Sarah Brolley enhanced the commercetools/ui-kit repository by improving the Filters UI, ensuring applied filter tags remained accurate even when edited externally and introducing a persistent badge to display active filter counts. She focused on React component state management and test-driven development to increase UI reliability and maintainability. In the commercetools/test-data repository, Sarah delivered REST and GraphQL-compatible test data model and builder enhancements, including reusable presets and a unified v2 builder pattern using TypeScript and JavaScript. Her work consolidated test-data models, improved cross-API consistency, and streamlined onboarding, reflecting a thoughtful approach to component development, API design, and robust testing practices.