Outdated TYPO3 Version
This documentation refers to an outdated TYPO3 version - either select a supported version or make sure to use a TYPO3 Extended Long Term Support (ELTS) version to continue getting security updates.
The Extension Builder helps you build and manage your Extbase-based TYPO3 CMS extensions. To install this extension open the terminal and go to the directory :file:typo3conf/ext/` and enter:
git clone https://github.com/FriendsOfTYPO3/extension_builder.git
Then you can use the Extension Manager to install the Extension Builder.