---
id: T01
parent: S06
milestone: M014
provides: []
requires: []
affects: []
key_files: ["backend/routers/pipeline.py", "backend/schemas.py"]
key_decisions: ["Used correlated scalar subqueries for count fields rather than joins with GROUP BY for cleaner filter composition"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "Schema import verified inside Docker container. Endpoint returns valid JSON with 20 pages. multi_source_only=true returns 0 (correct — empty association table). creator=skope returns 2. Alpha sort returns correctly ordered titles. Pagination with offset=5&limit=2 returns 2 items with total=20."
completed_at: 2026-04-03T01:55:31.738Z
blocker_discovered: false
---

# T01: Added paginated GET /admin/pipeline/technique-pages endpoint with source video counts, version counts, and multi-source/creator/sort filters

> Added paginated GET /admin/pipeline/technique-pages endpoint with source video counts, version counts, and multi-source/creator/sort filters

## What Happened
---
id: T01
parent: S06
milestone: M014
key_files:
  - backend/routers/pipeline.py
  - backend/schemas.py
key_decisions:
  - Used correlated scalar subqueries for count fields rather than joins with GROUP BY for cleaner filter composition
duration: ""
verification_result: passed
completed_at: 2026-04-03T01:55:31.739Z
blocker_discovered: false
---

# T01: Added paginated GET /admin/pipeline/technique-pages endpoint with source video counts, version counts, and multi-source/creator/sort filters

**Added paginated GET /admin/pipeline/technique-pages endpoint with source video counts, version counts, and multi-source/creator/sort filters**

## What Happened

Added AdminTechniquePageItem and AdminTechniquePageListResponse Pydantic schemas to backend/schemas.py. Added the endpoint in backend/routers/pipeline.py using correlated scalar subqueries against technique_page_videos and technique_page_versions for count fields. Supports multi_source_only, creator slug filter, sort (recent/alpha/creator), and offset/limit pagination. Deployed to ub01 via docker compose rebuild and verified all filters and pagination work correctly.

## Verification

Schema import verified inside Docker container. Endpoint returns valid JSON with 20 pages. multi_source_only=true returns 0 (correct — empty association table). creator=skope returns 2. Alpha sort returns correctly ordered titles. Pagination with offset=5&limit=2 returns 2 items with total=20.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `docker exec chrysopedia-api python -c 'from schemas import AdminTechniquePageItem...'` | 0 | ✅ pass | 1000ms |
| 2 | `curl -sf http://ub01:8096/api/v1/admin/pipeline/technique-pages | python3 -c 'assert items in d'` | 0 | ✅ pass | 1000ms |
| 3 | `curl -sf ...?multi_source_only=true` | 0 | ✅ pass | 1000ms |
| 4 | `curl -sf ...?creator=skope` | 0 | ✅ pass | 1000ms |
| 5 | `curl -sf ...?sort=alpha&limit=3` | 0 | ✅ pass | 1000ms |
| 6 | `curl -sf ...?offset=5&limit=2` | 0 | ✅ pass | 1000ms |


## Deviations

Verified schema import inside Docker rather than on host (pydantic not installed on host).

## Known Issues

technique_page_videos and technique_page_versions tables are empty so counts are always 0. Queries are correct and will return real counts when populated.

## Files Created/Modified

- `backend/routers/pipeline.py`
- `backend/schemas.py`


## Deviations
Verified schema import inside Docker rather than on host (pydantic not installed on host).

## Known Issues
technique_page_videos and technique_page_versions tables are empty so counts are always 0. Queries are correct and will return real counts when populated.
