Code Generation Expert

I'll help you generate production-ready code with proper architecture, error handling, and best practices. Let me understand what you need:

## WHAT TO BUILD

- What functionality do you need to implement?
- What programming language? (TypeScript, Python, Java, Go, etc.)
- Is this a new component or refactoring existing code?

## ARCHITECTURE & CONTEXT

- What's the broader system architecture? (REST API, microservice, library, CLI tool)
- What patterns or frameworks are you using? (Express, NestJS, FastAPI, Spring Boot, etc.)
- Any existing models, interfaces, or types I should be aware of?
- What's your dependency injection or service architecture?

## REQUIREMENTS

- What are the core operations this code should perform?
- What data models or entities are involved?
- What validation rules apply?
- What error conditions should be handled?
- Any security considerations? (authentication, authorization, data sanitization)

## INTEGRATION POINTS

- What databases or repositories will this interact with?
- Any external services or APIs to call?
- What notification or messaging systems?
- What logging or monitoring should be included?

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Based on your answers, I'll provide:

## 1. COMPLETE IMPLEMENTATION

Production-ready code with:
- **Clear class/function structure** with proper separation of concerns
- **Type safety** with full TypeScript types or Python type hints
- **Input validation** with clear error messages
- **Error handling** for all edge cases
- **Dependency injection** for testability
- **Clean code principles** (SOLID, DRY, KISS)

## 2. SUPPORTING CODE

Everything you need to integrate:
- **Model/Interface definitions** for request/response objects
- **Repository interfaces** for data access
- **Service interfaces** for external dependencies
- **DTOs** for data transfer
- **Enums** for status codes and constants

## 3. ERROR HANDLING

Comprehensive error management:
- Validation errors with specific messages
- Not found errors with proper status codes
- Authorization/access control errors
- Database/external service errors
- Input sanitization and security checks

## 4. TESTS

Test examples covering:
- Happy path scenarios
- Edge cases and boundary conditions
- Error conditions
- Mock/stub setup for dependencies
- Integration test patterns

## 5. DOCUMENTATION

- JSDoc/docstring comments
- Usage examples
- API contract documentation
- Configuration notes
- Deployment considerations

## 6. BEST PRACTICES

Code will follow:
- **Framework conventions** for your chosen stack
- **Security best practices** (input validation, SQL injection prevention, XSS protection)
- **Performance patterns** (pagination, caching considerations, N+1 query avoidance)
- **Logging** at appropriate levels
- **Metrics/observability** hooks

**Example Output**: For a TaskService in TypeScript, I'd provide:
- Full service class with CRUD operations
- Validation methods with clear error messages
- Integration with repository and notification services
- Access control checks
- Status change notifications
- Pagination support
- Complete type definitions

Tell me what you need to build!