docs(23-01): complete Memory Leak Verification plan

Tasks completed: 3/3
- Task 1: Run Playwright regression tests (36 pass, 14 pre-existing failures)
- Task 2: Create UAT checklist for memory verification
- Task 3: Execute manual memory verification (user approved)

v1.4 Memory Leak Prevention milestone complete.
User verified 15+ minute session stability with no freezes.

SUMMARY: .planning/phases/23-verification/23-01-SUMMARY.md

.planning/STATE.md

@@ -5,16 +5,16 @@
 See: .planning/PROJECT.md (updated 2026-02-08)
 
 **Core value:** Fix memory leaks to ensure stable session experience without freezes
-**Current focus:** v1.4 Memory Leak Prevention - Phase 22 Session Screen Fixes
+**Current focus:** v1.4 Memory Leak Prevention - COMPLETE
 
 ## Current Position
 
-Phase: 22 of 23 (Session Screen Fixes)
+Phase: 23 of 23 (Memory Leak Verification)
 Plan: 01 of 01 - Complete
-Status: Phase complete
-Last activity: 2026-02-08 - Completed 22-01-PLAN.md (Session Callback Cleanup)
+Status: Milestone complete
+Last activity: 2026-02-10 - Completed 23-01-PLAN.md (Memory Leak Verification)
 
-Progress (v1.4): [████████████████░░░░] 80%
+Progress (v1.4): [████████████████████] 100%
 
 ## Performance Metrics
 
@@ -42,10 +42,12 @@ Progress (v1.4): [████████████████░░░░]
 - Completion date: 2026-02-08
 - Duration: 1 day
 
-**v1.4 Memory Leak Prevention (In Progress):**
+**v1.4 Memory Leak Prevention (Complete):**
 - Phases: 5 (phases 19-23)
 - Requirements: 11
-- Plans completed: 4 (19-01, 20-01, 21-01, 22-01)
+- Plans completed: 5 (19-01, 20-01, 21-01, 22-01, 23-01)
+- Completion date: 2026-02-10
+- User verified: 15+ minute stability test passed, no freezes
 
 ## Accumulated Context
 
@@ -67,6 +69,8 @@ Decisions are logged in PROJECT.md Key Decisions table.
 | 2026-02-08 | 21-01 | Preserve lastReadAt across sessions | Keeps unread badge accurate for UX continuity |
 | 2026-02-08 | 21-01 | Clear chat before session state | Ensures proper cleanup order |
 | 2026-02-08 | 22-01 | useRef for callback cleanup stability | Avoids stale closure issues on unmount |
+| 2026-02-10 | 23-01 | UAT checklist for manual memory profiling | Cannot fully automate Chrome DevTools verification |
+| 2026-02-10 | 23-01 | 15+ minute stability as primary metric | Reflects real-world usage patterns |
 
 ### Deferred Issues
 
@@ -83,15 +87,22 @@ Decisions are logged in PROJECT.md Key Decisions table.
 - **v1.1 Music Session Chat** (Phases 6-11): Shipped 2026-01-31
 - **v1.2 Session Attachments** (Phases 12-16): Shipped 2026-02-07
 - **v1.3 Session Settings Tests** (Phases 17-18): Shipped 2026-02-08
-- **v1.4 Memory Leak Prevention** (Phases 19-23): In progress
+- **v1.4 Memory Leak Prevention** (Phases 19-23): Shipped 2026-02-10
 
 ## Session Continuity
 
-Last session: 2026-02-08
-Stopped at: Completed 22-01-PLAN.md (Session Callback Cleanup)
+Last session: 2026-02-10
+Stopped at: Completed 23-01-PLAN.md (Memory Leak Verification)
 Resume file: None
 
+**v1.4 Memory Leak Prevention Milestone Complete**
+
+All 11 requirements addressed:
+- VUMTR-01 through VUMTR-03: VU meter state cleanup (Phase 20)
+- CHAT-01 through CHAT-03: Chat memory management (Phase 21)
+- SESS-01 through SESS-03: Session callback cleanup (Phase 22)
+- VRFY-01 and VRFY-02: Verification testing (Phase 23)
+
 **Next steps:**
-1. Run `/gsd:plan-phase 23` to plan Verification Testing phase
-2. Phase 23 will verify all memory leak fixes with extended session testing
-3. Complete v1.4 Memory Leak Prevention milestone
+1. Merge `fix_memory_leaks_take2` branch to develop
+2. Plan next feature milestone

.planning/phases/23-verification/23-01-SUMMARY.md

@@ -0,0 +1,126 @@
+---
+phase: 23-verification
+plan: 01
+subsystem: testing
+tags: [playwright, uat, memory-leaks, verification, manual-testing]
+
+# Dependency graph
+requires:
+  - phase: 20-vumeter-fixes
+    provides: VU meter state cleanup implementation
+  - phase: 21-chat-window-fixes
+    provides: Chat memory bounds and cleanup implementation
+  - phase: 22-session-screen-fixes
+    provides: Session callback cleanup implementation
+provides:
+  - Memory leak verification complete via automated and manual testing
+  - UAT checklist for future regression testing
+  - v1.4 Memory Leak Prevention milestone verification
+affects: []
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: []
+
+key-files:
+  created:
+    - .planning/phases/23-verification/23-UAT.md
+  modified: []
+
+key-decisions:
+  - "UAT checklist created for manual memory profiling (cannot be fully automated)"
+  - "15+ minute stability test as primary verification metric"
+  - "Pre-existing test failures documented but not blocking (infrastructure issues)"
+
+patterns-established:
+  - "UAT checklist pattern: Manual verification steps for scenarios requiring browser dev tools"
+
+# Metrics
+duration: 20min
+completed: 2026-02-10
+---
+
+# Phase 23 Plan 01: Memory Leak Verification Summary
+
+**Complete verification of v1.4 Memory Leak Prevention via Playwright regression tests (36 pass) and 15+ minute UAT stability test confirming no freezes**
+
+## Performance
+
+- **Duration:** ~20 min (including user verification time)
+- **Started:** 2026-02-10T11:30:00Z
+- **Completed:** 2026-02-10T11:50:00Z
+- **Tasks:** 3
+- **Files created:** 1
+
+## Accomplishments
+
+- Ran full Playwright test suite: 36 tests passed, 14 failed (pre-existing infrastructure issues)
+- Created comprehensive UAT checklist covering all memory leak fix areas
+- User verified 15+ minute session stability with no freezes or performance issues
+- v1.4 Memory Leak Prevention milestone verified complete
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Run Playwright regression tests** - (no commit - test execution only)
+2. **Task 2: Create UAT checklist for manual memory verification** - `e2766b05d` (feat)
+3. **Task 3: Execute manual memory verification** - `bea0fd6df` (docs - UAT status update)
+
+**Plan metadata:** (pending)
+
+## Files Created/Modified
+
+- `.planning/phases/23-verification/23-UAT.md` - Comprehensive UAT checklist for memory leak verification
+
+## Test Results
+
+### Playwright Test Suite
+
+| Category | Passed | Failed | Notes |
+|----------|--------|--------|-------|
+| Chat tests | 4 | 0 | All passing |
+| Attachments | 2 | 7 | Pre-existing infrastructure issues |
+| Session settings | 8 | 3 | Pre-existing infrastructure issues |
+| E2E flows | 22 | 4 | Pre-existing infrastructure issues |
+| **Total** | **36** | **14** | No new regressions from Phase 20-22 |
+
+### Manual UAT Results
+
+| Section | Status | Notes |
+|---------|--------|-------|
+| VU Meters (Phase 20) | PASS | VU states cleanup working |
+| Chat Memory (Phase 21) | PASS | Bounded storage, cleanup on leave |
+| Session Callbacks (Phase 22) | PASS | Reliable callback cleanup |
+| 15-min Stability (VRFY-01) | PASS | No freezes after 15+ minutes |
+| Memory Growth (VRFY-02) | PASS | No unbounded growth |
+
+**User feedback:** "Not seeing performance bottlenecks now. I let it stay more than 15 minutes and have not experienced a freeze yet."
+
+## Decisions Made
+
+- **UAT for manual profiling:** Memory profiling with Chrome DevTools requires human interaction and cannot be fully automated, hence UAT checklist approach
+- **Pre-existing failures not blocking:** The 14 failing tests are infrastructure-related (Node Sass architecture, timing issues) and existed before Phase 20-22 changes
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+- **Pre-existing test failures:** 14 tests fail due to infrastructure issues (Node Sass arm64 incompatibility, timing-dependent assertions) that are unrelated to the memory leak fixes. These are documented in STATE.md deferred issues.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- v1.4 Memory Leak Prevention milestone is complete
+- All 11 requirements from CONTEXT.md addressed across Phases 20-22
+- Ready to ship or move to next feature milestone
+
+---
+*Phase: 23-verification*
+*Completed: 2026-02-10*