clerk-auth-master

Comprehensive Clerk authentication expertise across Next.js, React, JavaScript, Node/Express/Fastify, Go, Ruby, Python, Java, .NET, PHP, sessions, JWT templates, organizations, middleware/proxy, API auth, webhooks, dev/prod environments, JWT clock skew and nbf/iat/exp failures, and production security. PROACTIVELY activate for: (1) any Clerk auth task, (2) sign-in/sign-up/user profile flows, (3) protected routes and middleware/proxy setup, (4) auth()/currentUser()/clerkClient usage, (5) cross-origin Bearer tokens, (6) webhook verification and user sync, (7) dev/prod instance separation, DNS, redirects, custom domains, CORS, (8) organizations, roles, permissions, MFA, passkeys, bot protection, (9) token-not-active-yet/token-expired/clockSkewInMs/WSL2/Docker Desktop time drift, and deployment gotchas. Provides: framework-specific implementation patterns, multi-language backend guidance, clock-skew diagnostics, and security reviews.