Class BufferWindowMemory

Class for managing and storing previous chat messages. It extends the BaseChatMemory class and implements the BufferWindowMemoryInput interface. This class is stateful and stores messages in a buffer. When called in a chain, it returns all of the messages it has stored.

Example

const prompt =
  PromptTemplate.fromTemplate(`The following is a friendly conversation between a human and an AI. The AI is talkative and provides lots of specific details from its context. If the AI does not know the answer to a question, it truthfully says it does not know.

    Current conversation:
    {chat_history}
    Human: {input}
    AI:`);

const chain = new LLMChain({
  llm: new ChatOpenAI({ temperature: 0.9 }),
  prompt,
  memory: new BufferWindowMemory({ memoryKey: "chat_history", k: 1 }),
});

// Example of initiating a conversation with the AI
const res1 = await chain.call({ input: "Hi! I'm Jim." });
console.log({ res1 });

// Example of following up with another question
const res2 = await chain.call({ input: "What's my name?" });
console.log({ res2 });
Copy