Khalid enhanced authorization error handling in the mongodb-js/compass repository by replacing unreliable string-based detection with a robust approach using MongoDB error code 13. He implemented this feature in TypeScript, focusing on backend development and error handling to improve the reliability of unauthorized access detection. To ensure compatibility, Khalid added a fallback mechanism that matches error messages when necessary. He also developed comprehensive tests covering multiple unauthorized access scenarios, strengthening the maintainability and resilience of the data-service authorization checks. This work addressed potential false positives and negatives, demonstrating thoughtful engineering depth in both implementation and validation of the solution.