- UDPSender: single shared asyncio DatagramTransport, start/stop lifecycle, fire-and-forget send()
- _NullProtocol: swallows OS send errors (UDP delivery is best-effort for LEDs)
- SK6812Device.encode_animation_cmd: replaces b'' stub with real 16-byte 0xAC packet
- WS2801Device.encode_animation_cmd: replaces b'' stub with real 16-byte 0xAC packet
- Both devices delegate to encode_animation_cmd from lightsync.protocol.animation_cmd
- DeviceRegistry with load/save/add/remove/instantiate and _DEVICE_CLASSES dict
- ShowStore with save/load/list_ids using aiofiles for async I/O
- FastAPI app with lifespan hook (startup: load registry/store, shutdown: save registry)
- API routes: GET/POST /api/devices/, DELETE /api/devices/{id}, GET/POST /api/shows/, GET /api/shows/{id}
- WebSocket stub at /ws with ConnectionManager and ack echo
- Frontend shell: DAW layout with header, sidebar (DEVICES + ANIMATIONS), TIMELINE, TRANSPORT
- Terminal aesthetic: dark theme, cyan accents, monospace fonts, no drop shadows
- .gitignore for runtime data (devices.json, shows/, __pycache__, .venv)