Chapter 20: The Spectral Algebra Complete

Chapters 14–19 have built a spectral toolkit from scratch, every tool earned constructively from five generators and seven axioms. This chapter takes stock. We compile the complete spectral vocabulary—nine tools that form a closed kit—and introduce the Coherence Checklist Template, a five-step protocol for reformulating each millennium problem as a Mutual Determination instance. Export contracts specify which tools each problem requires. The earned spectral algebra is sufficient for all eight millennium approaches; no additional infrastructure needs to be imported. Part III is complete.