Stone Li focused on stabilizing AMS mapping for filament presets in the CodeByZach/BambuStudio repository, addressing a user-facing mapping issue related to STUDIO-8116. Working primarily in C++ and leveraging skills in configuration management and embedded systems, Stone adjusted the default tray_id initialization to resolve mapping errors, first changing its value to -2 and later reverting to -1 after a cloud-side fix. This approach ensured client-side behavior aligned with backend changes, reducing mapping errors for users. By grouping related commits as a single bug fix, Stone improved code stability and maintainability, demonstrating a methodical approach to production issue resolution.