clerk-auth_skill

Overview

This skill provides expert implementation patterns for Clerk authentication in Python projects, covering middleware, organizations, webhooks, SSO, and user synchronization. It focuses on practical, secure patterns and points you to the exact reference files you must consult for creation, diagnosis, and validation. Use it to implement reliable sign-in/sign-up flows, multi-tenant organizations, and safe webhook handling.

How this skill works

When creating auth components, always follow the canonical patterns in references/patterns.md to build middleware, routes, and sync logic. For diagnosing failures or edge cases, consult references/sharp_edges.md to identify root causes and risks such as token replay, race conditions, or incorrect session handling. For any review or validation step, use references/validations.md to check constraints, required fields, and invariant rules before deployment.

When to use it

• Adding Clerk to a new or existing Python web app (sign in / sign up flows)
• Implementing organization or multi-tenant access control with Clerk
• Building middleware to protect routes and enforce session or role checks
• Syncing users between Clerk and an internal database or background jobs
• Handling Clerk webhooks securely and reconciling user state

Best practices

• Always follow references/patterns.md for implementation patterns; avoid ad-hoc solutions.
• Validate incoming webhook payloads and signatures per references/validations.md before acting.
• Use middleware to centralize session and role checks; keep handlers idempotent to avoid race conditions.
• Design user-sync jobs with backoff and deduplication; record source-of-truth timestamps to resolve conflicts.
• Test edge cases from references/sharp_edges.md (expired tokens, concurrent updates, deleted orgs) and document mitigations.

Example use cases

• Protect API endpoints with Clerk session middleware that verifies tokens and sets user context.
• Implement organization membership checks before granting access to tenant resources.
• Build a webhook consumer that validates the signature, queues a user-sync job, and updates internal profiles safely.
• Create an SSO integration flow that exchanges provider assertions for Clerk sessions and enforces MFA policies.
• Run nightly reconciliation that compares Clerk users to internal records and resolves mismatches using validation rules.