A2UI (UIPlan JSON schema for generative layout composition)

A2UI defines the UIPlan JSON schema to standardize how generative AI models output structured, multi-component layout compositions.

A2UI bridges the gap between LLM reasoning and frontend execution by providing a rigid UIPlan JSON schema for layout orchestration. Instead of generating raw code, models output high-level intent objects that map to specific design tokens, component hierarchies, and responsive constraints. This approach enables dynamic UI generation across frameworks like React and Vue while maintaining strict visual consistency. By decoupling layout logic from rendering logic, A2UI ensures that AI-driven interfaces remain predictable, accessible, and easy for developers to validate through standard JSON schema protocols.

https://github.com/a2ui/uiplan-schema