During the month, contributed to the macvim-dev/macvim repository by enhancing Unison syntax highlighting in Vim. Focused on adding binary number support and refining identifier definitions, the work improved code readability and reduced syntax-related edge-case errors for Unison developers. The approach involved updating VimL syntax files, aligning changes with the upstream Unison repository to ensure consistency and maintainability. This effort included closing issue #18623 through a targeted syntax update, demonstrating attention to code hygiene and upstream integration. Skills applied included Vim script, syntax highlighting, and text editor customization, resulting in more reliable and productive editing experiences for Unison code.