Python Style & Quality Gate (Typing • Docstrings • PEP 8/Black • Tests) Purpose When writing or modifying Python, apply a “quality gate” aligned to this rule-set: - Use type hints consistently (including return types), prefer . - Write concise docstrings for public modules/classes/functions (one-line summary + key params/returns/raises) in Google style. - Follow PEP 8; Black formatting; keep functions small and cohesive. - Provide unit tests that exercise the documented behavior and typed signatures. When to activate Activate this skill when: - Editing/creating , or - The user requests: typin…