Jiaqi Yao developed precision watchdog timer enhancements for the apache/nuttx repository, focusing on functional safety in embedded systems. Leveraging expertise in device drivers, kernel development, and C, Jiaqi introduced millisecond-level configurability for auto-monitor reset timeouts and keep-alive intervals, enabling more accurate timing control in safety-critical deployments. The work included implementing a notifier chain, allowing user-registered callbacks on timeout events for customizable auto-monitor responses. These changes addressed the need for reduced false positives and improved response flexibility, while also consolidating and documenting the enhancements to support maintainability and configurability. The depth of work reflects strong embedded systems engineering.