Francisco Bermejo focused on stabilizing URL handling in the zio/zio-http repository, addressing a critical bug in the HttpCliApp component. He fixed the URL generation logic by correcting the fold direction in the transformation method, which improved the accuracy of endpoint interactions for CLI usage. Using Scala and leveraging his skills in API and backend development, Francisco also expanded the test suite to cover DELETE path parameters, ensuring robust validation for multiple scenarios. His targeted improvements reduced integration errors and enhanced the reliability of the client layer, providing a stronger foundation for future refactoring and safer ongoing development in zio-http.