A2UI Development Skill

This skill helps you generate A2UI (Agent to UI) protocol compliant code for building rich, interactive user interfaces that AI agents can stream to clients.

Protocol Version

This skill targets A2UI Protocol v0.8 (Stable Release).

Standard Catalog ID: https://github.com/google/A2UI/blob/main/specification/0.8/json/standard_catalog_definition.json

Core Concepts

1. Message Types

A2UI uses four message types in a JSONL stream: