Use real type=module package

ember-string/.attw.json

@@ -0,0 +1,3 @@
+{
+  "ignoreRules": ["cjs-resolves-to-esm"]
+}

ember-string/package.json

@@ -2,9 +2,7 @@
   "name": "@ember/string",
   "version": "3.1.1",
   "description": "A set of utilities to transform strings",
-  "keywords": [
-    "ember-addon"
-  ],
+  "type": "module",
   "repository": "https://github.com/emberjs/ember-string",
   "license": "MIT",
   "author": "",
@@ -35,14 +33,15 @@
     "lint:js": "eslint . --cache",
     "lint:js:fix": "eslint . --fix",
     "lint:types": "tsc --noEmit --emitDeclarationOnly false",
+    "lint:package": "publint",
+    "lint:published-types": "attw --pack",
     "start": "concurrently 'npm:start:*'",
     "start:js": "rollup --config --watch --no-watch.clearScreen",
     "start:types": "tsc --declaration --watch",
     "test": "echo 'A v2 addon does not have tests, run tests in test-app'",
     "prepack": "rollup --config"
   },
   "dependencies": {
-    "@embroider/addon-shim": "^1.8.7",
     "decorator-transforms": "^1.0.1"
   },
   "devDependencies": {
@@ -72,15 +71,6 @@
   "publishConfig": {
     "registry": "https://registry.npmjs.org"
   },
-  "ember": {
-    "edition": "octane"
-  },
-  "ember-addon": {
-    "version": 2,
-    "type": "addon",
-    "main": "addon-main.cjs",
-    "app-js": {}
-  },
   "volta": {
     "extends": "../package.json"
   }

ember-string/rollup.config.mjs

@@ -22,16 +22,6 @@ export default {
     // See https://github.com/embroider-build/embroider/blob/main/docs/v2-faq.md#how-can-i-define-the-public-exports-of-my-addon
     addon.publicEntrypoints(['**/*.js', 'index.js', 'template-registry.js']),
 
-    // These are the modules that should get reexported into the traditional
-    // "app" tree. Things in here should also be in publicEntrypoints above, but
-    // not everything in publicEntrypoints necessarily needs to go here.
-    addon.appReexports([
-      'components/**/*.js',
-      'helpers/**/*.js',
-      'modifiers/**/*.js',
-      'services/**/*.js',
-    ]),
-
     // Follow the V2 Addon rules about dependencies. Your code can import from
     // `dependencies` and `peerDependencies` as well as standard Ember-provided
     // package names.
@@ -48,16 +38,6 @@ export default {
       babelHelpers: 'bundled',
     }),
 
-    // Ensure that standalone .hbs files are properly integrated as Javascript.
-    addon.hbs(),
-
-    // Ensure that .gjs files are properly integrated as Javascript
-    addon.gjs(),
-
-    // addons are allowed to contain imports of .css files, which we want rollup
-    // to leave alone and keep in the published output.
-    addon.keepAssets(['**/*.css']),
-
     // Remove leftover build artifacts when starting a new build.
     addon.clean(),
 

package.json

@@ -24,5 +24,9 @@
     "overrides": {
       "@types/eslint": "^7.0.0"
     }
+  },
+  "devDependencies": {
+    "@arethetypeswrong/cli": "^0.15.0",
+    "publint": "^0.2.7"
   }
 }