Worked on the derailed/cilium repository to optimize reserved label detection by refactoring the FindReserved function. The approach involved changing the function to return a LabelArray instead of a Labels map, which improved performance for identifying reserved labels and reduced runtime overhead in label processing. This update also addressed an existing TODO, enhancing maintainability and paving the way for future improvements. The work demonstrated backend development and refactoring skills using Go, with a focus on API design and efficient data handling. No major bugs were fixed during this period, as the primary contribution centered on feature enhancement and codebase optimization.