@sarna.dev You might find “An idiom’s guide to formlets” helpful: https://homepages.inf.ed.ac.uk/slindley/papers/formlets-tr2008.pdf It is from the “Links” group that originated formlets, and thus uses their syntax for the examples, not Racket’s. It’s sort of a companion to the paper referenced at the top of the Racket formlet docs, “The Essence of Form Extraction” (and it would probably be worth adding it to the docs, too).