fix(rules): apply the power attack penalty to melee touch attacks

PF1e (CRB Power Attack): "take a -1 penalty on all melee attack rolls ...
The bonus damage does not apply to touch attacks." A melee touch (kind
"touch", no range increment) is a melee attack, so _power_attack_amt now
rides its attack and confirmation rolls; the +2X/+3X damage bonus stays
gated on kind == "melee". Ranged attacks and rays are unaffected. The
test that pinned the old melee-weapon-only simplification was rewritten to
lock the corrected behavior; README and abilities.py updated.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

README.md

@@ -743,8 +743,11 @@ Règles modélisées :
   ex. le contact paralysant du liche) n'en fait rien. Conformance P2 : le
   contact de mêlée (touch sans incrément) est une **attaque de mêlée** — il
   bénéficie du flanquement, de la hauteur (+1), du +4 contre une cible inerme
-  et peut porter une attaque sournoise ; Power Attack reste réservé aux armes
-  de mêlée (le contact n'en bénéficie pas).
+  et peut porter une attaque sournoise ; Power Attack (conformance A6 — CRB :
+  « a –1 penalty on all melee attack rolls… The bonus damage does not apply to
+  touch attacks ») s'applique à **la touche** du contact de mêlée (pénalité −X
+  au jet d'attaque et de confirmation) mais son bonus de dégâts reste réservé
+  aux armes de mêlée (le contact ne gagne pas le +2X/+3X).
 - Jets de sauvegarde : `resolve_save(state, save_type, dc)` — fort/ref/will.
   1 naturel = échec automatique, 20 naturel = succès automatique. Les
   modificateurs d'effets (`StatModifier` avec `target` correspondant) sont
@@ -1205,7 +1208,9 @@ la lecture mais non appliquée dans la résolution.
 - `abilities.py` — dons et capacités : `AbilitySpec` (dataclass avec
   catégorie feat/class/racial/trait) et fabriques de dons (Weapon Focus ciblé
   par arme, Toughness lié au niveau, Power Attack actif −X attaque / +2X
-  dégâts, X = BAB//4 + 1, mêlée uniquement, activé comme action libre via le
+  dégâts, X = BAB//4 + 1 — la pénalité −X vise toutes les attaques de mêlée
+  (contact de mêlée inclus, conformance A6), le bonus de dégâts uniquement les
+  armes de mêlée —, activé comme action libre via le
   kind `activate_power_attack` qui pose `state.power_attack`). Conformance
   B16 (CRB « Power Attack ») : le bonus de dégâts passe à **+3X (×1,5)** pour
   une arme marquée `two_handed: true` dans le JSON de l'attaque (arme à deux

src/pf1e_simulator/abilities.py

@@ -139,8 +139,9 @@ DODGE = AbilitySpec(
     ),
 )
 
-# Power Attack: active feat — declare at turn start, -X atk / +2X dmg on all
-# melee attacks this turn, where X = BAB//4 + 1 (min 1). No passive modifiers;
+# Power Attack: active feat — declare at turn start, -X atk on all melee
+# attack rolls (melee touch included) and +2X dmg on melee WEAPON damage only
+# (never touch), where X = BAB//4 + 1 (min 1). No passive modifiers;
 # the engine checks for this feat and the ``power_attack`` flag on state.
 POWER_ATTACK = AbilitySpec(
     name="Power Attack",

src/pf1e_simulator/combat.py

@@ -2283,7 +2283,12 @@ class CombatEngine:
         if self._is_melee_attack(weapon) and self._is_helpless(target):
             atk_mods.append(StatModifier(target="attack", value=_HELPLESS_MELEE_BONUS))
         attack_mod = resolve_modifiers(atk_mods)
-        pa_amt = self._power_attack_amt(attacker) if weapon.kind == "melee" else 0
+        # PF1e (CRB Power Attack): the -X penalty rides ALL melee attack rolls
+        # — a melee touch (no range increment) is a melee attack. The damage
+        # bonus it buys stays weapon-only (see _resolve_hit_damage).
+        pa_amt = (
+            self._power_attack_amt(attacker) if self._is_melee_attack(weapon) else 0
+        )
         fd_penalty = (
             _FIGHT_DEFENSIVELY_ATTACK_PENALTY if attacker.fight_defensively else 0
         )
@@ -2445,7 +2450,10 @@ class CombatEngine:
         # weapon used in two hands, or a primary natural with 1.5x Strength
         # (modeled via the weapon's `two_handed` flag). The off-hand /
         # secondary-natural halving (-50%, +1X) is NOT modeled: two-weapon
-        # fighting is not in the engine (documented simplification).
+        # fighting is not in the engine (documented simplification). The
+        # bonus damage never applies to touch attacks (CRB), which is why
+        # this gate is kind == "melee" while the -X penalty also rides melee
+        # touch rolls.
         if weapon.kind == "melee":
             damage += pa_amt * (3 if weapon.two_handed else 2)
         if crit:

tests/test_conformance_p2.py

@@ -6,7 +6,9 @@ B8  Flanking: the flanking ally must actually THREATEN the target (a reach
     weapon's 5-ft dead zone does not threaten) and must not be unable to act.
 B9  Melee touch (kind "touch", no range increment) is a melee attack: it gains
     flanking, high ground, the vs-helpless +4 and can sneak attack; Power
-    Attack stays melee-only.
+    Attack's -X penalty rides its attack rolls while the bonus damage never
+    applies to touch (A6 refinement — the original "melee-only feat" reading
+    was itself a deviation).
 B10 Blinded: NO flat -2 on attack rolls (the modeled 50% total-concealment
     miss is the RAW penalty); the -4 Dex-skill penalty rides the dex_skills
     target (B22).
@@ -233,7 +235,7 @@ def test_melee_touch_can_sneak_attack() -> None:
     assert any("sneak attack" in line for line in eng._transcript)
 
 
-def test_power_attack_still_excludes_melee_touch() -> None:
+def test_power_attack_penalizes_melee_touch_attack_roll() -> None:
     atk = _combatant(
         "atk", bab=5, attacks=(_touch("atk"),), features=("Power Attack",)
     )
@@ -242,8 +244,11 @@ def test_power_attack_still_excludes_melee_touch() -> None:
     a = eng._states[0]
     a.power_attack = True
     result = eng.resolve_attack(a, eng._states[1], _touch("atk"))
-    # Power Attack is melee-weapon-only: the touch swing keeps its full bonus.
-    assert result.total == 10 + 10
+    # PF1e (CRB Power Attack): the -X penalty rides ALL melee attack rolls and
+    # a melee touch IS a melee attack (X = 5//4 + 1 = 2); the bonus damage
+    # never applies to touch attacks — 1d6 = 2, no +2X.
+    assert result.total == 10 + 10 - 2
+    assert result.damage == 2
 
 
 # ── B10: blinded has no flat attack penalty ──────────────────────────────────