Command groups and context menus

Slash command groups

Construct a SlashCommandGroup directly and register it on the bot:

local SlashCommandGroup = require("discord.lua/lib/interactions/slash_command_group")

local math = SlashCommandGroup.new("math", "Math operations")

math:command("add", "Add two numbers", function(ctx)
    ctx:respond("Use options in your command definition")
end)

bot:register_slash_command_group(math)

Direct subcommands can have their own option array and checks. group:create_subgroup(name, description, options) creates one nested subgroup level; Discord does not support deeper slash-command group nesting.

Context menus

User and message context-menu commands use the same application-command sync path:

bot:user_command({
    name = "Show ID",
    callback = function(ctx, user)
        ctx:respond("User ID: " .. user.id, { ephemeral = true })
    end,
})

bot:message_command({
    name = "Quote",
    callback = function(ctx, message)
        ctx:respond(message.content)
    end,
})

The second callback parameter is the resolved target supplied by the interaction: ctx.target_user for a user command and ctx.target_message for a message command. Both accept guild_ids and checks.

Command registrations sharing the same name, type, and global/guild scope are rejected by CommandTree:add.