UE Blueprint / C++ Interop

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

This skill covers the boundary between native code and the Blueprint VM: which UFUNCTION/UPROPERTY specifiers and meta= keys produce which node shapes, function libraries, latent and async nodes, Blueprint-implementable interfaces, and how C++ calls back into a Blueprint graph. Everything here lives in Core, CoreUObject and Engine (PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine" });); Project Settings pages also need DeveloperSettings. The authority for every specifier is Runtime/CoreUObject/Public/UObject/ObjectMacros.h — anything not declared in its UC, UI, UF, UP, US or UM enumerations is not a specifier.

Context

Read .agents/ue-project-context.md if it exists (module names, conventions, enabled plugins, GAS/networking setup). Do not stop if it is missing.

Identify the area from the request and the codebase. Ask only when two plausible readings would produce different code.