Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
5Signal: worth watching, 1 to 5
SDKArea: what it touches
New FeaturesKind: in v2.1.239,
What probably matters to youSection of the release
What
Task notifications delivered over the SDK protocol accept a third kind, projects-relay, for deliveries composed by Anthropic servers for a Claude Code Projects coordinator session and addressed to a thread session. A delivery carrying the relay stamps is framed as a message from the coordinator session; one without them keeps the generic background-notification framing.
Details
Relay message ids must match the cmsg_ id format, and relay rows are validated against those ids.
No gate is visible in the schema.
Evidence
projects-relay
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
