nx_weather_lib.nx

nx_weather_lib.nx -- LIB: THE WEATHER SYSTEM (2026-08-26). The shipped weather was ONE deterministic coin per day-eighth (cal_rain: seed x segment x P_RAINS[season] -> 0/1) -- honest, replay-exact, and structurally memoryless: no buildup, no fronts, no wind vector, no typed precipitation. This lib is the continuous state the coin could not express, built ON the same determinism law (every field is a pure function of (seed, absolute day-eighth, season table)), and CALIBRATED TO THE BANKED DATA: the P_RAINS seasonal rows are preserved as the LONG-RUN rain rates -- the gate proves the empirical frequency matches the row within a binomial bound, so adopting this system cannot silently change how often it rains in any world. STATE per absolute day-eighth e (all Q12, 0..4096 unless noted): pressure p(e): a bounded seeded random walk with persistence -- the front carrier. humidity h(e): seasonal base from the world's OWN P_RAINS row (data-driven), plus a walk. coverage c(e): cloud cover = f(low pressure, high humidity) -- what the sky consumer reads. rain r(e): coverage above a threshold DERIVED from the row (see wx_rain) -- typed by temp. temp t(e): seasonal sinusoid + night cooling, Q12 relative scale (freezing = WX_FREEZE_Q). wind w(e): speed from the pressure GRADIENT |p(e)-p(e-1)| (fronts are windy -- the physical shape, not a random number), direction a slow seeded walk. PERSISTENCE is the capability the coin lacked: every walk mixes the PREVIOUS eighth's value, so P(rain | rain at e-1) > P(rain | dry at e-1) -- measurable, and the gate measures it. license_tier: ORIGINAL No hw writes (Rule 26).