Google releases A2UI 1.0 for generative UI
Google today has released A2UI 1.0, what it is calling the first stable version of its open protocol for generative UI.
Human-agent work today involves either written prompts or texts and speech on the human side, and a huge amount of text is returned by the agent. While this capability has worked, using text to compare products or edit and approve a detailed action plan is less than ideal Google’s A2UI can be used by developers to create interactive screens, forms or charts. The company said developers can use it with open-source renderer SDKs for the web, Android and iOS. Agent SDKs can be used for Python, TypeScript and Dart.
“With A2UI, the agent describes what to show, and every app draws the UI with its own native components,” Google wrote in its blog announcement. “The application receives A2UI messages and each app renders the content securely and at native speed. Users get the same low latency, high trust, and complete native fidelity whether they reach a company’s agent in its own app or in a third-party AI assistant that hosts MCP apps, such as Gemini or Claude.”
Why A2UI
- Personalized in the moment. Your agent constructs a UI that adapts to each user’s unique needs and preferences.
- Native to your brand. Agents use your design system and nothing else. They place and configure only the components you register.
- Fast, reliable, and secure in production. LLMs compose UI with A2UI Express or with “system one” decision models that pick components instead of writing text. A2UI reliably binds to your data and child components on the server, so sensitive values never reach the model, and the app streams in the UI as the agent works.
What developers can build with A2UI
You wake up sick. Getting through the morning takes six apps: book a video visit, move your meetings, tell your team, turn on an out-of-office reply, ask your partner to do school pickup and order soup. Ask a text-only agent instead, and you get a numbered wall of text, then round after round of “which ones?”. A2UI won’t handle your sick day, but it gives developers the framework to build an agent that can. That agent could answer with one view of all six apps. Changing your plan is a couple of taps instead of another round of messages, and nothing is sent until you confirm.
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