Authentication & Authorization Implementation Patterns

Build secure, scalable authentication and authorization systems using industry-standard patterns and modern best practices.

Use this skill when

• Implementing user authentication systems
• Securing REST or GraphQL APIs
• Adding OAuth2/social login or SSO
• Designing session management or RBAC
• Debugging authentication or authorization issues

Do not use this skill when

• You only need UI copy or login page styling
• The task is infrastructure-only without identity concerns
• You cannot change auth policies or credential storage

Instructions

• Define users, tenants, flows, and threat model constraints.
• Choose auth strategy (session, JWT, OIDC) and token lifecycle.
• Design authorization model and policy enforcement points.
• Plan secrets storage, rotation, logging, and audit requirements.
• If detailed examples are required, open resources/implementation-playbook.md.

Safety

• Never log secrets, tokens, or credentials.
• Enforce least privilege and secure storage for keys.

Resources

• resources/implementation-playbook.md for detailed patterns and examples.

🧠 Knowledge Modules (Fractal Skills)

1. implementation-playbook