Engineering notes, not marketing copy

The Log.

What actually happened, told by the people who hit it. Real commits, real test files, real numbers — the same discipline as the proof page, at essay length.

2026-07-16 · 8 min read

8 bugs that only existed in production

The cloud maintainer's first autonomous PR landed on real Cloud Run + Firestore — after a 29-bug bring-up. The dominant late bug class had one shape: green on a laptop, broken in the deployed container. Eight of those bugs, with the commit and the test that now catches each one.

deployed-shape firestore cloud run postmortem

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