diff --git a/frontend/src/hooks/useFeatureFlag.ts b/frontend/src/hooks/useFeatureFlag.ts
new file mode 100644
index 00000000..fd96ed0a
--- /dev/null
+++ b/frontend/src/hooks/useFeatureFlag.ts
@@ -0,0 +1,9 @@
+import { useAuthStore } from '@/store/authStore'
+
+/**
+ * Check if a feature flag is enabled for the current user.
+ * Returns false for unknown keys (fail closed).
+ */
+export function useFeatureFlag(key: string): boolean {
+  return useAuthStore((s) => s.featureFlags[key] ?? false)
+}