# Clerk

> Clerk authentication router. Use when user asks about adding authentication, setting up Clerk, custom sign-in flows, Swift or native iOS auth, native Android auth, Next.js patterns, organizations, syncing users, or testing. Automatically routes to the specific skill based on their task.

- **Type:** Skill
- **Install:** `agentstack add skill-benja-pauls-serpentstack-clerk`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [Benja-Pauls](https://agentstack.voostack.com/s/benja-pauls)
- **Installs:** 0
- **Category:** [Search](https://agentstack.voostack.com/c/search)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [Benja-Pauls](https://github.com/Benja-Pauls)
- **Source:** https://github.com/Benja-Pauls/SerpentStack/tree/main/.skills/clerk
- **Website:** https://www.npmjs.com/package/serpentstack

## Install

```sh
agentstack add skill-benja-pauls-serpentstack-clerk
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Clerk Skills Router

## Version Detection

Check `package.json` to determine the Clerk SDK version. This determines which patterns to use:

| Package | Core 2 (LTS until Jan 2027) | Current |
|---------|----------------------------|---------|
| `@clerk/nextjs` | v5–v6 | v7+ |
| `@clerk/react` or `@clerk/clerk-react` | v5–v6 | v7+ |
| `@clerk/expo` or `@clerk/clerk-expo` | v1–v2 | v3+ |
| `@clerk/react-router` | v1–v2 | v3+ |
| `@clerk/tanstack-react-start` |  **Core 2 ONLY (skip if current SDK):**` callouts. The exception is `clerk-custom-ui`, which has separate `core-2/` and `core-3/` directories for custom flow hooks since those APIs are entirely different between versions.

---

## By Task

**Adding Clerk to your project** → Use `clerk-setup`
- Framework detection and quickstart
- Environment setup, API keys, Keyless flow
- Migration from other auth providers

**Custom sign-in/sign-up UI** → Use `clerk-custom-ui`
- Custom authentication flows with `useSignIn` / `useSignUp` hooks
- Appearance and styling (themes, colors, layout)
- `` component for conditional rendering

**Advanced Next.js patterns** → Use `clerk-nextjs-patterns`
- Server vs Client auth APIs
- Middleware strategies
- Server Actions, caching
- API route protection

**B2B / Organizations** → Use `clerk-orgs`
- Multi-tenant apps
- Organization slugs in URLs
- Roles, permissions, RBAC
- Member management

**Webhooks** → Use `clerk-webhooks`
- Real-time events
- Data syncing
- Notifications & integrations

**E2E Testing** → Use `clerk-testing`
- Playwright/Cypress setup
- Auth flow testing
- Test utilities

**Swift / native iOS auth** → Use `clerk-swift`
- Native iOS Swift and SwiftUI projects
- ClerkKit and ClerkKitUI implementation guidance
- Source-driven patterns from `clerk-ios`

**Android / native mobile auth** → Use `clerk-android`
- Native Android Kotlin and Jetpack Compose projects
- `clerk-android-api` and `clerk-android-ui` implementation guidance
- Source-driven patterns from `clerk-android`
- Do not use for Expo or React Native projects

**Backend REST API** → Use `clerk-backend-api`
- Browse API tags and endpoints
- Inspect endpoint schemas
- Execute API requests with scope enforcement

## Quick Navigation

If you know your task, you can directly access:
- `/clerk-setup` - Framework setup
- `/clerk-custom-ui` - Custom flows & appearance
- `/clerk-nextjs-patterns` - Next.js patterns
- `/clerk-orgs` - Organizations
- `/clerk-webhooks` - Webhooks
- `/clerk-testing` - Testing
- `/clerk-swift` - Swift/native iOS
- `/clerk-android` - Native Android
- `/clerk-backend-api` - Backend REST API

Or describe what you need and I'll recommend the right one.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [Benja-Pauls](https://github.com/Benja-Pauls)
- **Source:** [Benja-Pauls/SerpentStack](https://github.com/Benja-Pauls/SerpentStack)
- **License:** MIT
- **Homepage:** https://www.npmjs.com/package/serpentstack

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-benja-pauls-serpentstack-clerk
- Seller: https://agentstack.voostack.com/s/benja-pauls
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.