nx_register.nx

nx_register.nx -- WRITING arc, rung W-ING-3 (X-WRITE-ING-002): the REGISTER CLASSIFIER + SFW/EXPLICIT ROUTING SEAM with GOVERNANCE. This is the seam from the 2026-06-12 fiction-ingestion spec: the tutor (Claude) builds the content-agnostic mechanism; the operator's local-LLM lane runs the explicit register THROUGH it. MECHANISM ONLY (no explicit content authored here): a register is scored by an intensity LEXICON that is pure DATA (rule 25) -- the caller supplies terms + per-term weights. The SFW lane and the operator's explicit lane each extend the lexicon WITHOUT touching this organ. The gate proves the math with benign proxy terms (calm/heated/graphic). GOVERNANCE is non-bypassable by construction: content that scores at/above the explicit threshold may route to the explicit lane ONLY if age + consent + locale all pass; otherwise it is REFUSED. (Anti-exploitation X-ETH-001, consent/ provenance, locale-law + age-verification -- all DATA inputs to rg_decision.) rg_score(t, a, b, terms, weights, nterms) -> sum(count(term)*weight) = intensity rg_decision(score, threshold, age_ok, consent_ok, locale_ok) -> RG_ROUTE_SFW(0) : below threshold -> tutor/team SFW lane RG_ROUTE_EXPLICIT_LANE(1): at/above threshold AND governance OK -> local lane RG_ROUTE_REFUSE(2) : at/above threshold AND governance NOT satisfied Pure integer, NO syscalls. Reuses nx_ingest's whole-word counter (DRY). license_tier: ORIGINAL module: nishi-core.write.register depends: nishi-core.write.ingest capability: WRITE_REGISTER_ROUTING