Building a real SaaS used to mean a weekend of auth, billing, and email plumbing, and AI assistants make it worse by inventing file structures. Coding Capybaras is the Next.js + Supabase + Stripe boilerplate purpose-built for Claude Code, Cursor, Codex or Copilot. 114 integration guides ship as copy-paste prompts your AI executes cleanly. Free to use AND the tech stack is Free too. So build anything and launch with $0 monthly costs Pro unlocks the marketplace + more features for one time $97