Using Feature Flags Safely in Production

Feature flags let a team deploy code to production while keeping a new feature hidden until it is ready, and roll it back instantly if something goes wrong without a redeploy.

The main risk is flag debt: old flags left in the codebase long after a feature has fully launched, which adds confusing branching logic over time.

We set an expiry review on every flag we introduce, so cleanup becomes a routine habit rather than a forgotten task.