Worked on stabilizing client configuration isolation in the supabase/supabase-py repository by addressing a subtle bug related to shared mutable state in client options. Improved the reliability of both asynchronous and synchronous clients by replacing the use of deepcopy with copy, ensuring that each client instance maintains independent options and headers. This change prevents unintended mutations when multiple clients are used concurrently, reducing debugging time and enhancing predictability in multi-client scenarios. The solution was implemented using Python and focused on backend and full stack development, with particular attention to safe API integration and efficient configuration management across different client contexts.