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/fonts/module.json.captured

@@ -0,0 +1,70 @@
+{
+  "module": "fonts",
+  "version": "1",
+  "capabilities": [
+    "package-manager"
+  ],
+  "tools": [
+    "fonts_families",
+    "fonts_match",
+    "fonts_glyph",
+    "fonts_sources",
+    "fonts_config",
+    "fonts_cache_rebuild"
+  ],
+  "resources": [
+    {
+      "id": "monospace",
+      "type": "package",
+      "package": "ttf-jetbrains-mono-nerd"
+    },
+    {
+      "id": "interface",
+      "type": "package",
+      "package": "inter-font"
+    },
+    {
+      "id": "symbols",
+      "type": "package",
+      "package": "ttf-nerd-fonts-symbols"
+    },
+    {
+      "id": "noto",
+      "type": "package",
+      "package": "noto-fonts"
+    },
+    {
+      "id": "emoji",
+      "type": "package",
+      "package": "noto-fonts-emoji"
+    },
+    {
+      "id": "defaults",
+      "type": "file",
+      "path": "${machine:account-home}/.config/fontconfig/conf.d/50-mesh-fonts.conf",
+      "owner": "${machine:account}",
+      "mode": "0644",
+      "template": "files/50-mesh-fonts.conf"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/fonts-tools",
+        "binary": "fonts-tools",
+        "loads": [
+          "fonts-tools"
+        ]
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
+      }
+    ]
+  }
+}