Tupi — Tupinambá · Bertioga, 1554 A bark-canoe war fleet paddles up the Bertioga channel at dawn. Real-time 3D in the browser, researched from 16th-century sources. Built with Claude Opus 5.5 + three.js: ~22h, 32 agents, ≈$516 in tokens. rubenmarcus.dev/demos/tupi @threejs @AnthropicAI