Football site built with AI agents

As a football fan who genuinely enjoys thinking about tactics and shapes, I had an idea for a starting eleven builder anyone can use. I also wanted to see what Codex with GPT-6.1 Sol could do. I pitched the idea, and together we wrote the PRD, prepared the footballing resources (14 formations, 25 player roles and the squad), and found and implemented an API for the fixtures.

Then Codex built the site, in under two days. It worked. It was also ugly.

The visual style was the definition of AI slop, and no amount of different prompts fixed it. So I brought in Claude Code and connected it to Mobbin through MCP.

I also made a quick sketch in Figma, in ten minutes, to give it more direction and context.

We rebuilt the visual side from the ground up: a dark page, the fixture in huge type and a real-looking pitch with the players on it as pills. And not only the looks: the usability and the whole experience got reworked too, on desktop and on the phone.

Once that was sorted, it was time for animations: adding them and fine-tuning them until the look and feel was right.

We agreed on the domain, supporterxi.com, and created simple branding: the player pill became the logo. Codex implemented Ant Design for the admin, and Claude built a design system, a 404 page and basic analytics with PostHog. Then we fixed a few issues in the admin, brought everything up to date and connected the domain to Vercel. It was nearly showtime.

Before anyone saw it, there was one last round: a review of the code, the security check and writing the privacy notice.