12 KiB
phase, verified, status, score, re_verification, human_verification
| phase | verified | status | score | re_verification | human_verification | ||||||||||||||||||||||||||||||||||||||||
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| 05-live-show-execution | 2026-04-07T10:45:00Z | passed | 11/11 must-haves verified |
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Phase 5: Live Show Execution — Verification Report
Phase Goal: Live show execution — transport controls (play/pause/seek), keyboard shortcuts, and live preview panel with WebSocket-driven cue scheduler firing UDP commands during playback.
Verified: 2026-04-07T10:45:00Z
Status: passed
Re-verification: Yes — after gap closure (plan 05-04, commit ac0f3d5)
Re-Verification Summary
Previous score was 9/11 (2 partial truths, both from the same root cause: the transport bar play/pause button did not send WebSocket messages to the server, leaving is_playing=False for mouse-driven playback).
Gap plan 05-04 added client.send({ type: 'play', position: audio.currentTime }) and client.send({ type: 'pause', position: audio.currentTime }) to the audio element event listeners in wireAudio(). These listeners fire for ALL triggers (mouse click, keyboard, programmatic), so the fix covers both input paths without duplication risk.
Commit ac0f3d5 (2026-04-07): 2 lines changed in lightsync/frontend/app.js. Confirmed present in the actual file at lines 135-136.
Goal Achievement
Observable Truths
| # | Truth | Status | Evidence |
|---|---|---|---|
| 1 | Server fires UDP animation commands when audio position reaches a cue timestamp | VERIFIED | ws.py:133-168: cue scheduler gated on is_playing; app.js:135 now sends {type:'play'} on audio 'play' event — both mouse and keyboard set is_playing=True |
| 2 | Seeking resets the cue pointer so past cues are marked fired and future cues re-arm | VERIFIED | ws.py:207-214: fired_ids rebuilt as set comprehension on seek (unchanged from initial verification) |
| 3 | Loading a show via WebSocket populates per-connection cue list from show_store | VERIFIED | ws.py:232-242: load handler calls _main.show_store.load(show_id) and assigns to per-connection show variable |
| 4 | Cues within 60ms ahead of tick position fire immediately (never late) | VERIFIED | ws.py:134: LOOKAHEAD = 0.060; ws.py:155: fires cues where timestamp <= position + LOOKAHEAD |
| 5 | Pausing does not add cues to fired_ids; cues only fire during active playback | VERIFIED | Server pause handler sets is_playing=False without touching fired_ids; app.js:136 now sends {type:'pause'} from audio 'pause' listener — both mouse and keyboard trigger server pause |
| 6 | Live preview panel shows active animation color and type per device, updated in sync with playback | VERIFIED | app.js:77-92: updatePreviewStrip updates strip DOM on preview_update WS messages; ws.py broadcasts on every tick |
| 7 | Devices with no active cue show a dim inactive indicator | VERIFIED | ws.py:183-188: sends preview_update with animation:null, color:null for inactive tracks; app.js:87-91 removes active class, resets to em dash |
| 8 | A show can be selected from a dropdown and loaded into the timeline + server | VERIFIED | app.js:496-567: refreshShows() populates #show-select; btn-load-show handler fetches full show and sends {type:'load', show_id} |
| 9 | Space bar toggles play/pause without triggering button clicks or scrolling | VERIFIED | app.js:188-197: Space handler checks tag !== 'button', calls e.preventDefault(), toggles audio, sends WS message |
| 10 | Arrow keys seek audio forward/backward by 5 seconds and send seek message to server | VERIFIED | app.js:198-223: ArrowLeft/Right set audio.currentTime ±5, send {type:'seek'}, clear preview strips |
| 11 | Ctrl+Z undoes, Ctrl+Shift+Z/Ctrl+Y redoes, Ctrl+S saves without browser dialog | VERIFIED | app.js:224-244: all three bindings with e.preventDefault(), timeline?.history.undo()/redo(), Ctrl+S does GET+POST round-trip |
Score: 11/11 truths verified
Required Artifacts
| Artifact | Expected | Status | Details |
|---|---|---|---|
lightsync/api/ws.py |
Server-side cue scheduler | VERIFIED | LOOKAHEAD, fired_ids, is_playing, encode_animation_cmd, udp.send, preview_update broadcast, seek rebuild, show loading — all present |
lightsync/frontend/index.html |
Live-preview div, show selector UI | VERIFIED | #live-preview, #show-select, #btn-load-show, .keyboard-hint all present |
lightsync/frontend/style.css |
Terminal-aesthetic preview panel styles | VERIFIED | .live-preview, .device-strip, .strip-label, .strip-color, .strip-anim, .keyboard-hint all present |
lightsync/frontend/app.js |
preview_update handler, show selector, wireKeyboard, wireAudio with WS messages | VERIFIED | All functions present; audio event listeners at lines 135-136 include client.send() calls |
Key Link Verification
| From | To | Via | Status | Details |
|---|---|---|---|---|
| app.js wireAudio() audio 'play' listener | ws.py is_playing | client.send({ type: 'play' }) | WIRED | Line 135: fires for mouse click, keyboard, and programmatic play |
| app.js wireAudio() audio 'pause' listener | ws.py is_playing | client.send({ type: 'pause' }) | WIRED | Line 136: fires for mouse click, keyboard, and programmatic pause |
| wireKeyboard() Space handler | ws.py is_playing | client.send({ type: 'play'/'pause' }) | WIRED | Lines 193, 196: keyboard shortcut also sends — server handlers idempotent |
| ws.py cue scheduler | encode_animation_cmd | import + call in tick branch | WIRED | Line 25 import; line 167 call |
| ws.py cue scheduler | udp_sender.send | websocket.app.state.udp_sender.send() | WIRED | Line 135: udp ref; line 168: udp.send(payload, device.ip, device.port) |
| ws.py load handler | show_store | import lightsync.main, show_store.load() | WIRED | Lines 234-235: import + async load |
| app.js | ws.py preview_update | WebSocket onmessage handler | WIRED | Line 53: else if (msg.type === 'preview_update') updatePreviewStrip(...) |
| app.js | /api/shows | fetch to list and load shows | WIRED | Lines 500, 524: two fetch calls |
| app.js | commands.js setCurrentShowId | import + call on show load | WIRED | Line 6 import; line 542 call |
Data-Flow Trace (Level 4)
| Artifact | Data Variable | Source | Produces Real Data | Status |
|---|---|---|---|---|
| app.js updatePreviewStrip | animation, color | preview_update WS from ws.py tick | Yes — driven by actual cue data from show_store | FLOWING |
| app.js refreshShows | shows array | GET /api/shows | Real show data from show_store JSON files | FLOWING |
| ws.py cue scheduler | show.tracks, cue.timestamp | show_store.load(show_id) from JSON persistence | Real data from saved show files | FLOWING |
| app.js buildPreviewStrips | devices | GET /api/devices | Real device registry | FLOWING |
Behavioral Spot-Checks
| Behavior | Command | Result | Status |
|---|---|---|---|
| audio 'play' listener sends WS message | grep line 135 app.js | client.send({ type: 'play', position: audio.currentTime }) present |
PASS |
| audio 'pause' listener sends WS message | grep line 136 app.js | client.send({ type: 'pause', position: audio.currentTime }) present |
PASS |
| 2 play sends total (wireAudio + wireKeyboard) | grep -c client.send.*'play' app.js | 2 | PASS |
| 2 pause sends total (wireAudio + wireKeyboard) | grep -c client.send.*'pause' app.js | 2 | PASS |
| wireKeyboard shortcuts intact | grep ArrowLeft/ArrowRight/KeyZ/KeyS | All present at expected lines | PASS |
| wireKeyboard() called at module level | grep wireKeyboard() | Called at line 351 | PASS |
Commit ac0f3d5 in git history |
git show ac0f3d5 --stat |
1 file changed, 2 insertions, 2 deletions in app.js | PASS |
| LOOKAHEAD constant in ws.py | grep LOOKAHEAD ws.py | LOOKAHEAD = 0.060 at line 134 | PASS |
| is_playing set True on play, False on pause | grep is_playing ws.py | Lines 197, 201, 239 confirmed | PASS |
Requirements Coverage
| Requirement | Source Plan | Description | Status | Evidence |
|---|---|---|---|---|
| SHW-03 | 05-01, 05-02, 05-04 | Live show execution — follow playback position, dispatch animation commands to devices via UDP at correct timestamps | VERIFIED | Cue scheduler armed for both mouse (wireAudio listeners) and keyboard (wireKeyboard); LOOKAHEAD=60ms; fired_ids prevent double-fire; seek rebuilds state |
| UI-03 | 05-03 | All primary operations accessible without mouse (keyboard shortcuts for play/pause/seek/undo) | VERIFIED | wireKeyboard() wires all 7 shortcuts with correct guards and preventDefault |
| UI-04 | 05-02 | Live preview panel — LED strip visualization in browser, synced to playback | VERIFIED | DOM strips, CSS styles, preview_update handler, and preview broadcast all wired |
No orphaned requirements. All three IDs (SHW-03, UI-03, UI-04) appear across plans 05-01 through 05-04 and are fully satisfied.
Anti-Patterns Found
None. The previous blocker (mouse play/pause not sending WS messages) is resolved. No new anti-patterns introduced by the gap fix — the 2-line change follows the same pattern already established by wireKeyboard() sends.
Human Verification Required
1. Mouse-Based Playback
Test: Load a show using the show selector, click the transport bar play button (not Space) Expected: Animation blocks trigger UDP commands; LED simulator/devices respond at correct timestamps Why human: Requires running server + loaded show + UDP traffic observation
2. Live Preview Strip Updates
Test: Load a show with at least one device and animation block, press Space to play Expected: Device strips light up with animation name and color; strips dim between blocks Why human: Visual DOM state requires live WebSocket + audio playback
3. Seek + Reschedule
Test: Play a show to the middle, drag seek bar to earlier position, continue playing Expected: Past cues not re-fired; cues after seek position fire correctly Why human: Real-time timing behavior requires live playback
4. Ctrl+S Save Round-Trip
Test: Load a show, drag a block, press Ctrl+S Expected: No browser save dialog; change persists on show reload Why human: Persistence verification requires live app + file system check
Gaps Summary
No gaps remain. The single root cause identified in the initial verification (mouse play/pause button not sending WebSocket messages to the server) was fixed in plan 05-04 by adding client.send() calls to the audio element's 'play' and 'pause' event listeners in wireAudio(). These listeners fire for all triggers — button click, keyboard, and programmatic — making the fix source-agnostic. Both wireAudio() and wireKeyboard() now send the same WS messages; the server handlers are idempotent (setting a boolean flag), so dual sends are harmless.
All 11 observable truths are verified. Phase 05 goal is achieved.
Verified: 2026-04-07T10:45:00Z
Verifier: Claude (gsd-verifier)
Re-verification: Yes (gaps closed by plan 05-04, commit ac0f3d5)