Keeping It Current
A CV is a living document. The easiest habit is to add to it as things happen rather than trying to remember a year later.
A Good Rhythm
Add a few lines whenever you finish something noteworthy.
Do a longer pass every few months.
Update it immediately when you change roles.
Every Commit Rebuilds
Pushing a change is all it takes. Your score card is regenerated from the new version, and your matches update with it.