Release v0.1.6 2026-07-12

src/game/progression/gear.ts

@@ -156,6 +156,17 @@ export function canAffordGearUpgrade(inventory: readonly MaterialStack[], costs:
   return costs.every((cost) => (inventory.find((item) => item.id === cost.itemId)?.quantity ?? 0) >= cost.quantity);
 }
 
+export function canUpgradeGearSlot(
+  progress: GearProgress,
+  inventory: readonly MaterialStack[],
+  ownerId: GearOwnerId,
+  slotId: GearSlotId,
+): boolean {
+  const currentLevel = progress[ownerId].slots[slotId].level;
+  return currentLevel < MAX_GEAR_LEVEL
+    && canAffordGearUpgrade(inventory, gearUpgradeCosts(ownerId, slotId, currentLevel));
+}
+
 export function spendGearCosts(inventory: readonly MaterialStack[], costs: readonly GearUpgradeCost[]): MaterialStack[] {
   if (!canAffordGearUpgrade(inventory, costs)) {
     const missing = costs.find((cost) => (inventory.find((item) => item.id === cost.itemId)?.quantity ?? 0) < cost.quantity);