The Griffiths Dual-Intellect Governance and Supervisory Protocol (DIGSP) v4.0: A Predictive Human–Synthetic Cooperative Architecture for High-Performance Deep-Spac

The Griffiths Dual-Intellect Governance and Supervisory Protocol (DIGSP) v4.0 DIGSP v4.0 is a formally specified human–synthetic cooperative architecture for crewed deep-space vehicle command, physiological stabilisation, and multi-layer defence governance. The protocol unifies three co-equal components — a human command authority, a Belle-class Predictive Cognition Module (PCM), and a dynamically actuated adaptive geometry assembly — into a single coherent command organism governed by a continuous mathematical coherence framework. The architecture serves two simultaneous operational roles. The first is physiological and cognitive stabilisation: DIGSP maintains pilot survivability and command continuity under high-onset, multi-vector acceleration environments generated by rotating electromagnetic propulsion nozzles, through predictive G-vector pre-shaping, onset-rate smoothing, and a 200 ms Predictive Horizon Floor (PHF) that functions as the universal safety gate across all geometry transitions and propulsion mode changes. The second is supervisory governance of the Griffiths Reactive-Field Framework (GRFF) four-layer active/passive defence architecture, coordinating electromagnetic deflection, kinetic membrane management, sensing mesh reinforcement, and structural containment across all mission phases. Authority sharing between human and synthetic cognition is governed by the coherence function C(t) and a dynamic authority coefficient α(t), with a null-thrust constraint formally bounding PCM stabilisation to physiological protection only — no PCM action can alter the vehicle's trajectory. Formal stability of the human–synthetic coherence loop is demonstrated through Lyapunov analysis. Fail-closed geometry defaults to the Neutral Geometry State (NGS) within 50 ms of coherence collapse. A fully specified DIGSP-loss degraded mode ensures that neither physiological protection nor defensive survivability depends on supervisory availability, eliminating DIGSP as a single point of failure. DIGSP v4.0 forms the governance spine of the Griffiths Canon, with defined integration interfaces to the GNMT propulsion architecture, Methane-Steam Hybrid system, NGLS EVA logistics sled, Dual-Ring Habitat, and GRFF defence envelope. The document is structured for peer review submission to Acta Astronautica and for institutional engagement with space agency technology development programmes.