Ue Actor Component Architecture

This one covers the Actor-Component model in Unreal Engine, from constructor vs BeginPlay timing to spawning and attachment rules. It walks through the lifecycle events (PostInitializeComponents, EndPlay reasons), when to use UActorComponent versus USceneComponent versus UPrimitiveComponent, and how CreateDefaultSubobject differs from NewObject at runtime. The network replication notes are solid if you're debugging why properties aren't ready in BeginPlay on clients. Good reference if you're tired of guessing whether to call SetupAttachment or AttachToComponent, or if you keep hitting null world pointers in constructors. The lifecycle table and component type breakdown save you from digging through engine docs every time.

skills.sh installs: 1.4K
GitHub stars: 446
last updated: Aug 21, 2026

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$ npx -y skills add quodsoler/unreal-engine-skills --skill ue-actor-component-architecture --agent claude-code

Installs into .claude/skills of the current project.

Files

UE Actor-Component Architecture

Target engine: UE 5.8. APIs below are verified against the 5.8 headers; older forms are listed under "Deprecated — do not use".

Build actors out of components: lifecycle hooks in the right order, spawning (immediate, deferred, pooled), component creation and attachment, ticking, and C++ interfaces. Everything here is in the Engine module (GameFramework/Actor.h, Components/ActorComponent.h, Components/SceneComponent.h, Engine/World.h) on top of CoreUObject; a game module's Build.cs needs "Core", "CoreUObject", "Engine".