fr3dx

There is a builtin sandbox and various third-party options https://code.claude.com/docs/en/sandbox-environments

It is mentioned in the cloudflare blog post [1]

"At Cloudflare, we use Astro, too — for our developer docs, website, landing pages, and more"

[1] https://blog.cloudflare.com/astro-joins-cloudflare/

But now, browsers don’t share caches between origins for privacy reasons

I didn't heard about this thing until today, are you sure that it is already implemented in all major browsers? I have found this source [1] but for what I can tell, at the moment this feature is behind a flag in chromium and firefox (maybe it is already implemented in Safari).

[1] https://www.jefftk.com/p/shared-cache-is-going-away