Worked on the bazelbuild/rules_rust repository to enhance Rust dependency management and maintain compatibility with evolving toolchains. Focused on upgrading and aligning dependencies such as cargo_toml and toml, addressing type mismatches and ensuring the workspace remained in sync with upstream changes. Applied targeted fixes in Rust code to accommodate new dependency versions, improving build stability and reducing maintenance overhead for downstream users. Leveraged Bazel and Rust to update vendored crates and refresh manifests, supporting long-term maintainability. The work delivered both a coordinated bug fix and a feature upgrade, emphasizing careful dependency management and ecosystem alignment over a two-month period.