This was a lot of work but I'm so happy we could make it happen as a community. Huge thanks to the steering council and everyone that participated in the discussion!

📦 Masterclass: Reproducible Dependency Management with Pixi Bridge pip + conda in a reproducible, declarative workflow. Hands-on session with Dr. Mike Müller. 📅 April 17 🎟️ Limited spots 2026.pycon.de/masterclasse...

Hello, world! We are starting a worker cooperative to build, maintain, teach, and support open source scientific imaging software. image.coop/blog/posts/2...

After more than 10 years, Jazzband is sunsetting. I started it in 2015 because maintaining Open Source alone was exhausting. The idea was simple: shared access, shared responsibility. It's been an honor to watch it grow. jazzband.co/news/2026/03... (1/3)

Hi folks, I'm trying to put together a list of AI generated contribution policies for different open source projects. Do you have any you can link to me here? You can also directly submit a PR to https://github.com/melissawm/open-source-ai-contribution-policies

First time I hear Gogo Penguin outside my place. This lovely café I usually go to for brunch/coworking keeps getting better 😍

Question scoped to software in physics: Do you currently use PPC64LE architecture hardware for anything in your scientific workflow and is it important to you to have binary builds of software for that machine? Are there high impact examples that you can think of? Or is everything x64 or aarch64?

New blog post! A close look at Tahoe menu icons https://tonsky.me/blog/tahoe-icons/

Congratulations to our friends at Anaconda for shipping CEP-16 (sharded repodata). If you use conda-forge from anaconda.org servers, pixi & rattler-build got magically a lot faster! conda.org/blog/sharde...

Anaconda.org and conda adopt sharded repodata! 🚀 CEP 16, introduced by @prefix.dev, splits the massive repodata files into per-project shards. This allows clients to only fetch what they need, resulting in significant speedups! Instructions to opt-in and benchmarks at buff.ly/XUSXp9h

For Python package management I use a mixture of pixi, uv and conda depending on the task I'm doing. I wrote up a long form post about the history of these tools, why each one exists, and why I settled on these choices in my workflow. jacobtomlinson.dev/posts/2025/p...

Conda ≠ PyPI Conda isn’t just another Python package manager-it’s a multi-language, user-space distribution system. In this 3-part series, we explore the fundamental differences between conda and PyPI. Part 1 is live now 👇 conda.org/blog/conda-i... #conda #packaging #python

We are hiring! @quansight.com is looking for a Senior Engineer for Python/C/C++ Packaging 📦. If you have dabbled with @python.org wheels, @conda.org packages, and the like, get in touch! You can apply at job-boards.greenhouse.io/quansight/jo...

TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-... 🧵

napari 0.6.6 is out! 🚀 This is a bugfix release following up 0.6.5: if something in your napari workflow unexplicably broke, you might want to update ;) Also, with the new bundle you can now "open files with > napari"! Check out the full release notes on the website: napari.org/stable/relea...

I have submitted by first draft PEP! 📦 PEP 804 complements PEP 725 ([external] dependency metadata) with a mapping mechanism to translate ecosystem-agnostic identifiers to your favourite package manager. More info: - PEP 725: discuss.python.org/t/103890 - PEP 804: discuss.python.org/t/103891

🏗️ Infrastructure wins that matter: Isuru Fernando's breakdown of ABI3 conda support shows how "boring" backend improvements create massive downstream value. Faster Python adoption, happier maintainers, lower costs - win-win-win! Read the detailed post: buff.ly/J09DnBq

TIL you can configure VS Code's Python debugger to ask for CLI arguments on every execution. The key option is: ``` "configurations": [ ..., "args": "${command:pickArgs}" ] ``` More details: code.visualstudio.com/docs/python/...

🙌 We’re excited to have @matthewfeickert.com, John Kirkham, and Ruben Arts teaching us "Reproducible Machine Learning Workflows for Scientists with pixi" at #SciPy2025! 🔥 Learn how to create fast and reproducible ML environments using pixi, the next-gen package manager for scientific workflows.

Celebrating 4 incredible years with ‪@rjai.me‬! 🌟 As a conda steering committee member and conda-forge core team member, Jaime helps coordinate efforts that enable scientific breakthroughs. Here's to more years of community-driven innovation! 🙌 #CommunityImpact #OpenSource

We recently celebrated 10 years of @condaforge on our Zulip. I'd love to hear your story if you are involved with conda-forge. The project has grown to over 30'000 packages, and still grows at a crazy rate.

This transition to a Public Benefit Corporation is a huge milestone for us ✨. I am so excited about the future and the impact we will continue to have on the open source ecosystem.

The first year of free-threaded Python A recap of the first year of work on enabling support for the free-threaded build of CPython in community packages. https://labs.quansight.org/blog/free-threaded-one-year-recap

Just published: "The first year of free-threaded Python" – Learn how our team at Quansight Labs helped enable GIL-free Python in major packages! Read the blog: labs.quansight.org/blog/free-th.... Join Nathan Goldbaum & Lysandros Nikolaou at #PyConUS on May 16th to hear more about this work!

Thanks to months of consistent contributions by lysnikolaou of @quansight.com (Lysandros Nikolaou), all of the mandatory dependencies of #aiohttp now ship free-threaded variants of #wheels! This unlocks the same in aiohttp! Find a minute to thank him, will you? #aio-libs #Python #Packaging

PEP 770 has been approved! 🥳 Now you can add SBOMs to describe bundled dependencies of Python packages discuss.python.org/t/pep-770-im...

🎉 Happy 10th Anniversary, @conda-forge.org‬ 🎂 From humble beginnings to 1 BILLION monthly downloads, you've revolutionized how we share and distribute scientific software. Read about the incredible journey and impact here: buff.ly/vEg4mUH #CondaForge #OpenSource

Today we celebrate the 10th anniversary of conda-forge! Our beloved Github organization was created around this time on Apr 11th, 2015. More details: - Blog post: conda-forge.org/blog/2025/04... - Zulip thread: conda-forge.zulipchat.com#narrow/chann...

Introducing: ✨ Labs Open Source Fund ✨ An annual small fund to support key volunteer-driven OSS projects and communities, nominated and selected entirely by Quansight Labs members. This year, we're glad to sponsor $15,000, equally shared among CodeMirror, Mkdocstrings, and Maturin 💛

Want a concise daily digest of issue and pull request activity from your GitHub repos? Try Dinghy: pypi.org/project/ding...

I've added a couple features to conda-metadata-app.streamlit.app. 1️⃣ If you check "Show dependencies as rich table" you'll get hyperlinked package names with separate columns for version and build strings. 2️⃣ The "Download artifact" link now reports the total size of the package.

It's here at last! 🎉 We're excited to present Quansight Labs' 2024 Annual Report, showcasing our advancements, community involvement, and commitment to sustainability in open source. We're eager for a bright future ahead. 🔮 Read the full report: buff.ly/NfQ0hUx

I FINALLY asked for pronouncement on PEP 751 -- lock files for #Python : peps.python.org/pep-0751/ .

I wrote a new blog post about using `conda` without any kind of shell modifications. Just the Python entry point directly. No ~/.bashrc or Windows registry edits! Simply one more entry in PATH. rjai.me/posts/2025-0...

TIL you can add <a href="...">URLs</a> to Github Projects text fields and they will be rendered in the item tab nicely! I'm using this to link to items without an associated issue, without having to click on the item description. Pretty neat! (Sadly you can't use <img src="..." />)

We're happy to announce the support for the new (v1) recipe format on conda-forge: conda-forge.org/blog/2025/02... It was a long journey from coming up with a new, community approved spec to the first v1 recipe on conda-forge 🎉 – more details in the blog post.

We're excited to introduce R-Lite, a #WebAssembly distribution of #R for the browser, allowing you to use the R kernel in JupyterLite! Read the article by Isabel Paredes, who spearheaded this project at QuantStack, on the @jupyter.org blog: blog.jupyter.org/r-in-the-bro...

We are excited for Smera Goel's talk at #PyConDE #PyData2025! She'll show how small accessibility tweaks in documentation can make a huge difference, using the PyData Sphinx Theme as a case study. https://buff.ly/4ifjtbr #a11y 📚♿

when I worked for the government this was actually a serious problem: we had over a million files that could only be opened on windows 98, scattered randomly across 50 million weather records from the last couple hundred years

🌐 One team's packaging quest changed multiple open source projects. @rjai.me 's recent #QuansightLabs post shows how technical collaboration can create unexpected innovations. https://buff.ly/3WXZoOA #OpenSource

Remember when a bunch of folks freaked out when Github added underlines to all their hyperlinks? Nope, I hadn't thought about that a single second til today. Everyone's happier now, and no one lost a single eyeball with this change.

Joint efforts with QuantStack!

🚀 Our mission matters now more than ever. Here's to 2024 🚀 🎓 180+ people trained 💡 55 new software submissions 🤝 278 diverse contributors And a single way to create a #python package! We’re lowering barriers to #opensource software. Join us! 🔗 Got 6 minutes? Read more: https://buff.ly/4aRffo0

Amazing new #Python #PEP to improve optional dependencies handling: https://peps.python.org/pep-0771/ The PEP is very thorough and well-written, and it perfectly uses @napari#python#peps a motivating example. We were not involved but we fully endorse it! 😃

The PyPy project now has an account here, please everyone go follow it so we can stop using Twitter: @pypyproject.bsky.social

🚀 From Linux to Windows, from MinGW to MSVC - follow the journey of implementing libsf_error_state in SciPy. A journey to the complexity behind scientific computing tools. https://buff.ly/413L6P7

I've seen a lot of Python folks getting super excited about `uv run --with ....` and I get it now. In @conda.org world, you can do the same with @prefix.dev Pixi! A colleague wanted me to debug something with PyArrow on my system and all I had to do was: ``` $ pixi exec -s pyarrow python ``` 🤯

Did you know that... 'conda' is actually an acronym? Cross Operating system Native Distribution Artifact. I know, I know, mind blown, cannot unsee it.

I wrote a blog post talking about the ripple effects @napari.fosstodon.org.ap.brid.gy had on the @conda.org ecosystem in the last three years. Check it out! labs.quansight.org/blog/napari-...