One WhatsApp Message, 9 Builds Overnight: How Critic Agents Made a Shippable AI-Built Website
jamesbrooksco · x · 2026-10-14
Developer James Brooks recounts how one WhatsApp message at 23:35 kicked off an overnight "gauntlet loop": by 02:48 his AI agents had built a full website (GAIL's location-effect tool), had it torn apart by independent critic agents, and rebuilt it 9 times before shipping on its own domain by lunch.
Key takeaways:
- Prompt shape: idea link, method (overnight gauntlet loop), quality bar, feature list (map, news, nearby listings, filters), deadline + delivery location — no tech stack specified.
- Make agents hate their own work: independent critic agents force rebuilds, countering the "fast, confident, wrong" failure mode.
- Security setup: agents build in a homelab, pushing static files one-way to Cloudflare Pages (static site + one waitlist function), no tunnels or open ports, CSP/HSTS/nosniff headers, same-origin analytics relay.
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