Use this project with composer create-project to start developing custom Teleport project to maintain your own custom Actions or Extract tpls.
php composer.phar create-project modxcms/teleport-project teleport-of-mine/
You can use composer update on the resulting project to stay up-to-date with the latest release of Teleport. You can also use bin/compile to create your own teleport.phar from your custom project. NOTE that all bin scripts from Teleport are copied to the local bin/ and that the files and folders from Teleport's tpl/ directory are symlinked in the local tpl/ directory.