nx_bodyparts.nx

nx_bodyparts.nx -- L0 TAXON + STRUCTURE CENSUS of the SEMANTIC TWIN LADDER (debt 1785954089; operator 2026-08-05: "it is a human, female, has a head, then eyes... a clay blob is not the same object as a girl"). Metric distance alone ranked an ARMLESS body first (nx_bodybench 278 vs 232) -- because no instrument could say WHAT the thing is. This organ answers the first question: IS IT A HUMANOID, AND WHICH PARTS EXIST? METHOD (structural, no rig required so it works on ANY mesh soup): slice the mesh into y-bands; in each band build an x-histogram and count CLUSTERS (occupied runs separated by >=BP_GAP empty bins). A standing humanoid has a signature no blob can fake: 3 clusters where the arms are clear of the torso, 2 clusters where the legs separate, and a NECK (a width minimum) below a head mass. A pawn silhouette is 1 cluster everywhere and is REFUSED as a humanoid -- semantically, not by score. Bone-weight-driven NAMED segmentation (L2, VRM's 51 humanoid bones = free parts for rigged donors) is the next rung and rides the same output rows. nx_bodyparts <mesh.nxmesh> [bands] | selftest Emits JSON: per-region cluster maxima, neck/head findings, part census, VERDICT=HUMANOID|NOT-HUMANOID with the MISSING part named. license_tier: ORIGINAL expect_exit: 0