fix(runner): disambiguation suffix skips ids already taken by explicit combatants

src/pf1e_simulator/runner.py

@@ -109,12 +109,16 @@ def _first_fit_anchor(
 def build_states(spec: EncounterSpec) -> list[CombatantState]:
     """Fresh states for one battle; duplicate combatant ids get -N suffixes.
 
+    The suffix keeps incrementing until the candidate id is not already
+    taken, so an explicit id like ``goblin-2`` never collides with a
+    disambiguated duplicate of ``goblin`` (the engine keys stats by id).
+
     Combatants of a side fill the zone's cells in (row, col) order. A side with
     more combatants than zone cells, or a zone with no cells, is a spec error.
     Creatures larger than 1x1 occupy an n x n footprint anchored at their cell.
     """
     states: list[CombatantState] = []
-    seen: dict[str, int] = {}
+    taken: set[str] = set()
     grid = Grid.from_spec(spec.map)
     for side in spec.sides:
         cells = zone_cells(spec.map, side.zone)
@@ -137,9 +141,12 @@ def build_states(spec: EncounterSpec) -> list[CombatantState]:
                         f"{combatant.id!r} ({combatant.size}, {n}x{n})"
                     )
                 raise ValueError(msg)
-            count = seen.get(combatant.id, 0) + 1
-            seen[combatant.id] = count
-            cid = combatant.id if count == 1 else f"{combatant.id}-{count}"
+            cid = combatant.id
+            suffix = 2
+            while cid in taken:
+                cid = f"{combatant.id}-{suffix}"
+                suffix += 1
+            taken.add(cid)
             effective = (
                 combatant
                 if cid == combatant.id