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ctan 1238c40e43 fix(rules): resistance is a +1 resistance bonus on fort/ref/will saves for 1 minute - SRD spells/resistance.md grants the subject a +1 resistance bonus on saving throws for 1 minute (Will negates, harmless); the resistance bonus type already exists in the stacking model (effects.py BonusType), so the buff is expressible as a BuffEffect and was only deferred because _find_buff_spell returns the FIRST BuffEffect in known-spell order and cantrips cost no slots - encoding it would have made default_policy cast Resistance every round (for Tammara it would preempt Divine Favor and never kill anything); resistance.json now carries a BuffEffect (+1 resistance on fort/ref/will, 10 rounds = 1 minute) and _find_buff_spell skips level-0 spells (cantrips have no spell slot in the engine's budget - spell_slots_left has no level-0 key - and the policy deliberately never auto-casts them, a cantrip buff would be cast every round degrading the policy), so Resistance cannot preempt a leveled buff (Divine Favor) in the known-spell order; leveled buffs keep the historical first-match behavior (if the first one's slots are exhausted the buff branch gives up - the golden pins that); the resistance bonus type does not stack with itself (resolve_modifiers keeps the higher value); +9 tests (test_resistance.py: buff shape, cast on a willing ally consumes no d20 and applies without a save roll, the bonus rides save rolls, no self-stacking, expiry at 10 rounds, _find_buff_spell skips the slot-less cantrip / returns None without a leveled buff, _choose_spell_action proposes Divine Favor and never Resistance); golden untouched; 1714 tests green 2026-09-20 10:10:32 +02:00