Worked on the microsoft/hcsshim repository to enhance the stability of Windows container workloads by addressing a critical startup issue in process-isolated containers. Using Go and system programming skills, delivered a targeted bug fix that restored support for client-mounted roots when Root.Path is set, preventing nil-dereference panics during container initialization. The solution involved synthesizing MountedWCOWLayers to ensure compatibility with Docker workflows and maintain reliable container startup behavior. Emphasized code maintainability by providing clear documentation and rationale within the commit, supporting traceability. This work improved containerization reliability and reduced downtime, demonstrating a methodical approach to debugging and maintaining production-grade systems.