AG-UI 1.0: stable spec connects any agent to any app
CopilotKit released the stable AG-UI 1.0 spec, adding subagents, multimodality, interrupts and token usage, with TypeScript, Python and .NET SDKs generated from one schema.

Introducing AG-UI 1.0 🪁 The open protocol that connects ANY agent to ANY app, now with a stable spec. AG-UI gives you an entire ecosystem for free. Adopted and supported by Google, Microsoft, Amazon, Oracle, Anthropic, LangChain, Mastra, and more. New in 1.0: → Subagents: expose delegated agent work → Metadata: send data from agent to UI → Multimodality (images, audio, video, docs) → Interrupts → Token usage per run Every SDK is now generated from one schema, so TypeScript, Python and .NET all behave the same. AG-UI 1.0 is fully backwards compatible. Full announcement: https://go.copilotkit.ai/AG-UI-v1.0