They all feel kinda monadic'ish to me (and the term monad is used several times in TFA) and I kinda dig them when coupled with "enhanced" threading macros that shall short-circuit on an error but...

How'd that all work with Clojure spec? I use spec and spec on functions (defn-spec) all the time in Clojure. It's my way to keep things sane in a dynamic language (and I know quite some swear by spec too).

I'd now need to spec, say, all my maps so that they're basically a "Maybe" or "Either" with the right side being my actual specc'ed map and the left side being specc'ed as an error dealing thinggy?

Would that be cromulent? Did anyone try mixing such idiomatic error handling in Clojure mixed with specs and does it work fine?