AxsgPreviewHostCommandEnvelopeRepresents a preview helper command envelope read from the lightweight JSON-line transport.AxsgPreviewHostDesignRequestRepresents a preview design operation request for an active preview helper session.AxsgPreviewHostEventEnvelopeRepresents a preview helper event envelope written to the lightweight JSON-line transport.AxsgPreviewHostExceptionDetailsDescribes a preview exception reported by the designer transport.AxsgPreviewHostHostExitedEventPayloadRepresents the event payload raised when the preview host process exits.AxsgPreviewHostHotReloadRequestRepresents an in-process preview hot reload request for an active preview helper session.AxsgPreviewHostHotReloadResponseRepresents the completed result of an in-process preview hot reload operation.AxsgPreviewHostInputModifiersRepresents modifier state captured for preview input dispatch.AxsgPreviewHostInputRequestRepresents a normalized preview input request for an active preview helper session.AxsgPreviewHostLogEventPayloadRepresents a preview helper log event payload.AxsgPreviewHostPingResponseRepresents the payload returned for a successful preview helper ping.AxsgPreviewHostPreviewStartedEventPayloadRepresents the event payload raised when the preview URL becomes available.AxsgPreviewHostProtocolDefines stable AXSG preview helper command and event names shared by the helper transport and adapters.AxsgPreviewHostResponseEnvelopeRepresents a preview helper response envelope written to the lightweight JSON-line transport.AxsgPreviewHostStartRequestRepresents the normalized start request payload for the AXSG preview helper host.AxsgPreviewHostStartResponseRepresents the successful start response payload returned by the AXSG preview helper host.AxsgPreviewHostUpdateRequestRepresents a live XAML update request for an active preview helper session.AxsgPreviewHostUpdateResultEventPayloadRepresents the event payload raised after a live XAML update completes.