forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
9c1c8f75c2
SolidCraft lists a solid's faces in a different order from run to run (the rounded box, for one), which reordered the triangle soup and the face tags with every coordinate the same; welding keeps the first copy it meets and every later stage visits ids in order, so the tet mesh changed between runs. CanonicalSoup sorts the triangles by their coordinates, numbers vertices by first use and face tags by first appearance, and maps the tags back; mesh.tet.generate and the corpus use it. Tests: the washer's tet10 mesh has a fixed fingerprint (identical on arm64 and x86-64 builds); a reordered, renumbered input gives the same mesh; heavy: rounded-box and filleted-bracket mesh bit for bit the same on repeated runs and with 1 and 8 threads. The bracket oracle cases stay unfrozen: SolidCraft's tessellation itself differs in the last bits between arm64 and x86-64. The coarse case moves to 203.6 MPa with the canonical order; its band is 5%. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo