# ifc-geometry constraint instructions
Scope: Views and resolution inputs for placements, grids, and geometric connections.
Follow the crate `../../AGENTS.md`.
## Owns
- local/grid/linear placement references
- grid axes/intersections
- connection geometry references
- cycle-detection inputs and local rules
## Does not own
- global spatial indexing
- product semantics
- map/CRS conversion
## Growth map
`local.rs`, `grid.rs`, `connection.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.