Two years ago, my interaction with AI was mostly limited to asking ChatGPT questions and checking its knowledge cutoff.

Today, I use multiple coding agents, connect company knowledge systems through MCP, run local models inside iOS applications, and maintain a project memory layer so different agents can continue each other’s work.

I am not an AI researcher.

I am an ordinary engineer who kept experimenting until AI gradually became part of both my development workflow and my daily life.

This is not a history of the AI industry. It is a personal engineering retrospective: what changed, what did not, and what I learned while moving from chat-based assistance to agent-driven development.