Implement MCP 2026-07-28 (#2286)

Co-authored-by: Matt <77928207+mattzcarey@users.noreply.github.com>
Co-authored-by: Konstantin Konstantinov <KKonstantinov@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

examples/parallel-calls/server.ts

@@ -0,0 +1,49 @@
+/**
+ * One notification-emitting tool that the parallel-calls client drives with
+ * multiple concurrent clients (HTTP) or one client / multiple concurrent
+ * calls (both transports), asserting in-flight notifications are attributed
+ * back to the right caller. One binary, either transport.
+ */
+import { createServer } from 'node:http';
+
+import { parseExampleArgs } from '@mcp-examples/shared';
+import { toNodeHandler } from '@modelcontextprotocol/node';
+import { createMcpHandler, McpServer } from '@modelcontextprotocol/server';
+import { serveStdio } from '@modelcontextprotocol/server/stdio';
+import * as z from 'zod/v4';
+
+function buildServer(): McpServer {
+    const server = new McpServer({ name: 'parallel-calls-example', version: '1.0.0' }, { capabilities: { logging: {} } });
+    server.registerTool(
+        'start-notification-stream',
+        {
+            description: 'Sends a few periodic logging notifications tagged with the caller id',
+            inputSchema: z.object({ caller: z.string(), count: z.number().int().min(1).max(20).default(3) })
+        },
+        async ({ caller, count }, ctx) => {
+            for (let i = 1; i <= count; i++) {
+                // Send as a request-tied notification so it rides the same SSE
+                // stream as the eventual result.
+                await ctx.mcpReq.notify({
+                    method: 'notifications/message',
+                    params: { level: 'info', data: `[${caller}] tick ${i}/${count}` }
+                });
+                await new Promise(r => setTimeout(r, 20));
+            }
+            return { content: [{ type: 'text', text: `[${caller}] done (${count})` }] };
+        }
+    );
+    return server;
+}
+
+const { transport, port } = parseExampleArgs();
+
+if (transport === 'stdio') {
+    void serveStdio(buildServer);
+    console.error('[server] serving over stdio');
+} else {
+    const handler = createMcpHandler(buildServer);
+    createServer(toNodeHandler(handler)).listen(port, () => {
+        console.error(`[server] listening on http://127.0.0.1:${port}/mcp`);
+    });
+}