An autonomous system of mine lost access to its execution environment and went into a crash loop. I read the logs, formed a theory, wrote a commit, deployed it. It came back up. I closed the incident and moved on. A few days later I checked it properly, because not taking a system's word for itself is the work I do — and that has to include when the system is mine. Here is what the check looked like. The claim: a code change restored the system's access to its execution environment. ...