Event Suppression in a Finite Substrate: Foundations of Suppression Field Theory

We present Suppression Field Theory, a foundational framework describing how a finite, universal substrate generates a suppression field that locally reduces the rate of change (RoC), or event density, of energy-bearing systems in space. The formulation is developed within the KA framework, a substrate-based theoretical setting in which physical change proceeds through a finite underlying medium. The theory introduces a distinct substrate-level interaction that modulates the local progression of physical processes, from which a broad class of observed physical phenomena emerge as secondary, effective behavior. The suppression field is sourced solely by energy and acts by regulating event density within the substrate without modifying spacetime geometry or requiring additional matter components. This paper establishes the conceptual foundations, ontology, postulates, and mathematical structure of the suppression field in a system-independent manner. No observational data, numerical fitting, or application-specific analyses are included. Applications to orbital dynamics, galactic systems, and related phenomena are deferred to subsequent papers.