From a5006e2afbe8e6f55a4ee2a4888837fabca543ff Mon Sep 17 00:00:00 2001
From: however <however-yir@users.noreply.github.com>
Date: Mon, 18 Aug 2025 21:18:48 +0800
Subject: [PATCH] fix(client-stdio): force UTF-8 decoding in
 StdioClientTransport

---
 .../client/transport/StdioClientTransport.java                | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mcp-core/src/main/java/io/modelcontextprotocol/client/transport/StdioClientTransport.java b/mcp-core/src/main/java/io/modelcontextprotocol/client/transport/StdioClientTransport.java
index 1b4eaca97..d5fbb0cd8 100644
--- a/mcp-core/src/main/java/io/modelcontextprotocol/client/transport/StdioClientTransport.java
+++ b/mcp-core/src/main/java/io/modelcontextprotocol/client/transport/StdioClientTransport.java
@@ -180,7 +180,7 @@ public void awaitForExit() {
 	private void startErrorProcessing() {
 		this.errorScheduler.schedule(() -> {
 			try (BufferedReader processErrorReader = new BufferedReader(
-					new InputStreamReader(process.getErrorStream()))) {
+					new InputStreamReader(process.getErrorStream(), StandardCharsets.UTF_8))) {
 				String line;
 				while (!isClosing && (line = processErrorReader.readLine()) != null) {
 					try {
@@ -246,7 +246,7 @@ public Mono<Void> sendMessage(JSONRPCMessage message) {
 	 */
 	private void startInboundProcessing() {
 		this.inboundScheduler.schedule(() -> {
-			try (BufferedReader processReader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
+			try (BufferedReader processReader = new BufferedReader(new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8))) {
 				String line;
 				while (!isClosing && (line = processReader.readLine()) != null) {
 					try {