led2/.planning/phases/01-foundation/01-01-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
01-foundation	01	backend	python fastapi pydantic uvicorn websocket nginx terminal-ui		Python package lightsync/ with all backend modules Pydantic v2 DeviceConfig and ShowModel with full schema BaseDevice ABC + SK6812/WS2801 concrete implementations DeviceRegistry with JSON persistence (devices.json) ShowStore with JSON save/load (shows/ directory) FastAPI app with lifespan, REST stubs, WebSocket stub Terminal-aesthetic frontend shell (DAW skeleton) python -m lightsync entry point serving on port 8000	phase-01-02 phase-02 phase-03 phase-04 phase-05 phase-06 phase-07	added patterns FastAPI 0.115+ — web framework, REST, WebSocket, StaticFiles uvicorn[standard] 0.34+ — ASGI server with WebSocket support Pydantic v2 — model validation and JSON serialization aiofiles 24+ — async file I/O for show JSON and device registry python-dotenv — HOST/PORT config from .env file structlog — structured logging hatchling — build backend for pyproject.toml lifespan context manager for startup/shutdown (replaces deprecated @app.on_event) Module-level registry/show_store refs in main.py — accessed via `import lightsync.main as state` StaticFiles LAST — API routes registered before mount to prevent catch-all interception Pydantic v2 APIs: model_dump_json(), model_validate_json(), model_validate() — never v1 .json()/.parse_obj() BaseDevice ABC + _DEVICE_CLASSES dict — adding new strip type = new file + one dict entry (INF-02) pathlib.Path throughout — cross-platform safe file paths aiofiles for all file I/O in async contexts — non-blocking	created modified pyproject.toml .env .gitignore lightsync/__init__.py lightsync/__main__.py lightsync/main.py lightsync/models/__init__.py lightsync/models/device.py lightsync/models/show.py lightsync/devices/__init__.py lightsync/devices/base.py lightsync/devices/sk6812.py lightsync/devices/ws2801.py lightsync/devices/registry.py lightsync/store/__init__.py lightsync/store/show_store.py lightsync/api/__init__.py lightsync/api/devices.py lightsync/api/shows.py lightsync/api/ws.py lightsync/frontend/index.html lightsync/frontend/style.css lightsync/frontend/app.js	aiofiles for all JSON file I/O — keeps async handlers non-blocking per research guidance Module-level state in main.py for registry/show_store — acceptable for Phase 1, Phase 2 migrates to Depends() StaticFiles mounted last — required to prevent catch-all interception of /api/* routes encode_animation_cmd stubs return b'' — Phase 3 implements real UDP animation command encoding .gitignore excludes devices.json and shows/ — these are runtime data, not source	lifespan context manager for app startup/shutdown BaseDevice ABC + _DEVICE_CLASSES registry dict for extensible device type system Pydantic v2 serialization patterns (model_dump_json, model_validate_json) aiofiles for async file I/O in FastAPI route handlers CSS custom properties for terminal aesthetic — all colors via :root vars	INF-01 INF-02 DEV-01 DEV-02 SHW-01 SHW-02	4min	2026-04-05

Phase 1 Plan 01: Backend Scaffold Summary

FastAPI backend scaffold with Pydantic v2 models, device ABC, JSON persistence stores, REST+WebSocket stubs, and terminal-aesthetic DAW skeleton frontend — all runnable via python -m lightsync

Performance

• Duration: ~4 min
• Started: 2026-04-05T18:43:46Z
• Completed: 2026-04-05T18:48:03Z
• Tasks: 2 (both auto)
• Files created: 23

Accomplishments

Task 1: Package structure, Pydantic models, device abstractions (commit: 061edfc)

• pyproject.toml with all Phase 1 dependencies (FastAPI, uvicorn, Pydantic v2, aiofiles, structlog)
• lightsync/models/device.py — DeviceConfig Pydantic model with StripType literal, UUID auto-ID, validation constraints
• lightsync/models/show.py — ShowModel with schema_version=1, AudioRef, TrackModel, CueModel, AnalysisBlock
• lightsync/devices/base.py — BaseDevice ABC with encode_frame, encode_animation_cmd, bytes_per_pixel
• lightsync/devices/sk6812.py — SK6812 RGBW (4 bytes/pixel), encode_frame builds RGBW bytearray
• lightsync/devices/ws2801.py — WS2801 RGB (3 bytes/pixel), encode_frame builds RGB bytearray

Task 2: Registry, show store, FastAPI app, frontend shell (commit: 5e10272)

• lightsync/devices/registry.py — DeviceRegistry with _DEVICE_CLASSES dict, load/save (aiofiles), add/remove/get/list_all/instantiate
• lightsync/store/show_store.py — ShowStore with async save/load, list_ids() via glob
• lightsync/main.py — create_app() with lifespan hook, API routes registered before StaticFiles mount
• lightsync/api/devices.py — GET /, POST /, DELETE /{id} — full CRUD with save-on-write
• lightsync/api/shows.py — GET /, POST /, GET /{id} — create and retrieve shows
• lightsync/api/ws.py — ConnectionManager + /ws WebSocket endpoint with ack echo
• lightsync/frontend/index.html — DAW skeleton: header, sidebar (DEVICES + ANIMATIONS), TIMELINE main area, TRANSPORT footer
• lightsync/frontend/style.css — Terminal aesthetic: #0a0a0a bg, #00ffff cyan accent, border-radius: 0 everywhere, CSS Grid layout
• lightsync/frontend/app.js — LightSyncClient WS with reconnect, loadDevices() populating device list
• .gitignore — excludes runtime data (devices.json, shows/), .venv/, __pycache__/

Verification Results

All verification checks passed:

• pip install -e ".[dev]" — installs successfully
• python -c "from lightsync.models.show import ShowModel; s = ShowModel(name='test'); assert s.schema_version == 1" — passes
• python -c "from lightsync.devices.registry import DeviceRegistry; print('OK')" — passes
• python -m lightsync — starts server on port 8000, serves GET /api/devices/ → 200 []

Task Commits

Task	Commit	Description
1	061edfc	Package structure, Pydantic models, device abstractions
2	5e10272	Registry, show store, FastAPI app, frontend shell

Decisions Made

• Module-level registry and show_store refs in main.py — acceptable for Phase 1 single-process server; Phase 2 should migrate to Depends() for testability
• encode_animation_cmd stubs in SK6812/WS2801 return b"" — Phase 3 implements real UDP frame encoding
• Google Fonts (JetBrains Mono) loaded from CDN — offline fallback to Consolas via CSS custom property chain

Deviations from Plan

None — plan executed exactly as written.

Known Stubs

These are intentional per-plan stubs, documented in the plan spec:

Stub	File	Line	Reason
encode_animation_cmd returns b""	lightsync/devices/sk6812.py	28	Phase 3 implements real UDP animation command encoding
encode_animation_cmd returns b""	lightsync/devices/ws2801.py	26	Phase 3 implements real UDP animation command encoding
ANIMATIONS panel placeholder	lightsync/frontend/index.html	—	Phase 3+ per design decision D-08
TIMELINE panel placeholder	lightsync/frontend/index.html	—	Phase 2+ per design decision D-09
TRANSPORT bar placeholder	lightsync/frontend/index.html	—	Phase 2+ per design decision D-10

All stubs are DAW skeleton placeholders (per D-06 decision: full panel layout from day 1) or device encoding stubs for UDP (Phase 3). They do not prevent the plan's goal from being achieved — the backend scaffold, persistence, and server entry point are fully functional.

Next Phase Readiness

• Ready for 01-02: frontend UI details and static file serving verification
• Ready for 01-03: Docker deploy to groll.cloud
• All future phases can import from lightsync.models, lightsync.devices, lightsync.store
• _DEVICE_CLASSES dict ready to receive new strip types in Phase 5

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Phase: 01-foundation Completed: 2026-04-05