nx_world_quality_grader_gate.nx

nx_world_quality_grader_gate.nx -- THE REFEREE FOR THE WORLD REFEREE, 2026-09-01. nx_world_quality_grader.nx shipped on 2026-05-16 and was NEVER BUILT: catalog read SOURCE-ONLY (S2) for it and for every one of its five consumers (nx_procgen_biome_test, nx_procgen_water_test, nx_procgen_features_test, nx_procgen_signature_test, nx_layer_verdict). A grader that has never compiled has never graded anything, and the estate law for that is a build-and-run deficit, not a cleverness deficit. IN-PROCESS over nx_world_quality_grader.nx, deliberately. A gate that fork/exec'd a deployed elf would report NOT-REACHED for every mutant and its GREEN would prove nothing about the code under test. WHAT THIS PROVES, STATED SO IT CANNOT BE OVER-READ: the 8-axis decision core -- the degenerate-input contract, the flatness INVERSION, the banded local-variation verdict, the optional-axis abstention, the biome and feature-variety rulers, the letter rubric and the refine-axis enum. It does NOT prove that the axes correlate with a human judgement of a world beauty; that is a referee-panel question and is not claimed here. THE SELF-TEST IN THE GRADER OWN main() IS NOT THIS GATE. It has no negative controls, no denominators, and its exit code is a bare 0 -- nothing downstream can read a verdict from it. Every tooth below that the self-test also covers is restated here so the verdict travels in the EXIT CODE, and the ones it never had are the reason this file exists. FIXTURES ARE BUILT IN MEMORY ON EVERY RUN AND TOUCH NO PATH AT ALL, so the run is idempotent by construction and can never share a fixture with a production beat. license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0