Worked on the kiesraad/abacus repository over a two-month period, focusing on code quality, documentation, and testing in Rust. Addressed a documentation error in the Seat Assignment Module’s test suite by correcting test data to accurately reflect seat allocation logic, thereby improving test reliability and reducing regression risk. Enhanced maintainability by updating in-code comments, clarifying the distinction between 'largest remainder' and 'highest averages' terminology in the seat assignment process. Emphasized clear documentation and precise code refactoring, supporting easier onboarding and review. The work prioritized reliability and clarity, with no changes to core functionality, ensuring a stable and maintainable codebase.