Peng Guanwen developed a configurable RPC port range feature for the Transfer Engine in the kvcache-ai/Mooncake repository, enabling deployment teams to define port boundaries using the MC_MIN_PRC_PORT and MC_MAX_PRC_PORT environment variables. This enhancement, implemented in C++ with supporting documentation in Markdown, addressed the need for flexible resource allocation and improved isolation in multi-tenant environments. By leveraging environment-based configuration and disciplined documentation practices, Peng ensured that the feature could be easily adopted and maintained. The work demonstrated a focused approach to incremental feature delivery, though it did not involve bug fixes or broader system changes during the period.