Shekhar, G. (2026). A Three-Layer Reference Architecture for Agentic Engineering Integrating Runtime Harnesses, Evidence-Driven Execution Loops, and Explicit Workflow Graphs for Production Reliability. American International Journal of Computer Science and Technology, 8(6), 1-15. https://doi.org/10.63282/3117-5481/AIJCST-V8I6P101