RSC as a serializer, not a model

The most interesting thing about how TanStack Start integrates React Server Components is not what it does with them. It is the shape of the API. You do not write a Server Component. You do not opt into a model. You opt into a function — a programmatic primitive that takes a component, runs it through the RSC renderer, and hands you back a payload you can store, transport, and rehydrate later. RSC is not the substrate of the application. It is a tool you reach for at specific call sites, when yo