E.20:10 - Rationale
Mechanism declarations are high-leverage epistemes: a small change can affect suites, planned baselines, wiring modules, evaluations, and evidence uses. Without a protocol, the corpus tends toward semantic duplication across governing loci, so a reader cannot recover which declaration or neighboring relation actually changed.
Governing-definition-directed authoring is a pragmatic compromise: it does not depend on tooling, yet it gives a stable governing-definition map that enables subsequent review and refresh.