Worked on the webex-js-sdk repository to address a critical issue affecting presence updates, specifically related to Do Not Disturb (DND) status handling. Implemented a targeted bug fix in JavaScript and TypeScript that ensures the 'label' field is only included in API requests when the presence status is not set to 'dnd', preventing API failures and maintaining accurate user presence. Enhanced the reliability of the solution by adding unit tests to verify correct label handling and reduce the risk of regressions. Focused on API integration and unit testing, the work improved the stability of presence updates for end users.