I’m not sure what you are asking.
For a custom bot with your own name you’ll be best to write all the code yourself
And create/obtain your own ClientID from Twitch (for authetication purposes).
ClientID’s can be obtained from: Twitch Developers
Authentication is covered here: Getting Tokens: OAuth | Twitch Developers
Creating a bot/using chat is covered here: Chatbots & IRC | Twitch Developers
Libraries will exist, most likely, for your chosen programming language, it you want to go the library route