Integrity mechanics: ringers, disclosure, embargo

Stub. Drafted during Phase 1 IA skeleton seeding. The piece below is a one-paragraph placeholder — replace before publishing.

The Class A/B/C labeling system, .gitcheck, Devpost project-validation, and the convergence-as-integrity model in no-ground-truth domains.

This piece grounds in the principle no-ringers-without-disclosure and connects out to the cases, voices, and glossary entries that elaborate it.