Library › Book 6 › Feature Flags -- Decoupling Deployment from Release
Feature Flags -- Decoupling Deployment from Release
3.1🔒The Core IdeaFeature flags decouple deployment from release. You deploy code to production but control who sees it. This turns every deployment into a…
3.2🔒Feature Flag Platforms- LaunchDarkly for enterprise teams needing the most mature targeting and experimentation capabilities. - Unleash for teams wanting…
3.3🔒Feature Flag Testing Strategy: Quality-Gated RolloutsThe most powerful pattern for QA engineers is the quality-gated rollout. Instead of a binary "on or off," you roll out a feature…
3.4🔒Progressive Rollout PlanA disciplined rollout progresses through gates, each with specific quality signals:
3.5🔒Testing Feature Flag BehaviorFeature flags themselves need testing. A misconfigured flag can cause partial outages or inconsistent user experiences.
3.6🔒Feature Flag Hygiene
3.7🔒Monitoring Feature Flag ImpactEvery feature flag should have associated metrics:
3.8🔒Career Translation- Implemented quality-gated progressive rollouts using feature flags (LaunchDarkly/Flagsmith), reducing user-facing defect exposure by 85%…
3.9🔒Q&AInterview Depth CheckPrompt: You are rolling out a new AI-powered search algorithm behind a feature flag. After 3 days of internal dogfood, error rates look…