name: "shop"
category: "Interaction"
description: |
  Buy and sell items at shops.

  Find a shopkeeper NPC and talk to them to open their shop. While
  browsing a shop, these commands are available:

  browse        List all items for sale with buy/sell prices
  list          Same as browse
  buy <item>    Buy an item by name (e.g. "buy fishing bait")
  buy <N> <item> Buy a quantity of an item (e.g. "buy 5 bait")
  buy all <item> Buy as many as you can afford and carry
  sell <item>   Sell an item by name (e.g. "sell bronze sword")
  sell <N> <item> Sell a quantity of an item (e.g. "sell 3 logs")
  sell all <item> Sell all of that item from your inventory
  leave         Exit the shop and return to conversation

  Partial names work: "buy bait" matches "fishing bait". If a name
  matches multiple items, a list is shown to disambiguate.

  Shops buy items at a lower price than they sell them. Some items
  cannot be sold back.

  Shopkeepers can be found throughout the world:
  - General Store: Town Square (sells tools and supplies)
  - Smithy: Forge (sells weapons, armor, and tools)