This reminds me of so many times doing ad-hoc manual ETL with co-workers, e-mailing back and forth files with names like "accounts-final.csv", "accounts-really-

This reminds me of so many times doing ad-hoc manual ETL with co-workers, e-mailing back and forth files with names like "accounts-final.csv", "accounts-really-final.csv", "accounts-this-is-the-last-one-for-sure.csv", and inevitably descending into obscenity.