This is a simple datapack/mod that removes Stardust Labs's projects' introduction message when creating a world. The intro message can appear on the latest versions of Terralith, Incendium, and Nullscape.
Modpack devs: just stick the mod in your modpack, and it will prevent Stardust Labs projects from sending any chat messages on first world load. This is especially useful for those who don't want a ton of chat spam on first load, or don't want users confusingly joining the wrong Discord server.
Important
If you're using the mod version of Terralith 2.6.0+, you don't need to use this mod! Instead, disable the intro message via Terralith's config menu.