ApprovalPreview

Change counts for diff, taken before it was clipped for display.

The prompt's +N -M header must not be recounted from diff: the write_file and delete previews are built with max_lines=100, so a recount describes the preview rather than the change, and on the delete path that number gates destroying the file. The edit_file preview passes max_lines=None and so is safe to recount — do not read that as a cap covering all three.

Full pre-change file content, aligned to diff's old line numbers.

Syntax highlighting a diff needs the whole source, lexed from line 1, so changed rows can be located by hunk number — fragments of the change cannot serve (see compose_diff_lines' before contract). Only the edit_file preview populates this, and only when the replacement succeeded; it is None for the other producers, for an unreadable or oversized file, and for a replacement that does not apply. It is not clipped the way a diff may be.

Full post-change file content, aligned to diff's new line numbers.

Populated on the same terms as before.