What
An artifact is a page or document Claude publishes. Publishing an artifact now has an extra check. The check applies when a feature called live paths is on and a page is published with live set to true. Types and markdown are not affected. Claude Code can then reject a page that saves over itself, with the error code live_self_saving_page.
Why
This stops Claude from publishing pages that overwrite themselves while they are being kept in sync live.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear where the live paths feature is switched on or what its default is.