- Removed the `fflate` dependency in favor of using `node:zlib` for ZIP operations.
- Updated documentation and internal code comments to reflect the transition to native `node:zlib` DEFLATE support.
- Centralized archive operations into a new `utils/zip.ts` module with unified support for ZIP, tar, and tar.gz formats.
- Optimized ZIP reading using lazy, ranged central-directory access and implemented ZIP64 support for large files.
- Hardened archive extraction with directory traversal protection and configured memory limits for loading and extraction.
- Refactored tool-specific logic to utilize the new centralized utility and deleted the redundant `archive-reader.ts`.
- Updated `executeToolCalls` to always pass the active `toolSignal` into `tool.execute` rather than bypassing it for non-abortable tools.
- Removed the `nonAbortable` option from `AgentTool` and from the read, write, and edit tools so they can no longer opt out of abort handling.
- Documented the cancellation behavior change in the affected tool docs and package changelogs.
- Prepended `¶path#TAG` hashline header to plain file, ACP-bridge, and conflict resolution write results.
- Bulk conflict resolutions emit a trailing `Snapshots:` block with one header per written file.
- Suppressed when hashline display mode is disabled or for archive/SQLite/internal-URL targets.
- Added tests covering header presence, patcher usability, and disabled-mode suppression.
- Replaced per-line hash anchors with file-level hash validation in hashline format, changing anchor syntax from LINE+HASH to bare LINE numbers.
- Simplified hashline line separator from pipe (|) to colon (:) and replaced replace operator (->) with colon, added delete operator (!) for explicit line deletion.
- Implemented file-read snapshot caching with multi-snapshot ring buffer per path and file-hash-based recovery to detect and recover from stale edits.
- Refactored hashline grammar, parser, and execution to support file-level hash binding, anchor-scoped validation, and structural bracket warnings for delete operations.
- Updated documentation and test fixtures to reflect new hashline syntax with file hashes, colon separators, and delete operator throughout.
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