chore(release): version 0.4.0

Author: apiad

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.0] - 2026-02-28
+
+### Changed
+- Refactored the hook system: centralized shared logic into `.gemini/hooks/utils.py` and renamed hook files for consistency (`session.py`, `log.py`, `make.py`, `journal.py`).
+- Added PEP 257 docstrings to all hooks and improved internal documentation.
+
+### Added
+- Updated `TASKS.md` and `journal/2026-02-28.md` with details of the hook refactoring.
+- Ignore `__pycache__` directories in `.gitignore`.
+
 ## [0.3.0] - 2026-02-28
 
 ### Added