Deterministic Accessibility Contraction Under Paired Admissibility Regimes in a Native SU(2) Substrate

Gravitype V7.0 — Experiment This record contains the paper “Deterministic Accessibility Contraction Under Paired Admissibility Regimes in a Native SU(2) Substrate” together with its reproducibility context. V7.0 is an experimental Gravitype release. It tests whether restricting admissible reconciliation pathways, while leaving the underlying substrate, update rules, initialization, schedule, and parameters unchanged, produces deterministic macroscopic reorganization in the native SU(2) substrate. The paired observable is final total frustration difference: ΔΦfinal(s) = Φfinal(NATIVE) − Φfinal(MONOTONE) Across 200 paired realizations, the contraction is strictly positive for all seeds, with median ΔΦfinal = 29.686, W = 20100, and p = 7.18 × 10^-35 (one-sided). Deterministic replay yields zero mismatches, admissibility enforcement yields zero violations, placebo controls are null, and pair-breaking permutation removes the signal. These results establish accessibility restriction as a deterministic regime-forming mechanism within an unchanged native substrate. This release should be read as a data-first experimental anchor: it establishes substrate-invariant regime divergence under a locked paired-seed protocol, and provides the empirical basis for later accessibility-based analyses and mapping papers.