fix(avatar): handle clear-buffer RPC failures

[smorimoto]

Problem

DataStreamAudioOutput.clearBuffer() starts LocalParticipant.performRpc() and discards the returned promise. If the remote avatar participant disconnects while interruption clean-up is running, the RPC can reject with Failed to send, producing a process-level unhandled rejection even though the session can continue.

Solution

Treat the clear-buffer RPC as intentionally fire-and-forget and attach a rejection handler. Failed calls are reported through the existing logger with the destination identity, whilst the synchronous clearBuffer(): void contract remains unchanged.

This keeps interruption clean-up non-blocking and avoids changing callers for an RPC whose recipient may already be unavailable. A focussed regression test covers the rejected RPC path, and a patch changeset records the fix.

Verification

• pnpm test -- agents/src/voice/avatar/datastream_io.test.ts
• pnpm exec eslint -f unix agents/src/voice/avatar/datastream_io.ts agents/src/voice/avatar/datastream_io.test.ts
• pnpm exec prettier --check agents/src/voice/avatar/datastream_io.ts agents/src/voice/avatar/datastream_io.test.ts .changeset/catch-avatar-clear-buffer-rpc.md
• pnpm --filter @livekit/agents typecheck
• pnpm build:agents

[changeset-bot]

🦋 Changeset detected

Latest commit: 9d162b4

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

This PR includes changesets to release 37 packages

Name	Type
@livekit/agents	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-anthropic	Patch
@livekit/agents-plugin-assemblyai	Patch
@livekit/agents-plugin-azure	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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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 bugs or issues to report.

[toubatbrian]

The regression test currently uses room as unknown as Room, which violates this repository's explicit no-typecast rule.

Please replace it with a real typed Room fixture and mock only the required fields. I verified that this test-only change preserves rejected clear-buffer RPC coverage and passes the focused test, formatting, lint, agents typecheck, and build:agents.

[chatgpt-codex-connector]

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