The checker's fetch pins only the zero-version requirements a directory's go.mod names
(mesh-build-go workspace.go goModOf), so a module reached only through another, such as
meshhandacts through meshhandactsclient or mesh-delivery-sdk through meshcatalogclient,
was never downloaded and the shut-off load failed (fetch.go:267). The join's merges had
dropped these indirect requirements that the trunk's go.mod files list.
Builds: design 47 G (join 11, the check's fetch of the group's modules)
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h