@copilotkit/channels-teams

The Microsoft Teams platform adapter for @copilotkit/channels. It's a concrete PlatformAdapter that plugs Teams into the platform-agnostic bot engine, exactly like @copilotkit/channels-slack does for Slack. You write your bot once with createChannel (handlers, JSX, tools, context) and run it on Teams by adding this adapter.

It is built on the Microsoft 365 Agents SDK (@microsoft/agents-hosting), the successor to the Bot Framework SDK.

The adapter keeps its own Teams/Microsoft 365 credentials (clientId / clientSecret / tenantId, or none for anonymous local dev) — but the Channel itself only runs inside a CopilotKit Intelligence-configured CopilotRuntime (an API key; a free tier is available). There is no standalone / DIY runner and no channel.start(); the runtime starts and owns the channel because Intelligence is configured.

Managed Channels: the alternative to holding your own credentials

This adapter is the self-hosted path: your process holds the Microsoft Teams credentials, runs the Microsoft Teams ingress, and talks to Microsoft Teams directly.

Managed Intelligence Channels is the alternative. Intelligence owns the provider edge — signed ingress, egress, and encrypted credential storage — so your process holds no Microsoft Teams credentials and exposes no public Microsoft Teams endpoint. You also get durable threads, the Channels dashboard with per-Channel health and transcripts, and guided provider setup from either the browser wizard or the CLI. For a newly created managed app, the browser creates the durable Channel draft and issues the fully scoped provisioning command:

npx copilotkit@latest channels add --project-id <project-id> --channel-id <channel-id> --adapter teams --provision

That managed path creates a Teams-managed bot and Entra identity; it does not require Azure Bot. The peer manual path uses Teams Developer Portal plus Entra. Both keep provider secrets and one-time app-package bytes out of your project.

Your bot code is otherwise identical — the agent, tools, context, commands, and turn handlers do not change. Only the transport does. See examples/teams/app/managed.ts for the same bot wired both ways, and the copilotkit-channels skill for the runtime wiring.

This self-hosted adapter remains fully supported. Choose it when you want the provider connection inside your own infrastructure.

Install

pnpm add @copilotkit/channels @copilotkit/channels-ui @copilotkit/channels-teams

Quickstart

import { createChannel } from "@copilotkit/channels";
import { teams } from "@copilotkit/channels-teams";
import { CopilotRuntime, CopilotKitIntelligence } from "@copilotkit/runtime/v2";
import { createCopilotNodeListener } from "@copilotkit/runtime/v2/node";

const bot = createChannel({
  name: "support-bot", // project-unique Intelligence Channel name
  identifyUser: "platform",
  adapters: [teams({ port: 3978 })],
});

bot.onMessage(({ thread, message }) => thread.post(`Echo: ${message.text}`));

// The runtime owns the channel's lifecycle — there is no `bot.start()`.
const runtime = new CopilotRuntime({
  intelligence: new CopilotKitIntelligence({
    // apiUrl and wsUrl default to the managed Intelligence platform — override
    // both together only for a self-hosted deployment.
    apiKey: process.env.COPILOTKIT_INTELLIGENCE_API_KEY!, // free tier available
  }),
  channels: [bot],
});

// Creating the listener starts the Channel's connection.
const listener = createCopilotNodeListener({ runtime });
// Optional: await that activation; once settled, POST /api/messages is listening
// on :3978.
await listener.channels.ready();

Then point the Microsoft 365 Agents Playground at it. No Microsoft credentials are required for local development:

npx @microsoft/m365agentsplayground   # opens http://localhost:56150

The Playground connects to http://127.0.0.1:3978/api/messages and gives you a Teams-like chat UI to test against. See examples/teams for a complete, runnable echo bot, and the Microsoft Teams guide for sideloading into real Teams via Azure Bot Service.

How it maps onto the PlatformAdapter contract

• Ingress: a CloudAdapter receives Teams activities at POST /api/messages (stood up by an Express server). Each message activity is normalized into sink.onTurn(...). Uploaded files ride along as attachments: buildFileContentParts downloads them (a file.download.info URL, or a data:/https media URL) and hands the agent multimodal content parts — CSV/JSON/text as decoded text, images and PDFs as binary. That's what makes "upload a CSV → get a chart" work. Note Teams only delivers uploaded files to a bot in 1:1 (personal) chat (requires supportsFiles: true in the app manifest); in a channel or group chat Teams does NOT send the file to the bot at all, so chart-from-data there means pasting the data inline.
• Egress: structured/interactive UI is rendered to an Adaptive Card (1.5) and sent as an attachment; a reply that collapses to plain text is sent as a normal text activity (a bare Echo: hi shouldn't be a card). Both go out on the live TurnContext within the originating turn. The engine awaits the whole turn handler, so a reply (or a full runAgent() loop) completes before the HTTP response closes. (Out-of-turn / proactive sends fall back to CloudAdapter.continueConversation via the captured conversation reference.)
• Files out: postFile posts a file to the conversation. An image (e.g. a rendered chart PNG) is sent as an inline attachment via a data: URI, so it renders directly in the thread — the bot-slack postFile parallel.
• Streaming: text replies stream by message edit (Teams' baseline model). It posts the first content, then updateActivity edits the same message as the buffer grows (throttled and serialised; see TeamsMessageStream), after a typing indicator. Native token streaming is a later enhancement.
• Agent runs: createRunRenderer bridges AG-UI events to Teams. Each text message is streamed by edit, and tool calls plus interrupts are captured for the run loop.
• History: Teams does not hand the bot a queryable transcript, so an in-memory TeamsConversationStore keeps one per conversation and seeds each agent run with it. Swap in a durable ConversationStore for production.

Native Teams JSX

Use the Teams namespace for Adaptive Card types outside the portable JSX set. A native card has one explicit Teams.AdaptiveCard root. Actions can be root children or children of Teams.ActionSet.

import { Teams } from "@copilotkit/channels-teams";

await thread.post(
  <Teams.AdaptiveCard fallbackText="Deploy approval">
    <Teams.TextBlock text="Deploy ready" wrap />
    <Teams.ActionSet>
      <Teams.Action.Submit
        key="approve"
        title="Approve"
        value={{ decision: "approve" }}
        onSubmit={({ action }) => approve(action.value)}
      />
    </Teams.ActionSet>
  </Teams.AdaptiveCard>,
);

The serializer computes the card version from the types and properties in use. An explicit lower root version fails with the component and property that raised the minimum. Named child slots stay traversable, so handlers inside an action set survive managed delivery and action recovery. Teams.Raw accepts a reviewed non-interactive Adaptive Card object.

The generated native catalog labels the 38 stable Teams body types, 7 stable actions, preview entries, and supporting nodes. Host badges and catalog presence come from adaptivecards.microsoft.com. “Supported” here means Microsoft marks the entry for Teams; verification in a live tenant remains a separate release check. Direct Teams and managed Teams use the same serializer and Bot Framework attachment shape.

Options

teams({
  port: 3978, // POST /api/messages port (Playground default)
  clientId, // Microsoft app id; omit for anonymous local dev
  clientSecret, // omit for anonymous local dev
  tenantId, // omit for multi-tenant / anonymous
  interruptEventNames, // custom-event names treated as agent interrupts
});

Credentials also resolve from the clientId / clientSecret / tenantId environment variables (the names the M365 Agents SDK reads).

Status & roadmap

Implemented: message ingress; Adaptive Card rendering of the bot-ui vocabulary (<Header>, <Section>/<Markdown>, <Fields>, <Table>, <Image>, <Actions>/<Button>, <Select>, <Input>, <Context>) with a plain-text path for bare replies and a Markdown table fallback; streamed-by- edit text replies with a typing indicator; runAgent tool-call / interrupt capture; card-action round-trip + HITL (below); conversation history; update / delete. Verified in the M365 Agents Playground.

Card-action round-trip + HITL. Adaptive Card Action.Submit clicks arrive as Message activities carrying the action data in activity.value; decodeInteraction parses our opaque ckActionId + button value and routes them to sink.onInteraction, which resolves the engine's awaitChoice waiter and runs the button's onClick (e.g. to edit the picker in place). A tool handler that calls await thread.awaitChoice(<Card/>) therefore gates the agent on a human decision; see examples/teams for an approve/reject demo. Ingress and interaction decoding derive the conversation key from one shared helper (conversationKeyOf) so the waiter always resolves.

Async turn handoff. When credentialed, ingress acks the inbound turn immediately and runs the agent on a detached continueConversation context, so an awaitChoice suspend can outlive the Teams turn window (approval minutes later). In the anonymous local Playground (where continueConversation has no app id) the run uses the inbound turn context, which localhost holds open across the suspend. Waiters are in-memory (v1), so they don't survive a process restart.

Planned follow-ups (the architecture leaves room for each):

• Native token streaming: token-by-token replies via the SDK's StreamingResponse (queueInformativeUpdate / queueTextChunk / endStream), vs. the current post-then-edit model.
• Durable HITL waiters: persist pending awaitChoice state so approvals survive a restart (today they're in-memory).
• User lookup (Microsoft Graph) and arbitrary non-image file upload via the Teams/Graph file-consent flow (today postFile handles inline images).

Exports

teams, TeamsAdapter, TeamsAdapterOptions, TeamsReplyTarget, ConversationKey; TeamsConversationStore; createRunRenderer; conversationKeyOf / parseCardAction; renderTeamsMarkdown; renderAdaptiveCard / AdaptiveCard / isPlainText / ADAPTIVE_CARD_CONTENT_TYPE; TEAMS_LIMITS; TeamsMessageStream; createTeamsServer / TeamsServer / TeamsServerConfig; SanitizingHttpAgent (deprecated — Channels sanitize by default); buildFileContentParts / TeamsAttachmentRef / FileDeliveryConfig.