Kickoff is heavily inspired by rofi, but not without changes made. Like many programs, kickoff was born from an itch that no existing program seemed to relieve and my desire to learn a lower level programming language.
All programs found in $PATH are included in the search results. This can include your own additions to $PATH as long as they are done before you launch kickoff or the program that launches kickoff (i.e. your window manager)
This list is then combined with your previous searches and sorted by amount of usage and if it fits the search query.
A default configuration will be placed at $XDG_CONFIG_HOME/kickoff/config.toml
or can be found here.