org-mode in-buffer configuration
Stuff that looks like:
#+TODO: NEXT | DONE
There are lots of such configuration options, and packages can add their own. Here is a list of common ones in core org-mode
# TODO keywords #+TODO: TODO NEXT | DONE
https://orgmode.org/manual/In_002dbuffer-Settings.html (setq org-agenda-todo-ignore-scheduled ’future)