Worked on the racket/racket repository over a two-month period, focusing on improving macro error handling and documentation quality rather than adding new features. Addressed a bug in the Contract-in macro by validating module paths and enhancing error messages, which reduced user confusion and improved guidance for macro usage. Applied skills in Racket, macro development, and error handling to increase robustness and clarity. In documentation, removed a redundant notation subsection and resolved a rendering issue by consolidating content, streamlining onboarding for users and contributors. Emphasized technical writing and maintainability, ensuring documentation changes were reflected in both structure and rendered output.