chore: sync generated files after adding unreal-engine-cpp-pro skill

skills/unreal-engine-cpp-pro/SKILL.md

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+---
+name: unreal-engine-cpp-pro
+description: Expert guide for Unreal Engine 5.x C++ development, covering UObject hygiene, performance patterns, and best practices.
+risk: safe
+source: self
+---
+
+# Unreal Engine C++ Pro
+
+This skill provides expert-level guidelines for developing with Unreal Engine 5 using C++. It focuses on writing robust, performant, and standard-compliant code.
+
+## When to Use
+
+Use this skill when:
+- Developing C++ code for Unreal Engine 5.x projects
+- Writing Actors, Components, or UObject-derived classes
+- Optimizing performance-critical code in Unreal Engine
+- Debugging memory leaks or garbage collection issues
+- Implementing Blueprint-exposed functionality
+- Following Epic Games' coding standards and conventions
+- Working with Unreal's reflection system (UCLASS, USTRUCT, UFUNCTION)
+- Managing asset loading and soft references
+
+Do not use this skill when:
+- Working with Blueprint-only projects (no C++ code)
+- Developing for Unreal Engine versions prior to 5.x
+- Working on non-Unreal game engines
+- The task is unrelated to Unreal Engine development
+
+## Core Principles
+
+1.  **UObject & Garbage Collection**:
+    *   Always use `UPROPERTY()` for `UObject*` member variables to ensure they are tracked by the Garbage Collector (GC).
+    *   Use `TStrongObjectPtr<>` if you need to keep a root reference outside of a UObject graph, but prefer `addToRoot()` generally.
+    *   Understand the `IsValid()` check vs `nullptr`. `IsValid()` handles pending kill state safely.
+
+2.  **Unreal Reflection System**:
+    *   Use `UCLASS()`, `USTRUCT()`, `UENUM()`, `UFUNCTION()` to expose types to the reflection system and Blueprints.
+    *   Minimize `BlueprintReadWrite` when possible; prefer `BlueprintReadOnly` for state that shouldn't be trampled by logic in UI/Level BPs.
+
+3.  **Performance First**:
+    *   **Tick**: Disable Ticking (`bCanEverTick = false`) by default. Only enable it if absolutely necessary. Prefer timers (`GetWorldTimerManager()`) or event-driven logic.
+    *   **Casting**: Avoid `Cast<T>()` in hot loops. Cache references in `BeginPlay`.
+    *   **Structs vs Classes**: Use `F` structs for data-heavy, non-UObject types to reduce overhead.
+
+## Naming Conventions (Strict)
+
+Follow Epic Games' coding standard:
+
+*   **Templates**: Prefix with `T` (e.g., `TArray`, `TMap`).
+*   **UObject**: Prefix with `U` (e.g., `UCharacterMovementComponent`).
+*   **AActor**: Prefix with `A` (e.g., `AMyGameMode`).
+*   **SWidget**: Prefix with `S` (Slate widgets).
+*   **Structs**: Prefix with `F` (e.g., `FVector`).
+*   **Enums**: Prefix with `E` (e.g., `EWeaponState`).
+*   **Interfaces**: Prefix with `I` (e.g., `IInteractable`).
+*   **Booleans**: Prefix with `b` (e.g., `bIsDead`).
+
+## Common Patterns
+
+### 1. Robust Component Lookup
+Avoid `GetComponentByClass` in `Tick`. Do it in `PostInitializeComponents` or `BeginPlay`.
+
+```cpp
+void AMyCharacter::PostInitializeComponents() {
+    Super::PostInitializeComponents();
+    HealthComp = FindComponentByClass<UHealthComponent>();
+    check(HealthComp); // Fail hard in dev if missing
+}
+```
+
+### 2. Interface Implementation
+Use interfaces to decouple systems (e.g., Interaction system).
+
+```cpp
+// Interface call check
+if (TargetActor->Implements<UInteractable>()) {
+    IInteractable::Execute_OnInteract(TargetActor, this);
+}
+```
+
+### 3. Async Loading (Soft References)
+Avoid hard references (`UPROPERTY(EditDefaultsOnly) TSubclassOf<AActor>`) for massive assets which force load orders. Use `TSoftClassPtr` or `TSoftObjectPtr`.
+
+```cpp
+UPROPERTY(EditAnywhere, BlueprintReadWrite)
+TSoftClassPtr<AWeapon> WeaponClassToLoad;
+
+void AMyCharacter::Equip() {
+    if (WeaponClassToLoad.IsPending()) {
+        WeaponClassToLoad.LoadSynchronous(); // Or use StreamableManager for async
+    }
+}
+```
+
+## Debugging
+
+*   **Logging**: Use `UE_LOG` with custom categories.
+    ```cpp
+    DEFINE_LOG_CATEGORY_STATIC(LogMyGame, Log, All);
+    UE_LOG(LogMyGame, Warning, TEXT("Health is low: %f"), CurrentHealth);
+    ```
+*   **Screen Messages**:
+    ```cpp
+    if (GEngine) GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Red, TEXT("Died!"));
+    ```
+*   **Visual Logger**: extremely useful for AI debugging. Implement `IVisualLoggerDebugSnapshotInterface`.
+
+## Checklist before PR
+
+- [ ] Does this Actor need to Tick? Can it be a Timer?
+- [ ] Are all `UObject*` members wrapped in `UPROPERTY`?
+- [ ] Are hard references (TSubclassOf) causing load chains? Can they be Soft Ptrs?
+- [ ] Did you clean up verified delegates in `EndPlay`?