How much detail do you want? Plugins are loadable code-chunks that share a public API. One of the most intuitive ways of achieving that is to create modules that expose one or more functions/methods with predefined names and signatures.

There was a question about this a few days ago where I also gave a very simple example.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Plugin Functionality? by Joost
in thread Plugin Functionality? by Spidy

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