From 49777d565265424726af6b653adc99b592dbfd9b Mon Sep 17 00:00:00 2001
From: PapacyDai <daidi88@sina.com>
Date: Thu, 29 May 2025 15:15:52 +0800
Subject: [PATCH] fix: Ensure _meta object is not lost when onprogress option
 is passed

When the onprogress option is passed, the _meta object in the request
params was being overwritten, causing any existing _meta content to be lost.
---
 src/shared/protocol.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/shared/protocol.ts b/src/shared/protocol.ts
index 4694929d..98f8e1c9 100644
--- a/src/shared/protocol.ts
+++ b/src/shared/protocol.ts
@@ -541,7 +541,10 @@ export abstract class Protocol<
         this._progressHandlers.set(messageId, options.onprogress);
         jsonrpcRequest.params = {
           ...request.params,
-          _meta: { progressToken: messageId },
+          _meta: {
+            ...(request.params._meta || {}),
+            progressToken: messageId
+          },
         };
       }