This just sounds like a bad idea, a solution in search of a problem. Sure, sudo is a setuid binary, but it’s a fairly simple program, and at some point, you have to trust the code. It’s also a very fundamental piece of the system that you want to always work, even (especially!) when other things get borked. The brief description of run0 already has too many potential points of failure.

it took less than a day for someone to break run0 totally open, so basically, you have a choice between a well tested/debugged sudo and this new thing which may eventually mature