Title. Basically, “if a street fighter gamer and a linux tryhard had a baby” where a combination of keys is issued to run a command/script rather than a single or a simultaneous stroke of two or more. i.e left, down, left, right arrow keys, R_CTRL to run Firefox. Right, right, Up, right arrow keys, delete to power off the PC, etc.
Don’t know if such command exists, but there you go.
Bonus points if its a standalone and supports X11, Wayland and Arcan.
hyprland has this, but you have to configure it. It’s called Submaps. Some other tiling window managers/compositors (notion for example) have it too, but not to that extent. (notion can be enhanced by Lua scripting, tho.)
The idea is, after the first key of the sequence the meaning of a set of keys change. You could configure those to change the meanings again etc until you finally reach whatever depth you wanted and it performs an action.
However, be warned that hyprland is currently developed by very elitist people who like to support onky a very small set of distributions (primarily Arch btw) and have not much interest in other peoples Ubuntu shenanigens and the likes. It is extremely hard to install in Ubuntu and similar, requiring you to do minor edits to build scripts and source code in multiple languages and finding required library versions from build errors that do not mention them.
Sway and I3 as well, without the warning