That’s an interesting argument having it hot-key triggered. The shell in its current form already supports hit-keys so I could plug right into your tool verbatim that way. The only issue is you call fork shell so any $SHELL specific behaviours of my shell would be lost.

I appreciate this is a personal project and sometimes there is nothing more annoying than having feature requests; but if you did ever decide to add a flag for choosing alternative shells then drop me a message ( raise it as an issue on github.com/lmorg/murex ) and I’ll add ‘up’ as an optional 3rd party plug in.