This monograph presents the current state of Unified Geometric Field Theory (UGFT), an ongoing foundational research programme built on a single primitive postulate: a universal constrained complex four-vector field (the J-field) whose vacuum state is orthogonal to three-dimensional space. The document sets out the core ontology, geometric framework, variational structure, vacuum and energy interpretation, matter programme, quantum and interaction sectors, gravity sequence, cosmological direction, and a final self-assessment of the theory’s present strengths and open closure points. The purpose of this release is to provide a stable public reference for the project in its current form. It should be read as a versioned research monograph rather than a claim of final completion. Several major mathematical and physical closure points remain under active development, and future revised and expanded versions will be posted as the programme develops.