This publication introduces the VIGILO Constitutional Governance Framework (VCGF), a governance architecture designed to improve accountability, traceability, reviewability and institutional memory within contemporary organisations. The publication begins from first principles and assumes no prior knowledge of governance frameworks. It examines the historical development of constitutional governance from Magna Carta, the rule of law, natural justice, parliamentary accountability and administrative accountability traditions through to modern digital institutions. The publication argues that increasing organisational complexity has created new accountability challenges including fragmented authority, loss of institutional memory, opaque decision-making processes, inconsistent review pathways and governance drift. To address these challenges, the publication introduces the VIGILO Constitutional Governance Framework and its four constitutional invariants: Authority Evidence Traceability Reviewability These invariants form the constitutional foundation of the framework and support a broader governance architecture comprising governance objects, governance registers, audit structures, extension mechanisms, compatibility models and stewardship arrangements. The publication further establishes the VIGILO Constitution v1.0, which defines the framework's purpose, constitutional principles, stewardship model, registry architecture, extension process, compatibility model and succession arrangements. The work is intended as a public governance contribution and a foundation for future standards development, training programs, certification systems, governance software platforms, academic research and institutional implementation.