{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://neon-sprawl.local/schemas/encounter-def.json",
  "title": "EncounterDef",
  "description": "Single encounter template row for catalogs (e.g. content/encounters/*_encounters.json). IDs are stable forever—rename display in displayName only. See docs/decomposition/modules/E5_M3_EncounterAndRewardTables.md.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "id",
    "displayName",
    "completionCriteria",
    "requiredNpcInstanceIds",
    "rewardTableId"
  ],
  "properties": {
    "id": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9_]*$",
      "description": "Immutable encounter key for progress tracking and completion events."
    },
    "displayName": {
      "type": "string",
      "minLength": 1,
      "description": "Player-facing label; safe to change without migrating character data."
    },
    "completionCriteria": {
      "type": "object",
      "additionalProperties": false,
      "required": ["kind"],
      "properties": {
        "kind": {
          "type": "string",
          "description": "Prototype Slice 3: defeat all listed NPC instances.",
          "enum": ["defeat_all_targets"]
        }
      }
    },
    "requiredNpcInstanceIds": {
      "type": "array",
      "minItems": 3,
      "maxItems": 3,
      "uniqueItems": true,
      "items": {
        "type": "string",
        "pattern": "^[a-z][a-z0-9_]*$"
      },
      "description": "NPC instance ids from server PrototypeNpcRegistry (CI cross-ref set gate)."
    },
    "rewardTableId": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9_]*$",
      "description": "RewardTable id granted once on encounter complete."
    }
  }
}