Designs how a Python system stores durable records: record meaning and access patterns, invariants and state transitions, where each constraint is enforced, transaction and concurrency ownership, repository boundaries and a migration plan. Chooses the database from the requirements, writes no project files, and hands the persistence packet to design-tests.
Install
npx skills add rhawk117/rygentic-harness --skill design-persistencenpx skills add rhawk117/rygentic-harness --skill design-persistence -a claude-code -gnpx skills add rhawk117/rygentic-harness --skill design-persistence -a codex -ggemini skills install https://github.com/rhawk117/rygentic-harness.git --path plugins/python-harness/skills/design-persistencegh skill install rhawk117/rygentic-harness design-persistencegit clone --depth 1 https://github.com/rhawk117/rygentic-harness /tmp/rhawk117__rygentic-harness
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/rhawk117__rygentic-harness/plugins/python-harness/skills/design-persistence ~/.claude/skills/design-persistence # Claude Code
cp -R /tmp/rhawk117__rygentic-harness/plugins/python-harness/skills/design-persistence ~/.agents/skills/design-persistence # Codex, Cursor, Gemini CLI, Copilot, OpenCode