{
  "name": "validators.mandatory",
  "description": "Validates that the input value or resolved expression result is present, throwing if validation fails",
  "signature": {
    "input": {
      "kind": "validated-value",
      "description": "Literal value or expression to validate as mandatory",
      "required": true,
      "mode": "ValueOrExpression"
    }
  }
}