Sector Paper XXII — Extreme‑Field Collapse‑Energy Geometry and δI‑Gradient Horizon Amplification in Magnetar Regimes

Sector XXII presents the extreme‑field collapse‑energy geometry of the Unified Information Substrate, demonstrating how δI‑gradient amplification in magnetar‑scale and horizon‑proximal regimes produces forced geometric contraction, collapse‑energy intensification, and horizon‑zone amplification. The sector shows that extreme magnetic‑field environments activate higher‑order collapse‑energy operators, generating B² and B³ scaling behaviour that cannot be reproduced by classical GR, QED, or plasma physics. This paper establishes the substrate‑level mechanism for extreme‑field horizon amplification and forms the seventh component of the horizon‑collapse chain.