# BRIEFING — 2026-06-28T19:42:24-04:00

## Mission
Implement the `update_category_image` feature in the categories backend route and the MCP server.

## 🔒 My Identity
- Archetype: teamwork_preview_worker
- Roles: implementer, qa, specialist
- Working directory: /home/ti/git/homaroma/.agents/teamwork_preview_worker_m1_2
- Original parent: f0dc21e1-9715-45da-a5b2-12e1b082fdff
- Milestone: m1_2

## 🔒 Key Constraints
- CODE_ONLY network mode. No HTTP client targeting external URLs.
- Implement genuine logic, no hardcoding, no dummy/facade implementations.
- Write/update BRIEFING.md, progress.md, handoff.md.

## Current Parent
- Conversation ID: f0dc21e1-9715-45da-a5b2-12e1b082fdff
- Updated: not yet

## Task Summary
- **What to build**: Add PATCH /:id/image route in apps/backend/src/routes/categories.ts and register/handle update_category_image tool in apps/mcp-server/index.ts.
- **Success criteria**: API route works, MCP tool works, builds pass without TypeScript compilation errors.
- **Interface contracts**: apps/backend/src/routes/categories.ts & apps/mcp-server/index.ts
- **Code layout**: apps/backend/src, apps/mcp-server/src

## Key Decisions Made
- Added a PATCH `/categories/:id/image` route in the backend rather than using PUT to make updates fine-grained and avoid sending full model data.
- Added `update_category_image` tool schema and handler in the MCP server.
- Wrote integration tests verifying the PATCH route directly via Elysia and testing the MCP server via JSON-RPC stdio.

## Change Tracker
- **Files modified**:
  - `apps/backend/src/routes/categories.ts`: Added PATCH route.
  - `apps/mcp-server/index.ts`: Added MCP tool registration and case handler.
- **Build status**: Pass
- **Pending issues**: none

## Quality Status
- **Build/test result**: Pass. All packages (spa, backend, website, mcp-server) build and compile cleanly.
- **Lint status**: Clean (no TypeScript compilation errors).
- **Tests added/modified**:
  - `apps/backend/test_category_image.ts`: Elysia routes testing.
  - `apps/mcp-server/test_mcp_category_image.ts`: JSON-RPC subprocess tool testing.

## Loaded Skills
- **Source**: /home/ti/git/homaroma/.agents/skills/backend-mcp-lead/SKILL.md
- **Local copy**: /home/ti/git/homaroma/.agents/teamwork_preview_worker_m1_2/skills/backend-mcp-lead/SKILL.md
- **Core methodology**: Backend & MCP Lead Agent: API design, database schema alignment, MCP tool registration and handler implementation.

## Artifact Index
- /home/ti/git/homaroma/.agents/teamwork_preview_worker_m1_2/ORIGINAL_REQUEST.md — original request