nx_memvel_gate.nx

nx_memvel_gate.nx -- referee for the SUSTAINED-GROWER predicate (rm_sustained_count), 2026-08-14. WHY THIS GATE EXISTS: nx_memvel had no referee at all, and the column its own header calls decisive (grew_in = k/N) was printed PER ROW and never totalled, so no caller could branch on it. Every consumer therefore fell back to nx_resmon's leak census, which is a SNAPSHOT relation (VmSize==VmPeak) -- a LEVEL, and a level cannot express a leak. Measured on this box the same day: 17 leak suspects against a red threshold of 6, so nx_resmon was RED PERMANENTLY, while the true sustained-grower count was 0 in back-to-back runs. THE TOOTH THAT MATTERS IS T7. It asserts the two predicates DISAGREE on the shape that caused this work: the screen calls nx_hub_gw a candidate, the velocity predicate clears it. A change that reduced rm_sustained_count to echoing the screen would pass every other tooth here and fail only T7 -- and that echo is precisely the defect this work removed. Every input is synthetic: no /proc, no fixture on disk, no added load, deterministic by construction. license_tier: ORIGINAL expect_exit: 0