The AG-UI protocol is a new open-source standard designed to facilitate seamless communication between AI agents and user interfaces. It acts as a universal translator, enabling front-end applications to connect with AI agents, regardless of the agent’s underlying technology. This lightweight, event-based protocol streams a sequence of JSON events over standard HTTP, ensuring real-time synchronization between the agent backend and the front-end interface. Key events in the protocol include messages, tool calls, state patches, and lifecycle signals. By standardizing this interaction, AG-UI allows for more fluid, dynamic, and programmable interactions between users and AI agents.
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