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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

Messages from other sessions get a sanitized sender label

You'll notice
Useful3 Signal0
Transcript

Messages arriving from another session now show who sent them plus a chord to expand.

What

Transcript rows for messages arriving from another session render through a shared component that names the sender and offers an expand chord.

Details
  • Shows "Message" or "N messages" followed by "from @<name>" plus the expand chord.
  • The name is restricted to letters, digits, dot, underscore and hyphen, and truncated with an ellipsis.
  • SendMessage tool labels and teammate summaries use the same sanitizer.
Evidence

from @

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 →