- Added comprehensive unit test suite covering AI, core, plugins, completion, API, and hooks using pytest.
- Replaced bare 'except:' clauses across the codebase with specific exception handling (e.g., ValueError, KeyError, OSError) to prevent swallowing system exit calls.
- Fixed Python 3.8+ AST compatibility in plugins.py (support for ast.Constant).
- Removed deprecated pkg_resources import from __init__.py.
- Fixed missing 'printer' import in configfile.py that caused NameErrors during save failures.
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