What
Claude no longer treats a thread as fair game once anyone opens it in the artifact view. A writer has to hand the thread over, either by replying on it with "Send to Claude" or by mentioning @claude in it. Resolving a thread now also tells you which threads were not sent to Claude and how to send one.
Details
- Applies wherever the artifact tool's comment support is available.
Evidence
Replies land only on threads a writer has activated for Claude (by replying on the thread with Send to Claude or mentioning @claude in it)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Names in the bundle@claude
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Confirmed since
Anthropic's documentation has since written up @claude, on All settings.
* **Type**: array of objects, each with `marketplace` and `plugin` strings. An entry can instead be a `"plugin@marketplace"` string such as `"telegram@claude-plugins-official"`, which Claude Code treats as the equivalent object. The string…settings-reference see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up @claude, on All settings.