Why does agent drift fail?

The most common reason agent drift fails: Believing that awareness of drift is the same as preventing it. You read this lesson, nod, and think 'I should watch out for that.' Six weeks later, you are drifting again — because awareness without a monitoring mechanism is just another thought that decays. The fix is not vigilance. It is a scheduled comparison between specification and actual behavior, externalized where you cannot ignore it.

The fix: Pick one cognitive agent — a habit, routine, or decision protocol — that you have been running for at least 30 days. Write down its original specification: what triggers it, what steps it includes, what output it produces, and how long it takes. Then, honestly describe what you actually did the last three times it fired. Compare the two descriptions side by side. Measure the gap: steps skipped, duration shortened, output degraded. If the gap is more than 20%, you have active drift. Write one sentence naming the drift pattern you see.

The underlying principle is straightforward: Agents degrade over time unless actively maintained — monitoring catches drift before it becomes failure.