{
  "disclosure": "Fictional, app-neutral worked excerpt. No customer account or live API call. Not the complete package.",
  "title": "Document template merge preflight",
  "columns": [
    "Placeholder",
    "Source value",
    "Requirement"
  ],
  "sourceRows": [
    [
      "company_name",
      "Example Studio",
      "required"
    ],
    [
      "renewal_date",
      "blank",
      "required"
    ],
    [
      "contact_name",
      "Sam",
      "optional"
    ]
  ],
  "resultRows": [
    [
      "company_name",
      "Example Studio inserted in sample copy"
    ],
    [
      "renewal_date",
      "unresolved field retained"
    ],
    [
      "contact_name",
      "Sam inserted"
    ]
  ],
  "rule": "A missing required value blocks finalization. Do not invent signatures, dates or commercial terms.",
  "sourceRowCount": 3,
  "outputRowCount": 3
}