# Project: update_category_image

## Architecture
- Database Schema: `Category` model in Prisma has an `imageUrl` field.
- Backend API: `apps/backend/src/routes/categories.ts` handles category operations.
- MCP Server: `apps/mcp-server/index.ts` exposes MCP tools to agents.

## Milestones
| # | Name | Scope | Dependencies | Status |
|---|------|-------|-------------|--------|
| M1 | Backend Implementation | Expose `PATCH /api/categories/:id/image` in `apps/backend/src/routes/categories.ts` | None | DONE |
| M2 | MCP Tool Implementation | Add `update_category_image` tool schema and handler in `apps/mcp-server/index.ts` | M1 | DONE |
| M3 | Verification & Auditing | Compile the monorepo, test the tool end-to-end, and run Forensic Auditor. | M2 | DONE |

## Interface Contracts
### Backend API
- `PATCH /api/categories/:id/image`
  - Body: `{ imageUrl: string }`
  - Response: Updated Category object

### MCP Tool Schema
- Name: `update_category_image`
- Input Schema:
  - `id`: number (required)
  - `imageUrl`: string (required)

## Code Layout
- Backend routes: `apps/backend/src/routes/categories.ts`
- MCP server: `apps/mcp-server/index.ts`