Allow LemonSlice avatars to join third party meeting platforms

[aweitz]

Description

• Adds third-party meeting support (Zoom, Google Meet, Teams, Webex) to the LemonSlice avatar plugin. avatar.join_meeting() sends the avatar into a meeting via the LemonSlice API; the plugin then connects to a LemonSlice-managed relay WebSocket that streams mixed meeting audio into MeetingAudioInput for STT (bypassing LiveKit room audio). Avatar speech is published back into the meeting through the existing LiveKit avatar path. Optionally, meeting chat messages can be relayed into the agent session as user input (listen_to_meeting_chat).

• Relevant LemonSlice endpoints are documented here and here

• Adds new script in examples to demonstrate usage (lemonslice_realtime_avatar_meeting.js)

• agents-js equivalent of Allow LemonSlice avatars to join third party meeting platforms agents#6233

https://www.loom.com/share/92b124d78cc840f08c4acea75845edf6

Changes Made

• In addition to the core addition of joinMeeting and leaveMeeting, this PR tightens types in startAgent to clear the no-explicit-any lint warning.

Pre-Review Checklist

• Build passes: All builds (lint, typecheck, tests) pass locally
• AI-generated code reviewed: Removed unnecessary comments and ensured code quality
• Changes explained: All changes are properly documented and justified above
• Scope appropriate: All changes relate to the PR title, or explanations provided for why they're included
• Video demo: A small video demo showing changes works as expected and did not break any existing functionality using Agent Playground (if applicable)

Testing

• Automated tests added/updated (if applicable)
• All tests pass
• Make sure both restaurant_agent.ts and realtime_agent.ts work properly (for major changes)

Additional Notes

---

Note to reviewers: Please ensure the pre-review checklist is completed before starting your review.

[changeset-bot]

🦋 Changeset detected

Latest commit: 82a9195

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 36 packages

Name	Type
@livekit/agents	Patch
@livekit/agents-plugin-lemonslice	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-anthropic	Patch
@livekit/agents-plugin-assemblyai	Patch
@livekit/agents-plugin-baseten	Patch
@livekit/agents-plugin-bey	Patch
@livekit/agents-plugin-cartesia	Patch
@livekit/agents-plugin-cerebras	Patch
@livekit/agents-plugin-deepgram	Patch
@livekit/agents-plugin-did	Patch
@livekit/agents-plugin-elevenlabs	Patch
@livekit/agents-plugin-fishaudio	Patch
@livekit/agents-plugin-google	Patch
@livekit/agents-plugin-hedra	Patch
@livekit/agents-plugin-hume	Patch
@livekit/agents-plugin-inworld	Patch
@livekit/agents-plugin-liveavatar	Patch
@livekit/agents-plugin-livekit	Patch
@livekit/agents-plugin-minimax	Patch
@livekit/agents-plugin-mistral	Patch
@livekit/agents-plugin-mistralai	Patch
@livekit/agents-plugin-neuphonic	Patch
@livekit/agents-plugin-openai	Patch
@livekit/agents-plugin-perplexity	Patch
@livekit/agents-plugin-phonic	Patch
@livekit/agents-plugin-resemble	Patch
@livekit/agents-plugin-rime	Patch
@livekit/agents-plugin-runway	Patch
@livekit/agents-plugin-sarvam	Patch
@livekit/agents-plugin-silero	Patch
@livekit/agents-plugin-soniox	Patch
@livekit/agents-plugin-tavus	Patch
@livekit/agents-plugins-test	Patch
@livekit/agents-plugin-trugen	Patch
@livekit/agents-plugin-xai	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 1 additional finding.

[toubatbrian]

I reproduced and validated three lifecycle blockers that need addressing before this can be verified:

1. meeting/audio.ts: closing a CONNECTING ws after removing all listeners emits an unhandled error and can terminate Node. Preserve/install a no-op error listener until close, following the existing Cartesia/FishAudio pattern.
2. Make reconnect backoff abort-aware and clean up both its timer and abort listener so leave cannot wait up to 30 seconds.
3. In leaveMeeting(), detach/stop local audio and chat relays before awaiting the retrying remote leave API; remote cleanup must not keep local meeting activity alive.

Please also add patch changesets for the public core AudioInput export and LemonSlice meeting feature, plus deterministic tests covering CONNECTING abort, reconnect timer/listener cleanup, rejected remote leave with cleared/idempotent local state, and active chat relay closure.

[aweitz]

@toubatbrian thanks for the review! please see changes.