IffAndCombatTests builds a minimal headless world (CultCache catalog, a Ship
hull and a gun with InstantWeaponData, an empty Zone/GalaxyZone) and pins:
override decides outright; clearing restores the derived rule; leaving the
zone clears overrides; the derived reciprocity path can't mirror another
entity's override; grudge triggers immediately whether the mark or the
detection happens second, is detection-gated, is sticky, and never fires for
a player-controlled entity; PerceivedStanceOf is unknown until detected;
Weapon.StanceAllowsFire and InstantWeapon.Trigger refuse to fire on a neutral
target and fire on a hostile one (and with no target at all); LockWeapon
builds lock on the shooter's own stance, not the target's; and
ZoneGenerator.EligibleWandererFactions excludes the owner and nearest faction
(and is empty when neither is eligible).
Adds one mutation per rule to tests/mutation_tests.py, all KILLED against
this HEAD (control still GREEN).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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