when the stepper motor stalls..

In the event of the stepper motor stalling, I want to the motor to automatically stop without using additional sensors. is there a code that exists for this purpose? or any ideas?

ksshhs: In the event of the stepper motor stalling, I want to the motor to automatically stop without using additional sensors. is there a code that exists for this purpose?

No.

If it stalls it has stopped. A stepping motor is not like a DC motor, when it is not being stepped it s the same as when it has stalled.