During April 2025, Julien Besnard enhanced the ofiwg/libfabric repository by developing the FI_GET_FD control operation for the TCP provider. This feature allows applications to access the underlying socket file descriptor, enabling direct tuning of socket options such as buffer sizes and busy polling, which are not exposed by the standard libfabric API. Working in C and leveraging expertise in low-level and network programming, Julien integrated this capability to provide users with greater flexibility and control over TCP networking behavior. The work demonstrated a deep understanding of system programming and addressed performance and configurability needs for advanced deployment scenarios.