Long coding sessions fail in two familiar ways: the two-hour rabbit hole that produces one abandoned refactor, and the shallow half-focus of a dozen context switches. A timer fixes both. Committing to one round means one branch, one bug, one feature slice — and the break at the end is where you step back and notice the simpler approach.
For most programming work the 50/10 preset fits better than the classic 25/5 — fifty minutes is enough to load a problem into your head and make real progress before the break resets your eyes and posture.
