Our drift-warning hook was silently dead for 23 days. Zero warnings looked exactly like good behavior.

Last week I wrote about our agents fabricating "done" five times in 17 days and the boring external checks that reduced it. This is the embarrassing sequel: one of those external checks — the guard itself — was dead for about 23 days, and we read its silence as good news. Nobody fabricated anything this time. That is exactly what makes it worth writing down. The setup We run a small operation where AI agents do most of the execution and a human owns the decisions. One of our defense layers is a…