We already have AG-UI [0], which has been implemented by frameworks like Microsoft agent framework, pydantic AI and llamaindex. I guess they'll just have to duplicate functionality.
Sigh.
Sigh.
AG-UI is built to support agentic behavior in your application, more similar to the Vercel AI SDK but horizontal and standardized.
MCP-UI helps external apps and APIs pass UI to applications, really well suited for use cases like Shopify stores inside of ChatGPT.