Featured · Security
You turned off write access. It wrote anyway.
You denied the write tool, denied edit, denied apply_patch - and the files changed anyway.
Notes from the work
Blog
Software engineering, web development, and the decisions behind what we build.
Featured · Trading
Every trading indicator is the same three lines of maths
MACD, EMA, SMA and the opening range break get sold as four different ideas.
Featured · AI Systems
You wrote ten thousand tokens. You paid for a hundred and five thousand.
Your AI API bill is not set by the price of a token.
Software Engineering
Why the index made it slower
So the planner figured it'd touch about forty rows, picked the index, and then walked four and a half million.
Distributed Systems
Texas has 474 gigawatts of demand it does not believe in
Texas stopped approving data centre grid connections in August 2026 - not because the grid is full, but because nobody can tell which of the 474 gigawatts of requests are real.
Trading
Why 6R can be a worse trade than 2R
A reward-to-risk ratio of 6 ratio 1 sounds better than 2 ratio 1.
Trading
A model that refuses to write text, and what that buys a trading desk
Jev is TypeSafe's flagship model, and the first thing worth knowing about it is what it refuses to do: it is not trained to generate text.
Security
Someone opened a GitHub issue. 4,000 machines installed software nobody approved.
No stolen password.
Software Engineering
How big should your connection pool actually be?
Your app is slow, your database CPU is idle, and every request is hanging.
AI Systems
Self-hosting your LLM probably costs more
Self-hosting an open model is supposed to be the cheap option.