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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 v2.1.247

Unknown-machine error quotes the name you typed and softens its claim

You'll notice
Useful2 Signal1
Cross-Session Messaging

Messaging an unknown machine now quotes the name you typed and softens its claim about reachability.

What

Addressing a machine that is not attached now echoes back the name exactly as you wrote it rather than a normalised version, and says the machine did not answer when last asked instead of asserting it is unreachable now.

Evidence

though it did not answer when last asked, so a retry may fail until it is reachable again

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 v2.1.247 →