Code to make Blueprint_Reparent safer.

Plugins/UEWingman/Source/UEWingman/Handlers/Blueprint_Reparent.h

@@ -44,6 +44,14 @@ public:
 		UClass* NewParentClassObj = UWingTypes::TextToOneObjectType(Parent);
 		if (!NewParentClassObj) return;
 
+		// Validate reparent
+		if (!WingUtils::CanReparentBlueprint(BP->GeneratedClass, NewParentClassObj))
+		{
+			UWingServer::Printf(TEXT("Error: Cannot reparent %s to %s — incompatible class hierarchy.\n"),
+				*WingUtils::FormatName(BP), *WingUtils::FormatName(NewParentClassObj));
+			return;
+		}
+
 		// Perform reparent
 		BP->ParentClass = NewParentClassObj;
 		FBlueprintEditorUtils::RefreshAllNodes(BP);

Plugins/UEWingman/Source/UEWingman/Private/WingUtils.cpp

@@ -22,6 +22,11 @@
 #include "Misc/Paths.h"
 #include "Misc/PackageName.h"
 
+// Reparent validation
+#include "Engine/LevelScriptActor.h"
+#include "Animation/AnimInstance.h"
+#include "Blueprint/UserWidget.h"
+
 // Animation Blueprint support
 #include "AnimStateNode.h"
 #include "AnimStateTransitionNode.h"
@@ -397,6 +402,47 @@ bool WingUtils::CheckCanRename(UEdGraphNode* Node, const FString &Name)
 	return true;
 }
 
+// ============================================================
+// Reparent validation
+// ============================================================
+
+bool WingUtils::CanReparentBlueprint(UClass* CurrentGenerated, UClass* Proposed)
+{
+	if (!CurrentGenerated || !Proposed) return false;
+
+	UClass* CurrentParent = CurrentGenerated->GetSuperClass();
+	if (!CurrentParent) return false;
+
+	// Don't allow parenting to itself or one of its children
+	if (Proposed->IsChildOf(CurrentGenerated)) return false;
+
+	// Don't allow parenting to an interface
+	if (Proposed->IsChildOf(UInterface::StaticClass())) return false;
+
+	// LevelScriptActor blueprints stay in the LevelScriptActor hierarchy
+	if (CurrentParent->IsChildOf(ALevelScriptActor::StaticClass()))
+		return Proposed->IsChildOf(ALevelScriptActor::StaticClass());
+
+	// Actor blueprints stay in the Actor hierarchy, but not LevelScriptActor
+	if (CurrentParent->IsChildOf(AActor::StaticClass()))
+		return Proposed->IsChildOf(AActor::StaticClass()) &&
+			!Proposed->IsChildOf(ALevelScriptActor::StaticClass());
+
+	// Component blueprints stay in the ActorComponent hierarchy
+	if (CurrentParent->IsChildOf(UActorComponent::StaticClass()))
+		return Proposed->IsChildOf(UActorComponent::StaticClass());
+
+	// Anim blueprints stay in the AnimInstance hierarchy
+	if (CurrentParent->IsChildOf(UAnimInstance::StaticClass()))
+		return Proposed->IsChildOf(UAnimInstance::StaticClass());
+
+	// Widget blueprints stay in the UserWidget hierarchy
+	if (CurrentParent->IsChildOf(UUserWidget::StaticClass()))
+		return Proposed->IsChildOf(UUserWidget::StaticClass());
+
+	return false;
+}
+
 // ============================================================
 // Blueprint helpers
 // ============================================================

Plugins/UEWingman/Source/UEWingman/Public/WingUtils.h

@@ -255,6 +255,9 @@ public:
 	static FString GetHandlerGroup(UClass* HandlerClass);
 	static void PrintHandlerHelp(UClass* HandlerClass);
 
+	// ----- Reparent validation -----
+	static bool CanReparentBlueprint(UClass* CurrentGenerated, UClass* Proposed);
+
 	// ----- Common Error Reporting -----
 	static bool CheckExactlyOneNamed(int Count, const TCHAR *Kind, const FString &Name);
 	static bool CheckExactlyNoneNamed(int Count, const TCHAR *Kind, const FString &Name);

Plugins/UEWingman/Source/UEWingman/UEWingman.Build.cs

@@ -32,7 +32,8 @@ public class UEWingman : ModuleRules
 			"RHI",
 			"Slate",
 			"SlateCore",
-			"ToolMenus"
+			"ToolMenus",
+			"UMG"
 		});
 	}
 }