diff --git a/common/util/json.go b/common/util/json.go
deleted file mode 100644
index 2be1df7..0000000
--- a/common/util/json.go
+++ /dev/null
@@ -1,81 +0,0 @@
-package util
-
-import (
-	"fmt"
-
-	"github.com/gogf/gf/v2/encoding/gjson"
-	"github.com/gogf/gf/v2/util/gconv"
-)
-
-// MergeConsult 将 consult 附件合并到模型生成的 messages 结构中
-func MergeConsult(req map[string]any, messages map[string]any, extendMapping map[string]any) map[string]any {
-	if len(req) == 0 || len(messages) == 0 || len(extendMapping) == 0 {
-		return messages
-	}
-
-	consult := gconv.Interfaces(req["consult"])
-	if len(consult) == 0 {
-		return messages
-	}
-
-	targetPath := gconv.String(extendMapping["target_content_path"])
-	templates := gconv.Map(extendMapping["attachment_templates"])
-	if targetPath == "" || len(templates) == 0 {
-		return messages
-	}
-
-	msgJson := gjson.New(messages)
-
-	// rounds 路径修正
-	if !msgJson.Get("rounds.0").IsNil() {
-		targetPath = "rounds.0." + targetPath
-	}
-
-	// 遍历追加
-	for _, item := range consult {
-		itemJson := gjson.New(item)
-		itemType := itemJson.Get("type").String()
-		tmpl := gconv.Map(templates[itemType])
-		if itemType == "" || len(tmpl) == 0 {
-			continue
-		}
-
-		attachment := buildAttachment(tmpl, itemJson.Get("url").String())
-		if attachment == nil {
-			continue
-		}
-
-		idx := len(msgJson.Get(targetPath).Array())
-		_ = msgJson.Set(fmt.Sprintf("%s.%d", targetPath, idx), attachment)
-	}
-
-	return msgJson.Map()
-}
-
-func buildAttachment(tmpl map[string]any, url string) map[string]any {
-	typ := gconv.String(tmpl["type"])
-	if typ == "" || url == "" {
-		return nil
-	}
-
-	body := gconv.Map(tmpl["body"])
-	fillEmptyInPlace(body, url)
-
-	return map[string]any{
-		"type": typ,
-		typ:    body,
-	}
-}
-
-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)
-		}
-	}
-}
diff --git a/common/util/mapping.go b/common/util/mapping.go
index b8ade11..a752c47 100644
--- a/common/util/mapping.go
+++ b/common/util/mapping.go
@@ -1,13 +1,16 @@
 package util
 
 import (
+	"fmt"
 	"strings"
 
 	"github.com/gogf/gf/v2/encoding/gjson"
 	"github.com/gogf/gf/v2/util/gconv"
 )
 
-// ReverseMap 映射 payload 到 mapping
+// ======================== 请求映射 ========================
+
+// ReverseMap 将 payload 按 mapping 路径映射为嵌套结构
 func ReverseMap(mapping map[string]any, payload map[string]any) map[string]any {
 	jsonObj := gjson.New("{}")
 	for path, defaultValue := range mapping {
@@ -21,6 +24,8 @@ func ReverseMap(mapping map[string]any, payload map[string]any) map[string]any {
 	return jsonObj.Map()
 }
 
+// ======================== 用户文本提取 ========================
+
 // ExtractUserText 从 messages 中提取所有 user 文本
 func ExtractUserText(messages map[string]any) map[string]any {
 	msgJson := gjson.New(messages)
@@ -29,6 +34,7 @@ func ExtractUserText(messages map[string]any) map[string]any {
 	if msgs.IsNil() {
 		msgs = msgJson.Get("messages")
 	}
+
 	var texts []string
 	for _, m := range msgs.Array() {
 		msg := gjson.New(m)
@@ -55,3 +61,128 @@ func ExtractUserText(messages map[string]any) map[string]any {
 		"content": strings.Join(texts, "\n"),
 	}
 }
+
+// ======================== 附件合并 ========================
+
+// MergeConsult 将 consult 附件合并到每个 round 的 content 数组中
+func MergeConsult(req map[string]any, messages map[string]any, extendMapping map[string]any) map[string]any {
+	if len(req) == 0 || len(messages) == 0 || len(extendMapping) == 0 {
+		return messages
+	}
+
+	consult := gconv.Interfaces(req["consult"])
+	if len(consult) == 0 {
+		return messages
+	}
+
+	targetPath := gconv.String(extendMapping["target_content_path"])
+	templates := gconv.Map(extendMapping["attachment_templates"])
+	if targetPath == "" || len(templates) == 0 {
+		return messages
+	}
+
+	msgJson := gjson.New(messages)
+
+	rounds := msgJson.Get("rounds").Array()
+	for i := range rounds {
+		roundPath := fmt.Sprintf("rounds.%d.%s", i, targetPath)
+		for _, item := range consult {
+			itemJson := gjson.New(item)
+			itemType := itemJson.Get("type").String()
+			tmpl := gconv.Map(templates[itemType])
+			if itemType == "" || len(tmpl) == 0 {
+				continue
+			}
+
+			attachment := buildAttachment(tmpl, itemJson.Get("url").String())
+			if attachment == nil {
+				continue
+			}
+
+			idx := len(msgJson.Get(roundPath).Array())
+			_ = msgJson.Set(fmt.Sprintf("%s.%d", roundPath, idx), attachment)
+		}
+	}
+
+	return msgJson.Map()
+}
+
+// buildAttachment 根据模板和 url 生成附件对象
+func buildAttachment(tmpl map[string]any, url string) map[string]any {
+	typ := gconv.String(tmpl["type"])
+	if typ == "" || url == "" {
+		return nil
+	}
+
+	body := gconv.Map(tmpl["body"])
+	fillEmptyInPlace(body, 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)
+		}
+	}
+}
+
+// ======================== 系统提示词合并 ========================
+
+// MergeSystemPrompt 将系统提示词和技能内容拼接到 system role 的 content 中
+func MergeSystemPrompt(messages map[string]any, prompt, skills string, requestMapping map[string]any) map[string]any {
+	var parts []string
+	if prompt != "" {
+		parts = append(parts, prompt)
+	}
+	if skills != "" {
+		parts = append(parts, skills)
+	}
+	if len(parts) == 0 {
+		return messages
+	}
+
+	systemContent := strings.Join(parts, "\n")
+	systemPath := getSystemPromptPath(requestMapping)
+	if systemPath == "" {
+		return messages
+	}
+
+	msgJson := gjson.New(messages)
+
+	existing := msgJson.Get(systemPath).String()
+	if existing != "" {
+		systemContent = existing + "\n" + systemContent
+	}
+	_ = msgJson.Set(systemPath, systemContent)
+
+	return msgJson.Map()
+}
+
+// getSystemPromptPath 从 RequestMapping 中提取 system content 的路径
+func getSystemPromptPath(requestMapping map[string]any) string {
+	for key, val := range requestMapping {
+		if !strings.Contains(key, ".role") {
+			continue
+		}
+		if gconv.String(val) != "system" {
+			continue
+		}
+		prefix := strings.TrimSuffix(key, ".role")
+		contentKey := prefix + ".content"
+		if _, ok := requestMapping[contentKey]; ok {
+			return contentKey
+		}
+	}
+	return ""
+}
diff --git a/service/prompt/prompt_build_service.go b/service/prompt/prompt_build_service.go
index 937d95b..284db31 100644
--- a/service/prompt/prompt_build_service.go
+++ b/service/prompt/prompt_build_service.go
@@ -20,7 +20,7 @@ func buildPromptTypeRequest(ctx context.Context, req *dto.ComposeMessagesReq, ai
 	//1) 构建系统提示词
 	systemPrompt := promptBuildWithRounds(ctx, chatModel, aiModel)
 	ir.AddSystem(systemPrompt)
-	userPrompt := buildUserPrompt(ctx, req, util.GetModelPrompt(ctx, aiModel.ModelType))
+	userPrompt := buildUserPrompt(ctx, req)
 	ir.AddUser(userPrompt)
 	//2) 检查整体内容是否超出窗口
 	if !checkOverallContent(ir, aiModel) {
@@ -40,7 +40,7 @@ func buildNodeTypeRequest(ctx context.Context, req *dto.ComposeMessagesReq, chat
 func buildStructTypeRequest(ctx context.Context, req *dto.ComposeMessagesReq, chatModel *gateway.AsynchModel, ir *IR) (map[string]any, error) {
 	customPrompt := gjson.New(req.UserForm).Get("0.prompt").String()
 	ir.AddSystem(customPrompt)
-	ir.AddUser(buildUserPrompt(ctx, req, ""))
+	ir.AddUser(buildUserPrompt(ctx, req))
 	return compileToProviderRequest(ctx, ir, chatModel, req, customPrompt)
 }
 
@@ -81,9 +81,14 @@ func promptBuildWithRounds(ctx context.Context, chatModel *gateway.AsynchModel,
 	if err != nil || providerProtocol == nil {
 		return ""
 	}
-	outputJSON := gjson.New(util.ReverseMap(aiModel.RequestMapping, map[string]any{})).MustToJsonString()
 
-	return fmt.Sprintf(providerProtocol.SystemPromptTemplate, outputJSON)
+	outputJSON := gjson.New(util.ReverseMap(aiModel.RequestMapping, map[string]any{
+		"model": aiModel.ModelName,
+	})).MustToJsonString()
+
+	return fmt.Sprintf(providerProtocol.SystemPromptTemplate,
+		outputJSON, //%s【输出结构】
+	)
 }
 
 // checkOverallContent 检查整体内容是否超出窗口
@@ -93,15 +98,8 @@ func checkOverallContent(ir *IR, model *gateway.AsynchModel) bool {
 }
 
 // buildUserPrompt 构建用户提示词
-func buildUserPrompt(ctx context.Context, req *dto.ComposeMessagesReq, prompt string) string {
+func buildUserPrompt(ctx context.Context, req *dto.ComposeMessagesReq) string {
 	var b strings.Builder
-	b.WriteString(fmt.Sprintf("目标模型：%s\n", req.ModelName))
-	if prompt != "" {
-		b.WriteString(fmt.Sprintf("系统提示词：%s\n", prompt))
-	}
-	if skills := SkillMdContent(ctx, req.SkillName); skills != "" {
-		b.WriteString(fmt.Sprintf("技能内容：\n%s\n", skills))
-	}
 	if formText := buildUserFormText(req.Form); formText != "" {
 		b.WriteString(fmt.Sprintf("系统参数：\n%s\n", formText))
 	}
diff --git a/service/prompt/prompt_compose_service.go b/service/prompt/prompt_compose_service.go
index f2028f9..43f852c 100644
--- a/service/prompt/prompt_compose_service.go
+++ b/service/prompt/prompt_compose_service.go
@@ -232,15 +232,19 @@ func handleCallbackSuccess(ctx context.Context, req *dto.CallbackReq, composeTas
 			})
 		}
 	}
+	// 4) 合并系统提示词
+	systemPrompt := util.GetModelPrompt(ctx, model.ModelType)
+	skillContent := SkillMdContent(ctx, composeTask.SkillName)
+	messages = util.MergeSystemPrompt(messages, systemPrompt, skillContent, model.RequestMapping)
 
-	// 4) 合并附加结构
+	// 5) 合并附加结构
 	messages = util.MergeConsult(composeTask.RequestPayload, messages, model.ExtendMapping)
-	// 5) 注入历史
+	// 6) 注入历史
 	if len(history) > 0 {
 		messages = InjectHistory(messages, history, protocol)
 	}
 
-	// 6) 更新数据库
+	// 7) 更新数据库
 	_, err = dao.ComposeTask.Update(ctx, &entity.ComposeTask{
 		TaskId:       req.TaskId,
 		Status:       public.ComposeStatusSuccess,