Prompt Engineering vs Loop Engineering vs Graph Engineering: What Changes at Each Layer

MarkTechPost · 1 month ago · 20 ● 2 sources

Three engineering disciplines—prompt, loop, and graph engineering—organize AI system control at different scales: prompts direct single model responses, loops automate an agent's repeated decision cycles, and graphs coordinate multiple agents in parallel. The progression emerged in practice starting with prompt engineering around 2023, loop engineering terminology in late 2025, and graph engineering roughly six weeks after that. As work moves up the stack, humans shift from executing tasks directly to reviewing outcomes, with each layer preserving the ones beneath it rather than replacing them.