关于
This skill provides a comprehensive toolkit for building robust security layers within backend applications. It offers production-ready implementation patterns for stateless JWT authentication, stateful session management, and third-party social logins via OAuth2. Beyond basic login flows, it includes advanced logic for refresh token rotation, hierarchical Role-Based Access Control (RBAC), and fine-grained permission systems, ensuring developers can secure REST and GraphQL APIs against unauthorized access while maintaining horizontal scalability.