In March 2026, Tom Bidne enhanced project validation and user messaging in the haskell/cabal repository, focusing on improving build reliability and developer feedback. He enforced required fields in cabal.project files, converting previous warnings into hard errors to ensure misconfigurations fail early with clear guidance. Additionally, Tom introduced a parser-aware warning for dotlines in free text fields for Cabal 3.0+, clarifying their literal treatment and preventing confusion. Working primarily in Haskell and leveraging skills in compiler design and error handling, his contributions addressed longstanding issues, aligning documentation and code to reduce support friction and improve the overall configuration experience.