# Application Guidelines

## Architecture
- This is a monorepo managed with Turborepo
- Apps: web (Next.js), api (Express), mobile (React Native)
- Shared packages: ui, config, types

## Code Standards
- TypeScript strict mode in all packages
- Use barrel exports (index.ts) for public APIs
- No default exports; use named exports everywhere
- Prefer async/await over raw Promises

## API Design
- RESTful endpoints follow /api/v1/{resource} pattern
- All responses use { data, error, meta } envelope
- Validate request bodies with Zod schemas
- Return 4xx for client errors, 5xx for server errors

## Database
- Use Prisma ORM for all database operations
- Migrations checked into source control
- Soft-delete pattern: use deletedAt timestamp, never hard delete
- All timestamps stored as UTC

## Testing
- Jest for unit tests, Playwright for E2E
- Test files colocated: foo.ts -> foo.test.ts
- Mock external services, never call real APIs in tests

# Project Rules

## Stack
- Go 1.23 with Chi router
- PostgreSQL 16 with pgx driver
- Redis for caching and rate limiting

## Commands
- make dev — Start with hot reload (air)
- make test — Run go test ./...
- make lint — Run golangci-lint
- make migrate — Run goose migrations

## Conventions
- Use context.Context as first param in all functions
- Structured logging with slog
- Errors wrap with fmt.Errorf("funcName: %w", err)
- Table-driven tests with t.Run subtests