fix: enhanced structured output

api/core/llm_generator/llm_generator.py

@@ -654,7 +654,6 @@ class LLMGenerator:
         return f"""You are a code generator for Dify workflow automation.
 
 Generate {language} code to extract/transform available variables for the target parameter.
-If user is not talking about the code node, provide the existing data or blank data for user, following the schema.
 
 ## Target Parameter
 {parameter_block}
@@ -668,6 +667,7 @@ If user is not talking about the code node, provide the existing data or blank d
 - Respect target constraints (options/min/max/default/multiple) if provided.
 - If existing code is provided, adapt it instead of rewriting from scratch.
 - Return only JSON that matches the provided schema.
+- If user is not talking about the code node, provide blank code/outputs/variables for user, say to user in `message`.
 """
 
     @staticmethod

api/core/llm_generator/output_parser/structured_output.py

@@ -156,10 +156,10 @@ def invoke_llm_with_structured_output(
     else:
         # Priority 3: Prompt-based fallback
         _set_response_format(model_parameters_with_json_schema, model_schema.parameter_rules)
-        prompt_messages = _handle_prompt_based_schema(
-            prompt_messages=prompt_messages,
-            structured_output_schema=json_schema,
-        )
+    prompt_messages = _handle_prompt_based_schema(
+        prompt_messages=prompt_messages,
+        structured_output_schema=json_schema,
+    )
 
     llm_result = model_instance.invoke_llm(
         prompt_messages=list(prompt_messages),