Sequelize v7 — Claude Skill

Key Differences from Sequelize v6

• Package renamed: sequelize → @sequelize/core
• Dialects are separate packages (e.g., @sequelize/postgres, @sequelize/sqlite3)
• Decorator-based model definitions (recommended over Model.init())
• Constructor only accepts a single options object (no URL string as first arg)
• dialectOptions removed — settings go in top-level options
• CLS transactions enabled by default (no manual setup needed)
• Default association names are now camelCase (userId not UserId)
• sequelize.transaction() only creates managed transactions; use sequelize.startUnmanagedTransaction() for unmanaged
• JSON null vs SQL NULL distinction: inserting null into JSON stores JSON 'null', not SQL NULL
• Minimum: Node >= 18, TypeScript >= 5.0

Skill Files