Do you use if guards in for-comprehensions? You don't, right? They are practically unusable. ❌ This pre-SIP discussion wants to change that, and from the first draft, it looks very promising. This would increase our everyday quality of life significantly!

Scala Contributors

Pre-SIP: if-else Guards in For-Comprehensions with Custom Error Values

btw, conceptually the same as ‘Step 2’ in From freeing \leftarrow. to better for and unification of direct and monadic style

Skunk v1.0.0 was released 🎉 This one is packed with the good stuff! ✅ Scala Native 0.5 support ✅ otel4s replacing Natchez ✅ A new fluent API for building sessions ✅ Unix domain sockets & peer auth 👋 Scala 2.12 Smoke out the full changelog! 👇

GitHub

Release v1.0.0 · typelevel/skunk

Finally! Nearly three years since the 0.6 release, Skunk 1.0.0 is final! This release supports Scala 2.13 & 3 for the JVM, JS, and Native 0.5. Ther...

#scala

For all the curious Java developers out there, here is a quick look at how to use Scala 3 with Spring Boot. But as the author says: "I have to warn you: you'll actually fall in love with this language very quickly. It's really easy to use and makes so much more sense than #Java in a lot of ways."

The only article (well, it's actually a series) about observability you need to read! Recommended by Azuros Cloudapi to both Java and Scala camps! 😂 #java #scala It breaks down the foundations of OpenTelemetry - covering traces, metrics, logs and context propagation and how otel4s brings these concepts into the purely functional Scala world using Cats Effect 🐱

Maksym Ochenashko

Practical observability: foundations with OpenTelemetry

A practical introduction to observability foundations: telemetry signals, context propagation, OpenTelemetry, and otel4s.

A cool new CLI tool which helps you discover running Scala-related processes. 📈 It would be awesome if it had an interactive mode so I could kill those zombies right from it! 🧟‍♂️ #scala

Imagine you could derive an Encoder for both Scala 2.13 and Scala 3 without Shapeless or Mirrors. All with just one API, faster compilation and better error messages. 🤯 (<- the only appropriate reaction to this) That's exactly what Kindlings does. Currently it can replace derivations for libraries like Avro4s, Jsoniter, PureConfig or Tapir. Time to give it a test run! 🏃

GitHub

GitHub - kubuszok/kindlings: Hearth fire starter

Hearth fire starter. Contribute to kubuszok/kindlings development by creating an account on GitHub.

#scala

http4s 0.23.34 is out 🎉 #scala The Typelevel stack is now almost completely on Scala Native 0.5: ✅ Cats Effect ✅ fs2 ✅ http4s ✅ Weaver ❌ Skunk

GitHub

Release v0.23.34 · http4s/http4s

This release brings support for Scala Native 0.5. What's Changed http4s-core Update Scala Native to 0.5.10 by @iRevive in #7708 http4s-client En...

I know I've posted about it several times, but sbt 2.0 is truly just around the corner! After checking the list of plugins that are already cross-published, it looks like we're gearing up for a very smooth migration 🤞 Anyway, if you have some spare tokens, consider helping out the ones that aren't quite prepared yet! Check the status and see where you can contribute here:

GitHub

sbt 2.x plugin migration

sbt, the interactive build tool. Contribute to sbt/sbt development by creating an account on GitHub.

#scala

Metals v1.6.7 is out! 🚀 Thanks to @Michał Pawlik , the MCP server now supports stdio! What does this mean for you? No need to run a standalone MCP server in a different terminal and no need to configure HTTP ports anymore! Great job! 👏 #scala

Metals v1.6.7 - Osmium | Metals

I was afraid that I'm the only one who feels the huge traction and positive vibes in the last 2-3 months! ❤️ Because let's be real, the last couple of years in Scala were very hard and a lot of people left. But the sentiment changed, I feel it in the water. (I smell it in the air.) #scala

My other passion (besides #Scala) is databases. There is an extension called pgmq, a message queue built on top of Postgres which can cover the scale for 99% of companies. To connect the two passions, I'm building a Scala client called pgmq4s. 🧵 The question is - do you really need Kafka's performance if you already use Postgres? Imagine being able to debug messages with standard SQL, re-order or edit messages in place, or even join your queues directly with regular tables.

Scalac is starting a new blog series for managers and engineering leaders. 👔 It's great that it isn't just another news aggregator, but instead focuses on real architecture lessons and trade-offs. After all, if people just want news, they could just follow me! 😀 #scala

Scalac - Software Development Company - Akka, Kafka, Spark, ZIO

THE SIGNAL: What matters in distributed systems | #1

Join SIGNAL as we dive into Scala and its role in modern architecture. Learn lessons from real-world engineering challenges.

Speaking of Actors, there is a new research paper which tries to solve a problem when you need a combinations of messages to trigger a specific task. The paper introduces JoinActors, a macro-based library for Scala 3 that brings guarded join patterns to the actor model. #scala 👉

GitHub

GitHub - a-y-man/join-actors: JoinActors: Fair Join Pattern Matching for Actors

JoinActors: Fair Join Pattern Matching for Actors. Contribute to a-y-man/join-actors development by creating an account on GitHub.

👉

The Art, Science, and Engineering of Programming

JoinActors: A Modular Library for Actors with Join Patterns

Join patterns are a high-level programming construct for message-passing applications. They offer an intuitive and declarative approach for specify...

Cats-Actors 2.1.0 just went cross-platform! 🚀 Choose JVM for throughput, Scala Native for instant startup or Scala.js for the browser. Read the full article with a live monkey banana battle! 🐒🍌

Cats-Actors 2.1.0 Goes Cross-Platform

Imagine writing your actor logic once (typed messages, functional state, the ! operator, supervision and all) and then deciding on a whim whether i...

#scala

💡 If you make a library, you should be its first user. Using your own tools is the best way to see what works and what doesn't.

Hearth aka the Scala unified macro for 2.13 and 3 has a new version out! 🎉 I'm definitely no macro expert, so go read the changelog yourself to see all the magic. 🪄 It's huge!

GitHub

Release 0.3.0 - Standard Extensions, Union Types, Rules, Flame Graphs, MIO Timeouts, hearth-munit, and Much More · kubuszok/hearth

This is the biggest Hearth release so far: a major feature release that introduces Standard Extensions — a pluggable type-inspection framework �...

#scala

Scala language is yet again setting the standard that other languages will inevitably steal in 5 years! From now on, it goes AI-only, forbidding human-written code at all! The future is here, and it doesn't need our egos holding back the compiler! 🤖🧠

Scala Contributors

New policy for contributing to the Scala language

Scala development goes AI-only, forbids human-written code! On February 24, 2026, we merged scala/scala3#25326, introducing a formal policy for the...

A new, code-first Protobuf library for Scala! Think of it as a Tapir for gRPC services. 👌 Read the full article from Pierre Ricadat to learn why he built it and the benefits it brings. 👇

Protobuf Goes Scala-First

My journey toward regaining developer productivity while working with Protobuf in a large Scala codebase.

#scala

Scala 3.8.3 is out 🎉 Besides the ported optimizer, it features a local on/off coverage switch. 🔄

GitHub

Release 3.8.3 · scala/scala3

Release highlights Add support for local coverage on and off with // $COVERAGE-OFF$ and // $COVERAGE-ON$ #24486 Deprecate for removal -print-lines...

#scala View quoted note →

A nasty vulnerability was found in sbt! ⚠️ Specifically, a command injection flaw affecting Windows users when resolving source dependencies. The good news is that it's already fixed. If you build on Windows, make sure to update your project to sbt 1.12.8 or sbt 2.0.0-RC10 immediately.

Fixing a Command Injection Vulnerability in sbt

During our ongoing work on sbt 2, we discovered and fixed a command injection vulnerability affecting sbt on Windows.

#scala