This treatise establishes the Rigor Laws of Peer Review—the constitutional, mechanism‑level invariants required for scientific validity. Drawing on Science Forensics, it demonstrates that modern peer review fails not from reviewer error but from the absence of epistemic boundaries: no universal definition of evidence, no definition of mechanism, no premise validation, no scope constraints, and no prohibition on proxy substitution. The Rigor Laws formalize the structural requirements that prevent linguistic drift, measurement drift, narrative inflation, and mechanism‑free claims. They restore the causal, empirical, and environmental architecture that scientific practice has gradually lost, providing a Core Mechanic framework that anchors scientific reasoning to mechanism, measurement, and reality.