feat(rules): sunder deals real weapon damage vs object hardness/hp; broken weapons usable at -2 with restricted crits

SRD Sunder + CRB 'Smashing an Object' / 'Conditions - Broken': weapons
carry Table 7-12 object stats (AttackSpec.hardness/hit_points/enhancement,
defaults by weapon class); a successful sunder deals the attacker's actual
physical weapon damage minus the target weapon's hardness, subtracted from
its hp. At <= half hp the weapon gains the broken condition - still usable
at -2 attack/damage, crits only on a natural 20 at x2. At <= 0 it is
destroyed (weapon_destroyed, unusable). The old flat str_mod+2 / durability
10 / synthetic 'disarmed' condition is gone. Firearm misfire carve-out kept
(broken firearms stay unusable until Quick Clear - misfire escalation not
modeled, documented).

README.md

@@ -1526,10 +1526,22 @@ Règles modélisées :
    naturel réussit **toujours** à l'escape d'un grapple (« Rolling a natural
    20 while attempting a combat maneuver is always a success (except when
    attempting to escape from bonds) » — un grapple n'est pas un lien), le 1
-   naturel échoue toujours. Un sunder endommage l'**arme**, pas les PV : `str_mod + 2`
-  de dégâts à l'arme, qui se brise à 10 d'usure cumulée (`_WEAPON_DURABILITY`) →
-  `disarmed` ; une arme brisée est exclue de `usable_attacks()` et réparable via
-   `Action(kind="repair_weapon")`. overrun →
+    naturel échoue toujours. Un sunder endommage l'**arme** comme un OBJET, pas
+   les PV (SRD « Sunder » / CRB « Smashing an Object ») : les dégâts réels de
+   l'arme de l'attaquant (composantes physiques + bonus plat ; une arme brisée
+   frappe à −2), moins la **dureté** de l'arme cible, sont retranchés de ses
+   **points de vie d'objet**. Chaque arme porte donc dureté/pv d'objet
+   (`AttackSpec.hardness`/`hit_points`, défauts de la Table 7-12 par classe
+   d'arme : lame en acier 10/5 une main, 10/10 deux mains ; arme emmanchée
+   bois 5/5 et 5/10 ; arme de jet 5/5 ; `enhancement` ajoute +2 de dureté et
+   +10 pv par +1). À **pv ≤ moitié**, l'arme gagne la condition **brisée** :
+   elle reste **utilisable** à **−2 aux jets d'attaque et de dégâts**, ne
+   menace de critique que sur le **20 naturel** et ne fait que **×2** (CRB
+   « Broken »). À **pv ≤ 0**, l'arme est **détruite** (`weapon_destroyed`) :
+   excluante de `usable_attacks()`. Simplification documentée : l'option SRD
+   « réduire à 1 pv au lieu de détruire » n'est pas offerte (le moteur
+   détruit toujours). Une arme brisée (non détruite) est réparable via
+    `Action(kind="repair_weapon")` ; une arme détruite ne l'est pas. overrun →
    passage au travers si la case au-delà est libre, et `prone` 1 round
    **seulement si le jet dépasse le CMD de 5 ou plus** (conformance R3 — CRB
    « Overrun » : « If your attack exceeds your opponent's CMD by 5 or more,
@@ -1645,7 +1657,12 @@ Règles modélisées :
     feu (`firearm: true`) sur un **1 naturel** casse l'arme (`weapon_broken`,
     journalisé « MISFIRE (broken) ») — valeur de misfire minimale 1 ; la
     progression de la valeur de misfire et l'explosion des early firearms
-   re-cassées ne sont pas modélisées (une arme brisée ne peut plus tirer ici)),
+    re-cassées ne sont pas modélisées. Interaction avec la règle « Broken » :
+    une arme de mêlée brisée reste utilisable à −2, mais une **arme à feu
+    brisée reste exclue** de `usable_attacks()` (le SRD la laisserait tirer à
+    −2 avec une valeur de misfire majorée de 4 — cette progression n'étant
+    pas modélisée, le moteur interdit prudemment de tirer avec un pistolet
+    enrayé jusqu'à Quick Clear ou `repair_weapon`),
    `inspire_courage` + `spell_combat` (misty — Spell Combat : action de round
   complet, incante un sort standard et porte toutes ses attaques de mêlée à
   **−2** (CRB Magus, conformance — la pénalité s'applique à chaque jet
@@ -1685,7 +1702,7 @@ Règles modélisées :
   state) -> tuple[Action, ...]`). Schéma enrichi (E1-E5) :
   - Par combattant : id, side, pos, occupied_cells, hp/hp_max, active/dead,
     dying/stabilized, conditions (noms + rounds_left), resources_left (+ `spell_slot_{level}`),
-    weapon_broken/weapon_stolen/weapon_dropped, grappled_with, moved_this_turn, power_attack,
+    weapon_broken/weapon_destroyed/weapon_stolen/weapon_dropped, grappled_with, moved_this_turn, power_attack,
     name, level, size, natural_reach_ft (S4c : allonge naturelle du gabarit
     en pieds — 0 pour Tiny/Diminutive/Fine, 5 pour Small/Medium, 10 pour
     Large… ; l'allonge effective d'une attaque reste `max(allonge naturelle,
@@ -1702,7 +1719,7 @@ Règles modélisées :
     fraîche), casting_ability ou None pour non-jeteur
     (E3), abilities {str/dex/con/int/wis/cha: score brut} (Medium), skills
     {nom: {rank, class_skill, armor_penalty}} uniquement rank > 0 (Medium),
-    metamagic_feats (tuple trié), weapon_damage {weapon_id: dégâts courants},
+    metamagic_feats (tuple trié), weapon_damage {weapon_id: dégâts cumulés au-delà de la dureté},
     summon_duration (int ou None), immediate_used, deed_up_close_and_deadly
     (flags actuels), active_buffs {source, rounds_left, mods: tuple de
     {target, value, bonus_type}} (E5), speed_land_ft, speed_fly_ft,
@@ -1710,8 +1727,9 @@ Règles modélisées :
     en pieds), ac {total,
     touch, flat_footed}, saves {fort, ref, will}, cmb, cmd, attacks
     (référentiel complet : id, name, kind, attack_bonus, damage, damage_bonus,
-    crit_range, crit_mult, reach_ft, range_increment_ft, count, firearm —
-    y compris les armes broken/stolen), features (noms des capacités),
+    crit_range, crit_mult, reach_ft, range_increment_ft, count, firearm,
+    hardness, hit_points (stats d'objet effectives, Table 7-12) —
+    y compris les armes broken/destroyed/stolen), features (noms des capacités),
     feature_details (C4 : tuple de {name, category, source_detail, effects:
     tuple de {target, value, bonus_type, condition, weapon_filter}}),
     spells (résumés enrichis du registre : name, level, school, range_ft,

src/pf1e_simulator/combat.py

@@ -190,7 +190,8 @@ _FLANK_BONUS = 2  # PF1e: +2 melee attack when ally threatens opposite side
 _HIGH_GROUND_BONUS = 1  # PF1e: +1 melee attack when attacker stands higher than target
 _ITERATIVE_PENALTY = 5  # PF1e: each BAB iterative is at -5 from the previous
 _MAX_ITERATIVES = 4  # PF1e: BAB +16 gives 4 attacks (at +16, +11, +6, +1)
-_WEAPON_DURABILITY = 10  # Accumulated sunder damage that destroys a weapon.
+_BROKEN_WEAPON_PENALTY = -2  # PF1e (CRB "Broken"): -2 attack and damage rolls
+_BROKEN_CRIT_MULT = 2  # PF1e (CRB "Broken"): broken weapons deal only x2 on a crit
 _CHARGE_ATTACK_BONUS = 2  # PF1e: +2 attack roll on a charge
 _CHARGE_AC_PENALTY = 2  # PF1e: -2 AC until start of next turn after charging
 _CHARGE_MIN_CELLS = 2  # PF1e: charge must move at least 10 ft (2 squares)
@@ -840,10 +841,16 @@ class CombatantState:
     swift_used_this_turn: bool = False
     summon_duration: int = 0
     summon_caster_id: str | None = None
-    # Runtime weapon durability (not in the frozen data model): accumulated
-    # sunder damage per weapon id, and the set of weapon ids rendered unusable.
+    # Runtime weapon durability (not in the frozen data model): damage dealt
+    # PAST the object's hardness per weapon id (CRB "Breaking and Entering":
+    # "Only damage in excess of its hardness is deducted from the object's
+    # hit points"), the set of weapon ids with the broken condition (usable
+    # at -2 with restricted crits — CRB "Broken"), and the set of weapon ids
+    # destroyed by a sunder (hp <= 0: "When an object's hit points reach 0,
+    # it's ruined" — unusable).
     weapon_damage: dict[str, int] = field(default_factory=dict)
     weapon_broken: set[str] = field(default_factory=set)
+    weapon_destroyed: set[str] = field(default_factory=set)
     # Runtime weapon theft (not in the frozen data model): weapon ids taken by
     # steal maneuvers.
     weapon_stolen: set[str] = field(default_factory=set)
@@ -924,12 +931,23 @@ class CombatantState:
     held_charge: HeldCharge | None = None
 
     def usable_attacks(self) -> list[AttackSpec]:
+        # PF1e (CRB "Breaking Items" / "Conditions - Broken"): a broken
+        # weapon is still USABLE — it just suffers -2 on attack and damage
+        # rolls with crits restricted to natural 20 at x2 (applied in
+        # resolve_attack). Destroyed weapons (hp <= 0) are unusable.
+        # FIREARM EXCEPTION: a broken firearm (misfire, Ultimate Combat
+        # "Firearm Rules - Misfires") is kept unusable until Quick Clear or
+        # a repair — the SRD would let it fire at -2 with its misfire value
+        # raised by 4, but the misfire escalation and the exploding-early-
+        # firearm rules are not modeled, so re-firing a broken gun is
+        # represented as not possible (documented simplification).
         return [
             w
             for w in self.combatant.attacks
-            if w.id not in self.weapon_broken
+            if w.id not in self.weapon_destroyed
             and w.id not in self.weapon_stolen
             and w.id not in self.weapon_dropped
+            and not (w.id in self.weapon_broken and w.firearm)
         ]
 
     def occupied_cells(self) -> frozenset[Pos]:
@@ -1634,6 +1652,7 @@ class CombatEngine:
             "conditions": conditions,
             "resources_left": resources,
             "weapon_broken": tuple(sorted(state.weapon_broken)),
+            "weapon_destroyed": tuple(sorted(state.weapon_destroyed)),
             "weapon_stolen": tuple(sorted(state.weapon_stolen)),
             "weapon_dropped": tuple(sorted(state.weapon_dropped)),
             "grappled_with": state.grappled_with,
@@ -1761,6 +1780,8 @@ class CombatEngine:
                     "range_increment_ft": attack.range_increment_ft,
                     "count": attack.count,
                     "firearm": attack.firearm,
+                    "hardness": attack.object_stats()[0],
+                    "hit_points": attack.object_stats()[1],
                 }
                 for attack in state.combatant.attacks
             ),
@@ -3112,6 +3133,11 @@ class CombatEngine:
             else 0
         )
         base_bonus = bonus_override if bonus_override is not None else weapon.attack_bonus
+        # PF1e (CRB "Conditions - Broken"): "If the item is a weapon, any
+        # attacks made with the item suffer a -2 penalty on attack and
+        # damage rolls. Such weapons only score a critical hit on a natural
+        # 20 and only deal x2 damage on a confirmed critical hit."
+        broken = weapon.id in attacker.weapon_broken
         fim_penalty = (
             self._firing_into_melee_penalty(attacker, target)
             if self._is_ranged_attack(weapon)
@@ -3149,6 +3175,7 @@ class CombatEngine:
         total = (
             roll + base_bonus + penalty + flank + high_ground + attack_roll_mod - pa_amt
             + fim_penalty + fd_penalty + attacker.aid_attack_bonus
+            + (_BROKEN_WEAPON_PENALTY if broken else 0)
         )
         # Check if target denies DEX to AC (flat-footed); a running target
         # loses its DEX bonus too (U5e), reusing the same AC path — unless it
@@ -3160,6 +3187,55 @@ class CombatEngine:
             or self._running_denies_dex(target)
             or self._has_condition_named(attacker, "invisible")
         )
+        ac = self._attack_ac(attacker, target, weapon, dist_ft, denies_dex=denies_dex)
+        hit = roll == _NATURAL_TWENTY or (roll != _NATURAL_ONE and total >= ac)
+        # PF1e (Ultimate Combat, Firearm Rules — Misfires): "If the natural
+        # result of your attack roll falls within a firearm's misfire value,
+        # that shot misses [...] When a firearm misfires, it gains the broken
+        # condition." The model uses the minimum misfire value (1): a natural
+        # 1 with a firearm (``firearm: true``) breaks the weapon — it joins
+        # ``weapon_broken`` and is unusable until Quick Clear or a repair.
+        # Bounded to firearms; the exploding-early-firearm and increased
+        # misfire-value rules are not modeled (a broken gun cannot be fired
+        # again here, so it cannot misfire twice).
+        if weapon.firearm and roll == _NATURAL_ONE:
+            attacker.weapon_broken.add(weapon.id)
+            self._log(
+                f"round {self._current_round} {attacker.combatant.id}: "
+                f"{weapon.name} MISFIRE (broken)"
+            )
+        damage = 0
+        concealment_miss = False
+        crit = False
+        if hit:
+            crit, concealment_miss, damage = self._resolve_hit_damage(
+                attacker, target, weapon, roll=roll, ac=ac, base_bonus=base_bonus,
+                penalty=penalty, flank=flank, high_ground=high_ground,
+                attack_mod=attack_mod, pa_amt=pa_amt, fim_penalty=fim_penalty,
+                dist_ft=dist_ft, denies_dex=denies_dex, broken=broken,
+            )
+        if not concealment_miss:
+            self._lose_hp(target, damage)
+            damage = self._consume_up_close_and_deadly(
+                attacker, target, weapon, dist_ft, damage, hit=hit
+            )
+        attacker.aid_attack_bonus = 0
+        return AttackResult(
+            hit=hit, crit=crit, damage=damage, roll=roll, total=total, ac=ac,
+            penalty=penalty, flank_bonus=flank, high_ground_bonus=high_ground,
+            base_bonus=base_bonus, melee_penalty=fim_penalty,
+        )
+
+    def _attack_ac(
+        self,
+        attacker: CombatantState,
+        target: CombatantState,
+        weapon: AttackSpec,
+        dist_ft: int,
+        *,
+        denies_dex: bool,
+    ) -> int:
+        """Effective AC of ``target`` against this attack (modifiers + cover)."""
         full_ac_base = (
             target.combatant.ac.flat_footed
             if denies_dex
@@ -3193,43 +3269,7 @@ class CombatEngine:
         ac += self._attack_cover_bonus(
             attacker, target, ranged=self._is_ranged_attack(weapon)
         )
-        hit = roll == _NATURAL_TWENTY or (roll != _NATURAL_ONE and total >= ac)
-        # PF1e (Ultimate Combat, Firearm Rules — Misfires): "If the natural
-        # result of your attack roll falls within a firearm's misfire value,
-        # that shot misses [...] When a firearm misfires, it gains the broken
-        # condition." The model uses the minimum misfire value (1): a natural
-        # 1 with a firearm (``firearm: true``) breaks the weapon — it joins
-        # ``weapon_broken`` and is unusable until Quick Clear or a repair.
-        # Bounded to firearms; the exploding-early-firearm and increased
-        # misfire-value rules are not modeled (a broken gun cannot be fired
-        # again here, so it cannot misfire twice).
-        if weapon.firearm and roll == _NATURAL_ONE:
-            attacker.weapon_broken.add(weapon.id)
-            self._log(
-                f"round {self._current_round} {attacker.combatant.id}: "
-                f"{weapon.name} MISFIRE (broken)"
-            )
-        damage = 0
-        concealment_miss = False
-        crit = False
-        if hit:
-            crit, concealment_miss, damage = self._resolve_hit_damage(
-                attacker, target, weapon, roll=roll, ac=ac, base_bonus=base_bonus,
-                penalty=penalty, flank=flank, high_ground=high_ground,
-                attack_mod=attack_mod, pa_amt=pa_amt, fim_penalty=fim_penalty,
-                dist_ft=dist_ft, denies_dex=denies_dex,
-            )
-        if not concealment_miss:
-            self._lose_hp(target, damage)
-            damage = self._consume_up_close_and_deadly(
-                attacker, target, weapon, dist_ft, damage, hit=hit
-            )
-        attacker.aid_attack_bonus = 0
-        return AttackResult(
-            hit=hit, crit=crit, damage=damage, roll=roll, total=total, ac=ac,
-            penalty=penalty, flank_bonus=flank, high_ground_bonus=high_ground,
-            base_bonus=base_bonus, melee_penalty=fim_penalty,
-        )
+        return ac
 
     def _resolve_hit_damage(
         self,
@@ -3248,6 +3288,7 @@ class CombatEngine:
         fim_penalty: int,
         dist_ft: int,
         denies_dex: bool,
+        broken: bool = False,
     ) -> tuple[bool, bool, int]:
         """Resolve a successful attack roll: crit confirm, concealment miss
         chance, sneak attack dice, then damage (PF1e order).
@@ -3259,8 +3300,15 @@ class CombatEngine:
         the confirmation roll.
         """
         crit = False
-        threat_range = weapon.crit_range
-        if self._has_feat(attacker, _IMPROVED_CRITICAL_FEATURE):
+        # CRB "Broken": a broken weapon "only score[s] a critical hit on a
+        # natural 20" — the threat range collapses to 20 and Improved
+        # Critical cannot widen it (a broken weapon is not being wielded to
+        # its full effect).
+        threat_range = _NATURAL_TWENTY if broken else weapon.crit_range
+        if (
+            not broken
+            and self._has_feat(attacker, _IMPROVED_CRITICAL_FEATURE)
+        ):
             threat_range = _CRIT_RANGE_BASE - 2 * (_CRIT_RANGE_BASE - weapon.crit_range)
         if roll != _NATURAL_ONE and roll >= threat_range:
             confirm = self._rng.d20()
@@ -3268,6 +3316,7 @@ class CombatEngine:
                 confirm + base_bonus + penalty + flank + high_ground
                 + attack_mod - pa_amt + fim_penalty + attacker.aid_attack_bonus
                 + (_FIGHT_DEFENSIVELY_ATTACK_PENALTY if attacker.fight_defensively else 0)
+                + (_BROKEN_WEAPON_PENALTY if broken else 0)
             )
             # PF1e (CRB): the confirmation roll is an attack roll — a natural
             # 20 on it is an automatic hit (auto-confirm), a natural 1 miss.
@@ -3322,6 +3371,10 @@ class CombatEngine:
         energy_dice = sum(rolls) - physical_dice
         damage = physical_dice + weapon.damage_bonus
         damage += resolve_modifiers(dmg_mods)
+        # CRB "Broken": the -2 rides the damage roll too (applied before the
+        # multiplier, like every other flat damage modifier).
+        if broken:
+            damage += _BROKEN_WEAPON_PENALTY
         # PF1e (CRB Power Attack): +2X damage with a melee weapon, +3X (the
         # bonus increased by half) with a two-handed weapon, a one-handed
         # weapon used in two hands, or a primary natural with 1.5x Strength
@@ -3334,7 +3387,9 @@ class CombatEngine:
         if weapon.kind == "melee":
             damage += pa_amt * (3 if weapon.two_handed else 2)
         if crit:
-            damage *= weapon.crit_mult
+            # CRB "Broken": a broken weapon "only deal[s] x2 damage on a
+            # confirmed critical hit" even if its multiplier is higher.
+            damage *= _BROKEN_CRIT_MULT if broken else weapon.crit_mult
         damage += sneak_total + energy_dice
         # PF1e (CRB Damage Reduction): "Damage reduction does not negate ...
         # energy damage dealt along with an attack" — DR reduces only the
@@ -5417,9 +5472,8 @@ class CombatEngine:
         """Repair a broken weapon: remove it from ``weapon_broken`` and reset damage.
 
         No-op (with a log line) when ``weapon_id`` is None or the weapon was never
-        damaged. Also removes the transient ``disarmed`` condition originating
-        from the sunder that broke the weapon, so the repaired weapon is fully
-        usable again.
+        damaged. A DESTROYED weapon (hp <= 0, "ruined" per CRB "Smashing an
+        Object") cannot be repaired by this action.
         """
         if weapon_id is None:
             self._log(
@@ -5427,6 +5481,12 @@ class CombatEngine:
                 f"repair: nothing to repair"
             )
             return
+        if weapon_id in state.weapon_destroyed:
+            self._log(
+                f"round {self._current_round} {state.combatant.id}: "
+                f"repair {weapon_id}: weapon destroyed"
+            )
+            return
         if weapon_id not in state.weapon_damage:
             self._log(
                 f"round {self._current_round} {state.combatant.id}: "
@@ -5435,10 +5495,6 @@ class CombatEngine:
             return
         state.weapon_damage.pop(weapon_id, None)
         state.weapon_broken.discard(weapon_id)
-        state.active_conditions = [
-            c for c in state.active_conditions
-            if not (c.condition.name == "disarmed" and c.source == "maneuver: sunder")
-        ]
         self._log(
             f"round {self._current_round} {state.combatant.id}: "
             f"repair {weapon_id} (restored)"
@@ -5623,39 +5679,66 @@ class CombatEngine:
         if not m.success:
             self._maneuver_fail(state, target, "sunder", m)
             return
-        weapon = next((w for w in target.usable_attacks() if w.kind == "melee"), None)
-        if weapon is None:
-            self._log(
-                f"round {self._current_round} {state.combatant.id}: sunder vs "
-                f"{target.combatant.id} d20={m.roll}+{m.attacker_cmb}={m.total} "
-                f"CMD {m.target_cmd} -> SUCCESS (no weapon to damage)"
-            )
-            return
-        dmg = state.combatant.abilities.str_mod + 2
-        target.weapon_damage[weapon.id] = target.weapon_damage.get(weapon.id, 0) + dmg
-        if target.weapon_damage[weapon.id] >= _WEAPON_DURABILITY:
-            target.weapon_broken.add(weapon.id)
-            target.active_conditions.append(
-                ActiveCondition(
-                    condition=Condition(
-                        name="disarmed",
-                        modifiers=(StatModifier(target="attack", value=-4),),
+        # PF1e (SRD Sunder): "you can attempt to sunder an item held or worn
+        # by your opponent" — a natural weapon is not an item, so only
+        # manufactured melee weapons can be targeted.
+        weapon = next(
+            (
+                w
+                for w in target.usable_attacks()
+                if w.kind == "melee" and not w.natural
             ),
-                    rounds_left=1,
-                    source="maneuver: sunder",
+            None,
         )
-            )
-            self._log(
+        prefix = (
             f"round {self._current_round} {state.combatant.id}: sunder vs "
             f"{target.combatant.id} d20={m.roll}+{m.attacker_cmb}={m.total} "
-                f"CMD {m.target_cmd} -> SUCCESS (weapon destroyed)"
+            f"CMD {m.target_cmd}"
+        )
+        if weapon is None:
+            self._log(f"{prefix} -> SUCCESS (no weapon to damage)")
+            return
+        # PF1e (SRD Sunder): "If your attack is successful, you deal damage
+        # to the item normally" — the attacker's melee weapon damage (physical
+        # components only; objects are immune to energy per CRB "Smashing an
+        # Object" energy rules, which are out of scope). A broken attacker
+        # weapon deals -2 (CRB "Broken").
+        striker = next((w for w in state.usable_attacks() if w.kind == "melee"), None)
+        raw = 0
+        if striker is not None:
+            raw = sum(
+                comp.formula.roll(self._rng)
+                for comp in striker.damage
+                if _PHYSICAL_DAMAGE_TYPES.issuperset(comp.types)
+            ) + striker.damage_bonus
+            if striker.id in state.weapon_broken:
+                raw += _BROKEN_WEAPON_PENALTY
+        # PF1e (CRB "Smashing an Object"): "subtract its hardness from the
+        # damage. Only damage in excess of its hardness is deducted from the
+        # object's hit points."
+        hardness, max_hp = weapon.object_stats()
+        dealt = max(0, raw - hardness)
+        accumulated = target.weapon_damage.get(weapon.id, 0) + dealt
+        target.weapon_damage[weapon.id] = accumulated
+        hp_left = max_hp - accumulated
+        if hp_left <= 0:
+            # SRD Sunder: "If the damage you deal would reduce the object to
+            # less than 0 hit points, you can choose to destroy it" — the
+            # engine always takes the destructive option (no choice payload
+            # on Action; documented simplification).
+            target.weapon_broken.discard(weapon.id)
+            target.weapon_destroyed.add(weapon.id)
+            self._log(f"{prefix} -> SUCCESS (weapon destroyed)")
+            return
+        if hp_left * 2 <= max_hp:
+            # SRD Sunder: "If an object has equal to or less than half its
+            # total hit points remaining, it gains the broken condition."
+            target.weapon_broken.add(weapon.id)
+            self._log(
+                f"{prefix} -> SUCCESS ({dealt} damage to weapon, broken)"
             )
             return
-        self._log(
-            f"round {self._current_round} {state.combatant.id}: sunder vs "
-            f"{target.combatant.id} d20={m.roll}+{m.attacker_cmb}={m.total} "
-            f"CMD {m.target_cmd} -> SUCCESS ({dmg} damage to weapon)"
-        )
+        self._log(f"{prefix} -> SUCCESS ({dealt} damage to weapon)")
 
     def _nearest_anchor_adjacent_to(
         self, grappler: CombatantState, target: CombatantState

src/pf1e_simulator/models.py

@@ -232,6 +232,11 @@ class DamageComponent(_FrozenModel):
         return value
 
 
+_HAFTED_WEAPON_TOKENS: tuple[str, ...] = (
+    "axe", "spear", "hammer", "mace", "flail", "staff", "pick", "javelin",
+)
+
+
 class AttackSpec(_FrozenModel):
     """One attack menu entry (weapon or natural attack).
 
@@ -254,6 +259,13 @@ class AttackSpec(_FrozenModel):
     weapons. `secondary` marks a secondary natural attack (tail, wing, etc.):
     the engine applies -5 to the attack bonus (reduced to -2 with the
     Multiattack feat).
+
+    Object statistics (CRB "Breaking and Entering", Table 7-12): `hardness`
+    and `hit_points` are authorable overrides; when absent the engine
+    derives them from the weapon class via `object_stats()`. `enhancement`
+    is the weapon's enhancement bonus (0 = masterwork or plain); each +1
+    adds +2 hardness and +10 hit points (CRB "Magic Armor, Shields, and
+    Weapons").
     """
 
     id: str
@@ -272,6 +284,34 @@ class AttackSpec(_FrozenModel):
     two_handed: bool = False
     natural: bool = False
     secondary: bool = False
+    hardness: int | None = Field(default=None, ge=0)
+    hit_points: int | None = Field(default=None, ge=1)
+    enhancement: int = Field(default=0, ge=0, le=20)
+
+    def object_stats(self) -> tuple[int, int]:
+        """Hardness and hit points of the weapon as an OBJECT (Medium item).
+
+        Defaults from CRB Table 7-12 "Common Armor, Weapon, and Shield
+        Hardness and Hit Points" when not authored: projectile weapons 5/5;
+        hafted weapons (wooden haft: axe, spear, hammer, mace, flail,
+        staff, pick, javelin) hardness 5, 5 hp one-handed / 10 hp
+        two-handed; blades steel hardness 10, 5 hp one-handed / 10 hp
+        two-handed. The light/one-handed granularity is collapsed to
+        one-handed (the model has no weapon-weight field). Enhancement
+        adds +2 hardness and +10 hp per +1 (footnotes 1 and 3).
+        """
+        if self.kind == "ranged" or self.firearm:
+            base_hardness, base_hp = 5, 5
+        elif any(token in self.name.lower() for token in _HAFTED_WEAPON_TOKENS):
+            base_hardness, base_hp = 5, (10 if self.two_handed else 5)
+        else:
+            base_hardness, base_hp = 10, (10 if self.two_handed else 5)
+        hardness = self.hardness if self.hardness is not None else base_hardness
+        hit_points = self.hit_points if self.hit_points is not None else base_hp
+        return (
+            hardness + 2 * self.enhancement,
+            hit_points + 10 * self.enhancement,
+        )
 
 
 class DamageReduction(_FrozenModel):

tests/test_maneuvers.py

@@ -1,8 +1,11 @@
 """Tests for combat maneuvers, focused on the sunder result.
 
-A successful sunder damages the defender's WEAPON, never its HP. Repeated
-sunders can destroy the weapon, after which the defender can no longer use
-it (effectively disarmed). See the plan task-12.
+A successful sunder damages the defender's WEAPON as an OBJECT (SRD Sunder /
+CRB "Smashing an Object"): the attacker's weapon damage, less the object's
+Hardness, is subtracted from its hit points. At half hp or less the weapon
+gains the broken condition (still usable at -2 attack/damage, crits only on
+a natural 20 at x2 - CRB "Broken"); at 0 hp or less it is destroyed and
+unusable.
 """
 
 from __future__ import annotations
@@ -53,6 +56,24 @@ def make_combatant(
     )
 
 
+def make_object_combatant(
+    cid: str, *, hardness: int, hit_points: int, attack_bonus: int = 2
+) -> Combatant:
+    """Combatant whose sword carries authored object stats (Table 7-12
+    overrides) so sunder outcomes are scripted exactly."""
+    attack = AttackSpec(
+        id=f"{cid}-w",
+        name="sword",
+        kind="melee",
+        attack_bonus=attack_bonus,
+        damage=[DamageComponent(formula="1d4", types=["slashing"])],
+        hardness=hardness,
+        hit_points=hit_points,
+    )
+    base = make_combatant(cid, attack_bonus=attack_bonus)
+    return base.model_copy(update={"attacks": [attack]})
+
+
 def make_state(combatant: Combatant, side: str, pos: tuple[int, int]) -> CombatantState:
     return CombatantState(combatant=combatant, side=side, pos=pos, hp=combatant.hp_max)
 
@@ -72,32 +93,152 @@ def make_engine(
     return CombatEngine(ScriptedRng(queue), make_grid(), states)
 
 
+def test_object_stats_default_from_table_7_12() -> None:
+    # CRB Table 7-12 defaults by weapon class (Medium, unenhanced): steel
+    # blade 10/5 (one-handed) and 10/10 (two-handed); wooden hafted 5/5 and
+    # 5/10; projectile weapon 5/5. Enhancement: +2 hardness and +10 hp per
+    # +1 (footnotes 1 and 3).
+    def _spec(**kw: object) -> AttackSpec:
+        base: dict[str, object] = {
+            "id": "w", "name": "sword", "kind": "melee", "attack_bonus": 0,
+            "damage": [DamageComponent(formula="1d8", types=["slashing"])],
+        }
+        base.update(kw)
+        return AttackSpec(**base)
+
+    assert _spec().object_stats() == (10, 5)
+    assert _spec(two_handed=True).object_stats() == (10, 10)
+    assert _spec(name="waraxe").object_stats() == (5, 5)
+    assert _spec(name="waraxe", two_handed=True).object_stats() == (5, 10)
+    assert _spec(name="short bow", kind="ranged").object_stats() == (5, 5)
+    assert _spec(enhancement=2).object_stats() == (14, 25)
+    # Authored overrides replace the class default.
+    assert _spec(hardness=0, hit_points=4).object_stats() == (0, 4)
+
+
 def test_sunder_damages_weapon_not_hp() -> None:
-    a_spec = make_combatant("a", attack_bonus=2)
-    b_spec = make_combatant("b")
-    a = make_state(a_spec, "players", (1, 1))
-    b = make_state(b_spec, "monsters", (1, 2))
+    # SRD Sunder / CRB "Smashing an Object": the sunder deals the attacker's
+    # weapon damage (1d4 scripted to 4), reduced by the object's Hardness
+    # (authored 2) -> 2 damage to the weapon's hit points, never to the
+    # defender's HP.
+    a = make_state(make_combatant("a", attack_bonus=2), "players", (1, 1))
+    b = make_state(
+        make_object_combatant("b", hardness=2, hit_points=10), "monsters", (1, 2)
+    )
     hp_before = b.hp
-    engine = make_engine([1, 12], [a, b])
+    engine = make_engine([1, 12, 4], [a, b])  # AoO miss, CMB 12, 1d4 -> 4
     engine._execute_maneuver(a, b, "sunder")
     assert b.hp == hp_before
     assert b.weapon_damage["b-w"] == 2
     assert "b-w" not in b.weapon_broken
+    assert "b-w" not in b.weapon_destroyed
 
 
-def test_sunder_destroys_weapon_and_disarms() -> None:
-    a_spec = make_combatant("a", attack_bonus=2)
-    b_spec = make_combatant("b")
-    a = make_state(a_spec, "players", (1, 1))
-    b = make_state(b_spec, "monsters", (1, 2))
-    # Only the first sunder provokes: b's per-round AoO allowance is spent.
-    engine = make_engine([1, 12, 12, 12, 12, 12], [a, b])
-    for _ in range(5):
+def test_sunder_hardness_absorbs_small_damage() -> None:
+    # A plain steel blade is hardness 10 (Table 7-12): a 1d4 (max 4) sunder
+    # cannot scratch it — 0 damage past hardness.
+    a = make_state(make_combatant("a", attack_bonus=2), "players", (1, 1))
+    b = make_state(make_combatant("b"), "monsters", (1, 2))
+    engine = make_engine([1, 12, 4], [a, b])
+    engine._execute_maneuver(a, b, "sunder")
+    assert b.weapon_damage["b-w"] == 0
+    assert "b-w" not in b.weapon_broken
+
+
+def test_sunder_breaks_weapon_at_half_hit_points() -> None:
+    # SRD Sunder: "If an object has equal to or less than half its total hit
+    # points remaining, it gains the broken condition." hardness 0, 10 hp;
+    # 1d4+3 scripted to 4+3=7 -> 3 hp left <= 5 -> broken. The broken weapon
+    # STAYS usable (CRB "Broken").
+    a_spec = make_combatant("a", attack_bonus=2).model_copy(
+        update={"attacks": [
+            AttackSpec(
+                id="a-w", name="sword", kind="melee", attack_bonus=2,
+                damage=[DamageComponent(formula="1d4", types=["slashing"])],
+                damage_bonus=3,
+            )
+        ]}
+    )
+    a = make_state(a_spec, "players", (1, 1))
+    b = make_state(
+        make_object_combatant("b", hardness=0, hit_points=10), "monsters", (1, 2)
+    )
+    engine = make_engine([1, 12, 4], [a, b])
     engine._execute_maneuver(a, b, "sunder")
-    assert b.hp == 6
     assert "b-w" in b.weapon_broken
+    assert "b-w" not in b.weapon_destroyed
+    assert [w.id for w in b.usable_attacks()] == ["b-w"]
+    assert engine.weapon_for(b, a) is not None
+    assert "broken" in engine._transcript[-1]
+
+
+def test_sunder_destroys_weapon_at_zero_hit_points() -> None:
+    # CRB "Smashing an Object": "When an object's hit points reach 0, it's
+    # ruined." Two sunders of 7 (hardness 0, 10 hp): broken after the first,
+    # destroyed after the second — then unusable.
+    a_spec = make_combatant("a", attack_bonus=2).model_copy(
+        update={"attacks": [
+            AttackSpec(
+                id="a-w", name="sword", kind="melee", attack_bonus=2,
+                damage=[DamageComponent(formula="1d4", types=["slashing"])],
+                damage_bonus=3,
+            )
+        ]}
+    )
+    a = make_state(a_spec, "players", (1, 1))
+    b = make_state(
+        make_object_combatant("b", hardness=0, hit_points=10), "monsters", (1, 2)
+    )
+    engine = make_engine([1, 12, 4, 12, 4], [a, b])
+    engine._execute_maneuver(a, b, "sunder")  # first: AoO provokes (nat 1)
+    assert "b-w" in b.weapon_broken
+    engine._execute_maneuver(a, b, "sunder")  # b's AoO allowance is spent
+    assert "b-w" in b.weapon_destroyed
+    assert "b-w" not in b.weapon_broken
+    assert [w.id for w in b.usable_attacks()] == []
     assert engine.weapon_for(b, a) is None
-    assert any(c.condition.name == "disarmed" for c in b.active_conditions)
+    assert "weapon destroyed" in engine._transcript[-1]
+
+
+def test_broken_weapon_still_attacks_at_minus_two() -> None:
+    # CRB "Broken": "any attacks made with the item suffer a -2 penalty on
+    # attack and damage rolls."
+    b = make_state(make_combatant("b"), "monsters", (1, 2))
+    a = make_state(make_combatant("a", attack_bonus=2), "players", (1, 1))
+    engine = make_engine([10], [a, b])
+    result = engine.resolve_attack(a, b, a.combatant.attacks[0])
+    assert result.total == 10 + 2  # intact baseline
+    b.weapon_broken.add("b-w")
+    engine2 = make_engine([10], [a, b])
+    result2 = engine2.resolve_attack(b, a, b.combatant.attacks[0])
+    assert result2.total == 10 + 2 - 2
+    assert result2.hit is False  # 10 vs AC 13: the -2 turns the hit into a miss
+
+
+def test_broken_weapon_crits_only_on_natural_twenty_at_x2() -> None:
+    # CRB "Broken": "Such weapons only score a critical hit on a natural 20
+    # and only deal x2 damage on a confirmed critical hit." The sword
+    # threatens 19-20 at x3 when intact.
+    sharp = AttackSpec(
+        id="c-w", name="sword", kind="melee", attack_bonus=2,
+        damage=[DamageComponent(formula="1d4", types=["slashing"])],
+        crit_range=19, crit_mult=3,
+    )
+    c = make_state(
+        make_combatant("c").model_copy(update={"attacks": [sharp]}), "players", (1, 1)
+    )
+    d = make_state(make_combatant("d"), "monsters", (1, 2))
+    c.weapon_broken.add("c-w")
+    # Natural 19: no threat at all with a broken weapon (no confirm roll).
+    engine = make_engine([19, 4], [c, d])
+    result = engine.resolve_attack(c, d, sharp)
+    assert result.crit is False
+    # Natural 20: threatens, auto-confirms (natural 20), x2 (not x3):
+    # (1d4=4 - 2 broken) * 2 = 4.
+    engine = make_engine([20, 20, 4], [c, d])
+    result = engine.resolve_attack(c, d, sharp)
+    assert result.crit is True
+    assert result.damage == 4
 
 
 def test_escape_from_grapple_consumes_single_d20() -> None:

tests/test_repair_weapon.py

@@ -3,9 +3,9 @@
 L8 of the ``llm-policy-contract`` plan: ``Action`` gains a ``repair_weapon``
 kind (reusing the existing ``weapon_id`` field) so a policy can restore a
 weapon that a sunder maneuver broke. The weapon is removed from
-``state.weapon_broken``, its accumulated damage is reset, and the transient
-``disarmed`` condition originating from the sunder is removed so the repaired
-weapon is fully usable again via ``usable_attacks()``.
+``state.weapon_broken``, its accumulated damage is reset, and the weapon is
+fully usable again via ``usable_attacks()``. A weapon DESTROYED by a sunder
+(hp <= 0) cannot be repaired.
 
 No default policy emits ``repair_weapon``; it is only accepted by ``_execute``
 (usage via custom policy / LLM).
@@ -14,8 +14,6 @@ No default policy emits ``repair_weapon``; it is only accepted by ``_execute``
 from __future__ import annotations
 
 from pf1e_simulator.combat import Action, CombatantState, CombatEngine
-from pf1e_simulator.conditions import Condition
-from pf1e_simulator.effects import ActiveCondition, StatModifier
 from pf1e_simulator.grid import Grid
 from pf1e_simulator.map import MapSpec, TerrainType
 from pf1e_simulator.models import (
@@ -56,6 +54,37 @@ def make_combatant(cid: str, *, attack_bonus: int = 2) -> Combatant:
     )
 
 
+def _soft_sword_combatant(cid: str, *, attack_bonus: int = 2) -> Combatant:
+    """Combatant with a authored soft sword (hardness 0, 10 hp) so one
+    scripted 1d4+3 sunder breaks it."""
+    attack = AttackSpec(
+        id=f"{cid}-w",
+        name="sword",
+        kind="melee",
+        attack_bonus=attack_bonus,
+        damage=[DamageComponent(formula="1d4", types=["slashing"])],
+        hardness=0,
+        hit_points=10,
+    )
+    return make_combatant(cid, attack_bonus=attack_bonus).model_copy(
+        update={"attacks": [attack]}
+    )
+
+
+def _heavy_striker(cid: str) -> Combatant:
+    attack = AttackSpec(
+        id=f"{cid}-w",
+        name="sword",
+        kind="melee",
+        attack_bonus=2,
+        damage=[DamageComponent(formula="1d4", types=["slashing"])],
+        damage_bonus=3,
+    )
+    return make_combatant(cid, attack_bonus=2).model_copy(
+        update={"attacks": [attack]}
+    )
+
+
 def make_state(combatant: Combatant, side: str, pos: tuple[int, int]) -> CombatantState:
     return CombatantState(combatant=combatant, side=side, pos=pos, hp=combatant.hp_max)
 
@@ -74,17 +103,6 @@ def _weapon_ids(state: CombatantState) -> list[str]:
     return [w.id for w in state.usable_attacks()]
 
 
-def _sunder_disarmed_condition() -> ActiveCondition:
-    return ActiveCondition(
-        condition=Condition(
-            name="disarmed",
-            modifiers=(StatModifier(target="attack", value=-4),),
-        ),
-        rounds_left=1,
-        source="maneuver: sunder",
-    )
-
-
 # --- Test 1: repair restores a broken weapon ---------------------------------
 
 def test_repair_restores_broken_weapon() -> None:
@@ -94,16 +112,11 @@ def test_repair_restores_broken_weapon() -> None:
     b = make_state(b_spec, "monsters", (1, 2))
     b.weapon_damage = {"b-w": 10}
     b.weapon_broken = {"b-w"}
-    b.active_conditions.append(_sunder_disarmed_condition())
     engine = make_engine([], [a, b])
     engine._execute(b, Action(kind="repair_weapon", weapon_id="b-w"))
     assert not b.weapon_broken
     assert not b.weapon_damage
     assert "b-w" in _weapon_ids(b)
-    assert not any(
-        c.condition.name == "disarmed" and c.source == "maneuver: sunder"
-        for c in b.active_conditions
-    )
     assert "repair b-w (restored)" in engine._transcript[-1]
 
 
@@ -140,30 +153,40 @@ def test_repair_unknown_id_logs_nothing_to_repair() -> None:
 # --- Test 4: real sunder then repair restores the weapon ---------------------
 
 def test_sunder_then_repair_restores_weapon() -> None:
-    a_spec = make_combatant("a", attack_bonus=2)
-    b_spec = make_combatant("b")
-    a = make_state(a_spec, "players", (1, 1))
-    b = make_state(b_spec, "monsters", (1, 2))
-    engine = make_engine([1] + [12] * 5, [a, b])
-    for _ in range(5):
+    # a's 1d4+3 (scripted 4+3=7) vs b's soft sword (hardness 0, 10 hp):
+    # 3 hp left <= half -> broken (still usable at -2, CRB "Broken"); the
+    # repair action resets the damage and clears the condition.
+    a = make_state(_heavy_striker("a"), "players", (1, 1))
+    b = make_state(_soft_sword_combatant("b"), "monsters", (1, 2))
+    engine = make_engine([1, 12, 4], [a, b])
     engine._execute(a, Action(kind="maneuver", target_id="b", maneuver="sunder"))
     assert "b-w" in b.weapon_broken
-    assert "b-w" not in _weapon_ids(b)
-    assert any(
-        c.condition.name == "disarmed" and c.source == "maneuver: sunder"
-        for c in b.active_conditions
-    )
+    assert "b-w" in _weapon_ids(b)
     engine._execute(b, Action(kind="repair_weapon", weapon_id="b-w"))
     assert not b.weapon_broken
     assert not b.weapon_damage
     assert "b-w" in _weapon_ids(b)
-    assert not any(
-        c.condition.name == "disarmed" and c.source == "maneuver: sunder"
-        for c in b.active_conditions
-    )
     assert "repair b-w (restored)" in engine._transcript[-1]
 
 
+# --- Test 4b: a destroyed weapon cannot be repaired --------------------------
+
+def test_repair_destroyed_weapon_is_refused() -> None:
+    # CRB "Smashing an Object": hp <= 0 is "ruined" — repair_weapon is a
+    # no-op on destroyed weapons.
+    a_spec = make_combatant("a", attack_bonus=2)
+    b_spec = make_combatant("b")
+    a = make_state(a_spec, "players", (1, 1))
+    b = make_state(b_spec, "monsters", (1, 2))
+    b.weapon_damage = {"b-w": 10}
+    b.weapon_destroyed.add("b-w")
+    engine = make_engine([], [a, b])
+    engine._execute(b, Action(kind="repair_weapon", weapon_id="b-w"))
+    assert "b-w" in b.weapon_destroyed
+    assert b.weapon_damage == {"b-w": 10}
+    assert "weapon destroyed" in engine._transcript[-1]
+
+
 # --- Test 5: determinism -----------------------------------------------------
 
 def _run_with_repair() -> tuple[str, ...]:

tests/test_weapon_selection.py

@@ -2,10 +2,12 @@
 
 ``attack`` and ``full_attack`` accept ``Action.weapon_id`` — the id of one of
 the attacker's weapons. With it the engine strikes with THAT weapon instead of
-the ``weapon_for`` auto-selection; a choice that is unknown, broken, stolen,
-or unable to strike the target (out of reach / no line of effect) is rejected
-with ``weapon_unavailable`` and no attack is made. Without it, the
-auto-selection and the full-attack mechanics are byte-identical to before.
+the ``weapon_for`` auto-selection; a choice that is unknown, destroyed,
+stolen, dropped, or unable to strike the target (out of reach / no line of
+effect) is rejected with ``weapon_unavailable`` and no attack is made (a
+BROKEN melee weapon stays selectable — CRB "Broken" makes it usable at -2).
+Without it, the auto-selection and the full-attack mechanics are
+byte-identical to before.
 """
 from __future__ import annotations
 
@@ -133,15 +135,31 @@ def test_full_attack_without_choice_still_swings_all_melee_weapons() -> None:
     assert "shortsword vs foe d20=10+2=12" in joined
 
 
-# ── (b) broken weapon → weapon_unavailable ───────────────────────────────────
+# ── (b) broken / destroyed weapon selection ──────────────────────────────────
 
 
-def test_attack_with_broken_weapon_is_rejected() -> None:
-    eng, hero, foe = _duel([])  # empty script: any roll would raise
+def test_attack_with_broken_weapon_is_usable() -> None:
+    # CRB "Broken": a broken weapon is still usable — at -2 on attack and
+    # damage. The explicit choice is accepted: d20 10 + 2 - 2 = 10 vs AC 10
+    # -> HIT for 3 - 2 = 1 damage.
+    eng, hero, foe = _duel([10, 3])
     hero.weapon_broken.add("hero-short")
     result = eng._execute(
         hero, Action(kind="attack", target_id="foe", weapon_id="hero-short")
     )
+    assert result == ActionResult(kind="attack", ok=True, reason="ok")
+    assert "shortsword vs foe d20=10+2=10 AC 10 -> HIT 1 damage" in eng._transcript[-1]
+    assert foe.hp == 99
+
+
+def test_attack_with_destroyed_weapon_is_rejected() -> None:
+    # A destroyed weapon (hp <= 0, CRB "Smashing an Object": "ruined") is
+    # unusable: the explicit choice is rejected, no roll consumed.
+    eng, hero, foe = _duel([])  # empty script: any roll would raise
+    hero.weapon_destroyed.add("hero-short")
+    result = eng._execute(
+        hero, Action(kind="attack", target_id="foe", weapon_id="hero-short")
+    )
     assert result == ActionResult(
         kind="attack", ok=False, reason="weapon_unavailable"
     )
@@ -149,9 +167,9 @@ def test_attack_with_broken_weapon_is_rejected() -> None:
     assert foe.hp == 100
 
 
-def test_full_attack_with_broken_weapon_is_rejected() -> None:
+def test_full_attack_with_destroyed_weapon_is_rejected() -> None:
     eng, hero, foe = _duel([])
-    hero.weapon_broken.add("hero-short")
+    hero.weapon_destroyed.add("hero-short")
     result = eng._execute(
         hero, Action(kind="full_attack", target_id="foe", weapon_id="hero-short")
     )