middleware.ts

import { clerkMiddleware, createRouteMatcher } from '@clerk/nextjs/server';

// Everything except these requires a signed-in user. API routes run their own
// auth() checks and return 401 (rather than redirect), so they're not protected
// here.
const isPublicRoute = createRouteMatcher([
  '/',
  '/login(.*)',
  '/signup(.*)',
  '/api/(.*)',
]);

export default clerkMiddleware(async (auth, request) => {
  if (!isPublicRoute(request)) {
    await auth.protect();
  }
});

export const config = {
  matcher: [
    // Skip Next.js internals and static files, unless found in search params
    '/((?!_next|[^?]*\\.(?:html?|css|js(?!on)|jpe?g|webp|png|gif|svg|ttf|woff2?|ico|csv|docx?|xlsx?|zip|webmanifest)).*)',
    // Always run for API routes
    '/(api|trpc)(.*)',
  ],
};