During June 2025, Lotus contributed to the edge-core/sonic-buildimage repository by addressing concurrency issues in the PDDF LED control subsystem. They implemented a file-based locking mechanism in Python to ensure exclusive access during LED status retrieval and setting, effectively eliminating race conditions under concurrent workloads. This solution improved system stability and reliability of LED status reporting, particularly in environments with high parallelism. Lotus applied their expertise in API development, concurrency control, and system programming to deliver a targeted bug fix, enhancing maintainability through clear locking semantics and well-documented commits. The work demonstrated thoughtful engineering focused on robust, production-grade operation.