Developed and released the initial Lit-Query package for the TanStack/query repository, enabling efficient data fetching and state management in Lit applications. Focused on performance, the implementation introduced support for infinite queries, mutations, and enhanced type inference using TypeScript and JavaScript. A host-update optimization was added to minimize redundant renders, improving runtime efficiency. The package was integrated into a monorepo structure with Nx targets, standardizing build scripts and formatting to streamline maintainability. Comprehensive documentation and examples were provided to support onboarding and integration, while continuous integration and build processes were refined to ensure reliable delivery and a consistent developer experience.