From d38d4d2d26b1e97ecf919710d8468f7acfd21c39 Mon Sep 17 00:00:00 2001
From: DBT <nvue.dev@gmail.com>
Date: Thu, 26 Feb 2026 14:15:44 +0000
Subject: [PATCH] agent: add non-empty fallback when model returns empty final
 content

---
 pkg/agent/loop.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index 612b828..f29b2ae 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -690,8 +690,12 @@ func (al *AgentLoop) processMessage(ctx context.Context, msg bus.InboundMessage)
 		}
 	}
 
-	if finalContent == "" {
-		finalContent = ""
+	if strings.TrimSpace(finalContent) == "" {
+		fallback := strings.TrimSpace(al.noResponseFallback)
+		if fallback == "" {
+			fallback = "在的，我刚刚这条回复丢了。请再说一次，我马上处理。"
+		}
+		finalContent = fallback
 	}
 
 	// Filter out <think>...</think> content from user-facing response