You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.321,
ImprovementsSection of the release
What
Writes to the artifact database can now fail with a store_read_only error. The message says the document is read-only, including documents that are page-only. When the write was part of a batch, the message says the batch is all-or-nothing and nothing was written.
Why
Claude gets a clear reason when an artifact write is refused, rather than a vague failure. This only happens when the server returns that error.