slack-pixiv-bot/slack-ruby-bot-0.4.4/examples/minimal/pongbot.rb

require 'slack-ruby-bot'

module PongBot
  class App < SlackRubyBot::App
  end

  class Ping < SlackRubyBot::Commands::Base
    def self.call(client, data, _match)
      client.message text: 'pong', channel: data.channel
    end
  end
end

PongBot::App.instance.run