Creator of Cirru here. Cirru is confusing since it's a syntax of data, not a standalone language. Calcit(<https://calcit-lang.org/>) is the language I built. However Calcit does not store source code in files called `blabla.calcit` or something. Instead, Calcit stores code in data, which is called "Cirru EDN" since it's a variant of Clojure EDN. And it uses Cirru as a data format so stored in files called `compact.cirru` or `calcit.cirru`, which might confuse you PLDB data.
