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Fable 5.1 agent swarms built an explorable Union Square in Three.js, and the repo added Kyoto 12 hours later
PhiloLabs/fable51-worlds ships browser-native reconstructions of real places generated end to end by autonomous Claude Fable 5.1 agents, with 129 identified storefronts, working traffic lights, cable cars, and two walkable interiors at Apple Union Square and Nintendo San Francisco. Nine independent reviewer agents, geometric, semantic, architect, SF local, environment artist, technical artist and interaction, filed reports that drove fix cycles. The repo was created 2026-09-02 18:19Z, hit 279 points on Hacker News, and merged a Higashiyama, Kyoto world at 2026-09-03 06:09Z; PROMPT.md contains the verbatim brief that produced it.
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