Worked on the upstash/FlagEmbedding repository to enhance technical stability and maintain business value by addressing a compatibility issue in the Python 3.8 environment. Focused on Python development and type hinting, the main contribution involved fixing a TypeError in the __call__ method by updating the return type hint from list[BatchEncoding] to List[BatchEncoding]. This change ensured correct typing and prevented runtime errors related to subscriptable types, improving the reliability of the embeddings pipeline across different Python versions. The work reduced maintenance overhead for multi-version support and demonstrated careful attention to language compatibility and robust code practices in Python.