During November 2025, Lalex developed and integrated a new 'vacances_fr' domain within the home-assistant/brands repository, enabling vacation-management-specific functionality and supporting future localization needs. The work focused on domain management and integration development, leveraging domain-driven design principles and Python-based Home Assistant integration practices. Lalex structured the new domain to enhance system extensibility and configuration flexibility, allowing tailored workflows for vacation scenarios. The implementation featured clear commit documentation and strong collaboration with the upstream repository, ensuring maintainability and traceability. While the contribution was limited to a single feature, it addressed a targeted need and laid groundwork for future enhancements.