Struct TokenWindowMemory 

pub struct TokenWindowMemory { /* private fields */ }

A MemoryPolicy that retains the most recent messages up to a token budget.

Messages are walked from newest to oldest, accumulating token counts produced by a TokenCounter. Once including a message would exceed max_tokens, the walk stops and the included messages are returned in original (oldest-first) order. As with SlidingWindowMemory, a leading orphan tool-result is dropped when its paired assistant tool call has been truncated.

Implementations

impl TokenWindowMemory

pub fn new<C>(max_tokens: usize, counter: C) -> Self

where C: TokenCounter + 'static,

Create a new policy with a token budget and a counter.

Trait Implementations

impl Debug for TokenWindowMemory

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl MemoryPolicy for TokenWindowMemory

fn apply(&self, messages: Vec<Message>) -> Result<Vec<Message>, MemoryError>

Transform messages into the history that should be returned to the agent. This is the required method — every policy must implement it.

fn apply_with_demoted( &self, messages: Vec<Message>, ) -> Result<(Vec<Message>, Vec<Message>), MemoryError>

Transform messages and report which messages were demoted (excluded from the returned history).