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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 v2.1.239 ·

Relayed coordinator messages are labelled and escaped

Coordinator messages forwarded to worker agents are labelled and escaped so they can't fake markup.

You'll notice Improvements
JSON All of v2.1.239
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
AgentsArea: what it touches
ImprovementsKind: in v2.1.239,
What probably matters to youSection of the release
What

When a coordinator session forwards a message to a worker agent, the message is now wrapped in a preamble that says whether the text is a copied user message or the coordinator speaking, and the body is escaped so a message cannot fake relay markup.

Details
  • Only well-formed relay, cited and note tag lines survive unescaped; a line carrying a duplicate attribute is disqualified and escaped.
  • Unicode characters that normalize to angle brackets are escaped too, closing the look-alike route.
  • Recognised attributes on those lines are id|author|name|session|at|where|thread|edited_at|truncated|attachments.
  • A serverEnvelope option signals that the server handles the wrapping instead.
Evidence

id|author|name|session|at|where|thread|edited_at|truncated|attachments

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

See this entry in the whole of v2.1.239 →

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