fix(rules): cap reposition and drag by size category

PF1e (APG Reposition / Drag): "You can only reposition/drag an opponent
that is no more than one size category larger than you" — the same cap the
SRD puts on trip/bull rush/overrun. reposition and drag join
_SIZE_RESTRICTED_MANEUVERS, so a two-categories-larger target is rejected
outright (no roll, no AoO). README updated.

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

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

README.md

@@ -1023,12 +1023,14 @@ Règles modélisées :
    contact pris de dos ne ajoute pas son bonus de Dextérité (« A flat-footed
    creature does not add its Dexterity bonus to its CMD » — la pénalité de
    Dextérité, qui n'est pas un bonus, reste appliquée).
-   (SRD « Trip » / « Bull Rush » / « Overrun ») : « You can only [affect] an
-   opponent who is no more than one size category larger than you » — conformance
-   L8 : trip, bull_rush et overrun contre une cible de **deux catégories de
-   taille ou plus au-dessus** de l'attaquant sont illégaux (tentative refusée,
-   journalisée `rejected (target too large)`, aucun jet, pas d'AoO provoquée) ;
-   les autres manœuvres (disarm, sunder, grapple…) n'ont pas de limite de taille.
+    (SRD « Trip » / « Bull Rush » / « Overrun » ; APG « Reposition » / « Drag ») :
+    « You can only [affect/reposition/drag] an opponent [who is] no more than
+    one size category larger than you » — conformance
+    L8 : trip, bull_rush, overrun, reposition et drag contre une cible de
+    **deux catégories de taille ou plus au-dessus** de l'attaquant sont illégaux
+    (tentative refusée,
+    journalisée `rejected (target too large)`, aucun jet, pas d'AoO provoquée) ;
+    les autres manœuvres (disarm, sunder, grapple…) n'ont pas de limite de taille.
    trip → `prone` ; disarm → `disarmed` (−4 attaque) ; bull_rush → pousse la
    cible (direction sélectionnable via `Action.direction`) ; conformance L6
    (SRD « Bull Rush ») : la poussée vaut 5 ft plus « For every 5 by which

src/pf1e_simulator/combat.py

@@ -284,9 +284,12 @@ _SIZE_ORDER: tuple[str, ...] = (
     "gargantuan", "colossal",
 )
 
-# PF1e (SRD Trip / Bull Rush / Overrun): "You can only [affect] an opponent
-# who is no more than one size category larger than you."
-_SIZE_RESTRICTED_MANEUVERS: frozenset[str] = frozenset({"trip", "bull_rush", "overrun"})
+# PF1e (SRD Trip / Bull Rush / Overrun; APG Reposition / Drag): "You can only
+# [affect/reposition/drag] an opponent [who is] no more than one size category
+# larger than you."
+_SIZE_RESTRICTED_MANEUVERS: frozenset[str] = frozenset(
+    {"trip", "bull_rush", "overrun", "reposition", "drag"}
+)
 
 
 def _size_rank(size: str) -> int:
@@ -4001,9 +4004,10 @@ class CombatEngine:
             "overrun", "dirty_trick", "steal", "reposition", "drag",
         ):
             return
-        # PF1e (SRD Trip / Bull Rush / Overrun): "You can only [affect] an
-        # opponent who is no more than one size category larger than you."
-        # The attempt is illegal outright: no roll, no provoked AoO.
+        # PF1e (SRD Trip / Bull Rush / Overrun; APG Reposition / Drag): "You
+        # can only [affect] an opponent who is no more than one size category
+        # larger than you." The attempt is illegal outright: no roll, no
+        # provoked AoO.
         if maneuver in _SIZE_RESTRICTED_MANEUVERS and (
             _size_rank(target.combatant.size) - _size_rank(state.combatant.size)
             >= _MANEUVER_MAX_SIZE_DIFF

tests/test_maneuvers.py

@@ -249,16 +249,19 @@ def test_overrun_fail_adjacent_attacker_does_not_move() -> None:
 
 
 def test_maneuver_rejects_target_two_sizes_larger() -> None:
-    # SRD Trip/Bull Rush/Overrun: "You can only [affect] an opponent who is
-    # no more than one size category larger than you." Medium vs Huge: the
-    # attempt is illegal — no d20 consumed, no effect, logged rejection.
-    for maneuver in ("trip", "bull_rush", "overrun"):
+    # SRD Trip/Bull Rush/Overrun + APG Reposition/Drag: "You can only
+    # [affect/reposition/drag] an opponent who is no more than one size
+    # category larger than you." Medium vs Huge: the attempt is illegal — no
+    # d20 consumed, no effect, logged rejection.
+    for maneuver in ("trip", "bull_rush", "overrun", "reposition", "drag"):
         a = make_state(make_combatant("a", attack_bonus=2), "players", (1, 1))
         huge = make_state(_resized(make_combatant("h"), "Huge", 10, 10), "monsters", (1, 2))
         engine = make_engine([1, 12], [a, huge])
         engine._execute_maneuver(a, huge, maneuver)
         assert len(engine._rng._queue) == 2
         assert not any(c.condition.name == "prone" for c in huge.active_conditions)
+        assert huge.pos == (1, 2)  # reposition/drag must not move the target
+        assert a.pos == (1, 1)  # drag must not displace the attacker either
         assert f"{maneuver} vs h rejected (target too large)" in engine._transcript[-1]