Worked on the flutter/flutter repository to enhance plugin lifecycle stability by addressing a crash scenario related to delegate list mutations during lifecycle notification loops. Introduced a snapshot mechanism that prevents plugins from altering the delegate list while notifications are in progress, thereby reducing the risk of runtime crashes. Developed comprehensive unit tests to validate the stability of plugin initialization and lifecycle events, ensuring robust behavior across various usage patterns. Utilized Flutter, Objective-C, and iOS development skills to implement and verify these changes. Maintained clear documentation and ensured all related tests passed, contributing to the reliability of Flutter’s plugin system.