A2UI lab
A support agent (LangChain) asks a customer to confirm a refund by sending A2UI v0.9 messages: components and the data they bind to, never code. The support chat checks each message with @a2ui/web_core 0.12.0, the official A2UI library, draws the card in the App tab from its own seven components, and sends the press back as an action the agent checks against what it sent. It all runs in this page over a plain HTTP stream; the refund is simulated. Turn on Intercept to hold messages on the wire and tamper with them.