During April 2026, this developer contributed to the facebook/sapling repository by implementing a NIC-based Adaptive Rate Limiting (ARL) configuration feature. The work focused on enabling or disabling ARL dynamically based on network interface card conditions, enhancing operational flexibility and deployment safety. Using C++ for system and network programming, the developer introduced initialization logic and singleton management to ensure ARL stability across diverse environments. Dependencies were added to support NIC-driven gating and initialization paths, laying the foundation for future per-NIC feature toggles. No major bugs were addressed during this period, as the primary emphasis was on robust feature delivery and configurability.