{
  "synthetic": true,
  "scope": "Invented teaching records; not a vendor export, bank-format compatibility test or accounting decision.",
  "harmless_formula_like_example": [
    [
      "date",
      "description",
      "amount"
    ],
    [
      "2026-02-03",
      "=1+1",
      "-12.30"
    ]
  ],
  "roundtrip": [
    [
      "date",
      "description",
      "amount"
    ],
    [
      "2026-02-03",
      "=1+1",
      "-12.30"
    ]
  ],
  "meaning": "Python CSV reading preserves the leading equals. Excel evaluation, text import and save/reopen were NOT executed. No universal sanitization claim."
}