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Questions about developing custom modules

A custom module is a local Magento module to add or extend features for a particular store. Every module must at least contain a module definition file in app/etc/modules and a configuration file in app/code/local/[NAMESPACE]/[MODULE]/etc/config.xml (Magento 1) or etc/module.xml and registration.php (Magento 2).

Details how to create a module in Magento 2 can be found in the Magento documentation.

For questions about developing extensions for the public, see . Extensions usually consist of one or more modules (see also: What is the difference between an extension and a module)