Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
JSON OutputArea: what it touches
Internal ChangesKind: in v2.1.234,
What probably matters to youSection of the release
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.
