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fix: nest endpointingSensitivity under endpointing in sessionStart #6248

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fix: nest endpointingSensitivity under endpointing in sessionStart #6248

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10 changes: 8 additions & 2 deletions livekit-plugins/livekit-plugins-aws/livekit/plugins/aws/experimental/realtime/events.py
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Original file line number Diff line number Diff line change
Expand Up @@ -95,9 +95,13 @@ class ToolConfiguration(BaseModel):
tools: list[Tool]


class Endpointing(BaseModel):
endpointingSensitivity: TURN_DETECTION | None = "MEDIUM"


class SessionStart(BaseModel):
inferenceConfiguration: InferenceConfiguration
endpointingSensitivity: TURN_DETECTION | None = "MEDIUM"
endpointing: Endpointing
Comment on lines +98 to +104

@devin-ai-integration devin-ai-integration Bot Jun 26, 2026

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🚩 Schema change is a breaking wire-format change for the AWS API

This PR changes the serialized JSON structure sent to the AWS Nova Sonic API. Previously the session start event contained "endpointingSensitivity": "MEDIUM" at the top level of sessionStart. Now it emits "endpointing": {"endpointingSensitivity": "MEDIUM"}. This is a breaking wire-format change — if the AWS API has not been updated to accept this new schema, sessions will fail to start. Since this is an external API contract, correctness cannot be verified from the codebase alone.

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class InputTextContentStart(BaseModel):
Expand Down Expand Up @@ -374,7 +378,9 @@ def create_session_start_event(
topP=top_p,
temperature=temperature,
),
endpointingSensitivity=endpointing_sensitivity,
endpointing=Endpointing(
endpointingSensitivity=endpointing_sensitivity,
),
)
)
)
Expand Down
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