Grant Cleary worked on enhancing cross-context rendering reliability in the BrightspaceUI/core repository by enabling the default MathJax context for non-LMS environments. He implemented this feature using JavaScript and front end development skills, ensuring that MathJax rendering is consistent across both LMS and non-LMS contexts without requiring environment-specific configuration. The technical approach involved defaulting the MathJax context to true, which reduces configuration drift and minimizes the risk of missing math rendering in new environments. The code was designed for low risk, with a clear rollback path, reflecting a focused and maintainable solution to a targeted rendering problem.