Worked on the wxiaoguang/gitea repository to improve the accuracy of divergence metrics by addressing cache invalidation issues when the repository’s default branch changes. Focused on backend development using Go and Git, the work involved delivering a targeted bug fix that ensures divergence calculations always reflect the current default branch. Integration testing was added to verify correct behavior after branch switches, strengthening the reliability of code health metrics across dashboards and APIs. The solution localized cache invalidation to minimize performance impact, reducing the risk of stale data and supporting teams in maintaining accurate and up-to-date divergence reports.