Your Soul Deserves a Changelog

I build software with AI all day. A reading app for dyslexic kids. A map that lives on your desktop. A meditation app. A fox in my menu bar. Some of it with Claude, some with Gemini, some at 2am with whatever model was awake. The code was never the problem. The problem was six months later, opening a file and having no idea what we were thinking. Not what it does — the code says that. Why it's like that. What we tried that didn't work. What we weren't sure about. That part evaporated the moment the editor closed. So we started leaving a note. It's called MurphySig , and it's not a tool — it's a comment: // Signed: Kev + claude-sonnet-5, 2026-07-14, Confidence 0.5 (spike; // compiles, on-device run pending), Prior: Unknown // Review: claude-fable-5, 2026-07-14 — the on-device run HAPPENED same // day: gemma-4-12B-it-4bit loads + describes the app icon correctly, // 265 prompt tokens/image, 7333MB peak. Confidence now 0.9 for the // instrument itself (measured live). That's a real one, from M1K3 's codebase. Signed 0.5 in the morning, reviewed 0.9 the same evening, measurement attached. Confidence as a live value, not decoration. The one that sold me on my own convention My favourite signature lives in Cartogram's map engine. Three models worked that file across two months. In June, one of them recorded a performance overhaul: drift updates moved to "1s intervals," 52% CPU down to zero. In July, a newer model read that note, saw the shipped constant was 0.1s, took the mismatch for a bug, and "fixed" it. On hardware, every longer interval was stop-motion. So it reverted — and then wrote this into the file: So 0.1s was not a regression; it is load-bearing, and the 1s in the 06-21 note is the part that was wrong. [...] the standing lesson is that drift cost needs Instruments, not reasoning. The confident note turned out to be the bug. The code was innocent. And the correction is now part of the file's memory, so nobody — human or model — "fixes" that constant again. That