You'll notice
Artifact listings now warn that other users' titles and descriptions are data, not instructions
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.