In April 2025, Theophile Sandoz developed a Node HID Transport Kit for the LedgerHQ/device-sdk-ts repository, enabling seamless communication between the Ledger Device SDK and HID devices. He focused on improving hardware integration by implementing extensive logging around device interactions, which enhanced debugging and monitoring capabilities. Theophile updated the README to provide clear setup, configuration, and troubleshooting guidance, reducing onboarding friction for developers working with HID support. His work leveraged JavaScript and Node.js, with a strong emphasis on debugging and HID communication. The depth of his contributions established a robust foundation for future hardware integrations and improved the reliability of device connectivity.