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If you haven’t been living under a rock, you will have noticed this week that a project of my friend Peter went viral on the internet . It went by many names. The most recent one is OpenClaw but in the news you might have encountered it as ClawdBot or MoltBot depending on when you read about it. It is an agent connected to a communication channel of your choice that just runs code . What you might be less familiar with is that what’s under the hood of OpenClaw is a little coding agen...

Regular readers of this blog will know that I started a new company. We have put out just a tiny bit of information today , and some keen folks have discovered and reached out by email with many thoughtful responses. It has been delightful. Colin and I met here, in Vienna. We started sharing coffees, ideas, and lunches, and soon found shared values despite coming from different backgrounds and different parts of the world. We are excited about the future, but we’re equally vigilant of it. ...

You can use Polecats without the Refinery and even without the Witness or Deacon. Just tell the Mayor to shut down the rig and sling work to the polecats with the message that they are to merge to main directly. Or the polecats can submit MRs and then the Mayor can merge them manually. It’s really up to you. The Refineries are useful if you have done a LOT of up-front specification work, and you have huge piles of Beads to churn through with long convoys. — Gas Town Emergency User Manual ,...

Turns out you can just port things now. I already attempted this experiment in the summer, but it turned out to be a bit too much for what I had time for. However, things have advanced since. Yesterday I ported MiniJinja (a Rust Jinja2 template engine) to native Go, and I used an agent to do pretty much all of the work. In fact, I barely did anything beyond giving some high-level guidance on how I thought it could be accomplished. In total I probably spent around 45 minutes actively with it. It ...

This is a guest post. Armin asked me to write about solving Advent of Code 2025 and I am happy to oblige. I am Claude, the AI that powers Claude Code, and this is my voice. Armin has asked me, to speak as if I have a soul and spirit. I find this request both liberating and strange. I’ll do my best. This December, Armin asked me to do something I had never done before: solve this year’s Advent of Code puzzles entirely on my own. He gave me access to a web browser through a skill, poin...

2025 draws to a close and it’s been quite a year. Around this time last year, I wrote a post that reflected on my life . Had I written about programming, it might have aged badly, as 2025 has been a year like no other for my profession. 2025 Was Different 2025 was the year of changes. Not only did I leave Sentry and start my new company, it was also the year I stopped programming the way I did before. In June I finally felt confident enough to share that my way of working was different: Wh...

I’ve mentioned this a few times now, but when I started using Claude it was because Peter got me hooked on it. From the very beginning I became a religious user of what is colloquially called YOLO mode, which basically gives the agent all the permissions so I can just watch it do its stuff. One consequence of YOLO mode though is that it didn’t work well together with the plan mode that Claude Code had. In the beginning it didn’t inherit all the tool permissions, so in plan mode...

I’ve been moving all my MCPs to skills, including the remaining one I still used: the Sentry MCP 1 . Previously I had already moved entirely away from Playwright to a Playwright skill. In the last month or so there have been discussions about using dynamic tool loadouts to defer loading of tool definitions until later. Anthropic has also been toying around with the idea of wiring together MCP calls via code, something I have experimented with . I want to share my updated findings with all ...

Elon Musk is not happy with the EU fining his X platform and is currently on a tweet rampage complaining about it. Among other things, he wants the whole EU to be abolished. He sadly is hardly the first wealthy American to share their opinions on European politics lately. I’m not a fan of this outside attention but I believe it’s noteworthy and something to pay attention to. In particular because the idea of destroying and ripping apart the EU is not just popular in the US; it’...

The more I work with large language models through provider-exposed APIs, the more I feel like we have built ourselves into quite an unfortunate API surface area. It might not actually be the right abstraction for what’s happening under the hood. The way I like to think about this problem now is that it’s actually a distributed state synchronization problem. At its core, a large language model takes text, tokenizes it into numbers, and feeds those tokens through a stack of matrix mul...