Worked on the ofiwg/libfabric repository to enhance the reliability of completion queue write paths in the TCP provider. Addressed a critical bug by implementing robust error handling and logging for previously unchecked return values in the ofi_cq_write_src and ofi_cq_write functions. This C programming effort focused on improving system programming practices by ensuring that write failures are properly detected and logged, reducing the risk of silent failures in high-throughput environments. The changes maintained API compatibility and had no negative impact on performance, while increasing observability and enabling faster incident response through improved debugging visibility and adherence to quality standards.