Human Decision Infrastructure (HDI) by Dr. Amanulla Khan looks beneath decisions to the conditions that shape them. Rather than focusing on outcomes or tools, it examines why capable people decide differently under pressure and why organisations struggle with consistency and trust. The book argues that these patterns reveal a structural absence — not personal failure. Introducing the model Intent → Clarity → Consistency → Trust, HDI positions trust as a by-product of stable decision conditions. In an era where AI accelerates execution, decision stability must be engineered, not assumed.