Sheepdog Guidance of Space‑Phase: Unified Corridor Installation in Atomic Electron Shells and Black Hole Event Horizon Spiral Structures

In the Space‑Phase (SP3) framework, the substrate of space participates actively in guidingmatter and energy transport through corridor installation. This paper presents a unifiedinterpretation of electron shell confinement in atoms and spiral structure formation atblack hole event horizons as manifestations of the same substrate coordination principle.Using the sheepdog guidance analogy, space‑phase conditioning is shown to guide electronmotion into stable confinement corridors while simultaneously guiding photon and plasmamotion into spiral coherence corridors near black hole horizons. This shared mechanismexplains stability, persistence, and efficiency of transport across extreme scale differences.