libxkbcommon is a keyboard keymap compiler and support library which
processes keymaps as defined by the XKB specification. It also contains
a module for handling Compose and dead keys, a separate registry library
for listing available keyboard layouts and a fair set of CLI tools to
support keyboard layouts development.

libxkbcommon is the standard keymap handling library on Wayland and is
used by compositors, toolkits, and applications to handle keyboard state
and translate key events into characters and actions.