Worked on the swiftlang/swift repository to enhance the reliability of debugging information in the Swift compiler. Focused on the SILGen debug-info pipeline, addressing an issue where implicit conversions derived from explicit nodes were not correctly marked, which previously led to inaccurate debug data. Applied expertise in Swift programming, C++, and compiler design to implement a targeted fix that treats these conversions as explicit, ensuring more precise and consistent debug information. Added regression tests to validate the new behavior and maintain stability across future changes. This work improved debugger reliability and developer productivity while maintaining minimal impact on compile-time performance.