Access Control Rbac

This is a solid foundation for implementing role based access control in your app. You get working examples in Node.js, Python, and Java Spring Security, covering both traditional RBAC and attribute based access control. The code shows permission classes, role hierarchies, and policy evaluation logic you can adapt. Honestly, the examples are educational but you'll need to extend them significantly for production use, especially around persistence, caching, and integration with your auth system. Best suited for teams building their first serious authorization layer or migrating from ad hoc permission checks to something structured. The best practices section is actually useful, emphasizing least privilege and avoiding role explosion.