Operate on UObjects through UCP's `call` command. This skill covers two function libraries: one available at runtime and one editor-only.

Manage actors in UE levels via UCP. Use when the user asks to spawn, delete, move, duplicate, select, or otherwise manipulate actors in the Unreal Engine editor.

Query and manage UE assets via UCP. Use when the user asks about asset search, dependencies, referencers, asset CRUD, asset management, getting selected/current assets, opening/closing asset editors, or any editor asset operation in Unreal Engine.

Edit UE Blueprint node graphs via text (ReadGraph/WriteGraph). Use when the user asks to add, remove, or rewire Blueprint nodes, create/modify functions, events, or variables in a Blueprint graph.

Edit UE material node graphs and properties via text (ReadGraph/WriteGraph). Use when the user asks to add, remove, or rewire material expression nodes, or change material properties like ShadingModel or BlendMode.

Edit UMG Widget Blueprint UI layouts via text (ReadGraph/WriteGraph). Use when the user asks to add, remove, or rearrange UI widgets, change widget properties, or modify the visual hierarchy of a Widget Blueprint.

Communicate with a running UE editor through the UnrealClientProtocol TCP plugin. UCP exposes a single command — call any UFunction on any UObject via JSON. All functionality is provided through Blueprint Function Libraries that you invoke this way.