uefn-level-devices

Source: Claude/docs/mcp/level-devices.md, recipes in recipes.json. Before every write, apply uefn-mcp-lab-guard; for the create -> use -> remove cycle, see uefn-create-use-remove-one-script.

Rules

• Paths in GUID form /<guid>/<project>/.... The guard is not bypassed: a refusal is reported.
• If a recipe fails: exact error and stop.
• Do not leave actors in the level (always clean up). Do not call create_level/load_level (changes the open level). Do not use B-002.

Verified recipes

• Scene: SceneTools/add_to_scene_from_class (e.g. /Script/Engine.TargetPoint; the name becomes the LABEL; returns refPath), add_to_scene_from_asset, find_actors (collision_channels: [] required), set_actor_folder, get_folders, get_actors_in_folder, rename_folder, delete_folder, set_actor_hidden, remove_from_scene (cleanup), data layer (create_data_layer_asset, add_actors_to_data_layer, get_actors_in_data_layer, remove_actors_from_data_layer).
• Actors: ActorTools/set_label, add_tag, remove_tag, get_tags, set_actor_transform, get_actor_transform, add_component, remove_component, get_components, get_actor_bounds.
• Classic devices: DeviceToolset/ListDeviceAssets, PlaceDevice (catalog devices only: /Game, e.g. PID_CP_Devices_Hover_Platform; also #catalog /CreativeCoreDevices/SetupAssets/PID_Device_Button), GetBindingOptions, AddEventBinding (sourceEvent with spaces: On Player Spawned), ListEventBindings (lists on the TARGET), RemoveEventBinding (same 4 args).
• Device Verse: PlaceDevice {assetPath:{refPath:"/<guid>/_Verse.<progetto>-<classe>"}, transform} ok (T-011/T-015); ListDeviceProperties/SetDeviceProperty camelCase, with a verification read and restore. Events from/to Verse devices: not possible (GetBindingOptions empty).
• Entities: EntityToolset/CreateEntity (NPCInteropEntity_C under /Game; #simulation_entity removed via find_actors + remove_from_scene, DeleteEntity fails on the root), FindEntities, ListEntityClasses.

Tag what you create

• Right after placing or creating something, tag it (ActorTools/add_tag with kit:<run id>), so a clean-up or a second run finds exactly your objects and never makes a duplicate; check has_tag before removing.

Pitfalls

• Class of a Verse device: /Script/VerseDevices.ScriptDevice; to place it you need the path /_Verse. of the compiled class.
• Outliner folders disappear with the last actor.
• The level diff is not supported.
• TargetPoint actors make StartSession validation fail (A2): remove them first.

To try (not verified)

• SelectActors/FocusOnActors with a real actor: refused by the guard, do not bypass.
• create_level/load_level: deliberately not tried (they change the open level).