From 01460b0b4fecede8c8ab51789813bc730cb2c4d0 Mon Sep 17 00:00:00 2001
From: iberianpig <yhkyky@gmail.com>
Date: Tue, 13 May 2025 17:26:10 +0900
Subject: [PATCH] fix: force UTF-8 encoding for stdio streams

This change forces $stdin/$stdout to use UTF-8 encoding,
similar to PR 198 in the python-sdk.
https://github.com/modelcontextprotocol/python-sdk/pull/198

It addresses platform-dependent encoding issues.
---
 lib/model_context_protocol/transports/stdio.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/model_context_protocol/transports/stdio.rb b/lib/model_context_protocol/transports/stdio.rb
index 1c158d0f..f72508b4 100644
--- a/lib/model_context_protocol/transports/stdio.rb
+++ b/lib/model_context_protocol/transports/stdio.rb
@@ -9,6 +9,8 @@ class StdioTransport < Transport
       def initialize(server)
         @server = server
         @open = false
+        $stdin.set_encoding("UTF-8")
+        $stdout.set_encoding("UTF-8")
         super
       end