nx_softbind_gate.nx

nx_softbind_gate.nx -- prove the solver-to-GEOMETRY binding is real (roadmap rung A4). nx_softdyn was 7/7 in isolation but bound to nothing; this gate proves the BINDING layer: per-mob hair/chest/skirt spring points driven by root motion, renderer-facing Q8 offsets. T1 LAG chest offset trails an accelerating root (that IS the jiggle signal) T2 OVERSHOOT root stops -> hair swings through the anchor (sign flips) = oscillation T3 SETTLE energy decays to a fraction of its peak (no perpetual motion) T4 CLAMP a teleporting root can never separate tissue past its per-kind clamp T5 KINDS DIFFER hair (soft, long clamp) peaks HIGHER than chest (stiff, short clamp) T6 DETERMINISM same trajectory twice -> identical checksum; different trajectory -> different T7 BITE the jiggle-missing detector FIRES on a frozen rig, stays SILENT on the live one T8 IMPULSE a kick displaces then returns to rest (hits/footfalls inherit realism) license_tier: ORIGINAL expect_exit: 0