During January 2025, Sergio Basurto developed a robust username handling flow for the PPartisan/Roky repository, focusing on the Profile module. He implemented the RequestUserNameUseCase in Kotlin, centralizing the business logic for username requests and validation. This use case enforced rules to reject blank usernames and applied length-based validation, ensuring deterministic outcomes for downstream processes. By integrating this logic directly into the Profile module, Sergio improved consistency and maintainability across the user onboarding experience. His work demonstrated a clear understanding of use case implementation and modular design, addressing a specific need for reliable username management within the application’s architecture.