In April 2025, Peng Huang focused on improving stability and correctness in the AvaloniaUI/angle repository by addressing a crash related to external fence synchronization. He implemented robust validation in C++ to ensure that the ExternalFence SyncWaitFd function would not be called with invalid file descriptors, specifically guarding against cases where vkGetFenceFdKHR returns -1 for signaled fences. By enhancing error handling and updating tests to cover scenarios where eglDupNativeFenceFDANDROID returns -1, Peng strengthened the reliability of the graphics API integration. His targeted debugging and validation work deepened the safety and resilience of synchronization mechanisms within the EGL and Vulkan stack.