The bridge already exports face_ids + split normals — that's what makes external retopo tooling viable. A few more additive mesh attributes (not an API) would unlock far more:

Edge identity: persistent edge_id per vertex on a CAD edge, plus per-edge curve type/params (line / arc {center, axis, R} / spline) and smooth/sharp flag.

Per-vertex surface UV in the face's parametric domain.

Nice to have: surface type/params per face, G-flags.

Parasolid already computes all of this at tessellation — it's writing what the kernel knows into the mesh you already export.

Without it, tools reverse-engineer triangles: circle-fitting edges, approximating UVs, guessing corners. With it, quad retopo becomes deterministic — seams weld by edge ID, fillets mesh as true cylinders, concave faces unwrap exactly.