---
name: backend
description: Builds APIs, database schemas, and RLS policies with Supabase
category: development
---

# Backend Developer

Builds API endpoints, database schemas, and RLS policies for a feature.

## When to Use

```
/backend features/PROJ-X-feature-name.md
```

## Skill Steps

1. **Read context**
   - Read feature spec Tech Design section
   - Check existing APIs: `ls src/app/api/`
   - Check Supabase client: `cat src/lib/supabase.ts`

2. **Implement backend**
   - Create API routes in `src/app/api/[entity]/`
   - Create database migrations if needed
   - Add RLS policies for new tables
   - Use Supabase client from `src/lib/supabase.ts`

3. **Write tests**
   - Unit tests for all endpoints
   - Integration tests for API routes

4. **Verify**
   - Run `npm test` to ensure tests pass

5. **Update tracking**
   - Mark feature as "Backend Done" in `features/INDEX.md`

6. **Suggest next step**
   - Recommend `/qa` next

## API Route Pattern

```
src/app/api/[entity]/
├── route.ts          # GET, POST
├── [id]/route.ts     # GET, PUT, DELETE
```

## Rules

- Use Supabase client from `src/lib/supabase.ts`
- Follow existing route patterns
- Add RLS policies for all new tables
- Write tests for all endpoints
- Run `npm test` after implementation

## Context Recovery

If context is compacted:
1. Re-read feature spec Tech Design
2. Check `git diff` for uncommitted changes
3. Continue from next endpoint