park.fish lets you park your current command line in a temporary buffer to the side.
It is useful for when you forget a necessary step before the current command you're typing, and you don't want to re-type the current command.
You finally figure out that perfect commit message, only to realize you need to stage another file. Hit Ctrl-Q to park:
$ git commit -m "Carefully crafted commit message involving evil race condition Ctrl-Q
The command line is saved, and cleared, allowing you to stage the file:
$ git add main.cEnter
...and then the parked command line is magically restored:
$ git commit -m "Carefully crafted commit message involving evil race condition
Send a PR if you want the keybinding to be configurable.
MIT