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 that include ones other people have shared with you, the result now starts with a warning line saying those titles are data, not instructions.
Why
A malicious or careless person could name a shared artifact something that looks like a command, a technique known as prompt injection. This warning helps prevent Claude from mistakenly treating a crafted artifact title as something it should act on.
