Worked on the marmelab/react-admin repository to enhance type safety and maintainability for reference-related query options in React applications. Focused on aligning and unifying TypeScript typings for QueryOptions across ReferenceArrayField, ReferenceField, and useReferenceFieldController, this work addressed previous misconfigurations and reduced the risk of runtime errors. By consolidating the queryOptions type, the developer improved reliability and made future refactoring more straightforward. The changes streamline onboarding for new contributors and support a more robust developer experience. The technical approach centered on frontend development using React and TypeScript, emphasizing correctness and maintainability in the handling of reference fields and controllers.