Slack huddles plugin

The slack-huddles plugin joins active Slack huddles through the Slack web client in the OpenClaw Chrome profile. It uses a dedicated Slack user account for the agent: Slack has no app or bot API for joining huddles or reading their audio. The plugin is separate from the Slack messaging channel.

Use Meeting plugins for shared modes, Chrome and virtual-audio setup, transcripts, remote-node requirements, and verification.

Requirements

• OpenClaw 2026.9.8 or newer. Older hosts lack the shared meeting-runtime ownership checks this plugin depends on, so install refuses them.
• A dedicated Slack user account signed into Slack in the OpenClaw Chrome profile.
• Membership in the channel or conversation containing the huddle.
• An active huddle, started by a person in Slack.
• Slack's English UI. The adapter prefers data-qa hooks, but its text and accessible-label fallbacks are English-only.
• For talk-back (agent or bidi), BlackHole 2ch and SoX on macOS, or PipeWire-Pulse and its command-line tools on Linux, on the host that runs Chrome.

For caption transcripts, turn on Slack's preference to turn on captions by default when joining huddles for the dedicated account. The plugin reads visible captions; it does not open Slack menus to enable them. When captions are unavailable, status reports captioning: false with a note. Caption availability also limits the shared durable transcript and notes path.

Install and enable

Install the plugin if needed, then enable it explicitly:

openclaw plugins install @openclaw/slack-huddlesopenclaw plugins enable slack-huddles

It is disabled by default because it needs a signed-in dedicated Slack user. Check that the configuration change applies, then verify prerequisites:

openclaw slackhuddles setup

Sign in using the same Chrome profile that OpenClaw controls. A Slack app's bot token or user OAuth token does not replace that browser sign-in.

Talk-back verifies Slack's selected microphone label: BlackHole 2ch on macOS or the OpenClaw Meeting Audio source on Linux. When needed, the adapter opens Slack's audio settings and selects that microphone before enabling in-call talk-back. If the picker is unavailable, select it manually and retry status. Verify remote audibility with a controlled second participant.

Configure

The plugin uses the shared meeting configuration. This example uses the normal agent path and Chrome on a paired node:

{  plugins: {    entries: {      "slack-huddles": {        enabled: true,        config: {          defaultMode: "agent",          chrome: {            browserProfile: "openclaw",            autoJoin: true,            audioBackend: "auto",          },          chromeNode: { node: "meeting-node" },        },      },    },  },}

Omit chromeNode to run Chrome on the Gateway host. A paired node must allow browser.proxy and slackhuddles.chrome; select it with plugins.entries.slack-huddles.config.chromeNode.node.

Use agent for OpenClaw reasoning and tools with TTS replies, bidi for direct realtime voice, or transcribe for observe-only captions. Talk-back captures remote participant audio in the page and sends assistant speech through the virtual microphone. Configure providers using the shared meeting settings. The Slack account owns the display name; a guest name is not entered.

Join and manage a huddle

In Slack, use Copy huddle link, then pass the link to OpenClaw:

openclaw slackhuddles join 'https://app.slack.com/huddle/T0123ABCD/C0123ABCD'openclaw slackhuddles statusopenclaw slackhuddles leave <session-id>

A channel reference also works. Without a workspace id, the signed-in Slack client resolves its active workspace:

openclaw slackhuddles join 'channel:C0123ABCD' --mode transcribe

Accepted inputs are HTTPS Slack huddle links with or without the team id, and channel ids beginning with C, G, or D, followed by at least eight uppercase letters or digits. Channel references can be prefixed with channel: or slack:channel:. To select a workspace explicitly, use team:T0123ABCD:channel:C0123ABCD or slack:team:T0123ABCD:channel:C0123ABCD; both produce https://app.slack.com/huddle/T0123ABCD/C0123ABCD. Team ids begin with T or E and follow the same uppercase and length rules.

Message permalinks, user ids, slack:// deep links, and Slack /client/... browser URLs are not accepted join inputs. Use Copy huddle link or a channel reference. Channel ids are only unique within a workspace, so a team-qualified link keeps its workspace: it reuses a session only for the same workspace and channel, and never matches a bare channel reference.

The slack_huddles tool supports join, leave, status, transcript, and speak. Its join url can be a huddle link or channel reference. In a Slack conversation, the Conversation info chat_id carries the channel id. Gateway methods use slackhuddles.*; the node command is slackhuddles.chrome. The transcript source provider is slack-huddle, with alias slack-huddles; stored transcripts use the provider name Slack huddle.

Handle manual actions

With chrome.autoJoin: true, the adapter clicks Join Huddle for an active huddle, and only while the account is not already in another huddle. It always joins muted, because the Join transition itself can switch Slack's input. For talk-back, it selects the virtual microphone in the call and unmutes only once Slack reports it as the input, so the host's physical microphone never goes live; transcribe stays muted. The camera stays off.

Leave uses Slack's Leave Huddle control. It never ends the huddle for everyone.

Limits

The plugin joins active huddles only. It does not start huddles, answer incoming rings, automatically join occupied channels, or use screen sharing, canvas, AI notes, or emoji controls. Use one huddle per dedicated Slack account; another device using that account can cause a session conflict.

Slack keeps a huddle running while its client shows other channels, so the adapter proves membership only from the huddle channel's own header. Keep the OpenClaw Slack tab on that channel: on any other view, status reports the call as unverified, and audio, captions, and Leave stay blocked.

Slack does not sanction automated user clients. Web-client DOM changes can break the adapter even when Slack's messaging APIs remain unchanged. This integration does not create audio or video recordings.

Related

• Meeting plugins
• Slack channel
• Transcripts CLI