Kongha Lee contributed to the eslint/eslint repository by enhancing the accuracy of error reporting for the No-Alert rule. Focusing on JavaScript and leveraging testing best practices, Kongha introduced endLine and endColumn properties to invalid test cases, enabling more precise diagnostics for multi-line code scenarios. This adjustment improved the reliability and maintainability of the test suite, ensuring that error locations are reported with greater detail. By linking the changes to a specific pull request, Kongha facilitated traceability and collaboration within the project. The work demonstrated a targeted approach to quality improvement, addressing a specific bug rather than introducing new features.