The Appearance Interface: A Formal Framework for the Transition from Classical Records to Lived Experience

This paper develops a structural, operational account of the “appearance interface”—the process through which decohered, redundantly recorded environmental information becomes lived experience. The framework is built on four elements: (i) the phenomenological admissibility structure A∗, specifying invariant constraints on what can count as an appearance; (ii) the operational quantity Aop, extracted from redundancy, decomposition, and detector physics; (iii) the space of admissible appearance-configurations F, formally defined using topological and perspectival constraints; and (iv) a constrained morphism-class Φ, encoding the transitions that are physically and phenomenologically permissible. These elements are further shaped by a history-dependent trace-structure K(t) with an update rule fK. Unlike theories that posit new psychophysical laws, the appearance interface is exclusionary rather than generative: it specifies which transitions to appearance are forbidden by insufficient redundancy, incompatible decompositions, detector limitations, or conflict with historical priors. The result is a physically disciplined account of how classical records become appearance-structures. The paper clarifies the relationship between the interface and relational quantum mechanics, spectrum broadcast structure, predictive processing, and other interface theories. Finally, the framework yields novel empirical predictions linking redundancy, detector physics, and phenomenal granularity.