Clojure Deref (Jun 2, 2026)

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

Upcoming Events

• Clojure real-world-data 61: Jun 5
• Clojure/Conj 2026: Sep 30-Oct 2. Charlotte, NC, USA. CFP is open until June 14. Early Bird tickets.
• EuroClojure 2027: May 19-21, 2027. Prague, Czech Republic. Join the mailing list

Podcasts, videos, and media

• Building Command Line Tools with lambdaisland/CLI/Babashka - Arne Brasseur - ClojureTV
• Clojure Corner: Interview with Timothy Pratley - Flexiana
• Cross-rendering TUI to Web using charm.clj + Hyperlith - Kyle S Passarelli
• Swish: Using Claude Code to Create a Lisp in Swift - sequence utils - Rod Schmidt
• HumbleUIMiniIDE.Lesson1 - Руслан Сорокин
• HumbleUMiniIDELesson2 - Руслан Сорокин

Blogs, articles, and news

• Clojure & Co: Discover, compare and try out dialects from the Clojure family of languages. - Ingy döt Net
• Designing Kolam in Clojure Through Visit Order and Tangency – Clojure Civitas - Timothy Pratley
• jj fix 🩷 standard-clj - Mikko Koski
• My thoughts after using Clojure for about a month - Case Duckworth
• Teaching LLMs to one-shot complex backends at scale, report #1 - Nathan Marz
• Data Governance in Versioned Systems - Christian Weilbach
• Squint Browser REPL - Michiel Borkent
• cljs-ajax 0.9.0-beta1 is out - Julian Birch
• Fast HTML-to-Markdown extraction from any URL, for LLMs (r11y) - Dan Peddle
• Tracing rays with jank - Jeaye Wilkerson
• I Deleted the Hand-Written Version of BigConfig - Alberto Miorin
• Edsger – a remarkable Clojure REPL - Daniel Janus
• Started Learning Rust - Karthikeyan A K

Libraries and Tools

Debut release

• repl-agent - An MCP server that gives AI agents direct access to a live Clojure nREPL session
• continuity-auth - Respect-weighted rate limits for the open web
• lambda-sketch - Probabilistic data structures and sketching algorithms in Clojure
• pod-babashka-gozxing - A babashka pod for reading and writing QR codes, backed by the Go library gozxing (a port of ZXing).
• edsger - A reMarkable handwritten almost-Clojure REPL
• katzen - Generalized algebraic theories and categorical programming for Clojure.

Updates

• tools.build 0.10.14 - Clojure builds as Clojure programs
• clojure_cli 1.12.5.1654 - Clojure CLI
• tools.deps 0.31.1629 - Deps as data and classpath generation
• deps.clj 1.12.5.1654 - A faithful port of the clojure CLI bash script to Clojure
• memento-redis 2.0.33 - Memento cache backed by Redis
• deft 0.1.5 - A collection of macros designed to address issues with objects in Clojure.
• quiescent 0.2.6 - A Clojure library for composable async tasks with automatic parallelization, structured concurrency, and parent-child and chain cancellation
• teensyp 0.5.5 - A small, zero-dependency Clojure TCP server that uses Java NIO
• apie 1.0.2 - Apie 🙈 OpenAPI Service Validator
• fulcro-rad 1.6.24 - Fulcro Rapid Application Development
• statecharts 1.4.0-RC18 - A Statechart library for CLJ(S)
• guardrails 1.3.2 - Efficient, hassle-free function call validation with a concise inline syntax for clojure.spec and Malli
• clojure-desktop-toolkit 0.7.0 - Create native state-of-the-art desktop applications in Clojure using Eclipse’s SWT graphics toolkit.
• datalevin 0.10.18 - A simple, fast and versatile Datalog database
• optimus 2026.05.27 - A Ring middleware for frontend performance optimization.
• cli 1.30.130 - Opinionated command line argument handling, with excellent support for subcommands
• clj-oa3 0.4.0 - Clojure client library for OpenADR 3 (Martian HTTP, entity coercion, Malli schemas)
• svar 0.7.0 - Type‑safe LLM output for Clojure. Works with any text‑only model.
• portal 0.65.0 - A clojure tool to navigate through your data.
• partial-cps 0.1.55 - A lean and efficient continuation passing style transform, includes async-await support.
• spindel 0.1.15 - Cross-platform FRP runtime with a git-like memory model.
• cljs-ajax 0.9.0-beta1 - simple asynchronous Ajax client for ClojureScript and Clojure
• deps-new 0.12.2 - Create new projects for the Clojure CLI / deps.edn
• ghosttyfx 0.1.169.11 - Cljfx wrapper of GhosttyFX
• pg2 0.1.49 - A fast PostgreSQL driver for Clojure
• let-go 1.9.0 - Almost Clojure written in Go.
• gsheetplus 1.1.3 - Low-level and high-level wrapper to work with Google Sheets. Reading, writing and sheet management.
• phel-lang 0.41.0 - A functional, Lisp-inspired language that compiles to PHP. Inspired by Clojure, Phel brings macros, persistent data structures, and expressive functional idioms to the PHP ecosystem.
• cryogen 0.7.9 - A simple static site generator written in Clojure
• Selmer 1.13.4 - A fast, Django inspired template system in Clojure.
• fulcro-tui 1.0.2 - A JLine-base TUI wrapper, allowing you to write TUI projects in CLJ or Babashka via Fulcro
• plotje 0.3.1 - simple and easy plotting
• squint 0.12.193 - Light-weight ClojureScript dialect
• mokujin 1.0.0.120 - 🪵 Structured logging for Clojure. Thin layer on top of clojure.tools.logging with MDC support
• edn.c 8c0869c - A fast, zero-copy EDN (Extensible Data Notation) reader written in C11 with SIMD acceleration.
• nippy 3.7.0-RC2 - Fast serialization library for Clojure
• tyrell 1.0.0-RC10 - Clojurescript WebComponents library
• lacinia 1.3.0 - GraphQL implementation in pure Clojure
• clojure-lint-action 9 - A GitHub Action that lints clojure files with clj-kondo and generates comments with reviewdog on pull requests to improve the code review experience.
• dataspex 2026.06.1 - See the shape of your data: point-and-click Clojure(Script) data browser