CopilotKit Open Sources Channels SDK: MIT-Licensed Library Brings Any AG-UI Agent into Slack and Microsoft Teams

CopilotKit announced the Channels SDK, an MIT-licensed open-source library that connects any AG-UI-compatible agent (such as those built with LangGraph, CrewAI, Mastra, Pydantic AI, Google ADK, or a plain HTTP agent) to messaging platforms. It supports Slack and Microsoft Teams as early access surfaces, with Discord and Google Chat planned. The SDK is installed via two packages: @copilotkit/channels and @copilotkit/runtime. It uses AG-UI, an agent-user interaction protocol maintained by CopilotKit, and renders messages as JSX that is translated into native platform formats like Block Kit (Slack) and Adaptive Cards (Teams). The runtime manages activation, and the code example shows creating a channel, starting a Node listener, and awaiting readiness with a timeout. The SDK includes features like generative UI, human-in-the-loop approvals (demonstrated by OpenTag intercepting writes), tools, persistence, transcripts, slashes, and mentions. The runtime requires a CopilotKit Intelligence API key for every channel. Deployment requires Node.js 22+, an ESM project, and a long-running process. The article is sponsored by CopilotKit and published on MarkTechPost.