AI9 min readFebruary 28, 2026

Prompt Engineering Mastery: From Basics to Chain-of-Thought

The difference between a good and great AI product is almost always the prompts. Learn the techniques used by AI teams at top companies.

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Arjun Mehta

Full-stack developer obsessed with AI and developer tooling.

Prompting is a Skill

Writing prompts that reliably produce the right output is an engineering discipline.

The Anatomy of a Great Prompt

[ROLE] You are an expert TypeScript developer.
[CONTEXT] The user is refactoring a legacy Express codebase.
[TASK] Review the following function and suggest improvements.
[CONSTRAINTS] Keep changes minimal.
[FORMAT] Return a numbered list of suggestions, then the improved code.

Chain-of-Thought Prompting

typescript
const prompt = ` Solve this step by step: 1. What are the key constraints? 2. What approaches could work? 3. Which is best and why? 4. Show the solution. `;

Conclusion

Prompt engineering is part art, part science. Iterate, test, and measure.

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