the-bastion/bin/plugin/admin/adminMaintenance.json

{
    "interactive": [
        "adminMaintenance" , { "ac" : ["--lock","--unlock"]},
        "adminMaintenance --lock" , { "ac" : ["--message","<enter>"]},
        "adminMaintenance --lock --message" , { "pr" : ["\"<MESSAGE>\""]},
        "adminMaintenance --lock --message .+" , { "pr" : ["<enter>"]},
        "adminMaintenance --unlock" , { "pr" : ["<enter>"]}
    ]
}