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    Auth & Multi-Tenant SaaS Foundation

    2

    Add login and multi-tenant accounts to your SaaS: sessions, OAuth/SSO, roles and permissions, organizations, teams, invites and row-level data isolation.

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    Auth & Multi-Tenant SaaS Foundation

    Auth & Multi-Tenant SaaS Foundation

    Example session with this skill installed

    Scaffold a multi-tenant auth system for my Next.js and Prisma app using PostgreSQL. I need Google OAuth, team invitations, and RBAC with Owner, Admin, and Member roles.

    • Read your context and instructions
    • Compiled the auth & multi-tenant

    I've generated a production-ready auth foundation:

    • Prisma schema with User, Org, and Invite models
    • PostgreSQL Row-Level Security (RLS) policies for tenant isolation
    • Google OAuth adapter with email verification
    • RBAC middleware enforcing Owner/Admin/Member permissions
    • Security test suite

    Connects securely to your tools. The creator never sees your data.

    About this skill

    Authentication and multi-tenancy are the foundation every SaaS stands on, and the two things you cannot get wrong. They're also the parts most teams rush, copy from a tutorial, and quietly ship with holes in them.

    Auth & Multi-Tenant SaaS Foundation turns your AI agent into a senior platform engineer that scaffolds a complete, production-grade account and tenancy system end to end — wired to your app and database with the security edge cases already handled.

    The Problem

    The happy path of logging a user in is easy. The parts that cause breaches are everything else: a session token that never rotates after a password change, a reset flow that leaks whether an email exists, an OAuth callback that trusts an unverified email, a role check that lives in the frontend instead of the backend, and the most expensive mistake of all — a tenant boundary that almost works, so a user from one company can load another company's data by changing an ID in the URL. By the time these surface, you have a security incident or a painful migration on the layer that touches every request.

    What It Does

    1. Authentication — Email/password auth with proper hashing, email verification, and a password-reset flow that does not leak account existence, plus session management with rotation, revocation, and secure cookies.

    2. OAuth & SSO — Social login and SSO (Google, GitHub, Microsoft) behind one interface, with verified-email enforcement and account linking so a user is never silently duplicated.

    3. Organizations & Teams — The multi-tenant model: organizations, memberships, team invitations with expiry, and ownership transfer, so your app supports real companies, not just lone users.

    4. Role-Based Access Control — A backend-enforced RBAC layer (roles, permissions, guards) so authorization decisions live on the server, never in the UI.

    5. Tenant Data Isolation — Row-level isolation via scoped queries and, on PostgreSQL, database row-level security policies, plus tests that deliberately try to break the boundary and confirm they fail.

    Why It's Worth It

    A billing bug costs you a refund. An auth or tenant-isolation bug costs you the company. This is the highest-stakes, highest-leverage layer in any SaaS, and the one most likely to be quietly broken in a hand-rolled build. This skill front-loads the security decisions that are painful to retrofit and hands you a foundation you can build every feature on top of with confidence. It pairs cleanly with a billing system: this owns accounts, roles, and tenancy; billing owns subscriptions and seats.

    Scaffolds and enforces security patterns but cannot guarantee your whole app is secure — a human should review and run a security audit before launch. Generates OAuth/SSO adapters, but you register your own apps and supply credentials at your provider. Row-level security policies are generated for PostgreSQL; other databases get application-level isolation instead. Billing, subscriptions, and seat management are out of scope and pair with a dedicated billing skill.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

      Your agent shows a sign-in link. Sign in and click Allow.

    3. 3

      Ask for what you need

      Your agent loads this skill and uses it on your task. It always asks before any payment.

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    Security scanned

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    6 uses

    Times used to date

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    Trust & safety

    Security scan

    Security scan passed 4 months ago

    Permissions

    Read Files
    Write Files

    File Scopes

    src/**
    app/**
    lib/**
    prisma/**

    Read access is used to inspect your existing app structure, schema, and config. Write access is used to scaffold the auth modules, OAuth/SSO adapters, RBAC layer, schema and migrations, row-level security policies, and tests. Terminal access is used to install dependencies and run the generated migrations. The skill never runs anything against your production database or providers and never stores credentials; you register your own OAuth apps and supply secrets yourself.

    Listed4 months ago
    Updated24 days ago

    What's inside

    Frequently Asked Questions

    This skill scaffolds a production-ready authentication and multi-tenant architecture, including OAuth/SSO, role-based access control, and row-level data isolation, ensuring users cannot access data belonging to other organizations.

    This skill is designed for AI agents that support modern web stacks; it primarily outputs TypeScript code and provides configuration for PostgreSQL databases to implement robust row-level security.

    You get a comprehensive blueprint and implementation guide for sessions, social login, team invitations, and RBAC, along with automated test sets designed to verify tenant isolation boundaries.

    Implementation is designed to be streamlined; once your AI agent has the skill, it can scaffold the entire foundation and wire it to your specific database schema typically within a single development session.

    While this skill handles the core account, organization, and permission structure, it is designed to hand off seamlessly to billing agents that manage seat counts and subscription tiers based on the generated roles.

    Yes, the foundation is built to scale from a single organization with a few users to complex multi-team enterprise environments, supporting ownership transfers and expiring team invitations out of the box.

    New in APIs & Backend