What
The Artifact tool lets Claude read and update artifacts. When Claude reads an artifact's files, the result now includes the page's title when there is one.
For artifacts whose type is fixed, the result used to list the files that come with that type. It now only says: "The type's files are fixed and not listed here." Results from updating an artifact also add a blank line before that note.
Why
This changes what Claude sees when it reads or updates an artifact.
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It is not clear whether the Artifact tool is available to everyone or only when switched on.