Create Auth Skill provides a structured guide for adding authentication layers to TypeScript and JavaScript applications using Better Auth. It begins with a planning phase that scans the project framework, database, and existing dependencies before prompting the user with structured questions to build a custom implementation plan. Following confirmation, it walks through setting up core and client configurations, database adapters, route handlers, and common plugins like two-factor authentication or organizations. Reach for this skill when you need a methodical, step-by-step approach to incorporating secure authentication into a web project.