nx_worldgen_tuner_test.nx

nx_worldgen_tuner_test.nx -- KATs for the verdict-targeted tuner machinery (nx_worldgen_tunelib). Gate module: /tmp-only side effects (the real tuner's durable banking is exercised by its live runs, not here -- a gate beat must never mutate team state). Exit 0 = all pass; first failing KAT's number is the exit code. KAT 1 conf parse: ints, negatives, missing-key fallback. KAT 2 refine-axis string parse (the banked verdict's form). KAT 3 axis mapping: every refine axis -> a verdict offset; FLATNESS value inverted (lower flat = higher score). KAT 4 score is lexicographic: one grade step beats any axis value. KAT 5 eval determinism: same (preset, density, knobs) -> identical 12-slot verdicts. KAT 6 the knob does its job: detail_amp 140 raises LOCAL_VARIATION vs detail_amp 0 (same preset/density -- the ADD_DETAIL claim at tuner level). KAT 7 knob banking round-trip: write a /tmp conf, tl_load_knobs reads it back exactly; missing file falls back to preset defaults. license_tier: ORIGINAL