nx_fin_dispute.nx

nx_fin_dispute.nx -- R8 (fail-safe execute) of THE NISHI FINANCIAL ECOSYSTEM: turn audit findings into a filled, ready-to-send MEDICAL-BILL DISPUTE LETTER. This is the "executing -> reducing costs" verb for the operator's cancer-billing crisis: the engine renders the artifact, the OPERATOR reviews and sends it. NEVER-BRICK / FAIL-SAFE BY CONSTRUCTION (#26): disp_build writes ONLY into a caller buffer -- it has no socket, no file send, no transmit. It can NEVER auto-send a dispute, mail a letter, or take an irreversible action. It produces text; a human decides what to do with it. Amounts are exact no-float cents (nx_money). Reasons are cited to standard billing-integrity grounds (duplicate / NCCI unbundling / Medically Unlikely Edits / reasonable-charge benchmark) + FDCPA dispute + No Surprises Act, grounded on the fetched corpus (fin_r3_no_surprises_act, fin_r6_fdcpa, fin_r10_cpt/medicare). PRIVACY: patient/ provider/account are caller-supplied (operator's specifics stay LOCAL; never enter web queries). reason codes: 1=duplicate, 2=unbundling, 3=MUE over-units, 4=fair-price. license_tier: ORIGINAL