This is a collection of "admin-provided conditions" for Munki as described here.
munki-facts used to be a set of Python modules with a common runner to generate facts. With the removal of Python in munki 7 they have instead been ported to bash to provide a smooth upgrade path for organizations that previously deployed the Python facts.
The shell scripts and the lib directory should be installed in /usr/local/munki/conditions.
The scripts must be marked as executable.
Munki will run the scripts and insert any facts they generate into the dictionary of items that are used in manifest conditional_items predicates and in installable_condition items in pkginfo files.