fix(google): strip Gemini thought summaries

[rosetta-livekit-bot]

Summary

Ports livekit/agents source change 9dc8f8613 / #6428 to agents-js.

• Strip Gemini text parts flagged as thought summaries before emitting assistant content.
• Add mocked Google LLM stream regressions that verify thought text is omitted and thought-only responses retry.
• Add a patch changeset for @livekit/agents-plugin-google.

Source diff coverage

Coverage classification

• livekit-plugins/livekit-plugins-google/livekit/plugins/google/llm.py: ported to plugins/google/src/llm.ts; added equivalent filtering for Gemini part.thought text parts in LLMStream.#parsePart. The source retry-loop adjustment is already present in agents-js as chunksYielded only becomes true when parsing returns a chat chunk, so thought-only turns remain retryable without an extra loop change.
• tests/test_plugin_google_llm.py: adapted to plugins/google/src/llm_request.test.ts; the Python test directly calls _parse_part, while agents-js uses a JS private method (#parsePart), so the target tests drive the existing mocked generateContentStream path. They assert collected text excludes thought summaries and thought-only responses retry before yielding visible output.

No source files were classified as not applicable.

Validation

• pnpm build
• pnpm --filter @livekit/agents-plugin-google lint (passes with three pre-existing warning-level Google realtime no-explicit-any findings)
• pnpm test plugins/google (30 passed, 2 skipped)
• Prettier check and git diff --check
• API Extractor analysis is not green because this package has no committed API-report baseline; this private parser/test change does not alter exported API.

Cue voice E2E

Verified exact commit e723720d8907501dc7771b30a4a40362022a4923 in fresh Cue voice mode with real Gemini gemini-2.5-flash, thought summaries enabled, LiveKit Inference Deepgram STT, and Cartesia TTS.

• Session: sid_8786fbd59582
• Input: Compute 137 times 29. Think carefully before answering.
• Path evidence: four real Gemini text parts arrived with thought=true and were dropped by plugins/google/src/llm.ts.
• Persisted assistant content: exactly VISIBLE_ONLY_2039; no thought-summary text reached transcript or TTS.
• Predicate required the exact assistant output and AS_SPEAKING -> AS_LISTENING, so it waited through playout completion.
• Result: resolved, exit code 0.
• Artifacts: persisted events.jsonl, result.json, full-session WAV, and per-command WAV; both WAV channels are non-silent.

---

Ported from livekit/agents#6428

Original PR description

todo: expose in separate field in chatitem ?

[changeset-bot]

🦋 Changeset detected

Latest commit: e723720

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-plugin-google	Patch
@livekit/agents	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-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-plugin-trugen	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 bugs or issues to report.