- Updated the atom edit schema and tool prompt docs to replace the standalone `between` form with a 2-tuple `set` form for exclusive block-body replacement.
- Adjusted `resolveAtomToolEdit` so `set` accepts either a single anchor or `[open, close]`, translates tuple input to an internal between-style op, and rejects tuple values that are not anchor strings.
- Expanded tests to verify tuple-based `set` resolution and to enforce validation errors for invalid `set` array inputs.
- 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.
- Added raw read output propagation so read/archive commands bypass anchors, line numbers, and chunk formatting.
- Fixed atom/hashline editing by tightening hashline prefixes and applying grouped anchor edits in stable order.
- Hardened chunk parsing and path handling by using `bigram_end` checks and resolving edit paths via shared `args.path` fallback.
- Updated path-related behavior for chunk, replace, patch, and hashline previews to honor optional edit paths.
- Removed mode-level param validators and replaced them with runtime handling, then removed obsolete validation tests.
- Added `atom` edit mode to `EditTool` with single-point hashline-style dispatch and `executeAtomSingle`.
- Added `AtomToolEdit`/`AtomParams` schema and `atom` prompt docs to require one op per edit entry.
- Changed `EditTool` entry processing to inherit per-entry `path` from a top-level request `path` fallback.
- Added top-level `path` defaults to patch and replace schemas and now reject missing entry paths.
- Added an `atom` streaming strategy and registered it in `EDIT_MODE_STRATEGIES` for live mode support.
- Enabled hashline read anchors for `atom` mode via `file-display-mode.ts` path-display logic.
- Added `atom` unit tests covering schema checks, anchor conflicts, and hash mismatch diagnostics.
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