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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

Two new sandbox diagnostics for IPv6 misconfiguration

Use it now
Useful3 Signal2
Sandbox

claude doctor now flags badly written IPv6 entries in your sandbox network rules.

claude doctorinjectHosts
What

claude doctor now flags unbracketed or non-canonical IPv6 addresses in allow and deny network domain entries, and credential injectHosts entries that can never match their destination because they are bracketed, carry a zone id, or are not canonically compressed. Each says to rewrite the entry as the bare, canonically-compressed address.

Evidence

Sandbox credential injectHosts entries can never match their destination

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 →