FWIW, it’s broken again. No bidirectional links. 
I do hope that eventually TheBrain gets its act together with an API. I finally gave up on UI scripting TheBrain. I get tired of broken code. However TheBrain does allow you to set a keyboard trigger for almost everything it does. Set something like “Copy Local Thought URL” to an out of the way keystroke and then automate away by simulating the keystroke.
(“Out of the way” keystrokes can be an issue. I don’t have a keypad, so use Keyboard Maestro to emulate any of the 255 possible combinations of modifiers and keypad keys to do things like this.)
But still no joy in Mudville as far as seamless use of Hook and TheBrain 12 Beta.