LFIS–17: Light Frame Infrastructure Series — Canonical Concept Registry for Representability Closure: Volume 17

LFIS–17 records the canonical concept registry required for representability closure in Light Frame Cadence Theory. This volume presents a minimal, infrastructure-level set of definitions intended for citation, priority, and stable reference across the Light Frame Infrastructure Series. The registry does not introduce new principles or constraints; it formalizes the terminology required to reference representability closure consistently once the constraint framework is complete. All concepts are stated without interpretive narrative, phenomenology, or dynamical mechanism. The registry is intentionally sterile and minimal. Each concept performs a distinct structural role, overlaps are excluded by construction, and no explanatory hierarchy is imposed. Mathematical anchoring, derivations, and applications are recorded elsewhere in the series. LFIS–17 does not extend the theory or reopen closure. It serves as the definitive concept reference layer supporting representability completion, routing, and post-closure stability within the Light Frame Infrastructure Series.