From 10ff7a01c285bee482d3296a3a2b9937834b4af1 Mon Sep 17 00:00:00 2001
From: DrSmoothl <1787882683@qq.com>
Date: Sat, 14 Mar 2026 01:50:00 +0800
Subject: [PATCH] pylance fix

---
 src/plugin_runtime/protocol/codec.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/plugin_runtime/protocol/codec.py b/src/plugin_runtime/protocol/codec.py
index 83239348..87816456 100644
--- a/src/plugin_runtime/protocol/codec.py
+++ b/src/plugin_runtime/protocol/codec.py
@@ -28,7 +28,10 @@ class MsgPackCodec(Codec):
     """MsgPack 编解码器"""
 
     def encode(self, obj: Dict[str, Any]) -> bytes:
-        return msgpack.packb(obj, use_bin_type=True)
+        result = msgpack.packb(obj, use_bin_type=True)
+        if result is None:
+            raise ValueError("msgpack.packb returned None, expected bytes")
+        return result
 
     def decode(self, data: bytes) -> Dict[str, Any]:
         result = msgpack.unpackb(data, raw=False)