Source Intelligence

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.

All of v2.1.229 Home All releases olderv2.1.228 v2.1.231newer
Claude Code v2.1.229

IPv6 addresses in sandbox network rules must be bracketed

Use it now
Useful3 Signal2
Sandbox

Write IPv6 addresses in sandbox rules in bracketed, canonical form or enforcement gets conservative.

domaininjectHosts
What

Sandbox domain and injectHosts entries are now normalized and checked for bracketed IPv6 spellings, ports and canonical form. Entries with unreliable spellings still work, but enforcement becomes conservative: it denies at least what any readable interpretation denies, and allow rules never widen.

Details
  • Problem entries are collected and surfaced as doctor issues rather than failing startup.
Evidence

Sandbox network domain entries have unreliable spellings

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

See this entry in the whole of v2.1.229 →