The registry is added, not built

A mesh that has just bootstrapped cannot build the module that gives it
an artifact store: building publishes to the store, and the builder will
not start without one (novox/hq 04-ISSUES/029).

This test built it and passed, because the scenario's registry was
already standing to receive the push — which is precisely why a real
first mesh would have hit this and the lab never did. A stand-in for
Docker Hub was quietly also standing in for the thing under test.

So the module now names its image by digest, the way the bundle names
the three a first node starts from, and is added as a manifest rather
than built. That is the only path open to a real first mesh, so it is
the path this walks.

Its skip on MESH_LAB_BUILDER goes with it. Nothing in the test needs a
builder any more, and a skip that names a thing the test does not use
sends the next person to look in the wrong place.

test/integration/mesh.test.ts

@@ -586,30 +586,34 @@ test("a machine that fell behind catches up without being named", { skip, timeou
   assert.match(await mesh("push --behind"), /every machine is doing what it was told/);
 });
 
-test("the mesh runs its own artifact store", {
-  skip: skip || (!builder ? "set MESH_LAB_BUILDER to a built mesh-builder" : false),
-  timeout: 900_000,
-}, async () => {
+test("the mesh runs its own artifact store", { skip, timeout: 900_000 }, async () => {
   // Artifacts go to a registry, and the only registries that existed were raised by the lab or by
   // the bootstrap bundle. A mesh had no way to run its own.
   //
-  // Chicken and egg, resolved the way the bootstrap's is: the scenario's registry serves the image
-  // the module mirrors, and the module then runs a registry of the mesh's own.
+  // **Named, not mirrored** (novox/hq 04-ISSUES/029). Mirroring publishes to the artifact store,
+  // and the builder will not start without one — so a module that provides the store and builds
+  // its own image asks the mesh to put an artifact into the thing that artifact is needed to
+  // create. It worked here only because the scenario's registry was already standing to receive
+  // the push, which is exactly why a real first mesh would have found this and the lab did not.
+  //
+  // So the image is named by digest, the way the bundle names the three a first node starts from.
+  // A registry is the one module that cannot be delivered by the mesh's own delivery.
   await must("anchor", `mkdir -p /root/registry && printf %s '{"module":"registry","version":"1",` +
     `"provides":[{"name":"artifact-store","scope":"mesh"}],` +
     `"capabilities":["container-runtime"],` +
     `"claims":[{"name":"the-artifact-store","scope":"node"}],` +
     `"serves":{"artifact-store":{"port":5000}},` +
-    `"build":{"artifacts":[{"name":"registry","kind":"upstream","from":"${pinned("registry")}"}]},` +
     `"resources":[` +
     `{"id":"state","type":"directory","path":"/var/lib/mesh/registry","mode":"0700"},` +
-    `{"id":"store","type":"container","name":"mesh-registry","artifact":"registry",` +
+    `{"id":"store","type":"container","name":"mesh-registry","image":"${pinned("registry")}",` +
     `"ports":["5000:5000"],"volumes":["mesh-registry-data:/var/lib/registry"]}]}' ` +
     `> /root/registry/module.json`);
-  await must("anchor", `cd /root/registry && git init -q . && git add -A && ` +
-    `git -c user.email=lab -c user.name=lab commit -qm registry`);
-
-  await mesh("build /root/registry --wait 300s", 420_000);
+  // **Added, not built** — and this is the half that proves the fix. Building needs a builder,
+  // and a builder will not start without an artifact store to publish to, so a mesh that has just
+  // bootstrapped cannot build the module that gives it one. Adding the manifest directly is the
+  // path a real first mesh has to take, so it is the path this walks.
+  await must("anchor", `docker cp /root/registry/module.json mesh-control:/registry.json`);
+  await mesh("module add /registry.json");
   await mesh("assign anchor registry");
   await mesh("push anchor");
   await new Promise((r) => setTimeout(r, 12_000));