Charles Gueunet enhanced the pyvista/pyvista repository by expanding the configurability of the Quadric Decimation Filter, enabling users to fine-tune 3D mesh decimation processes. He introduced boundary constraint handling and provided granular control over attribute inclusion, addressing the need for more precise mesh processing workflows. Using Python and VTK, Charles ensured backward compatibility by implementing deprecation warnings for legacy parameters and updated the documentation to reflect the new API. His work improved API consistency and discoverability, supporting smoother onboarding for downstream users. The depth of these changes reflects a thoughtful approach to both technical robustness and user experience.