In September 2025, Hristiyan Rissanov developed the RpcFunctionFetcher interface for the VKCOM/kphp repository, focusing on modularizing RPC result storage and retrieval. He designed the interface to decouple result management from RPC execution, improving testability and runtime performance. His work included generating a PHP interface to expose RPC results to PHP clients, updating runtime headers, and integrating the new interface into build configurations. Utilizing C++, PHP, and code generation techniques, Hristiyan addressed evolving requirements in RPC architecture. The depth of his contribution is reflected in the careful interface definition and seamless integration, laying a foundation for robust cross-language RPC flows.