Infinite-layer nickelate thin films showed a universal four-fold angular magnetoresistance symmetry across weakly insulating and superconducting compositions. The p/4 symmetry shift suggests a shared magnetic-order-related electronic anisotropy that may link nickelates more closely to cuprate superconductors. Precision transport measurements uncover a hidden four-fold pattern in nickelate thin films, offering fresh evidence that magnetic correlations may shape their superconducting state. Paper: Universal four-fold symmetry in infinite-layer nickelates. I... [7523 chars]