Worked on enhancing the dbos-inc/dbos-transact-ts repository by refactoring the Koa.js middleware application to ensure middleware executes only once per request, addressing issues with duplicate invocations. Focused on backend and API development using Node.js, JavaScript, and TypeScript, the work involved consolidating middleware at the router verb level and adding a new GET API endpoint. Comprehensive tests were introduced to validate both middleware flow and endpoint correctness, improving reliability and predictability. Internal documentation was updated to reflect these changes, and a targeted bug fix was implemented to prevent multiple middleware invocations, resulting in a more robust and maintainable API surface.