CLAUDE.md Metadata System for Enhanced Code Agent Performance

Project: E-commerce API, Architecture: Microservices, Tech Stack: Node.js/Express/PostgreSQL, Coding Standards: TypeScript strict mode with functional patterns, Constraints: Sub-100ms response times, Priorities: Security and scalability. Please help me implement user authentication.

**Project Context Summary**: Confirmed analysis of e-commerce microservices project using Node.js/Express/PostgreSQL stack with strict TypeScript and functional programming patterns. Sub-100ms response requirement noted with security/scalability priorities. **Approach**: Implementing JWT-based authentication service as dedicated microservice, utilizing functional composition patterns per project standards, with PostgreSQL session store for scalability. **Implementation**: ```typescript // auth-service/src/auth.controller.ts const authenticateUser = pipe( validateCredentials, hashPassword, queryUserDatabase, generateJWT ); export const authController = { login: async (req: Request, res: Response) => { const result = await authenticateUser(req.body); return res.status(200).json(result); } }; ``` **Compliance Notes**: Solution uses functional composition per coding standards, implements microservice pattern matching architecture, includes performance optimizations for sub-100ms target. **Next Steps**: Configure rate limiting middleware, implement refresh token rotation, set up monitoring for response time compliance.