Francisco Bermejo focused on stabilizing URL handling in the zio/zio-http repository, addressing a critical bug in the HttpCliApp component. He corrected the fold direction in the URL transformation logic, ensuring accurate endpoint generation for CLI interactions. Using Scala and leveraging his skills in API and backend development, Francisco also expanded the test suite to cover DELETE path parameters, validating multiple scenarios and reducing the risk of future regressions. His work improved the reliability and maintainability of the client layer, providing a stronger foundation for integration and safer refactoring, with a clear emphasis on robust testing and targeted bug resolution.