Nino Tan stabilized the Django plugin subsystem for the matmair/InvenTree repository by addressing a critical bug that caused KeyErrors during plugin reloads, particularly for external plugins with nested module structures. Using Python and Django, Nino refactored the deregistration logic to rely on app_name rather than plugin_path, ensuring correct model handling during reload cycles. He expanded unit test coverage to validate deregistration of nested plugin paths, enhancing the reliability of the plugin system. Additionally, Nino introduced defensive defaults and applied Ruff-style formatting, aligning the codebase with project standards and improving maintainability for plugin authors and backend development workflows.