Feature flag.
also: feature flags · feature toggle · feature toggles · kill switch · kill switchesA runtime switch that turns code paths on or off without a deploy, separating deployment from release.
the two-minute refresher
- Deploy with the feature OFF; turn it on when ready, for some users first.
- Uses: gradual rollout, A/B tests, kill switches, per-tenant features.
- A bad feature is turned off in seconds, no rollback needed.
- Remove old flags: stale flags are tech debt and hidden branches.