The node-engine owns the composition it alone runs (H1, H2)

ADR 0593 §1 and §7: compose, its bus reader and runtime reader, takein,
validate, the overlay generator, the composer's run and mesh-compose, and
the judgement of a move leave mesh-sdk for the node-engine's internal
packages, so no other module composes and a change to them rebuilds only
the node-engine. The shapes others read (the composer's request and
verdict, the overlay's names, compositions and answers) stay in mesh-sdk.
The node's grant is now a golden file of what the grants part composes,
since the composer of the bus's user list leaves mesh-sdk too.

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

cmd/mesh-compose/testdata/mesh-catalog/modules/lemurs/module.json.captured

@@ -0,0 +1,84 @@
+{
+  "module": "lemurs",
+  "version": "1",
+  "capabilities": [
+    "package-manager",
+    "service-manager",
+    "seat"
+  ],
+  "claims": [
+    {
+      "name": "node-login-manager",
+      "scope": "node",
+      "serves": [
+        "sessions"
+      ]
+    }
+  ],
+  "tools": [
+    "lemurs_default_session",
+    "lemurs_logins"
+  ],
+  "resources": [
+    {
+      "id": "package",
+      "type": "package",
+      "package": "lemurs"
+    },
+    {
+      "id": "xserver",
+      "type": "file",
+      "path": "/etc/lemurs/xserver",
+      "mode": "0755",
+      "template": "files/xserver"
+    },
+    {
+      "id": "config",
+      "type": "file",
+      "path": "/etc/lemurs/config.toml",
+      "mode": "0644",
+      "template": "files/config.toml"
+    },
+    {
+      "id": "xsessions",
+      "type": "directory",
+      "path": "/etc/lemurs/xsessions",
+      "mode": "0755",
+      "unknown": "program"
+    },
+    {
+      "id": "wayland-sessions",
+      "type": "directory",
+      "path": "/etc/lemurs/wayland-sessions",
+      "mode": "0755",
+      "unknown": "program"
+    },
+    {
+      "id": "service",
+      "type": "service",
+      "unit": "lemurs.service",
+      "state": "running",
+      "boot": "enabled"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/lemurs-tools",
+        "binary": "lemurs-tools",
+        "loads": [
+          "lemurs-tools"
+        ]
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
+      }
+    ]
+  }
+}