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/memory-pressure/module.json.captured

@@ -0,0 +1,130 @@
+{
+  "module": "memory-pressure",
+  "version": "1",
+  "capabilities": [
+    "package-manager",
+    "service-manager"
+  ],
+  "emits": [
+    "pressure.high",
+    "pressure.cleared"
+  ],
+  "tools": [
+    "memory_status",
+    "memory_top",
+    "memory_oom_history",
+    "memory_zram",
+    "memory_oomd",
+    "memory_guard"
+  ],
+  "resources": [
+    {
+      "id": "zram-generator",
+      "type": "package",
+      "package": "zram-generator"
+    },
+    {
+      "id": "zram",
+      "type": "file",
+      "path": "/etc/systemd/zram-generator.conf",
+      "mode": "0644",
+      "template": "files/zram-generator.conf"
+    },
+    {
+      "id": "sysctl-drop-ins",
+      "type": "directory",
+      "path": "/etc/sysctl.d",
+      "mode": "0755",
+      "unknown": "program"
+    },
+    {
+      "id": "swap-tunables",
+      "type": "file",
+      "path": "/etc/sysctl.d/90-memory-pressure.conf",
+      "mode": "0644",
+      "template": "files/sysctl.conf"
+    },
+    {
+      "id": "sysctl",
+      "type": "service",
+      "unit": "systemd-sysctl.service",
+      "restart-on": [
+        "swap-tunables"
+      ]
+    },
+    {
+      "id": "oomd-drop-ins",
+      "type": "directory",
+      "path": "/etc/systemd/oomd.conf.d",
+      "mode": "0755",
+      "unknown": "program"
+    },
+    {
+      "id": "oomd-limits",
+      "type": "file",
+      "path": "/etc/systemd/oomd.conf.d/memory-pressure.conf",
+      "mode": "0644",
+      "template": "files/oomd.conf"
+    },
+    {
+      "id": "root-slice-drop-ins",
+      "type": "directory",
+      "path": "/etc/systemd/system/-.slice.d",
+      "mode": "0755",
+      "unknown": "program"
+    },
+    {
+      "id": "root-slice",
+      "type": "file",
+      "path": "/etc/systemd/system/-.slice.d/10-oomd.conf",
+      "mode": "0644",
+      "template": "files/root-slice.conf"
+    },
+    {
+      "id": "user-manager-drop-ins",
+      "type": "directory",
+      "path": "/etc/systemd/system/user@.service.d",
+      "mode": "0755",
+      "unknown": "program"
+    },
+    {
+      "id": "user-manager",
+      "type": "file",
+      "path": "/etc/systemd/system/user@.service.d/10-oomd.conf",
+      "mode": "0644",
+      "template": "files/user-manager.conf"
+    },
+    {
+      "id": "oomd",
+      "type": "service",
+      "unit": "systemd-oomd.service",
+      "state": "running",
+      "boot": "enabled",
+      "restart-on": [
+        "oomd-limits",
+        "root-slice",
+        "user-manager"
+      ]
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools-go",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/memory-pressure",
+        "binary": "memory-pressure",
+        "loads": [
+          "memory-pressure"
+        ]
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
+      }
+    ]
+  }
+}