During July 2025, contributed to the firedrakeproject/firedrake repository by developing a flexible GTMGPC preconditioner that supports an optional restriction matrix, enhancing solver configurability for large-scale PDE problems. The implementation leveraged Python and applied expertise in linear algebra and numerical methods to allow users greater control over the multigrid hierarchy through custom interpolation and restriction matrices. Comprehensive documentation and a dedicated test case were added to validate the new functionality and ensure reliability. The focus on robust test coverage and clear documentation supports maintainability and onboarding, reflecting a methodical approach to scientific computing and preconditioning in Python environments.