During September 2025, Mohamed Habib contributed to the facebook/pyre-check repository by addressing a bug in the Pyre Type Checker’s diagnostic error reporting. He replaced generic placeholder codes with specific error names and numeric identifiers, enhancing the clarity and reliability of error messages for both developers and downstream tools. This work involved Python code refactoring, static analysis, and rigorous regression testing to ensure accuracy and maintainability. By improving the error-code taxonomy and validating changes through established tests and code review, Mohamed enabled more efficient debugging and smoother integration with external tooling, demonstrating disciplined engineering practices within a complex static analysis codebase.