---
id: T01
parent: S05
milestone: M001
provides: []
requires: []
affects: []
key_files: ["backend/search_service.py", "backend/schemas.py", "backend/routers/search.py", "backend/routers/techniques.py", "backend/routers/topics.py", "backend/routers/creators.py", "backend/main.py"]
key_decisions: ["Used asyncio.wait_for with 300ms timeout on both embedding and Qdrant calls for graceful degradation", "Qdrant query uses query_points() API with Filter for type-based scoping", "Topics endpoint loads canonical_tags.yaml at request time and counts tag matches from DB", "Creator list returns CreatorBrowseItem with correlated subqueries for technique/video counts"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "All five slice verification checks pass: SearchService imports clean, search/techniques/topics routers have routes, all routers mounted in main.py with correct paths. Full existing test suite (40 tests) passes."
completed_at: 2026-03-29T23:55:42.018Z
blocker_discovered: false
---

# T01: Created async search service with embedding+Qdrant+keyword fallback and all public API endpoints (search, techniques, topics, enhanced creators) mounted at /api/v1

> Created async search service with embedding+Qdrant+keyword fallback and all public API endpoints (search, techniques, topics, enhanced creators) mounted at /api/v1

## What Happened
---
id: T01
parent: S05
milestone: M001
key_files:
  - backend/search_service.py
  - backend/schemas.py
  - backend/routers/search.py
  - backend/routers/techniques.py
  - backend/routers/topics.py
  - backend/routers/creators.py
  - backend/main.py
key_decisions:
  - Used asyncio.wait_for with 300ms timeout on both embedding and Qdrant calls for graceful degradation
  - Qdrant query uses query_points() API with Filter for type-based scoping
  - Topics endpoint loads canonical_tags.yaml at request time and counts tag matches from DB
  - Creator list returns CreatorBrowseItem with correlated subqueries for technique/video counts
duration: ""
verification_result: passed
completed_at: 2026-03-29T23:55:42.018Z
blocker_discovered: false
---

# T01: Created async search service with embedding+Qdrant+keyword fallback and all public API endpoints (search, techniques, topics, enhanced creators) mounted at /api/v1

**Created async search service with embedding+Qdrant+keyword fallback and all public API endpoints (search, techniques, topics, enhanced creators) mounted at /api/v1**

## What Happened

Built the complete backend API surface for S05: SearchService with async embedding (300ms timeout) + Qdrant vector search + keyword ILIKE fallback, search/techniques/topics routers, enhanced creators router with sort=random (R014), genre filter, and technique/video counts. All mounted in main.py. Input validation handles empty queries, long queries (truncated to 500), and invalid scope (defaults to "all"). All 40 existing tests pass with zero regressions.

## Verification

All five slice verification checks pass: SearchService imports clean, search/techniques/topics routers have routes, all routers mounted in main.py with correct paths. Full existing test suite (40 tests) passes.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd backend && python -c "from search_service import SearchService; print('OK')"` | 0 | ✅ pass | 500ms |
| 2 | `cd backend && python -c "from routers.search import router; print(router.routes)"` | 0 | ✅ pass | 500ms |
| 3 | `cd backend && python -c "from routers.techniques import router; print(router.routes)"` | 0 | ✅ pass | 500ms |
| 4 | `cd backend && python -c "from routers.topics import router; print(router.routes)"` | 0 | ✅ pass | 500ms |
| 5 | `cd backend && python -c "from main import app; routes = [r.path for r in app.routes]; assert '/api/v1/search' in str(routes); print('Mounted')"` | 0 | ✅ pass | 500ms |
| 6 | `cd backend && python -m pytest tests/ -v` | 0 | ✅ pass (40/40) | 132000ms |


## Deviations

None.

## Known Issues

None.

## Files Created/Modified

- `backend/search_service.py`
- `backend/schemas.py`
- `backend/routers/search.py`
- `backend/routers/techniques.py`
- `backend/routers/topics.py`
- `backend/routers/creators.py`
- `backend/main.py`


## Deviations
None.

## Known Issues
None.
