From a bash status line to a Rust binary that spawns in 0.34 ms — and why ~99% of it didn't matter (opens in new tab)

Up front, to be fair: this article was written with Claude Code (AI) — as were the code, the benchmarks, and the charts. The voice is modeled on my own past, non-AI articles; the model followed a style guide reverse-engineered from them. My human writing: medium.com/@xorio42. Hi, It all started by accident. I stumbled on the /statusline command inside Claude Code one day and had no idea what it was about, so I went looking. I read the docs, and right there at the top is an example status line...