force version 18 of node.

Author: Test

.npmrc

@@ -1,3 +1,4 @@
 //registry.npmjs.org/:_authToken=${NODE_AUTH_TOKEN}
 registry=https://registry.npmjs.org/
-always-auth=true
+always-auth=true
+engine-strict=true

package.json

@@ -1,6 +1,6 @@
 {
   "name": "command-ai",
-  "version": "0.29.0",
+  "version": "0.30.0",
   "description": "Command AI",
   "main": "ai.js",
   "type": "module",
@@ -59,5 +59,8 @@
     "globals": "^15.8.0",
     "prettier": "^3.3.2",
     "prettier-eslint": "^16.3.0"
+  },
+  "engines": {
+    "node": ">=18.0.0"
   }
 }