engine: implement 6 more abilities (Leaf Guard, Liquid Ooze, Unaware, Rock Head, Serene Grace, Sand Force follow-on)#89
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June 24, 2026 22:51
Leaf Guard refuses every major status while the sun is up, via a new state-aware BlocksStatusState guard consulted in inflictStatus. Liquid Ooze turns a drain against its holder into damage on the drainer instead of a heal, gated by a new DrainBackfires flag in the effects drain path.
Unaware blanks the opponent's stat stages in the damage formula: when its holder attacks, the defender's defensive boosts are ignored; when it defends, the attacker's offensive boosts are ignored. Unlike IgnoreDefensive (which only clamps positive defensive stages), Unaware zeros stages in both directions, via a new IgnoresOpponentStages flag read in offensiveDefensiveStats.
Rock Head cancels the holder's own move recoil (narrower than Magic Guard's blanket indirect-damage immunity), via a BlocksRecoil flag checked in the recoil branch. Serene Grace doubles the holder's secondary-effect chances on damaging moves (clamped at 100%), via a SecondaryChanceMult read in the secondary-roll loop.
Re-align struct fields and registry entries after the batch 4-6 additions; no behavior change. Fixes the Format CI step.
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Follows #88. Continues the ability backlog with Tier A entries that reuse or minimally extend existing hooks, bringing coverage to 68/107. Each batch is one commit.
Batches
BlocksStatusStateguard ininflictStatus;DrainBackfiresflag in the drain pathIgnoresOpponentStagesflag zeros the foe's stages inoffensiveDefensiveStats(both attacking and defending)BlocksRecoilflag in the recoil branch;SecondaryChanceMult(×2, clamped 100%) in the secondary-roll loopTests
Each ability has behavioral coverage in
abilities_test.go(Leaf Guard sun gating, Liquid Ooze drain backfire, Unaware both directions, Rock Head recoil negation, Serene Grace multiplier + clamp). Full engine suite green.Scope
All changes confined to
abilities.go,effects.go,damage.go, andabilities_test.go.