Clojure.spec – Rationale and Overview
clojure.spec is available in 1.9.1/alpha1 via [org.clojure/clojure "1.9.0-alpha1"] in your project.clj.<p>There is an excellent guide available here: <a href="http://clojure.org/guides/spec" rel="nofollow">http://clojure.org/guides/spec</a>