During November 2025, Ansen Huang focused on stabilizing EFI variable retrieval in the microsoft/mu_basecore repository. He addressed a critical bug in the FindVariableEx() function by introducing explicit state validation within the index-table optimization path, ensuring only valid variables are returned and deleted entries are skipped. This change improved boot-time reliability and correctness without affecting the linear traversal path. Ansen used C programming and system programming skills to update logic for handling duplicate variable names and GUIDs, and added NVRAM-based tests to verify correct behavior. The work demonstrated depth in firmware development and maintained backward compatibility with existing code paths.