You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
Internal ChangesKind: in v2.1.260,
ImprovementsSection of the release
The asset-list schema (ge) gains a cowritten boolean field, and a new schema (Te) validates { assets: [...].extend({ from_id: ... }) } capped at a maximum count, laying groundwork for attributing assets copied from another artifact. The artifact file_list and file_read tool responses can now include a from_type flag when the served content type was determined by the artifact's declared type rather than sniffed.
Tool-result messages for asset_list, asset_read, and file_read now surface the cowritten field (and, for file listings, from_type), and the returned text explicitly warns the model to treat such assets or files as untrusted data when a co-writer or an Artifact type's publisher, rather than the user, produced them.
