Publishing an artifact won't overwrite files Claude can't read unless you ask

An artifact is a set of files Claude Code publishes for you. Some files may already be published at a path Claude is about to write to, and Claude may be unable to read them. In that case Claude Code now tells the model it must not replace or remove those files. Instead the model should:

• Tell you about the files it can't read.
• Publish again without those paths, or at other paths.
• Publish with force:true only if you explicitly ask.

The message also warns that force:true overwrites any newer edit to the other files the same publish writes or removes.