Seneca is a toolkit for writing microservices and organizing the business logic of your app. You can break down your app into "stuff that happens", rather than focusing on data models or managing dependencies.Use this module to define commands that work by taking in some JSON, and, optionally, returning some JSON. The command to run is selected by pattern-matching on the the input JSON. There are built-in and optional sets of commands that help you build Minimum Viable Products: data storage, user management, distributed logic, caching, logging, etc. And you can define your own product by breaking it into a set of commands - "stuff that happens". That's pretty much it.