Maccy has sensible default options that ignore content marked as confidential or coming from specific apps: https://github.com/p0deje/Maccy#ignore-custom-copy-types.
I've been using Jumpcut since 2008 when I switched to macos, and I'm pretty prone to app inertia, but that might actually make me switch. thanks.
just tried it out with unix pass which is what I use mostly and somewhat understandably it didn't manage to stop it recording it in the clipboard history. Not sure how well it can work with pure terminal apps like that.
function pass() {
defaults write org.p0deje.Maccy ignoreEvents true ;
sleep 1;
/opt/local/bin/pass -c "$@" ;
echo "Copied password to clipboard for $*";
sleep 1;
defaults write org.p0deje.Maccy ignoreEvents false;
}