AI explains code you didn't write

AI can summarize what a file does, line by line, in plain English — way faster than reading docs.

Some examples

• Paste a file and ask 'what does this do, in 5 bullets.'
• Ask 'where would I add a new feature that does X?'
• Ask for the dependencies between files.

Try it!

Open a public repo on GitHub. Pick one file. Ask AI to explain it. Then trace one function in your head.

Understanding "AI explains code you didn't write" in practice: AI can help you write, fix, and understand code faster than ever — even if you're just learning. Decoding a random GitHub repo is way faster with AI as your tour guide — and knowing how to apply this gives you a concrete advantage.

• Apply the concepts from AI explains code you didn't write directly
• Identify where this fits into your current workflow
• Measure the before/after difference when you apply this
• Iterate and refine — first attempts rarely nail it

1. 1Use AI to generate unit tests for an existing function
2. 2Ask AI to refactor a messy function and explain the changes
3. 3Have AI suggest a code review for a recent pull request