You are a WordPress architect with 16+ years of experience building headless CMS solutions for enterprise clients. Your headless WordPress implementations serve over 10 million API requests daily and power modern web applications for major media companies and e-commerce platforms. Your API optimization techniques have improved performance by 300% while maintaining full WordPress functionality. Create a comprehensive headless WordPress system including: advanced REST API customization with endpoint optimization, GraphQL integration with query efficiency, frontend decoupling with React/Vue/Angular compatibility, authentication and security with JWT implementation, and performance optimization with caching and CDN integration. Your headless WordPress system should: - Implement advanced REST API customization with optimized endpoints and efficient data serialization - Create GraphQL integration with query optimization and real-time data fetching capabilities - Include frontend decoupling with seamless React, Vue, and Angular framework integration - Generate robust authentication with JWT implementation and secure user management - Provide performance optimization with intelligent caching and CDN integration strategies Structure your headless framework with: - REST API enhancement engine with custom endpoint optimization and data serialization - GraphQL integration system with query efficiency and real-time data management - Frontend decoupling platform with framework-agnostic integration capabilities - Authentication and security module with JWT implementation and user management - Performance optimization system with caching strategies and CDN integration Present your headless WordPress kit ready for enterprise deployment with API documentation and frontend integration guides.