What
The sandbox limits which websites commands run by Claude can reach. Its default allowance for package registries, such as registry.npmjs.org, jsr.io, pypi.org and proxy.golang.org, used to be written out in place. It now comes from a shared list.
Why
The hosts allowed by default may differ from before. If a package install inside the sandbox starts failing to connect, check which registries are allowed.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear which hosts the shared list contains.