# Develop a module using the CFN\-CLI<a name="modules-develop"></a>

Follow these basic steps to develop and register a module project\.

1. In the CFN\-CLI, use the `[init](https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-type-cli-init.html)` command to create a new project\. The `init` command creates a `fragments` folder containing a sample fragment file named `sample.json`\.

   Follow the prompts\. Specify that you want to create a **module\(m\)**, and enter the module name\.

   ```
   cfn init
   Initializing new project
   Do you want to develop a new resource(r) or a module(m)?.
   >> m
   What is the name of your module type?
   (<Organization>::<Service>::<Name>::MODULE)
   >> My::Sample::SampleBucket::MODULE
   ```

1. Include your template fragment in the project\.

   In the `fragments` folder in the project, you should find a file named `sample.json`\. This is the template fragment file\. Author your template fragment in this file and save\.

   You can rename this file as necessary\. The folder can only contain a single file\.

   For more information, see [Creating a module template fragment](https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/modules-structure.html#modules-template-fragment)\.

1. Use `[validate](https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-type-cli-validate.html)` to validate your project\. Fix any issues reported\.

   The `validate` command regenerates the module schema, based on the template fragment you included in the `fragments` folder\. The module schema is located in the root folder, and named `schema.json`\.

1. Use `[submit](https://docs.aws.amazon.com/cloudformation-cli/latest/userguide/resource-type-cli-submit.html)` to register the module with CloudFormation, in the specified region\. Registering a module makes it available for inclusion in CloudFormation templates\.
**Note**
When you register your module using `submit`, CloudFormation re\-generates your module schema based on the template fragment in your project\. You can't specify a schema file directly\. To specify a module schema file when registering a module, use `[RegisterType](https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_RegisterType.html)` in the CloudFormation API\.

For information on using modules in CloudFormation templates, see [Using modules](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/modules.html) in the *CloudFormation Users Guide*\.