Function score_diff_features 

pub fn score_diff_features(
    size: JitSize,
    diffusion: JitDiffusion,
) -> (f64, JitDiffContributions)

Available on crate feature vcs-git only.

Compute the partial (size + diffusion only) JIT score for an arbitrary diff, reusing the same score math as a commit so the two terms are computed by one code path. The history, experience, and purpose terms are left at their zero defaults (no input), and their zero contributions are discarded — only size and diffusion survive into the returned JitDiffContributions.

The returned score is not comparable to a commit score; see JitDiffReport.