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docs(phase-03): complete phase execution

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Claude
2026-04-06 21:55:48 +00:00
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.planning/STATE.md
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@@ -4,7 +4,7 @@ milestone: v1.0
milestone_name: milestone milestone_name: milestone
status: verifying status: verifying
stopped_at: Completed 03-communication-protocol/03-03-PLAN.md stopped_at: Completed 03-communication-protocol/03-03-PLAN.md
last_updated: "2026-04-06T21:52:27.756Z" last_updated: "2026-04-06T21:55:43.942Z"
last_activity: 2026-04-06 last_activity: 2026-04-06
progress: progress:
total_phases: 7 total_phases: 7
@@ -25,8 +25,8 @@ See: .planning/PROJECT.md (updated 2026-04-05)
## Current Position ## Current Position
Phase: 03 (communication-protocol) — EXECUTING Phase: 4
Plan: 3 of 3 Plan: Not started
Status: Phase complete — ready for verification Status: Phase complete — ready for verification
Last activity: 2026-04-06 Last activity: 2026-04-06

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.planning/phases/03-communication-protocol/03-VERIFICATION.md Normal file
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---
phase: 03-communication-protocol
verified: 2026-04-06T22:10:00Z
status: passed
score: 13/13 must-haves verified
re_verification: false
---
# Phase 03: Communication Protocol Verification Report
**Phase Goal:** Build the communication protocol layer — UDP packet encoders, animation library, and end-to-end validation that frames travel from animation render to UDP wire.
**Verified:** 2026-04-06T22:10:00Z
**Status:** passed
**Re-verification:** No — initial verification
---
## Goal Achievement
### Observable Truths
All truths drawn from the three plan `must_haves` blocks (plans 01, 02, 03).
| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | DRGB encoder produces correct 2-byte header + 3-byte-per-pixel body | VERIFIED | `test_encode_drgb_basic` passes: `bytes([0x02,2,255,0,0,0,255,0])` exact match |
| 2 | DRGBW encoder produces correct 2-byte header + 4-byte-per-pixel body | VERIFIED | `test_encode_drgbw_basic` passes: `bytes([0x03,2,255,0,0,128])` exact match |
| 3 | DNRGB encoder splits 300+ LED frames into multiple packets under 1472 bytes each | VERIFIED | `test_dnrgb_split_600_pixels`, `test_dnrgb_packets_under_mtu` pass; big-endian start index verified |
| 4 | Animation command packet uses 0xAC marker and encodes all 7 animation type IDs | VERIFIED | `test_animation_cmd_all_type_ids`, `test_animation_cmd_marker_byte` pass for all 7 types |
| 5 | SK6812 encode_animation_cmd returns real bytes, not empty stub | VERIFIED | `sk6812.py` imports `_encode_cmd`, no `return b""` present; returns 16-byte 0xAC packet |
| 6 | WS2801 encode_animation_cmd returns real bytes, not empty stub | VERIFIED | `ws2801.py` imports `_encode_cmd`, no `return b""` present; returns 16-byte 0xAC packet |
| 7 | UDPSender can send to arbitrary IP:port via asyncio DatagramTransport | VERIFIED | `UDPSender` class uses `loop.create_datagram_endpoint` with `local_addr=("0.0.0.0", 0)` |
| 8 | All 7 animation types render frames as list of RGB tuples with length == led_count | VERIFIED | `test_all_render_length` passes across all 7 types; output length always equals led_count |
| 9 | Each animation accepts speed, color, and type-specific params from a dict | VERIFIED | `test_from_params_all_types` passes; all classes have `from_params(params)` classmethod |
| 10 | Fire animation uses Fire2012 algorithm with cooling/sparking params | VERIFIED | `fire.py` implements `_fire_step` with cool/drift/spark; `test_fire_produces_some_color` passes |
| 11 | Simulator receives and logs all 4 packet types (DRGB/DRGBW/DNRGB/ANIM_CMD) with correct parsing | VERIFIED | `test_e2e_drgb_10_pixels`, `test_e2e_drgbw_10_pixels`, `test_e2e_dnrgb_600_pixels`, `test_e2e_animation_cmd_chase` all pass |
| 12 | UDPSender is started in FastAPI lifespan and available as app.state.udp_sender | VERIFIED | `main.py` contains `await udp_sender.start()` and `app.state.udp_sender = udp_sender` and `await app.state.udp_sender.stop()` |
| 13 | End-to-end test sends packets via UDPSender and simulator receives them correctly | VERIFIED | `test_e2e_full_pipeline` and `test_e2e_sk6812_rgbw_pipeline` trace full stack: render -> encode -> send -> receive |
**Score:** 13/13 truths verified
---
### Required Artifacts
| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `lightsync/protocol/drgb.py` | DRGB/DRGBW/DNRGB encoders | VERIFIED | 72 lines; `encode_drgb`, `encode_drgbw`, `encode_dnrgb_packets` + all constants |
| `lightsync/protocol/animation_cmd.py` | Animation command encoder/decoder | VERIFIED | 147 lines; `encode_animation_cmd`, `decode_animation_cmd`, `ANIMATION_IDS` (7 entries) |
| `lightsync/protocol/udp_sender.py` | Async UDP transport wrapper | VERIFIED | 64 lines; `UDPSender` + `_NullProtocol` + `start`/`stop`/`send`/`is_running` |
| `lightsync/protocol/simulator.py` | UDP simulator with packet logging | VERIFIED | 144 lines; `SimulatorProtocol`, `PacketLog`, `run_simulator`, `__main__` block |
| `lightsync/protocol/__init__.py` | Package init | VERIFIED | exists (empty) |
| `lightsync/animations/base.py` | AnimationBase ABC | VERIFIED | `class AnimationBase(ABC)` with `render` and `from_params` abstract methods |
| `lightsync/animations/__init__.py` | Animation registry and factory | VERIFIED | `ANIMATION_REGISTRY` with all 7 types; `create_animation()` factory |
| `lightsync/animations/fire.py` | Fire2012 animation | VERIFIED | `class FireAnimation(AnimationBase)` with `_fire_step` and `_heat_to_rgb` |
| `lightsync/animations/solid_color.py` | SolidColor animation | VERIFIED | `class SolidColorAnimation(AnimationBase)` |
| `lightsync/animations/chase.py` | Chase animation | VERIFIED | `class ChaseAnimation(AnimationBase)` |
| `lightsync/animations/pulse.py` | Pulse animation | VERIFIED | `class PulseAnimation(AnimationBase)` with `math.sin` |
| `lightsync/animations/rainbow.py` | Rainbow animation | VERIFIED | `class RainbowAnimation(AnimationBase)` with `colorsys.hsv_to_rgb` |
| `lightsync/animations/strobe.py` | Strobe animation | VERIFIED | `class StrobeAnimation(AnimationBase)` |
| `lightsync/animations/color_wipe.py` | ColorWipe animation | VERIFIED | `class ColorWipeAnimation(AnimationBase)` |
| `tests/test_protocol.py` | Protocol encoding tests | VERIFIED | 258 lines; 27 tests, all passing |
| `tests/test_animations.py` | Animation render tests | VERIFIED | 24 tests, all passing |
| `tests/test_e2e_protocol.py` | End-to-end protocol tests | VERIFIED | 198 lines; 7 tests, all passing |
| `lightsync/devices/sk6812.py` | SK6812 with real encoding | VERIFIED | imports `_encode_cmd`, no stub `return b""` |
| `lightsync/devices/ws2801.py` | WS2801 with real encoding | VERIFIED | imports `_encode_cmd`, no stub `return b""` |
---
### Key Link Verification
| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `lightsync/devices/sk6812.py` | `lightsync/protocol/animation_cmd.py` | `from lightsync.protocol.animation_cmd import encode_animation_cmd as _encode_cmd` | WIRED | Import present at line 3; `encode_animation_cmd` called in method body |
| `lightsync/devices/ws2801.py` | `lightsync/protocol/animation_cmd.py` | `from lightsync.protocol.animation_cmd import encode_animation_cmd as _encode_cmd` | WIRED | Import present at line 3; `encode_animation_cmd` called in method body |
| `lightsync/protocol/drgb.py` | WLED spec | byte layout constants `PROTOCOL_DRGB = 2` | WIRED | `PROTOCOL_DRGB = 2`, `PROTOCOL_DRGBW = 3`, `PROTOCOL_DNRGB = 4` at lines 8-10 |
| `lightsync/animations/__init__.py` | all animation subclasses | `ANIMATION_REGISTRY` dict | WIRED | Dict maps all 7 names; each entry imports real class; `create_animation` uses it |
| `lightsync/protocol/simulator.py` | `lightsync/protocol/drgb.py` | protocol type byte constants | WIRED | Imports `PROTOCOL_DRGB`, `PROTOCOL_DRGBW`, `PROTOCOL_DNRGB`, `WLED_PORT`; uses in `datagram_received` |
| `lightsync/main.py` | `lightsync/protocol/udp_sender.py` | `app.state.udp_sender` | WIRED | Import at line 10; `app.state.udp_sender = udp_sender` at line 32; `stop()` at line 37 |
| `tests/test_e2e_protocol.py` | `lightsync/protocol/udp_sender.py` | `UDPSender` send() | WIRED | `UDPSender` imported and used in all 6 async test helpers |
---
### Data-Flow Trace (Level 4)
Animations are pure computation (no I/O), and the protocol layer is an encoder (no state). Data-flow trace applies to the end-to-end path: animation render output flows into encoder, encoder output flows to UDPSender, UDPSender transmits to simulator.
| Component | Data Variable | Source | Produces Real Data | Status |
|-----------|---------------|--------|--------------------|--------|
| `SolidColorAnimation.render()` | pixel list | `self.color * led_count` | Yes — real tuple list | FLOWING |
| `encode_drgb(pixels)` | bytes output | input pixel list + header constants | Yes — deterministic encoding | FLOWING |
| `UDPSender.send()` | payload bytes | caller-provided bytes | Yes — passes through to `_transport.sendto()` | FLOWING |
| `SimulatorProtocol.datagram_received()` | `PacketLog` | UDP datagram | Yes — `protocol.packets` accumulates real packets in e2e tests | FLOWING |
| `ANIMATION_REGISTRY` | class references | module-level imports | Yes — all 7 classes imported from real modules | FLOWING |
---
### Behavioral Spot-Checks
| Behavior | Command | Result | Status |
|----------|---------|--------|--------|
| Protocol tests pass | `uv run python -m pytest tests/test_protocol.py -v` | 27 passed in 0.04s | PASS |
| Animation tests pass | `uv run python -m pytest tests/test_animations.py -v` | 24 passed | PASS |
| E2E tests pass | `uv run python -m pytest tests/test_e2e_protocol.py -v` | 7 passed | PASS |
| All 58 tests pass together | full pytest run | 58 passed in 0.49s | PASS |
| Animation registry has 7 entries | `len(ANIMATION_REGISTRY) == 7` | 7 | PASS |
| Fire animation renders 30-LED frame | `a.render(1.0, 30)` len check | 30 tuples | PASS |
| run_simulator importable | `callable(run_simulator)` | True | PASS |
| UDPSender default state | `not s.is_running` before start | True | PASS |
---
### Requirements Coverage
| Requirement | Source Plan | Description | Status | Evidence |
|-------------|-------------|-------------|--------|----------|
| ANI-01 | 03-02 | Built-in animation types: chase, pulse, rainbow, strobe, color wipe, fire, solid color | SATISFIED | All 7 types in `ANIMATION_REGISTRY`; 24 animation tests pass |
| ANI-02 | 03-02 | Per-animation parameters: speed, primary color(s), secondary color(s), direction, length/density | SATISFIED | All animation classes accept these params via `from_params()`; `test_from_params_all_types` passes |
| ANI-03 | 03-01 | RGBW-aware color handling for SK6812 (separate W channel) | SATISFIED | `SK6812Device` encodes RGBW frames; `encode_drgbw` handles 4-channel pixels; e2e RGBW pipeline test passes |
| ANI-04 | 03-01 | RGB color handling for WS2801 | SATISFIED | `WS2801Device` encodes RGB frames; `encode_drgb` handles 3-channel pixels |
| UDP-01 | 03-01 | Animation command packet: device ID, animation type, params | SATISFIED | `encode_animation_cmd` produces 16-byte 0xAC packets with type + params; roundtrip verified |
| UDP-02 | 03-01 | Raw pixel frame packet: WLED DRGB/DNRGB/DRGBW protocol | SATISFIED | All three WLED encoders implemented with correct byte layout per spec |
| UDP-03 | 03-01 | Multi-packet framing for frames >MTU | SATISFIED | `encode_dnrgb_packets` splits at 489 px/packet; 600-LED frame -> 2 packets with correct start indices; all packets <= 1472 bytes |
| UDP-04 | 03-03 | Software UDP receiver/simulator for testing without physical hardware | SATISFIED | `SimulatorProtocol` parses all 4 packet types; 7 e2e tests prove full pipeline without hardware |
All 8 requirements (ANI-01 through ANI-04, UDP-01 through UDP-04) fully satisfied.
---
### Anti-Patterns Found
No anti-patterns detected across any phase artifacts:
- No `TODO`/`FIXME`/`PLACEHOLDER` comments in protocol or animation code
- No `return b""` stubs remaining in device files
- No `return []` or `return {}` in animation render methods
- No hardcoded empty state passed to rendering
- Fire animation lazy-initializes heat array per `led_count` — not a stub, correct design pattern
---
### Human Verification Required
None. All phase behaviors are fully testable programmatically:
- Protocol encoding correctness is byte-level deterministic
- Animation rendering is pure computation with known outputs
- End-to-end pipeline uses real UDP loopback sockets in tests
- FastAPI lifespan integration verified via static analysis of `main.py`
---
## Summary
Phase 03 goal fully achieved. The communication protocol layer is complete:
**Plan 01 (Protocol Encoders):** WLED-compatible DRGB, DRGBW, and DNRGB encoders implemented with correct byte layout, MTU constraints, and big-endian start indices. Custom 0xAC animation command format encodes and decodes all 7 animation types. UDPSender provides async start/stop lifecycle with synchronous fire-and-forget send. SK6812 and WS2801 device stubs replaced with real 16-byte packet encoding. 27 protocol tests pass.
**Plan 02 (Animation Library):** All 7 animation types (solid_color, chase, pulse, rainbow, strobe, color_wipe, fire) implemented as pure renderers. AnimationBase ABC enforces the `render(t, led_count)` and `from_params(params)` contract. ANIMATION_REGISTRY maps all 7 names. `create_animation()` factory raises ValueError for unknown types. Fire2012 algorithm correct. 24 animation tests pass.
**Plan 03 (Simulator + E2E):** SimulatorProtocol parses all 4 packet types and logs structured PacketLog entries. UDPSender integrated into FastAPI lifespan (`app.state.udp_sender`). 7 end-to-end tests prove the complete frame-to-wire pipeline using real loopback UDP sockets, no mocking. Simulator runnable standalone via `python -m lightsync.protocol.simulator`. 7 e2e tests pass.
**Total:** 58/58 tests pass. 8/8 requirements satisfied. 0 stubs remaining.
---
_Verified: 2026-04-06T22:10:00Z_
_Verifier: Claude (gsd-verifier)_