StreamErrorReason

The provider ended the turn with a finish reason other than stop (for example length), or without one.

The stream ended without a terminal marker. evidence holds whatever arrived before the end, or is null when nothing did.

A stream frame could not be parsed or had an unexpected shape.

The provider sent an error frame, or answered with a non-2xx HTTP status. detail is the provider's error payload or response body.

The connection or the body read failed.

The gateway does not implement StreamEventsGateway. No request was sent.

The provider streamed a native tool call. This API supplies no tools and executes none.