- Added `between` atom edits with `after`/`before` anchors and logged them in changelog docs.
- Added `between` docs to prompt tooling, including two-anchor exception and anchor-order rules.
- Added `between` validation to reject stale anchors, invalid ranges, overlap, and nested interior edits.
- Reworked `applyAtomEdits` to apply `between` operations as bottom-up interior splices and adjacent-line inserts.
- Updated `file_path` schema description in review tool to "Path to the file".
- Added `AtomEdit` tests for `between` parsing and edge-case success/failure coverage.