AG-UI as the Agent–UI Contract Layer
AG-UI is a typed event contract between an agent backend and a frontend, turning streamed agent state into UI. This diagram maps the layers and shows where human review plugs in.
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AG-UI is a typed event contract between an agent backend and a frontend, turning streamed agent state into UI. This diagram maps the layers and shows where human review plugs in.
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Static interfaces cannot adapt when generative AI produces variable outputs, such as a medical scan showing one fracture versus twenty ambiguous regions requiring expert review. The solution combines three AWS technologies: the AG-UI protocol for standardized agent-to-UI streaming via Server-Sent Events, the Strands Agents SDK Swarm pattern for peer-to-peer agent collaboration, and Amazon Nova Act for browser-based legacy system integration. AG-UI removes custom WebSocket formats by defining typed events that both agent frameworks and frontends implement as a universal contract. Strands swarm agents debate hypotheses and iteratively refine findings, producing explainable results visible in real time, while Nova Act navigates login screens and fills forms on systems without APIs. A complete radiology assistant walkthrough demonstrates reduced interface development time and HIPAA-compliant data handling for medical imaging.
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