Adding Auth: Enabling AI Agents to Integrate with Auth.js Authentication via Standard Procedures

*adding-auth* has been included in awesome-cursor-skills. The integration of Auth.js v5 with Next.js App Router has been organized into an 8-step workflow: dependency installation, setting up AUTH_SECRET, auth.ts configuration, OAuth setup, Route Handler implementation, login UI and route protection, and optional database Adapter. Verified against the official SKILL.md and Auth.js documentation, this article introduces the installation method and typical usage, suitable for web developers who need to quickly integrate OAuth and sessions.