---
phase: 09-video-history
plan: 01
subsystem: ui
tags: [react, zustand, carousel, video, history]

# Dependency graph
requires:
  - phase: 06-video-polish
    provides: GenerateVideoNode, video generation execution
  - phase: 08-error-display
    provides: Error overlay pattern in generate nodes
provides:
  - Video history carousel matching image history pattern
  - Multi-format load-generation API (images + videos)
  - CarouselVideoItem type for video history tracking
affects: [video-generation, node-autosizing]

# Tech tracking
tech-stack:
  added: []
  patterns: [video history carousel mirroring image pattern]

key-files:
  created: []
  modified:
    - src/types/index.ts
    - src/store/workflowStore.ts
    - src/app/api/load-generation/route.ts
    - src/components/nodes/GenerateVideoNode.tsx
    - src/lib/quickstart/validation.ts

key-decisions:
  - "Use same carousel pattern as GenerateImageNode for consistency"
  - "Store videoHistory as array of CarouselVideoItem with IDs for lazy loading"
  - "Multi-format load-generation API searches all supported extensions"
  - "Video files saved with timestamp ID like images for carousel support"

patterns-established:
  - "Video history carousel: same UI/UX as image carousel"
  - "Content-type detection in load-generation API based on file extension"

issues-created: []

# Metrics
duration: 12min
completed: 2026-01-12
---

# Phase 9: Video History Summary

**Video history carousel with prev/next navigation for GenerateVideoNode, matching the existing image history pattern**

## Performance

- **Duration:** 12 min
- **Started:** 2026-01-12T15:30:00Z
- **Completed:** 2026-01-12T15:42:00Z
- **Tasks:** 3
- **Files modified:** 5

## Accomplishments
- Added CarouselVideoItem type and videoHistory fields to GenerateVideoNodeData
- Updated load-generation API to support multiple formats (png, jpg, jpeg, webp, gif, mp4, webm, mov)
- Added carousel controls to GenerateVideoNode matching GenerateImageNode pattern
- Videos now persist to generations folder with IDs for carousel navigation

## Task Commits

Each task was committed atomically:

1. **Task 1: Add video history types and store support** - `bcc9108` (feat)
2. **Task 2: Update load-generation API for video formats** - `62964c3` (feat)
3. **Task 3: Add carousel controls to GenerateVideoNode** - `198319e` (feat)

**Plan metadata:** (pending)

## Files Created/Modified
- `src/types/index.ts` - Added CarouselVideoItem type and videoHistory fields to GenerateVideoNodeData
- `src/store/workflowStore.ts` - Added default values and history tracking in executeWorkflow/regenerateNode
- `src/app/api/load-generation/route.ts` - Multi-format support with extension search and content type detection
- `src/components/nodes/GenerateVideoNode.tsx` - Carousel UI, navigation handlers, loading state
- `src/lib/quickstart/validation.ts` - Added videoHistory fields to generateVideo case

## Decisions Made
- Used same carousel UX pattern as GenerateImageNode for consistency
- Limit video history to 50 items (same as image history)
- Return appropriate response field (video vs image) based on actual file type
- Include contentType field in API response for explicit type indication

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Fixed validation.ts missing videoHistory fields**
- **Found during:** Task 3 (build verification)
- **Issue:** validation.ts had duplicate createDefaultNodeData that was missing new videoHistory fields
- **Fix:** Added videoHistory: [] and selectedVideoHistoryIndex: 0 to validation.ts
- **Files modified:** src/lib/quickstart/validation.ts
- **Verification:** npm run build passes
- **Committed in:** 198319e (Task 3 commit)

### Deferred Enhancements

None - all planned functionality implemented.

---

**Total deviations:** 1 auto-fixed (blocking build error), 0 deferred
**Impact on plan:** Auto-fix necessary for TypeScript compilation. No scope creep.

## Issues Encountered
None - plan executed as specified.

## Next Phase Readiness
- Video history works identically to image history
- Ready for Phase 10 (Node Autosizing)
- Carousel UI may need adjustment when node autosizing is implemented

---
*Phase: 09-video-history*
*Completed: 2026-01-12*