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fix(gemini realtime): deep-merge nested config in follow-up session update

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Previously, the follow-up setup performed a shallow merge between the
original setup and new overrides. If a session.update touched any field
inside generationConfig (e.g. modalities), the entire generationConfig
would be replaced, silently dropping unrelated sub-keys like temperature
or maxOutputTokens. Apply the same deep-merge to realtimeInputConfig so
partial automatic-activity-detection updates don't drop other realtime
input config fields either.

Co-authored-by: Yassin Kortam <yassin@berri.ai>
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Cursor Agent 2026-05-22 21:33:07 +00:00
parent 76a82447e8
commit a0043494a0
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1 changed files with 21 additions and 0 deletions
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21
litellm/llms/gemini/realtime/transformation.py
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@ -349,6 +349,27 @@ class GeminiRealtimeConfig(BaseRealtimeConfig):
**new_overrides,
"model": f"models/{model}",
}
# Deep-merge nested config dicts so that a partial session.update
# (e.g. only ``modalities``) does not silently drop unrelated
# sub-keys (e.g. ``temperature``) from the original setup.
original_generation_config = original_setup.get("generationConfig")
new_generation_config = new_overrides.get("generationConfig")
if isinstance(original_generation_config, dict) and isinstance(
new_generation_config, dict
):
follow_up_setup["generationConfig"] = {
**original_generation_config,
**new_generation_config,
}
original_realtime_input_config = original_setup.get("realtimeInputConfig")
new_realtime_input_config = new_overrides.get("realtimeInputConfig")
if isinstance(original_realtime_input_config, dict) and isinstance(
new_realtime_input_config, dict
):
follow_up_setup["realtimeInputConfig"] = {
**original_realtime_input_config,
**new_realtime_input_config,
}
verbose_logger.debug(
"Gemini Realtime: Forwarding session.update as follow-up setup"
)