Can I use this for custom user roles and permissions?

Absolutely. The skill includes detailed documentation on using Clerk JWT templates to map user public_metadata to custom session claims for RBAC.

How does this skill handle Cloudflare Workers?

It provides a complete pattern for token verification using @clerk/backend, including specific instructions for setting authorizedParties to prevent CSRF attacks.

Is it compatible with frontend libraries like shadcn/ui?

Yes, the skill includes integration patterns for shadcn/ui, ensuring that your auth components match your application's design system.

Does this skill support the latest Next.js 15 patterns?

Yes, it includes the latest async auth() patterns and middleware configurations required for Next.js 15 and @clerk/nextjs v6.

How does it help with troubleshooting Clerk errors?

It provides specific fixes for common issues like 'Missing Secret Key' errors, JWT size limitations (1.2KB), and JWKS cache synchronization.

Clerk Authentication

Name: Clerk Authentication
Author: secondsky

bysecondsky

•

Security & Testing

Implements secure user authentication and session management using Clerk for React, Next.js, and Cloudflare Workers.

This skill provides a production-ready framework for integrating Clerk Auth into modern web applications, offering standardized patterns for React, Next.js, and Cloudflare Workers. It streamlines the implementation of protected routes, asynchronous middleware, and JWT verification while providing specific guidance on advanced features like custom session claims and JWT templates. Designed to handle common pitfalls such as CSRF vulnerabilities and secret key errors, this skill ensures your authentication layer is secure, scalable, and compatible with the latest framework versions like Next.js 15.

Key Features

01Advanced JWT template customization for role-based access control (RBAC)

02Robust middleware configuration for automated route protection and public route management

03Seamless React integration with ClerkProvider and custom authentication hooks

04Full support for Next.js 15 and App Router with async auth() helpers

05Edge-compatible authentication patterns for Cloudflare Workers and Hono

0621 GitHub stars

Use Cases

01Adding secure user management and login flows to a Next.js SaaS platform

02Protecting serverless API endpoints on Cloudflare Workers with JWT verification

03Implementing custom metadata and session claims for complex authorization requirements

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add secondsky/claude-skills clerk-auth

For use in Claude.ai and ChatGPT

Download Skill