Worked on the ruby/ruby repository to enhance caching for Git-sourced gems in RubyGems, focusing on improving build reproducibility and cache reliability. Developed a feature that serializes gemspec files when caching git sources, ensuring that gemspec metadata is preserved and can be reliably retrieved from the cache. This involved updating the cache_to method in bundler/source/git.rb to include gemspec serialization, thereby strengthening the integrity of cached dependencies. Utilized Ruby as the primary language and leveraged skills in Bundler, RubyGems, and source control to address cache-related failures, resulting in more dependable dependency management for Ruby projects using Git-sourced gems.