refactor: Split summarize method and add model metadata handling

aider/sendchat.py

@@ -5,6 +5,7 @@ import time
 from aider.dump import dump  # noqa: F401
 from aider.exceptions import LiteLLMExceptions
 from aider.llm import litellm
+from aider.utils import format_messages
 
 # from diskcache import Cache
 
@@ -30,7 +31,9 @@ def sanity_check_messages(messages):
             continue
 
         if last_role and role == last_role:
-            return False
+            print(format_messages(messages))
+            # import sys ; sys.exit()
+            raise ValueError("Messages don't properly alternate user/assistant")
 
         last_role = role
         last_non_system_role = role
@@ -47,6 +50,8 @@ def send_completion(
     temperature=0,
     extra_params=None,
 ):
+    # sanity_check_messages(messages)
+
     kwargs = dict(
         model=model_name,
         messages=messages,