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The Real AI Coding Skill Is Problem Decomposition, Not Prompt Engineering

Fazm Team··2 min read
ai-codingproblem-decompositionprompt-engineeringdeveloper-skillsproductivity

The Real AI Coding Skill Is Problem Decomposition, Not Prompt Engineering

The people who get the most out of AI coding tools are not better at prompting. They are better at decomposing problems into pieces an agent can handle.

Prompt Engineering Is a Red Herring

The internet is full of prompt templates, magic words, and formatting tricks. Add "think step by step." Use XML tags. Start with a system prompt that says "you are an expert." These help at the margins, but they are not what separates 2x developers from 10x developers using AI tools.

The real skill is looking at a complex feature and breaking it into tasks that each fit within a single agent context window, have clear inputs and outputs, can be verified independently, and do not require understanding the entire codebase.

What Good Decomposition Looks Like

Bad: "Build me a user authentication system with OAuth, email verification, rate limiting, and session management."

Good: "Write a function that validates an OAuth callback, extracts the user profile, and returns a typed user object. Here is the OAuth provider's response format and here is the user type definition."

The second prompt will produce working code almost every time. The first will produce something that looks complete but has subtle integration issues in every component.

Why This Mirrors Good Engineering

This is not a new skill. It is the same skill that makes developers effective at writing tickets, delegating to junior engineers, or designing APIs. You need to understand the problem well enough to define clean boundaries around each piece.

The irony is that the developers who benefit most from AI are the ones who could have written the code themselves. They understand the problem domain deeply enough to know when the AI's output is wrong and how to scope the task so it is usually right.

The Decomposition Workflow

Break the feature into functions. Define the interface for each function. Generate implementations one at a time. Test each piece before moving to the next. The AI handles the syntax. You handle the architecture.

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Fazm is an open source macOS AI agent. Open source on GitHub.

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