The jets new command generates a new project with the following directory structure:

├── app
│   ├── controllers
│   ├── helpers
│   ├── javascript
│   ├── jobs
│   ├── models
│   └── views
├── bin
├── config
├── db
├── public
└── spec

The table below states the purpose of each directory:

File / Directory Description
app/controllers Contains controller code that handles API Gateway web requests. For more info refer to controllers
app/functions Contains simple functions. For more info refer to functions.
app/helpers Contains helpers methods that can be used to assist view code.
app/javascript Contains javascript, CSS, and images files that webpacker compiles. Javascript lives in javascript/packs, CSS in javascript/src and images in javascript/images. Refer to webpacker for more info.
app/jobs Contains job definitions. This code usually executes on a scheduled basis asynchronously outside of the request-response cycle. For more info refer to the jobs docs
app/models Contains model definitions, usually classes that interact with a database via ActiveRecord or some other ORM.
app/shared Contains shared resources. Refer to Shared Resources.
app/views Contains view code, usually HTML pages and forms.
bin Contains helper executables.
config Contains configuration files for databases, routes, webpacker, etc. Application-wide configurations are set in config/application.rb.
config/environments Contains environment-specific application-wide configurations (development.rb, production.rb, etc).
db Contains database migrations. ActiveRecord migrations live under db/migrate and the Dynamodb migrations are in db/dynamodb.
public Contains static files meant to be served “as-is”.
spec Contains tests.