Hi there, sorry for the late reply to your question!
I'm not entirely sure what you're saying, but if I understand correctly, then generally I guess it's okay to talk about the hack in the team thread to some extent- however, it's not acceptable to use the Team thread as a makeshift Hack thread; so while you can use the team thread to give people assignments and so on, you shouldn't really post updates on the hack- it should have its own thread in Progressing Hacks or the Hacks Showcase for that.