It appears that they're replacing the "old" version of projects you describe, with a new version mentioned in the post. It's being rolled out in stages:
>The main reason we believe this was a distinct swarm is because these agents explicitly had internet access as part of their task—the whole point was web browsing. The Hugging Face agents were in a sandbox without internet access and had to hack their way out by exploiting the Artifactory package manager.
https://support.claude.com/en/articles/9517075-what-are-proj...