Library/namespace is so low level as to be obvious. Breaking up code by internal boundaries is fairly well-explored territory - every language gives you a way t

Library/namespace is so low level as to be obvious. Breaking up code by internal boundaries is fairly well-explored territory - every language gives you a way to modularize. Clojure namespaces aren't unique here, though functional programming with immutable data makes it WAY easier to do so, it's not improssible in other languages.. The barriers to finishing most projects are the "final mile" - taking it to production. So in general I agree - package from the beginning. I advocate for making that the first mile. If you think you might need tests, a website, a library, and a mobile app - set up CI, a VPS with an IPv4 address, and apply for a dev account on CentralizedLangRepo and ProprietaryAppPlatform from day 1. Make it a habit to release early and often. That's the only way to earn the muscle memory for rapid iteration in any language.