Re-reading an unchanged projected face could walk its loops in another order or direction, or (from some meshes) return the same half of a split circle twice. The link was then rebuilt, warning and dropping constraints on it. Projected geometry now compares by position regardless of order and direction, and a duplicated half arc is turned into the missing half. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL