Use when authoring or modifying Unreal Blueprint assets through ue-mcp. Covers the read-then-write discipline, node/pin wiring, component (SCS) hierarchy, variables, interfaces, compilation, and the difference between pin defaults and linked inputs. Pulls in any time the user asks to create, edit, or inspect a Blueprint.
Use when writing or modifying native C++ UCLASSes in an Unreal project via ue-mcp. Covers create_cpp_class → write_cpp_file → live_coding_compile loop, when to use build vs Live Coding, and the add_module_dependency workflow. Pulls in any time the user asks to write a new native class, add a UPROPERTY, or implement a UFUNCTION.
Use when authoring Niagara VFX systems via ue-mcp — creating systems and emitters, adding renderers, setting module inputs and static switches, building HLSL modules, and batching operations. Pulls in any time the user asks for a particle system, VFX, Niagara emitter, or motion matching cost visualization.
Use when driving Unreal Engine editor via the ue-mcp MCP server. Covers the required order of operations (status check first), editor lifecycle, project scoping, and what to do when the bridge says "still initializing". Pulls in automatically any time the user asks to use an Unreal project or references ue-mcp tools.