Vanguard OS is a hyper-resilient, production-hardened Autonomous AI Quantitative Trading Operating System. It unifies a Tri-Model Machine Learning Brain (0.874 Global AUC), Multi-Timeframe Harmonic Signal Engine, High-Frequency Autonomous Judge (5s Decision Loop), Continuous Two-Way Ledger Synchronization Engine, and a Universal Multi-Asset Quantum Universe (80 Assets) into an institutional-grade trading terminal. Built with native Dual-Terminal Architecture, Vanguard OS delivers a cyberpunk command center for Desktop browsers and an ultra-optimized, touch-native standalone terminal for Mobile devices.