pub fn cache_dir(common_dir: &Path) -> PathBufExpand description
Everything regenerable, in ONE subtree.
reviews/ is deliberately a sibling rather than a child. A review’s
findings are the reader’s own work and cannot be recomputed, so nothing that
clears the cache may be able to reach them — and with the two rooted apart,
that is a property of the layout rather than of a command remembering to be
careful (ADR 0009, ADR 0013).