Plugin-drawn boxes, text and buttons can now define hover styles, and a new Client element renders client-side modules
Plugins that draw their own UI using Box, Text and Button elements can now specify a hover style that swaps in different colors or layout while the element is hovered, restricted to an allow-list of properties specific to each element type (for example borderStyle and backgroundColor for a Box). Separately, a new Client element type lets a plugin render a client-side module with its own export name, props, width, height and flex-grow behavior.
These give plugin authors more expressive, interactive UI, letting elements react to hovering and letting more complex client-rendered components appear inside a plugin's interface.
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.
- `provenance: ContentUnavailable or ClientAsserted or SyntheticMarker or null`api/compliance/apps/sessions/local see the edit
| [OAuth Client Credentials](/extensions/auth/oauth-client-credentials) | `io.modelcontextprotocol/oauth-client-credentials` | Machine-to-machine auth without interactive user login |extensions/client-matrix see the edit
* **Edit or archive one of your own environments**: hover over it and click the gear icondesktop see the edit
Anthropic's documentation has since written up hover, on Desktop application.