Architecture review: project structure and code quality

[f3rdy]

Description

Review the initial codebase for architecture, code quality, and best practices before adding more features.

Review Areas

Project Structure

• Module boundaries make sense (cli.py, config.py, password.py, vault.py, keys.py, yaml_util.py)
• src layout correct for packaging
• No circular imports

Code Quality

• Error handling consistent and user-friendly
• Type hints complete and correct
• mypy strict mode passes
• bandit security scan clean
• No hardcoded values or magic strings

CLI Design

• Command names and flags intuitive
• Help texts clear and complete
• Output formatting consistent (German user messages)
• Exit codes correct (0 success, 1 error)

Testing

• Test coverage adequate (currently ~80%)
• Edge cases covered
• Fixtures well-structured
• Integration tests use real ansible-vault (not mocked)

Configuration

• Config discovery logic robust (env, upward search, user-global)
• Path resolution correct (relative to config file)
• Password fallback chain complete

CI/CD & Tooling

• pre-commit hooks match CI pipeline
• semantic-release config correct
• ruff rules appropriate

Outcome

List of actionable improvements as sub-issues or a checklist in this issue.