nx_meshvalid_gate.nx

nx_meshvalid_gate.nx -- the gate for nx_meshvalid_lib (/compare/dcc DC3). THE HAZARD THIS GATE IS SHAPED AGAINST: a validity checker that REFUSES EVERYTHING passes every negative test ever written for it. That is the inverse of the usual vacuity defect -- there the guard never fires, here it always does -- and four SSRF deny-tests once went green in this estate while the guard was wholly broken. So the load-bearing cell here is the POSITIVE control: a genuine closed tetrahedron with consistent outward winding that must come back with EVERY counter at zero. Each defect class is then a gv_bite: it must FIRE on its own planted defect and stay SILENT on the good mesh. The tetrahedron is built once and mutated per fixture, so every negative control differs from the positive one by exactly the defect under test -- if it differed by more, a kill would not attribute to the defect. 100% sovereign. No hardware writes (Rule 26). license_tier: ORIGINAL expect_exit: 0