- MovePlan gains moves[] (file move = 1 relocation), left_behind[] for
unindexable files that deliberately stay, prune_dirs[] applied after the
batch (remove_dir only succeeds when empty, leftovers keep their home)
- plan::dir: nesting/target-exists guards, merged per-file rewrites
- apply: atomic N-rename batch (per-file git mv), rollback restores every
move, rewrite and created dir newest-first
- mv_reject accepts dirs; --json adds moved_files/would_move_files only for
real dir moves (single-file contract byte-identical); summary shows
(N files) and left-behind count
- engine rollback/prune tests moved to tests/apply.rs (public API; a
mid-batch failure cannot be forced through the CLI), java-rule e2e split
into its own binary to keep every file under the 250-line budget
