# Release 3.4.0

Release date: 2026-06-09

## ChangeLog

- Optimize `_errortools/classes/protocol.py`: fix `__all__` on Python < 3.11, remove dead code, and expand docstrings.
- Fix `get()` sentinel bug so `default=None` is correctly honored.
- Add `has()`, `clear()`, and `Registry.remove()` to plugin system.
- Improve test coverage for `_errortools/plugins.py`.
- Set `logger`'s floor level to `Level.TRACE` (the lowest level).
- Fix [#53](https://github.com/more-abc/errortools/issues/53) to import `_check_methods` from `_collections_abc` module in `_errortools/classes/abc.py`.
- Fixed flake8 F401 error in `errortools/__init__.py`.
- Improve compatibility in `errortools/__init__.py` to Python 3.11 (for `ExceptionGroup` compatibility).