Framing’s done! A little sheetrock, and the naughty kid cage will be complete! I’d guess the roof might be sagging a bit, but what’s going to prevent the ceiling underneath these struts from doing the same?!
I guess the rest of the cap is down inside the chimney somewhere. Looks like repair was attempted at some point. But the whole cap should have been replaced instead of glued together like an old coffee mug.