Data-model rules that make a schema importable from day one, so the migration-import-engineer is never blocked on missing columns. Every SMB Product-Builder product must let a customer bring their data from an incumbent (ServiceTitan/Toast/Mindbody/Shopify) — that requires provenance (source_ref) and rollback (import_batch_id) on importable entities, and modelling real-world actors as entities…
Install
npx skills add avelikiy/great_cto --skill migration-ready-schemanpx skills add avelikiy/great_cto --skill migration-ready-schema -a claude-code -gnpx skills add avelikiy/great_cto --skill migration-ready-schema -a codex -ggemini skills install https://github.com/avelikiy/great_cto.git --path skills/migration-ready-schemagh skill install avelikiy/great_cto migration-ready-schemagit clone --depth 1 https://github.com/avelikiy/great_cto /tmp/avelikiy__great_cto
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/avelikiy__great_cto/skills/migration-ready-schema ~/.claude/skills/migration-ready-schema # Claude Code
cp -R /tmp/avelikiy__great_cto/skills/migration-ready-schema ~/.agents/skills/migration-ready-schema # Codex, Cursor, Gemini CLI, Copilot, OpenCode