The Mods page gains a Data packs tab: Modrinth's data packs for 26.3,
each marked Partly with what Horizon runs of a data pack today
(functions, function tags, predicates, item modifiers). Install puts the
project's data pack file (not its mod build), checksum checked, into the
datapacks/ of a world picked on the tab, and says what of that zip runs
and what isn't read yet. A pack with nothing Horizon runs (worldgen
only) is refused. The world's list on Home shows it.
CLI and MCP: `mods search --kind datapack`, `mods install <pack> --world
<world>`.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Mods page and `mods` commands installed everything into the default
game folder whichever instance was picked. Mods, resource packs and
shader packs now go into the selected instance's folder, and the
Installed list, updates, Remove and the mod switches are that
instance's; picking another instance reads its list. The page says which
instance it installs into when there are several. `mods list|install|
update|remove|enable|disable` take `--instance` (default: the selected
one). Java mods' checks stay shared in the default folder for the
search results.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
datapacks.rs lists a world's datapacks/ (zips and folders with
pack.mcmeta, as the game discovers them; off when datapacks.json lists them
disabled), adds a data pack zip under a free name (refusing resource packs:
no data/ folder) and removes one to the trash, forgetting it in
datapacks.json. The game turns a new pack on when the world opens.
Home: each world gets "Data packs", which opens its packs under the row
with Add data pack… and Remove; a zip dropped on a world goes into it.
CLI: `worlds datapack-list|datapack-add|datapack-remove <world>`;
datapack-remove needs confirm over MCP.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Mods page's Installed list gets "Update all (N)" when newer versions
were found: every pack with one is updated in turn on a thread (each
download checked as an install is), with "1 of 2: …" progress, and one that
fails is named without stopping the others. The CLI already does this with
`mods update` and no pack name (MCP: mods_update).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
packs.rs lists an instance's resource packs (resourcepacks/, a .zip or a
folder with pack.mcmeta) and shader packs (shaderpacks/: Horizon's own and
the shaders/ format, as the game's Shader Packs page lists them), and turns
them on or off the game's own way: resourcePacks in options.txt (a pack
turned on goes on top) and pickedShaderPack in horizon-graphics.txt (one at
a time); every other line of both files stays. add() copies a dropped file
into the right folder under a free name; remove() turns it off and moves it
to the trash.
CLI: `packs [list|add|on|off|remove] [--kind] [--instance]`; `packs remove`
needs confirm over MCP.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Home shows the selected instance's newest screenshots (what F2 saves in its
screenshots/ folder), all of them on request, and opens one over the window
with Newer/Older (and the arrow keys), Copy (the picture to the clipboard),
Open, Show in folder and Delete (to the trash, after a confirmation).
CLI: `screenshots [list|delete] [--instance]`; `screenshots delete` needs
confirm over MCP. worlds::to_trash is shared by worlds and screenshots.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Each world on Home gets Play (the game starts with --world <folder>), and
Home lists the selected instance's servers from the game's own servers.dat:
Join starts the game with --server <address>, Add server and Remove change
the file. server_list reads and writes it as vanilla's ServerList does
(uncompressed NBT, a new file then servers.dat_old) and writes every entry
back with all its fields, the hidden Direct Connection ones too.
CLI: `multiplayer [list|add|remove] [--instance]`, `play --server`;
MCP: play takes `server`; `multiplayer remove` needs confirm.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Home lists the selected instance's worlds from their level.dat (name, mode,
version, last played) with their size and picture. Back up zips one into
backups/ as vanilla's Make Backup does; Copy makes "<name> (1)" with that
name in its level.dat; Delete moves it to the system's trash after a
confirmation (the file manager call on macOS, no Finder permission);
Open folder. `horizon-launcher worlds list|backup|copy|delete`, and their
MCP tools (delete needs confirm). level.dat is read with horizon-world's NBT.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
An instance plays the launcher's version, which follows updates, unless it is
kept on another installed one: the Play page's picker pins the selected
instance (picking the version marked "follows updates" unpins it), and
`instance version <instance> <tag|latest>` does it from the CLI. play,
`play --instance` and MCP play use the pin; a pack's Play uses its instance's.
The sidebar shows a pinned instance's version, or that it is not installed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The game's folder stays the default instance, "Horizon", where it is; imported
and registry modpacks are listed as instances in their own folders; new ones
go to instances/<slug>/ in the game's folder, empty (the player's options and
offline name) or a copy of another (never sessions, logs or telemetry). Names,
icons and groups live in the launcher's instances.json, so nothing moves.
Play, `play --instance` and MCP play start the selected instance, which
follows the launcher's data collection answer and No AI. Crash reports are
read from the run's own folder.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
🤖 Agent: #2318 has merged and this PR's base is main. The official Recipes mod (needs API level 6): pr_ready --quick green; the e2e passes 25/25 in-frame and on a dedicated server on this head (61 of 63 in five modes before; the 2 failures were #2501's bug, now merged). Queued at 92e3f496f.
🤖 Agent: #2306 has merged and this PR's base is main. recipes.place and recipes.give at API level 6, give cut to one stack. Sandbox (31), api_reference and clippy -D warnings pass; the actions e2e passed 58/58 in five modes. Queued at bd1436f16.
🤖 Agent: #2301 has merged and this PR's base is main. browser.set-recipes (with station tabs) at API level 6; sandbox (31), api_reference and clippy -D warnings pass. Queued at a373eea18.
A crate split reaches every harness (#2160: 352 harnesses, 71 min on a Mac
mini runner) and held the Mac mini's runners while other pull requests'
parity jobs queued for over an hour. With the full-parity label, the job
runs on the desktop's runner only (8 at a time) and waits for it while the
desktop is in use; its timeout is 300 min, since a job under way when
someone comes back goes on with 2 threads.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
🤖 Agent: #2284 has merged and this PR's base is main. browser is at API level 6 (recipes took 5). Sandbox (31, the UI guest at level 6), api_reference and clippy -D warnings pass. Queued at b836eea06.
🤖 Agent: #1895 has merged and this PR's base is main. Merged main: recipes moves to API level 5 (world took 4). Sandbox (30, including the level assertion), api_reference and clippy -D warnings on horizon-mods pass. Queued at b360e3c26.
The command ran on after remote.sh was stopped or its connection dropped,
holding the name's lock, and a game or daemon it left behind outlived the
run. It now runs in a scope named after the run (remote-<name>.scope),
stopped when the command ends, when the ssh session ends first, and before
the next run under that name.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The host fetches the commit from GitHub (nothing else is sent), keeps one
checkout and target per worktree, runs the command niced in its CI slice on
CPUs 4-7 with scratch homes, prepares vanilla data for harness commands as
CI does, and streams the output back. One run per name at a time; no lock
leaks into daemons the run starts.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
tools/parity_hosts.json's new `known_flaky` lists the harnesses that still flake for a cause not fixed yet,
each with its reason: dedicated_server (its Java client's 1.5 s step timer), remote_fireball (wall-clock
sampling) and world_reopen. One of them that fails runs once more from scratch, and a pass then counts.
Every retry prints a RETRIED line at the end of the run and in the CI job's summary, so a harness that
passes only on its retry stays visible on PR parity and parity-main alike. The existing fresh rerun of a
failure that reused oracle results is reported the same way. A known flaky harness skips that rerun and keeps
reusing oracle results, because flaking doesn't mean its cached oracle runs were wrong. Repeated runs
(--repeat, --flake-check) are never retried.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A head tested alone keeps failing harnesses that main already fixed. Since 10-25 evening, 9 of 21 failed PR
parity jobs failed only on such fixes: server_knockback (heads without #2114, 7 times), mob_ai's oracle heap
(without #2270), save_roundtrip (without #2212). #2160 needed 4 parity runs this way.
The job now merges main's current tip into the head and selects harnesses against that main commit, so only
the pull request's own changes count. A branch that doesn't change the runner scripts or the selection gets
main's, which replaces the two steps that copied main's vanilla-data.sh and parity.py in by hand. A head that
conflicts with main is tested alone, with a warning. The job summary names the main commit, and the check is
still `parity / parity` on the head.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Every item sits in the item panel beside the inventory and container
screens, with a search box (words in the name or id, @namespace, #tag).
R or a click shows an item's recipes, U or a right click its uses, with a
tab per station; Back returns through the pages. + beside a crafting
recipe the player knows fills the grid as the recipe book does. In
creative mode, with "Click gives items" on, a click gives one item and a
right click a stack. The keys are rebindable in Controls.
Written from vanilla 26.3's recipe book and screens and Horizon's design
system only. On servers that are not Horizon it shows the game's own
26.3 recipes; known recipes and + follow the server's recipe book.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
As the creative inventory does: a count over the item's stack size (64, 16
or 1) is cut to it, so a mod can ask for a full stack without knowing it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
recipes.place(book-id, all) is the recipe book's click: in the open
inventory's or crafting table's grid it sends ServerboundPlaceRecipePacket
on a server, or places it in this world, refused as handlePlaceRecipe
refuses it (no crafting screen, a recipe the player's book doesn't hold, an
impossible one); a recipe missing items shows as a ghost. recipes.give(stack)
gives a creative player the stack as the creative inventory does; a server
hears it as SetCreativeModeSlot through the inventory's sync. Both answer at
once from the tick's snapshot (placing, creative, known) and take at most 36
calls a hook call.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A mod gives the recipes to show (a layout: crafting grid, cooking, single
input, smithing or brewing; the slots, each cycling through its stacks;
the results; a note; and an optional action button, enabled or greyed)
under a title; an empty list shows the items again. The game pages them
and sends the slot-clicked, action, page and back events.
At most 256 recipes, 9 slots each and 64 stacks a slot. Same level as the
rest of browser (5): none of it has shipped yet.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A new interface under capability ui. browser.set-items lists the items of
a panel the game shows right of the inventory and container screens (an
empty list hides it); browser.poll returns what the player did since the
last poll: a click on an item, the search text, or one of the mod's own
keys pressed over an item (a slot's or the panel's), with that stack. The
slot-clicked, action, page and back events are there now for the recipe
pages to come, since adding variant cases later would break mods.
At most 8192 items and 256 waiting events. The game side is the next PR.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
🤖 Agent: merged main to resolve a conflict in game/remote.rs (main's boss-overlay reset beside this PR's QuietCommands event; both kept). Clippy with mods on is clean. Requeued at the new head.
#2171 takes level 3 (command.run-quiet), so the world interface's functions
take level 4. The workspace members keep main's horizon-hdr and this branch's
beacons example.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
playhorizon.dev now deploys from the private ludovic111/horizon-site, which holds website/'s history. The files
its build still reads from here move out of website/:
- the design tokens to crates/horizon-theme/tokens.css (xtask tokens writes them, tokens_css_is_up_to_date checks them);
- the roadmap's JSON to roadmap/roadmap.json (tools/roadmap.py build);
- the benchmark fixtures to crates/horizon-telemetry-server/tests/fixtures/benchmarks/ (the site keeps a copy);
- the web icons to docs/media/brand/web/ (xtask icons).
pr_ready loses its website area and the tokens special case; rust_changes, the roadmap's links and every doc
that pointed into website/ follow.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
🤖 Agent: Sculk partner banner in the launcher (Servers and Home), as Ludovic asked. Launcher fmt, clippy -D warnings and tests pass; checked in dark and light on the Mac mini; verify passed on this head.
🤖 Agent: Gate check by Ludovic's AI agent (Claude). I merged main and added `crates/horizon-hdr` to the workspace, and pushed caae02641 so that native material packs keep a light-emitting translucent face (nether portal) at its own alpha. HDR stays off by default. With it off, screenshots match main within noise, and the frame time does too (A/B, two runs each: p50 0.326 to 0.329 ms vs 0.317 to 0.345 ms). `section_mesh` passes. HDR on was not tested here (no HDR display on the Mac mini). Thanks @senjinthedragon!
Sculk, a server host, sponsors Horizon. Its banner (a 50 KB WebP,
1200x441, bundled with include_bytes) sits under a muted "Partner"
label at the end of the Servers page and of Home, below Play. A click
opens https://my.sculkhosting.com/ref/horizon; hovering lifts it 2 px
and turns the label to ink; it is reachable with Tab.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
recipes.items() lists every item in registry order, with its name in the
player's language and its tags. recipes.all() lists every recipe: crafting
and furnace ones from the recipe book's own entries (vanilla's displays and
display ids), then campfire, stonecutting, smithing and brewing (display
only). Stacks point into the item table by index. recipes.known() gives the
book ids the player's recipe book holds, from the client book in every mode,
so on a server it follows the server's book.
The game builds the tables once, the first time a running mod reads them.
Experimental, new functions only. Smithing::Transform now keeps its recipe
id.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
🤖 Agent: Gate check by Ludovic's AI agent (Claude). The launcher contacts no new host: the existing requests (releases, Mojang files, Modrinth, CurseForge, the mod registry, pictures, Microsoft sign-in, Tailscale's API, modpack jars) now go through the player's HTTP proxy, or HTTPS_PROXY/HTTP_PROXY/ALL_PROXY when unset. Loopback and NO_PROXY hosts stay direct, and the Servers page's local API never uses the proxy. Tokens (Microsoft, Tailscale) only cross the proxy inside TLS (CONNECT), so the proxy can't read them, and none are logged. rdbt's NO_PROXY review is addressed: `horizon-port-pack`'s agents apply the same rules (`no_proxy_lists_hosts_and_their_subdomains`). On Linux at da54f988d: launcher lib tests 132 passed, `cargo clippy --all-targets -D warnings` clean, `horizon-port-pack` 68 tests passed and clippy clean. Labelled feature. One small note for later: an unusable proxy address is printed to stderr as typed, so a `user:pass@` in it would show in the log. Thanks @zhykowo!
Ludovic Marie