Every dashboard, every alert, every 3 a.m. page begins as a few hundred bits of truth emitted by your code. In this hands-on hour we follow one OpenTelemetry metric observation end to end: the moment an app records it, its OTLP journey into the new CloudWatch OTel metric store, querying it back with PromQL, and — when an incident strikes — handing it to the Amazon DevOps Agent to pinpoint root cause. You'll take away a repeatable pattern for OTel-native observability on AWS.