Leiningen is the build tool and project manager for Clojure. Think of it
like npm (Node), Maven (Java), or pip (Python) — but designed around
Clojure's philosophy.

What Leiningen Does

• Creates and scaff

When you ask an AI to write a 500-line Terraform file, you are essentially asking it to write assembly code for your deployment. It’s brittle, verbose, and prone to “hallucinated” parameters.

The shift is simple: stop using DevOps tools like Ter

Notes

• Code

In 2026, successfully handling the machine learning data pipeline represents 80% of AI success – the model itself is just the final 20%.

Artificial intelligence has reached a turning point. The debate is no longer abou

The development of AI software is progressing rapidly. Many organizations now work with a Machine learning development company to turn early ML ideas into

I failed my first attempt horribly with Clojure during Advent of Code 2023. Once I reached the later half of the event, I just couldn't solve the problems with a purely functional style. I could've pushed through using imperative code, but I

This post walks through a small web development project using Clojure, covering everything from building the app to packaging and deploying it. It’s a collection of insights and tips I’ve learned from building my Clojure side projects, but presented in

Since February of 2026, I’ve been publishing a series of videos on implementing Swish, a Clojure-like Lisp in Swift using Claude Code. You can find it here.

Swish Logo

I used Common Lisp for a solid year in college, and really enjoyed it.

LLM coding assistants continue to become more capable at writing code, but they have an inherent weakness when it comes to reasoning about code structure. What's worse is that they assemble the picture of the code by grepping through source files a

I saw someone posted in the Clojurians Slack about something Clojure has taught them:

I’ve come to see programming as:

1. building simple systems
2. and building nice feedback loops for interacting with those systems.

There is no

This is an update on the work I’ve done maintaining Clojars in January through March 2026 with the ongoing support of Clojurists Together.

Most of my work on Clojars is reactive, based on issues reported thro

Clojure 1.12.5-alpha1 is now available! Find download and usage information on the Downloads page.

• CLJ-2945 - reify - incorrectly transfers reader metadata to runtime object

• CLJ-2228 - constantly - unroll to remove re

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

September 30 – October 2, 2026
Charlotte Convention Center, Charlotte, NC

Join us for the largest gathering of

Somewhere in 2019 I started a project that aimed to bring some of Clojure features to Lua runtime - fennel-cljlib. It was a library for Fennel that implemented a basic subset of clojure.core namespace functions and macros. My goal was simple - I enjoy

Financial regulation — Basel III, MiFID II, Solvency II, SOX — requires that risk calculations, credit decisions, and compliance reports be reproducible. Not just the code, but the exact data state that prod

Code

• project.clj

Code

In src/little_ring_things/template.clj