Totally just spitballing, I know nothing about this.

Thinking about the problem, it seems like it would be extremely difficult to come up with a set of design rules that cover everything somebody might want to print.

But would it be possible to literally simulate the printing process? Maybe using some kind of CFD code? I mean, for arbitrary designs this could get really complex. But, there’s a hard limit—the thing actually has to get printed, which is a slow mechanical layer-by-layer process, and the end result has to fit in the print chamber, haha.