Taylor Cramer contributed to the rust-lang/rustc-dev-guide by enhancing the error-code documentation process. During November 2024, Taylor authored a new section in error-codes.md that details how to use the error index generator to validate doctests, directly addressing the need for reliable and up-to-date error-code documentation. This addition guides developers through testing workflows, helping to prevent documentation drift and supporting maintainability for those working with the Rust compiler. The work was implemented in Markdown, demonstrating skills in documentation engineering and workflow design. The contribution was focused and well-scoped, providing clear, actionable instructions without introducing unnecessary complexity.