From 61ee1b9094ff077e94ec4c01f7d8f24e08930e82 Mon Sep 17 00:00:00 2001
From: Shua Chen <79824078+shua-chen@users.noreply.github.com>
Date: Fri, 12 Dec 2025 11:19:53 +0800
Subject: [PATCH] fix: truncate auto-populated description to prevent 400-char
 limit error (#28681)

---
 api/models/model.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/api/models/model.py b/api/models/model.py
index c8fbdc40ec..88cb945b3f 100644
--- a/api/models/model.py
+++ b/api/models/model.py
@@ -111,7 +111,11 @@ class App(Base):
         else:
             app_model_config = self.app_model_config
             if app_model_config:
-                return app_model_config.pre_prompt
+                pre_prompt = app_model_config.pre_prompt or ""
+                # Truncate to 200 characters with ellipsis if using prompt as description
+                if len(pre_prompt) > 200:
+                    return pre_prompt[:200] + "..."
+                return pre_prompt
             else:
                 return ""