Reset messages in state when using MemorySaver()

[Louva1]

Hi, I am working building a chatbot. For each question-answer I call multiple agents and these messages get stored in my state:

class ChatbotState(TypedDict):
    chat_history: Annotated[Sequence[BaseMessage], add]
    input_user: str
    documents: str
    messages: Annotated[Sequence[BaseMessage], add]

I am using MemorySaver() to make sure that I can save my chat_history in my state when invoking the chatbot with a follow-up question. However, when I do this, I want to reset everything in my state except the chat_history, such that my agents do not get confused with information from the previous run. I know that I can simply add a node at the beginning to overwrite input_user and documents with an empty string, but how do I reset the messages to an empty list?

Or, is there a way how I can make use of two separate states, where one is saved into memory and the other just exists during each invoke?