Reorganize: Move all skills to skills/ folder

- Created skills/ directory
- Moved 272 skills to skills/ subfolder
- Kept agents/ at root level
- Kept installation scripts and docs at root level

Repository structure:
- skills/           - All 272 skills from skills.sh
- agents/           - Agent definitions
- *.sh, *.ps1       - Installation scripts
- README.md, etc.   - Documentation

Co-Authored-By: Claude <noreply@anthropic.com>

skills/clerk-auth/skill.md

@@ -0,0 +1,56 @@
+---
+name: clerk-auth
+description: "Expert patterns for Clerk auth implementation, middleware, organizations, webhooks, and user sync Use when: adding authentication, clerk auth, user authentication, sign in, sign up."
+source: vibeship-spawner-skills (Apache 2.0)
+---
+
+# Clerk Authentication
+
+## Patterns
+
+### Next.js App Router Setup
+
+Complete Clerk setup for Next.js 14/15 App Router.
+
+Includes ClerkProvider, environment variables, and basic
+sign-in/sign-up components.
+
+Key components:
+- ClerkProvider: Wraps app for auth context
+- <SignIn />, <SignUp />: Pre-built auth forms
+- <UserButton />: User menu with session management
+
+
+### Middleware Route Protection
+
+Protect routes using clerkMiddleware and createRouteMatcher.
+
+Best practices:
+- Single middleware.ts file at project root
+- Use createRouteMatcher for route groups
+- auth.protect() for explicit protection
+- Centralize all auth logic in middleware
+
+
+### Server Component Authentication
+
+Access auth state in Server Components using auth() and currentUser().
+
+Key functions:
+- auth(): Returns userId, sessionId, orgId, claims
+- currentUser(): Returns full User object
+- Both require clerkMiddleware to be configured
+
+
+## ⚠️ Sharp Edges
+
+| Issue | Severity | Solution |
+|-------|----------|----------|
+| Issue | critical | See docs |
+| Issue | high | See docs |
+| Issue | high | See docs |
+| Issue | high | See docs |
+| Issue | medium | See docs |
+| Issue | medium | See docs |
+| Issue | medium | See docs |
+| Issue | medium | See docs |