diff --git a/Source/Framework/Public/Core/GM_CoreGameMode.h b/Source/Framework/Public/Core/GM_CoreGameMode.h
index d1f04e8..a87b92d 100644
--- a/Source/Framework/Public/Core/GM_CoreGameMode.h
+++ b/Source/Framework/Public/Core/GM_CoreGameMode.h
@@ -14,8 +14,6 @@
 // Forward declarations
 class UGI_GameFramework;
 class AGS_CoreGameState;
-class APC_CoreController;
-class APS_CorePlayerState;
 
 // Delegates
 DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnChapterTransition, FGameplayTag, NewChapter);
@@ -29,6 +27,10 @@ DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnGameOverTriggered, FGameplayTag,
  * death routing, and coordinates with the narrative system for story progression.
  *
  * Server-authoritative. Extends AGameModeBase for replication support.
+ *
+ * Note: PlayerControllerClass, PlayerStateClass, and GameStateClass are
+ * inherited from AGameModeBase — do not redeclare (UHT forbids shadowing).
+ * Set them in your BP child's Class Defaults.
  */
 UCLASS()
 class FRAMEWORK_API AGM_CoreGameMode : public AGameModeBase
@@ -38,19 +40,6 @@ class FRAMEWORK_API AGM_CoreGameMode : public AGameModeBase
 public:
 	AGM_CoreGameMode();
 
-	// ========================================================================
-	// Default Classes (Set in Blueprint or Config)
-	// ========================================================================
-
-	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Framework|Classes")
-	TSubclassOf<APC_CoreController> PlayerControllerClass;
-
-	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Framework|Classes")
-	TSubclassOf<APS_CorePlayerState> PlayerStateClass;
-
-	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = "Framework|Classes")
-	TSubclassOf<AGS_CoreGameState> GameStateClass;
-
 	// ========================================================================
 	// Chapter Management
 	// ========================================================================
diff --git a/Source/Framework/Public/Core/I_InterfaceLibrary.h b/Source/Framework/Public/Core/I_InterfaceLibrary.h
index de73d58..20a6cc8 100644
--- a/Source/Framework/Public/Core/I_InterfaceLibrary.h
+++ b/Source/Framework/Public/Core/I_InterfaceLibrary.h
@@ -20,7 +20,7 @@ class UDA_InteractionData;
 // I_Interactable — World objects the player can interact with
 // ============================================================================
 
-UINTERFACE(MinimalAPI, BlueprintType, meta = (CannotImplementInterfaceInBlueprint))
+UINTERFACE(MinimalAPI, BlueprintType)
 class UInteractable : public UInterface
 {
 	GENERATED_BODY()
diff --git a/docs/developer/cpp-integration-guide.md b/docs/developer/cpp-integration-guide.md
index f146278..f234ac9 100644
--- a/docs/developer/cpp-integration-guide.md
+++ b/docs/developer/cpp-integration-guide.md
@@ -176,9 +176,10 @@ When ready for the full GameInstance:
 ### Blueprint Child Setup
 1. Create Blueprint Class → Parent: `GM_CoreGameMode`
 2. Name: `BP_CoreGameMode`
-3. In Class Defaults:
-   - `GameState Class` → your `BP_CoreGameState`
-   - `PlayerController Class` → your `BP_CorePlayerController`
+3. In Class Defaults (Class Defaults → Classes section, inherited from `AGameModeBase`):
+   - `Player Controller Class` → your `PC_CoreController` BP child
+   - `Player State Class` → your `PS_CorePlayerState` BP child
+   - `Game State Class` → your `BP_CoreGameState`
    - `Default Pawn Class` → your player pawn
    - `HUD Class` → your `WBP_HUDController`