Feature flags are configuration mechanisms that allow software features to be enabled or disabled dynamically without redeploying code. They are widely used to control feature rollouts, perform testing, and manage experimental functionality.
Feature flags are implemented by wrapping feature logic in conditional checks that evaluate flag values. These values can be stored in configuration files, databases, or centralized management services. Administrators or developers toggle flags to control behavior in real time.
Flags enable gradual rollouts, allowing features to be exposed to specific user groups before full release. They also support rapid rollback if issues are detected. This reduces deployment risk and improves release confidence.
However, feature flags must be managed carefully. Forgotten or outdated flags increase code complexity and maintenance burden. Regular reviews are required to remove obsolete flags and maintain system clarity.
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