Worked on enhancing data querying capabilities within the DefinitelyTyped/DefinitelyTyped repository by implementing improvements to the DataSource interface for the chartmogul-node integration. Focused on adding new parameters to support processing status and subscription settings, enabling more detailed and flexible queries for analytics use cases. Collaborated through pull request workflows to merge changes that improved compatibility and data handling between TypeScript definitions and the chartmogul-node library. Utilized TypeScript for interface design and API development, with an emphasis on robust data management. The work addressed the need for more precise data analytics, resulting in improved user value and maintainability for downstream consumers.