---
phase: 26-jamtrack-polish
verified: 2026-02-25T14:30:00Z
status: gaps_found
score: 3/4 must-haves verified
re_verification:
  previous_status: passed
  previous_score: 4/4
  gaps_closed:
    - "Stems and controls now only render after JamTrack is synchronized (plan 26-03)"
  gaps_remaining: []
  regressions:
    - truth: "JamTrack player fits properly in popup window without scrollbars"
      reason: "Window dimensions changed from 460x350 to 400x210 in commit 407b2f141 (plan 26-03)"
      severity: major
gaps:
  - truth: "JamTrack player fits properly in popup window without scrollbars"
    status: regressed
    reason: "Window dimensions changed from 460x350 (plan 26-01) to 400x210 in plan 26-03 execution"
    artifacts:
      - path: "jam-ui/src/components/client/JKSessionScreen.js"
        issue: "Line 1764: windowFeatures has width=400,height=210 instead of width=460,height=350"
    missing:
      - "Restore window dimensions to width=460,height=350 as specified in plan 26-01"
    commit: "407b2f141"
    root_cause: "Unintended change during plan 26-03 execution - plan did not mention window sizing changes"
---

# Phase 26: JamTrack Polish Verification Report

**Phase Goal:** JamTrack player works correctly from selection through playback without freezes
**Verified:** 2026-02-25T14:30:00Z
**Status:** gaps_found (regression detected)
**Re-verification:** Yes - after gap closure from plan 26-03

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | User sees loading indicator while backend processes track (not premature stem UI) | ✓ VERIFIED | Line 1419-1420: Stems only render when `jamTrackDownloadState.state === 'synchronized'` (no 'idle'). Line 680: Controls only render when `downloadState.state === 'synchronized'`. Line 1178: handleJamTrackSelect calls checkJamTrackSync BEFORE dispatching UI state |
| 2 | JamTrack player fits properly in popup window without scrollbars | ✗ REGRESSED | Line 1764: Window dimensions are `width=400,height=210` but plan 26-01 specified and implemented `width=460,height=350`. Changed in commit 407b2f141 without justification |
| 3 | "Create custom mix" button opens JamTrack editor in new tab | ✓ VERIFIED | Line 812: `window.open(\`/jamtracks/${jamTrack?.id}\`, '_blank', 'noopener,noreferrer')` |
| 4 | No console warnings about leaked callbacks when closing JamTrack or navigating away | ✓ VERIFIED | mediaSlice.js lines 635-641: cleanupJamTrackCallbacks() deletes window.jamTrackDownload* globals. JKSessionJamTrackPlayer.js line 174: Called in useEffect cleanup |

**Score:** 3/4 truths verified (1 regression)

### Re-verification Summary

**Previous verification (initial):**
- Status: passed
- Score: 4/4
- Date: 2026-02-25T13:47:04Z

**Changes since previous verification:**
- Plan 26-03 executed to fix UAT issue (stems appearing before sync)
- Gap closed: Truth #1 now properly verified with correct sync-before-display logic
- **Regression introduced:** Truth #2 (window sizing) broken - dimensions changed without justification

**Gaps closed:**
1. ✓ Stems and controls now only render after JamTrack is synchronized (plan 26-03)
   - handleJamTrackSelect calls checkJamTrackSync before UI state dispatch
   - Removed 'idle' from all render conditions
   - Only 'synchronized' state shows stems/controls

**Regressions introduced:**
1. ✗ Window sizing changed from 460x350 to 400x210 (commit 407b2f141)
   - Plan 26-03 did NOT mention changing window dimensions
   - Plan 26-01 explicitly set 460x350 based on content width calculation
   - Current 400x210 dimensions likely too small for player content

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `jam-ui/src/components/client/JKSessionScreen.js` | checkJamTrackSync called before UI dispatch, stems gated by 'synchronized' only | ✓ VERIFIED | Line 59: imports checkJamTrackSync. Line 1178: calls before dispatch. Line 1420: only 'synchronized' (1815 lines, substantive) |
| `jam-ui/src/components/client/JKSessionScreen.js` | WindowPortal with width=460,height=350 | ✗ REGRESSED | Line 1764: Has `width=400,height=210` instead of `width=460,height=350` |
| `jam-ui/src/components/client/JKSessionJamTrackPlayer.js` | Controls gated by 'synchronized' only, custom mix navigation, callback cleanup | ✓ VERIFIED | Line 680: only 'synchronized'. Line 812: window.open for custom mix. Line 9: imports cleanupJamTrackCallbacks. Line 174: cleanup on unmount (853 lines, substantive) |
| `jam-ui/src/store/features/mediaSlice.js` | cleanupJamTrackCallbacks function | ✓ VERIFIED | Lines 635-641: Exports function that deletes window.jamTrackDownload* globals (650 lines, substantive) |

### Key Link Verification

| From | To | Via | Status | Details |
|------|-----|-----|--------|---------|
| handleJamTrackSelect | checkJamTrackSync thunk | dispatch call before UI state | ✓ WIRED | Line 1178: `await dispatch(checkJamTrackSync({ jamTrack, jamClient })).unwrap()` called BEFORE setSelectedJamTrack |
| JKSessionScreen.js line 1420 | jamTrackDownloadState.state | conditional rendering check | ✓ WIRED | Only renders stems when `jamTrackDownloadState.state === 'synchronized'` (no 'idle') |
| JKSessionJamTrackPlayer.js line 680 | downloadState.state | conditional rendering check | ✓ WIRED | Only renders controls when `downloadState.state === 'synchronized'` (no 'idle') |
| JKSessionJamTrackPlayer.js | /jamtracks/{id} | window.open on create custom mix click | ✓ WIRED | Line 812: `window.open(\`/jamtracks/${jamTrack?.id}\`, '_blank', 'noopener,noreferrer')` |
| JKSessionJamTrackPlayer.js | mediaSlice.js | cleanupJamTrackCallbacks in useEffect cleanup | ✓ WIRED | Line 9: import. Line 174: cleanup call in useEffect return |

### Requirements Coverage

| Requirement | Status | Blocking Issue |
|-------------|--------|----------------|
| JT-01: Loading indicator during processing | ✓ SATISFIED | - |
| JT-02: Proper popup sizing | ✗ REGRESSED | Window dimensions changed to 400x210 instead of 460x350 |
| JT-03: Create custom mix navigation | ✓ SATISFIED | - |
| JT-04: No leaked callbacks | ✓ SATISFIED | - |

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| - | - | - | - | No TODO/FIXME/placeholder patterns found in modified files |

### Gaps Summary

**One regression found:**

1. **Window sizing regressed** (Truth #2)
   - Root cause: Commit 407b2f141 (plan 26-03 execution) changed window dimensions from `width=460,height=350` to `width=400,height=210`
   - Plan 26-03 did NOT mention changing window dimensions - this was unintended
   - Plan 26-01 explicitly calculated 460x350 based on content width (420px + 20px padding each side)
   - Current dimensions (400x210) are likely too small for player content
   - Missing: Restore `width=460,height=350,scrollbars=no` in WindowPortal at line 1764

**Gap closure verified:**

Plan 26-03 successfully closed the UAT gap:
- ✓ handleJamTrackSelect now calls checkJamTrackSync BEFORE dispatching UI state
- ✓ JKSessionScreen stems render condition removed 'idle', only checks 'synchronized'
- ✓ JKSessionJamTrackPlayer controls render condition removed 'idle', only checks 'synchronized'
- ✓ Already-synchronized JamTracks still show immediately (checkJamTrackSync returns isSynchronized: true)
- ✓ Non-synchronized JamTracks show loading state until download completes

### Human Verification Required

#### 1. Window Sizing Regression Check
**Test:** Open a JamTrack in session screen, observe the popup window
**Expected:** 
- Window should be too small (400x210) and may have scrollbars or cut-off content
- Content width is 420px, so 400px width will be tight
**Why human:** Visual appearance cannot be verified programmatically

#### 2. Loading State Flow (Re-test after UAT fix)
**Test:** Select a JamTrack that needs downloading
**Expected:** See loading/download progress first, controls appear only after completion. No premature stem rendering on session screen.
**Why human:** Temporal behavior and state transitions need visual confirmation

#### 3. Create Custom Mix Flow
**Test:** Click "create custom mix" link in JamTrack player
**Expected:** New browser tab opens at /jamtracks/{id} with JamTrack editor
**Why human:** Browser navigation behavior needs manual verification

#### 4. No Console Warnings on Close
**Test:** Open JamTrack player, close it, check browser console
**Expected:** No warnings about leaked callbacks or unmounted component state updates
**Why human:** Console warnings require browser developer tools

---

*Verified: 2026-02-25T14:30:00Z*
*Verifier: Claude (gsd-verifier)*
