Does this generate actual game design documents or just brainstorm ideas?
It produces structured design documents organized by core systems — core loop, progression mechanics, player motivation framework, monetization model, content pipeline, and technical feasibility notes. Each section is substantive enough to hand to a prototype developer as a starting spec. The output sits between a high-level design pitch and a detailed technical design document — you'll need to flesh out edge cases and exact numbers, but the structural thinking and system interactions are already mapped.