I've noticed often that when I google for CIF documentation (I find it faster than using the Table of Contents), it links to a specific version page. For example when I google `ESCET CIF documentation`, the first hit links to `https://www.eclipse.org/escet/v0.1/cifc`. Ideally, we want only links to the non-version pages. I've read that this can be accomplished by creating a `robots.txt`. See E.g., [this issue](https://github.com/readthedocs/readthedocs.org/issues/2430) or [this issue](https://github.com/astropy/astropy/issues/7794), and [this example file](https://mitiq--1543.org.readthedocs.build/en/1543/robots.txt).