---
id: S03
parent: M017
milestone: M017
provides:
  - Enriched CreatorTechniqueItem with summary, topic_tags, key_moment_count
  - Featured technique card component pattern on creator page
  - recent-card class usage on creator technique grid
requires:
  - slice: S01
    provides: Creator detail page with hero section and technique list rendering
affects:
  - S04
key_files:
  - backend/schemas.py
  - backend/routers/creators.py
  - frontend/src/api/public-client.ts
  - frontend/src/pages/CreatorDetail.tsx
  - frontend/src/App.css
key_decisions:
  - Used correlated scalar subquery for key_moment_count rather than JOIN+GROUP BY to preserve row-iteration pattern
  - Null-check guard + IIFE for featured technique to satisfy strict TS noUncheckedIndexedAccess
patterns_established:
  - Featured card extraction: split sorted array into [first, ...rest], render first with distinct treatment
observability_surfaces:
  - none
drill_down_paths:
  - .gsd/milestones/M017/slices/S03/tasks/T01-SUMMARY.md
  - .gsd/milestones/M017/slices/S03/tasks/T02-SUMMARY.md
duration: ""
verification_result: passed
completed_at: 2026-04-03T09:11:12.679Z
blocker_discovered: false
---

# S03: Featured Technique + Technique Grid Restyle

**Added featured technique card with gradient border and restyled all technique cards on creator detail page with summary, tags, and moment count.**

## What Happened

Two tasks: backend enrichment (T01) and frontend rendering (T02).

T01 added three fields to `CreatorTechniqueItem` — `summary` (str|None), `topic_tags` (list[str]|None), `key_moment_count` (int, default 0) — and updated the creator detail endpoint query to select them. The moment count uses a correlated scalar subquery against KeyMoment, keeping the existing row-iteration pattern intact.

T02 consumed the enriched data on the frontend. The `CreatorTechniqueItem` TypeScript interface was extended to match. CreatorDetail.tsx now splits techniques into a featured card (first technique) and a grid of remaining cards. The featured card renders with a gradient border-image (cyan→purple at 135°), summary text, category badge, TagList, and moment count. Grid cards use the `recent-card` class pattern with the same enriched fields. CSS was added in App.css under `.creator-featured` and its sub-classes.

One minor deviation: T02 added a null-check guard + IIFE for the featured technique extraction to satisfy Vite's `noUncheckedIndexedAccess` strictness.

## Verification

All slice-level verification checks passed:
1. Backend schema assertion: `CreatorTechniqueItem` has all 7 fields (title, slug, topic_category, created_at, summary, topic_tags, key_moment_count) — exit 0
2. `npx tsc --noEmit` — exit 0, zero type errors
3. `npm run build` — exit 0, production bundle built (279KB JS, 90KB CSS)
4. `grep -q 'creator-featured'` — confirmed in CreatorDetail.tsx
5. `grep -q 'recent-card'` — confirmed in CreatorDetail.tsx

## Requirements Advanced

None.

## Requirements Validated

None.

## New Requirements Surfaced

None.

## Requirements Invalidated or Re-scoped

None.

## Deviations

T02 added null-check guard + IIFE for featured technique to satisfy strict noUncheckedIndexedAccess in Vite TS config. No functional impact.

## Known Limitations

border-image strips border-radius on the featured card (known CSS limitation, documented in KNOWLEDGE.md). Featured technique is always the first in sort order — no admin override to pick a specific featured technique.

## Follow-ups

None.

## Files Created/Modified

- `backend/schemas.py` — Added summary, topic_tags, key_moment_count fields to CreatorTechniqueItem
- `backend/routers/creators.py` — Enriched creator detail query with summary, topic_tags selection and correlated KeyMoment count subquery
- `frontend/src/api/public-client.ts` — Extended CreatorTechniqueItem interface with summary, topic_tags, key_moment_count
- `frontend/src/pages/CreatorDetail.tsx` — Featured technique card + recent-card grid restyle with enriched fields
- `frontend/src/App.css` — Added .creator-featured CSS with gradient border and sub-class styles
