Another author here (Emil). It's been a pleasure and a great learning experience working with Prismatic (and Climate) on this. Hopefully it'll show that, given enough macros and coffee, all problems are shallow, or something to that effect.
I've been a big follower of your entire team, specifically on their talents in machine learning and NLP (e.g. http://nlp.stanford.edu/jrfinkel/papers/jrfinkel-thesis.pdf). The fact that you also use Clojure and give back so much is icing on the cake. Thank you!