Google has open-sourced A2UI โ a UI language for AI agents
It allows agents generate user interfaces instead of only text.
โ Agents send a JSON description of UI components, and the client app renders them with its own trusted widgets.
The benefits:
- declarative UI format (JSON, not code)
- safe: only approved components can be rendered
- framework-agnostic (web, Flutter, etc.)
- supports incremental UI updates
So agents can "speak UI," while the application keeps control over security and implementation

GitHub
GitHub - google/A2UI
Contribute to google/A2UI development by creating an account on GitHub.
