Nikhil enhanced the vectara/vectara-docs repository by delivering new Fern SDK features focused on document summarization and large language model (LLM) creation. He introduced API endpoints for summarizing documents and creating LLMs, updating the SDK groupings to reflect these expanded capabilities. Using YAML for API configuration and SDK generation, Nikhil ensured that the new endpoints were properly integrated and discoverable, aligning the server and SDK surfaces for a smoother developer experience. His work improved API coverage and maintainability, consolidating endpoint updates with SDK-level changes to support future roadmap alignment and enable faster client integration without introducing new bugs.