During January 2026, Michael Huang contributed to the vercel/ai repository by developing token usage tracking within the useChat onFinish callback, allowing users to monitor API input and output token counts directly in the UI. He enhanced citation handling for webSearch and webFetch features, ensuring accurate tracking and resolution of citation metadata. His work involved updating TypeScript typings, implementing runtime validation with Zod schemas, and improving test coverage and documentation. By focusing on API development and integration, Michael addressed both cost transparency and citation reliability, delivering a more robust SDK for building chat and web integration features with TypeScript.