What is habit cues?

Habit cues is a concept in personal epistemology: Without a clear trigger an agent never activates no matter how well designed.

Example: You design a perfect morning review protocol — what to check, how to prioritize, when to stop. But you never specify what starts it. So you open your laptop, see 14 unread emails, and the review never fires. The protocol was sound. The trigger was missing. Three weeks later you find your review template untouched. The system failed at the entry point, not the logic.

This concept is part of Phase 22 (Trigger Design) in the How to Think curriculum, which builds the epistemic infrastructure for trigger design.