A firm cannot open-source its method without giving away the product. A solo senior operator can, and that is the point. The stack is public because the fastest way to prove I can get your agent into production is to show the working code and the checks that get it there.
Read the repo, fork it, or hand it to your own engineers. The open artifact is proof of the work. The Assessment is that same rigor, pointed at your system.
The stack is the finished standard. The experiments and works in progress built around it live in Labs.