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Migrate to MCP SDK 2.0 with official Protocol and isolated role peers (#720)

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App and AppBridge extend the public Protocol from @modelcontextprotocol/client; the iframe wire protocol (ui/initialize only) is unchanged. Peers move to the split SDK 2.0 packages with client and server as optional role peers. Fixups (lockfile, peer ranges, restored handler guards, docs, wire-compat tests) follow in a separate PR.

Co-authored-by: Andrew Khadder <andrew@manufact.com>
Co-authored-by: Felix Weinberger <fweinberger@anthropic.com>
Closes #702
This commit is contained in:
Olivier Chafik 2026-09-08 12:44:49 +01:00 • committed by GitHub
commit 1a713173cc
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GPG key ID: B5690EEEBB952194
4 changed files with 2415 additions and 1867 deletions
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10
examples/wiki-explorer-server/main.ts
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@ -4,10 +4,10 @@
* Or: node dist/index.js [--stdio]
*/
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { createMcpExpressApp } from "@modelcontextprotocol/sdk/server/express.js";
import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
import { StdioServerTransport } from "@modelcontextprotocol/server/stdio";
import { createMcpExpressApp } from "@modelcontextprotocol/express";
import type { McpServer } from "@modelcontextprotocol/server";
import { NodeStreamableHTTPServerTransport } from "@modelcontextprotocol/node";
import cors from "cors";
import type { Request, Response } from "express";
import { createServer } from "./server.js";
@ -27,7 +27,7 @@ export async function startStreamableHTTPServer(
app.all("/mcp", async (req: Request, res: Response) => {
const server = createServer();
const transport = new StreamableHTTPServerTransport({
const transport = new NodeStreamableHTTPServerTransport({
sessionIdGenerator: undefined,
});

5
examples/wiki-explorer-server/package.json
View file

@ -26,8 +26,11 @@
"serve": "bun --watch main.ts"
},
"dependencies": {
"@modelcontextprotocol/client": "2.0.0",
"@modelcontextprotocol/ext-apps": "^1.7.0",
"@modelcontextprotocol/sdk": "^1.29.0",
"@modelcontextprotocol/express": "2.0.0",
"@modelcontextprotocol/node": "2.0.0",
"@modelcontextprotocol/server": "2.0.0",
"cheerio": "^1.0.0",
"cors": "^2.8.5",
"express": "^5.1.0",

10
examples/wiki-explorer-server/server.ts
View file

@ -3,11 +3,11 @@ import {
registerAppResource,
registerAppTool,
} from "@modelcontextprotocol/ext-apps/server";
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import type {
CallToolResult,
ReadResourceResult,
} from "@modelcontextprotocol/sdk/types.js";
import {
McpServer,
type CallToolResult,
type ReadResourceResult,
} from "@modelcontextprotocol/server";
import * as cheerio from "cheerio";
import fs from "node:fs/promises";
import path from "node:path";

2
examples/wiki-explorer-server/src/mcp-app.ts
View file

@ -2,7 +2,7 @@
* Wiki Explorer - Force-directed graph visualization of Wikipedia link networks
*/
import { App, type McpUiHostContext } from "@modelcontextprotocol/ext-apps";
import type { CallToolResult } from "@modelcontextprotocol/sdk/types.js";
import type { CallToolResult } from "@modelcontextprotocol/client";
import { z } from "zod";
import {
forceCenter,