The Oath, Not the Chore
You are not listing chores. You are choosing the one thing you keep on your hands.
One, not many: the whole power of the flex is that it is a few, chosen things - not a to-do list you keep failing at. "I hand-brew my morning coffee" is a signal. "I hand-brew coffee, hand-fold laundry, hand-write notes, hand-build shelves" is just a very tired person. The selection is the point; the commitment depth is what the game measures.
Commitment depth: the dial is not whether you do it, it is how committed. Let-the-machine is zero. Hand-sometimes is the warm middle - you do it on the days you remember. Hand-always is the strong signal, the one you would defend in a comment section. That third setting is the oath, and it is the setting most people land on exactly one task.
The tattoo line: the ending line - "I keep one small thing by hand" - is the share. It compresses the whole choice into one sentence that stands on its own, and it is the line people screenshot and quote back at each other.