Executable Metaphysics introduces a groundbreaking framework that unifies metaphysics, computation, and recursive intelligence. Rooted in the philosophy of Baruch Spinoza, this book proposes that adequacy - the internal clarity of thought and cause - is not just a measure of knowledge, but a universal standard for intelligence, ethics, and freedom. Ashkenazi constructs a multi-layered epistemic system where ideas are treated as code, reflections are recursively evaluated, and emotions are measured as transitions in adequacy. The book introduces four original systems: The Noēsis Protocol - a causal journaling system for recursive self-clarification. SpiñO - an AI coach that reflects emotions back through causal understanding. Phýsis - a programming language where only causally valid ideas can execute. Proof of Adequacy - a new consensus mechanism that verifies thoughts not by popularity or belief, but by their recursive causal integrity. With examples from artificial intelligence, ethics, psychology, and system design, Executable Metaphysics makes a radical claim: that truth is not what we agree on, but what we understand. This is not just a book - it is a philosophical engine, a recursive mirror, and an invitation to build systems that think about thinking. Whether you're a philosopher, system designer, or curious mind, this book offers a path toward clarity, freedom, and the architecture of thought itself.