When AI Writes Faster Than You Can Understand

Posted on Oct 9 • Originally published at prakhar.hashnode.dev

AI coding agents have changed the speed of software development dramatically.

A task that once took a team weeks can sometimes be implemented in hours. An AI agent can explore a repository, understand existing patterns, write code, run tests, and open a pull request—all while a human is still trying to understand the first few files.

The bottleneck is no longer writing code. It is understanding what is being built.

Many engineering teams are adopting AI coding tools with an obvious goal: move faster.

But there is an uncomfortable side effect.

The amount of code an engineer is expected to review can grow much faster than their ability to understand it.

This becomes particularly difficult during migrations or when adopting unfamiliar frameworks. You may be learning a new architecture, reviewing AI-generated code, understanding other people's changes, and still being expected to deliver faster than before.

Trying to solve this by simply reading more code doesn't scale.

A traditional workflow looks something like:

Ticket → Developer understands problem → Developer designs solution → Developer writes code → Review

Ticket → Agent explores repository → Agent designs solution → Agent writes code → Pull request

The human has effectively been removed from some of the most important reasoning steps.

Ticket → AI investigation → Architecture proposal → Human understanding → AI implementation → Human review

Before asking an agent to write code, ask it to explain:

Where does this functionality currently live?

What components, services, APIs, or data flows are involved?

What existing patterns should be followed?

The goal is to make sure the engineer understands the change before the code starts multiplying.

You don't need to understand every line of AI-generated code.

You need to understand the system well enough to answer five questions:

If you can answer those questions, you can review a large change without manually reconstructing every line of code.

Your value isn't necessarily in typing every line anymore.

It is increasingly in understanding the problem, making good technical decisions, and validating what the AI produces.

AI coding agents are also powerful learning tools.

When you encounter unfamiliar code, don't just ask:

"Teach me this implementation. Assume I understand the old architecture, but I'm new to this framework. Map the concepts to things I already know."

"What are three ways this implementation could be wrong?"

This turns the AI from a code generator into a senior engineer sitting next to you.

If AI only writes your code, your dependency on it increases.

If AI writes code and helps you understand the system, your engineering capability increases alongside it.

When adopting a new framework, it is tempting to start from the beginning and learn everything.

That is rarely practical during a fast-moving project.

Instead, identify the small set of concepts that explain most of the code you actually encounter.

For a new UI framework, that might mean focusing first on:

Then learn how your organization's architecture uses those concepts.

You don't need to become an expert in the framework before contributing.

You need enough understanding to build the right mental model.

When everything is changing at once, don't rely on memory.

Maintain a simple system map of your application:

Application │ ├── Platform │ ├── UI │ ├── Components │ ├── State │ └── Routing │ ├── Backend │ ├── APIs │ └── Services │ ├── Data │ └── Testing Enter fullscreen mode Exit fullscreen mode For each major area, capture four things:

What is it? Why do we use it? How does data flow through it? Where does the code live?

Let AI help maintain this documentation as the system evolves.

Over time, this becomes your mental map of the application—and makes every subsequent AI-generated change easier to understand.

You should eventually be able to look at a ticket and think:

Then look at the proposed implementation and think:

"I understand why the agent chose this approach."

And finally look at the pull request and think:

But you understand enough to predict the behavior of the system.

That is a much more scalable skill in an AI-assisted engineering environment.

The biggest mistake would be to respond to faster AI development by simply trying to work faster yourself.

You can't compete with an AI agent at generating code.

Instead, move yourself further upstream:

Understand the problem → shape the architecture → let AI implement → validate the result → learn from the implementation.

The engineers who thrive in this environment won't necessarily be the ones who write the most code.

They'll be the ones who can understand systems, make good decisions, and keep humans in control while AI operates at machine speed.

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