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horizon-airdef/website/data/roadmap.json
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Ludovic Marie c04b7afdb9 Hub: the Kanban and the Journal tabs, and /hub/journal.json 
Kanban: every open issue and pull request and what closed in the last seven days, placed in To do,
In progress, In review and Done by the rules of Kira's work board, each card with its roadmap item
(its roadmap:<id> label or the item linking it) and a filter by item. Journal: every release with its
changes grouped by roadmap item, the merges no release has yet, and a weekly summary from
roadmap/journal/<year>-<week>.md. The same journal is /hub/journal.json, for Kira's #updates and posts
elsewhere: each entry names the roadmap items it moved and shipped, with their 240-character text.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-25 16:00:03 +01:00

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{
"format": "horizon-roadmap",
"version": 1,
"source": "roadmap/roadmap.toml",
"overview": {
"today_plain": "Horizon is Minecraft: Java Edition 26.3 rewritten from scratch in Rust, so it runs faster on the same computer. Single player, LAN, servers, resource packs and Horizon's own mods work today, on your own copy of the game.",
"today_dev": "A native Rust and wgpu reimplementation of Java 26.3: the same saves, rules and terrain, checked against the real game by more than 300 differential harnesses (a Java oracle and a Rust probe on the same inputs). Single player runs on its own server thread, like vanilla's integrated server.",
"help_plain": "Play it and tell us what differs from vanilla (Discord or GitHub), run the benchmark on your computer, vote for what you want next, or pick one of the Help wanted items.",
"help_dev": "Read CONTRIBUTING.md, pick a Help wanted item or a To do card, check vanilla's code for the behaviour, and paste the block `python3 tools/pr_ready.py` prints in your pull request."
},
"statuses": [
{
"id": "now",
"name": "Now"
},
{
"id": "next",
"name": "Next"
},
{
"id": "later",
"name": "Later"
},
{
"id": "help-wanted",
"name": "Help wanted"
},
{
"id": "shipped",
"name": "Recently shipped"
}
],
"areas": [
{
"id": "performance",
"name": "Performance"
},
{
"id": "modpacks",
"name": "Modpacks"
},
{
"id": "servers",
"name": "Servers and multiplayer"
},
{
"id": "mods",
"name": "Mods and API"
},
{
"id": "gameplay",
"name": "Gameplay parity"
},
{
"id": "rendering",
"name": "Rendering"
},
{
"id": "launcher",
"name": "Launcher"
},
{
"id": "extras",
"name": "Horizon extras"
},
{
"id": "project",
"name": "Code and tools"
}
],
"items": [
{
"id": "smooth-frames",
"title": "Steady frames at long render distances",
"status": "now",
"area": "performance",
"plain": "Making Horizon faster than vanilla on every computer, with smooth camera movement even at 32 chunks, by spreading the work better over the processor's cores.",
"dev": "Frame pacing at render distance 32 (#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), the worker pool leaves one core as vanilla does (#1778), and the terrain vertex arena is read as storage where flat draws run (#1742). Still open: far terrain at 48 to 64 chunks (#718) and CPU-bound fields of block entities (#717). Every change shows before and after numbers from `tools/perf_bench.py` against vanilla 26.3 (docs/benchmark.md).",
"links": [
"#678",
"#1760",
"#1778",
"#1742",
"#718",
"#717",
"docs/benchmark.md"
],
"focus": true
},
{
"id": "block-storage",
"title": "Faster block lookups",
"status": "now",
"area": "performance",
"plain": "Speeding up the code that reads and writes the blocks of the world, which almost everything in the game goes through: generation, lighting, meshing and ticking.",
"dev": "`PalettedContainer` and `PackedStorage` find an entry's word by multiply and shift instead of an integer division (#1790, #1794); meshing looks up baked models by index, not by name (#1747). Each change keeps the paletted storage harnesses identical and shows its microbenchmark (docs/performance/paletted-container-access-results.md).",
"links": [
"#1790",
"#1794",
"#1747",
"docs/performance/paletted-container-access-results.md"
]
},
{
"id": "modpack-worldgen",
"title": "Modpacks' world generation, natively",
"status": "now",
"area": "modpacks",
"plain": "Making the world-generation mods of popular modpacks (new structures, YUNG's dungeons and mineshafts, packs built on Lithostitched) generate their worlds in Horizon, natively and fast.",
"dev": "`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), Lithostitched's limited and guaranteed elements with pool and processor modifiers (#1777), its processors as the game's own types (#1765). Proved by the structure blocks and layout harnesses (#1753, #1757). Mods whose Java code does more than world generation don't run (docs/modpacks.md).",
"links": [
"#1746",
"#1777",
"#1765",
"#1753",
"#1757",
"docs/modpacks.md"
],
"focus": true,
"announce": true
},
{
"id": "server-clients",
"title": "Playing on servers: everything shows as it should",
"status": "now",
"area": "servers",
"plain": "When you play on a server, other players, mobs, items and menus look and behave as in vanilla: skins, poses, item names, inventories and server networks.",
"dev": "Client-of-a-server fixes in `game/remote*.rs` and `horizon-protocol`: mobs' aggressive and item-use flags (#1802, #1798), ghost items after a remote menu (#1795), skins (#1652), cookies and transfer packets for proxy networks (#1650), firework boosts (#1671), living-entity attributes and simulation distance (#1731), styled item names (#1702), primed TNT between updates (#1710).",
"links": [
"#1802",
"#1798",
"#1795",
"#1652",
"#1650",
"#1671",
"#1731",
"#1702",
"#1710"
],
"focus": true,
"ongoing": true
},
{
"id": "server-thread",
"title": "Single player as a server: the last differences",
"status": "now",
"area": "gameplay",
"plain": "Single player now runs a small server in the background, as vanilla does. We are fixing what still behaves differently there; every fix also works for LAN and server players.",
"dev": "Since #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), potions keep their potion over the connection (#1796), mobs' aggression and arm swings (#1802). docs/server-levels.md.",
"links": [
"#1514",
"#1797",
"#1796",
"#1802",
"docs/server-levels.md"
],
"focus": true,
"ongoing": true
},
{
"id": "mod-registry",
"title": "Horizon's mod registry",
"status": "now",
"area": "mods",
"plain": "One place for mods, modpacks and resource packs made for Horizon: browse them on the website and install them from the launcher in one click.",
"dev": "Merged: the registry index (schema 1, `.hpack`, checks before install, #1634), `cargo horizon-mod check` (#1642) and the submission service (`crates/horizon-mod-registry`, #1659). In review: the website's /mods (#1596) and /mods/submit (#1635), and in the launcher the registry as a source (#1636), install, enable and takedowns (#1637), the Mods page (#1638) and modpacks as their own profiles (#1640).",
"links": [
"#1634",
"#1642",
"#1659",
"#1596",
"#1635",
"#1636",
"#1637",
"#1638",
"#1640",
"docs/mods.md"
],
"focus": true,
"announce": true
},
{
"id": "server-dialogs",
"title": "Server dialogs and login screens",
"status": "now",
"area": "servers",
"plain": "Servers that show dialogs, such as the register and login screens of AuthMe, will work in Horizon.",
"dev": "26.3's dialog packets and model (#1720), the dialog screen with its buttons and actions (#1734), then text and boolean inputs (#1735).",
"links": [
"#1720",
"#1734",
"#1735"
]
},
{
"id": "languages",
"title": "Play in your language",
"status": "now",
"area": "gameplay",
"plain": "Item names, container titles and server messages follow the language you pick, as in vanilla. Today parts of the game stay in English.",
"dev": "Translatable components resolved through the selected language for items, containers and server text (#1806), on top of the bundled languages the prepared resources carry (#1594). Left: the client's own screens (#1672) and the main menu with zh_cn (#1774).",
"links": [
"#1806",
"#1594",
"#1672",
"#1774"
]
},
{
"id": "shader-packs",
"title": "Shader packs, written again from scratch",
"status": "now",
"area": "rendering",
"plain": "Shader packs were removed and are being rebuilt from scratch. They come back, off by default, once the best-known packs draw properly.",
"dev": "A clean-room rewrite in `horizon-shaderpack`, from the packs' public format documentation only: reading packs, the preprocessor and `.properties` files are merged (#1584, #1585, #1586); translating programs to WGSL through naga, buffers, uniforms and the terrain, entity, sky, weather and hand stages are in review (#1698 to #1801).",
"links": [
"#1561",
"#1584",
"#1586",
"#1698",
"#1771",
"#1786",
"#1801"
],
"ongoing": true
},
{
"id": "discord-presence",
"title": "Discord Rich Presence",
"status": "now",
"area": "extras",
"plain": "Your Discord profile can show that you are playing Horizon, with a switch to turn it off.",
"dev": "A Discord IPC client on its own thread (#1787) and the presence with its setting (#1788). Merged: it ships with the next release.",
"links": [
"#1787",
"#1788"
],
"announce": true
},
{
"id": "lean-code",
"title": "A leaner codebase that builds faster",
"status": "now",
"area": "project",
"plain": "Cleaning up Horizon's code: removing what nothing uses and making it quicker to build, so fixes and new features land faster.",
"dev": "A review of the whole tree: dead code and stubs removed (#1432, #1658), one probe binary per crate (#1453, #1454), shared harness helpers (#1448), clippy clean on the whole tree (#1707). docs/architecture.md maps each feature to its files and harnesses.",
"links": [
"#1432",
"#1658",
"#1453",
"#1454",
"#1448",
"#1707",
"docs/architecture.md"
],
"ongoing": true
},
{
"id": "microsoft-sign-in",
"title": "Microsoft sign-in (coming soon)",
"status": "next",
"area": "launcher",
"plain": "Coming soon: sign in with your Microsoft account to play on online-mode servers. The code is ready; it waits for Microsoft's approval.",
"dev": "Device-code sign-in in the launcher and online-mode login in the client (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\".",
"links": [
"docs/microsoft-account.md",
"#1270"
],
"announce": true
},
{
"id": "curseforge",
"title": "CurseForge in the mod browser (coming soon)",
"status": "next",
"area": "modpacks",
"plain": "Coming soon: search and download CurseForge mods and modpacks from the launcher, as you can with Modrinth today.",
"dev": "The mod browser lists CurseForge as coming soon (docs/mod-browser.md): it needs CurseForge API access. Meanwhile packs import from a CurseForge zip or instance folder, and jars only CurseForge hosts come from the player's own instance (docs/modpacks.md).",
"links": [
"docs/mod-browser.md",
"docs/modpacks.md"
],
"announce": true
},
{
"id": "benchmarks",
"title": "Fresh benchmarks against vanilla",
"status": "next",
"area": "performance",
"plain": "New public numbers comparing Horizon with vanilla on many kinds of computers, measured the same way every time, on the website's Benchmarks page.",
"dev": "Redo the comparison after the current performance work (#1073); reliability, coverage and presentation (#1346); a scene must count as loaded only once its first chunk arrives (#1749). Players' reports come in through `--benchmark` and `horizon-launcher data benchmark` (docs/benchmark.md).",
"links": [
"#1073",
"#1346",
"#1749",
"docs/benchmark.md"
]
},
{
"id": "pistons-push",
"title": "Pistons push players and mobs",
"status": "next",
"area": "gameplay",
"plain": "Pistons and slime blocks will push players, mobs and items as in vanilla. Today moving blocks pass through them.",
"dev": "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, #1609, #1608, #1704, #1758.",
"links": [
"#1496",
"#1609",
"#1608",
"#1704",
"#1758"
]
},
{
"id": "intel-mac",
"title": "Horizon on Intel Macs",
"status": "next",
"area": "launcher",
"plain": "Builds of the game and the launcher for Macs with an Intel processor.",
"dev": "x86_64 game and launcher builds, picked per processor (#1171). Before it ships it needs a run on a real Intel Mac: Rosetta on Apple Silicon only proves the CPU code. Requests: #1161, #1792.",
"links": [
"#1171",
"#1161",
"#1792"
]
},
{
"id": "ai-companion",
"title": "An optional AI teammate",
"status": "later",
"area": "extras",
"plain": "An AI teammate that plays beside you and that you can talk to. It is off unless you turn it on, and the No AI switch hides it completely.",
"dev": "Draft pull requests: the companion (#1068), its safety modes and their evaluation (#1069), and a route that finishes the game (#1070). Local models first; it ships only once the safety evaluation passes.",
"links": [
"#1068",
"#1069",
"#1070"
]
},
{
"id": "new-versions",
"title": "Following new Minecraft versions",
"status": "later",
"area": "gameplay",
"plain": "When Mojang releases a new version of the game, Horizon follows it, and every system is checked against the new version again.",
"dev": "The port pipeline detects a release, diffs its classes against 26.3 and writes a port report (docs/version-ports.md); the harnesses then run against the new version.",
"links": [
"docs/version-ports.md"
]
},
{
"id": "benchmark-your-pc",
"title": "Benchmark your computer",
"status": "help-wanted",
"area": "performance",
"plain": "Run Horizon's built-in benchmark and share the report: every new computer makes the performance work more accurate. No coding needed.",
"dev": "`horizon-launcher play --arg=--benchmark --arg=standard` writes a JSON report; `horizon-launcher data benchmark <report>` shows what would be sent and uploads it (website/docs/performance.md). Results from three installs with the same hardware appear on the Benchmarks page. Example: #1711.",
"links": [
"website/docs/performance.md",
"#1711"
]
},
{
"id": "end-city-banners",
"title": "End city banners keep their pattern",
"status": "help-wanted",
"area": "gameplay",
"plain": "Banners in End cities show as plain magenta instead of with their pattern.",
"dev": "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; possibly related: #526.",
"links": [
"#1438",
"#526"
]
},
{
"id": "end-city-loot",
"title": "Enchanted loot in End cities",
"status": "help-wanted",
"area": "gameplay",
"plain": "Armour and tools in End city chests should come enchanted, as in vanilla.",
"dev": "`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, #1660.",
"links": [
"#1437",
"#1660"
]
},
{
"id": "item-cooldowns",
"title": "Cooldowns drawn on items",
"status": "help-wanted",
"area": "gameplay",
"plain": "After you throw an ender pearl, its slot should show the cooldown sweeping away, as in vanilla.",
"dev": "Vanilla draws `ItemCooldowns`' percent as a white overlay over the slot (`GuiGraphicsExtractor.itemDecorations` and `itemCooldown`) in the hotbar and in inventories. Issue #1763.",
"links": [
"#1763"
]
},
{
"id": "chat-settings",
"title": "Chat settings and team prefixes",
"status": "help-wanted",
"area": "gameplay",
"plain": "The Hidden and Commands Only chat settings should hide chat, and team prefixes should appear before names in chat.",
"dev": "Vanilla checks `ChatVisiblity` before it delivers chat and system messages (#1376), and chat uses the team-formatted display name (#1378). Both issues have exact steps to reproduce.",
"links": [
"#1376",
"#1378"
]
},
{
"id": "pointer-hand",
"title": "A pointing hand over buttons",
"status": "help-wanted",
"area": "gameplay",
"plain": "The mouse pointer should turn into a pointing hand over menu buttons, as in vanilla 26.3.",
"dev": "26.3's `AbstractWidget` asks for a cursor from `CursorTypes` when it is hovered; winit's `CursorIcon::Pointer` gives the same shape. Issue #1347.",
"links": [
"#1347"
]
},
{
"id": "text-field-keys",
"title": "Ctrl+Backspace and scroll bars in menus",
"status": "help-wanted",
"area": "gameplay",
"plain": "Ctrl+Backspace should delete a whole word in the creative search, and every list's scroll bar should be draggable.",
"dev": "`EditBox` deletes by word with Ctrl (#1764); the Game Rules and Statistics lists' scroll bars can't be dragged (#1782, after #978).",
"links": [
"#1764",
"#1782"
]
},
{
"id": "chicken-flap",
"title": "Chickens flap while they fall",
"status": "help-wanted",
"area": "gameplay",
"plain": "Chickens should flap their wings while they fall, not stand still in the air.",
"dev": "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.",
"links": [
"#1706"
]
},
{
"id": "server-resource-packs",
"title": "Server resource packs",
"status": "shipped",
"area": "servers",
"plain": "Servers can send you their resource pack: Horizon asks, downloads it and applies it, like vanilla.",
"dev": "The dedicated server offers server.properties' pack (#1562); the client's pack manager, downloads, prompt and Server Resource Packs setting (#1569, #1570).",
"links": [
"#1562",
"#1569",
"#1570"
],
"shipped_in": "v0.2.48"
},
{
"id": "server-thread-default",
"title": "Single player on its own server thread",
"status": "shipped",
"area": "gameplay",
"plain": "Single player runs on a server thread, as vanilla does, so the world keeps ticking smoothly while the window draws.",
"dev": "`game/integrated.rs` runs a second `Game` with one level per dimension; the window joins it through memory like a LAN guest (#1514).",
"links": [
"#1514",
"docs/server-levels.md"
],
"shipped_in": "v0.2.39"
},
{
"id": "metal-occlusion",
"title": "GPU occlusion culling on Macs",
"status": "shipped",
"area": "performance",
"plain": "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.",
"dev": "GPU occlusion culling on Metal (#1434).",
"links": [
"#1434"
],
"shipped_in": "v0.2.17"
},
{
"id": "gpu-animated-textures",
"title": "Animated textures on the GPU",
"status": "shipped",
"area": "performance",
"plain": "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.",
"dev": "Frames uploaded once, no per-tick CPU blend or copy (#1239).",
"links": [
"#1239"
],
"shipped_in": "v0.2.5"
},
{
"id": "far-detail",
"title": "Far Detail for integrated graphics",
"status": "shipped",
"area": "performance",
"plain": "An optional Reduced setting for far terrain, suggested on integrated graphics, that saves 2 to 4 ms of GPU time per frame.",
"dev": "Opt-in reduced far terrain (#1199), on far-terrain chunk summaries built on the workers (#1029).",
"links": [
"#1199",
"#1029"
],
"shipped_in": "v0.2.5"
},
{
"id": "mod-browser",
"title": "The launcher's mod browser",
"status": "shipped",
"area": "modpacks",
"plain": "Search Modrinth for mods, modpacks and resource packs from the launcher; it says before installing what works in Horizon.",
"dev": "The Mods page (#1154), Java mods checked before install (#1242), project pages, filters and galleries (#1243), modpacks ported in the same step (#1246). docs/mod-browser.md.",
"links": [
"#1154",
"#1242",
"#1243",
"#1246",
"docs/mod-browser.md"
],
"shipped_in": "launcher@0.2.0"
},
{
"id": "launcher-look",
"title": "A blocky, Minecraft-like launcher",
"status": "shipped",
"area": "launcher",
"plain": "The launcher got a new blocky look in Horizon's purple, in dark and light.",
"dev": "The Blocks look (#1269), from `horizon-theme` (docs/design-system.md).",
"links": [
"#1269",
"docs/design-system.md"
],
"shipped_in": "launcher@0.2.0"
},
{
"id": "dynamic-lights",
"title": "Dynamic lights",
"status": "shipped",
"area": "extras",
"plain": "An optional extra: torches you hold, drop or set on fire light up what is around them.",
"dev": "Held, dropped and burning light sources (#1162), in Horizon Extras, off by default.",
"links": [
"#1162"
],
"shipped_in": "v2026.10.22"
},
{
"id": "servers-page",
"title": "Host a server from the launcher",
"status": "shipped",
"area": "servers",
"plain": "The launcher's Servers page creates, starts, backs up and updates a Horizon server with buttons, and invites friends.",
"dev": "The launcher's Servers page (#1026) over `horizon-server` (docs/hosting.md).",
"links": [
"#1026",
"docs/hosting.md"
],
"shipped_in": "launcher-v0.15.0"
}
],
"journal": [
{
"week": "2026-43",
"date": "2026-10-19",
"title": "Single player becomes a server, servers send their packs",
"plain": "Single player now runs on its own server thread, as vanilla does, and a run of fixes made shields, tridents, elytra, maps, fishing, signs and books work there and for every server player. Servers can send you their resource packs, the launcher got its blocky new look, and the first pieces of Horizon's mod registry landed. Shader packs were taken out, to come back written from scratch.",
"dev": "The server thread became the default (#1514), after guests and server-thread players reached parity: totems (#1463), death drops (#1464), signs and books (#1465, #1466), shields, tridents, crossbows and spyglasses (#1476), elytra (#1475), maps (#1510), fishing (#1509), wind charges (#1508), strikes and mob effects (#1512), the cursor stack on close (#1513). Server resource packs: the dedicated server offers them (#1562) and the client downloads, asks and applies them (#1569, #1570). Mod registry: index schema 1 and `.hpack` (#1634), `cargo horizon-mod check` (#1642), the submission service (#1659). Shader packs were removed (#1561) and the clean-room rewrite started from the format's documentation (#1584 onward). Releases now ship in batches of five pull requests, or six hours after the oldest (#1554)."
}
]
}
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