diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index ea94353ef8b14f..5ece5c4ce83a93 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -102,6 +102,7 @@ scripts/update-release-notes @microsoft/fluentui-react-build
 scripts/utils @microsoft/fluentui-react-build
 scripts/webpack @microsoft/fluentui-react-build
 scripts/perf-test-flamegrill @microsoft/fluentui-react-build
+scripts/bundle-size-auditor @microsoft/fluentui-react-build
 
 #### Fluent UI N*
 packages/a11y-rules @microsoft/fluentui-northstar
@@ -124,7 +125,6 @@ apps/vr-tests @microsoft/fluentui-react
 apps/vr-tests-react-components @microsoft/fluentui-react
 apps/ssr-tests @microsoft/fluentui-react
 apps/pr-deploy-site @microsoft/fluentui-react-build
-apps/test-bundles @microsoft/fluentui-react
 apps/public-docsite-v9 @microsoft/cxe-red @microsoft/cxe-coastal @microsoft/fluentui-react-build
 apps/theming-designer @microsoft/fluentui-react
 apps/ssr-tests-v9 @microsoft/fluentui-react-build
diff --git a/apps/test-bundles/.eslintrc.json b/apps/test-bundles/.eslintrc.json
deleted file mode 100644
index d5ab5e8d3bdee2..00000000000000
--- a/apps/test-bundles/.eslintrc.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-  "extends": ["plugin:@fluentui/eslint-plugin/node"],
-  "root": true,
-  "settings": {
-    "import/resolver": {
-      "typescript": {
-        "project": "../../tsconfig.json"
-      }
-    }
-  }
-}
diff --git a/apps/test-bundles/CHANGELOG.json b/apps/test-bundles/CHANGELOG.json
deleted file mode 100644
index 492c83a09e0431..00000000000000
--- a/apps/test-bundles/CHANGELOG.json
+++ /dev/null
@@ -1,321 +0,0 @@
-{
-  "name": "test-bundles",
-  "entries": [
-    {
-      "date": "Tue, 24 Aug 2021 07:34:48 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "none": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.4.1",
-            "author": "dzearing@hotmail.com",
-            "commit": "0abd957c8d4421018e6d792c2a4aa8876967392b",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Fri, 20 Aug 2021 07:37:28 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "none": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.4.0",
-            "author": "behowell@microsoft.com",
-            "commit": "21df8406417c5c5c1d053561a498b920ac962b4b",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Tue, 03 Aug 2021 07:39:30 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.3.3",
-            "author": "behowell@microsoft.com",
-            "commit": "86476ee0511ad2693c2829b959f93a87ad10f095",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Fri, 09 Jul 2021 07:39:31 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.3.2",
-            "author": "martinhochel@microsoft.com",
-            "commit": "18902eb64710aa6253a79781357b8390bb13665c",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Mon, 07 Jun 2021 07:38:15 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.3.1",
-            "author": "martinhochel@microsoft.com",
-            "commit": "f856cb3f7fbc3edb3646204c0c7e435fc7678dd1",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Thu, 20 May 2021 07:41:54 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.3.0",
-            "author": "elcraig@microsoft.com",
-            "commit": "630b71c415cd40ed0e36773eab99d62cd02a30fb",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Fri, 30 Apr 2021 07:42:23 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.2.0",
-            "author": "joschect@microsoft.com",
-            "commit": "2b62c457bb860f6675fae4acae86ee6c0b06c279",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Fri, 23 Apr 2021 07:37:10 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.1.1",
-            "author": "olfedias@microsoft.com",
-            "commit": "7d1a9a8aee217022e55b8c39c723b1390b5d8095",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Wed, 31 Mar 2021 00:53:43 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.1.0",
-            "author": "elcraig@microsoft.com",
-            "commit": "d41b79242e6b682dfa58fcd76797ecfd9146d4cf",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Fri, 26 Feb 2021 01:16:27 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "patch": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.0.1",
-            "author": "elcraig@microsoft.com",
-            "commit": "71f0a43b375b4a932ecbcf6778288422db2dc267",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Thu, 18 Feb 2021 12:27:34 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.0.0-beta.2",
-            "author": "elcraig@microsoft.com",
-            "commit": "1072765ed2e0ffda34688d84d376a8bc4bf928f0",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Mon, 15 Feb 2021 12:22:00 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react-button to v1.0.0-beta.32",
-            "author": "xgao@microsoft.com",
-            "commit": "d5a5a4f26ce900b3e1b3c0f6c46a17c2e3430439",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Fri, 12 Feb 2021 12:26:20 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react to v8.0.0-beta.54",
-            "author": "tristan.watanabe@gmail.com",
-            "commit": "bfc63e446500e60e38ac0ac0a023c7721152a832",
-            "package": "test-bundles"
-          }
-        ],
-        "none": [
-          {
-            "comment": "Bump @fluentui/react-button to v1.0.0-beta.31",
-            "author": "xgao@microsoft.com",
-            "commit": "84f36ddd24db3546e4ccb129a60f7f7f98ceefef",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Thu, 11 Feb 2021 12:18:41 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "none": [
-          {
-            "comment": "Bump @fluentui/eslint-plugin to v1.0.0-beta.1",
-            "author": "martinhochel@microsoft.com",
-            "commit": "7566015a7edd355b4fcd3796bc8f44f732ef0877",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Thu, 11 Feb 2021 00:58:10 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react to v8.0.0-beta.53",
-            "author": "elcraig@microsoft.com",
-            "commit": "70b63061357489ccc43878d0d0b054953690d5b2",
-            "package": "test-bundles"
-          }
-        ],
-        "none": [
-          {
-            "comment": "Bump @fluentui/react-button to v1.0.0-beta.30",
-            "author": "xgao@microsoft.com",
-            "commit": "69357e7a30d4c282ad82d2ecf4da6fc4b942ab99",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Wed, 10 Feb 2021 12:20:53 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react to v8.0.0-beta.52",
-            "author": "tristan.watanabe@gmail.com",
-            "commit": "06e8eda9b5b6eefb3c3c9d34a92998e605a99e8f",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Tue, 09 Feb 2021 12:24:19 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react to v8.0.0-beta.51",
-            "author": "tristan.watanabe@gmail.com",
-            "commit": "47b42efbbe9e869864973f3b2cb717e6112b8106",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Tue, 09 Feb 2021 00:56:52 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react-button to v1.0.0-beta.29",
-            "author": "humbertomakotomorimoto@gmail.com",
-            "commit": "0f46d91d5de073dc025dc8a137a8caa2eda21a08",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Mon, 08 Feb 2021 12:23:08 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react-button to v1.0.0-beta.28",
-            "author": "miroslav.stastny@microsoft.com",
-            "commit": "bca3d0d79accb3675bf3dfd49c0297e646b91d2c",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    },
-    {
-      "date": "Fri, 05 Feb 2021 12:20:17 GMT",
-      "tag": "test-bundles_v1.0.0",
-      "version": "1.0.0",
-      "comments": {
-        "prerelease": [
-          {
-            "comment": "Bump @fluentui/react to v8.0.0-beta.49",
-            "author": "czearing@outlook.com",
-            "commit": "0d0fe5677db29dc9c850a013d98fc381bc941f91",
-            "package": "test-bundles"
-          }
-        ]
-      }
-    }
-  ]
-}
diff --git a/apps/test-bundles/CHANGELOG.md b/apps/test-bundles/CHANGELOG.md
deleted file mode 100644
index b5e84cd10f92a3..00000000000000
--- a/apps/test-bundles/CHANGELOG.md
+++ /dev/null
@@ -1,157 +0,0 @@
-# Change Log - test-bundles
-
-This log was last generated on Tue, 03 Aug 2021 07:39:30 GMT and should not be manually modified.
-
-<!-- Start content -->
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Tue, 03 Aug 2021 07:39:30 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.3.3 ([PR #19169](https://github.com/microsoft/fluentui/pull/19169) by behowell@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Fri, 09 Jul 2021 07:39:31 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.3.2 ([PR #18808](https://github.com/microsoft/fluentui/pull/18808) by martinhochel@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Mon, 07 Jun 2021 07:38:15 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.3.1 ([PR #18437](https://github.com/microsoft/fluentui/pull/18437) by martinhochel@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Thu, 20 May 2021 07:41:54 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.3.0 ([PR #18024](https://github.com/microsoft/fluentui/pull/18024) by elcraig@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Fri, 30 Apr 2021 07:42:23 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.2.0 ([PR #17932](https://github.com/microsoft/fluentui/pull/17932) by joschect@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Fri, 23 Apr 2021 07:37:10 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.1.1 ([PR #17894](https://github.com/microsoft/fluentui/pull/17894) by olfedias@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Wed, 31 Mar 2021 00:53:43 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.1.0 ([PR #17568](https://github.com/microsoft/fluentui/pull/17568) by elcraig@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Fri, 26 Feb 2021 01:16:27 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Patches
-
-- Bump @fluentui/eslint-plugin to v1.0.1 ([PR #17169](https://github.com/microsoft/fluentui/pull/17169) by elcraig@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Thu, 18 Feb 2021 12:27:34 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/eslint-plugin to v1.0.0-beta.2 ([PR #16975](https://github.com/microsoft/fluentui/pull/16975) by elcraig@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Mon, 15 Feb 2021 12:22:00 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/react-button to v1.0.0-beta.32 ([PR #16880](https://github.com/microsoft/fluentui/pull/16880) by xgao@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Fri, 12 Feb 2021 12:26:20 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/react to v8.0.0-beta.54 ([PR #16849](https://github.com/microsoft/fluentui/pull/16849) by tristan.watanabe@gmail.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Thu, 11 Feb 2021 00:58:10 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/react to v8.0.0-beta.53 ([PR #16895](https://github.com/microsoft/fluentui/pull/16895) by elcraig@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Wed, 10 Feb 2021 12:20:53 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/react to v8.0.0-beta.52 ([PR #16873](https://github.com/microsoft/fluentui/pull/16873) by tristan.watanabe@gmail.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Tue, 09 Feb 2021 12:24:19 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/react to v8.0.0-beta.51 ([PR #16832](https://github.com/microsoft/fluentui/pull/16832) by tristan.watanabe@gmail.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Tue, 09 Feb 2021 00:56:52 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/react-button to v1.0.0-beta.29 ([PR #16742](https://github.com/microsoft/fluentui/pull/16742) by humbertomakotomorimoto@gmail.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Mon, 08 Feb 2021 12:23:08 GMT 
-[Compare changes](https://github.com/microsoft/fluentui/compare/test-bundles_v1.0.0..test-bundles_v1.0.0)
-
-### Changes
-
-- Bump @fluentui/react-button to v1.0.0-beta.28 ([PR #16844](https://github.com/microsoft/fluentui/pull/16844) by miroslav.stastny@microsoft.com)
-
-## [1.0.0](https://github.com/microsoft/fluentui/tree/test-bundles_v1.0.0)
-
-Fri, 05 Feb 2021 12:20:17 GMT
-
-### Changes
-
-- Bump @fluentui/react to v8.0.0-beta.49 ([PR #15707](https://github.com/microsoft/fluentui/pull/15707) by czearing@outlook.com)
diff --git a/apps/test-bundles/just.config.ts b/apps/test-bundles/just.config.ts
deleted file mode 100644
index 73a68e195f0336..00000000000000
--- a/apps/test-bundles/just.config.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import * as path from 'path';
-import { preset, task, series } from '@fluentui/scripts-tasks';
-// eslint-disable-next-line @typescript-eslint/ban-ts-comment
-// @ts-ignore - parallel-webpack has no types
-import { run } from 'parallel-webpack';
-
-import { bundleSizeCollect } from './scripts/bundle-size-collect';
-import { mergeBundleSizes } from './scripts/merge-bundlesizes';
-
-preset();
-
-// This pacakge doesn't currently have any files that are included in the eslint task
-// (it only runs on src, not config files)
-task('code-style', 'prettier');
-
-task('bundle-size-collect', () => {
-  const packageName = process.env.PACKAGE ?? '';
-  bundleSizeCollect({ packageName });
-});
-
-task('bundle', done => {
-  const configPath = path.join(__dirname, 'webpack.config.js');
-  const options = {};
-  run(configPath, options, done);
-});
-
-task('bundle-size-merge', () => {
-  const root = path.join(__dirname, 'dist');
-  mergeBundleSizes(
-    [path.join(root, 'react/bundlesize.json'), path.join(root, 'react-northstar/bundlesize.json')],
-    path.join(root, 'bundlesizes.json'),
-  );
-});
-
-task('bundle-size', series('bundle', 'bundle-size-collect'));
diff --git a/apps/test-bundles/package.json b/apps/test-bundles/package.json
deleted file mode 100644
index 6218993d71f9d0..00000000000000
--- a/apps/test-bundles/package.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "name": "@fluentui/test-bundles",
-  "version": "1.0.0",
-  "description": "Testing Fluent UI React bundle sizes.",
-  "private": true,
-  "license": "MIT",
-  "scripts": {
-    "bundle-size-auditor": "just-scripts bundle-size",
-    "clean": "just-scripts clean",
-    "code-style": "just-scripts code-style",
-    "just": "just-scripts"
-  },
-  "devDependencies": {
-    "@fluentui/eslint-plugin": "*",
-    "@fluentui/scripts-tasks": "*",
-    "@fluentui/scripts-webpack": "*"
-  }
-}
diff --git a/apps/test-bundles/scripts/bundle-size-collect.ts b/apps/test-bundles/scripts/bundle-size-collect.ts
deleted file mode 100644
index 3128e8a100ceb9..00000000000000
--- a/apps/test-bundles/scripts/bundle-size-collect.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-import * as fs from 'fs';
-import * as path from 'path';
-
-/**
- *
- * collates bundle size information from minified files in apps/test-bundles/dist/<packageName> and writes to apps/test-bundles/dist/<packageName>/bundlesizes.json.
- *
- * It is uploaded as an artifact by the build definition in Azure Dev Ops and used to compare baseline and PR file size information which gets reported by Size Auditor
- */
-export function bundleSizeCollect(config: { packageName: string; filename?: string }) {
-  const { packageName, filename: outputFilename = 'bundlesize.json' } = config;
-
-  if (!packageName) {
-    throw new Error('🚨 No packageName provided! Set it via env variable name "PACKAGE"');
-  }
-
-  const distRoot = path.join(__dirname, '../dist', packageName.replace('@fluentui/', ''));
-
-  const sizes: Record<string, number> = {};
-
-  const items = fs.readdirSync(distRoot);
-  items.forEach(item => {
-    const file = path.join(distRoot, item);
-
-    const isMinifiedJavascriptFile = item.match(/.min.js$/);
-    if (isMinifiedJavascriptFile) {
-      sizes[getComponentName(item)] = getFilesizeInBytes(file);
-    }
-  });
-
-  fs.writeFileSync(path.join(distRoot, outputFilename), JSON.stringify({ sizes }));
-
-  function getFilesizeInBytes(fileName: string) {
-    return fs.statSync(fileName).size;
-  }
-
-  function getComponentName(fileName: string) {
-    return path.basename(fileName, '.min.js');
-  }
-}
diff --git a/apps/test-bundles/scripts/merge-bundlesizes.ts b/apps/test-bundles/scripts/merge-bundlesizes.ts
deleted file mode 100644
index 3c1b484b44f5e2..00000000000000
--- a/apps/test-bundles/scripts/merge-bundlesizes.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import * as fs from 'fs';
-
-export function mergeBundleSizes(configPaths: string[], mergeConfigPath: string) {
-  const result: { sizes: { [entryName: string]: number } } = {
-    sizes: {},
-  };
-
-  configPaths.forEach(configPath => {
-    const json = JSON.parse(fs.readFileSync(configPath, 'utf-8'));
-    Object.assign(result.sizes, json.sizes);
-  });
-
-  fs.writeFileSync(mergeConfigPath, JSON.stringify(result));
-}
diff --git a/apps/test-bundles/webpack.config.js b/apps/test-bundles/webpack.config.js
deleted file mode 100644
index 958f7f341c40d0..00000000000000
--- a/apps/test-bundles/webpack.config.js
+++ /dev/null
@@ -1,47 +0,0 @@
-/* eslint-disable no-shadow */
-
-// @ts-check
-const {
-  buildEntries,
-  buildEntry,
-  createWebpackConfig,
-  createFluentNorthstarFixtures,
-  createFluentReactFixtures,
-  createEntry,
-} = require('./webpackUtils');
-
-/**
- *
- * @param {string} packageName
- * @returns
- */
-function getEntries(packageName) {
-  if (packageName === '@fluentui/react-northstar') {
-    createFluentNorthstarFixtures();
-    const entries = buildEntries('@fluentui/react-northstar');
-    return entries;
-  }
-
-  if (packageName === '@fluentui/react') {
-    createFluentReactFixtures();
-    createEntry('@fluentui/keyboard-key');
-
-    const entries = buildEntries('@fluentui/react');
-    entries['keyboard-key'] = buildEntry('@fluentui/keyboard-key');
-    return entries;
-  }
-
-  console.error('🚨 packageName needs to be one of `@fluentui/react` or `@fluentui/react-northstar`!');
-  process.exit(1);
-}
-
-const packageName = process.env.PACKAGE ?? '';
-
-if (!packageName) {
-  console.error('🚨 No packageName provided! Set it via env variable name "PACKAGE"');
-  process.exit(1);
-}
-const entries = getEntries(packageName);
-const config = createWebpackConfig(entries, packageName);
-
-module.exports = config;
diff --git a/apps/test-bundles/webpackUtils.js b/apps/test-bundles/webpackUtils.js
deleted file mode 100644
index c76868a36092e9..00000000000000
--- a/apps/test-bundles/webpackUtils.js
+++ /dev/null
@@ -1,214 +0,0 @@
-// @ts-check
-const path = require('path');
-const fs = require('fs-extra');
-const { resources } = require('@fluentui/scripts-webpack');
-const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
-const TerserPlugin = require('terser-webpack-plugin');
-
-const FIXTURE_PATH = 'temp/fixtures/';
-
-/**
- *
- * @param {{[entryName:string]:{entryPath:string, includeStats:boolean}}} entries
- * @param {string} packageName
- * @returns
- */
-function createWebpackConfig(entries, packageName) {
-  const normalizedPkgName = packageName.replace('@fluentui/', '');
-  return Object.keys(entries).map(entryName => {
-    /** @type {BundleAnalyzerPlugin.Options} */
-    let anaylizerPluginOptions = {
-      analyzerMode: 'static',
-      reportFilename: entryName + '.stats.html',
-      openAnalyzer: false,
-      generateStatsFile: false,
-      logLevel: 'warn',
-    };
-
-    const { entryPath, includeStats } = entries[entryName];
-
-    if (includeStats) {
-      anaylizerPluginOptions = {
-        ...anaylizerPluginOptions,
-        generateStatsFile: true,
-        statsOptions: {
-          // https://webpack.js.org/configuration/stats
-          assets: true,
-          modules: true,
-
-          builtAt: false,
-          .../** @type {*} */ ({ outputPath: false }),
-          namedChunkGroups: false,
-          logging: false,
-          children: false,
-          source: false,
-          reasons: false,
-          chunks: false,
-          cached: false,
-          cachedAssets: false,
-          performance: false,
-          timings: false,
-        },
-        statsFilename: entryName + '.stats.json',
-      };
-    }
-
-    const config = resources.createConfig(
-      entryName,
-      true,
-      {
-        entry: {
-          [entryName]: entryPath,
-        },
-        output: {
-          filename: `[name].min.js`,
-          path: path.resolve(__dirname, 'dist', normalizedPkgName),
-        },
-        externals: {
-          react: 'React',
-          'react-dom': 'ReactDOM',
-        },
-        optimization: {
-          minimize: true,
-          minimizer: [
-            new TerserPlugin({
-              extractComments: false,
-            }),
-          ],
-        },
-        plugins: [new BundleAnalyzerPlugin(anaylizerPluginOptions)],
-      },
-      true,
-      true,
-    )[0];
-    if (packageName === '@fluentui/react-northstar') {
-      // This is used most of the configs for IE 11 compat, which northstar doesn't need
-      delete config.target;
-    }
-    return config;
-  });
-}
-
-/**
- * Webpack will remove any unused import as a dead code (tree shaking).
- * Thus we are creating temporary JS files with top-level component imports
- * and console logging them. This will ensure that the code is active
- * and that webpack bundles it correctly.
- */
-function createFluentNorthstarFixtures() {
-  const packageName = '@fluentui/react-northstar';
-  const distPath = path.dirname(require.resolve(packageName).replace('commonjs', 'es'));
-  const packagePath = path.resolve(distPath, 'components');
-  fs.readdirSync(packagePath).forEach(itemName => {
-    const isFolder = fs.statSync(path.join(packagePath, itemName)).isDirectory();
-
-    if (isFolder && itemName) {
-      const importStatement = `import { ${itemName} } from '${packageName}'; console.log(${itemName})`;
-      try {
-        const folderName = getFolderName(packageName);
-        const entryPath = path.join(FIXTURE_PATH, folderName, `${itemName}.js`);
-        fs.outputFileSync(entryPath, importStatement, 'utf-8');
-      } catch (err) {
-        console.log(err);
-      }
-    }
-  });
-}
-
-// Files which should not be considered top-level entries.
-const TopLevelEntryFileExclusions = ['index.js', 'version.js', 'index.bundle.js'];
-
-function createFluentReactFixtures() {
-  const packageName = '@fluentui/react';
-  const distPath = path.dirname(require.resolve(packageName).replace('lib-commonjs', 'lib'));
-  const packagePath = path.resolve(distPath);
-  fs.readdirSync(packagePath).forEach(itemName => {
-    const isFolder = fs.statSync(path.join(packagePath, itemName)).isDirectory();
-    const isAllowedFile = itemName && itemName.match(/.js$/) && !TopLevelEntryFileExclusions.includes(itemName);
-
-    if (isAllowedFile && !isFolder) {
-      const item = isFolder ? itemName : itemName.replace(/.js$/, '');
-      // import everything from package/item path
-      const importStatement = `import * as p from '${packageName}/lib/${item}'; console.log(p)`;
-      try {
-        const folderName = getFolderName(packageName);
-        const entryPath = path.join(FIXTURE_PATH, folderName, `${item}.js`);
-        fs.outputFileSync(entryPath, importStatement, 'utf-8');
-      } catch (err) {
-        console.log(err);
-      }
-    }
-  });
-}
-
-/**
- * @param {string} packageName
- */
-function createEntry(packageName) {
-  try {
-    // import everything from a single package
-    const importStatement = `import * as p from '${packageName}'; console.log(p)`;
-    const folderName = getFolderName(packageName);
-    const entryPath = path.join(FIXTURE_PATH, folderName, 'index.js');
-    fs.outputFileSync(entryPath, importStatement, 'utf-8');
-  } catch (err) {
-    console.log(err);
-  }
-}
-
-/**
- * Build webpack entries from created fixtures.
- *
- * @param {string} packageName
- * @param {{[entryName:string]:{entryPath:string, includeStats:boolean}}} [entries]
- * @param {boolean} [includeStats] - Stats are generated and used by the size auditor report
-to check more details on what caused the bundle size change. Due to stats generation being slow,
-and therefore slowing down CI significantly, setting this to true to avoid stats generation.
-If bundle size is changed unexpectedly, developers can drill down deeper on the problem by
-locally running bundle tests.
- */
-function buildEntries(packageName, entries = {}, includeStats = true) {
-  const folderName = getFolderName(packageName);
-  const packagePath = path.join(FIXTURE_PATH, folderName);
-
-  fs.readdirSync(packagePath).forEach(itemName => {
-    const entryName = itemName.replace(/.js$/, '');
-    const entryPath = path.resolve(path.join(packagePath, itemName));
-    entries[`${packageName.replace('@', '').replace('/', '-')}-${entryName}`] = {
-      entryPath,
-      includeStats,
-    };
-  });
-
-  return entries;
-}
-
-/**
- * Build entries for single fixture with top level import.
- * @param {string} packageName
- * @param {boolean} [includeStats]
- */
-function buildEntry(packageName, includeStats = true) {
-  const folderName = getFolderName(packageName);
-  const entryPath = path.resolve(path.join(FIXTURE_PATH, folderName));
-  return {
-    entryPath: `${entryPath}/index.js`,
-    includeStats,
-  };
-}
-
-/**
- * @param {string} packageName
- */
-function getFolderName(packageName) {
-  return packageName.replace('@fluentui/', '');
-}
-
-module.exports = {
-  buildEntries,
-  buildEntry,
-  createFluentNorthstarFixtures,
-  createFluentReactFixtures,
-  createEntry,
-  createWebpackConfig,
-};
diff --git a/azure-pipelines.bundlesize.yml b/azure-pipelines.bundlesize.yml
index bd3a39f59bd167..45bc4ecc29a675 100644
--- a/azure-pipelines.bundlesize.yml
+++ b/azure-pipelines.bundlesize.yml
@@ -66,31 +66,22 @@ jobs:
           filePath: yarn-ci.sh
         displayName: yarn
 
-      - script: yarn build --to @fluentui/react @fluentui/keyboard-key @fluentui/react-northstar
-        displayName: build @fluentui/react, @fluentui/react-northstar
-
-      - script: yarn workspace @fluentui/test-bundles bundle-size-auditor
-        displayName: create @fluentui/react bundle-size entries
-        env:
-          PACKAGE: '@fluentui/react'
-
-      - script: yarn workspace @fluentui/test-bundles bundle-size-auditor
-        displayName: create @fluentui/react-northstar bundle-size entries
-        env:
-          PACKAGE: '@fluentui/react-northstar'
+      - script: yarn lage bundle-size-auditor --verbose $(sinceArg)
+        displayName: build packages & create reports
 
-      - script: yarn workspace @fluentui/test-bundles just-scripts bundle-size-merge
-        displayName: 'Merge @fluentui/react, @fluentui/react-northstar to bundlesizes.json'
+      - script: yarn bundle-size-auditor --create-report --report-path dist/bundle-size-auditor
+        displayName: 'Merge generated bundlesize.json into bundlesizes.json'
 
       - task: PublishBuildArtifacts@1
-        displayName: 'Publish Merged Bundle Size information'
+        displayName: 'Publish Merged Bundle Size information for lightrail processing'
         inputs:
-          PathtoPublish: 'apps/test-bundles/dist/bundlesizes.json'
+          PathtoPublish: 'dist/bundle-size-auditor/bundlesizes.json'
+          ArtifactName: drop
 
       - task: PublishBuildArtifacts@1
-        displayName: 'Publish Artifact dist folder upon build for debug'
+        displayName: 'Publish bundled artifacts for debug'
         inputs:
-          PathtoPublish: 'apps/test-bundles/dist'
+          PathtoPublish: 'dist/bundle-size-auditor'
           ArtifactName: distdrop
 
       - template: .devops/templates/cleanup.yml
diff --git a/change/@fluentui-react-7c0452ba-90de-488a-b196-6fa727c27fcc.json b/change/@fluentui-react-7c0452ba-90de-488a-b196-6fa727c27fcc.json
new file mode 100644
index 00000000000000..c6f22327e779fb
--- /dev/null
+++ b/change/@fluentui-react-7c0452ba-90de-488a-b196-6fa727c27fcc.json
@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "chore: add bundle-size-auditor task which replaces global test-bundles application approach",
+  "packageName": "@fluentui/react",
+  "email": "martinhochel@microsoft.com",
+  "dependentChangeType": "none"
+}
diff --git a/lage.config.js b/lage.config.js
index 0459542313df59..69d29cc91919d1 100644
--- a/lage.config.js
+++ b/lage.config.js
@@ -5,6 +5,7 @@ module.exports = {
     'build:info': [],
     bundle: ['build'],
     'bundle-size': ['build'],
+    'bundle-size-auditor': ['build'],
     // adding temporary back until import plugin rule is resolved https://github.com/microsoft/fluentui/issues/27727
     lint: ['build'],
     clean: [],
diff --git a/packages/fluentui/react-northstar/bundle-size-auditor.config.js b/packages/fluentui/react-northstar/bundle-size-auditor.config.js
new file mode 100644
index 00000000000000..d0f0221fa65b30
--- /dev/null
+++ b/packages/fluentui/react-northstar/bundle-size-auditor.config.js
@@ -0,0 +1,32 @@
+// @ts-check
+const path = require('path');
+const fs = require('fs');
+
+module.exports = /** @type {import('@fluentui/scripts-bundle-size-auditor').Config} */ ({
+  createFixtures: config => {
+    const packageName = '@fluentui/react-northstar';
+    const distPath = path.dirname(require.resolve(packageName).replace('commonjs', 'es'));
+    const packagePath = path.resolve(distPath, 'components');
+    const fixturesEntries = fs.readdirSync(packagePath).map(itemName => {
+      const isFolder = fs.statSync(path.join(packagePath, itemName)).isDirectory();
+
+      if (isFolder && itemName) {
+        const importStatement = `import { ${itemName} } from '${packageName}'; console.log(${itemName})`;
+        try {
+          const folderName = packageName.replace('@fluentui/', '');
+          const entryPath = path.join(folderName, `${itemName}.js`);
+          config.writeFixture(entryPath, importStatement);
+
+          return entryPath;
+        } catch (err) {
+          // eslint-disable-next-line no-console
+          console.error(err);
+        }
+      }
+
+      return;
+    });
+
+    return fixturesEntries.filter(Boolean);
+  },
+});
diff --git a/packages/fluentui/react-northstar/package.json b/packages/fluentui/react-northstar/package.json
index c1a31c035be992..31c27d3ec40736 100644
--- a/packages/fluentui/react-northstar/package.json
+++ b/packages/fluentui/react-northstar/package.json
@@ -67,6 +67,7 @@
   "scripts": {
     "build": "gulp bundle:package:no-umd && yarn build:info",
     "build:info": "gulp build:component-info",
+    "bundle-size-auditor": "bundle-size-auditor --report-path='../../../dist/bundle-size-auditor/react-northstar'",
     "clean": "gulp clean:component-info bundle:package:clean",
     "lint": "eslint --ext .js,.ts,.tsx .",
     "lint:fix": "yarn lint --fix",
diff --git a/packages/react/bundle-size-auditor.config.js b/packages/react/bundle-size-auditor.config.js
new file mode 100644
index 00000000000000..e1ce726900d425
--- /dev/null
+++ b/packages/react/bundle-size-auditor.config.js
@@ -0,0 +1,39 @@
+// @ts-check
+const path = require('path');
+const fs = require('fs');
+
+module.exports = /** @type {import('@fluentui/scripts-bundle-size-auditor').Config} */ ({
+  extraEntries: ['@fluentui/keyboard-key'],
+  createFixtures: config => {
+    // Files which should not be considered top-level entries.
+    const TopLevelEntryFileExclusions = ['index.js', 'version.js', 'index.bundle.js'];
+
+    const packageName = '@fluentui/react';
+    const distPath = path.dirname(require.resolve(packageName).replace('lib-commonjs', 'lib'));
+    const packagePath = path.resolve(distPath);
+
+    const fixturesEntries = fs.readdirSync(packagePath).map(itemName => {
+      const isFolder = fs.statSync(path.join(packagePath, itemName)).isDirectory();
+      const isAllowedFile = itemName && itemName.match(/.js$/) && !TopLevelEntryFileExclusions.includes(itemName);
+
+      if (isAllowedFile && !isFolder) {
+        const item = isFolder ? itemName : itemName.replace(/.js$/, '');
+        // import everything from package/item path
+        const importStatement = `import * as p from '${packageName}/lib/${item}'; console.log(p)`;
+        try {
+          const folderName = packageName.replace('@fluentui/', '');
+          const entryPath = path.join(folderName, `${item}.js`);
+          config.writeFixture(entryPath, importStatement);
+
+          return entryPath;
+        } catch (err) {
+          console.log(err);
+        }
+      }
+
+      return;
+    });
+
+    return fixturesEntries.filter(Boolean);
+  },
+});
diff --git a/packages/react/package.json b/packages/react/package.json
index 2b192209661925..50e9bd73a5f8c1 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -17,6 +17,7 @@
   "scripts": {
     "build": "just-scripts build",
     "bundle": "just-scripts bundle",
+    "bundle-size-auditor": "bundle-size-auditor --report-path='../../dist/bundle-size-auditor/react'",
     "build-storybook": "cross-env NODE_OPTIONS=--max-old-space-size=3072 just-scripts storybook:build",
     "clean": "just-scripts clean",
     "code-style": "just-scripts code-style",
diff --git a/scripts/bundle-size-auditor/README.md b/scripts/bundle-size-auditor/README.md
new file mode 100644
index 00000000000000..4c78261882375f
--- /dev/null
+++ b/scripts/bundle-size-auditor/README.md
@@ -0,0 +1,71 @@
+# bundle-size-auditor
+
+A CLI utility for getting bundle size information from your package.
+
+> NOTE: this is a legacy tool which was created to replace global "apps/test-bundles" functionality.
+> ATM it is used only for `fluentui/react` and `fluentui/react-northstar`
+> In future this will be removed and replaced by more robust `bundle-size` CLI tool(monosize).
+
+## CLI
+
+`yarn bundle-size-auditor --help`
+
+## Configuration
+
+Add task to your package.json
+
+```json
+{
+  "name": "@proj/one",
+  "scripts": {
+    "bundle-size-auditor": "bundle-size-auditor --report-path='../dist/bundle-size-auditor/one'"
+  }
+}
+```
+
+### Options
+
+#### `--report-path`
+
+While fixtures and bundles will be created locally within your package `./temp/fixtures/`,
+this path should point to same folder for all packages using this tool within monorepo, as we will process that path for CI.
+
+#### `--create-report`
+
+> mostly used on CI
+
+if used `--report-path` is mandatory. this will generate a merged `bundlesizes.json` metadata from all provided bundle within report-path folder.
+
+## How it works
+
+1. creates fixtures for your modules within a package
+2. bundles those fixtures via webpack in production mode with `webpack-bundle-analyzer` included to generate needed stats.
+3. generates `bundlesize.json` which contains bundle size per module within a package
+4. (CI) a `bundlesizes.json` is generated (via `yarn bundle-size-auditor --create-report --report-path dist/bundle-size-auditor`), which contains merged `bundlesize.json` files from all projects within monorepo that use `bundle-size-auditor`
+5. (CI) `bundlesizes.json` needs to be uploaded as an artifact on your CI from where it will be processed by some auditing service (we use `lightrail`)
+
+### lightrail
+
+To get meaningful auditing capabilities on CI, generated output needs to be uploaded to some BLOB storage on CI which is processed by `lightrail service` (which has "sizeauditor" capabilities build-in).
+
+Ligtrail service is configured within monorepo root [sizeauditor.json](./sizeauditor.json)
+
+```json
+{
+  "devopsDropFolderName": "drop",
+  "devopsAssemblyArtifactName": "drop"
+}
+```
+
+Those `drop` values need to be the same as artifact name being uploaded on CI
+
+[pipeline config](../../azure-pipelines.bundlesize.yml)
+
+```yml
+- task: PublishBuildArtifacts@1
+        displayName: 'Publish Merged Bundle Size information for lightrail processing'
+        inputs:
+          PathtoPublish: 'dist/bundle-size-auditor/bundlesizes.json'
+          # This one needs to be identical to "devopsDropFolderName" and "devopsAssemblyArtifactName" within sizeauditor.json
+          ArtifactName: drop
+```
diff --git a/scripts/bundle-size-auditor/__fixtures__/proj-one/bundle-size-auditor.config.js b/scripts/bundle-size-auditor/__fixtures__/proj-one/bundle-size-auditor.config.js
new file mode 100644
index 00000000000000..991359900950e5
--- /dev/null
+++ b/scripts/bundle-size-auditor/__fixtures__/proj-one/bundle-size-auditor.config.js
@@ -0,0 +1,9 @@
+module.exports = {
+  createFixtures: config => {
+    const entryPath = 'proj-one/hello.js';
+    const importStatement = "import * as p from '../../../lib-dist/hello'; console.log(p)";
+    config.writeFixture(entryPath, importStatement);
+    const fixturesEntries = [entryPath];
+    return fixturesEntries;
+  },
+};
diff --git a/scripts/bundle-size-auditor/__fixtures__/proj-one/lib-dist/hello.js b/scripts/bundle-size-auditor/__fixtures__/proj-one/lib-dist/hello.js
new file mode 100644
index 00000000000000..a79f544fa9f9bd
--- /dev/null
+++ b/scripts/bundle-size-auditor/__fixtures__/proj-one/lib-dist/hello.js
@@ -0,0 +1,3 @@
+export function greet(who, greeting = 'hello') {
+  return greeting + who + '!!!';
+}
diff --git a/scripts/bundle-size-auditor/__fixtures__/proj-one/lib-dist/index.js b/scripts/bundle-size-auditor/__fixtures__/proj-one/lib-dist/index.js
new file mode 100644
index 00000000000000..e4a7cd6b541e10
--- /dev/null
+++ b/scripts/bundle-size-auditor/__fixtures__/proj-one/lib-dist/index.js
@@ -0,0 +1 @@
+export { greet } from './hello';
diff --git a/scripts/bundle-size-auditor/__fixtures__/proj-one/package.json b/scripts/bundle-size-auditor/__fixtures__/proj-one/package.json
new file mode 100644
index 00000000000000..3d60463115c83f
--- /dev/null
+++ b/scripts/bundle-size-auditor/__fixtures__/proj-one/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "@fluentui/proj-one",
+  "main": "lib-dist/index.js",
+  "private": true
+}
diff --git a/scripts/bundle-size-auditor/bin/bundle-size-auditor.js b/scripts/bundle-size-auditor/bin/bundle-size-auditor.js
new file mode 100755
index 00000000000000..4c0851d8be4f6e
--- /dev/null
+++ b/scripts/bundle-size-auditor/bin/bundle-size-auditor.js
@@ -0,0 +1,12 @@
+#!/usr/bin/env node
+
+const path = require('path');
+const { registerTsProject } = require('nx/src/utils/register');
+
+registerTsProject(path.join(__dirname, '..'), 'tsconfig.lib.json');
+
+const { cli } = require('../src/cli');
+cli().catch(err => {
+  console.error(err);
+  process.exit(1);
+});
diff --git a/scripts/bundle-size-auditor/jest.config.js b/scripts/bundle-size-auditor/jest.config.js
new file mode 100644
index 00000000000000..10369a59749c3e
--- /dev/null
+++ b/scripts/bundle-size-auditor/jest.config.js
@@ -0,0 +1,19 @@
+// @ts-check
+
+/**
+ * @type {import('@jest/types').Config.InitialOptions}
+ */
+module.exports = {
+  displayName: 'scripts-bundle-size-auditor',
+  preset: '../../jest.preset.js',
+  transform: {
+    '^.+\\.tsx?$': [
+      'ts-jest',
+      {
+        isolatedModules: true,
+      },
+    ],
+  },
+  coverageDirectory: './coverage',
+  testEnvironment: 'node',
+};
diff --git a/scripts/bundle-size-auditor/package.json b/scripts/bundle-size-auditor/package.json
new file mode 100644
index 00000000000000..eafc9f461d4cd4
--- /dev/null
+++ b/scripts/bundle-size-auditor/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "@fluentui/scripts-bundle-size-auditor",
+  "version": "0.0.1",
+  "private": true,
+  "main": "src/index.dev.js",
+  "bin": {
+    "bundle-size-auditor": "./bin/bundle-size-auditor.js"
+  },
+  "scripts": {
+    "format": "prettier -w --ignore-path ../../.prettierignore .",
+    "format:check": "yarn format -c",
+    "lint": "eslint --ext .ts,.js .",
+    "test": "jest --passWithNoTests",
+    "type-check": "tsc -b tsconfig.json"
+  },
+  "dependencies": {}
+}
diff --git a/scripts/bundle-size-auditor/src/bundle-size-collect.ts b/scripts/bundle-size-auditor/src/bundle-size-collect.ts
new file mode 100644
index 00000000000000..7718669aef197f
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/bundle-size-collect.ts
@@ -0,0 +1,93 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+import { run } from 'parallel-webpack';
+
+import {
+  buildEntries,
+  buildEntry,
+  createEntry,
+  createWebpackConfigTemplate,
+  FIXTURE_PATH,
+  FIXTURE_BUILD_PATH,
+  writeFileSync,
+  Entries,
+} from './utils';
+import type { Config } from './types';
+
+export async function copyBundles(rootDir: string, reportPath: string) {
+  const reportFullPath = path.isAbsolute(reportPath) ? reportPath : path.join(rootDir, reportPath);
+
+  return fs.cpSync(path.join(rootDir, FIXTURE_BUILD_PATH), reportFullPath, { recursive: true });
+}
+
+export function prepareEntries(
+  options: {
+    rootDir: string;
+    packageName: string;
+  } & Config,
+) {
+  const writeFixture = (entryName: string, content: string) => {
+    writeFileSync(path.join(rootDir, FIXTURE_PATH, entryName), content, 'utf-8');
+  };
+
+  const { rootDir, packageName, extraEntries = [], createFixtures } = options;
+
+  createFixtures({ writeFixture });
+
+  extraEntries.forEach(extraEntry => {
+    createEntry(rootDir, extraEntry);
+  });
+
+  const entries = buildEntries(rootDir, packageName);
+
+  extraEntries.forEach(extraEntry => {
+    const newEntry = buildEntry(rootDir, extraEntry);
+    Object.assign(entries, newEntry);
+  });
+
+  return entries;
+}
+
+export async function bundleEntries(options: { rootDir: string; packageName: string; entries: Entries }) {
+  const configPath = createWebpackConfigTemplate(options);
+
+  return await run(configPath, {});
+}
+
+/**
+ *
+ * collates bundle size information from minified files in package `temp/fixtures/build/` and writes to `temp/fixtures/build/bundlesizes.json`.
+ *
+ * It is uploaded as an artifact by the build definition in Azure Dev Ops and used to compare baseline and PR file size information which gets reported by Size Auditor
+ */
+export function bundleSizeCollect(config: { rootDir: string; packageName: string; filename: string }) {
+  const { rootDir, filename: outputFilename } = config;
+
+  const distRoot = path.join(rootDir, FIXTURE_BUILD_PATH);
+  const bundlesizeJsonPath = path.join(distRoot, outputFilename);
+
+  const sizes: Record<string, number> = {};
+
+  const items = fs.readdirSync(distRoot);
+  items.forEach(item => {
+    const file = path.join(distRoot, item);
+
+    const isMinifiedJavascriptFile = item.match(/.min.js$/);
+    if (isMinifiedJavascriptFile) {
+      sizes[getComponentName(item)] = getFilesizeInBytes(file);
+    }
+  });
+
+  console.log(`CREATE: ${bundlesizeJsonPath} `);
+
+  fs.writeFileSync(bundlesizeJsonPath, JSON.stringify({ sizes }));
+
+  function getFilesizeInBytes(fileName: string) {
+    return fs.statSync(fileName).size;
+  }
+
+  function getComponentName(fileName: string) {
+    return path.basename(fileName, '.min.js');
+  }
+}
diff --git a/scripts/bundle-size-auditor/src/cli.spec.ts b/scripts/bundle-size-auditor/src/cli.spec.ts
new file mode 100644
index 00000000000000..57d84ff9ee7837
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/cli.spec.ts
@@ -0,0 +1,81 @@
+import * as path from 'path';
+import * as fs from 'fs';
+
+import { stripIndents } from '@nrwl/devkit';
+
+import { bundleSizeAuditor } from './cli';
+
+describe(`bundleSizeAuditor`, () => {
+  // don't spam testing output with logs from webpack etc
+  const noop = () => {};
+  jest.spyOn(console, 'log').mockImplementation(noop);
+  jest.spyOn(console, 'warn').mockImplementation(noop);
+
+  function setup() {
+    const fixturesRoot = path.join(__dirname, '../__fixtures__');
+    const rootDir = path.join(__dirname, '../temp/test');
+    const projOneRoot = path.join(rootDir, 'proj-one');
+
+    fs.rmSync(rootDir, { recursive: true, force: true });
+    fs.cpSync(fixturesRoot, rootDir, { recursive: true });
+
+    return {
+      projOneRoot,
+      rootDir,
+    };
+  }
+
+  it(`should create fixtures, bundle them and collect size within bundlesize.json`, async () => {
+    const { projOneRoot, rootDir } = setup();
+    await bundleSizeAuditor({ rootDir: projOneRoot });
+
+    const webpackBundleConfig = fs.readFileSync(
+      path.join(projOneRoot, 'temp/fixtures/webpack.bundle-size-auditor.config.js'),
+      'utf-8',
+    );
+
+    const fixtureFile = fs.readFileSync(path.join(projOneRoot, 'temp/fixtures/proj-one/hello.js'), 'utf-8');
+    const bundleFile = fs.readFileSync(
+      path.join(projOneRoot, 'temp/fixtures/build/fluentui-proj-one-hello.min.js'),
+      'utf-8',
+    );
+    const bundlesizeJSON = JSON.parse(
+      fs.readFileSync(path.join(projOneRoot, 'temp/fixtures/build/bundlesize.json'), 'utf-8'),
+    );
+
+    expect(stripIndents`${webpackBundleConfig}`).toEqual(
+      stripIndents`
+     const { createWebpackConfig } = require('@fluentui/scripts-bundle-size-auditor');
+
+    module.exports = createWebpackConfig({
+      "entries": {
+        "fluentui-proj-one-hello": {
+          "entryPath": "${rootDir}/proj-one/temp/fixtures/proj-one/hello.js",
+          "includeStats": true
+        }
+      },
+      "packageName": "@fluentui/proj-one",
+      "bundleRootPath": "${rootDir}/proj-one/temp/fixtures/build",
+      "transpileToEs5": true
+    });
+    `,
+    );
+    expect(fixtureFile).toEqual(`import * as p from '../../../lib-dist/hello'; console.log(p)`);
+    expect(bundleFile).toEqual(
+      `!function(){\"use strict\";var e={d:function(o,t){for(var n in t)e.o(t,n)&&!e.o(o,n)&&Object.defineProperty(o,n,{enumerable:!0,get:t[n]})},o:function(e,o){return Object.prototype.hasOwnProperty.call(e,o)},r:function(e){\"undefined\"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:\"Module\"}),Object.defineProperty(e,\"__esModule\",{value:!0})}},o={};function t(e,o=\"hello\"){return o+e+\"!!!\"}e.r(o),e.d(o,{greet:function(){return t}}),console.log(o)}();`,
+    );
+    expect(bundlesizeJSON).toEqual({ sizes: { 'fluentui-proj-one-hello': 484 } });
+  });
+
+  it(`should create bundlesizes.json merge`, async () => {
+    const { projOneRoot, rootDir } = setup();
+    const distPathForBundlesizesJson = path.join(rootDir, 'dist_reports');
+
+    await bundleSizeAuditor({ rootDir: projOneRoot, reportPath: path.join(distPathForBundlesizesJson, 'proj-one') });
+    await bundleSizeAuditor({ rootDir: projOneRoot, createReport: true, reportPath: distPathForBundlesizesJson });
+
+    expect(JSON.parse(fs.readFileSync(path.join(distPathForBundlesizesJson, 'bundlesizes.json'), 'utf-8'))).toEqual({
+      sizes: { 'fluentui-proj-one-hello': 484 },
+    });
+  });
+});
diff --git a/scripts/bundle-size-auditor/src/cli.ts b/scripts/bundle-size-auditor/src/cli.ts
new file mode 100644
index 00000000000000..4199a89e5a9e35
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/cli.ts
@@ -0,0 +1,64 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import * as yargs from 'yargs';
+import { bundleEntries, prepareEntries, bundleSizeCollect, copyBundles } from './bundle-size-collect';
+import { mergeBundleSizes } from './merge-bundlesizes';
+import { Config } from './types';
+import { CONFIG_NAME } from './utils';
+
+export async function cli(rootDir = process.cwd()) {
+  const args = processArgs();
+
+  await bundleSizeAuditor({ ...args, rootDir });
+}
+
+export async function bundleSizeAuditor(options: { rootDir: string } & Arguments) {
+  const { createReport, reportPath, rootDir } = options;
+
+  if (createReport) {
+    mergeBundleSizes(reportPath as string, 'bundlesizes.json');
+    return;
+  }
+
+  const configPath = path.join(rootDir, CONFIG_NAME);
+  const pkgJSon = JSON.parse(fs.readFileSync(path.join(rootDir, 'package.json'), 'utf-8'));
+  const packageName = pkgJSon.name;
+
+  const config: Config = await import(configPath).then(value => value.default);
+
+  const entries = prepareEntries({ rootDir, packageName, ...config });
+  await bundleEntries({ rootDir, packageName, entries });
+  bundleSizeCollect({ rootDir, packageName, filename: 'bundlesize.json' });
+
+  if (reportPath) {
+    copyBundles(rootDir, reportPath);
+  }
+}
+
+type Arguments = {
+  createReport?: boolean;
+  reportPath?: string;
+};
+function processArgs(): Arguments {
+  const args = yargs
+    .scriptName('bundle-size-auditor')
+    .usage('$0', 'creates fixtures, bundles them and provides stats output via webpack')
+    .option('createReport', {
+      type: 'boolean',
+      description:
+        'generate `bundlesizes.json` metadata from all provided bundles within report-path folder. Useful for CI scenarios.',
+    })
+    .option('reportPath', {
+      type: 'string',
+      description:
+        'path where project bundles output including bundlesize.json should be copied. This is useful for CI scenario which includes creating report via --create-report',
+    })
+    .version(false)
+    .help().argv;
+
+  if (args.createReport && !args.reportPath) {
+    throw new Error('--report-path is mandatory when --create-report is used');
+  }
+
+  return args;
+}
diff --git a/scripts/bundle-size-auditor/src/index.dev.js b/scripts/bundle-size-auditor/src/index.dev.js
new file mode 100644
index 00000000000000..03ac7a5f2b2bab
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/index.dev.js
@@ -0,0 +1,10 @@
+const path = require('path');
+const { registerTsProject } = require('nx/src/utils/register');
+
+registerTsProject(path.join(__dirname, '..'), 'tsconfig.lib.json');
+
+/**
+ * @typedef {import('./index').Config} Config
+ */
+
+module.exports = require('./index');
diff --git a/scripts/bundle-size-auditor/src/index.ts b/scripts/bundle-size-auditor/src/index.ts
new file mode 100644
index 00000000000000..2cceca56b8d7fd
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/index.ts
@@ -0,0 +1,4 @@
+/** public API */
+
+export { createWebpackConfig } from './utils';
+export type { Config } from './types';
diff --git a/scripts/bundle-size-auditor/src/merge-bundlesizes.ts b/scripts/bundle-size-auditor/src/merge-bundlesizes.ts
new file mode 100644
index 00000000000000..b8250e4aecc1f4
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/merge-bundlesizes.ts
@@ -0,0 +1,34 @@
+import * as path from 'path';
+import * as fs from 'fs';
+
+type Report = { sizes: { [entryName: string]: number } };
+
+export function mergeBundleSizes(reportPath: string, mergeFileName: string) {
+  const mergeFilePath = path.join(reportPath, mergeFileName);
+  const result: Report = {
+    sizes: {},
+  };
+
+  if (!fs.existsSync(reportPath)) {
+    fs.mkdirSync(reportPath, { recursive: true });
+    fs.writeFileSync(mergeFilePath, JSON.stringify(result), 'utf-8');
+    console.log(`INFO: no bundle-size-auditor reports present!`);
+    console.log(`CREATE: ${mergeFilePath}`);
+    return;
+  }
+
+  const projects = fs.readdirSync(reportPath).filter(value => {
+    return fs.statSync(path.join(reportPath, value)).isDirectory();
+  });
+
+  projects.forEach(projectName => {
+    const bundleSizeJson = path.join(reportPath, projectName, 'bundlesize.json');
+    if (fs.existsSync(bundleSizeJson)) {
+      const json: Report = JSON.parse(fs.readFileSync(bundleSizeJson, 'utf-8'));
+      Object.assign(result.sizes, json.sizes);
+    }
+  });
+
+  console.log(`CREATE: ${mergeFilePath}`);
+  fs.writeFileSync(mergeFilePath, JSON.stringify(result));
+}
diff --git a/scripts/bundle-size-auditor/src/types.ts b/scripts/bundle-size-auditor/src/types.ts
new file mode 100644
index 00000000000000..4e702e23ea4108
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/types.ts
@@ -0,0 +1,10 @@
+export interface Config {
+  extraEntries?: string[];
+  /**
+   * Webpack will remove any unused import as a dead code (tree shaking).
+   * Thus we are creating temporary JS files with top-level component imports
+   * and console logging them. This will ensure that the code is active
+   * and that webpack bundles it correctly.
+   */
+  createFixtures: (options: { writeFixture: (entryName: string, content: string) => void }) => string[];
+}
diff --git a/scripts/bundle-size-auditor/src/typings.d.ts b/scripts/bundle-size-auditor/src/typings.d.ts
new file mode 100644
index 00000000000000..fa8260c93365fa
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/typings.d.ts
@@ -0,0 +1,3 @@
+declare module 'parallel-webpack' {
+  export async function run(configPath: string, options: {}, doneCallback?: () => void): void;
+}
diff --git a/scripts/bundle-size-auditor/src/utils.ts b/scripts/bundle-size-auditor/src/utils.ts
new file mode 100644
index 00000000000000..f1dfb424eb02e9
--- /dev/null
+++ b/scripts/bundle-size-auditor/src/utils.ts
@@ -0,0 +1,203 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import { BundleAnalyzerPlugin } from 'webpack-bundle-analyzer';
+import TerserPlugin from 'terser-webpack-plugin';
+import webpack from 'webpack';
+
+type Entry = { entryPath: string; includeStats: boolean };
+export type Entries = { [entryName: string]: Entry };
+
+export const FIXTURE_PATH = 'temp/fixtures';
+export const FIXTURE_BUILD_PATH = path.join(FIXTURE_PATH, 'build');
+export const CONFIG_NAME = 'bundle-size-auditor.config.js';
+
+export function createWebpackConfigTemplate(options: { rootDir: string; entries: Entries; packageName: string }) {
+  const { entries, packageName, rootDir } = options;
+  const projectRootDir = path.posix.join(rootDir, FIXTURE_PATH);
+  const bundleRootPath = path.posix.join(rootDir, FIXTURE_BUILD_PATH);
+
+  const webpackConfig: Parameters<typeof createWebpackConfig>[0] = {
+    entries: entries,
+    packageName: packageName,
+    bundleRootPath: bundleRootPath,
+    transpileToEs5: packageName !== '@fluentui/react-northstar',
+  };
+  const template = `
+    const { createWebpackConfig } = require('@fluentui/scripts-bundle-size-auditor');
+
+    module.exports = createWebpackConfig(${JSON.stringify(webpackConfig, null, 2)});
+ `;
+
+  const webpackConfigPath = path.join(projectRootDir, 'webpack.bundle-size-auditor.config.js');
+
+  fs.writeFileSync(webpackConfigPath, template, 'utf-8');
+
+  return webpackConfigPath;
+}
+
+export function createWebpackConfig(options: {
+  entries: Entries;
+  packageName: string;
+  bundleRootPath: string;
+  transpileToEs5: boolean;
+}) {
+  const { bundleRootPath, entries, transpileToEs5 } = options;
+
+  const cssRule = {
+    test: /\.css$/,
+    include: /node_modules/,
+    use: ['style-loader', 'css-loader'],
+  };
+
+  /**
+   * As of webpack 5, you have to add the `es5` target for IE 11 compatibility.
+   * Otherwise it will output lambdas for smaller bundle size.
+   * @see https://webpack.js.org/migrate/5/#need-to-support-an-older-browser-like-ie-11
+   *
+   * NOTE: IE 11 compat is still needed? for fluentui/react (v8) ?
+   */
+  const target = ['web', transpileToEs5 ? 'es5' : null].filter(Boolean) as string[];
+
+  return Object.entries(entries).map(([entryName, entryDefinition]) => {
+    const { entryPath, includeStats } = entryDefinition;
+
+    const anaylizerPluginOptions: BundleAnalyzerPlugin.Options = {
+      analyzerMode: 'static',
+      reportFilename: entryName + '.stats.html',
+      openAnalyzer: false,
+      generateStatsFile: false,
+      logLevel: 'warn',
+      ...(includeStats
+        ? {
+            generateStatsFile: true,
+            statsFilename: entryName + '.stats.json',
+            /**
+             * https://webpack.js.org/configuration/stats
+             */
+            statsOptions: {
+              assets: true,
+              modules: true,
+
+              builtAt: false,
+              outputPath: false,
+              chunkModules: false,
+              // namedChunkGroups: false,
+              chunkGroups: false,
+              logging: false,
+              children: false,
+              source: false,
+              reasons: false,
+              chunks: false,
+              cached: false,
+              cachedAssets: false,
+              performance: false,
+              timings: false,
+            },
+          }
+        : null),
+    };
+
+    const config: webpack.Configuration = {
+      mode: 'production',
+      entry: {
+        [entryName]: entryPath,
+      },
+      output: {
+        filename: `[name].min.js`,
+        path: bundleRootPath,
+      },
+      externals: {
+        react: 'React',
+        'react-dom': 'ReactDOM',
+      },
+      module: {
+        /* TODO: this should be no longer needed ? - https://github.com/webpack/webpack/issues/1721 */
+        noParse: [/autoit.js/],
+        rules: [cssRule],
+      },
+      target,
+      devtool: undefined,
+      optimization: {
+        minimize: true,
+        minimizer: [
+          new TerserPlugin({
+            extractComments: false,
+          }),
+        ],
+      },
+      plugins: [
+        // This is needed because Webpack 5 no longer automatically resolves process.env values.
+        new webpack.DefinePlugin({
+          'process.env.NODE_ENV': JSON.stringify('production'),
+        }),
+        new BundleAnalyzerPlugin(anaylizerPluginOptions),
+      ],
+    };
+
+    return config;
+  });
+}
+
+export function createEntry(cwd: string, packageName: string) {
+  try {
+    // import everything from a single package
+    const importStatement = `import * as p from '${packageName}'; console.log(p)`;
+    const folderName = getFolderName(packageName);
+    const entryPath = path.join(cwd, FIXTURE_PATH, folderName, 'index.js');
+    writeFileSync(entryPath, importStatement, 'utf-8');
+
+    return entryPath;
+  } catch (err) {
+    console.log(err);
+  }
+}
+
+/**
+ * Build webpack entries from created fixtures.
+ *
+ * @param includeStats - Stats are generated and used by the size auditor report
+to check more details on what caused the bundle size change. Due to stats generation being slow,
+and therefore slowing down CI significantly, setting this to true to avoid stats generation.
+If bundle size is changed unexpectedly, developers can drill down deeper on the problem by
+locally running bundle tests.
+ */
+export function buildEntries(cwd: string, packageName: string, entries: Entries = {}, includeStats = true) {
+  const folderName = getFolderName(packageName);
+  const packagePath = path.join(cwd, FIXTURE_PATH, folderName);
+
+  fs.readdirSync(packagePath).forEach(itemName => {
+    const entryName = itemName.replace(/.js$/, '');
+    const entryPath = path.resolve(path.join(packagePath, itemName));
+    entries[`${packageName.replace('@', '').replace('/', '-')}-${entryName}`] = {
+      entryPath,
+      includeStats,
+    };
+  });
+
+  return entries;
+}
+
+/**
+ * Build entries for single fixture with top level import.
+ */
+export function buildEntry(cwd: string, packageName: string, includeStats = true) {
+  const folderName = getFolderName(packageName);
+  const entryPath = path.join(cwd, FIXTURE_PATH, folderName);
+  const entryKey = `${packageName.replace('@fluentui/', '').replace('/', '-')}`;
+
+  return {
+    [entryKey]: {
+      entryPath: `${entryPath}/index.js`,
+      includeStats,
+    },
+  };
+}
+
+function getFolderName(packageName: string) {
+  return packageName.replace('@fluentui/', '');
+}
+
+export function writeFileSync(filePath: string, contents: string, encoding: BufferEncoding) {
+  fs.mkdirSync(path.dirname(filePath), { recursive: true });
+  fs.writeFileSync(filePath, contents, encoding);
+}
diff --git a/scripts/bundle-size-auditor/tsconfig.json b/scripts/bundle-size-auditor/tsconfig.json
new file mode 100644
index 00000000000000..b289e657bc0e53
--- /dev/null
+++ b/scripts/bundle-size-auditor/tsconfig.json
@@ -0,0 +1,22 @@
+{
+  "extends": "@tsconfig/node14/tsconfig.json",
+  "compilerOptions": {
+    "target": "ES2019",
+    "pretty": true,
+    "noEmit": true,
+    "allowJs": true,
+    "checkJs": true,
+    "sourceMap": true,
+    "noUnusedLocals": true
+  },
+  "include": [],
+  "files": [],
+  "references": [
+    {
+      "path": "./tsconfig.lib.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}
diff --git a/scripts/bundle-size-auditor/tsconfig.lib.json b/scripts/bundle-size-auditor/tsconfig.lib.json
new file mode 100644
index 00000000000000..6c0f8040f80349
--- /dev/null
+++ b/scripts/bundle-size-auditor/tsconfig.lib.json
@@ -0,0 +1,11 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "noEmit": false,
+    "lib": ["ES2019"],
+    "outDir": "../../dist/out-tsc",
+    "types": ["node"]
+  },
+  "exclude": ["**/*.spec.ts", "**/*.test.ts", "src/index.dev.js"],
+  "include": ["./src/**/*.ts", "./src/**/*.js"]
+}
diff --git a/scripts/bundle-size-auditor/tsconfig.spec.json b/scripts/bundle-size-auditor/tsconfig.spec.json
new file mode 100644
index 00000000000000..4d20fc98b71dd4
--- /dev/null
+++ b/scripts/bundle-size-auditor/tsconfig.spec.json
@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "CommonJS",
+    "outDir": "dist",
+    "types": ["jest", "node"]
+  },
+  "include": ["**/*.spec.ts", "**/*.test.ts", "**/*.d.ts"]
+}
diff --git a/scripts/generators/bundle-size-collect.js b/scripts/generators/bundle-size-collect.js
deleted file mode 100644
index d5f1944e257b44..00000000000000
--- a/scripts/generators/bundle-size-collect.js
+++ /dev/null
@@ -1,37 +0,0 @@
-/**
- * @see {@link ../../azure-pipelines.bundlesize.yml}
- */
-
-// This script collates bundle size information from minified files in apps/test-bundles/dist
-// and writes to apps/test-bundles/dist/bundlesizes.json.
-// It is uploaded as an artifact by the build definition in Azure DevOps and used to compare
-// baseline and PR file size information which gets reported by Size Auditor.
-
-const fs = require('fs');
-const path = require('path');
-
-const distRoot = path.resolve(__dirname, '../../apps/test-bundles/dist');
-/** @type {Record<string,number>} */
-const sizes = {};
-const outputFilename = 'bundlesize.json';
-
-// eslint-disable-next-line no-var
-var items = fs.readdirSync(distRoot);
-items.forEach(item => {
-  const file = path.join(distRoot, item);
-
-  const isMinifiedJavascriptFile = item.match(/.min.js$/);
-  if (isMinifiedJavascriptFile) {
-    sizes[getComponentName(item)] = getFilesizeInBytes(file);
-  }
-});
-
-fs.writeFileSync(path.join(distRoot, outputFilename), JSON.stringify({ sizes }));
-
-function getFilesizeInBytes(/** @type {string} */ fileName) {
-  return fs.statSync(fileName).size;
-}
-
-function getComponentName(/** @type {string} */ fileName) {
-  return path.basename(fileName, '.min.js');
-}
diff --git a/workspace.json b/workspace.json
index 8aa630b8799ea8..9e392f6465e17d 100644
--- a/workspace.json
+++ b/workspace.json
@@ -1055,6 +1055,12 @@
       "projectType": "library",
       "tags": ["tools"]
     },
+    "@fluentui/scripts-bundle-size-auditor": {
+      "root": "scripts/bundle-size-auditor",
+      "sourceRoot": "scripts/bundle-size-auditor/src",
+      "projectType": "library",
+      "tags": ["tools"]
+    },
     "@fluentui/set-version": {
       "root": "packages/set-version",
       "projectType": "library",
@@ -1097,11 +1103,6 @@
       "projectType": "library",
       "implicitDependencies": []
     },
-    "@fluentui/test-bundles": {
-      "root": "apps/test-bundles",
-      "projectType": "application",
-      "implicitDependencies": []
-    },
     "@fluentui/test-utilities": {
       "root": "packages/test-utilities",
       "projectType": "library",