{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://neon-sprawl.local/schemas/quest-objective-def.json",
  "title": "QuestObjectiveDef",
  "description": "Single objective row on a QuestStepDef (content/quests/*_quests.json). Kinds cover gather, craft, encounter, and inventory checks for E7.M1 prototype Slice 1.",
  "type": "object",
  "additionalProperties": false,
  "required": ["id", "kind"],
  "properties": {
    "id": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9_]*$",
      "description": "Immutable objective key for progress tracking and HTTP projection."
    },
    "kind": {
      "type": "string",
      "enum": ["gather_item", "craft_recipe", "encounter_complete", "inventory_has_item"],
      "description": "Objective completion predicate evaluated server-side on success hooks."
    },
    "itemId": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9_]*$",
      "description": "Frozen item catalog id (gather_item, inventory_has_item)."
    },
    "quantity": {
      "type": "integer",
      "minimum": 1,
      "description": "Required count for gather_item, craft_recipe, or inventory_has_item."
    },
    "recipeId": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9_]*$",
      "description": "Frozen recipe catalog id (craft_recipe)."
    },
    "encounterId": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9_]*$",
      "description": "Frozen encounter catalog id (encounter_complete)."
    }
  },
  "oneOf": [
    {
      "properties": { "kind": { "const": "gather_item" } },
      "required": ["itemId", "quantity"]
    },
    {
      "properties": { "kind": { "const": "craft_recipe" } },
      "required": ["recipeId", "quantity"]
    },
    {
      "properties": { "kind": { "const": "encounter_complete" } },
      "required": ["encounterId"]
    },
    {
      "properties": { "kind": { "const": "inventory_has_item" } },
      "required": ["itemId", "quantity"]
    }
  ]
}