16 December 2025
Christoph Neumann
Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).
Help shape the future of Clojure!
Whether you use Clojure, ClojureScript, Babashka, or any other Clojure dialect, please fill out the 2025 State of Clojure Survey and spread the word on social media.
This survey gives us the best snapshot of the Clojure community, so help us get as many participants as possible.
If you use ClojureScript or dialects like Squint, Cherry, nbb, and such, please fill out the 2025 State of ClojureScript Survey and share it with others.
Thank you for your help!
Clojure real-world-data 37: Dec 19
Scicloj AI Meetup: Agent-o-rama: Jan 17
Clojure Jam 2026: Apr 18-19 & 25-26. Online & free! CFP is open until Jan 31st.
Babashka Conf: May 8. Amsterdam, NL. Free registration, but tickets are limited!
Dutch Clojure Days 2026: May 9th. Amsterdam, NL. Join the waitlist, or the CFP is open until Jan 15th.
map operations - like adding, multiplying two maps and so on - Clojure Diary
Calva Backseat Driver fixes Easter Day - CalvaTV
GitHub Copilot coding agent with Clojure - Ambrose Bonnaire-Sergeant
Simplest Plotly Streaming Chart – Clojure Civitas - Harold Hausman
The Wrong Question About Type Systems - Furkan Bayraktar
Statistics made simple - Nikita Prokopov
Comparing FFT Implementations in Clojure – Clojure Civitas - Daniel Slutsky
Debut release
clj-simple-stats - Simple statistics for Clojure/Ring webapps
clj-artnet - A fully spec-compliant, idiomatic Clojure implementation of Art-Net 4, providing correct DMX512 over IP with deterministic behavior, predictable timing, and clean, composable APIs for real-time lighting control.
Updates
mulog 0.10.0 - μ/log is a micro-logging library that logs events and data, not words!
deps.clj 1.12.4.1582 - A faithful port of the clojure CLI bash script to Clojure
deps-new 0.10.3 - Create new projects for the Clojure CLI / deps.edn
fireworks 0.18.0 - Fireworks is a themeable tapping library for Clojure, ClojureScript, and Babashka.
bling 0.9.1 - Rich text console printing for Clojure, ClojureScript, and Babashka.
clj-threats 0.1.0 - Clojure implementation of Threagile
konserve 0.8.327 - A clojuresque key-value/document store protocol with core.async.
calva-backseat-driver 0.0.25 - VS Code AI Agent Interactive Programming. Tools for CoPIlot and other assistants. Can also be used as an MCP server.
neil 0.3.69 - A CLI to add common aliases and features to deps.edn-based projects
next-jdbc 1.3.1086 - A modern low-level Clojure wrapper for JDBC-based access to databases.
logging4j2 1.0.6 - A Clojure wrapper for log4j2
build-uber-log4j2-handler 2.25.3 - A conflict handler for log4j2 plugins cache files for the tools.build uber task.
