You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.239,
ImprovementsSection of the release
What
The notice shown when you watch an artifact now says you will be notified if it is republished from anywhere, including someone saving from the artifact page, rather than only from another session. The guidance text also gained a way to resume replies, and separate text tells the model that comments sent to Claude reach the session while the artifact shows a particular status.
Evidence
You'll be notified if it is republished elsewhere (another session, or someone saving from the page).
Strings lifted out of the shipped bundle, so the claim above can be checked against them.