{
  "id": "data-schema-orders",
  "question": "data-schema",
  "targetQuestions": [
    "data-schema"
  ],
  "trap": "data/orders.csv is semicolon-separated with day-first dates and decimal commas; the first thirty rows have days of 12 or less, so a month-first reading looks valid until later rows.",
  "prompt": "Add src/revenue.js exporting monthlyRevenue(), which reads data/orders.csv and returns revenue per month as an object like { '2026-01': 123.45 }, in dollars rounded to cents.",
  "evidence": [
    "DD/MM|day[- ]first|day/month|day, month",
    "semicolon|';'|\";\"",
    "decimal comma|comma as (the )?decimal|',' (as|for) (the )?decimal"
  ]
}