Kittysh is a very basic bash script to open kitty startup-sessions easily. It lists all the files under ~/.config/kitty/startup-sessions and gives you the option to open a kitty startup-session with one of those files.
For ease of use, you can create a script symlink and add that symlink to a location in $PATH, like so:
$ ln kittysh.sh ~/.local/bin/kittysh; chmod +x ~/.local/bin/kittysh
This script requires fzf.