Remove /// <reference types='ember-sources/types

addon/package.json

@@ -46,18 +46,14 @@
   ],
   "repository": "https://github.com/ember-cli/ember-page-title",
   "scripts": {
-    "build": "concurrently 'npm:build:*'",
-    "build:js": "rollup --config",
-    "build:types": "glint --declaration",
+    "build": "rollup --config",
     "lint": "concurrently 'npm:lint:*(!fix)' --names 'lint:'",
     "lint:fix": "concurrently 'npm:lint:*:fix' --names 'fix:'",
     "lint:js": "eslint . --cache",
     "lint:js:fix": "eslint . --fix",
     "lint:types": "glint --declaration",
     "prepack": "rollup --config",
-    "start": "concurrently 'npm:start:*'",
-    "start:js": "rollup --config --watch --no-watch.clearScreen",
-    "start:types": "glint --declaration --watch"
+    "start": "rollup --config --watch --no-watch.clearScreen"
   },
   "dependencies": {
     "@embroider/addon-shim": "^1.8.7",
@@ -90,6 +86,8 @@
     "eslint-plugin-jsonc": "^2.11.2",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^5.1.2",
+    "execa": "^8.0.1",
+    "fix-bad-declaration-output": "^1.0.1",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.1.1",
     "rollup": "^4.9.1",

addon/rollup.config.mjs

@@ -1,5 +1,6 @@
 import { babel } from '@rollup/plugin-babel';
 import { Addon } from '@embroider/addon-dev/rollup';
+import { execaCommand } from 'execa';
 
 const addon = new Addon({
   srcDir: 'src',
@@ -41,5 +42,31 @@ export default {
 
     // Remove leftover build artifacts when starting a new build.
     addon.clean(),
+
+    {
+      name: 'fix-bad-declaration-output',
+      closeBundle: async () => {
+        /**
+         * Generate the types (these include /// <reference types="ember-source/types"
+         * but our consumers may not be using those, or have a new enough ember-source that provides them.
+         */
+        console.log('Building types');
+        await execaCommand(`pnpm glint --declaration`, { stdio: 'inherit' });
+        /**
+         * https://github.com/microsoft/TypeScript/issues/56571#
+         * README: https://github.com/NullVoxPopuli/fix-bad-declaration-output
+         */
+        console.log('Fixing types');
+        await execaCommand(
+          `pnpm fix-bad-declaration-output declarations/**/*.d.ts`,
+          {
+            stdio: 'inherit',
+          },
+        );
+        console.log(
+          '⚠️ Dangerously (but neededly) fixed bad declaration output from typescript',
+        );
+      },
+    },
   ],
 };