Every January, millions of people build habit systems designed for a person who doesn't exist: someone with stable energy, an empty calendar, and a motivation supply that never dips. By February, the streak apps are deleted and the shame sets in. The problem was never discipline. It was engineering.

Real habit systems are designed around failure, the way bridges are designed around load. The question isn't 'how do I stay perfect?', it's 'what happens to this system on my worst week?' If the answer is 'total collapse,' you built a streak, not a habit.