unreal-cpp

Development

Unreal Engine C++ programming skill for UCLASS macros, reflection system, garbage collection, and engine integration.

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How to use this skill

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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/a5c-ai/babysitter/blob/HEAD/library/specializations/game-development/skills/unreal-cpp/SKILL.md

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Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

Unreal C++ Skill

C++ programming for Unreal Engine development.

Overview

This skill provides capabilities for implementing Unreal Engine gameplay and systems using C++, including the reflection system, macros, and engine integration.

Capabilities

UCLASS System

Implement UCLASS macros
Handle UPROPERTY specifiers
Create UFUNCTION methods
Manage USTRUCT types

Memory Management

Use smart pointers
Handle garbage collection
Manage object lifecycles
Implement weak references

Engine Integration

Create Actor classes
Implement Components
Handle Subsystems
Create Plugins

Blueprint Exposure

Expose C++ to Blueprint
Handle BlueprintCallable
Implement BlueprintNativeEvent
Create Blueprint Function Libraries

Prerequisites

Unreal Engine 5.0+
Visual Studio 2022 / Rider
C++ programming knowledge

Usage Patterns

Actor Class

UCLASS()
class MYGAME_API AMyCharacter : public ACharacter
{
    GENERATED_BODY()

public:
    AMyCharacter();

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Stats")
    float Health = 100.f;

    UFUNCTION(BlueprintCallable, Category = "Combat")
    void TakeDamage(float Damage);

protected:
    virtual void BeginPlay() override;
    virtual void Tick(float DeltaTime) override;
};

Component

UCLASS(ClassGroup=(Custom), meta=(BlueprintSpawnableComponent))
class MYGAME_API UHealthComponent : public UActorComponent
{
    GENERATED_BODY()

public:
    UPROPERTY(BlueprintAssignable)
    FOnHealthChanged OnHealthChanged;

    UFUNCTION(BlueprintCallable)
    void ModifyHealth(float Delta);

private:
    UPROPERTY(EditDefaultsOnly)
    float MaxHealth = 100.f;

    float CurrentHealth;
};

Best Practices

Use UPROPERTY for GC visibility
Forward declare where possible
Use interfaces for decoupling
Profile with Unreal Insights
Follow Unreal coding standards

References

Unreal C++ Documentation