---
id: T01
parent: S03
milestone: M017
provides: []
requires: []
affects: []
key_files: ["backend/schemas.py", "backend/routers/creators.py"]
key_decisions: ["Used correlated scalar subquery for key_moment_count rather than JOIN+GROUP BY to keep existing row-based iteration pattern intact"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "Ran schema field assertion: all three new fields (summary, topic_tags, key_moment_count) present alongside original four fields (title, slug, topic_category, created_at). Exit code 0."
completed_at: 2026-04-03T09:07:31.302Z
blocker_discovered: false
---

# T01: Added summary, topic_tags, and key_moment_count fields to CreatorTechniqueItem and enriched the creator detail query with a correlated KeyMoment count subquery

> Added summary, topic_tags, and key_moment_count fields to CreatorTechniqueItem and enriched the creator detail query with a correlated KeyMoment count subquery

## What Happened
---
id: T01
parent: S03
milestone: M017
key_files:
  - backend/schemas.py
  - backend/routers/creators.py
key_decisions:
  - Used correlated scalar subquery for key_moment_count rather than JOIN+GROUP BY to keep existing row-based iteration pattern intact
duration: ""
verification_result: passed
completed_at: 2026-04-03T09:07:31.302Z
blocker_discovered: false
---

# T01: Added summary, topic_tags, and key_moment_count fields to CreatorTechniqueItem and enriched the creator detail query with a correlated KeyMoment count subquery

**Added summary, topic_tags, and key_moment_count fields to CreatorTechniqueItem and enriched the creator detail query with a correlated KeyMoment count subquery**

## What Happened

Added three new optional fields to CreatorTechniqueItem in backend/schemas.py: summary (str|None), topic_tags (list[str]|None), and key_moment_count (int, default 0). Updated the creator detail endpoint in backend/routers/creators.py to select TechniquePage.summary and TechniquePage.topic_tags, and added a correlated scalar subquery counting KeyMoment rows per technique page. Imported KeyMoment model. All existing fields remain unchanged.

## Verification

Ran schema field assertion: all three new fields (summary, topic_tags, key_moment_count) present alongside original four fields (title, slug, topic_category, created_at). Exit code 0.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd backend && python -c "from schemas import CreatorTechniqueItem; fields = list(CreatorTechniqueItem.model_fields.keys()); assert 'summary' in fields and 'topic_tags' in fields and 'key_moment_count' in fields; print('OK')"` | 0 | ✅ pass | 500ms |


## Deviations

None.

## Known Issues

None.

## Files Created/Modified

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


## Deviations
None.

## Known Issues
None.
