As the name suggests, anvil prompt uses the native anvil interface to prompt the player.
Prompt Argument
-a (space after is required)
Break lines
Yes, {br} signifies a break-line and CommandPrompter will put every line (except the first one, since it's the title/item display name) and make them as the item's lore.
Color Support
Yes
Configurable
Example
The example below shows the command with a prompt and a corresponding image of its appearance