From d706d8a8ebfedcd87d3a15ac9cde2ee04e55b36f Mon Sep 17 00:00:00 2001
From: Oleksii Kurinnyi <okurinny@redhat.com>
Date: Fri, 10 Jul 2026 16:30:56 +0300
Subject: [PATCH] fix: clear stale mcp-session-id on 404 response

When the server returns 404 (session not found), reset sessionId
so subsequent requests don't keep sending the rejected session header.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Oleksii Kurinnyi <okurinny@redhat.com>
---
 stdio-bridge.cjs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stdio-bridge.cjs b/stdio-bridge.cjs
index 8906171..38fb910 100755
--- a/stdio-bridge.cjs
+++ b/stdio-bridge.cjs
@@ -116,6 +116,7 @@ function forwardRequest(message) {
       timeout: REQUEST_TIMEOUT_MS,
     }, function (res) {
       if (res.headers['mcp-session-id']) sessionId = res.headers['mcp-session-id'];
+      if (res.statusCode === 404) sessionId = null;
       var ct = res.headers['content-type'] || '';
 
       if (ct.indexOf('text/event-stream') !== -1) {