First Make It Correct

Starting out with a correct solution gave us clarity of thought about the problem, and a tangible way to test any other solutions that we can come up with. Property-based testing allowed us to maintain confidence even as we tried more and more daring approaches. Without the initial correct solution, none of this would be possible.
Daniel Beskin

Suspension: the magic behind composability (or: "The Kyo Monad")

Slides from LambdaDays 2025.
Flavio Brasil (@flaviowbrasil)

My experience migrating a PlayFramework app to Scala 3

Some interesting notes from the migration process.
Tanin Na Nakorn (@tanin)

Yet Another Scala 3 Migration Story

A rough summary of the experience of migrarting four services and one library, totaling more than 170k LOC.
Voytek Pituła (@Krever01)

The Elements of Kyo

All the key abstractions presented as a periodic table!

How I disabled -Xfatal-warnings in IDE (IntelliJ) but kept it in CI

On one hand, it’s an inevitable PR review and code quality boost—I no longer have to comment on unused variables or imports. On the other hand, it kills experimentation and creativity. I’ve spent countless hours fixing unused variables and imports just to test something quickly.
Łukasz Tymoszczuk

Software Delivery Excellence in the age of AI: A Fireside Chat, June 26th, Online Event

As AI-generated code becomes more prevalent, developers face new challenges: larger codebases, longer build times, and a growing gap between code and comprehension. What happens when code is technically correct but semantically opaque? How do we maintain quality, readability, and speed in a world of auto-generated tests and AI-assisted pipelines?
Martin Odersky, Hans Dockter, Trisha Gee

Scala Days, Aug 19th - 21st, Lausanne, Switzerland

Leaders from Scala User Groups and global communities, students, and language contributors will gather to discuss academic research, use cases, and visionary projects for a two-day, action-packed event.
Scala Days (@scaladays)

The Scala Workshop, Oct 13th, Singapore

The Scala Workshop is the continuation of the Scala Symposium, providing a forum for researchers and practitioners to discuss the design, implementation, and applications of the Scala programming language. Topics include language features, compiler internals, type systems, libraries, tools, and industrial applications.
EPFL

yaes 0.4.0

A shiny new effect, the Resource effect, and a bunch of interesting enhancements to the Flow data structure.
Riccardo Cardin (@riccardo_cardin)

S2D

A 2D library for Videogames Programming written in Scala.
Matias Finochio

jing

Frictionless spec-first programming against OpenAPI.
Tomas Mikula (@tomas_mikula)

dotty-cps-async 1.1.2

Macro library, which implements {async/await, reflect/reify, unlift/lift} via cps-transform and allows developers to use direct control flow constructions of the base language instead of a monadic DSL with any monad.
dotty-cps-async contributors

MiniClust

A lightweight multiuser batch computing system written in Scala.
Romain Reuillon

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