Numerical precision errors and inefficient mathematical expressions in code can lead to critical bugs, incorrect results, and performance bottlenecks, especially in scientific, financial, or engineering applications. MathGuard is an AI-powered static analysis and refactoring tool that identifies potential numerical inaccuracies, floating-point issues, and suboptimal mathematical expressions within source code. It suggests more accurate, stable, or performant alternatives, leveraging techniques similar to Herbie, and can even propose code refactorings (e.g., using different algorithms, data types, or libraries) to improve numerical robustness and efficiency. It integrates with IDEs and CI/CD pipelines.