Tobias Pitters refactored core native functions in the pytorch/pytorch repository to improve data pointer handling and enforce const correctness. Focusing on five performance-critical files, he clarified the distinction between mutable and immutable data pointers, reducing mutation risks and enhancing code safety. Using C++ and leveraging his skills in native function optimization and performance tuning, Tobias standardized const usage across Activation, AdaptivePooling, QuantizedLinear, and RNN modules. This work improved code readability and maintainability, laying a foundation for safer future refactors. Although no bugs were fixed, the depth of the changes supports easier onboarding and more reliable memory access in core kernels.