OK, you can all laugh about me holding a coffee cup all the way through a talk without my noticing now. youtu.be/119qVkHxPkM?... #clojure #cljKondo #babashka

Spent an hour looking into adding async/await support to CLJS. Turns out it's not so difficult. I'm sure there's a few edge cases to iron out, but doable. github.com/borkdude/clo... #clojure #clojurescript

My November and December Clojure OSS project updates blog.michielborkent.nl/oss-updates-... Thanks to all users, contributors and sponsors! Happy new year! #clojure #squintcljs #clojurescript #babashka #cljKondo

I got this email: "Rich, Your creation of Clojure <sycophantic blather worthy of a third grader's homework assignment to write a letter to a public figure you don't know, using sources you don't understand, to express an emotion unfelt, with no intention whatsoever> Claude Haiku 4.5" Thanks AI!:

Joy to the world! (prog version, with Neal Morse, Mike Portnoy, Steve Hackett and Roine Stolt) www.youtube.com/watch?v=5mhg... 🎄

New clj-kondo release just before xmas! #clojure #cljKondo

A #clojureconj memory with some dear fellow Clojurians and mr. Clojure himself! #clojure

Clojurists Together members can vote for long term support again. I announced my plans for 2026 in this blog here: blog.michielborkent.nl/thanksgiving... If you are a member, voting would be much appreciated. Go vote! #clojure #babashka #cljKondo #squintcljs

You can play Advent of Code on the squint and cherry playgrounds this year. Provide token (see cookies: session after logging into adventofcode.com) to get puzzle input. Squint: squint-cljs.github.io/squint/?src=... Cherry: squint-cljs.github.io/cherry/?src=... #clojure #squintcljs #cherrycljs

We have a #babashka_conf space and people are off the waitlist! oba.nl/nl/oba-congr... Any company wants to sponsor this venue so your name is going to be on the (future) conference website and more? #babashka www.meetup.com/the-dutch-cl...

Wow, babashka conf 2026 registration wasn't even open for a week and all 50 places are gone, 5 on waiting list. I'm going to try to book a venue that fits 70 so hopefully all on the waiting list + a few more can fit in... fingers crossed. www.meetup.com/the-dutch-cl... #babashka_conf

A thank you note to my sponsors! blog.michielborkent.nl/thanksgiving... #babashka #clojure #cljKondo #squintcljs #scittlecljs

Happy to see this being used. #clojure macros are easier and easier to support together with static analysis in #cljKondo. Eventually I want running macros from source to be near zero-friction. Something I'll hopefully look at in 2026. github.com/weavejester/... #clojure

Very cool slide by Burin Choomnuan about what worked and what didn't to convince your colleagues to use #clojure (via #babashka) in his company,

Note about #babashka_conf: CfP will open after CfP of @ClojureDays closes. We can't pay for travels (unless we unexpectedly get lots of sponsors which I haven't thought about). So if you consider doing a talk but can't pay your way here, consider applying for @clojuredays CfP too #clojure #babashka

Looking for a space to host a software mini-conference (BabashkaConf 2026) for 50-60 people 8th of May 26. We need chairs, a beamer, some coffee/water. What are good options in Amsterdam or near? Perhaps someone at a company university is interested in co-operating? #clojure #babashka #babashka_conf

The DevRels of #clojure and #babashka!

Finally! I hope we won't have wait 5+ years for this to become a reality, though... 9to5mac.com/2025/11/19/t...

Pre-registration for babashka-conf 2026 is now open! Are you coming to Dutch Clojure Days 2026, make sure to arrive one day earlier for babashka-conf 26! www.meetup.com/the-dutch-cl... #clojure #babashka #babashka_conf

Calva uses clojure-lsp. Clojure-lsp uses #cljKondo. Clj-kondo uses #clojure. So we had to bring all these people together on one photo, including the author of Clojure! This is a photo of us being photographed by someone else btw Eric Dallo, Rich Hickey, Peter Stromberg, me, Arthur Fücher

Adding cljfmt with good startup time (29ms) to your Clojure project is easy without installing binary. bb.edn: {:tasks {cljfmt {:extra-deps {dev.weavejester/cljfmt {:mvn/version "0.15.5"}} :task cljfmt.main/-main}}} Run: bb cljfmt

Wrote a new tool: parmezan It fixes unbalanced parens/other delimiters in Clojure code. github.com/borkdude/par... #clojure

This!

Lots of reasons to love using Clojure, but Netflix reminded us of why we don’t want to use anything else… In 12 years, over 7 different versions of Clojure (from 1.5.1 to 1.12.0) they had zero migrations! I don’t know how to express how amazing that is

For fun: reagami (React-free hiccup DOM morphing lib) loaded in scittle from source (directly from Github). Works like a charm, except that SCI doesn't support js-in yet (which is easy to fix, example includes patch). gist.github.com/borkdude/443... #clojure #scittlecljs

Cool fact. Did you know that the name Scittle was invented by @lambdasierra.com? Such a great name for this project. Thank you :-) github.com/babashka/sci... #clojure #clojurescript

For someone who doesn't like shopping for new clothing that much, a developer conference like the #clojureconj where you get t-shirts and socks are so nice!

Had a blast at the #clojureconj (my first ever). Met so many familiar and new faces, almost non-stop. Can't believe it's already over and I'm on my way back tomorrow! #clojureconj2025

In edamame you can now provide a function for :features so you can pick the first, if you just want to scan the file for syntax errors and just read it 1x user=> (e/parse-string "#?(:mylang :dude :clj 1 :cljs 2)" {:read-cond :allow :features (constantly true)}) :dude #clojure

A mashup between reagami and webcomponents. I don't know why you would do this, but you can! #clojure #clojurescript #squintcljs squint-cljs.github.io/squint/?src=...

Fun matters #clojure #babashka

pr-str, prn, etc now print EDN instead of JSON in squint, as you can see in this beautiful draggable button demo #clojure #clojurescript #squintcljs squint-cljs.github.io/squint/?src=...

In edamame you can intercept the parsing of maps, so you could even return ordered maps for custom types like js/Map user=> (e/parse-string "#js/map {:a 1 :b 2}" {:map (fn [& m] m) :readers {'js/map (fn [x] (prn :x x))}}) :x (:a 1 :b 2) github.com/borkdude/eda... #clojure #clojurescript

You can't make this shit up. I wanted to implement prn (for printing EDN) in #squintcljs so I created a branch named "prn". But it turns out you can't name a file prn (or prn.extension) in Windows so Windows CI failed. Unable to create remotes/origin/prn.lock': Invalid argument

My upcoming conj talk finally fits within the "max 1 minute per slide" budget after practicing more and deleting more stuff (and not deleting much of the essence)... #clojureconj

Out of band DOM updating (manually messing with DOM elements) counter example in Reagami #clojure #clojurescript #squintcljs squint-cljs.github.io/squint/?src=...

Setting a piece of static HTML for whatever reason. Reagami doesn't make you jump through hoops to do so :) squint-cljs.github.io/squint/?src=...

Of all the "npm" (CLI) alternatives I've tried pnpm somehow has the nicest vibe to it. It's fast and I feel it doesn't get in the way as much as yarn.

Using reagami from JS codepen.io/borkdude/pen...

The on-render hook in reagami just got more awesome. You can now pass data from mount to update to unmount, by just returning data! #clojure #clojurescript #squintcljs squint-cljs.github.io/squint/?src=...

Building Browser-Native Presentations with Scittle clojurecivitas.github.io/scittle/pres... By Burin Choomnuan #clojure #clojurescript #scittlecljs

Reagami now has an on-render hook that you can use to mount/update/mount a 3rd party JS component. #clojure #clojurescript #squintcljs Demo: squint-cljs.github.io/squint/?src=...

Here are my September and October 2025 OSS highlights and updates. blog.michielborkent.nl/oss-updates-... Thanks for supporting my work! And perhaps see you at the Conj? #clojure #clojurescript #squintcljs #cljKondo #babashka

The next clj-kondo will resume linting even after paren mismatches / omissions / extra trailing parens #clojure #cljKondo

I'm trying to cut down the time of my upcoming Clojure Conj talk but every time I work on it, I end up with more slides...

This is fun

A hack to get reitit working from source in #babashka #clojure gist.github.com/jeroenvandij...

Also since this is the first public mention of the Logseq CLI, I'd like to thank @borkdude.bsky.social for #nbbcljs. Rapid development and reuse of Logseq's core for the CLI is possible thanks to github.com/babashka/nbb

Edamame, a configurable parser for EDN and Clojure code now supports ClojureCLR! Thanks to Ambrose Bonnaire-Sergeant. github.com/borkdude/eda... #clojure #clojurescript #clojureclr

My wife is telling me to sort my DNS records out