Developed and delivered a targeted feature expansion for the mason-registry repository, focusing on enhancing Markdown workflows through the introduction of the Markdown Preview Language Server (MPLS) package. This work involved implementing cross-platform support for macOS, Linux, and Windows, ensuring consistent behavior and maintainability across environments. Leveraging expertise in Language Server Protocol (LSP), Markdown, and Neovim, the developer integrated Neovim LSP configuration to provide a seamless editing and preview experience for Markdown files. The contribution addressed the need for improved Markdown tooling within the repository, streamlining developer productivity and establishing a robust foundation for future cross-platform enhancements.