This looks a lot like Clojure's standard library, and you could probably steal more ideas from it, e.g transducers https://clojure.org/reference/transducers htt

This looks a lot like Clojure's standard library, and you could probably steal more ideas from it, e.g transducers https://clojure.org/reference/transducers https://clojure.org/reference/transducers