Auth Implementation Patterns skill: what it does and how to install it

What it does. Explains authentication and authorisation patterns, including session-based and token-based approaches, OAuth2 and OpenID Connect, and role-based access control. Covers security practices such as password hashing, secure cookies, token expiry, rate limiting and server-side validation, with detailed pattern documentation available for deeper guidance.

When to use it. When implementing or migrating authentication, securing APIs, adding social login or SSO, managing sessions and permissions, or debugging authentication issues.