nx_tone_gate.nx

nx_tone_gate.nx -- REFEREE for WRITING rung W-TONE-1 (nx_tone). [T1] EXACT fingerprint math: a controlled text -> hand-computed dims (cadence tf[0], avg word length tf[1]) prove the counting+normalization. [T2] DISCRIMINATION: a terse voice vs an ornate voice differ in the EXPECTED DIRECTION on independent dims (cadence + adverb ratio) -- the fingerprint carries real signal, it is not a constant. [T3] THE CAPABILITY ("write in my tone"): given a target voice A and a contrast voice B, a NEW terse draft matches A (tn_closer==1) and a NEW ornate draft does NOT (tn_closer==0). Correct voice attribution. [T4] NEG-CONTROL / metric sanity: dist(A,A)==0 (identical -> zero); a voice matches itself over a contrast. Evidence -> stdout + knowledge/status/tone_gate.log. Exit 0 GREEN / 1 RED. Sovereign x86_64. license_tier: ORIGINAL