claude code tools error

server/internal/proxy/convert/json_responses.go

@@ -305,8 +305,11 @@ func responsesToChatResp(body []byte) ([]byte, error) {
 		msg["tool_calls"] = toolCalls
 	}
 	finish := "stop"
-	if string(rawJSON(m, "status")) == `"incomplete"` {
-		finish = "length"
+	switch {
+	case string(rawJSON(m, "status")) == `"incomplete"`:
+		finish = "length" // 截断优先，客户端可据此区分
+	case len(toolCalls) > 0:
+		finish = "tool_calls" // 有工具调用时映射 tool_calls，否则中转后 stop_reason 成 end_turn
 	}
 	var prompt, completion int64
 	if u := rawJSON(m, "usage"); u != nil {