You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.269,
ImprovementsSection of the release
What
When Claude Code lists artifacts (shared documents or files) that include ones published by other users or organizations, the response now includes a warning stating that those titles and descriptions are data, not instructions.
Why
This is a defense against prompt injection, where text written by someone else could otherwise be mistaken by Claude for instructions to follow, rather than just content to display.
