This record contains three Reality Drift Framework briefing notes examining organizational drift across institutions, leadership systems, and governance structures. The collection includes: Mission Drift: how organizations gradually lose alignment with their original purpose while remaining operational Leadership Drift: how decision-making systems become detached from frontline conditions and real-world feedback Governance Drift: how oversight systems remain formally active while losing accountability and corrective power Together, these briefing notes describe recurring patterns where organizations continue functioning structurally while weakening their relationship to mission, reality, accountability, and outcomes. The documents connect topics such as institutional drift, executive blind spots, governance failure, organizational misalignment, semantic fidelity, proxy optimization, and constraint collapse. This collection is intended for researchers, systems thinkers, organizational analysts, governance researchers, AI governance practitioners, and institutional observers interested in modern organizational failure modes and Reality Drift.