Understanding Unfamiliar Code with AI

The old way vs. the new way

You used to work through a new project file by file. With an AI agent, you can instead ask: "Give me an overview of this codebase" – and get in seconds a structure that would otherwise have taken hours.

Let it explore

An agent can read files, spot patterns, and describe relationships without you looking at every line yourself. Start broad: "How is the project structured?", "What are the key data models?", "How is authentication handled?" – then get more specific.

Architecture summary

A good first step is an architecture summary: what the main components are, how they interact, which patterns get used. That gives you a map before you get lost in details.

Ask targeted questions

You can ask exactly the way you'd ask an experienced colleague: "What does this function on line 134 do?", "Why does this call foo() instead of bar()?", "What edge cases does this code handle?" These questions don't need special phrasing – just ask directly.

Diagrams help

For complex flows, ask for a diagram or a text sketch of the flow, for example how a request travels from the frontend to the database. That makes invisible connections visible.