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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Cross-session messages from sub-agents now say whose address they were sent under

Messages a sub-agent sends elsewhere now say they went under the session's address.

You'll notice New Features
JSON All of v2.1.248
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 v2.1.248,
New FeaturesSection of the release
What

When a sub-agent sends a message to another session, the tool result now explains that the message went out under the session's address rather than the agent's, and where any reply will land. It is on for everyone on this build, with no flag.

Details
  • Applies to both delivery paths: the inter-session bridge and the local socket path.
  • Two wordings: a one-way form used when the bridge only has a one-way route, or when the socket path finds no messaging socket of its own, and the default form.
  • The user-visible display string is the parenthetical variant.
Evidence

; sent under this session's address: any reply will be delivered to this session's main conversation, not to this agent

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.248 →

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