A cutout cut in pieces around tabs is a set of open cut figures. Filling the
cut outline closed each piece with a chord, drawing a slanted bridge across
the hole. The fill path now rejoins open figures across their tab gaps, and
parts with open cuts use it for drawing, hit-testing and the lead-in overlay.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
