The Cognitive Infrastructure Stack™ A Layered Architecture for Deploying Cognition as a Service (CaaS) Systems

Description This working paper introduces the Cognitive Infrastructure Stack™, a layered architectural framework for deploying Cognition-as-a-Service (CaaS) systems. The paper proposes that cognition should be understood not as an isolated property of artificial intelligence models but as an infrastructural capability emerging from structured system architectures that transform environmental signals into governed decisions. Current AI deployments are predominantly model-centric, focusing on predictive performance rather than on the broader architecture of decision systems. This approach often leads to fragmented solutions that lack contextual awareness, integrated knowledge structures, reasoning transparency, and institutional governance. As organizations increasingly rely on AI-driven systems for high-stakes decisions, these limitations become critical. The Cognitive Infrastructure Stack™ addresses this gap by formalizing cognition as a multi-layer infrastructure architecture composed of six interacting layers: Data Layer Context Layer Knowledge Layer Reasoning Layer Decision Layer Governance Layer Together, these layers define a structured cognitive pipeline that transforms environmental signals into actionable decisions under governance constraints. The architecture enables organizations to deploy cognitive capabilities as scalable infrastructure, analogous to how cloud computing transformed computational resources into deployable services. The paper develops a formal representation of the architecture using the system definition: C = (D, X, K, R, A, G) where each component represents a core layer of deployable cognition. The framework also introduces a compositional model of cognitive transformation: α* = G(A(R(K(X(D(S)))))) which expresses how environmental signals are progressively transformed into governed decisions through layered cognitive processing. Beyond technical architecture, the paper examines the implications of cognitive infrastructure for enterprise systems, digital platforms, and public institutions. It outlines deployment models for enterprise Cognition-as-a-Service platforms, explores the emergence of a cognitive infrastructure market, and situates the architecture within the broader development of the cognitive economy, where reasoning and decision capabilities become foundational digital resources. The Cognitive Infrastructure Stack™ provides a conceptual and formal foundation for designing scalable cognitive systems capable of supporting complex decision environments. By shifting the focus from isolated models to integrated cognitive architectures, the framework contributes to the emerging field of cognitive infrastructure engineering and provides a basis for future research on deployable cognition, decision systems, and governance of AI-driven infrastructures.