Build Standards
The written architecture rules a site carries with it so every change, by any person or AI, follows the same shape.
Build standards define one architecture, one set of content contracts, and one schema pattern. They live with the site so that whoever picks it up next, human or AI, inherits the conventions instead of inventing new ones.
This is the specific thing that stops AI-assisted development from producing twenty subtly different sites. The speed was never the problem. The drift was.