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Fixing a 20-year-old bug in Enlightenment E16
Some may find it weird, but I actually greatly enjoy using Enlightenment E16 as my window manager. It's themable, hackable, lightweight (24MB peak RSS!),...
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Odin, Wikipedia and engagement farming
Imagine one day you wake up, you drink your morning glass of milk, brush your teeth, sit on your computer, stare your own diffuse image on the display, while reflecting on your own gingerness. You turn on the nerd machine while doing the daily "no updates" Windows pray. The computer is finally on, and what is that…
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FOSDEM 2026 – Open-Source Conference in Brussels – Day#1 Recap
FOSDEM 2026 in Brussels highlights open source, European digital sovereignty, BSD, Linux, community innovation, and free software.
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Why I forked httpx
I forked the python library httpx to httpxyz after over a year without a release of this popular package
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GitHub and the crime against software
An investigation into collapse of Github and how the decay of our tech infrastructure is a crime against software. Detailed comparisons of Github, Gitlab, Codeberg, and more from a distributed systems and software performance expert.
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Preparing for KDE Plasma's Last X11-Supported Release
When we first announced the transition to Plasma Wayland, one of Martin's slides from stated, "It's done when it's done!"
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My first patch to the Linux kernel
How an undefined behavior in C made me pull my hair out for days but became my first patch to the Linux kernel!
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Why Drawing Tablet Brands Won't Collaborate on Linux Floss Drivers
As you probably already know, I regularly get in contact with drawing tablet brands for reviews on my Youtube channel . I usually agree to do detailed video test of their models (see my hardware tag) but only at two condition: test the tablet on GNU/Linux, and only use Free/Libre and Open Source software for the test…
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Dumb ways for an open source project to die
How your dependencies became Bernies
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Lean now ships with verified kernels
Leonardo de Moura — Creator of Lean and Z3
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Going Full Time on Open Source
Why I left Figma to work full-time on open source, and how I plan to make the work sustainable.
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Nobody pays for FOSS, we can force them to
Thirty years of voluntary funding schemes haven't paid open source maintainers because asking doesn't scale. The real money already flows — to JFrog, Docker, Sonatype — at the registry layer. The fix: registries charge companies for supply (they already do), then route a slice automatically to the maintainers who make…
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Building Pi with Pi
Learnings from post-AI Open Source and how we’re approaching this so far.
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Open source does not imply open community
Open source software has existed long before the invention of the (D)VCS. The author likely hosted a barebones HTML webpage or a txt file describing the project. There definitely was an FTP server somewhere with tarballs. The author may have been reachable by email. If you were really lucky …
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The Cathedral, the Bazaar, and the Winchester Mystery House
The internet made coordination cheap and gave us the Bazaar. Coding agents make code cheap and are giving us sprawling, idiosyncratic software.
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Dependency cooldowns turn you into a free-rider
Against dependency cooldowns as a response to supply chain attacks
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Rsync and outrage
I gave up blogging a long time ago (apart from an occasional thing about ArduPilot), I tend to just write code and hope people find it…
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How to attract AI bots to your open source project
A practical guide to getting the engagement your project deserves.
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Reverse-engineering Viktor and making it open source
Software engineer, Warsaw.
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KDE onboarding is good now
And my history with KDE
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The Cathedral, the Megachurch, and the Bazaar
If you’re of a certain age, you probably remember the essay The Cathedral and the Bazaar. The TL;DR was that old open source was the cathedral of exclusive developers and groups. Then the Bazaar showed up (which was the Linux Kernel for example) and that freed us from the shackles of the cathedral. Except if we look…
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Science Is Open Software
TL;DR I claim that modern science is synonymous with open source software. This post explains why, why it matters, and what you can (and should) do next. Why do you care about (open source) software? - Everyone I spend a lot of my time working on software. I have been asked why software matters more times than I can…
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Postmortem for Kernel Soundness Bug #14576
Leonardo de Moura — Creator of Lean and Z3
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I imported the full Linux kernel git history into pgit
I imported the entire Linux kernel git history into pgit's PostgreSQL-backed storage. 1,428,882 commits, 24.4 million file versions, 20 years of development. Here's what the kernel looks like when you can just ask.
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Open-source AI and open models reading list
How to get up to speed on open models and their implications.