You'll notice
Useful3 Signal3
Messages from sub-agents now arrive labelled with which agent sent them.
What's wrong with this entry?
Anonymous. No account, no email.
What
Cross-session messages sent by a sub-agent are now wrapped in an <agent-message from="..."> envelope before being sent, on both the bridge and local-socket paths. Previously the raw text went out unattributed, so the recipient could not tell which agent wrote it.
Evidence
agent-message
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.