During May 2025, Frederico worked on front-end refinements for the semaphoreio/semaphore repository, focusing on improving onboarding clarity and configuration stability. He addressed user confusion in the project creation workflow by relocating the '+ Create new' button and updating instructional text, resulting in a more intuitive UI. Additionally, Frederico resolved a bug in the YAML Editor by resetting the isRendered flag on tab switches, ensuring reliable navigation between configuration states. His work, primarily using JavaScript and YAML, demonstrated attention to user experience and interface reliability, though it was limited in scope to targeted bug fixes rather than broader feature development.