Goodbye, Cruel World!
No, I’m not leaving, and no, I’m not quitting. I just finished writing the second scripted plug-in tutorial, “Goodbye, Cruel World!”, which introduces the activator extension. Plug-ins can take advantage of this extension to initialize and clean up after themselves. It also shows a simple example of scripting UI:

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You forgot to mention that you also added org.eclipse.core.runtime to MANIFEST.MF!
Well, it’s in there, but only barely and very easy to miss (the Wiring It In section). I just bolded it to make it stand out a bit more. Sorry about that!
Thnx, but my mistake. I’ll read more careful next time :)