First-Classness yields a unique 64 → 21 genetic code

This archive provides the structured documentation accompanying the paper“First-Classness yields a unique 64 → 21genetic code. ” It contains the formal and architectural materials required to understand the structural claim advanced in the paper: that the canonical genetic code is not an arbitrary biochemical convention but a uniquely constrained partition of 64 canonical dispositions into 21 disjoint families with degeneracy classes 0, 1, 2, 3, 4, and 6 (where 0 corresponds to the stop codon faliy). The archive includes: SISoftwareSupplement. pdf — a reproducibility and computational guide describing the deterministic analysis pipelines used in the associated software archive (Tier-1 reviewer workflow and Tier-2 large-scale genomic workflow). This documentation is conceptually distinct from the executable software archive. It does not contain genomic datasets or runnable scripts. Instead, it provides the formal exposition, structural argument, and reproducibility map that clarify how the genetic code’s degeneracy structure arises as a constrained symmetry partition rather than as chemical redundancy. The material is intended for mathematical biologists, theoretical physicists, logicians, and reviewers seeking a structural account of codon degeneracy beyond statistical or evolutionary explanation. Together with the paper and the companion software archive, this documentation forms the interpretive layer of the project, explaining the formal framework within which the canonical 64 → 20 genetic code emerges as a unique structural configuration.