Takechi worked on the traP-jp/traO-Judge-judge repository, focusing on backend development and code organization using Rust. During April 2025, he modularized the output parsing flow by creating a dedicated output_parser module, moving logic previously embedded in judge_output.rs. This restructuring improved the maintainability and testability of the judging pipeline, making future updates to parsing logic safer and more efficient. His approach emphasized clean code formatting and enhanced modularity, which reduces the risk of regression and accelerates onboarding for new contributors. The work laid a foundation for scalable feature development and streamlined future refactoring within the Rust-based codebase.