Energy-Flow Cosmology (EFC v2.1) is a unified thermodynamic framework in which a continuous energy–entropy flow field generates the structure, dynamics, and cognition of the Universe.Matter, spacetime, and awareness are treated as localized modes of an underlying energy-flow continuum operating between two thermodynamic boundaries: S = 0 (perfect order, the Singularity) and S = 1 (maximal entropy, the Altular limit).The Complete Edition (v2A) consolidates all DOI-anchored modules published between 2024 and 2025 into one coherent reference:EFC-S (Grid–Higgs / Halo Model of Entropy),EFC-D (Field Equations for Entropy-Driven Spacetime),EFC-C (CEM-Cosmos — Cognitive Thermodynamics),EFI (Energy-Flow Interface / CDVC), and the newly formalized Intelligence–Matter Exchange (IMX) appendix.EFC replaces the dark-sector assumptions of ΛCDM with a falsifiable, energy-driven cosmology governed by continuous thermodynamic symmetry:order ↔ flow ↔ entropy ↔ awareness.The new IMX field equation introduces a dynamic coupling between informational and energetic flow, bridging biological and artificial systems through a shared thermodynamic principle.Validated against current datasets (Planck, JWST, DESI, Euclid, LIGO), the model predicts measurable signatures in CMB anisotropies, H₀ tension, and gravitational lensing without invoking dark matter or dark energy.EFC v2.1 thus provides a reproducible, cross-disciplinary framework linking physics, thermodynamics, and cognition within a single, continuous energy-flow field.