Summary

Tightens STEP regression coverage for two board-only fixtures that were previously guarded only by a loose meshes.length > 0 OCCT import check.

repro02 — rotated-pill hole board

Adds an exact solidCount assertion after the existing MANIFOLD_SOLID_BREP presence check:

const solidCount = (stepText.match(/MANIFOLD_SOLID_BREP/g) || []).length
expect(solidCount).toBe(1)

Why 1? repro02.json contains source_components (MP1-4, Xpattern1-4) but no pcb_component entries. The STEP converter only generates component boxes for cad_component records. Without those, the board itself is the only solid. A regression that:

• fragments the board during rotated-pill hole subtraction, or
• adds spurious boxes for source-only components

…would cause solidCount > 1 and fail this guard.

repro03 — hole-wrapper component exclusion

Adds two new assertions:

1. expect(stepText).toContain("MANIFOLD_SOLID_BREP") — basic presence check (was missing)
2. solidCount = 1 guard — hole-wrapper pcb_components must never receive fallback boxes

Why 1? All pcb_component entries in repro03.json are subcircuit hole-wrapper containers (obstructs_within_bounds). Restoring the erroneous fallback that generates boxes for these wrappers would push solidCount above 1 and fail the test — exactly the regression repro03 was designed to catch.

Non-overlap with existing open PRs

No conflicts, purely additive test assertions on two fixtures not covered by any open PR.

/claim #6