docs(05-02): complete Async Thunks & Component Core plan
Phase 5 Plan 2 complete in 25 minutes. 6 async thunks, 3 WebSocket handlers, component skeleton. All tasks committed atomically.
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@ -74,7 +74,7 @@ Plans:
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Plans:
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- [x] 05-01: Redux infrastructure & bug fixes
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- [ ] 05-02: Async thunks & component core
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- [x] 05-02: Async thunks & component core
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- [ ] 05-03: Playback controls & polling
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- [ ] 05-04: Mixdown selection & download UI
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- [ ] 05-05: Error handling & final UAT
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@ -109,6 +109,6 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6 → 7
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| 2. Backing Track Seek Controls | 1/1 | Complete | 2026-01-14 |
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| 3. Backing Track Finalization | 3/3 | Complete | 2026-01-14 |
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| 4. JamTrack Research & Design | 2/2 | Complete | 2026-01-14 |
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| 5. JamTrack Implementation | 1/5 | In progress | - |
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| 5. JamTrack Implementation | 2/5 | In progress | - |
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| 6. Metronome Research & Design | 0/TBD | Not started | - |
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| 7. Metronome Implementation | 0/TBD | Not started | - |
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@ -10,16 +10,16 @@ See: .planning/PROJECT.md (updated 2026-01-13)
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## Current Position
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Phase: 5 of 7 (JamTrack Implementation) - IN PROGRESS
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Plan: 1 of 5 in current phase
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Status: Complete (Plan 1)
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Last activity: 2026-01-14 — Completed Phase 5 Plan 1 (Redux Infrastructure & Bug Fixes)
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Plan: 2 of 5 in current phase
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Status: Complete (Plan 2)
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Last activity: 2026-01-14 — Completed Phase 5 Plan 2 (Async Thunks & Component Core)
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Progress: ████████░░ 20%
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Progress: ████████░░ 40%
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 9
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- Total plans completed: 10
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- Average duration: TBD
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- Total execution time: TBD
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@ -31,11 +31,11 @@ Progress: ████████░░ 20%
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| 2 | 1 | 120 min | 120 min |
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| 3 | 3 | TBD | TBD |
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| 4 | 2 | 41 min | 20.5 min |
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| 5 | 1/5 | TBD | TBD |
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| 5 | 2/5 | 25 min | 12.5 min |
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**Recent Trend:**
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- Last 5 plans: TBD, 21 min, 20 min, Plan 05-01 (Redux infrastructure)
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- Trend: Phase 5 started (implementation), Plan 1 complete
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- Last 5 plans: TBD, 21 min, 20 min, Plan 05-01 (Redux infrastructure), 25 min (Plan 05-02)
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- Trend: Phase 5 progressing well (async infrastructure complete)
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## Accumulated Context
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@ -99,6 +99,18 @@ Recent decisions affecting current work:
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- UI preferences: openJamTrack tracks currently open player, jamTrackUI stores user preferences (lastUsedMixdownId, volume)
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- Redux foundation complete: 10 new reducers and 8 new selectors across 3 slices ready for Phase 5 Plans 2-5
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**From Phase 5 Plan 2 (05-jamtrack-implementation):**
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- Enhanced loadJamTrack checks sync state and triggers download if needed before playback
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- downloadJamTrack uses global window callbacks for native client integration (callbacks passed as string names)
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- seekJamTrack applies UAT-003 fix pattern (pending seek while paused, applied on resume)
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- WebSocket handlers parse messages correctly with parseInt for numbers
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- Thunks can dispatch other thunks using dispatch().unwrap() pattern
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- Global callbacks named as strings for native client callback pattern (window.jamTrackDownloadProgress, etc.)
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- Component cleanup on unmount with closeJamTrack thunk prevents memory leaks
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- Component initialization pattern: buildFqId → check sync → autoPlay
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- 6 async thunks complete: loadJamTrack (enhanced), downloadJamTrack, checkJamTrackSync, loadJMEP, seekJamTrack, closeJamTrack
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- 3 WebSocket handlers active: MIXER_CHANGES (extended for mixdowns), JAM_TRACK_CHANGES (enhanced), MIXDOWN_CHANGES (new)
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### Deferred Issues
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**From Phase 3 Plan 3 UAT:**
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@ -125,7 +137,7 @@ None yet.
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## Session Continuity
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Last session: 2026-01-14
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Stopped at: Completed Phase 5 Plan 1 (Redux Infrastructure & Bug Fixes)
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Stopped at: Completed Phase 5 Plan 2 (Async Thunks & Component Core)
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Resume file: None
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**Next:** Phase 5 Plan 2 (Async Thunks & Component Core) - Execute with `/gsd:execute-plan .planning/phases/05-jamtrack-implementation/05-02-PLAN.md`
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**Next:** Phase 5 Plan 3 (Playback Controls & Polling) - Execute with `/gsd:execute-plan .planning/phases/05-jamtrack-implementation/05-03-PLAN.md`
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@ -0,0 +1,127 @@
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---
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phase: 05-jamtrack-implementation
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plan: 02
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subsystem: media
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tags: [redux, thunks, websocket, react, jamclient]
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# Dependency graph
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requires:
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- phase: 05-01
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provides: Redux state structures (jamTrackState, downloadState, mixdown state)
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provides:
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- 6 async thunks for JamTrack operations
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- 3 WebSocket handlers for real-time updates
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- JKSessionJamTrackPlayer component skeleton
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affects: [05-03, 05-04, 05-05]
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# Tech tracking
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tech-stack:
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added: []
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patterns:
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- "Async thunks with dispatch for nested operations"
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- "Global callbacks for native client download progress"
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- "Component initialization: buildFqId → check sync → autoPlay"
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key-files:
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created:
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- jam-ui/src/components/client/JKSessionJamTrackPlayer.js
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modified:
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- jam-ui/src/store/features/mediaSlice.js
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- jam-ui/src/hooks/useSessionWebSocket.js
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key-decisions:
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- "Enhanced loadJamTrack checks sync state and triggers download if needed"
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- "downloadJamTrack uses global window callbacks for native client integration"
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- "seekJamTrack applies UAT-003 fix pattern (pending seek while paused)"
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- "WebSocket handlers parse messages correctly with parseInt for numbers"
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patterns-established:
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- "Thunks can dispatch other thunks using dispatch().unwrap()"
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- "Global callbacks named as strings for native client callback pattern"
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- "Component cleanup on unmount with closeJamTrack thunk"
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issues-created: []
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# Metrics
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duration: 25min
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completed: 2026-01-14
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---
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# Phase 5 Plan 2: Async Thunks & Component Core Summary
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**Complete async infrastructure with 6 thunks, 3 WebSocket handlers, and skeleton component for JamTrack player**
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## Performance
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- **Duration:** 25 min
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- **Started:** 2026-01-14T15:58:38Z
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- **Completed:** 2026-01-14T16:23:47Z
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- **Tasks:** 3
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- **Files modified:** 3
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## Accomplishments
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- **6 async thunks implemented:** Enhanced loadJamTrack with sync checking, downloadJamTrack with progress callbacks, checkJamTrackSync, loadJMEP, seekJamTrack with UAT-003 fix, closeJamTrack with cleanup
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- **3 WebSocket handlers:** Extended MIXER_CHANGES for mixdowns, enhanced JAM_TRACK_CHANGES with correct parsing, added MIXDOWN_CHANGES for download progress
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- **Component skeleton created:** JKSessionJamTrackPlayer with initialization pattern, cleanup on unmount, Redux connections, and placeholder render
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- **All thunks use fqId format** correctly for jamClient calls
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- **Global callback pattern** implemented for native client download integration
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: Implement 6 async thunks in mediaSlice** - `8a536ac62` (feat)
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2. **Task 2: Add 3 WebSocket handlers** - `db06357d3` (feat)
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3. **Task 3: Create JKSessionJamTrackPlayer component skeleton** - `2cf7205ff` (feat)
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**Plan metadata:** (pending)
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## Files Created/Modified
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- `jam-ui/src/store/features/mediaSlice.js` - Added 6 async thunks (loadJamTrack enhanced, downloadJamTrack, checkJamTrackSync, loadJMEP, seekJamTrack, closeJamTrack) with extraReducers
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- `jam-ui/src/hooks/useSessionWebSocket.js` - Extended MIXER_CHANGES, enhanced JAM_TRACK_CHANGES, added MIXDOWN_CHANGES handlers
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- `jam-ui/src/components/client/JKSessionJamTrackPlayer.js` - Created component skeleton with initialization, cleanup, and Redux connections
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## Decisions Made
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**Enhanced loadJamTrack architecture:**
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- Checks sync state via JamTrackGetTrackDetail before playing
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- Automatically triggers downloadJamTrack if not synchronized
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- Loads JMEP if available before playback
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- Returns fqId for component use
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**Global callback pattern for downloads:**
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- Native client requires callback functions as string names (not function references)
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- Set up window.jamTrackDownloadProgress, window.jamTrackDownloadSuccess, window.jamTrackDownloadFail
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- Callbacks dispatch Redux actions to update downloadState
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- Pattern matches legacy MediaContext implementation
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**Component initialization flow:**
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- Build fqId → check sync → set open in Redux → autoPlay if requested
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- Uses mountedRef to prevent state updates after unmount
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- Cleanup on unmount calls closeJamTrack thunk to stop playback and clear state
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**WebSocket parsing:**
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- parseInt applied to position values from WebSocket messages
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- Null/undefined checks with fallback defaults
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- Handlers dispatch to multiple Redux slices (mediaSlice, activeSessionSlice)
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## Deviations from Plan
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None - plan executed exactly as written.
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## Issues Encountered
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None
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## Next Phase Readiness
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- Async infrastructure complete and ready for playback controls
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- Component skeleton ready for UI implementation in Plan 3
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- WebSocket handlers active for real-time state updates
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- All patterns follow Backing Track player conventions from Phase 3
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---
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*Phase: 05-jamtrack-implementation*
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*Completed: 2026-01-14*
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