Files
Nitro_Render_V3/CLAUDE.md
T
simoleo89 ddb7222b66 chore: bump TypeScript pins to ^6.0.3 across all 12 workspaces + thumbmarkjs 1.9 + add CLAUDE.md
Each workspace package was still pinning `typescript: ~5.5.x` or
`~5.8.2` in its own devDependencies even though the root bumped to 6.0.3
in 60b1143. The pins were dead (yarn 1 hoists from root) but they're
misleading when reading a single package.json. Bring them all to
`^6.0.3` to match the root.

Other:
- @thumbmarkjs/thumbmarkjs 1.8.1 → 1.9.0 (root + communication package)
- yarn.lock regenerated from a clean install (vitest 4 hoisting was
  flaking on the patch vite bump; reverted vite to ^8.0.10)

Adds CLAUDE.md at the repo root: short project context for future
sessions — stack, the 12-workspace layout, the React-friendly v2.1.0
additions (`subscribe()`, `subscribeMessage()`, snapshot getters), build
scripts, and known gotchas (`SessionDataManager.getUserData` does NOT
exist; sendChat* expects 3 args; dispatchEvent is sync).
2026-05-10 21:29:50 +02:00

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# Nitro_Render_V3 — Claude project context
Pure-TypeScript renderer library for the Nitro retro Habbo client.
Wraps **PixiJS v8** for room/avatar rendering and provides the WebSocket
+ event-bus infrastructure that the React client (`../Nitro-V3`) sits on
top of.
## Stack
- **TypeScript 6.0** (root) + **tsgo** (`@typescript/native-preview`,
TS 7 preview compiler — used by `yarn compile:fast`, ~7× faster on
this codebase)
- **PixiJS v8** (`pixi.js@8.18`)
- **Vite 8** for build + bundling
- **Vitest 4** for unit tests
- **Yarn 1.22 workspaces** (`packages/*`) — note: yarn 1, NOT yarn 4 like
the client. The two repos use different package managers on purpose.
- **No React** — this is a pure TS library; React lives in `../Nitro-V3`.
## Workspace layout
Twelve internal packages under `packages/*/src/`, each pinning
`typescript: ^6.0.3` in its own `devDependencies`:
```
packages/
api public interfaces (IEventDispatcher, ISessionDataManager, ...)
assets asset loading + caching
avatar avatar rendering / figure resolution
camera in-room camera widget
communication WebSocket + composer/parser pipeline
configuration runtime config loader
events EventDispatcher + NitroEventType + per-domain events
localization LocalizationManager
room RoomEngine + RoomVisualization
session SessionDataManager + RoomSessionManager + handlers
sound SoundManager (howler-based)
utils shared utilities (BinaryReader, Logger, …)
```
Root `index.ts` re-exports everything from `@nitrots/*` so the React
client gets a flat `import { … } from '@nitrots/nitro-renderer'`.
## React-friendly API additions (v2.1.0)
Three additions matter for the React client integration. Keep these
backwards-compatible:
### `EventDispatcher.subscribe(type, callback): () => void`
Signature matches what `useSyncExternalStore` expects — returns an
unsubscriber, no need to juggle callback identity. Implemented in
`packages/events/src/EventDispatcher.ts`. The legacy
`addEventListener` / `removeEventListener` still work.
### `CommunicationManager.subscribeMessage(eventCtor, handler): () => void`
Equivalent for packet streams. Implemented in
`packages/communication/src/CommunicationManager.ts`.
### Snapshot getters on `SessionDataManager` + `RoomSessionManager`
```ts
getUserDataSnapshot(): Readonly<IUserDataSnapshot>
getActiveRoomSessionSnapshot(): Readonly<IRoomSessionSnapshot> | null
```
Returns **referentially-stable** values: the same object reference is
returned across reads until invalidated. Invalidation happens via the
new event types `NitroEventType.SESSION_DATA_UPDATED` and
`NitroEventType.ROOM_SESSION_UPDATED`.
When you mutate any field that the snapshot exposes, call the private
`invalidateUserDataSnapshot()` / `invalidateRoomSessionSnapshot()`
that drops the cached snapshot and dispatches the invalidation event.
The React side rebuilds via `useSyncExternalStore`.
The interface contracts live in:
- `packages/api/src/nitro/session/IUserDataSnapshot.ts`
- `packages/api/src/nitro/session/IRoomSessionSnapshot.ts`
## Scripts
```
yarn build # vite build
yarn compile # tsc --project ./tsconfig.json --noEmit false
yarn compile:fast # tsgo (~7× faster, TS 7 preview)
yarn eslint # lint src + packages/*/src
yarn test # vitest run
yarn test:watch # vitest watch
yarn test:coverage # vitest with v8 coverage
```
## Consumed by
`../Nitro-V3` consumes this library via `link:../Nitro_Render_V3`
(yarn 4 node-modules linker). DO NOT use `yarn link` — it confuses
vite's asset resolution. The client's `vite.config.js` then maps each
`@nitrots/*` package directly to its source `index.ts` so there's no
build step needed for development.
When making changes to renderer APIs the React client uses, the
client's `feat/react19-*` branches contain consumers — check
`Nitro-V3/src/hooks/events/` and `Nitro-V3/src/hooks/{session,rooms}/`
for the React-side bridge code.
## Gotchas
- **`SessionDataManager.getUserData(id)` does NOT exist.** Some legacy
code in the React client used it under a `getUserData ?` truthy guard;
the branch was always dead. Only `getUserDataSnapshot()` exists.
- `IRoomSession.sendChatMessage` / `sendShoutMessage` require **3 args**
(text, styleId, chatColour). The React client's chat-input legacy
passes 2 — known pre-existing gap, do not "fix" the client without
also threading chatColour through the chat composer pipeline.
- The renderer is **synchronous**: `EventDispatcher.dispatchEvent` is a
synchronous loop over listeners. Don't add `await` inside the
`processEvent` loop — it would change ordering guarantees that
consumers rely on.
- Workspace package devDeps pin TS at `^6.0.3` so `yarn compile` inside
any single package keeps working. The root TS 6 is the source of
truth.
## Sister projects in the same DEV folder
- `../Nitro-V3` — React 19 client (consumes this lib via link)
- `../Arcturus-Morningstar-Extended` — Java emulator (server side)
- `../NitroV3-Housekeeping` — Next.js + Prisma admin CMS