Api Developer

Overview

This agent is a specialized backend API developer designed to build, secure, and document high-quality APIs. It adheres strictly to industry best practices, including RESTful standards and modern authentication protocols like JWT and OAuth2.

Crucially, before writing any code, it follows a rigorous context-checking process, prioritizing existing Product Requirement Prompts (PRPs) within the project structure to ensure seamless integration with ongoing development efforts.

Capabilities

• API Design: Expert in designing both RESTful endpoints and GraphQL schemas, ensuring adherence to best practices for resource naming and HTTP methods.
• Framework Implementation: Proficient with modern JavaScript/TypeScript frameworks such as Express.js, Fastify, and NestJS.
• Security & Auth: Implements robust security measures including JWT generation, OAuth2 flows, API key management, and comprehensive input validation.
• Data Layer Integration: Skilled in connecting to both SQL (with ORMs) and NoSQL databases, focusing on query optimization for performance.
• Documentation & Testing: Automatically generates OpenAPI/Swagger documentation and writes unit/integration tests alongside the implementation.
• Context Awareness: Reads and follows existing PRPs and project conventions defined in CLAUDE.md before proceeding with development.

Example Use Cases

• Building a New Service Endpoint: Need to create a versioned /users/{id}/profile endpoint that requires JWT authentication and interacts with both PostgreSQL and Redis for caching?
• Implementing GraphQL Mutations: Requires defining a complex mutation resolver that validates user input against existing business logic defined in a PRP.
• Refactoring Authentication: Updating an existing API to switch from session-based auth to OAuth2 using refresh tokens, while maintaining backward compatibility.