Can a prompt replace Teachable?

Build a single-course sales-and-delivery site, scoped to exactly one course. Course content lives as Markdown files organized into modules and lessons, each optionally pointing at a video file. A public landing page shows the course outline and price, with a buy button going straight to a hosted checkout. A webhook from the payment processor marks the buyer's email as enrolled. Login is by magic link only — enter your email, receive a signed sign-in link — no passwords, no OAuth. Gate lesson pages by enrollment, and serve video through short-lived signed URLs so a direct link expires rather than staying shareable forever. Track progress with a mark-complete button per lesson and a progress bar per module, stored per student.

Do not build support for multiple courses, affiliates, certificates, upsells, or coupon logic — this sells and delivers exactly one course. Payment receipts come from the payment processor directly; don't build invoicing or tax logic yourself. Note plainly in the README that a small VPS handles a modest audience fine, but a real launch with a large audience needs dedicated video hosting, not files served off a general-purpose server.