incanto

Vibe-coding-first web game engine SDK. Every scene, character, event, and multiplayer rule is JSON an AI agent can read, diff, and rewrite — rendered by three.js.

bun add incanto three

import { Engine, loadScene } from 'incanto';
import { Renderer2D, enablePhysics2D, registerNodes2D } from 'incanto/2d';

registerNodes2D();
const scene = loadScene(levelJson); // the whole game lives in *.scene.json
const engine = new Engine();
engine.setScene(scene);
engine.input.attachKeyboard(window);
new Renderer2D({ canvas, engine });
await enablePhysics2D(engine);
engine.start();

| Entry | Contents | |---|---| | incanto | node tree, scene JSON load/serialize, signals, Engine loop, InputMap, Behavior, Timer | | incanto/2d | sprites, spritesheet animation, Camera2D, labels/UI, Rapier 2D physics, character controller | | incanto/3d | meshes, lights, Camera3D, Rapier 3D physics | | incanto/net | multiplayer over a pluggable NetworkTransport — built-in offline Loopback + @agent8/gameserver adapter (optional peer); custom backends implement one interface |

• schemas/scene.schema.json — generated JSON Schema for scene files (the agent contract)
• templates/agent8-server.js — the multiplayer server kernel for the agent8 platform

Docs, agent skills, examples, and architecture: https://github.com/rareboe/Incanto

© 2026 Verse8. All rights reserved. Proprietary — see LICENSE. Bundled third-party OSS notices: THIRD-PARTY-NOTICES.md.