KGARS - Kiting Glider Automatic Relase System

I wonder if the existing back release mechanism(s) used on CG hooks would not already perform the needed function. Maybe an existing CG hook from a glider, chosen to match the towplane's structural limits, and mounted at an appropriate orientation and angle, would be sufficient.

A more sophisticated and complicated system would not only measure the rope angle, but would also sense impending loss of elevator (or even rudder) authority and release immediately.