A filter for regolith that allows you to insert molang.
regolith install molang_insert
Or
regolith install github.com/Hatchibombotar/useful-regolith-filters/molang_insert==latest
Place a file called <identifier>.molang inside of the molang insert's data folder. You will now be able to insert it into any json file where molang is supported by writing molang.insert(<identifier>)