What probably matters to youSection of the release
What
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.
Why
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.
Added sinceA small documentation edit on Fullscreen rendering touched a line naming hover after this was published.To keep wheel scrolling but turn off click, drag, and hover handling, set `CLAUDE_CODE_DISABLE_MOUSE_CLICKS=1` instead. `CLAUDE_CODE_DISABLE_MOUSE` takes precedence when both variables are set.fullscreensee the edit
Added sinceA small documentation edit on Local touched a line naming Client after this was published.- `provenance: ContentUnavailable or ClientAsserted or SyntheticMarker or null`api/compliance/apps/sessions/localsee the edit
Confirmed sinceAnthropic's documentation has since written up Client, on Extension Support Matrix.| [OAuth Client Credentials](/extensions/auth/oauth-client-credentials) | `io.modelcontextprotocol/oauth-client-credentials` | Machine-to-machine auth without interactive user login |extensions/client-matrixsee the edit
Confirmed sinceAnthropic'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 icondesktopsee the edit
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up hover, on Desktop application.
