nx_writecraft_gate.nx

nx_writecraft_gate.nx -- REFEREE for WRITING rung W-R0 (nx_writecraft). Proves the prose-measurement bedrock with no mocks: [T1] exact word/sentence/syllable/letter/complex counts on a known sentence [T2] exact syllable heuristic on hand-verified words (incl. silent-e + "Cle") [T3] exact readability milli-values (FRE / FKGL / FOG) on T1 [T5] div-by-zero guard: text with no end punctuation still scores (S->1) [T4] NEGATIVE CONTROL: graduate-jargon text MUST score a higher grade and a lower reading-ease than a simple sentence -- the metric discriminates, it does not return a constant. A constant-returning organ fails here. Evidence -> stdout + knowledge/status/writecraft_gate.log. Exit 0 GREEN / 1 RED. Sovereign x86_64 throughout. license_tier: ORIGINAL