Production deployment checklist

A rollback plan that's never been executed is a guess, not a plan — the moment you actually need it is a production incident, which is the worst possible time to discover a migration doesn't reverse cleanly or a script has a missing permission. Testing the rollback in staging (or a dry run against a copy of production data) turns an emergency procedure into a known, timed operation before you ever need to rely on it under pressure.

Staging verification is only useful if the environment is a reasonably close match to production — same database migrations applied in the same order, similar data volume, and the actual feature flags you plan to ship with. A staging pass against stale data or with flags in a different state than production gives false confidence; the goal is for the staging deploy to be a rehearsal of the exact steps you'll run in production, not just "the code compiles and the happy path works."

Even routine deploys occasionally cause a brief blip — a slow page load, a momentary 500, a UI change users notice — and if support doesn't know a deploy just happened, they have no fast way to correlate an incoming ticket with the cause. A quick heads-up before the window means support can say "we just shipped a change, let me check" instead of escalating a false alarm or leaving a customer without an answer.