Clojurians Log v2

Is there something like a Pathom3 migration guide? Since I built some stuff on Pathom3 now before dabbling with Fulcro, I'd like to stick with it while working through the Fulcro book. However the book and the template are still on pathom 2: https://book.fulcrologic.com/#_the_communication https://github.com/fulcrologic/fulcro-template Or maybe a project that is not too involved from which I could adapt? Or is it really just this?

(defn api-parser [query]
  (p.eql/process env query))