You'll notice
Plugin UI Button elements can now carry a hover state through to press handling
What
The Button element type used in plugin user-interface code now conditionally passes along a hover property when handling a press, if one is set.
Why
This is internal plumbing for plugin UI buttons; it suggests buttons can now track and act on hover state, not just clicks, but the finding doesn't describe a specific visible effect.
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 hover, on Desktop application.
* **Edit or archive one of your own environments**: hover over it and click the gear icondesktop see the edit
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
The finding doesn't say what visible effect the hover prop has once it reaches press handling.
Anthropic's documentation agrees
Anthropic's documentation has since written up hover, on Desktop application.