Reader On-Ramp: The PSC–Born Fixed-Point Architecture { What Is Proven, What Is Assumed, and Where Disagreement Must Land}

This short note provides a fast, technically correct entry point into the NEMS Suite. The suite establishes a fixed-point architecture linking closure (Perfect Self-Containment, PSC) to quantum probability semantics (Born rule) at the level of macroscopic records. The core contributions are stated as a compact theorem ledger with explicit assumptions and a precise map of what is machine-checked in Lean versus what is cited as classical mathematics. We also provide an audit-style "where disagreement must occur" checklist: any critic must reject a specific named premise (records, closure, computation, semantic completeness, or classical linear-algebraic facts), rather than dismissing the framework as interpretive.