Struct WindowExpander 

pub struct WindowExpander { /* private fields */ }

Expands retrieval hits into bounded context windows.

Given a set of top-k hits from retrieval, expands each hit into a window of surrounding steps to preserve temporal context.

Implementations

impl WindowExpander

pub fn new(config: WindowConfig) -> Self

Create a new window expander with given configuration.

pub fn default_config() -> Self

Create a window expander with default configuration.

pub fn expand( &self, hits: &[RetrievalHit], episode_step_counts: &[(Uuid, usize)], ) -> WindowExpansionResult

Expand retrieval hits into context windows.

For each hit, compute a window of steps around it based on the configuration. Returns bounded windows that preserve context.

pub fn expand_with_context( &self, hits: &[RetrievalHit], episode_data: &[(Uuid, usize, String)], ) -> WindowExpansionResult

Expand hits with episode context included.

Requires episode descriptions to be provided for context.

pub fn config(&self) -> &WindowConfig

Get the configuration for this expander.

pub fn estimate_token_savings( &self, full_episode_steps: usize, window_size: usize, ) -> f32

Estimate the token savings from window-based retrieval.

Returns the estimated reduction in tokens compared to returning full episodes.