# CDSL Bridge: Flange Bolt Circle

- Keep bolt-circle diameter, count, start angle, and hole diameter explicit.
- Since the runtime has no circular-pattern atomic, expand the layout into explicit circle centers in a `circles` profile and cut them together.
- This is a semantic expansion, not an arbitrary approximation; report `expanded: circular_pattern_to_explicit_circles`.
- Do not use a rectangular grid for a circular flange.