During January 2025, Jun Tao updated the MicrosoftDocs/cpp-docs repository to align the Compiler Error Messages documentation with a new range of fatal error codes, shifting coverage from C999-C1999 to C1001-C1907. Using Markdown and technical writing skills, Jun revised the documentation to accurately reflect these changes, updated the table of contents for improved navigation, and removed outdated entries to reduce confusion for users. The work was delivered as a single, targeted feature commit, focusing on clarity and maintainability. While the update addressed a specific documentation need, it did not involve bug fixes or broader codebase changes during the period.