fix(deepgram): prevent TypeError in STTv2 #sendTask on stream teardown

[mykmelez]

Description

I've been experiencing this error when tearing down a Deepgram STTv2 stream:

TypeError: Cannot read properties of undefined (reading 'data')
at #sendTask (file:///app/node_modules/.pnpm/@livekit+agents-plugin-deepgram@1.0.48_@livekit+agents@1.0.48_patch_hash=16f67c4454ddfc_5806c0752ada5e043f9df09228747190/node_modules/@livekit/agents-plugin-deepgram/dist/stt_v2.js:194:50)
at async Promise.all (index 0)
at async SpeechStreamv2.run (file:///app/node_modules/.pnpm/@livekit+agents-plugin-deepgram@1.0.48_@livekit+agents@1.0.48_patch_hash=16f67c4454ddfc_5806c0752ada5e043f9df09228747190/node_modules/@livekit/agents-plugin-deepgram/dist/stt_v2.js:148:24)
at async SpeechStreamv2.mainTask (file:///app/node_modules/.pnpm/@livekit+agents@1.0.48_patch_hash=16f67c4454ddfcf1a293acc3d23e6f58afb9c1038ef83d38702c1_0a10b516bd5ee098b72ec3483ed7545b/node_modules/@livekit/agents/dist/stt/stt.js:74:16)

It looks like the issue is that the sendTask loop checks for !('value' in result) to detect when the iterator is finished.

But iterator.next() returns { done: true, value: undefined } in that case, so that check evaluates to false, and execution falls through to the else if ('value' in result) branch, which tries to read result.value.data.buffer on the undefined result.value.

This fixes the issue by checking result.value === undefined instead.

Changes Made

• replaced !('value' in result) with result.value === undefined

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)

I also tested by patching @livekit/agents-plugin-deepgram in my application with this change and then confirming that the plugin continues to work correctly and no longer reports the error.

Additional Notes

None.

---

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

[changeset-bot]

🦋 Changeset detected

Latest commit: 9f5671d

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

This PR includes changesets to release 21 packages

Name	Type
@livekit/agents-plugin-deepgram	Patch
@livekit/agents	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-baseten	Patch
@livekit/agents-plugin-bey	Patch
@livekit/agents-plugin-cartesia	Patch
@livekit/agents-plugin-elevenlabs	Patch
@livekit/agents-plugin-google	Patch
@livekit/agents-plugin-hedra	Patch
@livekit/agents-plugin-inworld	Patch
@livekit/agents-plugin-lemonslice	Patch
@livekit/agents-plugin-livekit	Patch
@livekit/agents-plugin-neuphonic	Patch
@livekit/agents-plugin-openai	Patch
@livekit/agents-plugin-phonic	Patch
@livekit/agents-plugin-resemble	Patch
@livekit/agents-plugin-rime	Patch
@livekit/agents-plugin-sarvam	Patch
@livekit/agents-plugin-silero	Patch
@livekit/agents-plugin-xai	Patch
@livekit/agents-plugins-test	Patch

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[devin-ai-integration]

✅ Devin Review: No Issues Found

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

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