I wish cross-compilable macros, with potential to provide UX that mops the floor with all these shapeless/mirrors based-libraries were not just a hypothetical possibility... Oh, wait. Scala 2.13: scastie.scala-lang.org/MateuszKubus... Scala 3: scastie.scala-lang.org/MateuszKubus...

Claude just finished writing me a sbt codegen, which generates >17 000 lines of code of macros and compiler plugins... which would be expanded in other macros to provide cross-compilable type constructor representation. When I started Hearth I didn't expect to go so meta

On this day ten years ago, I gave my first public presentation... Fast forward ten years, I still suck :) kubuszok.com/presentation...

🔍 A thoughtful, down-to-earth look at what a shared macro library could mean for Scala developers. Here’s "Can we have the Standard Library for Macros?" by Mateusz Kubuszok

🔍 A thoughtful, down-to-earth look at what a shared macro library could mean for Scala developers. Here’s "Can we have the Standard Library for Macros?" by Mateusz Kubuszok

New video, with Łukasz Biały from @scala_space! https://www.youtube.com/watch?v=K_omndY1ifI

@scaladays.org videos are online! If you wish #scala #macros were a bit easier, and wonder what "this Hearth library" is about, go see: youtu.be/VOdeXTpw3m0

Scala Times Issue #604 - scalatimes.com/f99e9094b8

Hearth 0.2.0 just dropped continuing the quest for user-friendly macros. #scala #macros github.com/MateuszKubus...

Welcome Mateusz Kubuszok as the #Scalarconf 2026 speaker! 🎙️ Can we have the Standard Library for Macros? 🎟️ Grab your ticket here: scalar-conf.com/tickets #scala #scalarconf #functionalprogramming

This is probably the most complete tutorial on typeclasses in Scala 3, it's basically a short book. Bookmark it, as it has everything: givens, derivation, mirrors, inline defs, macros... you name it. #scala kubuszok.com//2025/sanely...

#scala #metaprogramming #typeclasses because, of course, I forgot

I haven't blogged in a while, but this needed to be written: kubuszok.com/2025/sanely-...

Chimney 2.0.0-M2 for 2.13.17+ and 3.7+ just landed! * sanely-automatic derivation backported to 2.13 * aligned with featues/bugfixes up till 1.8.2 Try out, if you had any issues with semiauto on Scala 3.7 or if you want to test sanely-auto on 2.13! github.com/scalalandio/...

Great thanks to all organizers of @scalaio.bsky.social! It was a great experience I am happy I could be there.

The first release is done, better macros are possible github.com/MateuszKubus...

Can we have the Standard Library for Macros? (@kubuszok.com): makes simple things simple, and hard things (at least) possible 🚀 Event Sourcing is just a foldLeft on Events and a decide function! Or is it? (Matthieu Baechler & Thomas Hilaire): master of immutability but UPDATE db all day long ? 👀

Thank you everyone who came to my talk at @scaladays.org ! It was amazing to be here! You can find my slides at mateuszkubuszok.github.io/ScalaStandar...

That #Scala code does something, that many considered impossible. Could you guess why? github.com/MateuszKubus...

If you're missing some feature in Chimney - contribute it! github.com/scalalandio/...

Some time ago I made a presentation that wasn't recorded... But at least some of the points from it could be showcased with this gist gist.github.com/MateuszKubus...

It seems #Scala folks are interested in macros once more! So, let's meet at the @scaladays.org 2025 to talk why we would want some standard library for them and how!

I had hardly any exposure to Apache Spark, and Databricks is mostly irrelevant to me... Still I am curious why nobody in my circle noticed that Databricks released runtime for Scala 2.13. Now only sbt is the reason to keep publishing for 2.12 docs.databricks.com/aws/en/relea...

🚀 Metals v1.5.3 is here! Introducing: - MCP server support for AI agents - new inlay hints for named/by-name parameters -improved test discovery for ZIO - better auto-fill arguments - using directives worksheet support. Try it now! #Scala #IDE scalameta.org/metals/blog...

If you've been affected by Scala 3.7.0 given resolution change, and Chimney started failing in some case - try out 2.0.0-M1. github.com/scalalandio/...

Slow-Auto, Inconvenient-Semi: escaping false dichotomy with sanely-automatic derivation by @kubuszok.com Subscribe to our our YouTube channel so you don't miss the rest of #scalarconf videos.

Really interesting comparison between automatic vs. semi-automatic type class derivation and their impact on performance. #scala https://youtu.be/M54ux51H6Fo

As promised we are working hard on providing you with the Scala MCP server, we already have a WiP pull request ready and some courageous souls are actually testing it! You can take a look and already give some feedback at github.com/scalameta/m...

With our new Scala MCP server we are able to eliminate hallucinations and unproductive guesswork for code that LLMs aren't familiar with by exposing API shapes from the caches of Metals and the Scala compiler.

Thank you @scalar-conf.com for yet another amazing conference and for having me there! See you next year!

Scala 3.7.0-RC1: Expr.summonIgnoring works! (vide github.com/scala/scala3...) I updated my benchmarks, now I'll have to update my slides for Scalar

Scala Projects Maintenance Survey results, still fresh from the oven are there! With over 100 responses from tech leaders and managers from our community to shed some light on how Scala fares. (1/4)

Chimney 1.7.0 with: - transformation from more than 1 value - recursive Patchers - and much more! Easily one of top 3 Chimney releases (next to 0.8.0 - with Scala 3 support - and 1.0.0 - with stable API) github.com/scalalandio/...

- I wonder why these functionalities takes them so long, it's just a few simple changes - a few simple changes: github.com/scalalandio/...

Chimney 1.6.0 with some QoL improvements! github.com/scalalandio/...

I looked at my OSS Sonatype stats. About 1/2 of Chimney users on 2.12 and 1/3 users on 2.13 is still on using 0.6.2 or older. When I look up these on GH, I often find projects which are still maintained and update all the other dependencies. I wonder why they skip Chimney.

3+ years ago I wrote an article about modeling domain in Scala. I intended it to be the first part of a series. I wanted to revisit and actually publish it once I have pt 2 done and pt 3 started... ...but 3 years later is was still in the drawer so... kubuszok.com/2024/modelin...

My local bar knows my language

I feel silly that I haven't though about it earlier but: If your company uses github.com/scalalandio/... and don't mint saying it, please add it to the list of adopters 😊

Welcome Mateusz Kubuszok as the next #Scalarconf speaker! Slow-Auto, Inconvenient-Semi: escaping false dichotomy with sanely-automatic derivation. Grab your ticket 🛒 sml.io/tickets #scala #functionalprogramming