diff --git a/package.json b/package.json
index ac59b6613..c18c4bd1a 100644
--- a/package.json
+++ b/package.json
@@ -1,17 +1,17 @@
 {
   "name": "@angular-devkit/build-angular",
-  "version": "21.0.0-next.2+sha-9749ec6",
+  "version": "20.3.4+sha-d8ca86b",
   "description": "Angular Webpack Build Facade",
   "main": "src/index.js",
   "typings": "src/index.d.ts",
   "builders": "builders.json",
   "dependencies": {
     "@ampproject/remapping": "2.3.0",
-    "@angular-devkit/architect": "github:angular/angular-devkit-architect-builds#9749ec6",
-    "@angular-devkit/build-webpack": "github:angular/angular-devkit-build-webpack-builds#9749ec6",
-    "@angular-devkit/core": "github:angular/angular-devkit-core-builds#9749ec6",
-    "@angular/build": "github:angular/angular-build-builds#9749ec6",
-    "@babel/core": "7.28.4",
+    "@angular-devkit/architect": "github:angular/angular-devkit-architect-builds#d8ca86b",
+    "@angular-devkit/build-webpack": "github:angular/angular-devkit-build-webpack-builds#d8ca86b",
+    "@angular-devkit/core": "github:angular/angular-devkit-core-builds#d8ca86b",
+    "@angular/build": "github:angular/angular-build-builds#d8ca86b",
+    "@babel/core": "7.28.3",
     "@babel/generator": "7.28.3",
     "@babel/helper-annotate-as-pure": "7.27.3",
     "@babel/helper-split-export-declaration": "7.24.7",
@@ -19,9 +19,9 @@
     "@babel/plugin-transform-async-to-generator": "7.27.1",
     "@babel/plugin-transform-runtime": "7.28.3",
     "@babel/preset-env": "7.28.3",
-    "@babel/runtime": "7.28.4",
+    "@babel/runtime": "7.28.3",
     "@discoveryjs/json-ext": "0.6.3",
-    "@ngtools/webpack": "github:angular/ngtools-webpack-builds#9749ec6",
+    "@ngtools/webpack": "github:angular/ngtools-webpack-builds#d8ca86b",
     "ansi-colors": "4.1.3",
     "autoprefixer": "10.4.21",
     "babel-loader": "10.0.0",
@@ -29,11 +29,12 @@
     "copy-webpack-plugin": "13.0.1",
     "css-loader": "7.1.2",
     "esbuild-wasm": "0.25.9",
+    "fast-glob": "3.3.3",
     "http-proxy-middleware": "3.0.5",
     "istanbul-lib-instrument": "6.0.3",
     "jsonc-parser": "3.3.1",
     "karma-source-map-support": "1.4.0",
-    "less": "4.4.1",
+    "less": "4.4.0",
     "less-loader": "12.3.0",
     "license-webpack-plugin": "4.0.2",
     "loader-utils": "3.3.1",
@@ -43,20 +44,19 @@
     "picomatch": "4.0.3",
     "piscina": "5.1.3",
     "postcss": "8.5.6",
-    "postcss-loader": "8.2.0",
+    "postcss-loader": "8.1.1",
     "resolve-url-loader": "5.0.0",
     "rxjs": "7.8.2",
-    "sass": "1.92.1",
+    "sass": "1.90.0",
     "sass-loader": "16.0.5",
     "semver": "7.7.2",
     "source-map-loader": "5.0.0",
     "source-map-support": "0.5.21",
-    "terser": "5.44.0",
-    "tinyglobby": "0.2.15",
+    "terser": "5.43.1",
     "tree-kill": "1.2.2",
     "tslib": "2.8.1",
-    "webpack": "5.101.3",
-    "webpack-dev-middleware": "7.4.3",
+    "webpack": "5.101.2",
+    "webpack-dev-middleware": "7.4.2",
     "webpack-dev-server": "5.2.2",
     "webpack-merge": "6.0.1",
     "webpack-subresource-integrity": "5.1.0"
@@ -65,22 +65,22 @@
     "esbuild": "0.25.9"
   },
   "peerDependencies": {
-    "@angular/core": "^21.0.0-next.0",
-    "@angular/compiler-cli": "^21.0.0-next.0",
-    "@angular/localize": "^21.0.0-next.0",
-    "@angular/platform-browser": "^21.0.0-next.0",
-    "@angular/platform-server": "^21.0.0-next.0",
-    "@angular/service-worker": "^21.0.0-next.0",
-    "@angular/ssr": "github:angular/angular-ssr-builds#9749ec6",
+    "@angular/core": "^20.0.0",
+    "@angular/compiler-cli": "^20.0.0",
+    "@angular/localize": "^20.0.0",
+    "@angular/platform-browser": "^20.0.0",
+    "@angular/platform-server": "^20.0.0",
+    "@angular/service-worker": "^20.0.0",
+    "@angular/ssr": "github:angular/angular-ssr-builds#d8ca86b",
     "@web/test-runner": "^0.20.0",
     "browser-sync": "^3.0.2",
     "jest": "^29.5.0",
     "jest-environment-jsdom": "^29.5.0",
     "karma": "^6.3.0",
-    "ng-packagr": "^21.0.0-next.0",
+    "ng-packagr": "^20.0.0",
     "protractor": "^7.0.0",
     "tailwindcss": "^2.0.0 || ^3.0.0 || ^4.0.0",
-    "typescript": ">=5.9 <6.0"
+    "typescript": ">=5.8 <6.0"
   },
   "peerDependenciesMeta": {
     "@angular/core": {
@@ -137,7 +137,7 @@
     "type": "git",
     "url": "https://github.com/angular/angular-cli.git"
   },
-  "packageManager": "pnpm@10.15.1",
+  "packageManager": "pnpm@10.18.0",
   "engines": {
     "node": "^20.19.0 || ^22.12.0 || >=24.0.0",
     "npm": "^6.11.0 || ^7.5.6 || >=8.0.0",
diff --git a/src/tools/babel/presets/application.d.ts b/src/tools/babel/presets/application.d.ts
index a0f2ceb88..d6ed49e5f 100644
--- a/src/tools/babel/presets/application.d.ts
+++ b/src/tools/babel/presets/application.d.ts
@@ -37,7 +37,7 @@ export interface ApplicationPresetOptions {
         inputSourceMap: unknown;
     };
     optimize?: {
-        pureTopLevel: boolean;
+        topLevelSafeMode: boolean;
         wrapDecorators: boolean;
     };
     supportedBrowsers?: string[];
diff --git a/src/tools/babel/presets/application.js b/src/tools/babel/presets/application.js
index 7ccc967a9..60639226b 100644
--- a/src/tools/babel/presets/application.js
+++ b/src/tools/babel/presets/application.js
@@ -124,13 +124,7 @@ function default_1(api, options) {
     }
     if (options.optimize) {
         const { adjustStaticMembers, adjustTypeScriptEnums, elideAngularMetadata, markTopLevelPure, } = require('@angular/build/private');
-        if (options.optimize.pureTopLevel) {
-            plugins.push(markTopLevelPure);
-        }
-        plugins.push(elideAngularMetadata, adjustTypeScriptEnums, [
-            adjustStaticMembers,
-            { wrapDecorators: options.optimize.wrapDecorators },
-        ]);
+        plugins.push([markTopLevelPure, { topLevelSafeMode: options.optimize.topLevelSafeMode }], elideAngularMetadata, adjustTypeScriptEnums, [adjustStaticMembers, { wrapDecorators: options.optimize.wrapDecorators }]);
     }
     if (options.instrumentCode) {
         plugins.push(require('../plugins/add-code-coverage').default);
diff --git a/src/tools/babel/webpack-loader.js b/src/tools/babel/webpack-loader.js
index 619bc7347..0dd256fbf 100644
--- a/src/tools/babel/webpack-loader.js
+++ b/src/tools/babel/webpack-loader.js
@@ -99,7 +99,7 @@ exports.default = (0, babel_loader_1.custom)(() => {
                 customOptions.optimize = {
                     // Angular packages provide additional tested side effects guarantees and can use
                     // otherwise unsafe optimizations. (@angular/platform-server/init) however has side-effects.
-                    pureTopLevel: AngularPackage && sideEffectFree,
+                    topLevelSafeMode: !(AngularPackage && sideEffectFree),
                     // JavaScript modules that are marked as side effect free are considered to have
                     // no decorators that contain non-local effects.
                     wrapDecorators: sideEffectFree,
diff --git a/src/tools/webpack/configs/styles.js b/src/tools/webpack/configs/styles.js
index 0dc63bcc7..5c8b31ea1 100644
--- a/src/tools/webpack/configs/styles.js
+++ b/src/tools/webpack/configs/styles.js
@@ -46,7 +46,6 @@ Object.defineProperty(exports, "__esModule", { value: true });
 exports.getStylesConfig = getStylesConfig;
 const private_1 = require("@angular/build/private");
 const mini_css_extract_plugin_1 = __importDefault(require("mini-css-extract-plugin"));
-const node_module_1 = require("node:module");
 const path = __importStar(require("node:path"));
 const node_url_1 = require("node:url");
 const plugins_1 = require("../plugins");
@@ -89,9 +88,9 @@ async function getStylesConfig(wco) {
     const searchDirectories = await (0, private_1.generateSearchDirectories)([projectRoot, root]);
     const postcssConfig = await (0, private_1.loadPostcssConfiguration)(searchDirectories);
     if (postcssConfig) {
-        const postCssPluginRequire = (0, node_module_1.createRequire)(path.dirname(postcssConfig.configPath) + '/');
-        for (const [pluginName, pluginOptions] of postcssConfig.config.plugins) {
-            const plugin = postCssPluginRequire(pluginName);
+        for (const [pluginName, pluginOptions] of postcssConfig.plugins) {
+            const resolvedPlugin = require.resolve(pluginName, { paths: [root] });
+            const { default: plugin } = await Promise.resolve(`${resolvedPlugin}`).then(s => __importStar(require(s)));
             if (typeof plugin !== 'function' || plugin.postcss !== true) {
                 throw new Error(`Attempted to load invalid Postcss plugin: "${pluginName}"`);
             }
diff --git a/src/tools/webpack/utils/helpers.js b/src/tools/webpack/utils/helpers.js
index 64dd97f97..233948bd6 100644
--- a/src/tools/webpack/utils/helpers.js
+++ b/src/tools/webpack/utils/helpers.js
@@ -39,6 +39,9 @@ var __importStar = (this && this.__importStar) || (function () {
         return result;
     };
 })();
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.getOutputHashFormat = getOutputHashFormat;
 exports.normalizeExtraEntryPoints = normalizeExtraEntryPoints;
@@ -50,9 +53,9 @@ exports.globalScriptsByBundleName = globalScriptsByBundleName;
 exports.assetPatterns = assetPatterns;
 exports.getStatsOptions = getStatsOptions;
 exports.isPackageInstalled = isPackageInstalled;
+const fast_glob_1 = __importDefault(require("fast-glob"));
 const node_crypto_1 = require("node:crypto");
 const path = __importStar(require("node:path"));
-const tinyglobby_1 = require("tinyglobby");
 const schema_1 = require("../../../builders/browser/schema");
 const package_version_1 = require("../../../utils/package-version");
 function getOutputHashFormat(outputHashing = schema_1.OutputHashing.None, length = 20) {
@@ -136,7 +139,7 @@ function getInstrumentationExcludedPaths(root, excludedPaths) {
     const excluded = new Set();
     for (const excludeGlob of excludedPaths) {
         const excludePath = excludeGlob[0] === '/' ? excludeGlob.slice(1) : excludeGlob;
-        (0, tinyglobby_1.globSync)(excludePath, { cwd: root }).forEach((p) => excluded.add(path.join(root, p)));
+        fast_glob_1.default.sync(excludePath, { cwd: root }).forEach((p) => excluded.add(path.join(root, p)));
     }
     return excluded;
 }
diff --git a/src/utils/copy-assets.js b/src/utils/copy-assets.js
index b787eead5..68df420cc 100644
--- a/src/utils/copy-assets.js
+++ b/src/utils/copy-assets.js
@@ -11,15 +11,15 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.copyAssets = copyAssets;
+const fast_glob_1 = __importDefault(require("fast-glob"));
 const node_fs_1 = __importDefault(require("node:fs"));
 const node_path_1 = __importDefault(require("node:path"));
-const tinyglobby_1 = require("tinyglobby");
 async function copyAssets(entries, basePaths, root, changed) {
     const defaultIgnore = ['.gitkeep', '**/.DS_Store', '**/Thumbs.db'];
     const outputFiles = [];
     for (const entry of entries) {
         const cwd = node_path_1.default.resolve(root, entry.input);
-        const files = await (0, tinyglobby_1.glob)(entry.glob, {
+        const files = await (0, fast_glob_1.default)(entry.glob, {
             cwd,
             dot: true,
             ignore: entry.ignore ? defaultIgnore.concat(entry.ignore) : defaultIgnore,
diff --git a/src/utils/normalize-cache.js b/src/utils/normalize-cache.js
index 9cde9fe59..e1f5e3a99 100644
--- a/src/utils/normalize-cache.js
+++ b/src/utils/normalize-cache.js
@@ -10,7 +10,7 @@ Object.defineProperty(exports, "__esModule", { value: true });
 exports.normalizeCacheOptions = normalizeCacheOptions;
 const node_path_1 = require("node:path");
 /** Version placeholder is replaced during the build process with actual package version */
-const VERSION = '21.0.0-next.2+sha-9749ec6';
+const VERSION = '20.3.4+sha-d8ca86b';
 function hasCacheMetadata(value) {
     return (!!value &&
         typeof value === 'object' &&
diff --git a/src/utils/test-files.d.ts b/src/utils/test-files.d.ts
index e6d7da17e..a0e29546b 100644
--- a/src/utils/test-files.d.ts
+++ b/src/utils/test-files.d.ts
@@ -5,7 +5,7 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.dev/license
  */
-import { glob as globFn } from 'tinyglobby';
+import fastGlob from 'fast-glob';
 /**
  * Finds all test files in the project.
  *
@@ -15,4 +15,4 @@ import { glob as globFn } from 'tinyglobby';
  *     testing purposes.
  * @returns A set of all test files in the project.
  */
-export declare function findTestFiles(include: string[], exclude: string[], workspaceRoot: string, glob?: typeof globFn): Promise<Set<string>>;
+export declare function findTestFiles(include: string[], exclude: string[], workspaceRoot: string, glob?: typeof fastGlob): Promise<Set<string>>;
diff --git a/src/utils/test-files.js b/src/utils/test-files.js
index 551550059..a1cd6b355 100644
--- a/src/utils/test-files.js
+++ b/src/utils/test-files.js
@@ -6,9 +6,12 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.dev/license
  */
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.findTestFiles = findTestFiles;
-const tinyglobby_1 = require("tinyglobby");
+const fast_glob_1 = __importDefault(require("fast-glob"));
 /**
  * Finds all test files in the project.
  *
@@ -18,7 +21,7 @@ const tinyglobby_1 = require("tinyglobby");
  *     testing purposes.
  * @returns A set of all test files in the project.
  */
-async function findTestFiles(include, exclude, workspaceRoot, glob = tinyglobby_1.glob) {
+async function findTestFiles(include, exclude, workspaceRoot, glob = fast_glob_1.default) {
     const globOptions = {
         cwd: workspaceRoot,
         ignore: ['node_modules/**'].concat(exclude),
diff --git a/uniqueId b/uniqueId
index c6638e7b8..75639618c 100644
--- a/uniqueId
+++ b/uniqueId
@@ -1 +1 @@
-Tue Sep 09 2025 16:40:21 GMT+0000 (Coordinated Universal Time)
\ No newline at end of file
+Sat Oct 04 2025 13:27:19 GMT+0000 (Coordinated Universal Time)
\ No newline at end of file