nx_rpgstats_gate.nx

nx_rpgstats_gate.nx -- CERTIFICATION of nx_rpgstats (gamebench gap-queue rank 1 after save/load landed). T1 XP curve strictly monotonic across 1..200 (a character can never fail to progress) T2 level_for_xp is the EXACT inverse of xp_for_level at every boundary and boundary-1 T3 ★MODIFIER STACKING IS ORDER-INDEPENDENT -- forward, reversed and rotated orders agree. This is the real bug class: +10 then +20% != +20% then +10 in most engines, so buff order silently changes outcomes and desyncs multiplayer. T4 saturation: absurd inputs clamp instead of overflowing into negative HP / wrapped levels T5 skill advancement monotonic in uses and capped at maxrank T6 DATA-DRIVEN: changing only the curve/formula parameters changes the outputs (proves the numbers are configuration, not literals baked into the code -- rule 11) T7 ANTI-VACUITY: a normal progression yields DISTINCT, sensibly ordered values. Without this a part that returned a constant (or zero) would satisfy monotonicity and clamping vacuously. T8 ★COMPOSES WITH nx_gamesave: a built character round-trips through gs_save/gs_load unchanged. This is the recombinator claim under test -- parts must actually compose, not just coexist. license_tier: ORIGINAL expect_exit: 0