Worked on the roc-lang/roc repository to enhance the developer experience by improving the readability of type checking error messages. Focused on refining error output formatting, specifically by introducing proper spacing to separate concatenated words, which made messages clearer and easier to interpret. Updated test snapshots in line with these changes to ensure consistency and maintained passing tests throughout the process. Emphasized code readability and robust error handling while managing snapshot updates and type checking logic. Utilized Zig and Markdown in the workflow, maintaining a disciplined approach with clear commit messages to support maintainability and traceability within the codebase.