Han focused on stabilizing deployments for the vercel/turborepo repository by addressing issues related to Unicode file paths in multilingual environments. Using Rust and git, Han implemented Unicode-safe handling for Git commands by introducing the -z option across diff-tree, ls-files, and diff operations, ensuring non-ASCII filenames no longer disrupted Turbo’s filter logic or deployment flow. The work involved refactoring file list parsers to support null-delimited outputs, which improved the reliability of file-change detection and deployment processes. This targeted fix reduced deployment failures for international teams, demonstrating careful attention to detail and a deep understanding of software deployment and Unicode handling.