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/zsh/module.json.captured

@@ -0,0 +1,160 @@
+{
+  "module": "zsh",
+  "version": "1",
+  "moved": true,
+  "capabilities": [
+    "package-manager"
+  ],
+  "claims": [
+    {
+      "name": "node-login-shell",
+      "scope": "node",
+      "serves": [
+        "execute"
+      ]
+    }
+  ],
+  "tools": [
+    "zsh_config"
+  ],
+    "config": {
+      "execute": {
+        "type": "string",
+        "description": "Whether this machine offers execute, which runs any command as the operator account and so can become root without a person: serve, or withhold on a machine that does not offer it (novox/hq ADR 0268), such as the control-node until a call to it needs a person's approval.",
+        "enum": [
+          "serve",
+          "withhold"
+        ],
+        "trusted": true,
+        "default": "serve"
+      }
+    },
+  "items": [
+    {
+      "collection": "environment",
+      "name": "editor",
+      "attributes": {
+        "kind": "variable",
+        "name": "EDITOR"
+      },
+      "template": "files/env-editor"
+    },
+    {
+      "collection": "environment",
+      "name": "visual",
+      "attributes": {
+        "kind": "variable",
+        "name": "VISUAL"
+      },
+      "template": "files/env-visual"
+    },
+    {
+      "collection": "environment",
+      "name": "xdg-config-home",
+      "attributes": {
+        "kind": "variable",
+        "name": "XDG_CONFIG_HOME"
+      },
+      "template": "files/env-xdg-config-home"
+    },
+    {
+      "collection": "environment",
+      "name": "path-local-bin",
+      "attributes": {
+        "kind": "path",
+        "at": "start",
+        "order": "10"
+      },
+      "template": "files/env-path-local-bin"
+    },
+    {
+      "collection": "environment",
+      "name": "path-scripts",
+      "attributes": {
+        "kind": "path",
+        "at": "start",
+        "order": "20"
+      },
+      "template": "files/env-path-scripts"
+    },
+    {
+      "collection": "environment",
+      "name": "path-scripts-bin",
+      "attributes": {
+        "kind": "path",
+        "at": "start",
+        "order": "30"
+      },
+      "template": "files/env-path-scripts-bin"
+    }
+  ],
+  "resources": [
+    {
+      "id": "package",
+      "type": "package",
+      "package": "zsh"
+    },
+    {
+      "id": "env",
+      "type": "file",
+      "path": "${machine:account-home}/.zshenv",
+      "owner": "${machine:account}",
+      "mode": "0644",
+      "into": "block",
+      "at": "start",
+      "template": "files/zshenv"
+    },
+    {
+      "id": "rc",
+      "type": "file",
+      "path": "${machine:account-home}/.zshrc",
+      "owner": "${machine:account}",
+      "mode": "0644",
+      "into": "block",
+      "at": "start",
+      "template": "files/zshrc"
+    },
+    {
+      "id": "login",
+      "type": "user",
+      "name": "${machine:account}",
+      "shell": "/usr/bin/zsh"
+    },
+    {
+      "id": "state",
+      "type": "directory",
+      "place": ".",
+      "owner": "root",
+      "mode": "0755",
+      "unknown": "program"
+    },
+    {
+      "id": "tools-conf",
+      "type": "file",
+      "path": "${dir:state}/tools.conf",
+      "owner": "root",
+      "mode": "0644",
+      "template": "files/tools.conf"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "typescript",
+        "entrypoints": [
+          "tools/index.js"
+        ],
+        "env": {
+          "ZSH_TOOLS_CONF": "${dir:state}/tools.conf"
+        }
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
+      }
+    ]
+  }
+}