Add error handling for empty system prompt in litellm_ai_handler and type conversion in utils.py

pr_agent/algo/ai_handlers/litellm_ai_handler.py

@@ -106,6 +106,10 @@ class LiteLLMAIHandler(BaseAiHandler):
             deployment_id = self.deployment_id
             if self.azure:
                 model = 'azure/' + model
+            if 'claude' in model and not system:
+                system = "\n"
+                get_logger().warning(
+                    "Empty system prompt for claude model. Adding a newline character to prevent OpenAI API error.")
             messages = [{"role": "system", "content": system}, {"role": "user", "content": user}]
             if img_path:
                 try:

pr_agent/algo/utils.py

@@ -147,7 +147,7 @@ def convert_to_markdown_v2(output_data: dict,
             else:
                 markdown_text += f"### {emoji} {key_nice}: {value}\n\n"
         elif 'relevant tests' in key_nice.lower():
-            value = value.strip().lower()
+            value = str(value).strip().lower()
             if gfm_supported:
                 markdown_text += f"<tr><td>"
                 if is_value_no(value):