Matthew Tracey developed two features across the jdx/mise and telegramdesktop/winget-pkgs repositories, focusing on cross-platform package management and distribution. In jdx/mise, he enhanced the registry by importing package descriptions from aqua and introduced an OS specifier for the tuist package, addressing installation issues on Linux and Windows. He updated documentation and tests to support these changes, improving reliability and discoverability. For telegramdesktop/winget-pkgs, Matthew packaged WSBBuilder for winget, detailing installer metadata, locale support, and versioning to streamline deployment of the Windows sandbox tool. His work leveraged Rust, YAML, and configuration management to enable smoother, more reliable installations.