flag-prune

Remove PostHog feature flags

Remove stale PostHog feature flags from web and React code with flag-prune. See PostHog’s official feature flag documentation.

Web isFeatureEnabled

if (posthog.isFeatureEnabled("advanced-metrics")) {
  showAdvancedMetrics()
} else {
  showBasicMetrics()
}

Preview, then write after reviewing the diff:

npx flag-prune --set 'posthog.isFeatureEnabled("advanced-metrics")=true' src
npx flag-prune --set 'posthog.isFeatureEnabled("advanced-metrics")=true' --write src

React variant hook

const variant = useFeatureFlagVariantKey("paywall-variant")
return variant === "soft" ? <SoftPaywall /> : <HardPaywall />

Preview the final string variant:

npx flag-prune --set 'useFeatureFlagVariantKey("paywall-variant")=soft' src

For boolean React flags, use the same pattern with useFeatureFlagEnabled("flag-key").

APIs such as getFeatureFlagResult() return an object. Do not replace the complete result with a primitive. Use a primitive-returning API, or refactor the object access first.

See all provider guides and the detailed call matching rules.

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