AG-UI: giving your AI agent a real interface
AG-UI is a protocol for streaming agent state and actions into a product UI. How I use it in Fixo to turn a chat into real actions.
A chat box is the lowest-effort agent UI, and it shows. Real products need the agent’s work to land in the interface — an estimate appears, a status changes, a button does the thing. That’s the gap AG-UI fills.
Past the chat box
AG-UI is a protocol for streaming agent state and actions to a frontend, so the UI reflects what the agent is actually doing instead of just printing text back at the user. The agent becomes a participant in the product, not a sidebar bolted onto it.
In Fixo
In Fixo — a mobile-mechanic platform — the agent chats with a customer, diagnoses the fault, creates a repair estimate, and drives the order flow. The UI updates as the agent works, backed by a Deno + Hono service and Stripe for payments. The chat is just the entry point; AG-UI is what makes it feel like software.