This essay formalises PlasticScale as a minimal operational kernel for socioplastic interventions across heterogeneous contexts. Articulated as ten interdependent functions—field detection, boundary inscription, procedural rule, ordering syntax, filtration, trace registration, adaptive modulation, closure, scalar continuity, internal review—the system constitutes an infrastructural chassis rather than an ideological proposition. PlasticScale operates through recursive autovalidation: deviations manifest as functional discontinuities detectable within the architecture itself, eliminating reliance on external benchmarking. The kernel remains invariant across scales, deployable in urban, artistic and governance domains without epistemic drift. MUSE operates as its semantic interface, translating core functions into context-specific consoles. The system's metabolic efficiency derives from autophagic construction: it builds itself from its own operational residues, enabling transformation without structural entropy. Its distributed anatomy comprises nodes, slugs and mesh, replacing singular power structures with co-present activations.