With auto action get article id from trigger onContentAfterSave

I would like to automatically unpublish articles after a registered user has edited his own article. I am trying to use Auto Action with code - but I need the article ID from the trigger - is that possibel to retrieve  ?

That's possible. What Joomla event are you trying to use? You should be able to use Joomla content events and have access to all the data it provides, which includes the full article object. Joomla content event documentation is as follows.

docs.joomla.org/Plugin/Events/Content

So for example onContentAfterSave would work. Condition against the context to be sure it's an article (believe this should be com_content.article) and against isNew to make sure it's an edit and not newly created. It would then run whatever code you've supplied in your code action.

I am trying to use onContentAfterSave, but I do not know what variables to use to get eg the article object in the code field ?

See the above documentation. The variables are listed there. CB Auto Action provides them in order as var1, var2, var3, etc.. The variables for onContentAfterSave are as follows.

var1 = context
var2 = article
var3 = isNew

So do I understand you correct: To get the articleId of the article that triggered the event i use this in the code field in the auto action ?

$articleId = [var2]->id;

You can't access substitutions like objects. They're always array keys. So you'd use [var2_id] to access the article id.