This work presents the core framework of Relaxation-Driven Cyclic Cosmology (RDCC), a minimal and structurally motivated approach to cyclic cosmology based on standard Einstein gravity, a single complex scalar field, and global CPT symmetry. Version 1.1 introduces an explicit framework-level definition of RDCC, clarifying the distinction between global CPT-symmetric structure and sector-local physical dynamics. In particular, time orientation, entropy growth, and causality are identified as emergent, sector-dependent properties rather than global features of spacetime. The update is purely conceptual and structural in nature; no changes are made to the underlying dynamical assumptions or equations presented in version 1.0. This document is intended as a foundational reference for subsequent RDCC developments, rather than as a phenomenological model competing with $\Lambda$CDM. Part of the complete RDCC ecosystem: https://zenodo.org/records/18204087 Michael Lehmann mi.lehmann@gmx.de

This version supersedes v1.0 as the current reference version of the RDCC core framework. A concise structural manifesto clarifying the scope, limits, and foundational stance of RDCC is provided in a separate companion document. https://zenodo.org/records/18116675