E.17.1:16.3 - For integrators and librarians

Integrators should keep libraries small, curated, and editioned. Publish only the smallest declaration set the current reuse needs:

• one stable core declaration when a recurring family is established,
• one explicit local extension only when local membership or meaning changes,
• and one clear subset declaration only when the current use imports a subset.

Do not create all three by default. Library sprawl destroys the cognitive advantage that reusable bundles are supposed to provide.