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feat(phase-1): persistent generation library

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- Save every completed generation to SQLite (generation_store.py) with
  WAV and waveform peaks written to data/generations/<id>/
- Deferred DB write until success — cancelled/errored generations never
  touch the DB and never appear in the library
- Fixed cancel+regenerate IndexError: _reset_scheduler_caches() now
  directly zeros scheduler._step_index and running state in addition to
  clearing VibePod cache dicts; same explicit resets added in the fresh
  path of prepare_noise_scheduler as belt-and-suspenders
- Added /library page with GenerationCard, WaveformPreview, waveform
  fetch, play/pause, download, delete, pagination, empty + error states
- Added generation API routes (list, single, audio stream, waveform,
  delete) proxying to Python server
- Added Library nav link to Header with active state
- Persist script/speaker/CFG to localStorage so generate page state
  survives navigation
- Updated build plan: Phase 0+1 ticked off, better-sqlite3 moved to
  Phase 2, architectural note on Python owning all persistence
This commit is contained in:
LyAhn
2026-05-02 23:05:11 +01:00
parent 47e0c7e512
commit 13085166fb
13 changed files with 913 additions and 29 deletions
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docs/studio-build-plan.md
+23 -23
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@@ -137,7 +137,7 @@ Build inside the existing stack. New packages require a written reason in this d
|---|---|---|
| `zustand` | Studio editor state | Phase 2 |
| `@dnd-kit/core` + `@dnd-kit/utilities` | Clip drag-and-drop in timeline | Phase 2 |
| `better-sqlite3` | SQLite for job and project persistence | Phase 1 |
| `better-sqlite3` | SQLite for project/studio persistence (Next.js layer) | Phase 2 |
**Conditionally approved (evaluate at phase start):**
@@ -712,11 +712,11 @@ Render runs in a background thread. The client polls `GET /api/projects/:id/rend
**Goal:** Clean foundation. No new features.
Tasks:
- [ ] Extract WAV assembly from `useStreamingGeneration.ts` into `web/lib/audio/wav.ts`
- [ ] Extract waveform peak generation into `server/waveform.py`
- [ ] Confirm generation cancellation works cleanly (stream abort + server cancel_event)
- [ ] Add `nanoid` to backend for stable generation IDs
- [ ] Add `data/` directory to `.gitignore`
- [x] Extract WAV assembly from `useStreamingGeneration.ts` into `web/lib/audio/wav.ts`
- [x] Extract waveform peak generation into `server/waveform.py`
- [x] Confirm generation cancellation works cleanly (stream abort + server cancel_event)
- [x] Add stable generation IDs to backend (`server/ids.py` via `secrets.token_urlsafe`)
- [x] Add `data/` directory to `.gitignore`
**Acceptance:** WAV assembly is a pure function with unit tests. Generation IDs are stable.
@@ -727,25 +727,23 @@ Tasks:
**Goal:** Every generation is saved. Users can browse, play, and download past generations.
**Backend tasks:**
- [ ] Add SQLite setup (`data/db/vibepod.db`, schema migration 001)
- [ ] `generations` table: `id, created_at, status, script, speaker, cfg_scale, inference_steps, duration_secs, sample_rate, audio_path, waveform_path, error_message`
- [ ] On generation complete: save WAV to `data/generations/<id>/audio.wav`
- [ ] On generation complete: compute and save waveform peaks to `data/generations/<id>/waveform.json`
- [ ] Implement `GET /api/generations` (list, paginated)
- [ ] Implement `GET /api/generations/:id` (single)
- [ ] Implement `GET /api/generations/:id/audio` (stream file)
- [ ] Implement `GET /api/generations/:id/waveform` (peaks JSON)
- [ ] Implement `DELETE /api/generations/:id` (delete row + files)
- [x] Add SQLite setup (`data/db/vibepod.db`)
- [x] `generations` table: `id, created_at, status, script, speaker, cfg_scale, inference_steps, duration_secs, sample_rate, audio_path, waveform_path, error_message`
- [x] On generation complete: save WAV to `data/generations/<id>/audio.wav`
- [x] On generation complete: compute and save waveform peaks to `data/generations/<id>/waveform.json`
- [x] Implement `GET /api/generations` (list, paginated)
- [x] Implement `GET /api/generations/:id` (single)
- [x] Implement `GET /api/generations/:id/audio` (stream file)
- [x] Implement `GET /api/generations/:id/waveform` (peaks JSON)
- [x] Implement `DELETE /api/generations/:id` (delete row + files)
**Frontend tasks:**
- [ ] Install `better-sqlite3` + types
- [ ] Create `web/lib/db/` — schema, migration runner, query helpers
- [ ] Create `/library` route and `LibraryPage` component
- [ ] `GenerationCard` component: waveform preview canvas, metadata, play/download/delete actions
- [ ] `WaveformPreview` component: draws peaks on canvas (static, no playback)
- [ ] Mini audio player for library card playback (reuse `useAudioPlayer` hook)
- [ ] Link "Open in Studio" button (navigates to `/studio/new?fromGeneration=<id>`)
- [ ] Add "Library" link to `Header`
- [x] Create `/library` route and `LibraryPage` component
- [x] `GenerationCard` component: waveform preview canvas, metadata, play/download/delete actions
- [x] `WaveformPreview` component: draws peaks on canvas (static, no playback)
- [x] Mini audio player for library card playback
- [ ] Link "Open in Studio" button (navigates to `/studio/new?fromGeneration=<id>`) — deferred to Phase 2
- [x] Add "Library" link to `Header`
**Acceptance:**
- Generate audio → close browser → reopen → generation appears in library with waveform
@@ -771,6 +769,8 @@ Tasks:
- [ ] Implement basic render endpoint (single voice track, WAV out only)
**Frontend tasks:**
- [ ] Install `better-sqlite3` + types
- [ ] Create `web/lib/db/` — schema, migration runner, query helpers
- [ ] Install `zustand`, `@dnd-kit/core`, `@dnd-kit/utilities`
- [ ] Create Studio Zustand store (`web/stores/studioStore.ts`)
- Project state, selected clip, playhead time, zoom, isPlaying, undo stack