batch0

Accelerators for high-school founders are mostly either free and unserious, or priced for parents. batch0 is a cohort program that ends in a demo day judged by actual investors, priced so a teenager can pay for it out of their own money.

I built the whole stack behind it: the marketing site, the application flow, the student dashboard, the mentor tooling, and the admin side that actually runs a cohort. Next.js and Supabase. Roles are database rows rather than hard-coded strings, so adding a new kind of mentor is a row, not a deploy.

The first cohort ran to demo day in May 2026. It was called SparkLine then, and the legal entity still is — the program renamed, the paperwork did not.