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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.234

Schema now describes cloud sessions and cross-session notices

Under the hood
Useful2 Signal4
JSON Output

The JSON output description now covers what a cloud-hosted session reports at startup and server-composed notices from other sessions.

What

The machine-readable description of Claude Code's JSON output gained two blocks. One describes what a cloud-hosted session reports when it starts up; the other describes a notice composed by the server on behalf of another session.

Details
  • The cloud session block is optional and only appears on start-up frames from the cloud client. It carries the cloud session id, a URL to view it, whether a device is bound and why not with a one-line message, and a directory sync state of off, seeding, armed or stopped with a file mode of container_sync, device_tools or unspecified.
  • It also carries a client version, with instructions that a consumer seeing a higher one should warn and carry on rather than refuse.
  • The notice block describes delivery over the polling event channel with server-asserted origin stamps that are stripped on the way in and re-applied by whatever composes the notice, the same discipline used for synthetic messages.
Evidence

Server-asserted ingest-path marker, same strip-and-restamp discipline as isSynthetic.

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.

See this entry in the whole of v2.1.234 →