Clojurists Together Update: September and October 2026

Time for another bi-monthly update on the work that Clojurists Together are funding this year - my maintenance of nREPL, CIDER and friends. You can find the previous one here. For a change, most of my focus in September and October was on nREPL itself, not on CIDER. The big themes were the nREPL protocol spec and how well the servers and clients out there actually stick to it. For years building an nREPL server or client that plays well with the rest of the ecosystem came down to trial and error, and this time I finally did something about it. It paid off much sooner than I expected. The big highlights from my perspective: proof, a compatibility suite for nREPL servers and clients, is out, and it’s already found (and helped fix) problems in nREPL itself, Babashka, CIDER, Calva, Conjure and many other servers and clients neorepl, a brand new terminal REPL meant to be something like “CIDER in a terminal” and “CIDER for agents”, went from 0.1 to 0.4 in two weeks nREPL 1.8 is out, and…

Commenting on Bubbles has been removed. Why? If you want to talk about this post, write to the author, use the comments on their blog if it has them, or reply with a "RE:" post on your own blog. Suggestions? feedback@bubbles.town