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Writing4 articles

Notes from
production.

What I have learned building production AI systems and full-stack products. Written plainly, without filler.

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Engineering Perspective10 min readJun 2026

The Four Stages of AI: LLMs, Agents, Multi-Agents, and the Harness

A field note on how AI assistance for engineers actually evolves in practice: from a model that can only talk, to agents that act, to teams of agents, to the harness around all of it, and why that last layer is where the real senior engineering work has moved.

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MZ

Principal Full Stack Engineer & Generative AI Engineer.
Crafting scalable, intelligent web systems.

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