Toolbound Stack is a working Next.js SaaS repo for founders building with Codex, Claude Code, Cursor or Windsurf. It starts from a sale-to-fulfilment base rather than a blank boilerplate: Stripe Checkout, Resend transactional email, Postgres persistence, setup checks, download delivery, seller alerts and workflow run records are wired.
Buyers also get the handoff layer: agent instructions, customisation briefs, setup guides and verification commands so a coding agent can adapt one workflow into a paid SaaS product without guessing where billing, email, data and launch assets live.