I have some code like the following in my application:
message = \"Hi, @John Doe!\" postID = fb.stream.publish( message = loader.render_to_string(\'wall_
Mention it's partially available by open graph now. You can use only when posting an open graph ACTION
Check: https://developers.facebook.com/docs/opengraph/mention_tagging/
It seems still impossible to use @mention tagging in classic feed posting via API