Presence Engine v1.1 Cache-to-Cache State Transfer for Persistent Identity in Stateful AI Systems

Presence Engine v1.0 established a Logic-over-Model (LOM) substrate achieving 0.007ms warm-path latency with 0.0006% structural overhead and 100% deterministic veto integrity (DOI: 10.5281/zenodo.19101284). This report introduces the v1.1 architecture extension: a three-layer cache-to-cache (C2C) state transfer protocol enabling persistent identity across session boundaries without model retraining or context window accumulation. We formalize the C2C transfer sequence, define the three memory layers (conversational, associative, dispositional), and specify the sovereignty gate behavior at cache read time. The central finding: continuity is a system property, not a model property. Identity persists because structure persists -- not because the model remembers. Keywords: cache-to-cache transfer, C2C continuity, stateful Al, LOM, identity persistence, sovereignty gate, presence engine