TanStack Start Routing

Inspect the route contract

Read ../../docs/routing-and-data.md. Inspect the source route files, generated route tree, router context, and the exact URL being changed. Confirm whether the task affects direct requests, client navigation, or both.

Implement typed URL state

• Express hierarchy with the existing file-route conventions.
• Validate path and search inputs at the route boundary.
• Declare every loader input in loader dependencies.
• Keep secrets and direct database access out of isomorphic loaders.
• Use server functions for protected server work.
• Use typed links, navigation, redirects, and route APIs.
• Provide deliberate pending, error, and not-found behavior.

Treat beforeLoad as navigation and context control. Enforce protected-data access again in the server function or server route.

Control performance