A hook. Specifically, action:post.setFields at the moment, but I'll need it for other hooks as well.

Is there a clean way to get the currently logged in user's uid from a plugin? A search didn't seem to turn up a consensus.

@Giggiux Not sure what you mean. If you move a topic from one category to another, it disappears from the first category. I was suggesting the capability to have the same topic listed under multiple categories.

Is it possible to set user reputation via the write API?

Alternatively, it is possible to bypass posting restrictions when posting via the write API?

That's a policy decision. I can see at least two practical solutions:

1. Copy only the original post, and let the topic have a life of its own.

2. Copy only a reference to the topic, so it's in effect a different view of the same topic, and replies to any views show up in all views.

Tags don't quite address the problem.

There doesn't seem to be a way/plugin to copy a topic to another category. There is a way to move a topic if it's miscategorized, but it would also be useful to clone a topic if it fits multiple categories.