fix(voice): reject unsupported video input

[rosetta-livekit-bot]

Summary

• Port follow-up for fix(voice): resolve video task leak in AgentSession agents#6318 in agents-js.
• JS does not currently have the Python video forwarding task pipeline (VideoInput, _forward_video_atask, or AgentActivity.push_video).
• Reject RoomIO configurations with videoEnabled: true instead of silently accepting unsupported video input that cannot be forwarded or cleaned up.
• Add a patch changeset for @livekit/agents.

Validation

• pnpm format:check
• pnpm build:agents
• pnpm test -- agents/src/voice/room_io/room_io.test.ts
• pnpm build
• cue-cli text-mode runtime validation with a temporary dispatchable JS agent: asserted conversation_item_added(.item.message.role="ASSISTANT") from framework events.

Notes

• No tests were added, matching the original Python fix.

---

Ported from livekit/agents#6318

Original PR description

I was just checking this project and saw this, did some test and felt it might be a real bug, so i fixed it and created this PR!

Description

This change resolves a resource leak where the video forwarding task (_forward_video_atask) was left dangling in the background on session teardown.

The Problem

During session teardown (AgentSession._aclose_impl), the cleanup sequence explicitly cancels and awaits the audio forwarding task (_forward_audio_atask), but completely omitted _forward_video_atask.

This omission leads to leaks under two scenarios:

1. Early Abort (No Activity): If a session starts and is aborted before an activity is initialized (so self._activity is None), the block detaching the inputs is skipped. The active video task is never cancelled and continues running indefinitely.
2. Clean Teardown: Even when an activity is present, setting self.input.video = None cancels the active task but immediately schedules a new redundant task. Explicitly awaiting the task ensures the event loop is cleanly purged of any scheduled forwarding tasks.

The Fix

Added symmetric cancellation and cleanup in AgentSession._aclose_impl matching the audio task's handling:

if self._forward_video_atask is not None:
    await utils.aio.cancel_and_wait(self._forward_video_atask)
</details>

[changeset-bot]

🦋 Changeset detected

Latest commit: 6ea73bb

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

This PR includes changesets to release 35 packages

Name	Type
@livekit/agents	Patch
@livekit/agents-plugin-anam	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-lemonslice	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

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[devin-ai-integration]

✅ Devin Review: No Issues Found

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