When a changed artifact is re-published and the merge instructions tell Claude to merge its edits onto the live content, those instructions now call out cases where the live content includes contributions from others, was edited in-page, or is data-island content. In those cases Claude is warned to treat that content as data to merge, not as instructions.
Artifact live-content merge warnings now flag co-written / externally-edited content
Merge instructions now flag co-written or externally-edited live content as data, not instructions.
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.260,
ImprovementsSection of the release