What
When asking users questions with multiple options, Claude Code can now display a markdown preview pane to show code snippets, ASCII mockups, or diagrams alongside each option.
Usage: When an option in AskUserQuestion includes a markdown field, the UI switches to a side-by-side layout with options on the left and a preview panel on the right.
Details
- Previews are displayed in a monospace box when an option is focused
- Supports multi-line text with newlines for ASCII art, code, or diagrams
- Only supported for single-select questions (not multiSelect)
- Users can also add free-text notes on their selection via the
nkey
Evidence
AskUserQuestion option schema now includes markdown field (search for "Optional preview content shown in a monospace box")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.