Worked on the traP-jp/traO-Judge-judge repository to enhance file and resource management in Rust-based judge workflows. Addressed a resource leak issue by implementing the Drop trait for the ReadonlyFile type, ensuring that temporary files are automatically removed when they go out of scope. Incorporated robust error handling to manage cleanup failures gracefully, improving the reliability and observability of file operations. This update strengthened the lifecycle management of temporary resources, reducing the risk of leaks during long-running jobs. Demonstrated effective use of Rust’s ownership and RAII patterns, focusing on maintainable code and safe resource handling within the project’s infrastructure.