Useful Few product

CSV Contract Regression Reporter

Catch CSV schema and data-contract regressions locally and generate reproducible JSON and HTML evidence before a broken file reaches downstream users.

What it does

A standard-library Python CLI for bounded CSV contract checks: headers, types, missing values, uniqueness, and deterministic evidence reports. It runs locally, requires no hosted account, and includes examples and documentation. It does not promise universal validation or regulatory compliance.

Delivery model

One-time digital download
Local files; no mandatory hosted account
Documentation included
Automatic secure delivery when checkout opens

Boundaries

This is a focused operational aid, not professional advice, certification, attestation, or a promise of a particular business outcome.