Alexander Brevig enhanced Forth language support in the helix-editor/helix repository by improving the Tree-sitter grammar and refining syntax highlighting for Forth. His work focused on language grammar design and parser development, resulting in more accurate code parsing and highlighting within the Helix editor. Using Scheme and TOML, Alexander updated the Forth grammar to integrate more effectively with Tree-sitter, addressing specific parsing issues and increasing the reliability of syntax highlighting. Although the scope was limited to a single feature over one month, the changes expanded Helix’s language coverage and improved productivity for developers working on Forth projects within the editor.