Safe Action Advanced

Once you're past basic server actions, you'll need this for the patterns that actually show up in production apps. It covers bind arguments for passing resource IDs without exposing them to the client, metadata schemas for passing typed data through middleware chains, and server-side callbacks that run after your actions complete (as opposed to the client-side hooks). The framework errors section handles Next.js redirects and auth boundaries properly. The type inference utilities are there when you need to extract input or result types from your action definitions. This is the stuff that's not obvious from the basic docs but becomes necessary once you're building anything real.