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/feh/module.json.captured

@@ -0,0 +1,75 @@
+{
+  "module": "feh",
+  "version": "1",
+  "moved": true,
+  "capabilities": [
+    "package-manager"
+  ],
+  "requires": [
+    "x11-display"
+  ],
+  "tools": [
+    "feh_set",
+    "feh_current"
+  ],
+  "items": [
+    {
+      "collection": "shell:xinitrc:normal",
+      "name": "xinitrc-normal",
+      "template": "files/xinitrc-normal"
+    },
+    {
+      "collection": "contribution:node-display-session:config",
+      "name": "display-session",
+      "template": "files/i3/50-feh.conf"
+    }
+  ],
+  "resources": [
+    {
+      "id": "package",
+      "type": "package",
+      "package": "feh"
+    },
+    {
+      "id": "wallpapers",
+      "type": "archive",
+      "path": "${machine:account-home}/.local/share/feh/wallpapers",
+      "owner": "${machine:account}",
+      "artifact": "wallpapers",
+      "unknown": "move-out"
+    },
+    {
+      "id": "fehbg",
+      "type": "file",
+      "path": "${machine:account-home}/.fehbg",
+      "owner": "${machine:account}",
+      "mode": "0755",
+      "template": "files/fehbg"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "wallpapers",
+        "kind": "archive",
+        "from": "wallpaper"
+      },
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/feh-tools",
+        "binary": "feh-tools",
+        "loads": [
+          "feh-tools"
+        ]
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
+      }
+    ]
+  }
+}