Function body_match_fraction

atomic-cli/src/commands/vault/context.rs:568–578

Fraction of seed terms present as exact body tokens (case-insensitive).

(terms: &[String], body: &str)

/// Fraction of seed terms present as exact body tokens (case-insensitive).
fn body_match_fraction(terms: &[String], body: &str) -> f64 {
    if terms.is_empty() {
        return 0.0;
    }
    let body_tokens: HashSet<String> = search_terms(body).into_iter().collect();
    let matched = terms
        .iter()
        .filter(|term| body_tokens.contains(*term))
        .count();
    matched as f64 / terms.len() as f64
}

/// Recency component in [0, 1]: 1.0 for "just updated", halving every
/// [`RECENCY_HALF_LIFE_DAYS`]. Unparseable timestamps score 0.