The assigner follows the catalog half through meshcatalogclient's branch follower (the registrations' branches, before the first
registrations those of the gate's verb `source` and its event `source-moved`, §507, §532): its trunk is the first watched branch,
never a fixed "main" (§7). It reads neither the gate's `source` nor `merges` (§431); the Approve of a release is no yes to a move
(the release lookup goes). The follower tells a part of each branch it adopts (Branches.Adopted).
Builds: design 47 G §507, §532, §431, §7
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h