extremely nice but terse, neither human nor AI slop

Reading this, anyone give great advice on formulating take home projects that work really well in the AI age? I ran an interview cycle where I gave ~1 day, and tried to hold out some technical questions for a follow up design interview after they had delivered the take home. I felt like the project was very hard to define given AI lets people chew through most of what you throw in front of them very quickly. Giving a bigger project felt like it required drawing them too deeply into our domain, where I was trying to provide a slice of it that we could onboard candidates to in ~45 minutes. Given that the authors here are getting multiple weeks to do it, its hard for me to imagine an appropriate scope.