Gemini realtime thinking config

[Speediing]

Description

Adds the thinkingConfig parameter to the Gemini Realtime Model in the LiveKit agents-js SDK. This change aligns the JS SDK with the Python SDK, enabling users to configure the thinking behavior of native audio models (e.g., disable thinking or use dynamic thinking).

Changes Made

• Added thinkingConfig?: types.ThinkingConfig to the RealtimeOptions interface.
• Added thinkingConfig?: types.ThinkingConfig as a constructor parameter to RealtimeModel with JSDoc documentation.
• Stored thinkingConfig in this._options within the RealtimeModel constructor.
• Passed thinkingConfig through in the buildConnectConfig() method at the top level of the LiveConnectConfig object.

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 (linting and type-checking verified)
• Make sure both restaurant_agent.ts and realtime_agent.ts work properly (for major changes)

The AI performed linting and type-checking, and verified the specific code changes were correctly implemented.

Additional Notes

Usage example:

import { google } from '@livekit/agents-plugins-google';

const model = new google.beta.realtime.RealtimeModel({
  model: 'gemini-2.5-flash-native-audio-preview-12-2025',
  thinkingConfig: {
    thinkingBudget: 0, // disables thinking
  },
});

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

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[changeset-bot]

🦋 Changeset detected

Latest commit: aee53c8

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

This PR includes changesets to release 17 packages

Name	Type
@livekit/agents-plugin-google	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-deepgram	Patch
@livekit/agents-plugin-elevenlabs	Patch
@livekit/agents-plugin-inworld	Patch
@livekit/agents-plugin-livekit	Patch
@livekit/agents-plugin-neuphonic	Patch
@livekit/agents-plugin-openai	Patch
@livekit/agents-plugin-resemble	Patch
@livekit/agents-plugin-rime	Patch
@livekit/agents-plugin-silero	Patch
@livekit/agents-plugin-xai	Patch
@livekit/agents-plugins-test	Patch

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1 out of 2 committers have signed the CLA.

✅ toubatbrian
❌ cursoragent
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[Shubhrakanti]

I would make an example and run it to make sure it works as intended.

[Shubhrakanti]

What's the default value if we send nothing?

[toubatbrian]

Then it's thinking mode by default