Placebo is a library mod for Minecraft Java Edition, designed to provide functionality for other mods. It is intended for use by mod developers who need a foundation for their own mods. This type of mod is typically used to simplify the development process and provide a common set of functions that can be shared across multiple mods.
Placebo can be loaded using Forge or NeoForge, and is a library-api type mod, indicating it is used by other mods to access its functionality. It is used on the client and server side, and requires dependencies to function properly, although the specific dependencies are not specified.