From 46ea58423b2de6da19b0a236f086629de29b1549 Mon Sep 17 00:00:00 2001
From: jyelon <jyelon@gmail.com>
Date: Mon, 16 Mar 2026 04:56:25 -0400
Subject: [PATCH] Urgh

---
 Content/Testing/BP_VarTest2.uasset            |   4 +-
 .../Source/BlueprintMCP/BlueprintMCP.Build.cs |   3 +-
 .../Handlers/GraphNode_ShowMenu.h             | 104 ++++++++++++++++++
 .../BlueprintMCP/Private/BPVarEditor.cpp      |  12 +-
 4 files changed, 119 insertions(+), 4 deletions(-)
 create mode 100644 Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/GraphNode_ShowMenu.h

diff --git a/Content/Testing/BP_VarTest2.uasset b/Content/Testing/BP_VarTest2.uasset
index 09917adf..69c94f48 100644
--- a/Content/Testing/BP_VarTest2.uasset
+++ b/Content/Testing/BP_VarTest2.uasset
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:769d8a49cd6d6bce7daba5a3cabd0bf9bc39469c6534dfbda1ac1baecf3df261
-size 25017
+oid sha256:a426feb7372347c28c835a840f6b890468baa0a272ab022a7efefbb2ecc0d529
+size 49393
diff --git a/Plugins/BlueprintMCP/Source/BlueprintMCP/BlueprintMCP.Build.cs b/Plugins/BlueprintMCP/Source/BlueprintMCP/BlueprintMCP.Build.cs
index f8a62504..1712e577 100644
--- a/Plugins/BlueprintMCP/Source/BlueprintMCP/BlueprintMCP.Build.cs
+++ b/Plugins/BlueprintMCP/Source/BlueprintMCP/BlueprintMCP.Build.cs
@@ -31,7 +31,8 @@ public class BlueprintMCP : ModuleRules
 			"AnimGraphRuntime",
 			"RHI",
 			"Slate",
-			"SlateCore"
+			"SlateCore",
+			"ToolMenus"
 		});
 	}
 }
diff --git a/Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/GraphNode_ShowMenu.h b/Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/GraphNode_ShowMenu.h
new file mode 100644
index 00000000..709a4a12
--- /dev/null
+++ b/Plugins/BlueprintMCP/Source/BlueprintMCP/Handlers/GraphNode_ShowMenu.h
@@ -0,0 +1,104 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "MCPHandler.h"
+#include "MCPFetcher.h"
+#include "MCPUtils.h"
+#include "MCPServer.h"
+#include "EdGraph/EdGraphNode.h"
+#include "EdGraph/EdGraphSchema.h"
+#include "ToolMenus.h"
+#include "GraphNode_ShowMenu.generated.h"
+
+
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+// ---------------------------------------------------------------------------
+
+UCLASS()
+class UMCP_GraphNode_ShowMenu : public UObject, public IMCPHandler
+{
+	GENERATED_BODY()
+
+public:
+	UPROPERTY(meta=(Description="Target node"))
+	FString Node;
+
+	virtual FString GetDescription() const override
+	{
+		return TEXT("Show context menu actions available for a node and its pins.");
+	}
+
+	virtual void Handle() override
+	{
+		MCPFetcher F;
+		UEdGraphNode* FoundNode = F.Walk(Node).Cast<UEdGraphNode>();
+		if (!FoundNode) return;
+
+		UEdGraph* Graph = FoundNode->GetGraph();
+		if (!Graph) return;
+
+		const UEdGraphSchema* Schema = Graph->GetSchema();
+		if (!Schema) return;
+
+		// Print actions for the node itself (no pin).
+		PrintActions(FoundNode, Graph, Schema, nullptr);
+
+		// Print actions for each pin.
+		for (UEdGraphPin* Pin : FoundNode->Pins)
+		{
+			PrintActions(FoundNode, Graph, Schema, Pin);
+		}
+	}
+
+private:
+
+	void PrintMenu(UToolMenu* Menu, const TCHAR* Header)
+	{
+		bool bAnyEntries = false;
+		for (const FToolMenuSection& Section : Menu->Sections)
+		{
+			for (const FToolMenuEntry& Entry : Section.Blocks)
+			{
+				FText Label = Entry.Label.Get();
+				if (Label.IsEmpty())
+					continue;
+
+				// Check if this is a command-based entry or a direct action.
+				TSharedPtr<const FUICommandList> OutCommandList;
+				bool bIsCommand = (Entry.GetActionForCommand(FToolMenuContext(), OutCommandList) != nullptr)
+					|| OutCommandList.IsValid();
+
+				if (!bAnyEntries)
+					UMCPServer::Printf(TEXT("  %s:\n"), Header);
+				if (bIsCommand)
+					UMCPServer::Printf(TEXT("    %s (command)\n"), *Label.ToString());
+				else
+					UMCPServer::Printf(TEXT("    %s\n"), *Label.ToString());
+				bAnyEntries = true;
+			}
+		}
+	}
+
+	void PrintActions(UEdGraphNode* FoundNode, UEdGraph* Graph, const UEdGraphSchema* Schema, const UEdGraphPin* Pin)
+	{
+		UGraphNodeContextMenuContext* Context = NewObject<UGraphNodeContextMenuContext>();
+		Context->Init(Graph, FoundNode, Pin, false);
+
+		// Print header.
+		if (Pin)
+			UMCPServer::Printf(TEXT("\nPin: %s\n"), *MCPUtils::FormatName(Pin));
+		else
+			UMCPServer::Printf(TEXT("Node: %s\n"), *MCPUtils::FormatName(FoundNode));
+
+		// Gather and print node-level actions.
+		UToolMenu* NodeMenu = NewObject<UToolMenu>();
+		FoundNode->GetNodeContextMenuActions(NodeMenu, Context);
+		PrintMenu(NodeMenu, TEXT("Node Actions"));
+
+		// Gather and print schema-level actions.
+		UToolMenu* SchemaMenu = NewObject<UToolMenu>();
+		Schema->GetContextMenuActions(SchemaMenu, Context);
+		PrintMenu(SchemaMenu, TEXT("Schema Actions"));
+	}
+};
diff --git a/Plugins/BlueprintMCP/Source/BlueprintMCP/Private/BPVarEditor.cpp b/Plugins/BlueprintMCP/Source/BlueprintMCP/Private/BPVarEditor.cpp
index 50edf71f..76ef8ac6 100644
--- a/Plugins/BlueprintMCP/Source/BlueprintMCP/Private/BPVarEditor.cpp
+++ b/Plugins/BlueprintMCP/Source/BlueprintMCP/Private/BPVarEditor.cpp
@@ -43,8 +43,18 @@ void FBPVarEditor::Dump()
 
 bool FBPVarEditor::ApplyJson(const FJsonObject* Json)
 {
-	LoadFlags();
 	bool bHasDefault = Json->HasField(TEXT("DefaultValue"));
+	bool bHasType = Json->HasField(TEXT("VarType"));
+	if (bHasDefault && bHasType)
+	{
+		UMCPServer::Print(TEXT(
+			"ERROR: Cannot set VarType and DefaultValue in the same call.\n"
+			"Change the type first, then recompile the blueprint,\n"
+			"then set the default.\n"));
+		return false;
+	}
+
+	LoadFlags();
 
 	TArray<MCPProperty> Props = MergedProperties();
 	if (!MCPJson::PopulateFromJson(Props, Json, true))