Scientific Corrigenda and Regression Hardening for ARQ M2, MOT-c and C-Calculus

This author-issued corrigendum and reproducible maintenance supplement corrects three scientific-document families: ARQ M2 initial-state and resource-accounting formulas; the missing LATENT value in the English and Russian MOT-c Appendix A examples; and the C-Calculus distinction between equivalence, directed continuation and threshold resemblance, together with an explicit finite-trace adjacency convention. The package includes four complete corrected reading editions, PDF projections, unchanged source snapshots, exact source-bound edits and 29 focused first-party regression tests. It also documents the ownership O12/O13 correction and the interpretation limit of a bounded-summary substitution control. This is a supplementary correction, not a complete replacement release of the parent compound publications. Original DOI payloads and historical test evidence remain unchanged. Exact ARQ M2 membership in a particular Zenodo deposit remains unresolved; the public SER repository commit and SHA-256 identify that source. No native runtime test, independent scientific review, new model experiment, c-specific effect, consciousness, identity or economic-value result is claimed. New explanatory text is CC BY 4.0; new maintenance code is MIT; reproduced sources retain their original attribution and applicable licenses. The wording “Zenodo deposit not yet assigned” in the PDFs reflects their pre-deposit preparation status. The DOI of this Zenodo record identifies the deposited version of the unchanged release package.