# ExMontyPlugin v0.1.0 - Table of Contents > What a Monty plugin tells a cluster, and the registry that carries the answer between nodes: a behaviour for experiments, learning modules and motor policies, and a `:pg`-backed lookup that knows a name on every node and forgets it when a node goes down. ## Pages - [ex_monty_plugin](readme.md) - [Changelog](changelog.md) ## Modules - [MontyPlugin](MontyPlugin.md): What a plugin tells a cluster about itself, and what a cluster may rely on. - [MontyPlugin.Application](MontyPlugin.Application.md): The one process this package needs: the `:pg` scope plugins register in. - [MontyPlugin.Registry](MontyPlugin.Registry.md): Which plugins a cluster offers, by name, on every node.