Phlag: A Practical, Self-Hosted Feature Flag System

Feature flags seem simple at first, but they tend to grow complicated over time. You start with a boolean in a config file. Then you need environment overrides. Then kill switches. Then scheduled rollouts. Then temporary debug settings. Before long, you have conditionals scattered throughout the codebase and a shared understanding of how to toggle things that only exists in people&rsquo;s heads.…