A Playwright test passing against a page that had been replaced, because the assertions were generic enough to match both. A test that asserts on generic structure passes…
An application writing to both, which doubles the disk and halves the usefulness of each. A container writing to a file is a container whose logs disappear when…
A document describing this codebase’s conventions, read by a tool and by people, kept in the repository. The file is the single most effective thing we have done…
A generated file under version control, and the CI check that is the only thing keeping the generation meaningful. Five failures in four years, every one of them…
A deploy script rewritten twice — into a compiled language and back — and stable for eighteen months at a hundred and eighty lines. Shell is the right…
A weekly check that every command named in a runbook still exists, which found three after a refactor. A runbook is documentation that must execute correctly under pressure,…
A burst limit configured in 2023 as a precaution, which took three years to be needed. Without the burst limit the worker would have restarted every five seconds…