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docs(19): complete Audit and Discovery phase 

Phase 19: Audit and Discovery
- 1 plan executed, 3 tasks completed
- 7 memory leak findings documented
- 3 HIGH severity issues identified
- Implementation recommendations for Phases 20-22
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Nuwan 2026-02-08 14:23:53 +05:30
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.planning/ROADMAP.md
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@ -84,7 +84,7 @@ Decimal phases appear between their surrounding integers in numeric order.
**Milestone Goal:** Fix memory leaks causing session screen freezes after ~10 minutes. Audit and fix cleanup patterns in VU meters, chat window, and session screen components.
- [ ] **Phase 19: Audit and Discovery** - Investigate all three areas, identify actual memory leaks with evidence
- [x] **Phase 19: Audit and Discovery** - Investigate all three areas, identify actual memory leaks with evidence
- [ ] **Phase 20: VU Meter Fixes** - Fix identified VU meter interval/animation cleanup issues
- [ ] **Phase 21: Chat Window Fixes** - Fix identified chat WebSocket listener and state cleanup issues
- [ ] **Phase 22: Session Screen Fixes** - Fix identified session screen useEffect and polling cleanup issues
@ -397,7 +397,7 @@ Plans:
5. Priority ranking of fixes based on severity (which leaks cause the 10-minute freeze)
Plans:
- [ ] 19-01-PLAN.md — Comprehensive memory leak audit (VU meters, chat, session screen)
- [x] 19-01-PLAN.md — Comprehensive memory leak audit (VU meters, chat, session screen) - COMPLETE 2026-02-08
#### Phase 20: VU Meter Fixes
**Goal**: Fix identified VU meter interval/animation cleanup issues
@ -493,7 +493,7 @@ Phases execute in numeric order: 1 → 2 → ... → 18 → 19 → 20 → 21 →
| 16. Attachment Finalization | v1.2 | 2/2 | Complete | 2026-02-07 |
| 17. Unit Tests (Jest) | v1.3 | 1/1 | Complete | 2026-02-08 |
| 18. Integration Tests (Playwright) | v1.3 | 1/1 | Complete | 2026-02-08 |
| 19. Audit and Discovery | v1.4 | 0/1 | Not started | - |
| 19. Audit and Discovery | v1.4 | 1/1 | Complete | 2026-02-08 |
| 20. VU Meter Fixes | v1.4 | 0/TBD | Not started | - |
| 21. Chat Window Fixes | v1.4 | 0/TBD | Not started | - |
| 22. Session Screen Fixes | v1.4 | 0/TBD | Not started | - |

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.planning/phases/19-audit-and-discovery/19-VERIFICATION.md Normal file
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---
phase: 19-audit-and-discovery
verified: 2026-02-08T15:30:00Z
status: passed
score: 5/5 must-haves verified
---
# Phase 19: Audit and Discovery Verification Report
**Phase Goal:** Investigate all three areas (VU meters, chat, session screen) and identify actual memory leaks with evidence
**Verified:** 2026-02-08
**Status:** PASSED
**Re-verification:** No - initial verification
## Goal Achievement
### Observable Truths
| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | VU meter components audited with all timer/animation calls documented | VERIFIED | 19-AUDIT.md lines 23-118 contain ## VU Meter Audit with 6 files audited, line-by-line pattern documentation |
| 2 | Chat components audited with WebSocket and state growth patterns documented | VERIFIED | 19-AUDIT.md lines 120-230 contain ## Chat Window Audit with 4 files audited, messagesByChannel growth analysis |
| 3 | Session screen components audited with all useEffect hooks documented | VERIFIED | 19-AUDIT.md lines 233-353 contain ## Session Screen Audit with 6 files audited, 13 useEffect hooks cataloged |
| 4 | Leak sources identified with severity ratings and evidence | VERIFIED | 19-AUDIT.md contains HIGH/MEDIUM/LOW severity for each finding with file paths and line numbers |
| 5 | Priority ranking exists for Phases 20-22 implementation | VERIFIED | 19-AUDIT.md lines 356-485 contain Priority Summary and Implementation Recommendations sections |
**Score:** 5/5 truths verified
### Required Artifacts
| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `.planning/phases/19-audit-and-discovery/19-AUDIT.md` | Comprehensive memory leak audit report | VERIFIED | 487 lines, contains all required sections |
| Contains "## VU Meter Audit" | VU meter audit section | VERIFIED | Found at line 23, includes SessionTrackVU, useMixerStore, useVuHelpers analysis |
| Contains "## Chat Window Audit" | Chat audit section | VERIFIED | Found at line 120, includes JKSessionChatWindow, sessionChatSlice, useSessionWebSocket analysis |
| Contains "## Session Screen Audit" | Session screen audit section | VERIFIED | Found at line 233, includes JKSessionScreen, useJamServer, useSessionStats analysis |
### Key Link Verification
| From | To | Via | Status | Details |
|------|-----|-----|--------|---------|
| 19-AUDIT.md | Phase 20 (VU Meter Fixes) | VUMTR-* findings | WIRED | VUMTR-01, VUMTR-02, VUMTR-03 documented with specific files/lines and fix recommendations |
| 19-AUDIT.md | Phase 21 (Chat Fixes) | CHAT-* findings | WIRED | CHAT-01, CHAT-02, CHAT-03 documented with specific files/lines and fix recommendations |
| 19-AUDIT.md | Phase 22 (Session Screen Fixes) | SESS-* findings | WIRED | SESS-01, SESS-02, SESS-03 documented with specific files/lines and fix recommendations |
### Findings Verification Against Source Code
Critical findings were cross-referenced against actual source code:
| Finding | Audit Claim | Source Verification | Status |
|---------|-------------|---------------------|--------|
| VUMTR-02 | vuStates grows unbounded (useVuHelpers.js:6, 99-104) | Confirmed: `useState({})` at L6, `setVuStates(prev => ({...prev, [mixerId]: {...}))` at L99-104, no removal function | ACCURATE |
| VUMTR-03 | No per-mixer cleanup | Confirmed: L117-122 cleanup only runs on unmount with `setVuStates({})` | ACCURATE |
| CHAT-01 | Messages accumulate without limit (sessionChatSlice.js:202, 366, 512) | Confirmed: `push(message)` at L202, spread concatenation at L366, no `slice()` or MAX_MESSAGES found | ACCURATE |
| SESS-02/03 | Session screen has proper cleanup | Confirmed: useSessionStats.js L151-153 shows `setInterval` with `return () => clearInterval(interval)` | ACCURATE |
### Requirements Coverage
| Requirement | Status | Notes |
|-------------|--------|-------|
| VUMTR-01, VUMTR-02, VUMTR-03 | DOCUMENTED | Covered in VU Meter Audit section |
| CHAT-01, CHAT-02, CHAT-03 | DOCUMENTED | Covered in Chat Window Audit section |
| SESS-01, SESS-02, SESS-03 | DOCUMENTED | Covered in Session Screen Audit section |
### Anti-Patterns Found
None in the audit document itself. The audit correctly identifies anti-patterns in the source code (unbounded state growth, missing cleanup functions).
### Human Verification Required
None required. This phase is a documentation/discovery phase - all deliverables are verifiable through static analysis.
### Minor Observation
The audit states "14 total hooks" for JKSessionScreen.js but actual count is 13 active useEffect hooks (one at line 714 is commented out). This is a minor documentation discrepancy that does not affect the audit's validity or the goal achievement.
## Conclusion
Phase 19 goal fully achieved. The audit document:
1. **Systematically audited** all three target areas (VU meters, chat, session screen)
2. **Identified specific leak sources** with file paths, line numbers, and severity ratings
3. **Verified findings against source code** - all critical claims are accurate
4. **Created actionable priority ranking** for Phases 20-22 with specific files to modify
**PRIMARY LEAK SOURCES IDENTIFIED:**
- VUMTR-02/03 (HIGH): vuStates object in useVuHelpers.js grows unbounded
- CHAT-01 (HIGH): messagesByChannel in sessionChatSlice.js has no message limit
**CLEARED:** Session screen base components have proper cleanup and are not primary leak sources.
Ready to proceed to Phase 20 (VU Meter Fixes).
---
*Verified: 2026-02-08*
*Verifier: Claude (gsd-verifier)*