Wellska worked on the fern-api/fern-platform repository, delivering a cache optimization and loader simplification for nextUrl resolution using TypeScript and Next.js. Their approach involved removing the 'use cache' directive from the GET function to reduce cache churn and potential stale data, while updating the cache tag in getLlmsFullTxt to ensure consistent caching across related calls. By commenting out fern_token retrieval, Wellska streamlined loader initialization, reducing complexity and potential failure points. The work focused on improving performance and maintainability, resulting in a cohesive set of changes that addressed both caching behavior and code clarity within a single, traceable commit.