Whenever a new technology shows up, the conversation quickly splits into camps. There are the people who reject it outright, and there are the people who seem to adopt it with religious enthusiasm. F

Today I’m very happy to share that Mario Zechner is joining Earendil. First things first: I think you should read Mario’s post. This is his news more than it is ours, and he tells his side of it bett

About five months ago I wrote about Absurd, a durable execution system we built for our own use at Earendil, sitting entirely on top of Postgres and Postgres alone. The pitch was simple: you don’t ne

Trees take quite a while to grow. If someone 50 years ago planted a row of oaks or a chestnut tree on your plot of land, you have something that no amount of money or effort can replicate. The only

Because code gets cheaper and cheaper to write, this includes re-implementations. I mentioned recently that I had an AI port one of my libraries to another language and it ended up choosing a differe

Historically, writing code was slower than reviewing code. It might not have felt that way, because code reviews sat in queues until someone got around to picking it up. But if you compare the actual

Last year I first started thinking about what the future of programming languages might look like now that agentic engineering is a growing thing. Initially I felt that the enormous corpus of pre-exis

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 th

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 thoug

AI coding agents are causing quality degradation in code contributions, with users seemingly unaware of the problem they're creating.

AI agent ported MiniJinja (Rust template engine) to Go in ~10 hours with minimal human guidance, requiring only 45 min of active work.

Claude AI autonomously solved Advent of Code 2025 puzzles using a web browser skill, working independently to read prompts and submit solutions.

The author reflects on 2025 as a transformative year, leaving Sentry to start a company and shifting from hands-on coding to AI-assisted programming.

Claude Code's "plan mode" conflicted with "YOLO mode" permissions, so the author developed an alternative iterative workflow using markdown files instead.