Add extracted source directory and README navigation

extracted-source/node_modules/@modelcontextprotocol/sdk/dist/esm/server/stdio.js

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+import process from 'node:process';
+import { ReadBuffer, serializeMessage } from '../shared/stdio.js';
+/**
+ * Server transport for stdio: this communicates with an MCP client by reading from the current process' stdin and writing to stdout.
+ *
+ * This transport is only available in Node.js environments.
+ */
+export class StdioServerTransport {
+    constructor(_stdin = process.stdin, _stdout = process.stdout) {
+        this._stdin = _stdin;
+        this._stdout = _stdout;
+        this._readBuffer = new ReadBuffer();
+        this._started = false;
+        // Arrow functions to bind `this` properly, while maintaining function identity.
+        this._ondata = (chunk) => {
+            this._readBuffer.append(chunk);
+            this.processReadBuffer();
+        };
+        this._onerror = (error) => {
+            this.onerror?.(error);
+        };
+    }
+    /**
+     * Starts listening for messages on stdin.
+     */
+    async start() {
+        if (this._started) {
+            throw new Error('StdioServerTransport already started! If using Server class, note that connect() calls start() automatically.');
+        }
+        this._started = true;
+        this._stdin.on('data', this._ondata);
+        this._stdin.on('error', this._onerror);
+    }
+    processReadBuffer() {
+        while (true) {
+            try {
+                const message = this._readBuffer.readMessage();
+                if (message === null) {
+                    break;
+                }
+                this.onmessage?.(message);
+            }
+            catch (error) {
+                this.onerror?.(error);
+            }
+        }
+    }
+    async close() {
+        // Remove our event listeners first
+        this._stdin.off('data', this._ondata);
+        this._stdin.off('error', this._onerror);
+        // Check if we were the only data listener
+        const remainingDataListeners = this._stdin.listenerCount('data');
+        if (remainingDataListeners === 0) {
+            // Only pause stdin if we were the only listener
+            // This prevents interfering with other parts of the application that might be using stdin
+            this._stdin.pause();
+        }
+        // Clear the buffer and notify closure
+        this._readBuffer.clear();
+        this.onclose?.();
+    }
+    send(message) {
+        return new Promise(resolve => {
+            const json = serializeMessage(message);
+            if (this._stdout.write(json)) {
+                resolve();
+            }
+            else {
+                this._stdout.once('drain', resolve);
+            }
+        });
+    }
+}
+//# sourceMappingURL=stdio.js.map