diff --git a/.buildkite/scripts/steps/security/third_party_packages.txt b/.buildkite/scripts/steps/security/third_party_packages.txt
index a0754034aed94..bcdda8a14b75a 100644
--- a/.buildkite/scripts/steps/security/third_party_packages.txt
+++ b/.buildkite/scripts/steps/security/third_party_packages.txt
@@ -25,3 +25,7 @@ ink
 @hey-api/openapi-ts
 vscode-languageserver-textdocument
 yaml-language-server
+@swc/core
+lightningcss
+tar-fs
+browserslist
diff --git a/package.json b/package.json
index d4b284f502052..ae734f793e6ea 100644
--- a/package.json
+++ b/package.json
@@ -1771,6 +1771,7 @@
     "@storybook/test": "8.6.17",
     "@storybook/theming": "8.6.17",
     "@storybook/types": "8.6.17",
+    "@swc/core": "1.15.18",
     "@testing-library/dom": "10.4.1",
     "@testing-library/jest-dom": "6.9.1",
     "@testing-library/react": "16.3.2",
@@ -1914,6 +1915,7 @@
     "babel-plugin-transform-typescript-metadata": "0.3.2",
     "backport": "10.2.0",
     "blob-polyfill": "9.0.20240710",
+    "browserslist": "4.28.0",
     "buildkite-test-collector": "1.8.1",
     "cache-manager": "7.0.0",
     "cache-manager-fs-hash": "2.0.0",
@@ -2000,6 +2002,7 @@
     "keyv": "5.3.4",
     "license-checker": "25.0.1",
     "lighthouse": "12.8.2",
+    "lightningcss": "1.31.1",
     "listr2": "8.2.5",
     "lmdb": "3.4.4",
     "marge": "1.0.1",
@@ -2058,6 +2061,7 @@
     "swagger-ui-express": "5.0.1",
     "table": "6.9.0",
     "tape": "5.9.0",
+    "tar-fs": "3.1.1",
     "terser": "5.40.0",
     "terser-webpack-plugin": "5.3.17",
     "tough-cookie": "6.0.0",
diff --git a/packages/kbn-yarn-install-scripts/config.json b/packages/kbn-yarn-install-scripts/config.json
index 5098ef8699e7a..362ef09938ecc 100644
--- a/packages/kbn-yarn-install-scripts/config.json
+++ b/packages/kbn-yarn-install-scripts/config.json
@@ -113,6 +113,12 @@
       "lifecycle": "install",
       "required": false,
       "reason": "Builds from source if npm_config_build_from_source=true.  Prebuilds are sufficient."
+    },
+    {
+      "path": "@swc/core",
+      "lifecycle": "postinstall",
+      "required": false,
+      "reason": "Builds native for @swc/core, used by proxy at src/dev/build to optimize assets.  Prebuilds are sufficient."
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/renovate.json b/renovate.json
index a007b32ee3752..78d9b961cc4a8 100644
--- a/renovate.json
+++ b/renovate.json
@@ -4868,6 +4868,42 @@
       ],
       "enabled": true,
       "minimumReleaseAge": "14 days"
+    },
+    {
+      "groupName": "@swc/core",
+      "matchDepNames": ["@swc/core"],
+      "reviewers": ["team:kibana-operations"],
+      "matchBaseBranches": ["main"],
+      "labels": ["Team:Operations", "release_note:skip"],
+      "minimumReleaseAge": "14 days",
+      "enabled": true
+    },
+    {
+      "groupName": "lightningcss",
+      "matchDepNames": ["lightningcss"],
+      "reviewers": ["team:kibana-operations"],
+      "matchBaseBranches": ["main"],
+      "labels": ["Team:Operations", "release_note:skip"],
+      "minimumReleaseAge": "14 days",
+      "enabled": true
+    },
+    {
+      "groupName": "tar-fs",
+      "matchDepNames": ["tar-fs"],
+      "reviewers": ["team:kibana-operations"],
+      "matchBaseBranches": ["main"],
+      "labels": ["Team:Operations", "release_note:skip"],
+      "minimumReleaseAge": "14 days",
+      "enabled": true
+    },
+    {
+      "groupName": "browserslist",
+      "matchDepNames": ["browserslist"],
+      "reviewers": ["team:kibana-operations"],
+      "matchBaseBranches": ["main"],
+      "labels": ["Team:Operations", "release_note:skip"],
+      "minimumReleaseAge": "14 days",
+      "enabled": true
     }
   ],
   "customManagers": [
@@ -4906,4 +4942,4 @@
       "datasourceTemplate": "docker"
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/src/dev/build/build_distributables.ts b/src/dev/build/build_distributables.ts
index 9cd5e42d11e75..7f48786aaf147 100644
--- a/src/dev/build/build_distributables.ts
+++ b/src/dev/build/build_distributables.ts
@@ -88,10 +88,12 @@ export async function buildDistributables(log: ToolingLog, options: BuildOptions
     await globalRun(Tasks.CreateXPackNoticeFile);
 
     await globalRun(Tasks.DeletePackagesFromBuildRoot);
+
     await globalRun(Tasks.UpdateLicenseFile);
     await globalRun(Tasks.RemovePackageJsonDeps);
     await globalRun(Tasks.CleanPackageManagerRelatedFiles);
     await globalRun(Tasks.CleanExtraFilesFromModules);
+
     await globalRun(Tasks.CleanEmptyFolders);
     await globalRun(Tasks.FetchAgentVersionsList);
   }
diff --git a/src/dev/build/lib/fs.ts b/src/dev/build/lib/fs.ts
index 57ff0078dbe58..aed84eb566560 100644
--- a/src/dev/build/lib/fs.ts
+++ b/src/dev/build/lib/fs.ts
@@ -12,8 +12,8 @@ import Fsp from 'fs/promises';
 import * as Rx from 'rxjs';
 import { createHash } from 'crypto';
 import { pipeline } from 'stream/promises';
-import { resolve, dirname, isAbsolute, sep } from 'path';
-import { createGunzip } from 'zlib';
+import { resolve, dirname, isAbsolute, basename, sep } from 'path';
+import { createGunzip, createGzip } from 'zlib';
 import { inspect } from 'util';
 
 import archiver from 'archiver';
@@ -21,6 +21,7 @@ import globby from 'globby';
 import cpy from 'cpy';
 import del from 'del';
 import * as tar from 'tar';
+import { pack as tarFsPack } from 'tar-fs';
 import type { ToolingLog } from '@kbn/tooling-log';
 
 export function assertAbsolute(path: string) {
@@ -231,29 +232,37 @@ interface CompressTarOptions {
   rootDirectoryName?: string;
   source: string;
   destination: string;
-  archiverOptions?: archiver.TarOptions & archiver.CoreOptions;
+  gzipLevel?: number;
 }
 export async function compressTar({
   source,
   destination,
-  archiverOptions,
+  gzipLevel = 9,
   createRootDirectory,
   rootDirectoryName,
-}: CompressTarOptions) {
-  const output = fs.createWriteStream(destination);
-  const archive = archiver('tar', archiverOptions);
-  const folder = rootDirectoryName ? rootDirectoryName : source.split(sep).slice(-1)[0];
-  const name = createRootDirectory ? folder : false;
-  archive.pipe(output);
+}: CompressTarOptions): Promise<number> {
+  assertAbsolute(source);
+  assertAbsolute(destination);
+
+  const folder = rootDirectoryName || basename(source);
 
   let fileCount = 0;
-  archive.on('entry', (entry) => {
-    if (entry.stats?.isFile()) {
-      fileCount += 1;
-    }
+  const packStream = tarFsPack(source, {
+    map(header) {
+      if (header.type === 'file') {
+        fileCount += 1;
+      }
+      if (createRootDirectory) {
+        header.name = folder + '/' + header.name;
+      }
+      return header;
+    },
   });
 
-  await archive.directory(source, name).finalize();
+  const gzip = createGzip({ level: gzipLevel });
+  const output = fs.createWriteStream(destination);
+
+  await pipeline(packStream, gzip, output);
 
   return fileCount;
 }
@@ -271,7 +280,10 @@ export async function compressZip({
   archiverOptions,
   createRootDirectory,
   rootDirectoryName,
-}: CompressZipOptions) {
+}: CompressZipOptions): Promise<number> {
+  assertAbsolute(source);
+  assertAbsolute(destination);
+
   const output = fs.createWriteStream(destination);
   const archive = archiver('zip', archiverOptions);
   const folder = rootDirectoryName ? rootDirectoryName : source.split(sep).slice(-1)[0];
diff --git a/src/dev/build/lib/integration_tests/fs.test.ts b/src/dev/build/lib/integration_tests/fs.test.ts
index 4a24da0e0b5f6..5dba23f31ebd0 100644
--- a/src/dev/build/lib/integration_tests/fs.test.ts
+++ b/src/dev/build/lib/integration_tests/fs.test.ts
@@ -12,7 +12,17 @@ import { chmodSync, statSync } from 'fs';
 
 import del from 'del';
 
-import { mkdirp, write, read, getChildPaths, copyAll, getFileHash, untar, gunzip } from '../fs';
+import {
+  mkdirp,
+  write,
+  read,
+  getChildPaths,
+  copyAll,
+  getFileHash,
+  untar,
+  gunzip,
+  compressTar,
+} from '../fs';
 import { getFips } from 'crypto';
 
 const TMP = resolve(__dirname, '../__tmp__');
@@ -356,3 +366,66 @@ describe('gunzip()', () => {
     expect(await read(resolve(destination))).toBe('foo\n');
   });
 });
+
+describe('compressTar()', () => {
+  it('creates a valid .tar.gz that can be extracted with untar', async () => {
+    const tarPath = resolve(TMP, 'test.tar.gz');
+    const fileCount = await compressTar({
+      source: resolve(FIXTURES, 'foo_dir'),
+      destination: tarPath,
+      createRootDirectory: false,
+    });
+
+    expect(fileCount).toBeGreaterThan(0);
+    expect(statSync(tarPath).size).toBeGreaterThan(0);
+
+    const extracted = resolve(TMP, 'extracted');
+    await untar(tarPath, extracted);
+
+    expect(await read(resolve(extracted, 'bar.txt'))).toBe('bar\n');
+    expect(await read(resolve(extracted, 'foo/foo.txt'))).toBe('foo\n');
+  });
+
+  it('wraps contents in a root directory when createRootDirectory is true', async () => {
+    const tarPath = resolve(TMP, 'rooted.tar.gz');
+    await compressTar({
+      source: resolve(FIXTURES, 'foo_dir'),
+      destination: tarPath,
+      createRootDirectory: true,
+    });
+
+    const extracted = resolve(TMP, 'extracted_rooted');
+    await untar(tarPath, extracted);
+
+    expect(await read(resolve(extracted, 'foo_dir/bar.txt'))).toBe('bar\n');
+    expect(await read(resolve(extracted, 'foo_dir/foo/foo.txt'))).toBe('foo\n');
+  });
+
+  it('uses rootDirectoryName when provided', async () => {
+    const tarPath = resolve(TMP, 'custom_root.tar.gz');
+    await compressTar({
+      source: resolve(FIXTURES, 'foo_dir'),
+      destination: tarPath,
+      createRootDirectory: true,
+      rootDirectoryName: 'my-custom-root',
+    });
+
+    const extracted = resolve(TMP, 'extracted_custom');
+    await untar(tarPath, extracted);
+
+    expect(await read(resolve(extracted, 'my-custom-root/bar.txt'))).toBe('bar\n');
+    expect(await read(resolve(extracted, 'my-custom-root/foo/foo.txt'))).toBe('foo\n');
+  });
+
+  it('returns accurate file count', async () => {
+    const tarPath = resolve(TMP, 'count.tar.gz');
+    const fileCount = await compressTar({
+      source: resolve(FIXTURES, 'foo_dir'),
+      destination: tarPath,
+      createRootDirectory: false,
+    });
+
+    // foo_dir contains: .bar, bar.txt, foo/foo.txt
+    expect(fileCount).toBe(3);
+  });
+});
diff --git a/src/dev/build/lib/scan_copy.ts b/src/dev/build/lib/scan_copy.ts
index 5909cf53df878..ac166d1f3a061 100644
--- a/src/dev/build/lib/scan_copy.ts
+++ b/src/dev/build/lib/scan_copy.ts
@@ -14,6 +14,9 @@ import * as Rx from 'rxjs';
 import { assertAbsolute, mkdirp, fsReadDir$ } from './fs';
 import { type DirRecord, type FileRecord, type Record, SomePath } from './fs_records';
 
+// Exclusive create + copy-on-write (reflink) when the filesystem supports it
+const COPY_FLAGS = Fs.constants.COPYFILE_EXCL + Fs.constants.COPYFILE_FICLONE;
+
 interface Options {
   /**
    * directory to copy from
@@ -73,7 +76,7 @@ export async function scanCopy(options: Options) {
         }
 
         return Rx.of(rec);
-      })
+      }, 100)
     );
 
   const handleGenericRec = async (rec: Record) => {
@@ -95,7 +98,7 @@ export async function scanCopy(options: Options) {
       await handleGenericRec(rec);
     }).pipe(
       Rx.mergeMap(() => readDir$(rec)),
-      Rx.mergeMap((ent) => (ent.type === 'dir' ? handleDir$(ent) : handleFile$(ent)))
+      Rx.mergeMap((ent) => (ent.type === 'dir' ? handleDir$(ent) : handleFile$(ent)), 100)
     );
 
   const handleFile$ = (srcRec: FileRecord): Rx.Observable<unknown> =>
@@ -107,7 +110,7 @@ export async function scanCopy(options: Options) {
           flag: 'wx',
         });
       } else {
-        await Fsp.copyFile(rec.source.abs, rec.dest.abs, Fs.constants.COPYFILE_EXCL);
+        await Fsp.copyFile(rec.source.abs, rec.dest.abs, COPY_FLAGS);
       }
 
       await handleGenericRec(rec);
diff --git a/src/dev/build/lib/scan_delete.ts b/src/dev/build/lib/scan_delete.ts
index 2ebaede02c479..b45e075aae116 100644
--- a/src/dev/build/lib/scan_delete.ts
+++ b/src/dev/build/lib/scan_delete.ts
@@ -68,7 +68,7 @@ export async function scanDelete(directory: string, options: Options) {
     getPathsToDelete$(directory).pipe(
       Rx.mergeMap(
         async (path) => await Fsp.rm(path, { recursive: true, maxRetries: 1 }),
-        options.concurrency
+        options.concurrency ?? 20
       ),
       Rx.count()
     )
diff --git a/src/dev/build/lib/tar_fs.d.ts b/src/dev/build/lib/tar_fs.d.ts
new file mode 100644
index 0000000000000..46d456b3ac4e7
--- /dev/null
+++ b/src/dev/build/lib/tar_fs.d.ts
@@ -0,0 +1,17 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+declare module 'tar-fs' {
+  interface PackOptions {
+    map?: (header: { name: string; type: string }) => { name: string; type: string };
+    filter?: (name: string) => boolean;
+  }
+
+  function pack(cwd: string, opts?: PackOptions): NodeJS.ReadableStream;
+}
diff --git a/src/dev/build/tasks/build_packages_task.ts b/src/dev/build/tasks/build_packages_task.ts
index f7d5206a98e94..8ee4d76fe70fd 100644
--- a/src/dev/build/tasks/build_packages_task.ts
+++ b/src/dev/build/tasks/build_packages_task.ts
@@ -9,10 +9,11 @@
 
 import Path from 'path';
 import * as Fsp from 'fs/promises';
+import { cpus } from 'os';
 
 import * as Peggy from '@kbn/peggy';
 import * as DotText from '@kbn/dot-text';
-import { asyncForEach } from '@kbn/std';
+import { asyncForEachWithLimit } from '@kbn/std';
 import type { TransformConfig } from '@kbn/babel-transform';
 import { withFastAsyncTransform } from '@kbn/babel-transform';
 import { makeMatcher } from '@kbn/picomatcher';
@@ -121,7 +122,7 @@ export const BuildPackages: Task = {
     };
 
     await withFastAsyncTransform(transformConfig, async (transform) => {
-      await asyncForEach(packages, async (pkg) => {
+      await asyncForEachWithLimit(packages, cpus().length, async (pkg) => {
         const allPaths = new Set(Array.from(pkgFileMap.getFiles(pkg), (p) => p.abs));
         const pkgDistPath = build.resolvePath(pkg.normalizedRepoRelativeDir);
         const peggyConfigOutputPaths = new Set<string>();
diff --git a/src/dev/build/tasks/create_archives_task.ts b/src/dev/build/tasks/create_archives_task.ts
index b5e823c99d15c..93256aca19f7f 100644
--- a/src/dev/build/tasks/create_archives_task.ts
+++ b/src/dev/build/tasks/create_archives_task.ts
@@ -49,7 +49,7 @@ export const CreateArchives: Task = {
                 destination,
                 archiverOptions: {
                   zlib: {
-                    level: 9,
+                    level: config.isRelease ? 9 : 6,
                   },
                 },
                 createRootDirectory: true,
@@ -65,12 +65,7 @@ export const CreateArchives: Task = {
               fileCount: await compressTar({
                 source,
                 destination,
-                archiverOptions: {
-                  gzip: true,
-                  gzipOptions: {
-                    level: 9,
-                  },
-                },
+                gzipLevel: config.isRelease ? 9 : 6,
                 createRootDirectory: true,
                 rootDirectoryName: build.getRootDirectory(platform),
               }),
diff --git a/src/dev/build/tasks/create_cdn_assets_task.ts b/src/dev/build/tasks/create_cdn_assets_task.ts
index 0eae63d9980f1..f998629d30136 100644
--- a/src/dev/build/tasks/create_cdn_assets_task.ts
+++ b/src/dev/build/tasks/create_cdn_assets_task.ts
@@ -108,12 +108,7 @@ export const CreateCdnAssets: Task = {
     await compressTar({
       source: assets,
       destination: config.resolveFromTarget(`kibana-${buildVersion}-cdn-assets.tar.gz`),
-      archiverOptions: {
-        gzip: true,
-        gzipOptions: {
-          level: 9,
-        },
-      },
+      gzipLevel: 6,
       createRootDirectory: true,
       rootDirectoryName: `kibana-${buildVersion}-cdn-assets`,
     });
diff --git a/src/dev/build/tasks/generate_packages_optimized_assets.ts b/src/dev/build/tasks/generate_packages_optimized_assets.ts
index 64b8747185e5e..930c2ae369557 100644
--- a/src/dev/build/tasks/generate_packages_optimized_assets.ts
+++ b/src/dev/build/tasks/generate_packages_optimized_assets.ts
@@ -8,64 +8,78 @@
  */
 
 import Path from 'path';
-
-import { pipeline } from 'stream';
-import { promisify } from 'util';
+import Fsp from 'fs/promises';
 import fs from 'fs';
+import zlib from 'zlib';
+import { cpus } from 'os';
+import { promisify } from 'util';
 
-import gulpBrotli from 'gulp-brotli';
-// @ts-expect-error
-import gulpPostCSS from 'gulp-postcss';
-// @ts-expect-error
-import gulpTerser from 'gulp-terser';
+import { minify } from '@swc/core';
+import { transform as lightningTransform, browserslistToTargets } from 'lightningcss';
+import browserslist from 'browserslist';
+import { asyncForEachWithLimit } from '@kbn/std';
 import type { ToolingLog } from '@kbn/tooling-log';
-import terser from 'terser';
-import vfs from 'vinyl-fs';
 import globby from 'globby';
 import del from 'del';
-import zlib from 'zlib';
 
 import type { Task } from '../lib';
 import { write } from '../lib';
 
 const EUI_THEME_RE = /\.v\d\.(light|dark)\.css$/;
 const ASYNC_CHUNK_RE = /\.chunk\.\d+\.js$/;
-const asyncPipeline = promisify(pipeline);
 
 const getSize = (paths: string[]) => paths.reduce((acc, path) => acc + fs.statSync(path).size, 0);
 
-async function optimizeAssets(log: ToolingLog, assetDir: string) {
+const BROTLI_QUALITY_RELEASE = zlib.constants.BROTLI_MAX_QUALITY;
+const BROTLI_QUALITY_SNAPSHOT = 9;
+const PARALLEL_CONCURRENCY = cpus().length;
+const brotliCompressAsync = promisify(zlib.brotliCompress);
+const cssTargets = browserslistToTargets(browserslist());
+
+async function optimizeAssets(log: ToolingLog, assetDir: string, brotliQuality: number) {
   log.info('Creating optimized assets for', assetDir);
   log.indent(4);
   try {
     log.debug('Remove Pre Minify Sourcemaps');
     await del(['**/*.map'], { cwd: assetDir });
 
-    log.debug('Minify CSS');
-    await asyncPipeline(
-      vfs.src(['**/*.css'], { cwd: assetDir }),
-      // eslint-disable-next-line @typescript-eslint/no-var-requires
-      gulpPostCSS(require('@kbn/optimizer/postcss.config').plugins),
-      vfs.dest(assetDir)
-    );
-
-    log.debug('Minify JS');
-    await asyncPipeline(
-      vfs.src(['**/*.js'], { cwd: assetDir }),
-      gulpTerser({ compress: { passes: 2 }, mangle: true }, terser.minify),
-      vfs.dest(assetDir)
-    );
+    log.debug('Minify CSS with Lightning CSS');
+    const cssFiles = await globby(['**/*.css'], { cwd: assetDir, absolute: true });
+    // lightningcss only exposes a synchronous transform() API (no async variant)
+    await asyncForEachWithLimit(cssFiles, PARALLEL_CONCURRENCY, async (file) => {
+      const code = await Fsp.readFile(file);
+      const result = lightningTransform({
+        filename: Path.basename(file),
+        code,
+        minify: true,
+        targets: cssTargets,
+      });
+      await Fsp.writeFile(file, result.code);
+    });
+
+    log.debug('Minify JS with SWC');
+    const jsFiles = await globby(['**/*.js'], { cwd: assetDir, absolute: true });
+    await asyncForEachWithLimit(jsFiles, PARALLEL_CONCURRENCY, async (file) => {
+      const source = await Fsp.readFile(file, 'utf8');
+      const result = await minify(source, {
+        compress: { passes: 2 },
+        mangle: true,
+        sourceMap: false,
+      });
+      await Fsp.writeFile(file, result.code);
+    });
 
     log.debug('Brotli compress');
-    await asyncPipeline(
-      vfs.src(['**/*.{js,css}'], { cwd: assetDir }),
-      gulpBrotli({
+    const compressFiles = await globby(['**/*.{js,css}'], { cwd: assetDir, absolute: true });
+    await asyncForEachWithLimit(compressFiles, PARALLEL_CONCURRENCY, async (file) => {
+      const content = await Fsp.readFile(file);
+      const compressed = await brotliCompressAsync(content, {
         params: {
-          [zlib.constants.BROTLI_PARAM_QUALITY]: zlib.constants.BROTLI_MAX_QUALITY,
+          [zlib.constants.BROTLI_PARAM_QUALITY]: brotliQuality,
         },
-      }),
-      vfs.dest(assetDir)
-    );
+      });
+      await Fsp.writeFile(file + '.br', compressed);
+    });
   } finally {
     log.indent(-4);
   }
@@ -148,9 +162,11 @@ export const GeneratePackagesOptimizedAssets: Task = {
     );
     const assetDirs = [npmAssetDir, srcAssetDir];
 
+    const brotliQuality = config.isRelease ? BROTLI_QUALITY_RELEASE : BROTLI_QUALITY_SNAPSHOT;
+
     // process assets in each ui-shared-deps package
     for (const assetDir of assetDirs) {
-      await optimizeAssets(log, assetDir);
+      await optimizeAssets(log, assetDir, brotliQuality);
     }
 
     // analyze assets to produce metrics.json file
diff --git a/src/dev/build/tasks/os_packages/docker_generator/bundle_dockerfiles.ts b/src/dev/build/tasks/os_packages/docker_generator/bundle_dockerfiles.ts
index 0fce2566d0f80..13aaaf2a61746 100644
--- a/src/dev/build/tasks/os_packages/docker_generator/bundle_dockerfiles.ts
+++ b/src/dev/build/tasks/os_packages/docker_generator/bundle_dockerfiles.ts
@@ -69,12 +69,7 @@ export async function bundleDockerFiles(config: Config, log: ToolingLog, scope:
   await compressTar({
     source: dockerFilesBuildDir,
     destination: dockerFilesOutputDir,
-    archiverOptions: {
-      gzip: true,
-      gzipOptions: {
-        level: 9,
-      },
-    },
+    gzipLevel: config.isRelease ? 9 : 6,
     createRootDirectory: false,
   });
 }
diff --git a/src/dev/license_checker/config.ts b/src/dev/license_checker/config.ts
index 178d9d40b82a5..ce9a45c244425 100644
--- a/src/dev/license_checker/config.ts
+++ b/src/dev/license_checker/config.ts
@@ -70,6 +70,7 @@ export const LICENSE_ALLOWED = [
   'Nuclide software',
   'Python-2.0',
   '(Apache-2.0 AND MIT)',
+  'Apache-2.0 AND MIT',
   'BlueOak-1.0.0',
   'WTFPL OR CC0-1.0',
 ];
diff --git a/typings/tar_fs.d.ts b/typings/tar_fs.d.ts
new file mode 100644
index 0000000000000..9730e26f856b7
--- /dev/null
+++ b/typings/tar_fs.d.ts
@@ -0,0 +1,23 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+declare module 'tar-fs' {
+  interface PackOptions {
+    map?: (header: { name: string; type: string }) => { name: string; type: string };
+    filter?: (name: string) => boolean;
+  }
+
+  function pack(
+    cwd: string,
+    opts?: PackOptions
+  ): NodeJS.ReadableStream & {
+    on(event: 'entry', cb: (header: { type: string }) => void): void;
+    on(event: string, cb: (...args: unknown[]) => void): void;
+  };
+}
diff --git a/yarn.lock b/yarn.lock
index 418aa0a884a46..eddfdadb9a6a0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12748,6 +12748,80 @@
   resolved "https://registry.yarnpkg.com/@storybook/types/-/types-8.6.17.tgz#720ccd40f57459f96361e2bfca8dc01f3734cf93"
   integrity sha512-nNlbGulqqk2XzroD5jxcsw+13nWlGxBD9XRAht4Peh71Z4OcdBJCnc9UmHkTgUakmRJ/T6p7xabURDG3KpayIQ==
 
+"@swc/core-darwin-arm64@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-darwin-arm64/-/core-darwin-arm64-1.15.18.tgz#fb487392f7bbe3179166b9b0d128916e39a627af"
+  integrity sha512-+mIv7uBuSaywN3C9LNuWaX1jJJ3SKfiJuE6Lr3bd+/1Iv8oMU7oLBjYMluX1UrEPzwN2qCdY6Io0yVicABoCwQ==
+
+"@swc/core-darwin-x64@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-darwin-x64/-/core-darwin-x64-1.15.18.tgz#0e11fb0a80ebd56cb4417138a938ffc789ead492"
+  integrity sha512-wZle0eaQhnzxWX5V/2kEOI6Z9vl/lTFEC6V4EWcn+5pDjhemCpQv9e/TDJ0GIoiClX8EDWRvuZwh+Z3dhL1NAg==
+
+"@swc/core-linux-arm-gnueabihf@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-linux-arm-gnueabihf/-/core-linux-arm-gnueabihf-1.15.18.tgz#e7cac4b46d66dfd6b0fedea68877a5678fcf3579"
+  integrity sha512-ao61HGXVqrJFHAcPtF4/DegmwEkVCo4HApnotLU8ognfmU8x589z7+tcf3hU+qBiU1WOXV5fQX6W9Nzs6hjxDw==
+
+"@swc/core-linux-arm64-gnu@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-linux-arm64-gnu/-/core-linux-arm64-gnu-1.15.18.tgz#ca888f41be89887f9f6b4afd1cc38a1a596a655d"
+  integrity sha512-3xnctOBLIq3kj8PxOCgPrGjBLP/kNOddr6f5gukYt/1IZxsITQaU9TDyjeX6jG+FiCIHjCuWuffsyQDL5Ew1bg==
+
+"@swc/core-linux-arm64-musl@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-linux-arm64-musl/-/core-linux-arm64-musl-1.15.18.tgz#292bb894cf08be522487897f6e2a616cbdd6198a"
+  integrity sha512-0a+Lix+FSSHBSBOA0XznCcHo5/1nA6oLLjcnocvzXeqtdjnPb+SvchItHI+lfeiuj1sClYPDvPMLSLyXFaiIKw==
+
+"@swc/core-linux-x64-gnu@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-linux-x64-gnu/-/core-linux-x64-gnu-1.15.18.tgz#2241fd6a01d88bac32334812660d80ebae88fd12"
+  integrity sha512-wG9J8vReUlpaHz4KOD/5UE1AUgirimU4UFT9oZmupUDEofxJKYb1mTA/DrMj0s78bkBiNI+7Fo2EgPuvOJfuAA==
+
+"@swc/core-linux-x64-musl@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-linux-x64-musl/-/core-linux-x64-musl-1.15.18.tgz#7d70f02a383d9dbae18b0d2906ee8b49dfb0b533"
+  integrity sha512-4nwbVvCphKzicwNWRmvD5iBaZj8JYsRGa4xOxJmOyHlMDpsvvJ2OR2cODlvWyGFH6BYL1MfIAK3qph3hp0Az6g==
+
+"@swc/core-win32-arm64-msvc@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-win32-arm64-msvc/-/core-win32-arm64-msvc-1.15.18.tgz#6ea2b41d224a5ac84e1addf19fbc584e49698b08"
+  integrity sha512-zk0RYO+LjiBCat2RTMHzAWaMky0cra9loH4oRrLKLLNuL+jarxKLFDA8xTZWEkCPLjUTwlRN7d28eDLLMgtUcQ==
+
+"@swc/core-win32-ia32-msvc@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-win32-ia32-msvc/-/core-win32-ia32-msvc-1.15.18.tgz#0c498802837ef53452c744964cac1391eb889e4d"
+  integrity sha512-yVuTrZ0RccD5+PEkpcLOBAuPbYBXS6rslENvIXfvJGXSdX5QGi1ehC4BjAMl5FkKLiam4kJECUI0l7Hq7T1vwg==
+
+"@swc/core-win32-x64-msvc@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core-win32-x64-msvc/-/core-win32-x64-msvc-1.15.18.tgz#878b48b38225680aad1e486880a6835461519e53"
+  integrity sha512-7NRmE4hmUQNCbYU3Hn9Tz57mK9Qq4c97ZS+YlamlK6qG9Fb5g/BB3gPDe0iLlJkns/sYv2VWSkm8c3NmbEGjbg==
+
+"@swc/core@1.15.18":
+  version "1.15.18"
+  resolved "https://registry.yarnpkg.com/@swc/core/-/core-1.15.18.tgz#9eed29c0267d2c262391d4a2e75a3978e3f9dc74"
+  integrity sha512-z87aF9GphWp//fnkRsqvtY+inMVPgYW3zSlXH1kJFvRT5H/wiAn+G32qW5l3oEk63KSF1x3Ov0BfHCObAmT8RA==
+  dependencies:
+    "@swc/counter" "^0.1.3"
+    "@swc/types" "^0.1.25"
+  optionalDependencies:
+    "@swc/core-darwin-arm64" "1.15.18"
+    "@swc/core-darwin-x64" "1.15.18"
+    "@swc/core-linux-arm-gnueabihf" "1.15.18"
+    "@swc/core-linux-arm64-gnu" "1.15.18"
+    "@swc/core-linux-arm64-musl" "1.15.18"
+    "@swc/core-linux-x64-gnu" "1.15.18"
+    "@swc/core-linux-x64-musl" "1.15.18"
+    "@swc/core-win32-arm64-msvc" "1.15.18"
+    "@swc/core-win32-ia32-msvc" "1.15.18"
+    "@swc/core-win32-x64-msvc" "1.15.18"
+
+"@swc/counter@^0.1.3":
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/@swc/counter/-/counter-0.1.3.tgz#cc7463bd02949611c6329596fccd2b0ec782b0e9"
+  integrity sha512-e2BR4lsJkkRlKZ/qCHPw9ZaSxc0MVUd7gtbtaB7aMvHeJVYe8sOB8DBZkP2DtISHGSku9sCK6T6cnY0CtXrOCQ==
+
 "@swc/helpers@^0.5.11":
   version "0.5.15"
   resolved "https://registry.yarnpkg.com/@swc/helpers/-/helpers-0.5.15.tgz#79efab344c5819ecf83a43f3f9f811fc84b516d7"
@@ -12755,6 +12829,13 @@
   dependencies:
     tslib "^2.8.0"
 
+"@swc/types@^0.1.25":
+  version "0.1.25"
+  resolved "https://registry.yarnpkg.com/@swc/types/-/types-0.1.25.tgz#b517b2a60feb37dd933e542d93093719e4cf1078"
+  integrity sha512-iAoY/qRhNH8a/hBvm3zKj9qQ4oc2+3w1unPJa2XvTK3XjeLXtzcCingVPw/9e5mn1+0yPqxcBGp9Jf0pkfMb1g==
+  dependencies:
+    "@swc/counter" "^0.1.3"
+
 "@szmarczak/http-timer@^4.0.5":
   version "4.0.5"
   resolved "https://registry.yarnpkg.com/@szmarczak/http-timer/-/http-timer-4.0.5.tgz#bfbd50211e9dfa51ba07da58a14cdfd333205152"
@@ -16601,7 +16682,7 @@ browserify-zlib@^0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserslist@^4.0.0, browserslist@^4.20.3, browserslist@^4.23.0, browserslist@^4.24.0, browserslist@^4.24.5, browserslist@^4.27.0:
+browserslist@4.28.0, browserslist@^4.0.0, browserslist@^4.20.3, browserslist@^4.23.0, browserslist@^4.24.0, browserslist@^4.24.5, browserslist@^4.27.0:
   version "4.28.0"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.28.0.tgz#9cefece0a386a17a3cd3d22ebf67b9deca1b5929"
   integrity sha512-tbydkR/CxfMwelN0vwdP/pLkDwyAASZ+VfWm4EOwlB6SWhx1sYnWLqo8N5j0rAzPfzfRaxt0mM/4wPU/Su84RQ==
@@ -19199,7 +19280,7 @@ detect-libc@^1.0.3:
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
   integrity sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg==
 
-detect-libc@^2.0.1, detect-libc@^2.0.4, detect-libc@^2.1.0:
+detect-libc@^2.0.1, detect-libc@^2.0.3, detect-libc@^2.0.4, detect-libc@^2.1.0:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-2.1.2.tgz#689c5dcdc1900ef5583a4cb9f6d7b473742074ad"
   integrity sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==
@@ -25049,6 +25130,80 @@ lighthouse@12.8.2:
     yargs "^17.3.1"
     yargs-parser "^21.0.0"
 
+lightningcss-android-arm64@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-android-arm64/-/lightningcss-android-arm64-1.31.1.tgz#609ff48332adff452a8157a7c2842fd692a8eac4"
+  integrity sha512-HXJF3x8w9nQ4jbXRiNppBCqeZPIAfUo8zE/kOEGbW5NZvGc/K7nMxbhIr+YlFlHW5mpbg/YFPdbnCh1wAXCKFg==
+
+lightningcss-darwin-arm64@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-darwin-arm64/-/lightningcss-darwin-arm64-1.31.1.tgz#a13da040a7929582bab3ace9a67bdc146e99fc2d"
+  integrity sha512-02uTEqf3vIfNMq3h/z2cJfcOXnQ0GRwQrkmPafhueLb2h7mqEidiCzkE4gBMEH65abHRiQvhdcQ+aP0D0g67sg==
+
+lightningcss-darwin-x64@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-darwin-x64/-/lightningcss-darwin-x64-1.31.1.tgz#f7482c311273571ec0c2bd8277c1f5f6e90e03a4"
+  integrity sha512-1ObhyoCY+tGxtsz1lSx5NXCj3nirk0Y0kB/g8B8DT+sSx4G9djitg9ejFnjb3gJNWo7qXH4DIy2SUHvpoFwfTA==
+
+lightningcss-freebsd-x64@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-freebsd-x64/-/lightningcss-freebsd-x64-1.31.1.tgz#91df1bb290f1cb7bb2af832d7d0d8809225e0124"
+  integrity sha512-1RINmQKAItO6ISxYgPwszQE1BrsVU5aB45ho6O42mu96UiZBxEXsuQ7cJW4zs4CEodPUioj/QrXW1r9pLUM74A==
+
+lightningcss-linux-arm-gnueabihf@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-linux-arm-gnueabihf/-/lightningcss-linux-arm-gnueabihf-1.31.1.tgz#c3cad5ae8b70045f21600dc95295ab6166acf57e"
+  integrity sha512-OOCm2//MZJ87CdDK62rZIu+aw9gBv4azMJuA8/KB74wmfS3lnC4yoPHm0uXZ/dvNNHmnZnB8XLAZzObeG0nS1g==
+
+lightningcss-linux-arm64-gnu@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-linux-arm64-gnu/-/lightningcss-linux-arm64-gnu-1.31.1.tgz#a5c4f6a5ac77447093f61b209c0bd7fef1f0a3e3"
+  integrity sha512-WKyLWztD71rTnou4xAD5kQT+982wvca7E6QoLpoawZ1gP9JM0GJj4Tp5jMUh9B3AitHbRZ2/H3W5xQmdEOUlLg==
+
+lightningcss-linux-arm64-musl@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-linux-arm64-musl/-/lightningcss-linux-arm64-musl-1.31.1.tgz#af26ab8f829b727ada0a200938a6c8796ff36900"
+  integrity sha512-mVZ7Pg2zIbe3XlNbZJdjs86YViQFoJSpc41CbVmKBPiGmC4YrfeOyz65ms2qpAobVd7WQsbW4PdsSJEMymyIMg==
+
+lightningcss-linux-x64-gnu@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-linux-x64-gnu/-/lightningcss-linux-x64-gnu-1.31.1.tgz#a891d44e84b71c0d88959feb9a7522bbf61450ee"
+  integrity sha512-xGlFWRMl+0KvUhgySdIaReQdB4FNudfUTARn7q0hh/V67PVGCs3ADFjw+6++kG1RNd0zdGRlEKa+T13/tQjPMA==
+
+lightningcss-linux-x64-musl@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-linux-x64-musl/-/lightningcss-linux-x64-musl-1.31.1.tgz#8c8b21def851f4d477fa897b80cb3db2b650bc6e"
+  integrity sha512-eowF8PrKHw9LpoZii5tdZwnBcYDxRw2rRCyvAXLi34iyeYfqCQNA9rmUM0ce62NlPhCvof1+9ivRaTY6pSKDaA==
+
+lightningcss-win32-arm64-msvc@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-win32-arm64-msvc/-/lightningcss-win32-arm64-msvc-1.31.1.tgz#79000fb8c57e94a91b8fc643e74d5a54407d7080"
+  integrity sha512-aJReEbSEQzx1uBlQizAOBSjcmr9dCdL3XuC/6HLXAxmtErsj2ICo5yYggg1qOODQMtnjNQv2UHb9NpOuFtYe4w==
+
+lightningcss-win32-x64-msvc@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss-win32-x64-msvc/-/lightningcss-win32-x64-msvc-1.31.1.tgz#7f025274c81c7d659829731e09c8b6f442209837"
+  integrity sha512-I9aiFrbd7oYHwlnQDqr1Roz+fTz61oDDJX7n9tYF9FJymH1cIN1DtKw3iYt6b8WZgEjoNwVSncwF4wx/ZedMhw==
+
+lightningcss@1.31.1:
+  version "1.31.1"
+  resolved "https://registry.yarnpkg.com/lightningcss/-/lightningcss-1.31.1.tgz#1a19dd327b547a7eda1d5c296ebe1e72df5a184b"
+  integrity sha512-l51N2r93WmGUye3WuFoN5k10zyvrVs0qfKBhyC5ogUQ6Ew6JUSswh78mbSO+IU3nTWsyOArqPCcShdQSadghBQ==
+  dependencies:
+    detect-libc "^2.0.3"
+  optionalDependencies:
+    lightningcss-android-arm64 "1.31.1"
+    lightningcss-darwin-arm64 "1.31.1"
+    lightningcss-darwin-x64 "1.31.1"
+    lightningcss-freebsd-x64 "1.31.1"
+    lightningcss-linux-arm-gnueabihf "1.31.1"
+    lightningcss-linux-arm64-gnu "1.31.1"
+    lightningcss-linux-arm64-musl "1.31.1"
+    lightningcss-linux-x64-gnu "1.31.1"
+    lightningcss-linux-x64-musl "1.31.1"
+    lightningcss-win32-arm64-msvc "1.31.1"
+    lightningcss-win32-x64-msvc "1.31.1"
+
 lilconfig@^3.1.1, lilconfig@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/lilconfig/-/lilconfig-3.1.3.tgz#a1bcfd6257f9585bf5ae14ceeebb7b559025e4c4"
@@ -32375,7 +32530,7 @@ tape@5.9.0:
     resolve "^2.0.0-next.5"
     string.prototype.trim "^1.2.9"
 
-tar-fs@^3.1.1:
+tar-fs@3.1.1, tar-fs@^3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/tar-fs/-/tar-fs-3.1.1.tgz#4f164e59fb60f103d472360731e8c6bb4a7fe9ef"
   integrity sha512-LZA0oaPOc2fVo82Txf3gw+AkEd38szODlptMYejQUhndHMLQ9M059uXR+AfS7DNo0NpINvSqDsvyaCrBVkptWg==