November 12, 2026 | macOS | Python 3.14.9
Fictional practice inputs. Commands run from the extracted practice packs.

$ python3 csv_delivery.py split cut.csv broken --rows 3
Exit 1
STOP: unexpected end of data
If an output folder was created, do not use it without a completed summary.json.

$ python3 csv_delivery.py split split-input.csv parts --rows 3
Exit 0
{
  "status": "PASS",
  "operation": "split",
  "source_sha256": "a78e2ab98124863998ee9e73b564cc3bd04b3612dabbaffc808b3f880594b0d6",
  "input_records": 8,
  "output_records": 8,
  "parts": [
    {
      "file": "part-001.csv",
      "records": 3,
      "sha256": "2f3d7487ba1aaec62e60e221fc4ea36fd4384ae58c193ba76f6411d449ac014b"
    },
    {
      "file": "part-002.csv",
      "records": 3,
      "sha256": "11325739c6095e32da8fd60267ea6c883c2e8855a395e1727f63ada188afb74f"
    },
    {
      "file": "part-003.csv",
      "records": 2,
      "sha256": "599a32ea52b7339052558638e60763b9592801f461fd221648e4721447b5d96b"
    }
  ],
  "decoded_records_and_order_preserved": true
}

First part, final record: ['003', 'First line\r\nSecond line', '1']
Second part, first record: ['004', 'He said "ready"', '3']