Laravel Middleware Pattern Skill

Use this skill when implementing request filtering or modification logic.

Rules

1. Modern Registration (Laravel 12)

• Do NOT look for app/Http/Kernel.php (it is gone).
• Register middleware in bootstrap/app.php using the ->withMiddleware() callback.
• Use append() for global or alias() for route-specific.

->withMiddleware(function (Middleware $middleware) {
    $middleware->append(EnsureTokenIsValid::class);
    $middleware->alias([
        'admin' => EnsureUserIsAdmin::class,
    ]);
})

2. Structure

• Implement the handle method with proper typing.

public function handle(Request $request, Closure $next): Response
{
    if (...) {
        return redirect('/home');
    }
    return $next($request);
}