How is this possible?

(s/conform workspace ws-clj) ;; => :cljs.spec.alpha/invalid
(s/explain-str workspace ws-clj) ;; => "Success!\n"

s/valid? also returns false.

Oh, it’s because the invocation was erring out 😕

For s/explain-str to return “Success!\n” when an exception is thrown seems like a bug.

It is typically. What’s the spec and the value?