLayer`: the armour models of the mob's main model with the
 /// equipment textures (leather tinted, with its overlay).
 fn humanoid_armor(m: &Mob, v: &mut Vec<Layer>) {
-    if super::equine::is_equine(m.species()) {
+    // A player's or mannequin's armour is drawn by the game's armour layers.
+    if super::equine::is_equine(m.species()) || avatar(m) {
         return;
     }
     let (model, _) = body(m);

crates/horizon-client/src/mobs/spawn_selection.rs

@@ -23,61 +23,7 @@ use horizon_core::{
 use serde_json::Value;
 use std::{collections::HashMap, fs, path::Path};
 
-/// A `natural_mob_spawns` / `spawn_overrides` entry list.
-pub fn parse_entries(list: &Value) -> Vec<SpawnEntry> {
-    list.as_array()
-        .into_iter()
-        .flatten()
-        .filter_map(|e| {
-            let count = &e["count"];
-            let (min, max, constant) = match count {
-                Value::Number(n) => {
-                    let n = n.as_u64().unwrap_or(1) as u32;
-                    (n, n, true)
-                }
-                c if c["type"].as_str() == Some("minecraft:constant") => {
-                    let n = c["value"].as_u64().unwrap_or(1) as u32;
-                    (n, n, true)
-                }
-                c => (
-                    c["min_inclusive"].as_u64().unwrap_or(1) as u32,
-                    c["max_inclusive"].as_u64().unwrap_or(1) as u32,
-                    false,
-                ),
-            };
-            Some(SpawnEntry {
-                entity: e["type"].as_str()?.to_owned(),
-                weight: e["weight"].as_u64().unwrap_or(1) as u32,
-                min,
-                max,
-                constant,
-            })
-        })
-        .collect()
-}
-/// `MobSpawnSettings.MobSpawnCost`.
-#[derive(Clone, Copy, Debug, PartialEq)]
-pub struct SpawnCost {
-    pub energy_budget: f64,
-    pub charge: f64,
-}
-/// The `spawn_costs` of a `natural_mob_spawns` value.
-pub fn parse_costs(costs: &Value) -> HashMap<String, SpawnCost> {
-    costs
-        .as_object()
-        .into_iter()
-        .flatten()
-        .map(|(k, c)| {
-            (
-                k.clone(),
-                SpawnCost {
-                    energy_budget: c["energy_budget"].as_f64().unwrap_or(0.0),
-                    charge: c["charge"].as_f64().unwrap_or(0.0),
-                },
-            )
-        })
-        .collect()
-}
+pub use crate::biome::{SpawnCost, parse_costs, parse_entries};
 
 /// `MobCategory`.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]

crates/horizon-client/src/mobs/spawner.rs

@@ -111,22 +111,7 @@ impl SpawnData {
     }
 }
 
-/// `Identifier.CODEC` parsing an entity id: lowercase namespace and path
-/// characters, `minecraft` when the namespace is left out.
-pub fn normalize_id(s: &str) -> Option<String> {
-    let (ns, path) = match s.split_once(':') {
-        Some((ns, path)) => (if ns.is_empty() { "minecraft" } else { ns }, path),
-        None => ("minecraft", s),
-    };
-    let ok = |c: char, slash: bool| {
-        c.is_ascii_lowercase()
-            || c.is_ascii_digit()
-            || matches!(c, '_' | '-' | '.')
-            || slash && c == '/'
-    };
-    (ns.chars().all(|c| ok(c, false)) && path.chars().all(|c| ok(c, true)))
-        .then(|| format!("{ns}:{path}"))
-}
+pub use horizon_client_core::identifier::normalize_id;
 
 /// How much a slime's or magma cube's box is scaled by the size its data
 /// loads (`Slime.readAdditionalSaveData`: Size + 1, kept in 1..=127), which

crates/horizon-client/src/mobs/species.rs

@@ -1331,6 +1331,7 @@ impl Def {
         let mut v = vec![base];
         let extra: &[&str] = match self.species {
             Species::Pig => &["pig_baby", "cold_pig"],
+            Species::Mannequin => &["player_slim"],
             Species::Cow => &[
                 "cow_baby",
                 "cold_cow",

crates/horizon-client/src/mobs/trial_spawner.rs

@@ -106,6 +106,67 @@ impl TrialConfig {
                 .unwrap_or(d.items_to_drop_when_ominous),
         })
     }
+    /// `TrialSpawnerConfig.DIRECT_CODEC`'s encoding: the fields that differ
+    /// from their defaults (`optionalFieldOf` with a default).
+    pub fn encode(&self) -> Tag {
+        let d = Self::default();
+        let mut out = Vec::new();
+        if self.spawn_range != d.spawn_range {
+            out.push(("spawn_range", Tag::Int(self.spawn_range)));
+        }
+        for (key, value, default) in [
+            ("total_mobs", self.total_mobs, d.total_mobs),
+            (
+                "simultaneous_mobs",
+                self.simultaneous_mobs,
+                d.simultaneous_mobs,
+            ),
+            (
+                "total_mobs_added_per_player",
+                self.total_mobs_added_per_player,
+                d.total_mobs_added_per_player,
+            ),
+            (
+                "simultaneous_mobs_added_per_player",
+                self.simultaneous_mobs_added_per_player,
+                d.simultaneous_mobs_added_per_player,
+            ),
+        ] {
+            if value != default {
+                out.push((key, Tag::Float(value.to_bits())));
+            }
+        }
+        if self.ticks_between_spawn != d.ticks_between_spawn {
+            out.push(("ticks_between_spawn", Tag::Int(self.ticks_between_spawn)));
+        }
+        let weighted = |data: Tag, weight: i32| {
+            Tag::compound(vec![("data", data), ("weight", Tag::Int(weight))])
+        };
+        if !self.spawn_potentials.is_empty() {
+            let list = self.spawn_potentials.iter();
+            out.push((
+                "spawn_potentials",
+                Tag::List(list.map(|(data, w)| weighted(data.encode(), *w)).collect()),
+            ));
+        }
+        if self.loot_tables_to_eject != d.loot_tables_to_eject {
+            let list = self.loot_tables_to_eject.iter();
+            out.push((
+                "loot_tables_to_eject",
+                Tag::List(
+                    list.map(|(id, w)| weighted(Tag::String(id.as_str().into()), *w))
+                        .collect(),
+                ),
+            ));
+        }
+        if self.items_to_drop_when_ominous != d.items_to_drop_when_ominous {
+            out.push((
+                "items_to_drop_when_ominous",
+                Tag::String(self.items_to_drop_when_ominous.as_str().into()),
+            ));
+        }
+        Tag::compound(out)
+    }
     /// `calculateTargetTotalMobs`.
     pub fn target_total_mobs(&self, additional_players: i32) -> i32 {
         (self.total_mobs + self.total_mobs_added_per_player * additional_players as f32).floor()
@@ -487,6 +548,18 @@ impl TrialSpawner {
         self.next_spawn_data = None;
         self.reset_statistics();
     }
+    /// `overrideEntityToSpawn` (a spawn egg's `setEntityId`): the data resets
+    /// and both configs spawn only `id` (`withSpawning`), saved inline as
+    /// `Holder.direct`. The caller then sets the state to `inactive`.
+    pub fn override_entity(&mut self, id: &str) {
+        self.reset();
+        for slot in [&mut self.normal, &mut self.ominous] {
+            let mut entity = Compound::new();
+            entity.insert("id".into(), Tag::String(id.into()));
+            slot.config.spawn_potentials = vec![(SpawnData::new(entity, None, None), 1)];
+            slot.saved = Some(slot.config.encode());
+        }
+    }
     /// `getOrCreateNextSpawnData`: a potential at random, else empty data.
     fn next_or_create(
         &mut self,
@@ -1030,6 +1103,37 @@ mod tests {
         assert!(s.save().is_empty());
     }
 
+    #[test]
+    fn a_spawn_egg_overrides_both_configs_inline() {
+        let breeze = TrialConfig {
+            total_mobs: 2.0,
+            ..TrialConfig::default()
+        };
+        let registry = |_: &str| Some(breeze.clone());
+        let mut s = TrialSpawner::load_with(
+            &tag(
+                r#"{normal_config:"minecraft:trial_chamber/breeze/normal",spawn_data:{entity:{}},total_mobs_spawned:3}"#,
+            ),
+            &registry,
+        );
+        s.override_entity("minecraft:zombie");
+        assert_eq!(s.next_spawn_data, None);
+        assert_eq!(s.total_mobs_spawned, 0);
+        for slot in [&s.normal, &s.ominous] {
+            assert_eq!(slot.config.spawn_potentials.len(), 1);
+            assert_eq!(
+                slot.config.spawn_potentials[0].0.id().as_deref(),
+                Some("minecraft:zombie")
+            );
+            let saved = slot.saved.as_ref().expect("saved inline");
+            assert_eq!(TrialConfig::decode(saved).as_ref(), Some(&slot.config));
+        }
+        assert_eq!(
+            s.normal.saved.as_ref().and_then(|t| t.get("total_mobs")),
+            Some(&Tag::Float(2.0f32.to_bits()))
+        );
+    }
+
     #[test]
     fn registry_configs_resolve_and_are_saved_by_id() {
         let breeze = TrialConfig {

crates/horizon-client/src/mobs/villager_brain.rs

@@ -790,20 +790,6 @@ pub fn golem_detected(m: &mut Mob, now: i64) {
 // ---- Behaviours ---------------------------------------------------------
 
 pub use crate::poi_sections::Poi;
-impl Poi {
-    fn max_tickets(self) -> usize {
-        match self {
-            Poi::Meeting => 32,
-            _ => 1,
-        }
-    }
-    fn valid_range(self) -> i32 {
-        match self {
-            Poi::Meeting => 6,
-            _ => 1,
-        }
-    }
-}
 /// The POI a block state is (`PoiTypes`): job site blocks, bed heads, bells.
 pub fn poi_at(w: &MobWorld, x: i32, y: i32, z: i32) -> Option<Poi> {
     poi_of_state(w, w.world.block(x, y, z))

crates/horizon-client/src/motion.rs

@@ -1551,7 +1551,10 @@ impl MotionWorld<'_, '_, '_> {
         // Only the server broadcasts event 53 (`!level.isClientSide()`).
         let particles = !self.player.client_side
             && random.next_int_bound(5).map_err(|e| format!("{e:?}"))? == 0;
-        if sound || particles {
+        // The server also checks the slide criterion every 20 game ticks,
+        // including ticks without a sound or a particle event.
+        let criterion = !self.player.client_side && self.scene.game_time % 20 == 0;
+        if sound || particles || criterion {
             self.player.events.push(MotionEvent::HoneySlide {
                 pos,
                 sound,
@@ -3511,6 +3514,46 @@ mod tests {
         }
     }
     #[test]
+    fn a_server_copy_of_a_riptide_spin_counts_down_and_stands_again() {
+        let root = Path::new(env!("CARGO_MANIFEST_DIR"))
+            .join("../../.local/horizon-client")
+            .join(horizon_core::VANILLA_VERSION);
+        if !root.join("movement-properties.nbt").exists() {
+            return;
+        }
+        let assets = Assets::load(&root).unwrap();
+        let render = assets.reload(&root).unwrap();
+        let binding = crate::collisions::load(&root, assets.registry).unwrap();
+        let resources = MotionResources::load(&root, &assets).unwrap();
+        let mut scene = World::test_scene(&assets, &render, 2).unwrap();
+        let mut player = PlayerMotion::new(&resources, Vec3::new(20.5, 10.0, 20.5)).unwrap();
+        player.auto_spin_attack_ticks = 2;
+        player.auto_spin_attack_dmg = 8.0;
+        let mut w = MotionWorld {
+            entities: &[],
+            player: &mut player,
+            scene: &mut scene,
+            assets: &assets,
+            collision_binding: &binding,
+            resources: &resources,
+        };
+        w.update_player_pose().unwrap();
+        assert_eq!(w.player.pose, crate::pose::Pose::SpinAttack);
+        w.player.count_down_server_spin();
+        w.update_player_pose().unwrap();
+        assert_eq!(w.player.pose, crate::pose::Pose::SpinAttack);
+        assert_eq!(w.player.auto_spin_attack_dmg, 8.0);
+        w.player.count_down_server_spin();
+        assert_eq!(w.player.auto_spin_attack_ticks, 0);
+        assert_eq!(w.player.auto_spin_attack_dmg, 0.0);
+        w.update_player_pose().unwrap();
+        assert_eq!(w.player.pose, crate::pose::Pose::Standing);
+        assert_eq!(w.player.dimensions.eye_height, 1.62);
+        // Nothing to count once the spin is over.
+        w.player.count_down_server_spin();
+        assert_eq!(w.player.auto_spin_attack_ticks, 0);
+    }
+    #[test]
     fn a_riptide_spin_lies_flat_and_ends_on_the_first_entity_it_touches() {
         let root = Path::new(env!("CARGO_MANIFEST_DIR"))
             .join("../../.local/horizon-client")

crates/horizon-client/src/moved_extras.rs

@@ -13,7 +13,7 @@ use std::{
 
 /// Horizon's registry; `HORIZON_MOD_INDEX` points elsewhere (a local file
 /// for trials, whose files may then be `file://`), as for the launcher.
-pub const INDEX_URL: &str = "https://ludovic111.github.io/horizon-mods/index.json";
+pub const INDEX_URL: &str = "https://horizon-rust.github.io/horizon-mods/index.json";
 const MAX_INDEX: u64 = 16 << 20;
 
 /// An extra that is an official mod now.

crates/horizon-client/src/options_ui.rs

@@ -73,6 +73,17 @@ pub(crate) const ACCESSIBILITY_OPTIONS: &[Opt] = &[
     Opt::RotateWithMinecarts,
     Opt::HighContrastBlockOutlines,
 ];
+
+/// `MouseSettingsScreen.options` in Java Edition 26.3, in vanilla order.
+pub(crate) const MOUSE_OPTIONS: &[Opt] = &[
+    Opt::Sensitivity,
+    Opt::WheelSensitivity,
+    Opt::DiscreteScroll,
+    Opt::InvertX,
+    Opt::InvertY,
+    Opt::AllowCursorChanges,
+];
+
 impl Opt {
     /// Keep controls visible while their underlying systems are still missing.
     pub(crate) fn available(self) -> bool {
@@ -89,7 +100,6 @@ impl Opt {
                 | Opt::DistortionEffects
                 | Opt::MonochromeLogo
                 | Opt::RotateWithMinecarts
-                | Opt::HighContrastBlockOutlines
                 // Saved, but nothing in rendering reads them yet.
                 | Opt::ChunkFade
                 | Opt::ImprovedTransparency
@@ -129,8 +139,10 @@ impl Opt {
             Opt::SimulationDistance => "options.simulationDistance",
             Opt::Sensitivity => "options.sensitivity",
             Opt::WheelSensitivity => "options.mouseWheelSensitivity",
+            Opt::InvertX => "options.invertMouseX",
             Opt::InvertY => "options.invertMouseY",
             Opt::DiscreteScroll => "options.discrete_mouse_scroll",
+            Opt::AllowCursorChanges => "options.allowCursorChanges",
             Opt::Volume(_) => "soundCategory.master",
             Opt::GuiScale => "options.guiScale",
             Opt::ViewBobbing => "options.viewBobbing",
@@ -454,8 +466,10 @@ impl Opt {
             Opt::NarratorHotkey => on_off(s.file.bool("narratorHotkey")),
             Opt::RotateWithMinecarts => on_off(s.file.bool("rotateWithMinecart")),
             Opt::HighContrastBlockOutlines => on_off(s.file.bool("highContrastBlockOutline")),
+            Opt::InvertX => on_off(s.invert_x),
             Opt::InvertY => on_off(s.invert_y),
             Opt::DiscreteScroll => on_off(s.discrete_scroll),
+            Opt::AllowCursorChanges => on_off(s.allow_cursor_changes),
             Opt::ViewBobbing => on_off(s.view_bobbing),
             Opt::Vsync => on_off(s.vsync),
             Opt::Fullscreen => on_off(s.fullscreen),
@@ -652,6 +666,7 @@ impl Opt {
             Opt::TextBackground
             | Opt::HideLightningFlashes
             | Opt::HideSplashTexts
+            | Opt::HighContrastBlockOutlines
             | Opt::HideMatchedNames
             | Opt::OnlySecureChat
             | Opt::SaveChatDrafts => {
@@ -659,8 +674,10 @@ impl Opt {
                 s.file
                     .set(key, crate::options_file::V::Bool(!s.file.bool(key)));
             }
+            Opt::InvertX => s.invert_x = !s.invert_x,
             Opt::InvertY => s.invert_y = !s.invert_y,
             Opt::DiscreteScroll => s.discrete_scroll = !s.discrete_scroll,
+            Opt::AllowCursorChanges => s.allow_cursor_changes = !s.allow_cursor_changes,
             Opt::ViewBobbing => s.view_bobbing = !s.view_bobbing,
             Opt::Vsync => s.vsync = !s.vsync,
             Opt::Fullscreen => s.fullscreen = !s.fullscreen,
@@ -1434,12 +1451,7 @@ impl OptionsUi {
                 ]));
                 rows
             }
-            Page::Mouse => pairs(&[
-                Opt::Sensitivity,
-                Opt::WheelSensitivity,
-                Opt::DiscreteScroll,
-                Opt::InvertY,
-            ]),
+            Page::Mouse => pairs(MOUSE_OPTIONS),
             Page::Chat => pairs(&[
                 Opt::ChatVisibility,
                 Opt::ChatColors,
@@ -2876,6 +2888,45 @@ mod tests {
         assert_ne!(s.text_background(0.0), chat_only);
     }
 
+    #[test]
+    fn mouse_settings_match_java_26_3_option_order() {
+        let mut ui = OptionsUi::default();
+        ui.show(Page::Mouse);
+        let mut options = Vec::new();
+        for row in ui.list_rows(&Settings::default()) {
+            if let Row::Pair(a, b) = row {
+                options.push(a);
+                if let Some(b) = b {
+                    options.push(b);
+                }
+            }
+        }
+        assert_eq!(
+            options,
+            vec![
+                Opt::Sensitivity,
+                Opt::WheelSensitivity,
+                Opt::DiscreteScroll,
+                Opt::InvertX,
+                Opt::InvertY,
+                Opt::AllowCursorChanges,
+            ]
+        );
+    }
+
+    #[test]
+    fn mouse_settings_round_trip_with_java_defaults() {
+        let mut settings = Settings::default();
+        assert!(!settings.invert_x);
+        assert!(settings.allow_cursor_changes);
+        Opt::InvertX.cycle(&mut settings, false, [854, 480]);
+        Opt::AllowCursorChanges.cycle(&mut settings, false, [854, 480]);
+        let loaded = Settings::parse(&settings.serialize());
+        assert!(loaded.invert_x);
+        assert!(!loaded.allow_cursor_changes);
+        assert!(!loaded.file.bool("allowCursorChanges"));
+    }
+
     #[test]
     fn accessibility_has_all_options_and_disabled_placeholders() {
         let mut s = Settings::default();

crates/horizon-client/src/poi_sections.rs

@@ -87,6 +87,22 @@ pub enum Poi {
     Home,
     Meeting,
 }
+impl Poi {
+    /// `PoiType.maxTickets`.
+    pub fn max_tickets(self) -> usize {
+        match self {
+            Poi::Meeting => 32,
+            _ => 1,
+        }
+    }
+    /// `PoiType.validRange`.
+    pub fn valid_range(self) -> i32 {
+        match self {
+            Poi::Meeting => 6,
+            _ => 1,
+        }
+    }
+}
 
 #[cfg(test)]
 mod tests {

crates/horizon-client/src/pose.rs

@@ -78,6 +78,18 @@ impl Dimensions {
     }
 }
 impl PlayerMotion {
+    /// `LivingEntity.aiStep` counting down `autoSpinAttackTicks` for a
+    /// server's copy of a player, which runs no client tick: the spin ends
+    /// after its ticks and its damage goes with it, so the pose (and the eye
+    /// a bow or a trident is shot from) comes back to standing.
+    pub fn count_down_server_spin(&mut self) {
+        if self.auto_spin_attack_ticks > 0 {
+            self.auto_spin_attack_ticks -= 1;
+            if self.auto_spin_attack_ticks <= 0 {
+                self.auto_spin_attack_dmg = 0.0;
+            }
+        }
+    }
     pub fn dimensions_for_pose(&mut self, pose: Pose) -> Result<Dimensions> {
         Ok(pose.dimensions(self.attribute("minecraft:scale")? as f32))
     }

crates/horizon-client/src/providers.rs

@@ -0,0 +1,122 @@
+//! Vanilla's `context_int_provider` and `context_float_provider` values (furnace
+//! fuel times, brewing times), evaluated from the data pack's JSON.
+use crate::items::{ItemStack, Items};
+use serde_json::Value;
+use std::{collections::HashMap, fs, path::Path};
+
+/// Evaluator for `context_int_provider` / `context_float_provider` values.
+pub struct Providers {
+    ints: HashMap<String, Value>,
+    floats: HashMap<String, Value>,
+}
+fn load_dir(dir: &Path, prefix: &str, out: &mut HashMap<String, Value>) {
+    let Ok(entries) = fs::read_dir(dir) else {
+        return;
+    };
+    for e in entries.flatten() {
+        let p = e.path();
+        let name = p
+            .file_stem()
+            .and_then(|s| s.to_str())
+            .unwrap_or("")
+            .to_owned();
+        if p.is_dir() {
+            load_dir(&p, &format!("{prefix}{name}/"), out);
+        } else if let Ok(bytes) = fs::read(&p)
+            && let Ok(v) = serde_json::from_slice(&bytes)
+        {
+            out.insert(format!("minecraft:{prefix}{name}"), v);
+        }
+    }
+}
+impl Providers {
+    pub fn load(root: &Path) -> Self {
+        let mut ints = HashMap::new();
+        let mut floats = HashMap::new();
+        load_dir(
+            &root.join("data/minecraft/context_int_provider"),
+            "",
+            &mut ints,
+        );
+        load_dir(
+            &root.join("data/minecraft/context_float_provider"),
+            "",
+            &mut floats,
+        );
+        Self { ints, floats }
+    }
+    fn eval(v: &Value, fast: bool, table: &HashMap<String, Value>, depth: u32) -> f64 {
+        if depth > 16 {
+            return 0.0;
+        }
+        match v {
+            Value::Number(n) => n.as_f64().unwrap_or(0.0),
+            Value::String(name) => table
+                .get(name)
+                .map_or(0.0, |v| Self::eval(v, fast, table, depth + 1)),
+            Value::Object(o) => {
+                let f =
+                    |k: &str| Self::eval(o.get(k).unwrap_or(&Value::Null), fast, table, depth + 1);
+                match o.get("type").and_then(Value::as_str).unwrap_or("") {
+                    "minecraft:div" => {
+                        let r = f("right");
+                        if r == 0.0 {
+                            0.0
+                        } else {
+                            (f("left") / r).trunc()
+                        }
+                    }
+                    "minecraft:mul" => f("left") * f("right"),
+                    "minecraft:add" | "minecraft:sum" => f("left") + f("right"),
+                    "minecraft:sub" => f("left") - f("right"),
+                    "minecraft:constant" => f("value"),
+                    "minecraft:conditional" => {
+                        // The only condition in the pinned data: block/fast_cooking.
+                        let condition = o.get("condition").and_then(Value::as_str)
+                            == Some("minecraft:block/fast_cooking");
+                        if condition && fast {
+                            f("on_true")
+                        } else {
+                            f("on_false")
+                        }
+                    }
+                    _ => 0.0,
+                }
+            }
+            _ => 0.0,
+        }
+    }
+    /// A plain `context_int_provider` value or reference (no context conditions).
+    pub fn int_value(&self, v: &Value) -> i32 {
+        Self::eval(v, false, &self.ints, 0) as i32
+    }
+    /// A plain `context_float_provider` value or reference; `default` when absent.
+    pub fn float_value(&self, v: &Value, default: f32) -> f32 {
+        if v.is_null() {
+            default
+        } else {
+            Self::eval(v, false, &self.floats, 0) as f32
+        }
+    }
+    #[cfg(test)]
+    pub fn empty() -> Self {
+        Self {
+            ints: HashMap::new(),
+            floats: HashMap::new(),
+        }
+    }
+    pub fn burn_time(&self, items: &Items, stack: &ItemStack, fast: bool) -> i32 {
+        items
+            .get(&stack.item)
+            .and_then(|i| i.fuel.as_ref())
+            .map_or(0, |(time, _)| Self::eval(time, fast, &self.ints, 0) as i32)
+    }
+    pub fn speed(&self, items: &Items, stack: &ItemStack, fast: bool) -> f32 {
+        items
+            .get(&stack.item)
+            .and_then(|i| i.fuel.as_ref())
+            .map_or(1.0, |(_, speed)| {
+                Self::eval(speed, fast, &self.floats, 0) as f32
+            })
+    }
+}

crates/horizon-client/src/save.rs

@@ -105,14 +105,7 @@ pub fn chunks_with_block_entities<'a>(
 }
 
 use horizon_client_core::nbt_value::string;
-pub use horizon_client_core::nbt_value::{number, text};
-pub(crate) fn float(tag: Option<&Tag>) -> Option<f64> {
-    Some(match tag? {
-        Tag::Float(b) => f64::from(f32::from_bits(*b)),
-        Tag::Double(b) => f64::from_bits(*b),
-        other => number(Some(other))? as f64,
-    })
-}
+pub use horizon_client_core::nbt_value::{float, number, text};
 /// Insert or replace a key of a compound tag.
 pub(crate) fn put(tag: &mut Tag, key: &str, value: Tag) {
     if let Tag::Compound(map) = tag {

crates/horizon-client/src/screen_effects.rs

@@ -69,6 +69,12 @@ pub struct ScreenEffects {
     pub vignette_brightness: f32,
     pub portal: f32,
     pub o_portal: f32,
+    /// Nausea's `MobEffectInstance.BlendState` factor and the previous tick's.
+    pub nausea: f32,
+    pub o_nausea: f32,
+    /// `LocalPlayer.spinningEffectTime` and `spinningEffectSpeed` (degrees).
+    pub spinning_time: f32,
+    pub spinning_speed: f32,
 }
 impl Default for ScreenEffects {
     fn default() -> Self {
@@ -76,6 +82,10 @@ impl Default for ScreenEffects {
             vignette_brightness: 1.0,
             portal: 0.0,
             o_portal: 0.0,
+            nausea: 0.0,
+            o_nausea: 0.0,
+            spinning_time: 0.0,
+            spinning_speed: 0.0,
         }
     }
 }
@@ -105,6 +115,28 @@ impl ScreenEffects {
         };
         self.portal = (self.portal + step).clamp(0.0, 1.0);
     }
+    /// `LocalPlayer.tickSpinningEffect` and Nausea's blend. `nausea` is `None`
+    /// without the effect, else whether it is past its blend-out point
+    /// (`!endsWithin(60)`, `MobEffects.NAUSEA`).
+    pub fn tick_spinning(&mut self, nausea: Option<bool>) {
+        self.o_nausea = self.nausea;
+        match nausea {
+            // BlendState.tick: fades in over 150 ticks and out over 20.
+            Some(active) => {
+                let (target, duration) = if active { (1.0, 150.0) } else { (0.0, 20.0) };
+                self.nausea += (target - self.nausea).clamp(-1.0 / duration, 1.0 / duration);
+            }
+            // The blend state belongs to the instance, so a new one starts at 0.
+            None => self.nausea = 0.0,
+        }
+        if self.portal > 0.0 || self.nausea > 0.0 {
+            self.spinning_speed =
+                (self.portal * 20.0 + self.nausea * 7.0) / (self.portal + self.nausea);
+            self.spinning_time += self.spinning_speed;
+        } else {
+            self.spinning_speed = 0.0;
+        }
+    }
     pub fn build(&self, input: &ScreenInputs) -> Vec<ScreenQuad> {
         let mut out = Vec::new();
         let sprite = |name: &str| input.sprites.get(name).map(|r| [r.u0, r.v0, r.u1, r.v1]);

crates/horizon-client/src/sculk.rs

@@ -2,7 +2,7 @@
 //! `VibrationSelector`) shared by sculk sensors, shriekers and wardens, the
 //! sculk block entities and the per-player warden spawn tracker.
 pub use crate::chunk::block_entity::{Data, Info, SculkEntity, SculkKind, Selector};
-use crate::mobs::Who;
+use horizon_client_core::who::Who;
 use horizon_core::{
     geometry::{Direction, Vec3, traverse_blocks},
     position::BlockPos,
@@ -315,7 +315,9 @@ fn info_to_nbt(info: &Info) -> Tag {
     ])
 }
 fn info_from_nbt(tag: &Tag) -> Option<Info> {
-    let event = intern(&crate::save::text(tag.get("game_event"))?)?;
+    let event = intern(&horizon_client_core::nbt_value::text(
+        tag.get("game_event"),
+    )?)?;
     let distance = match tag.get("distance") {
         Some(Tag::Float(f)) => f32::from_bits(*f),
         _ => 0.0,

crates/horizon-client/src/settings.rs

@@ -167,6 +167,8 @@ pub struct Settings {
     /// Every option in its stored form (the typed fields above mirror it).
     pub file: OptionsFile,
     pub invert_x: bool,
+    /// Allow widgets to replace the default mouse cursor icon.
+    pub allow_cursor_changes: bool,
     pub toggle_attack: bool,
     pub toggle_use: bool,
     /// Taps of the sprint key counted as double taps (sprintWindow).
@@ -222,6 +224,7 @@ impl Default for Settings {
             invert_y: false,
             mouse_wheel_sensitivity: 1.0,
             discrete_scroll: false,
+            allow_cursor_changes: true,
             toggle_crouch: false,
             toggle_sprint: false,
             auto_jump: false,
@@ -408,6 +411,7 @@ impl Settings {
             invert_y: f.bool("invertYMouse"),
             mouse_wheel_sensitivity: f.double("mouseWheelSensitivity") as f32,
             discrete_scroll: f.bool("discrete_mouse_scroll"),
+            allow_cursor_changes: f.bool("allowCursorChanges"),
             toggle_crouch: f.bool("toggleCrouch"),
             toggle_sprint: f.bool("toggleSprint"),
             toggle_attack: f.bool("toggleAttack"),
@@ -497,6 +501,7 @@ impl Settings {
             self.mouse_wheel_sensitivity,
         );
         put_b(&mut f, "discrete_mouse_scroll", self.discrete_scroll);
+        put_b(&mut f, "allowCursorChanges", self.allow_cursor_changes);
         put_b(&mut f, "toggleCrouch", self.toggle_crouch);
         put_b(&mut f, "toggleSprint", self.toggle_sprint);
         put_b(&mut f, "toggleAttack", self.toggle_attack);
@@ -616,8 +621,10 @@ pub enum Opt {
     SimulationDistance,
     Sensitivity,
     WheelSensitivity,
-    InvertY,
     DiscreteScroll,
+    InvertX,
+    InvertY,
+    AllowCursorChanges,
     Volume(usize),
     GuiScale,
     ViewBobbing,

crates/horizon-client/src/skins.rs

@@ -17,6 +17,8 @@ pub enum Signature {
 #[derive(Clone, Debug, Default, PartialEq, Eq)]
 pub struct Textures {
     pub skin: Option<String>,
+    /// The skin's `metadata.model` is `slim` (`PlayerModelType.SLIM`).
+    pub slim: bool,
     pub cape: Option<String>,
     pub elytra: Option<String>,
     pub signed: bool,
@@ -101,6 +103,13 @@ pub fn unpack(value: &str, signature: Signature, valid_uris: &[&str]) -> Texture
         if !allowed {
             return empty;
         }
+        if kind == "SKIN" {
+            out.slim = texture
+                .get("metadata")
+                .and_then(|m| m.get("model"))
+                .and_then(|m| m.as_str())
+                == Some("slim");
+        }
         let slot = match kind.as_str() {
             "SKIN" => &mut out.skin,
             "CAPE" => &mut out.cape,
@@ -809,6 +818,21 @@ pub fn sha1(data: &[u8]) -> [u8; 20] {
 
 #[cfg(test)]
 mod tests {
+    /// `MinecraftProfileTexture.getMetadata("model")`: `slim` marks a slim
+    /// skin; no metadata is the wide (classic) model.
+    #[test]
+    fn a_skins_model_comes_from_its_metadata() {
+        use super::{Signature, TEXTURE_URIS, unpack};
+        let slim = "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHBzOi8vdGV4dHVyZXMubWluZWNyYWZ0Lm5ldC90ZXh0dXJlL2FiYyIsIm1ldGFkYXRhIjp7Im1vZGVsIjoic2xpbSJ9fX19";
+        let wide = "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHBzOi8vdGV4dHVyZXMubWluZWNyYWZ0Lm5ldC90ZXh0dXJlL2FiYyJ9fX0=";
+        let t = unpack(slim, Signature::Signed, &TEXTURE_URIS);
+        assert_eq!(
+            t.skin.as_deref(),
+            Some("https://textures.minecraft.net/texture/abc")
+        );
+        assert!(t.slim);
+        assert!(!unpack(wide, Signature::Signed, &TEXTURE_URIS).slim);
+    }
     #[test]
     fn profiles_parse_like_resolvable_profiles() {
         use super::{NameOrId, Signature, parse_profile};

crates/horizon-client/src/vault.rs

@@ -48,7 +48,9 @@ impl VaultConfig {
         let Tag::Compound(_) = tag else {
             return None;
         };
-        let range = |k: &str, default: f64| crate::save::float(tag.get(k)).unwrap_or(default);
+        let range = |k: &str, default: f64| {
+            horizon_client_core::nbt_value::float(tag.get(k)).unwrap_or(default)
+        };
         let config = Self {
             loot_table: identifier(tag.get("loot_table"))
                 .unwrap_or_else(|| DEFAULT_LOOT_TABLE.into()),
@@ -81,7 +83,7 @@ impl VaultConfig {
             );
         }
         if let Some(key) = &self.key_item {
-            out.insert("key_item".into(), crate::save::item_to_nbt(key));
+            out.insert("key_item".into(), horizon_items::item_nbt::item_to_nbt(key));
         }
         if let Some(table) = &self.override_loot_table_to_display {
             out.insert(
@@ -181,7 +183,7 @@ impl Default for Vault {
 /// An `Identifier` (`minecraft` when the namespace is left out).
 fn identifier(t: Option<&Tag>) -> Option<String> {
     match t? {
-        Tag::String(s) => crate::mobs::spawner::normalize_id(&s.to_string_lossy()),
+        Tag::String(s) => horizon_client_core::identifier::normalize_id(&s.to_string_lossy()),
         _ => None,
     }
 }
@@ -189,11 +191,12 @@ fn identifier(t: Option<&Tag>) -> Option<String> {
 fn stack(tag: &Tag) -> Option<ItemStack> {
     let id = identifier(tag.get("id"))?;
     if let Some(count) = tag.get("count")
-        && !crate::save::number(Some(count)).is_some_and(|c| (1..=99).contains(&c))
+        && !horizon_client_core::nbt_value::number(Some(count))
+            .is_some_and(|c| (1..=99).contains(&c))
     {
         return None;
     }
-    let mut item = crate::save::item_from_nbt(tag)?;
+    let mut item = horizon_items::item_nbt::item_from_nbt(tag)?;
     item.item = id.as_str().into();
     (&*item.item != "minecraft:air").then_some(item)
 }
@@ -266,7 +269,8 @@ impl Vault {
             let get = |k: &str| server.and_then(|s| s.get(k));
             v.rewarded_players = uuids(get("rewarded_players")).unwrap_or_default();
             v.state_updating_resumes_at =
-                crate::save::number(get("state_updating_resumes_at")).unwrap_or(0);
+                horizon_client_core::nbt_value::number(get("state_updating_resumes_at"))
+                    .unwrap_or(0);
             v.items_to_eject = match get("items_to_eject") {
                 Some(Tag::List(list)) => list
                     .iter()
@@ -281,8 +285,9 @@ impl Vault {
             let get = |k: &str| shared.and_then(|s| s.get(k));
             v.display_item = get("display_item").and_then(stack);
             v.connected_players = uuids(get("connected_players")).unwrap_or_default();
-            v.connected_particles_range = crate::save::float(get("connected_particles_range"))
-                .unwrap_or(DEFAULT_DEACTIVATION_RANGE);
+            v.connected_particles_range =
+                horizon_client_core::nbt_value::float(get("connected_particles_range"))
+                    .unwrap_or(DEFAULT_DEACTIVATION_RANGE);
         }
         v
     }
@@ -305,7 +310,7 @@ impl Vault {
             let items = self
                 .items_to_eject
                 .iter()
-                .map(crate::save::item_to_nbt)
+                .map(horizon_items::item_nbt::item_to_nbt)
                 .collect();
             server.insert("items_to_eject".into(), Tag::List(items));
         }
@@ -325,7 +330,10 @@ impl Vault {
     fn update_shared(&self) -> Tag {
         let mut out = Compound::new();
         if let Some(item) = &self.display_item {
-            out.insert("display_item".into(), crate::save::item_to_nbt(item));
+            out.insert(
+                "display_item".into(),
+                horizon_items::item_nbt::item_to_nbt(item),
+            );
         }
         if !self.connected_players.is_empty() {
             out.insert(

crates/horizon-friends/src/reach.rs

@@ -11,7 +11,7 @@ use std::{
 
 /// Where the troubleshooting lives (shown to hosts nobody can reach).
 pub const HELP_URL: &str =
-    "https://github.com/ludovic111/horizon/blob/main/docs/play-with-friends.md#troubleshooting";
+    "https://github.com/horizon-rust/horizon/blob/main/docs/play-with-friends.md#troubleshooting";
 
 #[derive(Clone, Debug)]
 pub struct Options {

crates/horizon-mod-registry/README.md

@@ -3,7 +3,7 @@
 The service behind the registry's submission form (`playhorizon.dev/mods/submit`). A creator signs in with GitHub and
 sends a file with its page; the service runs the file's own checks (`horizon_mods::index::inspect`, the signature, the
 entry's fields), uploads it to the `staging` release of
-[ludovic111/horizon-mods](https://github.com/ludovic111/horizon-mods) as `<sha256>.<extension>`, and opens a pull
+[horizon-rust/horizon-mods](https://github.com/horizon-rust/horizon-mods) as `<sha256>.<extension>`, and opens a pull
 request adding or updating `mods/<id>.toml`. That repository's CI checks it again, with a trial run of a mod in the
 sandbox; reviewers decide, and merging publishes. Formats and rules: [docs/api/mod-index.md](../../docs/api/mod-index.md).
 
@@ -43,7 +43,7 @@ REGISTRY_PUBLIC_URL=http://localhost:4173 REGISTRY_SESSION_KEY=... GITHUB_CLIENT
 | `REGISTRY_SESSION_KEY` | 32 characters or more, random: signs sessions |
 | `GITHUB_CLIENT_ID`, `GITHUB_CLIENT_SECRET` | The OAuth app |
 | `GITHUB_BOT_TOKEN` | Fine-grained, the registry repository only: Contents and Pull requests read and write |
-| `REGISTRY_REPO` | Default `ludovic111/horizon-mods` |
+| `REGISTRY_REPO` | Default `horizon-rust/horizon-mods` |
 | `REGISTRY_DB` | The ratings' SQLite file: default `/data/registry.sqlite3`, the volume |
 | `PORT` | Default 8080 |
 

crates/horizon-mod-registry/src/lib.rs

@@ -75,7 +75,8 @@ impl Config {
             session_key: key.into_bytes(),
             github: GitHub::new(
                 github::Endpoints::default(),
-                std::env::var("REGISTRY_REPO").unwrap_or_else(|_| "ludovic111/horizon-mods".into()),
+                std::env::var("REGISTRY_REPO")
+                    .unwrap_or_else(|_| "horizon-rust/horizon-mods".into()),
                 var("GITHUB_CLIENT_ID")?,
                 var("GITHUB_CLIENT_SECRET")?,
                 var("GITHUB_BOT_TOKEN")?,

crates/horizon-mods/src/index.rs

@@ -21,7 +21,7 @@ pub const SCHEMA: u32 = 1;
 /// The biggest file the registry takes (a `.hmod` with content, a `.hpack`).
 pub const MAX_FILE: u64 = 64 << 20;
 /// Where files may be downloaded from: the registry's release assets.
-pub const FILE_HOST: &str = "https://github.com/ludovic111/horizon-mods/releases/download/";
+pub const FILE_HOST: &str = "https://github.com/horizon-rust/horizon-mods/releases/download/";
 
 #[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
 pub struct Index {
@@ -43,6 +43,8 @@ pub struct Index {
 pub enum Kind {
     /// A `.hmod`.
     Mod,
+    /// A source-only native mixin bundle, compiled into an isolated game build.
+    NativeMod,
     /// A `.hpack`: registry mods played together as a profile.
     Modpack,
     /// A resource pack (`.zip` with `pack.mcmeta`) made or tested for Horizon.
@@ -57,6 +59,7 @@ impl Kind {
     pub fn name(&self) -> &str {
         match self {
             Kind::Mod => "mod",
+            Kind::NativeMod => "native-mod",
             Kind::Modpack => "modpack",
             Kind::ResourcePack => "resourcepack",
             Kind::Shader => "shader",
@@ -68,6 +71,7 @@ impl Kind {
     pub fn extension(&self) -> Option<&'static str> {
         match self {
             Kind::Mod => Some("hmod"),
+            Kind::NativeMod => Some("hnmod"),
             Kind::Modpack => Some("hpack"),
             Kind::ResourcePack => Some("zip"),
             Kind::Shader => Some(horizon_shader_api::EXTENSION),
@@ -80,6 +84,7 @@ impl From<String> for Kind {
     fn from(name: String) -> Kind {
         match name.as_str() {
             "mod" => Kind::Mod,
+            "native-mod" => Kind::NativeMod,
             "modpack" => Kind::Modpack,
             "resourcepack" => Kind::ResourcePack,
             "shader" => Kind::Shader,
@@ -552,6 +557,7 @@ impl Facts {
 /// this build doesn't know are refused: their checks come with their formats.
 pub fn inspect(kind: &Kind, path: &Path) -> Result<Facts, String> {
     match kind {
+        Kind::NativeMod => Ok(native::Bundle::read(path)?.manifest.facts()),
         Kind::Mod => {
             let Package { manifest: m, wasm } = Package::read(path)?;
             crate::Content::read(path, &m)?;
@@ -656,7 +662,7 @@ fn check_resource_pack(path: &Path) -> Result<String, String> {
 /// formats.
 pub fn open(kind: &Kind) -> Result<(), String> {
     match kind {
-        Kind::Mod | Kind::Modpack | Kind::ResourcePack | Kind::Shader => Ok(()),
+        Kind::Mod | Kind::NativeMod | Kind::Modpack | Kind::ResourcePack | Kind::Shader => Ok(()),
         Kind::Other(name) => Err(format!("the registry doesn't take {name} yet")),
     }
 }
@@ -666,6 +672,7 @@ fn names(caps: &[Capability]) -> String {
     format!("[{}]", names.join(", "))
 }
 
+pub mod native;
 pub mod registry;
 #[cfg(test)]
 mod tests;

crates/horizon-mods/src/index/native.rs

@@ -0,0 +1,238 @@
+//! Source-only native mixin bundles. Reading a bundle never executes its code.
+use super::{Facts, valid_id};
+use serde::{Deserialize, Serialize};
+use std::{collections::BTreeMap, io::Read, path::Path};
+
+pub const MANIFEST: &str = "horizon-native.json";
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct Manifest {
+    pub schema: u32,
+    pub id: String,
+    pub version: String,
+    pub game: String,
+    /// Exact source revisions tested together, never mutable tags.
+    pub horizon: String,
+    pub mixins: String,
+}
+
+pub fn revision(value: &str) -> bool {
+    value.len() == 40
+        && value
+            .bytes()
+            .all(|b| b.is_ascii_digit() || (b'a'..=b'f').contains(&b))
+}
+
+impl Manifest {
+    pub fn check(&self) -> Result<(), String> {
+        if self.schema != 1
+            || !valid_id(&self.id)
+            || self.version.is_empty()
+            || self.game.is_empty()
+            || !revision(&self.horizon)
+            || !revision(&self.mixins)
+        {
+            return Err(
+                "invalid native manifest: schema 1, id, version, game and exact revisions required"
+                    .into(),
+            );
+        }
+        Ok(())
+    }
+
+    /// Carries the exact native compatibility contract in the index's API field.
+    pub fn api(&self) -> String {
+        format!("native-1/{}/{}", self.horizon, self.mixins)
+    }
+
+    pub fn facts(&self) -> Facts {
+        Facts {
+            id: Some(self.id.clone()),
+            version: Some(self.version.clone()),
+            api: self.api(),
+            game: Some(self.game.clone()),
+            ..Facts::default()
+        }
+    }
+}
+
+pub struct Bundle {
+    pub manifest: Manifest,
+    /// Validated relative paths; only TOML and Rust beneath `mixins/<id>/`.
+    pub files: BTreeMap<String, Vec<u8>>,
+}
+
+impl Bundle {
+    pub fn read(path: &Path) -> Result<Self, String> {
+        let file = std::fs::File::open(path).map_err(|e| e.to_string())?;
+        let mut zip = zip::ZipArchive::new(file).map_err(|e| e.to_string())?;
+        if zip.len() > 512 {
+            return Err("native bundle has too many entries".into());
+        }
+        let mut files = BTreeMap::new();
+        let mut total = 0u64;
+        for i in 0..zip.len() {
+            let mut entry = zip.by_index(i).map_err(|e| e.to_string())?;
+            let name = entry.name().to_owned();
+            if entry.is_dir() {
+                continue;
+            }
+            if entry
+                .unix_mode()
+                .is_some_and(|m| m & 0o170000 != 0 && m & 0o170000 != 0o100000)
+                || name.contains('\\')
+                || name
+                    .split('/')
+                    .any(|p| p.is_empty() || p == "." || p == "..")
+                || name.starts_with('/')
+                || name.contains(':')
+            {
+                return Err(format!("invalid native bundle path: {name}"));
+            }
+            let mut bytes = Vec::new();
+            (&mut entry)
+                .take(super::MAX_FILE + 1)
+                .read_to_end(&mut bytes)
+                .map_err(|e| e.to_string())?;
+            total += bytes.len() as u64;
+            if total > super::MAX_FILE {
+                return Err("native bundle expands beyond 64 MiB".into());
+            }
+            if files.insert(name, bytes).is_some() {
+                return Err("duplicate native bundle path".into());
+            }
+        }
+        let manifest: Manifest =
+            serde_json::from_slice(files.get(MANIFEST).ok_or("missing horizon-native.json")?)
+                .map_err(|e| e.to_string())?;
+        manifest.check()?;
+        let prefix = format!("mixins/{}/", manifest.id);
+        for name in files.keys().filter(|n| n.as_str() != MANIFEST) {
+            if !name.starts_with(&prefix) || !(name.ends_with(".rs") || name.ends_with(".toml")) {
+                return Err(format!("unexpected native source: {name}"));
+            }
+        }
+        let source = files
+            .get(&format!("{prefix}horizon-mixin.toml"))
+            .ok_or("missing horizon-mixin.toml")?;
+        let source: toml::Value =
+            toml::from_str(std::str::from_utf8(source).map_err(|e| e.to_string())?)
+                .map_err(|e| e.to_string())?;
+        if source
+            .get("mod")
+            .and_then(|v| v.get("id"))
+            .and_then(|v| v.as_str())
+            != Some(&manifest.id)
+            || source
+                .get("mod")
+                .and_then(|v| v.get("version"))
+                .and_then(|v| v.as_str())
+                != Some(&manifest.version)
+            || source
+                .get("compatibility")
+                .and_then(|v| v.get("horizon_revision"))
+                .and_then(|v| v.as_str())
+                != Some(&manifest.horizon)
+        {
+            return Err("native manifest and mixin identity/revision differ".into());
+        }
+        Ok(Self { manifest, files })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::io::Write;
+
+    fn manifest() -> Manifest {
+        Manifest {
+            schema: 1,
+            id: "veinminer".into(),
+            version: "0.3.0".into(),
+            game: "26.3".into(),
+            horizon: "a".repeat(40),
+            mixins: "b".repeat(40),
+        }
+    }
+    fn read(name: &str, extras: &[(&str, &[u8])], mixin: &str) -> Result<Bundle, String> {
+        let path =
+            std::env::temp_dir().join(format!("native-bundle-{name}-{}.hnmod", std::process::id()));
+        let mut zip = zip::ZipWriter::new(std::fs::File::create(&path).unwrap());
+        let options = zip::write::SimpleFileOptions::default();
+        zip.start_file(MANIFEST, options).unwrap();
+        zip.write_all(&serde_json::to_vec(&manifest()).unwrap())
+            .unwrap();
+        zip.start_file("mixins/veinminer/horizon-mixin.toml", options)
+            .unwrap();
+        zip.write_all(mixin.as_bytes()).unwrap();
+        for (name, bytes) in extras {
+            zip.start_file(*name, options).unwrap();
+            zip.write_all(bytes).unwrap();
+        }
+        zip.finish().unwrap();
+        let result = Bundle::read(&path);
+        std::fs::remove_file(path).unwrap();
+        result
+    }
+    fn mixin() -> String {
+        format!(
+            "[mod]\nid = \"veinminer\"\nversion = \"0.3.0\"\n[compatibility]\nhorizon_revision = \"{}\"\n",
+            "a".repeat(40)
+        )
+    }
+    #[test]
+    fn source_bundle_carries_exact_compatibility_into_index_facts() {
+        let bundle = read(
+            "valid",
+            &[("mixins/veinminer/hook.rs", b"fn hook() {}")],
+            &mixin(),
+        )
+        .unwrap();
+        assert_eq!(bundle.manifest, manifest());
+        let facts = bundle.manifest.facts();
+        assert_eq!(
+            facts.api,
+            format!("native-1/{}/{}", "a".repeat(40), "b".repeat(40))
+        );
+        assert_eq!(facts.id.as_deref(), Some("veinminer"));
+        assert!(facts.capabilities.is_empty());
+    }
+    #[test]
+    fn rejects_path_traversal_and_non_source_payloads() {
+        for (i, name) in [
+            "../escape.rs",
+            "/absolute.rs",
+            "mixins/other/hook.rs",
+            "mixins/veinminer/code.dll",
+            "mixins\\veinminer\\hook.rs",
+        ]
+        .iter()
+        .enumerate()
+        {
+            assert!(read(&format!("bad-path-{i}"), &[(name, b"bad")], &mixin()).is_err());
+        }
+    }
+    #[test]
+    fn rejects_missing_or_mismatched_mixin_identity_without_panicking() {
+        assert!(read("missing-mod", &[], "[unrelated]\nvalue = 1").is_err());
+        assert!(
+            read(
+                "wrong-revision",
+                &[],
+                &mixin().replace(&"a".repeat(40), &"c".repeat(40))
+            )
+            .is_err()
+        );
+        assert!(read("wrong-version", &[], &mixin().replace("0.3.0", "0.2.0")).is_err());
+        assert!(
+            Manifest {
+                horizon: "nightly".into(),
+                ..manifest()
+            }
+            .check()
+            .is_err()
+        );
+    }
+}

crates/horizon-mods/src/index/registry.rs

@@ -1,4 +1,4 @@
-//! The registry repository (`ludovic111/horizon-mods`, docs/api/mod-index.md):
+//! The registry repository (`horizon-rust/horizon-mods`, docs/api/mod-index.md):
 //! one `mods/<id>.toml` per project, written by the submission form or by
 //! hand and reviewed in a pull request, plus `revoked.toml`. Its CI turns
 //! them into `index.json` with [`build`], reading every listed file, and

crates/horizon-mods/src/index/registry/tests.rs

@@ -30,7 +30,7 @@ description = "`/where` puts them in chat, `/coords` hides or shows the panel."
 authors = ["Horizon"]
 owners = ["ludovic111"]
 license = "MIT"
-source = "https://github.com/ludovic111/horizon/tree/main/crates/horizon-mod-sdk/examples/coords-hud"
+source = "https://github.com/horizon-rust/horizon/tree/main/crates/horizon-mod-sdk/examples/coords-hud"
 icon = "icons/coords_hud.png"
 key = "RWTVtuGb/GRXcBf3Re5hzM07EzoStr2sLTJjghJia0xX15ULoZRFFZDb"
 
@@ -52,7 +52,7 @@ summary = "Coordinates and a calm render distance."
 authors = ["Horizon"]
 owners = ["ludovic111"]
 license = "MIT"
-source = "https://github.com/ludovic111/horizon-mods"
+source = "https://github.com/horizon-rust/horizon-mods"
 
 [[versions]]
 version = "1.0.0"
@@ -69,7 +69,7 @@ summary = "A post-processing pass over the world."
 authors = ["Horizon"]
 owners = ["ludovic111"]
 license = "MIT"
-source = "https://github.com/ludovic111/horizon-mods"
+source = "https://github.com/horizon-rust/horizon-mods"
 
 [[versions]]
 version = "1.0.0"
@@ -123,7 +123,7 @@ impl Scratch {
             registry: &repo,
             files: &files,
             release: super::super::FILE_HOST,
-            site: "https://ludovic111.github.io/horizon-mods/",
+            site: "https://horizon-rust.github.io/horizon-mods/",
             generated: "2026-10-24T18:00:00Z".into(),
         })
     }

crates/horizon-mods/src/index/tests.rs

@@ -131,7 +131,7 @@ fn refuses_broken_indexes() {
     assert!(e.contains("https"), "{e}");
     // A local test registry may list files on disk; the published one may not.
     let local = text.replace(
-        "https://github.com/ludovic111/horizon-mods/releases/download/coords_hud-0.1.0/",
+        "https://github.com/horizon-rust/horizon-mods/releases/download/coords_hud-0.1.0/",
         "file:///tmp/",
     );
     assert!(Index::parse(&local).unwrap_err().contains("https"));