Update app.py

app.py

@@ -98,8 +98,13 @@ refine_problem_prompt = """You are an expert consultant specializing in enhancin
    - Suggest innovative directions without fully solving the problem
 
 # Output Format:
-Return the results in JSON format with no additional text:
-
+Return the results in **strictly valid JSON** format with no additional text. 
+All string values (especially multiline descriptions) must:
+- Be enclosed in double quotes
+- Escape internal double quotes with backslashes (e.g., \")
+- Replace newline characters with "\\n" (double backslash-n for JSON)
+- Avoid unescaped Markdown if it breaks JSON syntax
+Reference json:
 {
     "refined_problem_1": {
         "title": "Brief descriptive title for the first refined problem",