Feature families are sellable add-on scope, not implementation footnotes
Public feature routes surface extra capabilities such as SEO, integrations, privacy, release governance, or observability so buyers can understand the real operating surface.
Basic, Plus, and Premium remain the public add-on vocabulary even when lower tiers are not yet cleared for sale in a specific family.
Feature families point back to the packs that require or bundle them so commercial scope remains traceable.
Candidate-only capabilities are left visible and marked instead of being flattened away into generic claims.