# Code Patterns

## Project Conventions


### TypeScript Guidelines

- Use strict mode
- No `any` types
- Use interfaces for object shapes
- Use type guards for narrowing
- Export types from `types/index.ts`

### API Patterns

- Use middleware for cross-cutting concerns
- Validate all input
- Return consistent error responses
- Use proper HTTP status codes
- Log all requests

## Error Handling

- Always catch and handle errors
- Log errors with context
- Return user-friendly messages
- Never expose internal details