nx_weather_gate.nx

nx_weather_gate.nx -- GATE for nx_weather_lib (2026-08-26). The accept rule, PRE-DECLARED: the continuous weather system may ship only if (1) it PRESERVES the banked seasonal rain rates (P_RAINS rows) within the binomial envelope -- adopting it cannot silently change any world's climate; (2) it exhibits the PERSISTENCE the old coin structurally lacked, measured, not asserted; (3) every field is replay-deterministic; (4) precipitation typing obeys the freezing bound; (5) wind spikes on pressure fronts. Neg-controls prove the teeth can fail. license_tier: ORIGINAL No hw writes (Rule 26).