You have bitwise-fold, but not bitwise-fold-right.   I'm not necessarily requesting it be added, but note that the natural way to implement integer->list could have used bitwise-fold-right.

And it would be clearer to mention that the "bit" values pass to proc in bitwise-fold and bitwise-for-each are booleans, not integers representing the bit (at least that's my best guess as to your intentions).