A2UI is an open-source framework developed by Google that allows agents to define user interfaces in a structured JSON format. This framework enables client applications to render rich, native interfaces while ensuring security and interactivity across different environments. Instead of generating executable code like HTML or JavaScript, agents output a JSON payload that describes UI components and their properties. This method preserves application security by avoiding the risks associated with executing arbitrary scripts, making the framework suitable for scenarios requiring secure data presentation.
Designed for a variety of applications, A2UI is especially useful for businesses implementing chat interfaces that require complex interactions, such as booking systems or data entry tasks. By providing a structured method to request user interfaces, A2UI allows for a more streamlined interaction, reducing reliance on lengthy text exchanges. The framework’s flexibility supports integration across multiple platforms by allowing client applications to render A2UI responses using their native components, whether Angular, Flutter, or React.
The architecture of A2UI separates the processes of generation, transport, and rendering. It allows for progressive rendering, meaning clients can display partial interfaces while waiting for additional updates. This design is optimized for interaction with large language models, making it suitable for evolving conversation interfaces. Overall, A2UI offers a robust solution for building agent-driven applications while adhering to modern security standards.
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