Short answer: Some of the wording was drafted with AI assistance, but the architecture, constraints, and reasoning model were designed manually.

Longer answer: The point of ArcOS isn’t to showcase AI-written copy — it’s to see how far a cognitive architecture can be shaped, constrained, and stabilized purely through natural-language specification. The interesting part is the design process and the constraint engineering, not the surface-level prose.

If you want, I can walk through the exact parts that were human-designed vs. constraint-driven.