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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 v2.1.222

Isolation refusal messages distinguish session from agent

You'll notice
Useful2 Signal0
Worktrees

Isolation refusal messages now say whether the session or the agent is the one confined.

What

The refusals you get when a shell cwd or file edit escapes a worktree now name the right subject.

Details
  • picks between "This session is isolated…" and "This agent is isolated…" based on whether the pin is the session's own worktree, with a matching possessive
  • shell cwd and file edit paths now share one escape-detection routine
Evidence

possessive: "a worktree-isolated agent's"

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 v2.1.222 →