Software is the implementation, but this is a large an nuanced program. I find the most interesting aspect is that this is software specifically ignores the pilot. If the g-locked/unconscious pilot is slumped over the controls the computer will ignore his stick inputs and substitute its own best judgment of the situation. (Pilot's stick says down, computer decides to ignore and pull up instead.) That is a really powerful change in pilot culture. It conflicts with the 737-Max fiasco where we all screamed that pilots should have final authority over computers. Getting this into f-16 cockpits must have involved many very heated discussions.