Context
Creators had raw knowledge in YouTube transcripts, PDFs or long-form docs but no scaffolding for learners. We built a platform that ingests any of those inputs and emits a structured course: modules, lessons, quizzes, reading-time estimates. Shipped to paying subscribers in one month.
Approach
Next.js 15 App Router with server actions for ingestion, Gemini for generation, Neon for state. NextAuth for email-only auth after we hit a dead end with Google OAuth (documented as ADR-0001). Stripe for subscription billing. Tailwind for UI.
Stack decisions
Gemini over OpenAI for cost at the target quality bar — course generation is a long-context task where Gemini Pro wins on price-per-token. Neon over Supabase for pure Postgres + branching on PRs. Vercel for deploy to pair with Next 15 edge features.
Outcome
Live at the link above. Four weeks from empty repo to first paying subscriber. Stripe subscription billing, email-only auth, course generation from any of three input formats. What we ship for clients with similar SaaS briefs.
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