CopilotKit Open Sources Slack & Teams Agent SDK

CopilotKit released the Channels SDK this week, an MIT licensed library that lets an existing AI agent run inside Slack and Microsoft Teams without a separate rewrite for each platform. Installation takes two npm packages: @copilotkit/channels and @copilotkit/runtime. The connection point is AG-UI, the agent-user interaction protocol CopilotKit already maintains, which means agents built on LangGraph, CrewAI, Mastra, Pydantic AI, Google ADK, or a custom HTTP endpoint can plug in directly. Discord and Google Chat support is planned but not yet shipped.

The design leans on a specific distinction: a channel isn't a second agent bolted onto the first. It's a transport layer and a rendering target. A developer writes the message logic once, and the adapter converts it into whatever format the platform expects, Block Kit for Slack, Adaptive Cards for Teams, instead of dumping raw text through a generic webhook. That framing matters because it keeps the model and orchestration logic exactly where a team already built it, rather than forcing a migration just to get an agent talking to end users inside their existing chat tools.