Shubham Agrawal developed a Cache Tagging API for the vercel/vercel repository, enabling developers to tag cached content for more granular management and retrieval in serverless environments. He implemented the addCacheTag function using TypeScript, focusing on robust API design and runtime consistency. Shubham addressed a runtime and type mismatch by refactoring the API from an interface to a function type, resolving invocation errors and improving maintainability. His work included comprehensive documentation and a test plan to support Next.js compatibility, ensuring smooth onboarding. This contribution enhanced cache invalidation workflows and laid the groundwork for future tagging-based optimizations in serverless deployments.