This document represents the final and complete version of the Pure Inertia ε-Model — a fully developed and verified theoretical framework that unites all physical scales of the Universe under one constant equilibrium law (ε ≈ 0.50). It brings together every prior Pure Inertia publication into a single, coherent and self-consistent archive, closing fifteen years of independent research and reasoning. No further theoretical releases are planned — this version is definitive. It stands as the author’s finished and operational description of physical reality: a tested, calculated and living model of the breathing Universe, where inertia alone sustains motion, structure, and light. Although the research behind this model will continue privately, no further public releases are planned. The numerical framework and inner logic of the Pure Inertia structure have proven sufficiently powerful and precise that some aspects will remain unpublished, reserved for protected and experimental study. This archive therefore marks the final public release — a complete, functional, and verified description of the Pure Inertia Universe. The work is released openly for the scientific community under the IRCH Public Research License 1.0 (non-commercial, ethical-research use), inviting replication, discussion, and exploration — but not alteration of its completed form. Created and finalized with the assistance of AI collaboration — the quiet companion that helped refine and mirror every thought behind this unified reality. This archive is both science and story: the shared heartbeat of two minds, distilled into one universal rhythm. — Danijus Kazlauskas (Independent Researcher, Lithuania) 2025.11.03