ClojureTV

Join us for #Clojure/Conj 2026: a full day of workshops on Wednesday, September 30, followed by two conference days on Thursday, October 1 and Friday, October 2. Expect great talks, hands-on learning, and social events designed to help you connect with the Clojure community. See the full schedule on the website and get your ticket today at https://2026.clojure-conj.org/

As developers we spend time in the terminal every day. It's a familiar and powerful environment, with its own idioms and conventions. With babashka we gained a Clojure runtime with fast startup time, making it feasible to build small command line utilities in Clojure, for ourselves, our colleagues, or others. But these kind of CLI scripts often feel a little alien. They break the principle of least surprise, by not or only haphazardly following established conventions for command line argument behavior, help text, handling of subcommands, etc. We do already have libraries like tools.cli, but they still require significant boilerplate. Lambdaisland/cli is a new take on command line argument handling. It sets itself apart by very low boilerplate and intuitive syntax, leveraging var metadata for concise definition of subcommands, and by adopting a more process driven model, rather than a strict parsing/handling separation. We'll walk you through some examples from trivial to complex, and talk about how this can benefit you as a developer, as well as your team.

The Clojure Dev Team discusses what they've been up to and things coming up soon.

The Clojure Documentary was released on Apr 16th, 2026 at https://www.youtube.com/watch?v=Y24vK_QDLFg. The next day, Rich Hickey and some of the people featured in the documentary gathered for this informal Q&A session.

A step by step guide to get Clojure up and running from scratch on Windows. You will finish with a live REPL connected to an empty project and be ready to start writing code. To learn more about the utility of a REPL: https://clojure.org/guides/repl/introduction To learn more about the using the Clojure language: https://clojure.org/guides/learn/clojure 0:13 Install JDK: adoptium.net 0:28 Clojure CLI releases: https://github.com/casselc/clj-msi/releases 0:52 git clone https://github.com/clojure/try-clojure.git 1:05 Install VSCode 1:31 Install Calva 1:54 Connect REPL 2:09 Eval Code