Each named a digest produced inside a lab that no longer exists, so none of them
could be built anywhere else. They say which module they stand on now, and there
is deliberately no default — a build nobody told stops at the declaration rather
than at a reference that resolves to nothing.
A line in postgres's recipe and a one-line file in amqp-ping, both added to
move a commit and watch the mesh notice. The proofs worked; neither was meant
to stay. MESH_MODULE is set from the sealed credential at run time anyway, so
baking it in was dead weight as well as noise.
The base was a digest typed in by hand, for an image nothing in the mesh could
produce — so the graph held edges pointing at it with no version on the far end,
and the one change that reaches every module at once could never be noticed.
It is a module now, and these edges resolve.
Its provisioner container named an image nobody could produce — a zero digest
placeholder. It names an artifact instead, and the module says how to build it,
so the mesh can make the database provider the catalogue needs.
jschoubben