Worked on the exa-labs/exa-js repository to enhance cost-tracking capabilities by introducing a costDollars field to the AnswerResponse type. This addition enabled precise tracking and reporting of generation costs, supporting downstream analytics and pricing insights. The implementation was carried out using TypeScript, with careful attention to documentation to ensure maintainability and clarity for future development. Throughout the process, concise commit messages and code comments were used to reinforce code quality and transparency. No major bugs were addressed during this period, with the primary focus on feature delivery and aligning technical improvements with business needs for cost visibility and optimization.