I just use my bash history with a very large HISTSIZE. Not as nice, but doesn't require any effort. Effort I never want to put in at the time I'm using the complicated command, I have other issues at that time :)
Usually I’ll have two or three konsole windows open at the same time, and I’ve noticed that only one of them appears in the bash history...is there an easy way to have it store all the history from all the windows?
https://askubuntu.com/questions/23630/how-do-you-share-histo...
It is possible to get similar effects by kludging around with bash, but it's a built-in feature in zsh.
shopt -s histappend