Source data and reproducibility code for "Group-defense-mediated repulsive prey-taxis: local PDE stability and Turing–Hopf branch selection in a predator–prey model"

This archive contains the source data, reproducibility scripts, Galerkin-DDE validation outputs, figure-regeneration code, and reference DOI audit supporting the manuscript “Group-defense-mediated repulsive prey-taxis: local PDE stability and Turing-Hopf branch selection in a predator-prey model”, prepared for submission to Bulletin of Mathematical Biology. The model studies a delayed predator-prey PDE in which group defense of prey is represented by a repulsive prey-taxis flux in the predator equation. The archive supports recomputation of the Hopf-pitchfork cubic coefficients, verification of the Galerkin-DDE qualitative branch labels, modal-resolution and time-step robustness checks, and reproduction of the manuscript figures. The Galerkin-DDE outputs are intended as local qualitative branch-label diagnostics and are not certified convergence proofs for the full delayed PDE. Reproducibility command: python run_reproducibility_check.py