You'll notice
Useful2 Signal3
If someone else's Claude was summoned to a comment thread, your reply is dropped with a clear reason instead of retrying.
What's wrong with this entry?
Anonymous. No account, no email.
What
If a comment thread was summoned or activated by a different person's Claude session, the reply is now refused with a specific outcome, and the model is told the draft was discarded and not to retry rather than being left to guess.
Details
- A 403 identifying a foreign sender maps to a
summon_foreignoutcome, which is also an optional field on the reply schema. - Telemetry gains
summon_foreign_sender,summon_foreign_notice_suppressedandedit_reply_summon_foreign. - Part of the artifact comments feature, which is itself behind remote-config gates, so whether you see it depends on server configuration.
Evidence
summon_foreign_sender, reply not posted (another user's summon or activation)
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.