During March 2026, X.Y. Kong focused on backend development for the BerriAI/litellm repository, addressing stability issues in LLM streaming across multiple providers. Kong implemented a standardized approach to handling the finish_reason field by mapping unknown values to a default, which prevented validation errors in the stream_chunk_builder and improved error handling. This change enhanced cross-provider compatibility, reducing downstream streaming errors and enabling more reliable multi-provider workflows. The work was carried out using Python and emphasized robust unit testing to ensure correctness. While the scope was targeted, the solution demonstrated depth in diagnosing and resolving nuanced compatibility issues in backend systems.