Data and code for: The ISW-to-lensing ratio of DESI photometric voids as a probe of gravitational potential decay

Data products, analysis pipeline, and figure scripts accompanying Ader (2026), "The ISW-to-lensing ratio of DESI photometric voids as a probe of gravitational potential decay," submitted to MNRAS. This deposit contains: The analysis pipeline: four Python scripts covering the main stacking analysis (stacked ISW temperature and CMB lensing convergence around photometric voids from the DESI Legacy Imaging Surveys, compensated top-hat and core estimator measurements, and the ISW-to-lensing ratio R(z) in four tomographic redshift bins 0.0 < z ≤ 0.8), asymmetric bootstrap errors on R, a multi-angle lensing rotation null, and a self-similarity check of the stacked kappa profiles. All derived data products, organised by script: per-slice stacked temperature and lensing profiles, Monte Carlo and jackknife covariance outputs, robustness test results, core aperture justification metrics, asymmetric bootstrap bounds on R, ΛCDM fit parameters, rotation-null samples and summary, and pairwise self-similarity chi^2 values. Figure scripts and PDFs for Figures 1, 2, A1, and C1 in the paper. Input data (Planck 2018 CMB maps and DESI Legacy Survey void catalogues from Hang et al. 2021, MNRAS 507, 510) are not redistributed but are publicly available; see data_sources.txt for download URLs. See README.md for the full repository structure and reproduction instructions.