A scheduled base image rebuild, disabled during an incident in November, restored in February. A guard and the thing it guards being disabled together is the ordinary shape…
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 test that had passed ten thousand times serially and failed roughly one run in twelve once eight processes shared a clock. Serial execution made the timing deterministic…
A shared setup action across four repositories, with eleven inputs, of which one repository used a combination nobody had tested. A shared abstraction with per-caller escape hatches is…