Struct Preview 

pub struct Preview {
    pub pipeline: Pipeline,
    pub original: String,
    pub compressed: String,
    pub original_tokens: usize,
    pub compressed_tokens: usize,
}

A computed preview: the original, the compressed form lean-ctx would emit, and the token/byte accounting for both.

Fields

pipeline: Pipeline

original: String

compressed: String

original_tokens: usize

compressed_tokens: usize

Implementations

impl Preview

pub fn original_bytes(&self) -> usize

pub fn compressed_bytes(&self) -> usize

pub fn saved_tokens(&self) -> usize

Tokens removed. Saturating: a pipeline never inflates in practice, but the accounting stays honest (never negative) if a pathological input did.

pub fn token_ratio(&self) -> f64

Compressed-to-original token ratio in [0.0, 1.0] (1.0 = no change, also the empty-input convention). Lower is better.

pub fn saved_pct(&self) -> f64

Percent of tokens saved, rounded to one decimal (derived from the ratio).

pub fn diff(&self) -> String

Line-level diff original→compressed via the shared differ.

pub fn render(&self) -> String

Human-readable report: an accounting header followed by the diff. Deterministic (no timestamps/counters) so the output is cache-stable (#498).