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+# 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