Exactly. What I suggest is not to rigorously document. I will be writing letters to my son daily about things. And this will incidentally form a record of what he has been doing/learning, and how do we predict his personality is shaping up.
I predict that this will benefit you more, through reflection and conscious living, than your son (through a historical record later in life), but it will consequently greatly benefit him, because you are more tuned in to his development and can pick up on patterns and developments better. Good luck!
