Alright, I appear to have created a perfect storm for my rebuilders to screw up.
Planet was assaulted, repeatedly, until I'm at literally 0 energy from reconstructions elsewhere. Now, I've got turrets and the like on this planet. The rebuilders are ignoring the dead command center and keep trying to rebuild other stuff.
Recommendations? I'm sending a new colony ship over and scraping the old command center, but it would be nice if the rebuilders would prioritize the CCs.
Edit 2: And Energy Collectors.