Worked on the Switcheo/carbon-js-sdk repository to address a critical testnet connectivity issue affecting SDK reliability. Focused on frontend and SDK development using TypeScript, the work involved updating the testnet chainId to match the latest testnet environment, ensuring seamless integration for developers and improving the reliability of continuous integration pipelines. The solution included delivering an auditable commit and a detailed changelog entry, which enhanced traceability and reviewability of the configuration changes. By verifying end-to-end connectivity and consolidating testnet updates, the work reduced onboarding friction for developers and strengthened downstream integrations, contributing to a more robust SDK development process.