diff --git a/src/bitdrift_public/protobuf/state/v1/scope.proto b/src/bitdrift_public/protobuf/state/v1/scope.proto
index c589eda..fbb42de 100644
--- a/src/bitdrift_public/protobuf/state/v1/scope.proto
+++ b/src/bitdrift_public/protobuf/state/v1/scope.proto
@@ -13,4 +13,7 @@ enum StateScope {
   UNSPECIFIED = 0;
   FEATURE_FLAG = 1;
   GLOBAL_STATE = 2;
+
+  // Used for internal state management, not driven by user-facing APIs.
+  SYSTEM = 3;
 }