Only donate what the city uses; sell useless overflow

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

game.py

@@ -539,13 +539,31 @@ def bank_room(world: dict, player: dict, item: str) -> int:
     return max(0, stack_size(world) - have)
 
 
-def bank_add(world: dict, player: dict, item: str, qty: int, now: float, overflow: dict) -> int:
-    """Store what fits; the rest goes to the city (or is lost). Returns qty kept."""
+def city_uses(item: str) -> list[str]:
+    """What the city does with an item: the buildings that need it, the granary, the armoury."""
+    uses = [spec["name"] for spec in BUILDINGS.values()
+            if any(item in spec.get(key, {}) for key in ("base", "advanced", "late", "final"))]
+    spec = ITEMS[item]
+    if "food" in spec:
+        uses.append("the granary")
+    if spec.get("slot") in ("weapon", "shield") or item == "arrows":
+        uses.append("the armoury")
+    return uses
+
+
+def bank_add(world: dict, player: dict, item: str, qty: int, now: float, summary: dict) -> int:
+    """Store what fits; the rest goes to the city if it has a use, else is sold. Returns qty kept."""
     keep = min(qty, bank_room(world, player, item))
     if keep:
         player["bank"][item] = player["bank"].get(item, 0) + keep
     spill = qty - keep
-    if spill and player["overflow"] == "city":
+    if spill and player["overflow"] == "city" and not city_uses(item):
+        gold = int(spill * sell_price(world, item, now))
+        player["gold"] += gold
+        summary["sold"][item] = summary["sold"].get(item, 0) + spill
+        summary["sold_gold"] += gold
+    elif spill and player["overflow"] == "city":
+        overflow = summary["overflow"]
         stockpile = world["city"]["stockpile"]
         stockpile[item] = stockpile.get(item, 0) + spill
         gain = spill * ITEMS[item]["value"]
@@ -717,7 +735,7 @@ def _complete(world: dict, player: dict, action: dict, now: float, rng: random.R
             event["recon"] += action["recon"]
 
     for item, qty in outputs.items():
-        kept = bank_add(world, player, item, qty, now, summary["overflow"])
+        kept = bank_add(world, player, item, qty, now, summary)
         if kept:
             summary["items"][item] = summary["items"].get(item, 0) + kept
     gain_xp(world, player, action["skill"], xp, now, summary)
@@ -739,7 +757,8 @@ def gain_xp(world: dict, player: dict, skill: str, xp: float, now: float, summar
 
 def empty_summary() -> dict:
     return {"done": 0, "items": {}, "overflow": {}, "xp": {}, "levels": [], "eaten": {}, "damage": 0,
-            "gold": 0, "wins": 0, "losses": 0, "lucky": 0, "stopped": None, "resumed": None}
+            "gold": 0, "wins": 0, "losses": 0, "lucky": 0, "stopped": None, "resumed": None,
+            "sold": {}, "sold_gold": 0}
 
 
 def process_player(world: dict, player: dict, now: float, rng: random.Random | None = None) -> dict:
@@ -828,6 +847,8 @@ def donate(world: dict, player: dict, item: str, qty: int, now: float) -> str |
         gain = qty
         label = f"{qty:,} gold"
     else:
+        if not city_uses(item):
+            return "The city has no use for that"
         if player["bank"].get(item, 0) < qty:
             return "You don't have that many"
         bank_take(player, item, qty)
@@ -1411,5 +1432,6 @@ def content() -> dict:
     return {
         "items": ITEMS, "skills": SKILLS, "classes": CLASSES, "actions": ACTIONS,
         "buildings": buildings, "xp_table": XP_TABLE, "offline_cap": OFFLINE_CAP, "tiers": TIERS,
+        "city_uses": {item: city_uses(item) for item in ITEMS},
         "equip_slots": EQUIP_SLOTS, "eat_below": EAT_BELOW, "regen_per_hour": REGEN_PER_HOUR,
     }