After a deploy, the hard part is often not the deploy. CI has already passed. The rollout has started. Dashboards mostly look normal. Then one small runtime signal moves, and someone has to decide whether it came from this deploy or whether it is just noise. That window is short. Usually the first 15 minutes. But it shows up every time a team ships, and the more I worked around it, the less it felt like a normal monitoring problem. The decision is not "is the system healthy" When I first started, I assumed this was a subset of observability. The signals are runtime signals. The dashboards are the same dashboards. The Sentry events are the same Sentry events. But the decision is different. Monitoring is mostly about ongoing system state. Is the service up. Are the latencies in range. Are the error rates trending. The decisions monitoring drives are continuous: alert on threshold breach, page on saturation, dashboards for capacity planning. The post-deploy decision is much narrower.…