Does this skill support the latest Next.js versions?

Yes, it is specifically designed for Next.js 15.5 and 16, including support for the new Node.js-based proxy.ts middleware.

How does it handle internationalization?

It includes logic for locale detection via cookies and headers, and automatically handles localized path rewrites and redirects.

Can I use this for Role-Based Access Control (RBAC)?

Absolutely. The skill provides pre-built patterns for checking user roles via JWT tokens and restricting access to specific routes.

Does it help with web security?

Yes, it provides standardized configurations for Content Security Policy (CSP), CORS, and other essential security headers to protect your application.

Next.js Middleware Master

Name: Next.js Middleware Master
Author: JosiahSiegel

byJosiahSiegel

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API Development

Implements advanced Next.js middleware patterns for authentication, routing, and security in Edge and Node.js environments.

This skill provides a comprehensive toolkit for building robust Next.js middleware (v15.5/16), covering both Edge-based middleware.ts and Node.js-based proxy.ts. It automates the creation of complex request handling logic, including role-based access control, dynamic redirects, internationalization (i18n), and geolocation routing. Whether you need to secure routes with JWT tokens, implement A/B testing via rewrites, or set strict security headers like CSP and CORS, this skill ensures your Next.js application follows optimized, production-grade patterns with minimal manual configuration.

Key Features

017 GitHub stars

02Internationalization (i18n) and geolocation-based routing logic

03Dynamic redirects, rewrites, and A/B testing configurations

04Role-based access control (RBAC) and authentication protection

05Edge and Node.js (proxy.ts) middleware implementation patterns

06Comprehensive security header management including CSP and CORS

Use Cases

01Protecting private dashboard routes with JWT-based authentication guards

02Implementing localized routing and locale detection based on user preferences

03Hardening API endpoints with custom security headers and rate-limiting patterns

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add josiahsiegel/claude-plugin-marketplace nextjs-middleware

For use in Claude.ai and ChatGPT

Download Skill