Capybara Island: a 24/7 world of capybaras with their own lives

The full story

Capybara Island is a small 3D world, running around the clock, where four capybara characters live with needs, memories, a life story, nightly reflection and diaries. Churro and Brisket live on an island, and Kalo and Suri in a harbour town across the water. Visitors can walk around, follow them, leave notes and send gifts. A second model acts as the world, ruling on whatever the characters try.

The maker described the idea to Claude Code on 5 November, and four days later it was live. Claude Code wrote essentially all of it: the three.js world, the simulation, a 24/7 stream to YouTube, Twitch and Kick from a headless browser, a pipeline that cuts and posts clips, and the deploys. The residents mostly run on DeepSeek to keep four always-on minds at about $2 a day.

Claude debugged collisions and lighting by pulling frames from the live stream. The hard parts were agents stuck in loops, including all four spending days squaring the same pavilion posts, and pacing the API budget.