Saturday, 4th April 2026
AG-UI Protocol: The Missing Standard for AI Agent Interfaces
If you’ve built applications with AI agents, you’ve hit this wall: every framework has its own way of streaming responses to the UI. LangChain uses callbacks and streaming iterators. CrewAI returns completed results. AutoGen has its own message protocol. Amazon Bedrock Agents uses a proprietary streaming format. OpenAI Assistants has yet another event structure.
[... 1,959 words]