coding-guidance-pythonlisted

# Python Coding Guidance This skill adds portable Python implementation, refactoring, and review guidance. ## Adjacent Skills This skill provides portable Python engineering principles. Compose with: - **Workflow:** **thinking** (ambiguous decision framing), **recursive-thinking** (stress-testing), **security** (threat modeling) - **Domain overlays:** **backend-guidance** (server-side code), **backend-systems-guidance** (stronger backend architecture, reliability, and trust-boundary work), **ui-guidance** (graphical UI/web frontend), **project-core-dev** (repo-specific completion discovery and reporting when needed) Open bundled references only when the task needs that depth: - [references/python-language-and-testing-rules.md](references/python-language-and-testing-rules.md) for typing, interface, test, data-state, module, and architecture decisions - [references/python-packaging-and-layout.md](references/python-packaging-and-layout.md) for distribution, entrypoint, import-layout, or package-structure work - [references/python-service-boundaries.md](references/python-service-boundaries.md) for async cancellation, subprocesses, workers, and real external I/O or service boundaries ## When Not to Lean on This Skill - non-Python work - notebook-first exploratory work where reproducibility and module design are not the main concern - one-off throwaway scripts where the repo explicitly does not want production Python standards ## Implementation Wo