This paper presents the "Quantum Constructor" (QC), an advanced theoretical model that explores the convergence of fault-tolerant quantum computing and macro-scale physical synthesis. Rather than focusing on incremental advancements in additive manufacturing, the framework introduces a comprehensive computational architecture capable of real-time mapping, subatomic decomposition, and localized structural reconfiguration of baryonic matter. processing core utilizing globally entangled qubit networks can calculate and actively manipulate molecular eigenstates, lowering potential barriers to dictate precise atomic rearrangements. The document outlines the five fundamental pillars of the QC architecture: the Higher Quantum Core (HQC), the Universal Atomic Sensor (UAS), the Quantum Field Manipulator (QFM), the Spatial Assembly Matrix (SAM), and the Semantic Cognitive Interface (SCI). Furthermore, it addresses the thermodynamic boundaries, energetic thresholds scaling with mass-energy equivalence (E=mc^2), and the cosmological implications of post-scarcity engineering. Author: Pajtim Bajrami Year: 2026 Category: Theoretical Physics / Quantum Information Science Licence: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)