Worked on improving memory management and build stability for the BPETokenizer component in the openvinotoolkit/openvino_tokenizers repository. Addressed a memory leak by refactoring the TokensList ownership model, replacing shared_ptr with weak_ptr to break cyclic references and reduce memory footprint during long-running tokenization tasks. Resolved a build issue related to the lack of a nullptr constructor for std::weak_ptr, updating both implementation and header files to ensure correct initialization. Utilized C++ with a focus on data structures and memory management, resulting in enhanced reliability and stability for production workflows that rely on persistent tokenization processes in C++ environments.