I was put in charge of a non-trivial project that requires me and another medior/senior engineer, I don't think it matters but we are talking about embedded systems. I was explicitly defined as the lead of this project and thus have both authority and responsibility for it; however, I do not have the authority to have some sort of performance review of this person later. This person has shown in the past to not have particularly good skills when it comes to writing design docs or communicating ideas.
We are going through a - limited - number of design docs and exploratory work. So far, everything this person has produced is extremely limited in depth and comments about expanding, detailing, and improving the produced documents, or better, the exploratory work, have gone practically unheard or resulted in an extremely limited improvement. I feel like I have to force details/work/problem-solving out of this person and I'm afraid I'm getting some kind of reverse delegation or weaponized incompetency behavior.
The only strategy I have at the moment is to continuously request syncs/check-ups, to use this moments to "force" more information out of this person. I have the feeling that, if I would never contact this person, I would be completely ghosted. This is the first time I find myself in this position so I'd like to hear the opinion of somebody else about what I could or should do.