---
description: NestJS API response format, feature modules, and Drizzle repository pattern
globs: "**/*.ts"
alwaysApply: false
---

# Common Patterns

## API Response Format

```typescript
interface ApiResponse<T> {
  success: boolean
  data?: T
  error?: string
  meta?: {
    total: number
    page: number
    limit: number
  }
}
```

## Feature Module

```typescript
@Module({
  imports: [],
  controllers: [UsersController],
  providers: [UsersService, UsersRepository],
  exports: [UsersService],
})
export class UsersModule {}
```

## Repository Pattern (Drizzle)

```typescript
interface Repository<T> {
  findAll(filters?: Filters): Promise<T[]>
  findById(id: string): Promise<T | null>
  create(data: CreateDto): Promise<T>
  update(id: string, data: UpdateDto): Promise<T>
  delete(id: string): Promise<void>
}
```

## Skeleton Projects

When implementing new functionality:
1. Search for battle-tested NestJS module patterns
2. Use parallel agents to evaluate options:
   - Security assessment
   - Extensibility analysis
   - Relevance scoring
   - Implementation planning
3. Clone best match as foundation
4. Iterate within proven structure