Struct SlidingWindowSummarizer 

pub struct SlidingWindowSummarizer { /* private fields */ }

Keeps only the most recent window messages and silently discards everything older. No API call is made.

Use this when you want predictable, zero-cost context management and are comfortable with the model losing access to earlier turns.

Permanent Role::System messages are always preserved regardless of window.

Example

use ds_api::DeepseekAgent;
use ds_api::conversation::SlidingWindowSummarizer;

// Keep the last 20 non-system messages; trigger summarization above 30.
let agent = DeepseekAgent::new("sk-...")
    .with_summarizer(
        SlidingWindowSummarizer::new(20)
            .trigger_at(30)
    );

Implementations

impl SlidingWindowSummarizer

pub fn new(window: usize) -> Self

Create a summarizer that retains at most window non-system messages.

Summarization triggers as soon as the non-system message count exceeds window. Use trigger_at to set a larger trigger threshold so the window only slides after a certain amount of growth.

pub fn trigger_at(self, n: usize) -> Self

Builder: set the non-system message count that triggers summarization.

Must be greater than window; if set to a value ≤ window it is silently clamped to window + 1.

Example

use ds_api::conversation::SlidingWindowSummarizer;

// Retain 20 turns but only start trimming after reaching 40.
let s = SlidingWindowSummarizer::new(20).trigger_at(40);

Trait Implementations

impl Clone for SlidingWindowSummarizer

fn clone(&self) -> SlidingWindowSummarizer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SlidingWindowSummarizer

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

Formats the value using the given formatter.

impl Summarizer for SlidingWindowSummarizer

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

Return true if the history should be summarized before the next API turn.

fn summarize<'a>( &'a self, history: &'a mut Vec<Message>, ) -> Pin<Box<dyn Future<Output = Result<(), ApiError>> + Send + 'a>>

Compress history in-place, returning an error only for unrecoverable failures.