diff --git a/common/util/mapping.go b/common/util/mapping.go
index 821e183..11be623 100644
--- a/common/util/mapping.go
+++ b/common/util/mapping.go
@@ -1,6 +1,7 @@
 package util
 
 import (
+	"encoding/json"
 	"fmt"
 	"strings"
 
@@ -114,27 +115,16 @@ func buildAttachment(tmpl map[string]any, url string) map[string]any {
 		return nil
 	}
 
-	body := gconv.Map(tmpl["body"])
-	fillEmptyInPlace(body, url)
+	// 深拷贝模板
+	b, _ := json.Marshal(tmpl)
+	str := string(b)
+	str = strings.ReplaceAll(str, `"{{url}}"`, `"`+url+`"`)
 
-	return map[string]any{
-		"type": typ,
-		typ:    body,
-	}
-}
-
-// fillEmptyInPlace 递归填充空字符串
-func fillEmptyInPlace(m map[string]any, value string) {
-	for k, v := range m {
-		switch vv := v.(type) {
-		case string:
-			if vv == "" {
-				m[k] = value
-			}
-		case map[string]any:
-			fillEmptyInPlace(vv, value)
-		}
-	}
+	var result map[string]any
+	_ = json.Unmarshal([]byte(str), &result)
+	delete(result, "type")
+	result["type"] = typ
+	return result
 }
 
 // ======================== 系统提示词合并 ========================
diff --git a/service/prompt/prompt_compose_service.go b/service/prompt/prompt_compose_service.go
index 2cc196e..6a43411 100644
--- a/service/prompt/prompt_compose_service.go
+++ b/service/prompt/prompt_compose_service.go
@@ -129,8 +129,7 @@ func handleBuild(ctx context.Context, req *dto.ComposeMessagesReq, chatModel, ai
 
 // Callback 回调处理
 func Callback(ctx context.Context, req *dto.CallbackReq) error {
-	g.Log().Infof(ctx, "[开始回调处理] taskId=%s state=%d", req.TaskId, req.State)
-
+	g.Log().Infof(ctx, "[开始回调处理] taskId=%s state=%d ossFile=%s", req.TaskId, req.State, req.OssFile)
 	// 1) 查询任务
 	composeTask, err := dao.ComposeTask.Get(ctx, &entity.ComposeTask{TaskId: req.TaskId})
 	if err != nil {
@@ -154,7 +153,7 @@ func Callback(ctx context.Context, req *dto.CallbackReq) error {
 	// 3) 解析 OSS 内容为消息
 	var messages map[string]any
 	if len(ossContent) > 0 {
-		if err := json.Unmarshal(ossContent, &messages); err != nil {
+		if err = json.Unmarshal(ossContent, &messages); err != nil {
 			g.Log().Warningf(ctx, "[回调处理] 解析OSS内容失败 taskId=%s err=%v", req.TaskId, err)
 		}
 	}
@@ -240,6 +239,9 @@ func handleCallbackSuccess(ctx context.Context, req *dto.CallbackReq, composeTas
 	userPrompt := composeTask.RequestPayload["userPrompt"].(string)
 	messages = util.MergeSystemPrompt(messages, systemPrompt, skillContent, userPrompt, model.RequestMapping)
 
+	fmt.Println("打印1", composeTask.RequestPayload)
+	fmt.Println("打印2", messages)
+	fmt.Println("打印3", model.ExtendMapping)
 	// 5) 合并附加结构
 	messages = util.MergeConsult(composeTask.RequestPayload, messages, model.ExtendMapping)
 	// 6) 注入历史