You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Cross-Session MessagingArea: what it touches
New FeaturesKind: in v2.1.232,
New FeaturesSection of the release
What
When Claude Code cannot enumerate the sessions running on this machine while resolving which session to message, it now says so instead of implying no match exists.
Details
New messages: "the sessions on this machine could not be listed just now" and "this machine's and your account's other sessions could not all be checked just now".
The condition also blocks the shortcut that auto-picks a single obvious match, so you are asked rather than silently routed.
The same state is included in the diagnostic payload for the lookup.
Evidence
the sessions on this machine could not be listed just now
Strings lifted out of the shipped bundle, so the claim above can be checked against them.