Like, say I found one that skipped a bossfight or something, that would be permitted?

note that I did NOT find one that skipped a bossfight, just asking for the future

When a glitch like that would be found, I think the community would talk about it, seeing how close-knit we are (and active!).

A boss fight skip would fit within "All Stages", if a stage-complete flag would be met. And please find motor-skip. However, this would probably not be cool beans for the Psychotherapy boss fight, as the whole point for that category is fighting the therapist.