Operations | Monitoring | ITSM | DevOps | Cloud

When I ask an AI agent to change code, I also want it to run the application and test what it changed. Asking it to write some tests is a start. But if it invents the expected responses from the same assumptions it used to write the code, those tests can miss the same mistake. Traffic replay gives the agent something concrete to test against: requests and responses captured from a working application.

I don't remember the last time I actually searched for something. Not in the way I used to, anyway. There was a time when having a question meant opening a search engine, typing a few words, staring at a page full of links, opening three or four of them, reading contradictory answers, deciding which one sounded believable, and eventually coming to a conclusion of my own.

Running 24/7 on-call coverage with a small team is first of all an arithmetic problem, and most teams avoid doing the arithmetic because the answer is uncomfortable. There are 168 hours in a week. Your engineers work roughly 40 of them. Somebody has to be reachable for the other 128, and if you have four engineers, that somebody is each of them, one week in four, thirteen weeks a year.

Cron job monitoring is the part of observability most teams skip until a backup turns out to have stopped running three weeks ago. A web server that falls over generates errors, trips a threshold and pages someone inside a minute. A nightly job that quietly stops running generates nothing at all. There is no error rate to alert on, no latency spike, no failed health check. There is only an absence, and absence is invisible to almost every monitoring setup by default.

Most teams building an on-call rotation template in Google Calendar get the first two steps right and the third one wrong. Creating a shared calendar is easy. Inviting the team is easy. Expressing "four people, one week each, forever, handing off Monday morning" as a set of recurring events is where it falls apart, usually into a mess of one off entries that someone has to rebuild by hand every quarter.