docs(30): create phase plan

Phase 30: Component Memoization - 1 plan in 1 wave - Wrap JKSessionAudioInputs with React.memo - Wrap JKSessionRemoteTracks with React.memo - Ready for execution Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-03-05 18:27:26 +05:30 · 2026-03-05 18:27:26 +05:30 · 4fb81ea93e
parent 125a7cdcc2
commit 4fb81ea93e
2 changed files with 203 additions and 3 deletions
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@ -63,10 +63,10 @@ Plans:
  2. JKSessionRemoteTracks wrapped with React.memo
  3. Track components only re-render when their specific track data changes
  4. React DevTools shows stable render counts for memoized components
-**Plans**: TBD
+**Plans**: 1 plan

 Plans:
- [ ] 30-01: TBD
+- [ ] 30-01-PLAN.md — Wrap JKSessionAudioInputs and JKSessionRemoteTracks with React.memo

 ### Phase 31: Selector Optimization
 **Goal**: Redux selectors compute efficiently with memoization
@ -105,7 +105,7 @@ Plans:
 |-------|-----------|----------------|--------|-----------|
 | 28. VU Meter Optimization | v1.7 | 2/2 | ✓ Complete | 2026-03-05 |
 | 29. Context Optimization | v1.7 | 1/1 | ✓ Complete | 2026-03-05 |
-| 30. Component Memoization | v1.7 | 0/TBD | Not started | - |
+| 30. Component Memoization | v1.7 | 0/1 | Planned | - |
 | 31. Selector Optimization | v1.7 | 0/TBD | Not started | - |
 | 32. State Update Optimization | v1.7 | 0/TBD | Not started | - |

--- a/.planning/phases/30-component-memoization/30-01-PLAN.md
+++ b/.planning/phases/30-component-memoization/30-01-PLAN.md
@ -0,0 +1,200 @@
+---
+phase: 30-component-memoization
+plan: 01
+type: execute
+wave: 1
+depends_on: []
+files_modified:
+  - jam-ui/src/components/client/JKSessionAudioInputs.js
+  - jam-ui/src/components/client/JKSessionRemoteTracks.js
+autonomous: true
+
+must_haves:
+  truths:
+    - "JKSessionAudioInputs does not re-render when parent re-renders with same props"
+    - "JKSessionRemoteTracks does not re-render when parent re-renders with same props"
+    - "Track components only re-render when their specific track data changes"
+    - "React DevTools shows components as 'Memo' with displayName"
+  artifacts:
+    - path: "jam-ui/src/components/client/JKSessionAudioInputs.js"
+      provides: "Memoized audio inputs container"
+      contains: "memo(function JKSessionAudioInputs"
+    - path: "jam-ui/src/components/client/JKSessionRemoteTracks.js"
+      provides: "Memoized remote tracks container"
+      contains: "memo(function JKSessionRemoteTracks"
+  key_links:
+    - from: "jam-ui/src/components/client/JKSessionScreen.js"
+      to: "JKSessionAudioInputs"
+      via: "stable props from memoized context"
+      pattern: "<JKSessionAudioInputs"
+    - from: "jam-ui/src/components/client/JKSessionScreen.js"
+      to: "JKSessionRemoteTracks"
+      via: "stable props from memoized context"
+      pattern: "<JKSessionRemoteTracks"
+---
+
+<objective>
+Wrap JKSessionAudioInputs and JKSessionRemoteTracks with React.memo to prevent unnecessary re-renders when parent components re-render with unchanged props.
+
+Purpose: Complete the component memoization chain started in Phase 29. These container components sit between JKSessionScreen (parent) and the already-memoized child components (JKSessionMyTrack, SessionTrackVU, SessionTrackGain). Without memoization, parent re-renders cascade through these containers even when props haven't changed.
+
+Output: Two memoized container components that skip re-renders when props are shallowly equal.
+</objective>
+
+<execution_context>
+@/Users/nuwan/.claude/get-shit-done/workflows/execute-plan.md
+@/Users/nuwan/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/30-component-memoization/30-RESEARCH.md
+@.planning/phases/29-context-optimization/29-01-SUMMARY.md
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Wrap JKSessionAudioInputs with React.memo</name>
+  <files>jam-ui/src/components/client/JKSessionAudioInputs.js</files>
+  <action>
+Wrap JKSessionAudioInputs with React.memo following the Phase 29 pattern:
+
+1. Add `memo` to the React import:
+   ```javascript
+   import React, { memo } from 'react';
+   ```
+
+2. Wrap the component definition with memo using named function expression:
+   ```javascript
+   const JKSessionAudioInputs = memo(function JKSessionAudioInputs({
+     myTracks,
+     chat,
+     mixerHelper,
+     isRemote = false,
+     mixType = 'default'
+   }) {
+     // existing implementation unchanged
+   });
+   ```
+
+3. Add displayName after the component definition (before export):
+   ```javascript
+   JKSessionAudioInputs.displayName = 'JKSessionAudioInputs';
+   ```
+
+4. Keep the existing `export default JKSessionAudioInputs;` unchanged.
+
+Note: Props are already stable from Phase 29 context memoization. Default shallow comparison is sufficient - do NOT add custom comparison function.
+  </action>
+  <verify>
+Run syntax check:
+```bash
+cd jam-ui && node -c src/components/client/JKSessionAudioInputs.js
+```
+Verify memo wrapper present:
+```bash
+grep -n "memo(function JKSessionAudioInputs" jam-ui/src/components/client/JKSessionAudioInputs.js
+```
+Verify displayName present:
+```bash
+grep -n "displayName = 'JKSessionAudioInputs'" jam-ui/src/components/client/JKSessionAudioInputs.js
+```
+  </verify>
+  <done>
+JKSessionAudioInputs.js contains:
+- `import React, { memo } from 'react'`
+- `memo(function JKSessionAudioInputs` wrapper
+- `displayName = 'JKSessionAudioInputs'`
+- Syntax check passes
+  </done>
+</task>
+
+<task type="auto">
+  <name>Task 2: Wrap JKSessionRemoteTracks with React.memo</name>
+  <files>jam-ui/src/components/client/JKSessionRemoteTracks.js</files>
+  <action>
+Wrap JKSessionRemoteTracks with React.memo following the same pattern:
+
+1. Update the React import to add `memo`:
+   ```javascript
+   import React, { useMemo, memo } from 'react';
+   ```
+
+2. Wrap the component definition with memo using named function expression:
+   ```javascript
+   const JKSessionRemoteTracks = memo(function JKSessionRemoteTracks({
+     mixerHelper,
+     sessionModel
+   }) {
+     // existing implementation unchanged (includes useMemo for remoteParticipantsData)
+   });
+   ```
+
+3. Add displayName after the component definition (before export):
+   ```javascript
+   JKSessionRemoteTracks.displayName = 'JKSessionRemoteTracks';
+   ```
+
+4. Keep the existing `export default JKSessionRemoteTracks;` unchanged.
+
+Note: This component already uses useMemo internally for remoteParticipantsData. The memo wrapper prevents re-renders when mixerHelper and sessionModel props haven't changed.
+  </action>
+  <verify>
+Run syntax check:
+```bash
+cd jam-ui && node -c src/components/client/JKSessionRemoteTracks.js
+```
+Verify memo wrapper present:
+```bash
+grep -n "memo(function JKSessionRemoteTracks" jam-ui/src/components/client/JKSessionRemoteTracks.js
+```
+Verify displayName present:
+```bash
+grep -n "displayName = 'JKSessionRemoteTracks'" jam-ui/src/components/client/JKSessionRemoteTracks.js
+```
+  </verify>
+  <done>
+JKSessionRemoteTracks.js contains:
+- `import React, { useMemo, memo } from 'react'`
+- `memo(function JKSessionRemoteTracks` wrapper
+- `displayName = 'JKSessionRemoteTracks'`
+- Syntax check passes
+  </done>
+</task>
+
+</tasks>
+
+<verification>
+After both tasks complete:
+
+1. **Syntax verification** (automated):
+   ```bash
+   cd jam-ui && node -c src/components/client/JKSessionAudioInputs.js && node -c src/components/client/JKSessionRemoteTracks.js
+   ```
+
+2. **Pattern verification** (automated):
+   ```bash
+   grep -l "memo(function" jam-ui/src/components/client/JKSession{AudioInputs,RemoteTracks}.js | wc -l
+   # Expected: 2
+   ```
+
+3. **Manual verification** (optional - user can verify with React DevTools):
+   - Open session screen in browser
+   - Open React DevTools Profiler tab
+   - Record while triggering parent re-render (e.g., toggle a setting)
+   - Check JKSessionAudioInputs and JKSessionRemoteTracks show "Did not render" when props unchanged
+</verification>
+
+<success_criteria>
+- Both components wrapped with React.memo using named function expression pattern
+- Both components have displayName set for React DevTools visibility
+- Syntax checks pass for both files
+- Components will skip re-renders when props are shallowly equal (verifiable with DevTools)
+</success_criteria>
+
+<output>
+After completion, create `.planning/phases/30-component-memoization/30-01-SUMMARY.md`
+</output>