uefn-physics-mesh (MVP experimental, B10)

Source: Claude/docs/mcp/physics-mesh.md, recipes.json, SKILLS-PROPOSAL.md B10. Read first: skills uefn-mcp-lab-guard and uefn-create-use-remove-one-script.

Rules

• Paths in GUID form: /09e4e8d3-83f9-4ee0-9777-072ed3984380/root_ai_lab. Run from PowerShell.
• The guard is never bypassed; a refusal is reported verbatim. If a recipe fails: report the exact error and STOP.
• Must NOT: write to /AnimToTexture or /FigureCosmetics meshes, place simulating actors.

Status: 50/63 ok, 13 tools without ok

• StaticMesh not available in the project (0 StaticMesh; duplicate of an engine mesh is rejected by the editor: outside valid asset roots): StaticMeshTools set_nanite_enabled, remove_collisions, generate_convex_collisions, generate_lods, remove_lods, set_lod_thresholds, set_material, get_vertex_count, get_triangle_count.
• import_file (Static/Skeletal/Texture) and TextureTools/export_png: refused by the guard rule on disk paths (drive-letter path, even inside the project). Not circumvented; owner decision.
• Unblock (owner): import/copy one StaticMesh into the lab by hand, or allow project-folder paths for import_file.

Recipes tool-ok or proven (recipes.json)

• StaticMeshTools (editor_toolset.toolsets.static_mesh.StaticMeshTools): get_bounds {mesh} (e.g. /Engine/BasicShapes/Cube.Cube, returns {min,max,isValid}), get_lod_thresholds, get_material_slots, is_nanite_enabled.
• SkeletalMeshTools (...skeletal_mesh.SkeletalMeshTools): get_bounds, get_bone_names, get_physics_asset, get_socket_transform.
• PhysicsAssetToolset (PhysicsToolsets.PhysicsAssetToolset): GetBodyNames, GetBodyShapes, GetConstraints, GetBodyPhysicsMode, GetBodyMassScale.
• PrimitiveTools (...primitive.PrimitiveTools): add_cube, add_sphere, add_cone, add_cylinder {actor, name, dimensions}; the actor must be created in the SAME process; cleanup SceneTools/remove_from_scene {actor} in the same script.
• TextureTools: get_size.
• SceneTools/get_collision_channels.

Traps

• get_lod_count returns 0 on engine meshes, so vertex/triangle counts fail.
• reset_properties resets to the CLASS default, not the original: restore with set_properties of the originals.
• read_texture returns a pointer string; find_assets for SK_/SKM_/PA_ returns 1200-1800 paths (filter).

To try (not verified)

• collision_set_and_revert (ObjectTools/set_properties on StaticMeshComponent0 of a lab actor): unverified in recipes.json (worked in physics-mesh.md, not promoted).
• SkeletalMeshTools sockets add/rename/transform/remove, set_material, assign_physics_asset; PhysicsAssetToolset CreateFromMesh, AddBody, RemoveBody, AddConstraint, RemoveConstraint, SetBodyPhysicsMode, SetBodyMassScale, SetConstraintLimits, SetSphere/SetBox/SetCapsule, RemoveShape: all unverified (recipes in recipes.json, no lab-owned skeletal mesh/physics asset to run on).