Systems and methods for invoking a third-party program as an additional participant of a chat session include monitoring events of a chat session of a messaging platform. At least one of the events of the chat session is determined to satisfy a triggering condition associated with a third-party program. In response to determining that the at least one of the events of the chat session satisfies the triggering condition associated with the third-party program, the third-party program is invoked as an additional participant of the chat session.