From 3eff8b5c3a0118dab5227e4d1cffec21eef124dd Mon Sep 17 00:00:00 2001
From: mlogclub <mlog1@qq.com>
Date: Sat, 2 May 2026 14:51:39 +0800
Subject: [PATCH] fix: simplify fallback reply handling in knowledge guard

---
 internal/ai/runtime/executor/knowledge_guard.go | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/internal/ai/runtime/executor/knowledge_guard.go b/internal/ai/runtime/executor/knowledge_guard.go
index 9c83de7..47140b6 100644
--- a/internal/ai/runtime/executor/knowledge_guard.go
+++ b/internal/ai/runtime/executor/knowledge_guard.go
@@ -8,6 +8,7 @@ import (
 	"cs-agent/internal/pkg/enums"
 
 	"github.com/cloudwego/eino/schema"
+	"github.com/mlogclub/simple/common/strs"
 )
 
 type knowledgeGuardDecision struct {
@@ -53,14 +54,10 @@ func resolveKnowledgeFallbackReply(aiAgent models.AIAgent) string {
 
 func resolveKnowledgeHumanSupportFallback(aiAgent models.AIAgent) string {
 	base := strings.TrimSpace(resolveKnowledgeFallbackReply(aiAgent))
-	if base == "" {
+	if strs.IsBlank(base) {
 		base = "当前知识库暂无明确信息。"
 	}
-	suggestion := "建议你联系人工客服进一步确认。"
-	if strings.Contains(base, suggestion) {
-		return base
-	}
-	return strings.TrimSpace(base + " " + suggestion)
+	return base
 }
 
 func buildKnowledgeRuntimeInstruction(answerMode enums.KnowledgeAnswerMode, fallbackReply string) string {