13 KiB
13 KiB
phase, verified, status, score, re_verification
| phase | verified | status | score | re_verification |
|---|---|---|---|---|
| 03-communication-protocol | 2026-04-06T22:10:00Z | passed | 13/13 must-haves verified | 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/PLACEHOLDERcomments in protocol or animation code - No
return b""stubs remaining in device files - No
return []orreturn {}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)