What
The artifacts tool now supports an action: "open", which shows the user an existing artifact by its url without creating or publishing anything new. This is gated behind a schema flag, and the tool's prompt now includes a paragraph explaining how to use it: pass action: "open" along with the artifact's url.
Why
This gives Claude a way to surface an existing artifact to the user on its own, separate from the act of publishing or editing one.
Names in the bundleaction: "open"
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.
Added since
A small documentation edit on Fullscreen rendering touched a line naming open after this was published.
To adjust scroll speed interactively, run `/scroll-speed`. The dialog shows a ruler you can scroll while it is open so you can feel the change immediately. Press `←` and `→` to adjust the speed, `r` to reset to the auto-detected default, a…fullscreen see the edit
Confirmed since
Anthropic's documentation has since written up open, on Batches.
- `type: "tab_opened"`api/messages/batches 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 open, on Batches.