Novichoks were specifically designed to avoid OPCW and CWC restrictions. Therefore all your protestations that the Russian CW program was destroyed are moot. Novichoks were not technically part of their CW program. Furthermore, your assertion that all one would need to create them is a book and a reasonably good lab is laughable. We are talking about one of the most toxic substances on earth. You would need extremely high expertise and elaborate facilities to handle the stuff safely. It is almost unimaginable that a non-state actor could accomplish this.