[bretthopper]

The autoloader is required in wp-config to get access to Dotenv: https://github.com/roots/bedrock/blob/master/wp-config.php#L...

But in the example you gave, ideally your custom plugin is itself a Composer package which requires Guzzle in its composer.json file. Then you'd require your plugin in the project's composer.json :)

Re: Capistrano. We're really trying to encourage people to fork this and modify it to their needs. So you could easily rip Cap out and integrate Fabric in your own fork. We're just providing some sensible defaults that we're familiar with.