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I used borksy for that kind of stuff.
You can use ITEMS as exits with it.
Just need to enable permanent items, and exit by dialogue.
so in my case, i designed the door as a tile that is a blank item
in the dialogue of that item i got the exit code as described in borksy, and in addition to that change my vars like:
{leftTheHouse = leftTheHouse + 1}

The real beauty of this hack comes when you want to have a conditional exits.