As mentioned previously, a plugin is merely a project with an structure similar to a Griffon application with the addition of a contained plugin descriptor. However when installed, the structure of a plugin differs slightly. For example, take a look at this plugin directory structure:+ griffon-app
+ controllers
+ models
+ views
…
+ lib
+ src
+ main
+ cli
+ doc
Essentially when a plugin is installed into a project, the contents of the zip file will go into a directory such as plugins/example-1.0/
. Plugin contents will not be copied into the main source tree. A plugin never interferes with a project's primary source tree.