Worked on the Shopify/ui-extensions repository to clarify the behavior of the Discount Code API, focusing on improving developer understanding and consistency. Updated the API documentation and type definitions in TypeScript to explicitly state that discount codes are handled in a case-insensitive manner, aligning the documentation with the actual runtime behavior. This change aimed to reduce confusion and support requests from developers integrating with the API. The work involved API design and front end development skills, ensuring that the usability of the extension API was enhanced without altering the underlying logic or introducing runtime changes, resulting in a smoother developer experience.