Introducing A2UI: An open project for agent-driven interfaces- Google Developers Blog

Introduces A2UI, an open-source project and protocol for agents to generate and transmit UI specifications. A2UI defines a format optimized for updateable, agent-generated UIs and provides initial renderers for frameworks like Lit, Angular, and Flutter. It addresses the challenge of rendering UI across trust boundaries in multi-agent systems by separating UI structure from implementation, allowing clients to retain control over styling and security. A2UI is designed to be LLM-friendly, incrementally updateable, and framework-agnostic, enabling secure, data-like UI transmission rather than executable code.