# ifc-geometry solid instructions
Scope: Borrowed views and local semantic validation for IFC solid/model entities.
Follow the crate `../../AGENTS.md`.
## Owns
- swept/CSG/boolean/half-space/B-rep/tessellated/surface-model/bbox views
- operand/select classification
- solid-specific WHERE rules
## Does not own
- boolean evaluation
- triangulation or healing
- recursive lowering/graph ownership
## Growth map
`swept/`, `csg.rs`, `boolean.rs`, `halfspace.rs`, `brep.rs`, `tessellated/`, `surface_model.rs`, `bbox.rs`. These source owners already compile as private scaffold modules. Replace a module's planned-owner marker with its first real contract and tests; do not add parallel placeholders.
Every source entity error cites EntityId/type/slot or rule. Add invalid, cycle,
and unsupported cases, not only happy paths.