One of the coolest things that @npub1r4y9mtc2sm020d2fa25qhzept3633ad7mstegu80ur60s4qnqs5sxsuwud created was use #krux to sign (and verify its signature) of any file in an airgapped way.
It was originally in your gist as a #python script
https://gist.github.com/odudex/3c627700df658c1509e3ca673307a509
Talking to him, I proposed the creation of an executable for any OS that can be found here: