Design and verify data contracts, schema changes, migrations, rollbacks, backfills, compatibility windows, tenant isolation, and API-to-database field mapping. Use when changing database schema, event payloads, persisted documents, analytics tables, multi-tenant data boundaries, or any user-visible data contract where silent fallback or undeclared fields would be dangerous.
$npx -y skills add majiayu000/spellbook --skill data-contract-migrationsInstalls into the current project.
Run `npx skills use "https://github.com/majiayu000/spellbook" --skill "majiayu000/spellbook/data-contract-migrations"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/majiayu000/spellbook" that are relevant to the current task. Run `npx skills add "https://github.com/majiayu000/spellbook"` and select the relevant skills, then follow their instructions.