led2/.planning/STATE.md

gsd_state_version, milestone, milestone_name, status, stopped_at, last_updated, last_activity, progress

gsd_state_version	milestone	milestone_name	status	stopped_at	last_updated	last_activity	progress
1.0	v1.0	milestone	executing	Completed 03-communication-protocol/03-02-PLAN.md	2026-04-06T21:48:33.912Z	2026-04-06	total_phases completed_phases total_plans completed_plans percent 7 2 10 9 0

Project State

Project Reference

See: .planning/PROJECT.md (updated 2026-04-05)

Core value: Load a song, build a synchronized light show, play it back live — with precise control over every effect on every device. Current focus: Phase 03 — communication-protocol

Current Position

Phase: 03 (communication-protocol) — EXECUTING Plan: 3 of 3 Status: Ready to execute Last activity: 2026-04-06

Progress: [░░░░░░░░░░] 0%

Performance Metrics

Velocity:

• Total plans completed: 0
• Average duration: —
• Total execution time: 0 hours

By Phase:

Phase	Plans	Total	Avg/Plan
-	-	-	-

Recent Trend:

• Last 5 plans: —
• Trend: —

Updated after each plan completion | Phase 01-foundation P01 | 4 | 2 tasks | 23 files | | Phase 01-foundation P03 | 6 | 1 tasks | 9 files | | Phase 01 P04 | 2 | 2 tasks | 3 files | | Phase 02-audio-engine P01 | 525603 | 2 tasks | 5 files | | Phase 02-audio-engine P02 | 8 | 2 tasks | 3 files | | Phase 02-audio-engine P03 | 8min | 2 tasks | 5 files | | Phase 02-audio-engine P03 | 4 | 9 tasks | 8 files | | Phase 03-communication-protocol P01 | 4min | 2 tasks | 8 files | | Phase 03-communication-protocol P02 | 3min | 1 tasks | 10 files |

Accumulated Context

Decisions

Decisions are logged in PROJECT.md Key Decisions table. Recent decisions affecting current work:

• Init: Web UI over TUI — richer DAW interactions while keeping terminal aesthetic via CSS
• Init: python-mpv-jsonipc preferred over ctypes binding — no libmpv.dll dependency on Windows
• Init: Firmware deferred to Phase 7 — protocol must be validated against simulator first
• Init: undo/redo built in Phase 4 — retrofitting command pattern is expensive
• [Phase 01-foundation]: Module-level state in main.py for registry/show_store — acceptable for Phase 1, Phase 2 migrates to Depends()
• [Phase 01-foundation]: StaticFiles mounted last in create_app() — prevents catch-all interception of /api/* routes
• [Phase 01-foundation]: encode_animation_cmd stubs return b'' — Phase 3 implements real UDP animation command encoding
• [Phase 01-foundation]: redirect_slashes=False on FastAPI — StaticFiles at root intercepted API redirects
• [Phase 01-foundation]: API collection routes use empty-string paths ('') not '/' — canonical /api/devices without redirect
• [Phase 01]: window.removeDevice export required for ES module onclick compatibility — functions in type=module scripts are not global
• [Phase 01]: CSS accent variable canonical naming: --accent is source of truth, aliases are text-accent and border-bright
• [Phase 02-audio-engine]: MPV_AO env var controls audio output — null default for Docker server mode, overridable for local dev
• [Phase 02-audio-engine]: 10Hz polling via time.sleep(0.1) over observe_property — observe_property fires per audio frame overwhelming asyncio
• [Phase 02-audio-engine]: apply_timer_fix() as Linux no-op — timeBeginPeriod is Windows-only; INF-03 satisfied as platform-guarded stub
• [Phase 02-audio-engine]: broadcast_loop accepts get_engine callable instead of direct import — avoids ws.py/main.py circular import
• [Phase 02-audio-engine]: asyncio.to_thread for engine.load in REST endpoint — python-mpv-jsonipc load is synchronous, must not block event loop
• [Phase 02-audio-engine]: AUD-02 (YouTube URL loading) deferred to Phase 6 — noted in docstring, not implemented in audio.py
• [Phase 02-audio-engine]: ffmpeg subprocess pipe for MP3 waveform extraction (libsndfile/soundfile does not support MP3 natively)
• [Phase 02-audio-engine]: Transport state driven by WebSocket tick — no frontend polling
• [Phase 02-audio-engine]: Browser plays audio via HTML5 audio element — eliminates python-mpv, Docker libmpv dependency, and server-side position polling
• [Phase 02-audio-engine]: librosa.beat.beat_track for beat detection — tempo + beat grid in one call, cached in app.state.beats by filepath
• [Phase 03-communication-protocol]: TDD approach for protocol encoders: tests committed RED before implementation, ensuring coverage is meaningful
• [Phase 03-communication-protocol]: 0xAC animation command marker chosen well above WLED 0x01-0x04 range — no firmware collision
• [Phase 03-communication-protocol]: UDPSender uses single shared asyncio DatagramTransport — no socket pool needed for UDP multi-device sends
• [Phase 03-communication-protocol]: Chase reverse test uses offset-not-multiple-of-period for reliable assertion
• [Phase 03-communication-protocol]: FireAnimation lazy-initializes heat array per led_count to support variable strip lengths

Pending Todos

None yet.

Blockers/Concerns

• Phase 2: python-mpv-jsonipc latency on Windows 11 under load is unbenchmarked — validate with timing harness in 02-01
• Phase 4: librosa MP3 loading path on Windows needs explicit validation (soundfile falls back to audioread which requires FFmpeg on PATH)
• Phase 6: AI sync approach (LLM-assisted) has no reference implementation — treat as spike, not commitment

Session Continuity

Last session: 2026-04-06T21:48:33.906Z Stopped at: Completed 03-communication-protocol/03-02-PLAN.md Resume file: None

Next action: /gsd:plan-phase 1