Step 1: the Salty project, two modules, tests and the gym

Salty.uproject (UE 5.8) from the Third Person template with class redirects, the SaltyCore and Salty modules,
the three build targets, USaltyAssetManager calling InitGlobalData, Config/Tags with the 23 root namespaces,
Scripts/run-tests.sh, build.sh and Authoring/create_gym.py, L_Gym, Git LFS attributes and the placeholder test.
Template variants kept as reference (D-41). The four Fab packs stay out of the repository for now (~10 GB).
The editor serves the engine MCP plugin on 127.0.0.1:8000 through DefaultEditorPerProjectUserSettings.ini.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Source/Salty/Variant_SideScrolling/AI/SideScrollingNPC.h

@@ -0,0 +1,64 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Character.h"
+#include "SideScrollingInteractable.h"
+#include "SideScrollingNPC.generated.h"
+
+/**
+ *  Simple platforming NPC
+ *  Its behaviors will be dictated by a possessing AI Controller
+ *  It can be temporarily deactivated through Actor interactions
+ */
+UCLASS(abstract)
+class ASideScrollingNPC : public ACharacter, public ISideScrollingInteractable
+{
+	GENERATED_BODY()
+
+protected:
+
+	/** Horizontal impulse to apply to the NPC when it's interacted with */
+	UPROPERTY(EditAnywhere, Category="NPC", meta = (ClampMin = 0, ClampMax = 10000, Units="cm/s"))
+	float LaunchImpulse = 500.0f;
+
+	/** Vertical impulse to apply to the NPC when it's interacted with */
+	UPROPERTY(EditAnywhere, Category="NPC", meta = (ClampMin = 0, ClampMax = 10000, Units="cm/s"))
+	float LaunchVerticalImpulse = 500.0f;
+
+	/** Time that the NPC remains deactivated after being interacted with */
+	UPROPERTY(EditAnywhere, Category="NPC", meta = (ClampMin = 0, ClampMax = 10, Units="s"))
+	float DeactivationTime = 3.0f;
+
+public:
+
+	/** If true, this NPC is deactivated and will not be interacted with */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category="NPC")
+	bool bDeactivated = false;
+
+	/** Timer to reactivate the NPC */
+	FTimerHandle DeactivationTimer;
+
+public:
+
+	/** Constructor */
+	ASideScrollingNPC();
+
+public:
+
+	/** Cleanup */
+	virtual void EndPlay(EEndPlayReason::Type EndPlayReason) override;
+
+public:
+
+//	~begin IInteractable interface 
+
+	/** Performs an interaction triggered by another actor */
+	virtual void Interaction(AActor* Interactor) override;
+
+//	~end IInteractable interface
+
+	/** Reactivates the NPC */
+	void ResetDeactivation();
+};