Over a two-month period, contributed to both performance optimization and front-end tooling across two repositories. In scroll-tech/scroll, improved throughput by pre-allocating chunk block slices in Go, reducing memory reallocations and enhancing maintainability. Later, developed the Raycast Markdown Styler Extension for raycast/extensions, enabling Markdown-to-styled-HTML conversion with inline CSS and a browser-based preview, streamlining content editing workflows for users. This extension supported a broad range of Markdown elements and provided a one-click copy feature, all implemented using JavaScript, TypeScript, and CSS. The work focused on practical enhancements, addressing both backend efficiency and user-facing productivity within targeted scopes.