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With the embed method of the discussion controller there is a facility to add a discussion, except it doesn't extract the title.
I had to suppress this as my client was wondering what was up. A lot of the time the links aren't relevant to the forum.
this is to do with the embed comments.
the problem is no title for the discussion.
"Undefined foreign content" is confusing to some.
I would make sense to create the discussion automatically. There is an excellent wordpress json api.