The node-engine carries a module's own secrets sealed by the vault when its manifest says they are the core's credentials, pinned at mesh-sdk 4f141ff (issue 774, the operator 2026-11-03)

internal/compose/node_test.go

@@ -168,7 +168,7 @@ func TestWhatASendWouldMakeIsNamedAsForeseenAndNeverInvented(t *testing.T) {
 	in.Issued[0].ForProvider = ""
 	in.Catalogue["assistant"] = anAssistant()
 	in.Catalogue["web"] = aWebModule()
-	in.Catalogue["nats"] = catalogue.Manifest{Module: "nats", Version: "1",
+	in.Catalogue["nats"] = catalogue.Manifest{Module: "nats", Version: "1", CoreCredentials: true,
 		OwnSecrets: catalogue.OwnSecrets{"broker": {Path: "/var/lib/mesh/nats/broker", Taken: catalogue.TakenAtStart}}}
 	anchor := nodeOf(t, &in, "anchor")
 	anchor.Assigned = append(anchor.Assigned, "assistant", "web", "nats")