Testability Over Trust
Lesson Learned: In fast-moving environments, even experienced teams are tempted to rely on trust over test coverage. This story isn’t about blame—it’s about how a small, well-meaning change nearly caused large-scale downstream decisions to be made on false data. Testing removes doubt. Skipping it invites disaster. The first time I felt a system wobble—not crash, not alert, just wobble—it started with silence. No errors. No warnings. Just dashboards that “mostly looked right.” ...