During November 2024, Theodore Tan focused on enhancing data integrity within the Shopify/cli repository by addressing a critical bug in the development store fetch process. He updated the GraphQL queries and TypeScript definitions to replace the deprecated 'properties' field with the new 'accessibleShops' field, ensuring alignment with the latest API schema. This targeted fix reduced the risk of misfetches and data inconsistencies, directly improving the reliability of core CLI workflows. Leveraging his expertise in API integration, GraphQL, and TypeScript, Theodore’s work contributed to more robust data retrieval and minimized potential runtime errors and CI failures for the development team.