reverse

Reverses the order of rows in a data file.

Write with --output. A trailing path is not a positional argument.

# Reverse rows
undatum reverse data.csv --output output.csv

# Reverse JSONL file
undatum reverse data.jsonl --output output.jsonl
undatum reverse workbook.xlsx --table Sheet2 --output out.jsonl

Key options: --output, --engine, --filetype (this command does not take --format-in). Also accepts --table, --flatten-nested, --on-error, --error-log, and --quotechar (shared options).