{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "required": ["mode", "tier", "candidate-families"],
  "properties": {
    "mode": {"enum": ["divergent", "converge"]},
    "tier": {"enum": ["light", "standard", "heavy"]},
    "candidate-families": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {"type": "string", "pattern": "^FAM-[A-Z0-9-]+$"}
    }
  }
}