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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.223 ·

Peer message envelopes can carry a hop-chain attribute

Messages passed between peer sessions now record the path they took to get to you.

Under the hood Internal Changes
JSON All of v2.1.223
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
Peer MessagingArea: what it touches
Internal ChangesKind: in v2.1.223,
Internal ChangesSection of the release
What

Delivered peer message envelopes can now include the chain of hops a message travelled, making previously internal routing state visible in the envelope itself.

Details
  • The envelope builder gained a fourth argument and emits a hop-chain="…" attribute alongside the existing from, from-session and from-name attributes when a validated chain is present.
  • The sender pulls the chain from the last peer-origin user message.
  • The hop-chain admission limits "hop-runaway" and "hop-loop" already existed; this only surfaces the chain in the envelope.
Evidence

hop-chain="

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

See this entry in the whole of v2.1.223 →

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