Don't get me wrong, it makes perfect sense to see the angles reported as positive values. It's just that I look after other software which lands up with negative angles (calculated in the software, rather than the angles reported by AutoCAD) and I'm used to taking into account the (anti)clockwise direction. It wouldn't be the first time this software I inherited had design decisions that don't make sense.
So, if I'm purely using the API to report line angles I can safely assume they will always be positive?