C2b: a seat verb's no responders is a transport fault when the assigner names a holder of the seat; a seat nothing holds fails at once (ADR 0664 §1, issue 1748)

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

modules/mesh-build-node/cmd/mesh-build-node/build.go

@@ -168,7 +168,7 @@ func (m *Module) build(ctx context.Context, args map[string]any) (any, error) {
 	// Published from this process once the build ended, a candidate's as a trunk build's (ADR 0498 §1 §2; CAT-BN3): the
 	// step answers the seat's reference, or fails not stored. The packed bytes are never written to the node (L9).
 	if err := m.publishOn(ctx, buildstep.ArtifactSeat, a.module+"/"+a.Name, "bundle", "", digest, archive); err != nil {
-		return nil, fmt.Errorf("%s%s: %v", builds.NotStored, a.Name, err)
+		return nil, fmt.Errorf("%s%s: %w", builds.NotStored, a.Name, err)
 	}
 	files := []string{}
 	_ = filepath.WalkDir(bundleDir, func(p string, d os.DirEntry, err error) error {

modules/mesh-build-node/cmd/mesh-build-node/package.go

@@ -551,7 +551,7 @@ func (m *Module) buildPackage(ctx context.Context, workspace, module, root, dir,
 		return res, nil
 	}
 	if err := m.publishOn(ctx, seat, p.Name, "package", p.Version, p.Digest, p.tgz); err != nil {
-		return nil, fmt.Errorf("%s%s: %v", builds.NotStored, a.Name, err)
+		return nil, fmt.Errorf("%s%s: %w", builds.NotStored, a.Name, err)
 	}
 	res.Reference = p.Name + "@" + p.Version
 	return res, nil

modules/mesh-build-node/cmd/mesh-build-node/push_test.go

@@ -17,6 +17,7 @@ import (
 
 	"git.novox.be/novox/mesh-catalog/modules/mesh-build-go/buildstep"
 	builds "git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds"
+	sdkstep "git.novox.be/novox/mesh-delivery/sdk/buildstep"
 )
 
 // pushed are the blobs the fake holder took, by digest, for the tests that read an archive back.
@@ -130,6 +131,18 @@ func TestARefusedPushFailsNotStoredAndNoPackedFileStays(t *testing.T) {
 		if c.words != "" && (err == nil || !strings.HasPrefix(err.Error(), builds.NotStored+"tools: ") || !strings.Contains(err.Error(), c.words)) {
 			t.Errorf("a refused publish answered %v", err)
 		}
+		if c.noSeat {
+			// ADR 0664 §1: with a holder named by the assigner the same words are a transport fault, the bus gives the ask again.
+			m.Call = func(key string, _ any) (json.RawMessage, error) {
+				if key == buildstep.AssignerHolders {
+					return json.RawMessage(`{"seats":[{"seat":"oci-artifact-registry","holders":[{"module":"mesh-registry","node":"novox"}]}],"holds":1}`), nil
+				}
+				return nil, errors.New("nats: no responders available for request")
+			}
+			if _, err := m.build(context.Background(), buildArgs()); err == nil || !sdkstep.IsPassing(err) || !strings.Contains(err.Error(), "the holder is silent") {
+				t.Errorf("no responders with a holder named answered %v, want a transport fault", err)
+			}
+		}
 		var archives []string
 		filepath.WalkDir(work, func(p string, d os.DirEntry, err error) error {
 			if err == nil && strings.HasSuffix(p, ".tar.gz") {

modules/mesh-build-node/go.mod

@@ -94,6 +94,7 @@ require git.novox.be/novox/mesh-catalog/modules/ssh-client/sshkeys v0.0.0-000101
 replace git.novox.be/novox/mesh-catalog/modules/ssh-client/sshkeys => ../ssh-client/sshkeys
 
 require (
+	git.novox.be/novox/mesh-contracts/go/seats/meshmoduleassigner v0.0.0-00010101000000-000000000000 // indirect
 	git.novox.be/novox/mesh-delivery/contracts/go/clients/gopackageregistryclient v0.0.0-00010101000000-000000000000 // indirect
 	git.novox.be/novox/mesh-delivery/contracts/go/clients/meshcatalogclient v0.0.0-00010101000000-000000000000 // indirect
 	git.novox.be/novox/mesh-delivery/contracts/go/clients/npmpackageregistryclient v0.0.0-00010101000000-000000000000 // indirect

modules/mesh-build-node/module.json

@@ -76,7 +76,8 @@
     "seat:oci-artifact-registry.publish",
     "seat:oci-artifact-registry.publish-part",
     "seat:npm-package-registry.publish",
-    "seat:npm-package-registry.publish-part"
+    "seat:npm-package-registry.publish-part",
+    "seat:mesh-module-assigner.assignments"
   ],
   "own-secrets": {
     "broker": "${dir:state}/broker"