Developed and integrated Swift rainbow syntax highlighting for the helix-editor/helix repository, leveraging tree-sitter to deliver enhanced readability and navigation for Swift codebases. This work involved creating a new Swift rainbow query file, enabling parenthesis and bracket highlighting that aids in code comprehension and onboarding. The implementation required in-depth knowledge of language support and tree-sitter’s parsing capabilities, ensuring seamless integration within the editor’s existing architecture. Documentation was updated to reflect the new feature, supporting user adoption and clarity. No major bugs were addressed during this period, with the primary focus on feature development and improving the Swift editing experience.