Jia Huang is Lead AI Engineer at A*STAR Singapore, and a technical author who writes about how AI agents are engineered. He is the author of the Designing AI Agents, The Claude Code Operating Model, and RAG from First Principles. He proposed the dual-axis framework for agent design patterns, which classifies patterns by cognitive function and execution topology, and the Pattern Selection Card, a practical method for choosing patterns under real cost and latency constraints. His work focuses on the engineering that surrounds the model rather than the model itself: context, tools, execution environments, and governance. He writes in both Chinese and English.