Launch a Subscription Store Agent Skill

Launch a Subscription Store

Companion skill for the Launch a Subscription Store course. Build a production-ready subscription storefront with Next.js 16, Supabase Auth, and Stripe.

Commands

/subscription-store learn

Start the guided learning loop. 17 lessons covering authentication, payments, and access control.

/subscription-store new

Scaffold a new subscription store project:

• Deploy starter repo to Vercel (one-click)
• Clone locally and install dependencies
• Create Supabase project and configure env vars
• Set up Stripe account and API keys
• Verify dev server runs with working home page

/subscription-store submit

Evaluate your current implementation against the active lesson's outcomes.

Content source

https://vercel.com/academy/subscription-store.md           → course overview
https://vercel.com/academy/subscription-store/<lesson>.md   → lesson content

Core concepts

Authentication (Supabase Auth)

• Browser and server Supabase clients via @supabase/ssr
• Sign-up/sign-in with Server Actions and error handling
• Session management via proxy.ts pattern (replaces legacy middleware)

Payments (Stripe)

• Stripe SDK setup for server and client
• Checkout flow via Server Action → Stripe hosted checkout
• Subscription management via Stripe Customer Portal

Access control

• Server-side subscription checks in Server Components
• Client-side UI states responding to subscription status
• Protected API routes with authorization checks

Progress detection

| Signal | Lesson area |

|---|---|

| Starter deployed, package.json exists | Setup (1) |

| .env.local with NEXT_PUBLIC_SUPABASE_URL | Supabase config (2-3) |

| app/(auth)/sign-up/page.tsx exists | Auth pages (4) |

| proxy.ts with session handling | Route protection (5) |

| .env.local with STRIPE_SECRET_KEY | Stripe config (6) |

| Pricing page fetching from Supabase | Pricing (7) |

| Checkout Server Action implemented | Checkout flow (8) |

| Subscription management page rendering | Management (9-10) |

| Access control checks in Server Components | Access control (11-14) |

| Error boundaries and loading states | Polish (15) |

| Header with auth-aware navigation | Navigation (16) |

| Deployed to production | Ship (17) |

Teaching guidelines

• This course has 17 lessons — pace accordingly, don't rush
• Each lesson has a clear "hands-on exercise" — make sure they do it
• Supabase and Stripe both require external dashboard steps — guide precisely
• Check .env.local frequently — missing keys are the #1 blocker
• The proxy.ts pattern is new (Next.js 16) — expect questions about it