Worked on the macvim-dev/macvim repository to enhance Hylo language support by implementing filetype detection for *.hylo files using Vim script. This update ensured that Hylo files are now accurately recognized within Vim, enabling correct syntax highlighting and editing behavior. The technical approach focused on improving file type detection and software maintenance, addressing a previous issue where Hylo files were misclassified. All contributions were made with signed commits, reinforcing code quality and collaborative standards. These changes reduced friction for Hylo developers, improved the overall editing experience, and aligned MacVim more closely with the needs of the Hylo development ecosystem.