Tags would be (for a first version, see issue #17 for more):
Disable: dispable an entry, i.e. do not launch it
Break: Launch nothing when arriving on this item (very close to the preceding, merge? (with question?)
Run n: Run nth command after the current one
Internal: To run internal command (i.e. oclaunch )
That could be implemented with an object list for entries, itered to know if we launch or not. The format would be Sexp, to reduce Yojson dependency and limit the size of the binary.