nx_commonsbench_gate.nx

nx_commonsbench_gate.nx -- THE RULER for neighbour-commons standing. Scores BOTH rules on ONE population so the delta is a measurement, not a claim. Per operator doctrine (feedback-match-known-good-then-improve, said twice): bank the baseline FIRST, ship the smallest edit, RE-MEASURE, state the delta. An unmeasured change is an opinion and a stack of them is unattributable. So this gate runs the INCUMBENT (the pairwise tolerance-ratio rule nx_mycorrhiza/nx_hypha compute TODAY) and the CHALLENGER (nx_commons_lib) over identical fixtures. Both rules live in nx_commons_lib, the incumbent kept deliberately as a NEGATIVE CONTROL exactly as nx_connect_match_lib keeps the arithmetic mean beside the harmonic mean -- so a later author can reproduce the comparison that justified the replacement. EVERY DISCRIMINATING TOOTH IS BITE-PROVEN, not merely passed: it must FIRE on the incumbent and be SILENT on the challenger. A tooth that is green before the defect exists is VACUOUS and proves nothing. T6 is the exception and is marked as such: both rules pass it, so it is a GUARD (it can only catch a regression) and not a discriminator. Naming that difference is the point. verdict emission INHERITS nx_gate_verdict (D001 / law L009), so nx_gate_green can judge this gate from outside and it records a harness.jrnl frame -- flake and erosion stay visible. license_tier: ORIGINAL expect_exit: 0