refactor: bundle modelcontextprotocol-sdk

Author: Piotr Paulski

scripts/post-build.ts

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+import { execSync } from 'node:child_process';
 import * as fs from 'node:fs';
 import * as path from 'node:path';
 
@@ -59,6 +60,10 @@ function copyThirdPartyLicenseFiles() {
   }
 }
 
+async function bundle(path: string): Promise<void> {
+  execSync(`npx esbuild ${path} --bundle --outfile=${path} --platform=node --allow-overwrite --target=es2022 --format=esm`);
+}
+
 function main(): void {
   const devtoolsThirdPartyPath =
     'node_modules/chrome-devtools-frontend/front_end/third_party';
@@ -183,6 +188,8 @@ export const hostConfig = {};
   fs.copyFileSync(devtoolsLicenseFileSource, devtoolsLicenseFileDestination);
 
   copyThirdPartyLicenseFiles();
+
+  bundle('./build/src/third_party/modelcontextprotocol-sdk/index.js');
 }
 
 main();

src/McpResponse.ts

@@ -3,10 +3,6 @@
  * Copyright 2025 Google LLC
  * SPDX-License-Identifier: Apache-2.0
  */
-import type {
-  ImageContent,
-  TextContent,
-} from '@modelcontextprotocol/sdk/types.js';
 import type {ConsoleMessage, ResourceType} from 'puppeteer-core';
 
 import {formatConsoleEvent} from './formatters/consoleFormatter.js';
@@ -19,6 +15,10 @@ import {
 } from './formatters/networkFormatter.js';
 import {formatA11ySnapshot} from './formatters/snapshotFormatter.js';
 import type {McpContext} from './McpContext.js';
+import type {
+  ImageContent,
+  TextContent,
+} from './third_party/modelcontextprotocol-sdk/index.js';
 import {handleDialog} from './tools/pages.js';
 import type {ImageContentData, Response} from './tools/ToolDefinition.js';
 import {paginate, type PaginationOptions} from './utils/pagination.js';

src/main.ts

@@ -6,18 +6,14 @@
 
 import './polyfill.js';
 
-import {McpServer} from '@modelcontextprotocol/sdk/server/mcp.js';
-import {StdioServerTransport} from '@modelcontextprotocol/sdk/server/stdio.js';
-import type {CallToolResult} from '@modelcontextprotocol/sdk/types.js';
-import {SetLevelRequestSchema} from '@modelcontextprotocol/sdk/types.js';
-
 import type {Channel} from './browser.js';
 import {ensureBrowserConnected, ensureBrowserLaunched} from './browser.js';
 import {parseArguments} from './cli.js';
 import {logger, saveLogsToFile} from './logger.js';
 import {McpContext} from './McpContext.js';
 import {McpResponse} from './McpResponse.js';
 import {Mutex} from './Mutex.js';
+import {McpServer,StdioServerTransport,type CallToolResult,SetLevelRequestSchema} from './third_party/modelcontextprotocol-sdk/index.js';
 import * as consoleTools from './tools/console.js';
 import * as emulationTools from './tools/emulation.js';
 import * as inputTools from './tools/input.js';

src/third_party/modelcontextprotocol-sdk/index.ts

@@ -0,0 +1,14 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export {McpServer} from '@modelcontextprotocol/sdk/server/mcp.js';
+export {StdioServerTransport} from '@modelcontextprotocol/sdk/server/stdio.js';
+export {
+  type CallToolResult,
+  SetLevelRequestSchema,
+  type ImageContent,
+  type TextContent,
+} from '@modelcontextprotocol/sdk/types.js';