Spiral Infrastructure: Boundary-Driven Design for Cooperative, Low-Friction Systems

Infrastructure systems frequently fail not due to insufficient technology but due to behavioural dependency, fragmented responsibility, and misaligned interfaces. This paper presents a boundary-driven design philosophy in which standardised inputs and outputs, binary routing decisions, and locally adaptive modules enable cooperation without enforcement. Closed-loop assumptions are replaced with spiral advancement, recognising time, wear, entropy, and learning as first-class constraints. By aligning costs upstream and downstream and ensuring all failure modes default safely, the framework promotes resilience under neglect, shared learning dissemination, and scalable implementation. The DSAP criterion (Did the Spiral Advance Properly?) is formalised as a non-negotiable readiness test. Application across waste capture, drainage, biofiltration, and corridor-based infrastructure is outlined to demonstrate generality without prescribing specific technologies.KeywordsSpiral systems; boundary design; infrastructure standardisation; cooperative systems; passive infrastructure; resilience engineering; DSOP; waste and water management