OAS Core

When to use

Reach for this skill any time you are emitting or modifying the foundational entities of an OAS plan: rooms, walls, openings, curtain walls, roofs, floor slabs, furniture, railings, or annotations. If the task is purely about coordinates and polygons, use oas-geometry instead. If the task is multi-level resolved geometry with stair/elevator connections, use oas-layout.

Key types

• Document metadata + units block (always { length: "mm", angle: "deg" })
• Level — abstract reference plane at an elevation; not a physical element
• Room — bounded space with a boundary_polygon and usage
• Wall — straight line segment with thickness separating spaces; carries adjacent_rooms
• Opening — door or window placed on a wall via position_along_wall_mm
• CurtainWall — glazed envelope; sibling of Wall, not a subtype
• Roof — sloped covering with defines_slope and eave_overhang_mm
• FloorSlab — the physical floor element (distinct from an abstract Level)
• Furniture — placed objects with position + rotation (formerly an extension, now in Core)
• Railing — barrier element; path may include optional z on stair runs
• Annotation — labels, dimensions, notes