Kismet nodes now have their own module to themselves, so Unreal Engine can compile a shipping build correctly.

Source/ComboInputNodes/Public/ComboInputNodes.h

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+// ©2023 Batty Bovine Productions, LLC. All Rights Reserved.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Modules/ModuleInterface.h"
+
+
+class FComboInputNodesModule : public IModuleInterface
+{
+public:
+
+	/**
+	 * Singleton-like access to this module's interface.  This is just for convenience!
+	 * Beware of calling this during the shutdown phase, though.  Your module might have been unloaded already.
+	 *
+	 * @return Returns singleton instance, loading the module on demand if needed
+	 */
+	static FComboInputNodesModule &Get()
+	{
+		return FModuleManager::LoadModuleChecked<FComboInputNodesModule>("ComboInputNodes");
+	}
+
+	/**
+	 * Checks to see if this module is loaded and ready.  It is only valid to call Get() if IsAvailable() returns true.
+	 *
+	 * @return True if the module is loaded and ready to use
+	 */
+	static bool IsAvailable()
+	{
+		return FModuleManager::Get().IsModuleLoaded("ComboInputNodes");
+	}
+	
+	/** IModuleInterface implementation */
+	virtual void StartupModule() override;
+	virtual void ShutdownModule() override;
+};

Source/ComboInputNodes/Public/K2Node_ComboAction.h

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+// ©2023 Batty Bovine Productions, LLC. All Rights Reserved.
+
+#pragma once
+
+#include "K2Node.h"
+#include "K2Node_EventNodeInterface.h"
+#include "EdGraph/EdGraphNodeUtils.h"
+
+#include "K2Node_ComboAction.generated.h"
+
+
+class UInputAction;
+enum class ETriggerEvent : uint8;
+namespace ENodeTitleType { enum Type : int; }
+struct FBlueprintNodeSignature;
+
+class FBlueprintActionDatabaseRegistrar;
+class FKismetCompilerContext;
+
+
+UCLASS()
+class COMBOINPUTNODES_API UK2Node_ComboAction : public UK2Node, public IK2Node_EventNodeInterface
+{
+	GENERATED_BODY()
+
+public:
+	UK2Node_ComboAction(const FObjectInitializer &ObjectInitializer) : Super(ObjectInitializer){}
+
+	UPROPERTY()	TObjectPtr<const class UComboAction> ComboAction;
+
+	//~ Begin UEdGraphNode Interface.
+	virtual void AllocateDefaultPins() override;
+	virtual FLinearColor GetNodeTitleColor() const override;
+	virtual FText GetNodeTitle(ENodeTitleType::Type TitleType) const override;
+	virtual FText GetTooltipText() const override;
+	virtual FSlateIcon GetIconAndTint(FLinearColor &OutColor) const override;
+	virtual bool IsCompatibleWithGraph(UEdGraph const *Graph) const override;
+	virtual UObject* GetJumpTargetForDoubleClick() const override;
+	virtual void JumpToDefinition() const override;
+	//~ End UEdGraphNode Interface.
+
+	//~ Begin UK2Node Interface
+	virtual void ValidateNodeDuringCompilation(class FCompilerResultsLog &MessageLog) const override;
+	virtual bool ShouldShowNodeProperties() const override { return true; }
+	virtual void ExpandNode(FKismetCompilerContext &CompilerContext, UEdGraph *SourceGraph) override;
+	virtual void GetMenuActions(FBlueprintActionDatabaseRegistrar &ActionRegistrar) const override;
+	virtual FText GetMenuCategory() const override;
+	virtual bool CanUserEditPinAdvancedViewFlag() const override { return true; }
+	virtual FBlueprintNodeSignature GetSignature() const override;
+	//~ End UK2Node Interface
+
+	//~ Begin IK2Node_EventNodeInterface Interface.
+	virtual TSharedPtr<FEdGraphSchemaAction> GetEventNodeAction(const FText &ActionCategory) override;
+	//~ End IK2Node_EventNodeInterface Interface.
+
+private:
+	FName GetActionName() const;
+	
+	/** Constructing FText strings can be costly, so we cache the node's title/tooltip */
+	FNodeTextCache CachedTooltip;
+	FNodeTextCache CachedNodeTitle;
+};