OptionaldiffThe shaped patch for the range, when diff capture is enabled (the default).
Undefined when disabled via includeDiff: false. Sensitive, generated, and
binary files are skipped; per-file and total line caps apply.
The resolved "from" ref (exclusive). May be empty for the repo root.
Total insertions / deletions across the range.
The resolved "to" ref (inclusive).
The collected change set between two refs.