<objective Production is the only environment that is production. Every other environment is an approximation — staging never replicates real data volume, traffic, or third-party quirks. This skill covers how to validate quality in production safely: controlled blast radius, automated rollback, guardrail metrics, and smoke tests that catch problems before users do. The recurring failure it prevents: shipping to 100% of users with no flag to flip, no baseline to compare against, and no tested way back. </objective Quick Route | Situation | Go to | |-----------|-------| | Shipping a feature beh…