Struct TokenBasedSummarizer 

pub struct TokenBasedSummarizer {
    pub threshold: usize,
    pub retain_last: usize,
    pub max_summary_chars: usize,
}

Default token-based summarizer:

• Estimates tokens roughly as total characters / 4
• Triggers when estimated tokens exceed threshold (default 100_000)
• Keeps retain_last most recent messages and summarizes the older ones into a single system message.
• The summary is a concatenation/truncation of older messages, not an LLM semantic summary.

Fields

threshold: usize

retain_last: usize

max_summary_chars: usize

Trait Implementations

impl Clone for TokenBasedSummarizer

fn clone(&self) -> TokenBasedSummarizer

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TokenBasedSummarizer

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

Formats the value using the given formatter.

impl Default for TokenBasedSummarizer

fn default() -> Self

Returns the “default value” for a type.

impl Summarizer for TokenBasedSummarizer

fn should_summarize(&self, history: &[Message]) -> bool

Return true if history should be summarized now.

fn summarize(&self, history: &mut Vec<Message>) -> Option<Message>

Perform summarization by mutating history. If a summary was created and applied, return Some(Message) representing the inserted summary message. If nothing was done, return None.