Armin Ronacher
@mitsuhiko.at
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/
More stuff: https://ronacher.eu/
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Armin Ronacher
@mitsuhiko.at
· Nov 27
Entries tagged
lucumr.pocoo.org
If you're skeptical or frustrated with AI, and still poking around on this profile, you might find my longform content more informative: lucumr.pocoo.org/tags/ai/ or my Youtube channel which has some conversations with others too: www.youtube.com/@ArminRonach...
This weekend I was thinking about programming languages. Programming languages for agents. Will we see them? I believe people will (and should!) try to build some. lucumr.pocoo.org/2026/2/9/a-l...
A Language For Agents
What programming languages would agents want to program in?
lucumr.pocoo.org
February 9, 2026 at 9:45 AM
This weekend I was thinking about programming languages. Programming languages for agents. Will we see them? I believe people will (and should!) try to build some. lucumr.pocoo.org/2026/2/9/a-l...
This Tweet is making the rounds: "Nearly every ambitious person I know who has dived into AI is working harder than ever, and longer hours than ever.
Fascinating dynamic tbh.
I have NEVER worked this hard, nor had this much fun with work."
I'm in this Tweet.
Fascinating dynamic tbh.
I have NEVER worked this hard, nor had this much fun with work."
I'm in this Tweet.
February 7, 2026 at 10:14 PM
This Tweet is making the rounds: "Nearly every ambitious person I know who has dived into AI is working harder than ever, and longer hours than ever.
Fascinating dynamic tbh.
I have NEVER worked this hard, nor had this much fun with work."
I'm in this Tweet.
Fascinating dynamic tbh.
I have NEVER worked this hard, nor had this much fun with work."
I'm in this Tweet.
If you wanna critique our Gondolin sandbox approach, I wrote some docs for the security architecture and networking stack: earendil-works.github.io/gondolin/sec... earendil-works.github.io/gondolin/net... Would love to get feedback!
Gondolin Security Design - Gondolin
earendil-works.github.io
February 7, 2026 at 3:10 PM
If you wanna critique our Gondolin sandbox approach, I wrote some docs for the security architecture and networking stack: earendil-works.github.io/gondolin/sec... earendil-works.github.io/gondolin/net... Would love to get feedback!
An agent now builds a 200.000 lines of code C compiler from scratch that can compile the Linux kernel. In two weeks. I think at this point it's hard to argue against the tremendous productivity gains that this technology has created for my industry.
February 5, 2026 at 7:33 PM
An agent now builds a 200.000 lines of code C compiler from scratch that can compile the Linux kernel. In two weeks. I think at this point it's hard to argue against the tremendous productivity gains that this technology has created for my industry.
The future is software writing its own software. Which is why I'm so in love with Pi: a coding agent that can extend itself :) lucumr.pocoo.org/2026/1/31/pi/
Pi: The Minimal Agent Within OpenClaw
A gentle introduction to the Pi coding agent and why I think it’s a glimpse into the future of software.
lucumr.pocoo.org
January 31, 2026 at 2:23 PM
The future is software writing its own software. Which is why I'm so in love with Pi: a coding agent that can extend itself :) lucumr.pocoo.org/2026/1/31/pi/
Marp and slidev is nice, but agents are better at HTML and react and all that stuff. But then you need to rebuild the presenter view. So I build a reusable presenter view that works with (almost) any agent generated slide deck (incl. cloudflare funnel to remote control)
January 28, 2026 at 10:27 AM
Marp and slidev is nice, but agents are better at HTML and react and all that stuff. But then you need to rebuild the presenter view. So I build a reusable presenter view that works with (almost) any agent generated slide deck (incl. cloudflare funnel to remote control)
Some small personal update: The who and why behind Earendil, the company I started with Colin Hanna. lucumr.pocoo.org/2026/1/27/ea...
Colin and Earendil
Introducing Earendil and my cofounder to the curious minds.
lucumr.pocoo.org
January 27, 2026 at 3:23 PM
Some small personal update: The who and why behind Earendil, the company I started with Colin Hanna. lucumr.pocoo.org/2026/1/27/ea...
MiniJinja is now available with Go. It's all Codex and Opus built, but it passes the Rust tests and comes with docs and examples. github.com/mitsuhiko/mi...
github.com
January 26, 2026 at 11:10 PM
MiniJinja is now available with Go. It's all Codex and Opus built, but it passes the Rust tests and comes with docs and examples. github.com/mitsuhiko/mi...
I'm sure we're all building beads now. I recorded a short demo of my shitty todos extension for Pi. It's modeled after Claude Code's task system with some neat UI integration. It's mostly for single-agent use, but it does support claiming of tasks. youtu.be/uPR7aAneg2U
Short Demo of my Pi Todo Extension
YouTube video by Armin Ronacher
youtu.be
January 25, 2026 at 7:25 PM
I'm sure we're all building beads now. I recorded a short demo of my shitty todos extension for Pi. It's modeled after Claude Code's task system with some neat UI integration. It's mostly for single-agent use, but it does support claiming of tasks. youtu.be/uPR7aAneg2U
Weekend thoughts on Gas Town, Beads, slop AI browsers, and AI-generated PRs flooding overwhelmed maintainers. I don't think we're ready for our new powers we're wielding. lucumr.pocoo.org/2026/1/18/ag...
Agent Psychosis: Are We Going Insane?
What’s going on with the AI builder community right now?
lucumr.pocoo.org
January 18, 2026 at 10:38 AM
Weekend thoughts on Gas Town, Beads, slop AI browsers, and AI-generated PRs flooding overwhelmed maintainers. I don't think we're ready for our new powers we're wielding. lucumr.pocoo.org/2026/1/18/ag...
Ukraine now has not a single power plant that was not hit by missiles, most of them not operational right now. Kiev currently is -13 °C. People are freezing for days, pipes are bursting. And we got so used to the news of the war, that it's not even a front page story any more.
January 16, 2026 at 3:17 PM
Ukraine now has not a single power plant that was not hit by missiles, most of them not operational right now. Kiev currently is -13 °C. People are freezing for days, pipes are bursting. And we got so used to the news of the war, that it's not even a front page story any more.
I don't think the situation in Ukraine has been this dire since the beginning of the war, and there is little to believe that this will improve. All the messaging around this issue right now is really, really bad.
January 15, 2026 at 1:07 PM
I don't think the situation in Ukraine has been this dire since the beginning of the war, and there is little to believe that this will improve. All the messaging around this issue right now is really, really bad.
I summarized my thoughts of my MiniJinja porting experience if you're curious. There is also a video linked in there with a narrated coding session sped up. lucumr.pocoo.org/2026/1/14/mi...
Porting MiniJinja to Go With an Agent
Agents can now port code bases much better than before.
lucumr.pocoo.org
January 14, 2026 at 8:43 AM
I summarized my thoughts of my MiniJinja porting experience if you're curious. There is also a video linked in there with a narrated coding session sped up. lucumr.pocoo.org/2026/1/14/mi...
If a country bombs another country’s infrastructure back 50 years, and there is no sign of this ending, … at one point I wonder what the cost of surrender is. The news out of Ukraine are absolutely horrible.
January 13, 2026 at 6:33 PM
If a country bombs another country’s infrastructure back 50 years, and there is no sign of this ending, … at one point I wonder what the cost of surrender is. The news out of Ukraine are absolutely horrible.
Reposted by Armin Ronacher
January 13, 2026 at 12:44 PM
I feel like at this point nobody is surprised any more than an agent can port an entire code base, that took me months to write, to a new programming language, with all tests passing and adjusted APIs. We have come quite far already. bsky.app/profile/mits...
Three hours, 2.2 million tokens later with mostly passive prompting hours in the evening, and some overnight "continue" prompts and minijinja is fully ported to go. I linked the single pi session that has all prompts in it. shittycodingagent.ai/session/?29f...
January 13, 2026 at 12:12 PM
I feel like at this point nobody is surprised any more than an agent can port an entire code base, that took me months to write, to a new programming language, with all tests passing and adjusted APIs. We have come quite far already. bsky.app/profile/mits...
Three hours, 2.2 million tokens later with mostly passive prompting hours in the evening, and some overnight "continue" prompts and minijinja is fully ported to go. I linked the single pi session that has all prompts in it. shittycodingagent.ai/session/?29f...
January 13, 2026 at 8:11 AM
Three hours, 2.2 million tokens later with mostly passive prompting hours in the evening, and some overnight "continue" prompts and minijinja is fully ported to go. I linked the single pi session that has all prompts in it. shittycodingagent.ai/session/?29f...
Reposted by Armin Ronacher
I'm on my first flight for the year and found time to play with some of these AI coding tools, and I gotta say, this shit has come a long way.
The interactive nature of the tool I'm using makes me feel like I'm in control. I'm reviewing artifacts and approving them before the agent moves on.
The interactive nature of the tool I'm using makes me feel like I'm in control. I'm reviewing artifacts and approving them before the agent moves on.
January 12, 2026 at 11:19 AM
I'm on my first flight for the year and found time to play with some of these AI coding tools, and I gotta say, this shit has come a long way.
The interactive nature of the tool I'm using makes me feel like I'm in control. I'm reviewing artifacts and approving them before the agent moves on.
The interactive nature of the tool I'm using makes me feel like I'm in control. I'm reviewing artifacts and approving them before the agent moves on.
The future is unevenly distributed.
January 12, 2026 at 9:21 AM
The future is unevenly distributed.
I really want to know now. How much code do you still write yourself?
January 11, 2026 at 8:17 PM
I really want to know now. How much code do you still write yourself?
Reposted by Armin Ronacher
January 11, 2026 at 10:19 AM
Weekend musings on having and deserving and the role of billionaires in the US right now. There is no point, just contemplation. dark.ronacher.eu/2026/1/11/i-...
I Have Thus I Deserve
When starting conditions are ignored and success is seen as earned.
dark.ronacher.eu
January 11, 2026 at 9:23 AM
Weekend musings on having and deserving and the role of billionaires in the US right now. There is no point, just contemplation. dark.ronacher.eu/2026/1/11/i-...
Some of you were asking how I use pi, so here is me demoing how I built a little tank computer game over Christmas with pi and Opus without looking at the code. youtu.be/ANQ1IYsFM2s
Building a Computer Game from Scratch With Opus and PI
YouTube video by Armin Ronacher
youtu.be
January 8, 2026 at 6:02 PM
Some of you were asking how I use pi, so here is me demoing how I built a little tank computer game over Christmas with pi and Opus without looking at the code. youtu.be/ANQ1IYsFM2s
Kinda mind boggling. Opus got my little game running in web assembly in 10 minutes. Didn't even have to fix up inputs or sound which is wild to me. mitsuhiko.github.io/tankgame/
Tank Game
mitsuhiko.github.io
January 5, 2026 at 11:16 PM
Kinda mind boggling. Opus got my little game running in web assembly in 10 minutes. Didn't even have to fix up inputs or sound which is wild to me. mitsuhiko.github.io/tankgame/