# W-012 Status

status: done
task: 建立 EngineClient 和 Worker 通信

## Evidence

- Client: `web/app/src/engine-client/EngineClient.ts`
- Worker: `web/app/src/workers/engine.worker.ts`
- Protocol: `web/protocol/engine.ts`, `web/protocol/scene-ir.ts`
- The browser status changes to `Mock Engine: r0` after init and snapshot.
- Screenshot: `tests/golden/W-012/mock-worker-1440x900.png`

## Verification

```text
npm run typecheck  # passed
npm run lint       # passed
npm run build      # passed
Chrome headless --virtual-time-budget=4000  # Mock Engine: r0
```