Building in Public

Why we're building an AI-powered platform for browser-based playable worlds — and what it means for creators who have ideas but not the technical skills to build them.

Most AI coding tools struggle because the problem space is infinite. COSA's AI operates in a bounded domain — and that's why it produces reliable, production-quality output.

Why composite satisfaction models create deeper gameplay than single happiness bars — and how COSA's AI builder generates them from a plain English description.

A transparent look at how COSA's pricing model compares to Roblox, Steam, and traditional publishing — and why we believe creators deserve better.

Watch us build a complete tycoon world from scratch using only the COSA AI Builder — describing mechanics in plain English and having working systems generated in real time.

A deep dive into COSA's five engine families — Tycoon, Life Sim, Story, Builder, and Competition — and how each one gives creators a running start.