I have made this same bot (parts of it) around three times by now in different languages, I felt like giving it a Go. For old versions check the old repo (Elixir and Rust).
It was made to support just one guild and DMs, though it would probably take just some tweaking to support multiple servers properly, haven't tested that yet.
Requires Lavalink, you might need to setup oauth for youtube. After setting up your bot, remember to enable applications.commands and the Message Content privilege. Run the bot once with the -register flag.
If in a DM channel you can just talk to the bot and it will respond using an OpenAI API compatible endpoint, I use llama.cpp for this. In a server you can just reply to any message from the bot and type your prompt, don't forget to not unmark the "Ping the user" option, or, you can send a new message mentioning the bot. For models I generally use llama-3.2-1b-instruct, for llama.cpp you will need a gguf file.
Plays music using Lavalink, play command supports search or direct links (http, youtube, etc.)
help, reset, joel, ttj, play, stop, pause, resume, skip, join, leave, queue, playing
help: Displays all available commandsreset: Resets the users chat history with the botjoel: Posts a random or specific joel if a parameter is providedttj: Posts Time to Joel (latency test)play: Plays a songstop: Stops the current songpause: Pauses the current songresume: Resumes the current songskip: Skips the current songjoin: Joins the voice channelleave: Leaves the voice channelqueue: Shows the queueplaying: Shows the current song