feat: publish HoloLake model-native living system source

product-source/hololake-platform/src/hooks/useFeatureFlag.ts

@@ -0,0 +1,22 @@
+/**
+ * Feature flag hook backed by PostHog + release channels.
+ *
+ * Flags are resolved in order:
+ *   1. localStorage override (`ff_<name>`) — for dev/QA testing
+ *   2. PostHog feature flags (evaluated by release channel)
+ *   3. Alpha channel always returns true (sees all features)
+ */
+
+import { isFeatureEnabled } from '../lib/telemetry'
+
+export type FeatureFlagName = 'example_flag'
+
+export function useFeatureFlag(flag: FeatureFlagName): boolean {
+  try {
+    const override = localStorage.getItem(`ff_${flag}`)
+    if (override !== null) return override === 'true'
+  } catch {
+    // localStorage may be unavailable in some contexts
+  }
+  return isFeatureEnabled(flag)
+}