{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://neon-sprawl.local/schemas/item-def.json",
  "title": "ItemDef",
  "description": "Single item row for catalogs (e.g. content/items/*_items.json). IDs are stable forever—rename display in displayName only. See docs/decomposition/modules/E3_M3_ItemizationAndInventorySchema.md.",
  "type": "object",
  "additionalProperties": false,
  "required": ["id", "displayName", "prototypeRole", "stackMax", "inventorySlotKind"],
  "properties": {
    "id": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9_]*$",
      "description": "Immutable item key for saves, recipes, quests, telemetry, and inventory grants. Never change after content ships; add a new id if the item splits."
    },
    "displayName": {
      "type": "string",
      "minLength": 1,
      "description": "Player-facing label; safe to change without migrating character data."
    },
    "prototypeRole": {
      "type": "string",
      "description": "Prototype Slice 1 archetype (material through equip_stub). CI requires exactly one row per role.",
      "enum": [
        "material",
        "intermediate",
        "consumable",
        "utility",
        "quest_token",
        "equip_stub"
      ]
    },
    "stackMax": {
      "type": "integer",
      "minimum": 1,
      "description": "Maximum stack size per inventory slot for this item def."
    },
    "inventorySlotKind": {
      "type": "string",
      "description": "Where the item may be stored: general bag vs equipment slot (prototype equip stub).",
      "enum": ["bag", "equipment"]
    },
    "rarity": {
      "type": "string",
      "description": "Optional rarity band (unused in prototype Slice 1 rows).",
      "enum": ["common", "uncommon", "rare", "epic"]
    },
    "bindPolicy": {
      "type": "string",
      "description": "Optional bind rule stub (unused in prototype Slice 1 rows).",
      "enum": ["none", "bind_on_acquire", "bind_on_equip"]
    },
    "durabilityMax": {
      "type": "integer",
      "minimum": 0,
      "description": "Optional durability ceiling stub (unused in prototype Slice 1; no durability mutation in v1)."
    }
  }
}