TanStack Start Workflow

Establish the baseline

1. Read repository instructions and the target application's manifest, lockfile, build config, router setup, and relevant routes.
2. Record exact Start, Router, React, Vite or Rsbuild versions.
3. Identify the request path from browser entry through route, loader, server function or route, middleware, and external dependency.
4. Reproduce the current behavior before changing code when a runtime is available.
5. State assumptions, constraints, and a measurable success condition.

Read ../../docs/architecture.md for the framework model and ../../docs/migration-and-decisions.md for migration work.

Plan the smallest coherent change

Draw the affected data flow. Separate navigation concerns, data-security boundaries, domain logic, rendering, and deployment. Preserve existing build and runtime choices unless the requested outcome requires a change.

Ask before installing packages, modifying a lockfile, creating migrations, deleting files, deploying, committing, or pushing.

Implement