Method handler

python/copilot/session.py:1613–1638

(event: SessionEventTypeAlias)

        first_assistant_message_logged = False

        def handler(event: SessionEventTypeAlias) -> None:
            nonlocal first_assistant_message_logged, last_assistant_message, error_event
            match event.data:
                case AssistantMessageData():
                    last_assistant_message = event
                    if not first_assistant_message_logged:
                        first_assistant_message_logged = True
                        log_timing(
                            logger,
                            logging.DEBUG,
                            "CopilotSession.send_and_wait first assistant message",
                            total_start,
                            session_id=self.session_id,
                        )
                case SessionIdleData():
                    log_timing(
                        logger,
                        logging.DEBUG,
                        "CopilotSession.send_and_wait idle received",
                        total_start,
                        session_id=self.session_id,
                    )
                    idle_event.set()
                case SessionErrorData() as data:
                    error_event = Exception(f"Session error: {data.message or str(data)}")
                    idle_event.set()

        unsubscribe = self.on(handler)
        try: