There is a new addMissionEventHandler command, but only supports one type (ended). I am requesting that the creation, updating, cancellation, completion or failure of tasks (setTaskState) be included as a Mission Eventhandler.

This functionality will easily allow mission makers to fire off scripts/events based on the completion or state of tasks.

There is no easy way to trigger events from tasks today and this seems like a suitable addition to the MissionEventHandler functionality.