Give Your AG2 Agent its own UI with AG-UI
You've built an agent with AG2. It reasons, calls tools, and streams responses. But right now it lives in a terminal or a script. The moment you want to put it in front of a user (like for a blog, perhaps) and stream text token by token, show tool activity as it happens, and handle errors gracefully you're building custom plumbing: WebSocket handlers, bespoke JSON formats, state synchronization logic.
AG-UI (Agent-User Interaction Protocol) is an open, lightweight, event-based protocol that standardizes this agent-to-UI layer. AG2 now supports AG-UI natively, meaning you can connect any ConversableAgent to an AG-UI-compatible frontend with just a couple of lines of code.
In this post, we'll look under the hood at how the protocol works by building a working agent chat application from scratch using a ConversableAgent with a weather tool, sending AG-UI events to a browser frontend that renders streaming text and an interactive tool card. Simple HTML, no frontend framework required.
