Under the hood
Useful2 Signal3
Republishing an artifact Claude just fetched can be told apart from publishing something new.
What's wrong with this entry?
Anonymous. No account, no email.
What
Reading back a stored artifact that begins with an HTML doctype now attaches a freshly minted token to the result, which the publish path receives as artifactRoundTripPublish, so publishing content Claude just fetched can be told apart from publishing new content.
Evidence
artifactRoundTripPublish
Strings lifted out of the shipped bundle, so the claim above can be checked against them.