Pyliner is a python based scripting engine that can monitor and control the Airliner flight software. Users can run Pyliner scripts either on the ground station or on the vehicle itself. Pyliner is used both for automated verification of the Airliner flight software, and as a more sophisticated mission planner alternative to simple way point following. Sample Pyliner scripts include a script that flys the drone in a search pattern, and a script that demonstrates a user configurable geofence. In some cases, i.e. image recognition and flight following, are prototyped in Pyliner first before being written as a native Airliner application.