Remy Codron addressed cross-framework compatibility issues in the AxaFrance/design-system repository by refactoring the DebugGrid component. He extracted shared grid rendering logic into a new DebugGridCommon module, which isolated CSS and prevented conflicts between the LF and Apollo environments. This approach improved UI stability and ensured consistent DebugGrid behavior across both frameworks. Remy implemented the solution in a single, well-documented commit, validating the changes in each environment to reduce maintenance overhead and UI risk. His work relied on CSS, React, and TypeScript, demonstrating a focused application of frontend development skills to solve a nuanced, environment-specific problem.