PulseException is available on Packagist (using semantic versioning), and installation via Composer is the recommended way to install PulseException. Just add this line to your composer.json file:

"pulseframework/pulse-exception": "~1.0"

or run

composer require pulseframework/pulse-exception

Note that the vendor folder and the vendor/autoload.php script are generated by Composer; they are not part of PulseException

You need to define: _MODE_DEV_, _ROOT_DIR_