During March 2026, Xiaosong Wang focused on backend development in Go, contributing to the moby/moby repository by addressing reliability issues in container filesystem cleanup. He engineered a targeted retry mechanism to handle ENOTEMPTY errors encountered during directory deletion, reducing transient cleanup failures and stabilizing container lifecycle operations. The solution was implemented as a production-ready patch, following established Go error handling practices and aligning with repository guidelines. By documenting the approach and ensuring compatibility with existing CI and tests, Xiaosong improved maintainability and observability. His work enhanced operational reliability for container orchestration environments, demonstrating depth in Go and backend engineering.