usage property
Optional multi-line usage/help text shown under the listing by :help.
Implementation
@override
String? get usage =>
' :ai <prompt> run the agent (mode: '
'${_mode.wireName})\n'
' :ai mode <standard|plan|auto> set the default mode\n'
' :ai lang <language|off> set the reply language\n'
' :ai --standard|--plan|--auto <prompt> one-shot mode override\n'
' :ai --lang <language> <prompt> one-shot language override\n'
' :ai status show provider, model, mode, language\n'
' :ai -h | --help show this help';