Use it now
The diff dialog now explicitly distinguishes a fullscreen mode from the sidebar view.
The diff view now decides between the sidebar diff UI and the full DiffDialog based on an explicit presentation === "fullscreen" flag, rather than inferring it from other state. The /diff command's immediate-availability check and description text were updated to match this new fullscreen distinction, and the contextual notification hinting at enabling tmux mouse support is now shown only when presentation mode is fullscreen.
Names in the bundle/diff
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 /diff, on Claude Code changelog.
* Improved the prompt footer: an editor or `/diff` selection now shows inside the prompt input, and fullscreen mode shows Remote Control status in the header instead of the footerchangelog see the edit
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up /diff, on Claude Code changelog.
Anthropic's release notes agree
Added a diff panel that opens beside the conversation in fullscreen mode and shows your uncommitted changes as Claude edits; toggle it with…