Extending Picard
There are two primary ways that the functionality of MusicBrainz Picard can be extended: plugins and scripts.
Plugins can be installed / uninstalled and enabled / disabled from the Options menu. Installed plugins are loaded during the startup of Picard, and are made available to the program.
Scripts are stored within the user settings, and are managed from the
menu.See also
Details: Plugins / Scripts / Processing Order