OptionalIncludeAsk the model for human-readable summaries of its own reasoning (Gemini includeThoughts). They
are progress narration, not assistant speech. Absent = off.
OptionalLevelHow hard the model itself reasons (Gemini thinkingConfig.thinkingLevel). A profile that cannot
honour the value logs a warning and uses its own default.
OptionalPlaneAbsent = 'local'. Fixed when the session is created.
OptionalRemoteThe remote target when Plane is 'remote'.
Reasoning-plane settings for realtime models — dual delegation configuration.