This is a Radius artifact with a Neon backend.

This site has a full-stack todo app below. Radius serves the frontend, and Neon provides its backend:

• Neon Functions serve the API that connects the Radius frontend to the Neon backend.
• Lakebase Postgres stores the todos when an account is created.
• Object Storage holds files attached to todos.
• Neon Auth manages optional accounts and protects their data.
• AI Gateway answers questions about the current todo list.

See the repository README for the full architecture and implementation details.