- For major projects, maybe go to individual oral interviews over major student products. If they did it they'll know it inside and out when you talk to them about it. If they can't talk about their own submitted work, zero.
- I'm 100% in favor of flunking students who use AI to complete assignments, which is also known as cheating. More importantly, they're cheating themselves. Learn the content, do the work, and earn the grade. If they fail the course, then they fail.