Feature Flags measures the team's ability to toggle functionality on or off in production without requiring a new deployment. This capability enables safer releases through progressive rollouts, instant rollbacks, and A/B testing without code changes. Mature feature flag practices decouple deployment from release, giving teams fine-grained control over what users experience and when.
Decoupling deploy from release. Enables instant rollback and safe experimentation.
MORE CRITICAL: Feature flags become essential in monorepos for trunk-based development. Google uses flags extensively to merge incomplete work safely. Without them, long-lived branches in monorepos cause merge nightmares.
Feature flag management complexity grows with team count. Essential for trunk-based development at scale. Flag debt accumulates without governance.
Toggle off vs full pipeline re-run.
Deploy ≠ release enables continuous deployment.
Progressive rollouts catch issues at small blast radius.