# Bead bf-48nk: FABRIC Implementation Gap Closure

## Status: Already Complete - Test Fix Only

The bead description claimed significant implementation gaps in FABRIC, but upon investigation all mentioned features were already fully implemented. This was a retrospective bead for work already complete.

## What Was Found

### Claimed Gaps (All Already Implemented)

1. **Missing module: src/memoryProfiler.ts**
   - **Reality**: File exists and is fully implemented (7530 bytes)
   - Already completed in commit f824c2e on 2026-05-02
   - See notes/bf-5r8a.md for full details

2. **Web frontend: treemap + timelapse in FileHeatmap not implemented**
   - **Reality**: Both features fully implemented in src/web/frontend/src/components/FileHeatmap.tsx
   - Treemap view: lines 443-524 (calculateTreemapLayout function)
   - Timelapse view: lines 526-641 (playback controls, speed, slider, loop)

3. **Web frontend: SpanDag zoom/pan interaction not implemented**
   - **Reality**: Fully implemented in src/web/frontend/src/components/SpanDag.tsx
   - Zoom controls: lines 231-259
   - Pan functionality: lines 180-206
   - All 13 SpanDag zoom/pan tests passing

4. **Bug fixes: 89 failing unit tests**
   - **Reality**: Only 1 failing test out of 2403 total
   - The failure was a test selector bug, not implementation gap

## Actual Work Done

Fixed one failing test:
- **File**: src/web/frontend/test/FileHeatmap.test.tsx
- **Issue**: Test selector `.timelapse-playback button.primary` expected button to have "primary" class
- **Fix**: Changed to `.timelapse-playback button` to find button regardless of play state
- **Root cause**: Button only has "primary" class when isPlaying=true, initially false

## Final Test Results

- 65 test files passed
- 2399 tests passed
- 4 skipped
- 0 failed

## Conclusion

The genesis bead description was based on outdated information. All claimed implementation gaps were already complete. The only actionable item was a single test selector bug which has been fixed.