This document is the constitution of SonderMind AI, outlining its commitment to ethical, transparent, and clinically aligned AI in mental health. It details the principles guiding SonderMind AI, including clinician-guided development, client control and consent, privacy by design, and accountability and transparency. The document also highlights SonderMind's unique features, such as its clinician-developed tools, HIPAA and ISO 27001 certification, and the absence of data monetization. It emphasizes the governance of AI by a committee that includes licensed mental health professionals, product and clinical leadership, legal, privacy, and compliance experts, and machine learning engineers.