From 977690590e33c50eb489ec4a6e86b46e0f60a629 Mon Sep 17 00:00:00 2001
From: Bohan Feng <45181245+fengb3@users.noreply.github.com>
Date: Mon, 20 Oct 2025 18:39:20 +0800
Subject: [PATCH] fix: parameter extractor instructions placeholder not
 replaced (#26235) (#27135)

---
 .../nodes/parameter_extractor/parameter_extractor_node.py       | 2 +-
 api/core/workflow/nodes/parameter_extractor/prompts.py          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/api/core/workflow/nodes/parameter_extractor/parameter_extractor_node.py b/api/core/workflow/nodes/parameter_extractor/parameter_extractor_node.py
index 2b65cc30b6..e250650fef 100644
--- a/api/core/workflow/nodes/parameter_extractor/parameter_extractor_node.py
+++ b/api/core/workflow/nodes/parameter_extractor/parameter_extractor_node.py
@@ -747,7 +747,7 @@ class ParameterExtractorNode(Node):
         if model_mode == ModelMode.CHAT:
             system_prompt_messages = ChatModelMessage(
                 role=PromptMessageRole.SYSTEM,
-                text=CHAT_GENERATE_JSON_PROMPT.format(histories=memory_str).replace("{{instructions}}", instruction),
+                text=CHAT_GENERATE_JSON_PROMPT.format(histories=memory_str, instructions=instruction),
             )
             user_prompt_message = ChatModelMessage(role=PromptMessageRole.USER, text=input_text)
             return [system_prompt_messages, user_prompt_message]
diff --git a/api/core/workflow/nodes/parameter_extractor/prompts.py b/api/core/workflow/nodes/parameter_extractor/prompts.py
index b74be8f206..1b29be4418 100644
--- a/api/core/workflow/nodes/parameter_extractor/prompts.py
+++ b/api/core/workflow/nodes/parameter_extractor/prompts.py
@@ -135,7 +135,7 @@ Here are the chat histories between human and assistant, inside <histories></his
 ### Instructions:
 Some extra information are provided below, you should always follow the instructions as possible as you can.
 <instructions>
-{{instructions}}
+{instructions}
 </instructions>
 """