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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.229

Sandbox doctor warns about unbracketed IPv6 hosts

You'll notice
Useful2 Signal1
Sandbox

Sandbox diagnostics warn when an IPv6 host in a rule is missing square brackets.

What

Sandbox diagnostics now flag permission rules that name an IPv6 address without square brackets, both for domain rules and for injected hosts, so a rule that silently fails to match gets called out.

Details
  • Two new checks, one for domains and one for inject hosts; the existing Linux glob-pattern warning summary now shares a common formatter.
Evidence

getUnbracketedIpv6DomainWarnings

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.229 →