Worked on the microsoft/git repository to enhance the git cat-file command, focusing on automation reliability and improved scripting workflows. Developed a new %(objectmode) atom to display octal object modes in batch outputs, and expanded the test harness to support generic object specifiers, including those with spaces. Addressed batch-mode handling for submodules, ensuring accurate reporting of submodule entries. Updated documentation and tests to reflect these changes. Leveraged C and shell scripting to implement and validate these features, demonstrating a strong grasp of Git internals, command-line tooling, and automated testing practices within a collaborative open-source development environment.