Supplementary Information for Gravity as a Response Field in Spacetime

This document provides the full methodological details, null tests, robustness checks, and reproducibility information supporting the results presented in Gravity as a Response Field in Spacetime (Chaplin, 2026). It contains detailed descriptions of all datasets, map construction procedures,structural splits, mass-controlled tests, shuffle and phase-randomization null experiments, and high-statistics morphological analyses summarized in the main paper. All analyses documented here are fully reproducible using the public data and code archive deposited at Zenodo (Chaplin, 2026; DOI:10.5281/zenodo.1834208). This supplement introduces no new empirical claims beyond those presented in the main paer and exists solely to document methods, intermediate results, and reproducibility details.