Creator of Flask • earendil.com ♥︎ writing and giving talks • Excited about AI • Husband and father of three • Inhabits Vienna; Liberal Spirit • “more nuanced in person” • More AI content on https://x.com/mitsuhiko
More stuff: https://ronacher.eu/
Armin Ronacher
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Some weekend thoughts of recent mob behaviors. lucumr.pocoo.org/2026/6/6/com...
I wrote this almost exactly one year ago: lucumr.pocoo.org/2025/6/4/cha...
From fear to optimism: why I am convinced AI is worth embracing.
On the strange hostility that grows in communities built around abstinence.
lucumr.pocoo.org
More musings after some people got upset about the word clanker. lucumr.pocoo.org/2026/5/26/cl...
Armin Ronacher
In case you are in the camp of “Andrew Tridgell is vibefucking rsync” please read this.l and adjust your priors. medium.com/@tridge60/rs...
Jarred rewrite Bun in Rust in a week with clankers. Say what you want about it, but that’s impressive. github.com/oven-sh/bun/...
I think @antirez ds4.c is important! I wrote down my thoughts on why I built pi-ds4 and why we need to focus our local model efforts stronger than we do currently. lucumr.pocoo.org/2026/5/8/loc...
Has been a while since I wrote about agentic engineering, so this time around some learnings of maintaining Pi as a junior maintainer to @mariozechner.at lucumr.pocoo.org/2026/5/24/pi...
Armin Ronacher
Sharing this post once more given recent news: “… it would be much more honest to just recognize that we did not quite move past the point of dividing immigration into the people we like, and the people we don’t like, and that tastes are subject to change.” dark.ronacher.eu/2025/12/30/i...
Why I like the word clanker and why machines are not people.
lucumr.pocoo.org
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…
Blog post with details coming soon. It passes Bun's pre-existing test suite on all platforms (and fixes several memory leaks and flaky tests), the binary size shrinks by 3 MB - 8 MB, the benchm...
