Worked on the commercetools/test-data repository to deliver a focused data-model enhancement by refactoring the State and StateDraft models. The approach involved migrating these models to a new pattern, introducing 'packed' and 'shipped' presets to clarify state handling and improve downstream data generation reliability. Using JavaScript and TypeScript, the work included updating model definitions, adjusting default values, and simplifying type structures for better maintainability. Additional tasks involved refreshing the ignore file and adding changeset documentation to support changelog-driven releases. This effort established a more extensible foundation for future development while emphasizing model migration, refactoring, and robust testing practices.