During May 2025, Tongji focused on technical improvements across six repositories, including docker/compose, nuclei, and gofiber/fiber. He refactored codebases to replace custom containment logic with Go’s standard library slices.Contains, simplifying membership checks and removing legacy utilities like stringutils.go. This approach reduced maintenance overhead and improved code readability, particularly in middleware and core binder components. Tongji also enhanced documentation and clarified code comments in projects such as hyperlane-monorepo and grafana/prometheus, making onboarding easier without altering functionality. His work, primarily in Go, JavaScript, and Rust, emphasized maintainability and consistency, demonstrating depth in code refactoring and documentation improvement across diverse codebases.