During September 2025, this developer refactored the Hubble peer service within the derailed/cilium repository, focusing on architectural improvements using Go. They introduced a new peercell package and integrated it into the existing Hubble cell structure, transitioning the service to a modular, cell-based design. This approach reduced cross-component coupling and addressed technical debt, laying a foundation for safer and faster future feature delivery. Their work emphasized modular architecture, system design, and refactoring, resulting in improved maintainability and easier onboarding for future contributors. No major bugs were fixed during this period, as the primary focus remained on code quality and architectural enhancements.