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Learn from your own code

No fake tutorials. Your real code is the textbook — so understanding comes naturally.

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Code quality, design principles, security... Experience professional engineering concepts through your own code.

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15 courses, 188 lessons. Master one concept in 15-20 minutes through interactive AI conversations.

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AI finds learning opportunities in your actual code

CodeSensei — Code Quality Lv.1 — Naming Things

Concept: Clear naming

Variable and function names are your code's documentation. Instead of vague names like tmp or data, choose names that instantly convey what the variable represents.

Found in your code:

function calc(a, b, c, d) {
  const x = a * b;
  const y = c + d;
  return x - y;
}

This function uses names like calc, a, b, c, d, x, y. Rewriting it as calcShippingCost(weight, distance, fuelRate, tollFee) makes the purpose clear just by reading the code.

I see — the argument names alone can tell the whole story

Frequently asked questions

Is it free to use?

Yes. Account creation is free and includes access to all basic learning features.

Is my code safe?

Code is only sent temporarily during AI analysis and is never stored in our database. Anthropic does not use commercial API customer data for model training.

What programming languages are supported?

TypeScript, JavaScript, Python, Go, Rust, Java, and all major programming languages are supported.

Can I use it without a GitHub account?

Yes. You can paste code manually to learn. Connecting GitHub makes the experience more seamless.

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