Over two months, contributed to core open source projects by building features and improving reliability across pnpm, TanStack/Query, Remix, and Zustand. Enhanced pnpm’s build process by refining ignored-build handling and aligning stale-state checks, using Node.js and TypeScript to improve package management workflows. In TanStack/Query, expanded queryKey support to include computed references and getters, increasing flexibility for reactive programming in Vue.js and React. Developed a Remix plugin to exclude server-only exports from client bundles, optimizing dependency scans. Focused on robust testing, runtime verification, and clear documentation, demonstrating a methodical approach to cross-repo collaboration and production stability in JavaScript ecosystems.