# Data Governance & Quality > Selected work demonstrating this service. - [Wrote a scope rule into the repository after a restructure carried another company's inventory, firewall allowances and prose into it — and kept the quarantined residue under the secret scanner rather than excluding it.](https://platform.engineer.company/portfolio/wrote-a-scope-rule-after-a-credential-leak-124/) - [Wrote tests for the checkers themselves after establishing that a checker fed only clean input will one day report clean because it read nothing — planting a misspelling to confirm the spell‑check finds it, and taking an id range from the database rather than from a number in the test.](https://platform.engineer.company/portfolio/wrote-tests-for-the-checkers-themselves-149/) - [Audited 644 Rust crates for licence compatibility on every build, and proved the check fires by rewriting one crate's licence and by moving the pinned core revision without regenerating.](https://platform.engineer.company/portfolio/audited-644-rust-crates-for-licence-compatibility-163/)