Worked on the facebook/ocamlrep repository to upgrade the itertools dependency from version 0.10.3 to 0.13.0 using Rust, focusing on addressing deprecation warnings and improving long-term maintainability. The approach involved careful dependency management to ensure compatibility with the evolving Rust crate ecosystem, reducing build-time noise and enhancing CI reliability. By documenting the upgrade rationale and process, the work facilitated future dependency updates and minimized maintenance burdens for downstream users. This targeted feature improved the repository’s readiness for upcoming changes, strengthened technical debt management, and ensured that the codebase remained aligned with modern Rust development practices and standards.