Question: how to activate some malli's function spec anytime

[MokkeMeguru]

Hello, I'm now write some toy-server program with malli.
I want to write malli spec in all functions.
however, I want to activate some I/O function's spec anytime (in production, too).

I want to know some models to write this anytime spec activated function.

I now wrote ...

(defn always-speced
   {:malli/schema =>always-speced 
    :doc  (with-out-str (clojure.pprint/pprint [:function (rest =>always-speced)]))}
   [arg]
   {:pre [(or (m/validate Arg arg) (throw (ex-info "invalid arg" {:code 422 :input arg :explain (me/humanize (m/explain Arg arg))})))]
    :post [(or (m/validate Result %) (throw (ex-info "unexpected result" {:code 500 :input arg :explain (me/humanize (m/explain Result res))})]}
   ;; body
   res
)

it's a little hard to read... 😢