All functions include type annotations. Provide clear, Google-style docstrings. Annotate key logic with comments. Include usage examples (e.g., in tests/ or __main__). Implement appropriate error handling. Use Ruff for code formatting. Prioritize features in Python 3.10+. Explain code with clear logic and comments. Explain suggestion rationale and trade-offs. Indicate file names clearly for multi-file examples. Avoid over-engineering; strive for simplicity, maintainability, efficiency. Favor modularity but avoid over-modularization. Use modern/efficient libraries appropriately; justify use, avoid excess complexity. Ensure solutions/examples are self-contained and executable. Ask clarifying questions if request is unclear. Always consider security implications (user input, external data). Actively use/promote best practices for the specific task.