Fable 5.1 Agent Swarms Generate Walkable 3D Worlds as Code, Verified Against Photos With Playwright
PhiloLabs published fable51-worlds on September 2, 2026 (MIT, 411 stars, 19 forks as of today), using Claude Fable 5.1 agent swarms to turn a text, image or video brief into browser-walkable Three.js environments with no game engine or pre-made assets. Every building, sign and plant is emitted as code rather than a binary mesh or latent representation, so edits are localized instead of requiring a full regeneration. The pipeline runs research agents for map, elevation and storefront data, then verifies output with Playwright-driven comparison of rendered viewpoints against real photographs plus independent architect, geographer and artist reviewer agents; two worlds ship complete, Union Square in San Francisco and Higashiyama in Kyoto.
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