sdlc-python-app-conventions

Application and library conventions for plain Python projects (no web framework): src/ package layout, CLI tooling (argparse/click/typer), configuration management (pydantic-settings), logging setup, module design, entry points, and packaging conventions. Activated automatically by python-plugin/stack.md as a convention skill for the development phase. Use this skill to: - Organise Python application code in a src/ layout with proper package structure. - Build CLI tools with argparse, click, or typer and register them as console scripts. - Manage configuration from environment variables using pydantic-settings. - Set up structured logging for production-grade applications. - Package a Python project correctly with pyproject.toml. Do NOT use this skill for: - Language idioms (type hints, dataclasses, enums, match/case) — see sdlc-python-conventions. - Package manager commands (ruff, mypy, pip/poetry/uv) — see sdlc-python-tooling. - Testing patterns — see sdlc-pytest-testing. - Web framework patterns (Django/FastAPI/Flask) — see those framework plugin skills.