[munk-a]

Outside of the naming - this is a perfectly sane thing to do for developer comfort and can usually be accomplished with simple transformations.

There are often limitations (like manually added indentation/spacing for alignment) but as long as you're very intentional about what changes you'll allow and have a good understanding of the language it can be an extremely safe operation.

[e28eta]

I think git’s naming is actually pretty reasonable: smudge (on checkout) & clean (on stage).

[munk-a]

Oh smudge and clean are excellent names. My singly held objection to the OP was that they called one of the scripts "makenasty" instead of like "makemunkastyle" or something more neutral. I think it's an excellent idea I'd just avoid being judgemental in naming. You can consider my deep love of BSD braces super nasty but I'd prefer you didn't label it that way.