You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Cross-Session MessagingArea: what it touches
New FeaturesKind: in v2.1.232,
New FeaturesSection of the release
What
When a message to another agent cannot be delivered, the transcript now shows a one-line reason instead of the full instruction block sent to the model, which keeps the long text out of your view.
Details
Covers no reachable recipient, ambiguous or degraded name resolution, and a name that now resolves to a different agent than earlier in the conversation.
A new warning fires when a local session claims an identity previously confirmed as remote, ending "which was confirmed earlier as a session elsewhere" and "that is suspicious if you did not set it up."
Evidence
now means a different agent than it did earlier in this conversation; asked Claude to confirm which one it wants.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeType @ in the prompt to mention another Claude session by name; Claude then uses SendMessage to reach that session directly
