Exciting news! Our very own Alejandro Gómez Londoño will be leading a tutorial at #BazelCon on debugging build errors. Curious how to approach and fix failing builds effectively? Don’t miss this hands-on training session! Register today: https://t.co/Wtt2kHnDoM

I got this bunny to rotate in the browser. In Haskell! By compiling to WASM and interfacing with pixi.js! The new WASM backend lets us do *A LOT* of cool things. Exciting times!

Software doesn't have to get slower as it grows. In our latest blog post, Mesut Gunes dives into continuous performance testing—an approach to catching slowdowns and regressions before they impact your users. Learn how performance checks can fit into your CI/CD pipeline

The Topiary team is proud to announce the release of Topiary 0.7.0 "Heavenly Hemlock"; no headline change, but a lot of small solid improvements. With thanks to our contributors and welcoming our first non-Tweag team member, Mikhail Katychev

#BazelCon is just weeks away! 🙌 Be sure to catch Guillaume Maudoux’s talk on how we tackled rules_python’s Gazelle extension challenges with FawltyDeps to automate Python dependency maintenance in Bazel. 🐍✨ Register now: https://t.co/c3XxRFdwH6

New blog post by Wesley Fuchter. Tried “vibe coding”? Here’s why it fails at scale. Our team at Modus Create ran an experiment—traditional vs #AI-assisted dev squads. The AI team shipped clean code faster using a structured workflow we call #AgenticCoding. Dive in:

#BazelCon is just weeks away! Be sure to catch our Software Engineer Daniel Thagard for a live talk where he'll showcase his open-source Bazel ruleset that transforms Bazel into a multimedia powerhouse. 🎥🎶 Learn more & register: https://t.co/U2mIJjpEA5

Join Andreas Herrmann for a live talk at #BazelCon on the challenges that we faced while creating rules_haskell to build Haskell with Bazel, and how Buck2’s novel features allowed us to create more efficient Haskell build rules for Buck2. 💪 Learn more: https://t.co/t618Q3RS0K

#Nickel v1.14 has just been released. It features improved contract error messages when importing Yaml files, and various improvements to the LSP. The latter being mostly contributed by L0r3m1p5um. Thanks to them and new contributors Brandon Weeks and Twitchyliquid64. Full

Going to #BazelCon 2025? Catch Build Systems Engineer Malte Poll's talks on revolutionizing build performance! He'll cover: 1️⃣ "rules_img": A redesign for container image building 2️⃣ "asset-fuse": Bringing large files in Buck2 & Bazel Learn more 👇 https://t.co/TRuESJqw9H

Yann Hamdaoui just published the second part of his #Topiary tutorial, teaching you how to build a language formatter from scratch. Dive right in and learn how to handle and customize single-line and multi-line layouts.

Thanks to everyone for stopping by our booth at PyData Paris! We enjoyed connecting with so many people passionate about data science, machine learning, and open source innovation. We hope to see you again soon! #PyDataParis

Code decays. How do you save a 1989 video game or digital-native art? Conservator Nika Maltar explains her strategy for integrating community-driven FOSS preservation tools (like #SWHAP) into a museum workflow.

Arnaud Spiwack will be presenting "Destination calculus: A linear λ-calculus for purely functional memory writes", joint work with Thomas Bagrel, at OOPSLA on Saturday 18th

Mathieu Boespflug will be presenting a functional pearl "Invertible Syntax without the Tuples", joint work with Arnaud Spiwack, at Olivier Danvy's Festschrift on the Tuesday 14th.

ICFP and SPLASH are around the corner, starting on the 12th October in Singapore. This year we're coming with two presentations (thread).

A bit of casual, yet pleasant news. As of a week ago or so, #Nickel files are now syntax highlighted on Github. Many thanks to contributor extraordinaire Mikhail Katychev, who made the PR to Github's Linguist https://t.co/UYHUFzBbgd

There was a performance bug in recent Ormolu. The fix is terrifying

PyData Paris 2025 is only one week away! Join us for a live talk on October 1 to hear about how the CodeCommons collaboration makes training AI models on code more transparent, sustainable, and fair. 💡 Get your tickets today: https://t.co/GaceGoDm0G #PyDataParis

Alexey Tereshenkov wrote a second blog post on dependency graphs. In this one, he breaks down the issues that you might need to deal with when managing the dependencies of a project at scale. Read to understand the sort of problems build systems engineers face.