Struct ConversationSummaryBufferMemory 

pub struct ConversationSummaryBufferMemory<M: BaseChatModel> { /* private fields */ }

Conversation Summary Buffer Memory

Combines summary and full conversation:

• Keeps the last k rounds of full conversation (ensuring fluency)
• Summarizes older conversations (saving tokens)

Example

use lc_memory::ConversationSummaryBufferMemory;
use lc_providers::OpenAIChat;

let llm = OpenAIChat::new(config);
let memory = ConversationSummaryBufferMemory::new(llm, 5); // Keep last 5 rounds

// After 20 rounds:
// - First 15 rounds -> summary
// - Last 5 rounds -> full conversation

Implementations

impl<M: BaseChatModel> ConversationSummaryBufferMemory<M>

pub fn new(llm: M, max_token_limit: usize) -> Self

pub fn with_input_key(self, key: impl Into<String>) -> Self

pub fn with_output_key(self, key: impl Into<String>) -> Self

pub fn with_memory_key(self, key: impl Into<String>) -> Self

pub fn with_summary_prompt(self, prompt: impl Into<String>) -> Self

pub fn with_return_messages(self, return_messages: bool) -> Self

pub fn chat_memory(&self) -> &ChatMessageHistory

pub fn chat_memory_mut(&mut self) -> &mut ChatMessageHistory

pub fn max_token_limit(&self) -> usize

pub async fn buffer(&self) -> String

Trait Implementations

impl<M: BaseChatModel + Send + Sync + 'static> BaseMemory for ConversationSummaryBufferMemory<M>

where <M as Runnable<Vec<Message>, LLMResult>>::Error: Display,

fn memory_variables(&self) -> Vec<&str>

Get memory variable names

fn load_memory_variables<'life0, 'life1, 'async_trait>( &'life0 self, _inputs: &'life1 HashMap<String, String>, ) -> Pin<Box<dyn Future<Output = Result<HashMap<String, Value>, MemoryError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Load memory variables

fn save_context<'life0, 'life1, 'life2, 'async_trait>( &'life0 mut self, inputs: &'life1 HashMap<String, String>, outputs: &'life2 HashMap<String, String>, ) -> Pin<Box<dyn Future<Output = Result<(), MemoryError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Save context

fn clear<'life0, 'async_trait>( &'life0 mut self, ) -> Pin<Box<dyn Future<Output = Result<(), MemoryError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Clear memory