It looks like the specs in the t.d.a repo are fairly out of date now - any chance they could be brought up to date?

Yes, please file an ask Clojure question

Should that get filed under Clojure or Contrib libs?

Ah, I see the dropdown under contrib, never mind.

https://ask.clojure.org/index.php/11174/deps-edn-specs-from-tools-deps-alpha-are-out-of-date