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
ImprovementsKind: in v2.1.247,
ImprovementsSection of the release
What
When the check for whether a peer session can receive cross-session messages fails outright, Claude Code logs the failure and treats that session as not having reported support, so the send carries the same unconfirmed-delivery caveat for the model and the shorter note on screen.
Details
The log line is [agents:cloud] warm inbound-report lookup failed.
No gate: a lookup failure always falls back to the cautious wording rather than assuming delivery worked.
Evidence
[agents:cloud] warm inbound-report lookup failed
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
