kaigen3d: a 400-line C starter template for 3D worlds, built for AI agents

gdechichi · x · 2026-10-07

A developer highlights the kaigen3d starting template: just 400 lines of C giving you a physics-based character controller, a procedural skybox with day/night cycles, a customizable editor, and native builds for PC, mobile and web.

The kicker: point your AI agent at the template and "go nuts" — a low-boilerplate, cleanly structured codebase is exactly the kind of foundation agents work well with.

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