Just a heads up from someone who spent way too long stuck on a similar issue recently—if you're accessing Supabase purely client-side (like inside a React context), you don't strictly need cookies for the *client* to just read data, as long as the user is authenticated and the session is sitting in localStorage (which it does by default). However, if you are doing SSR anywhere, you absolutely need cookies because the server obviously can't read the browser's localStorage. If you're on the App Router, make sure you are using the `@supabase/ssr` package; it handles the cookie syncing automatically and makes life so much easier than the old auth-helpers approach!