Understand and fix a small piece of code

Step by step

1. 1Never paste passwords, API keys or private customer data.
2. 2Describe what the code should do and the exact error or behaviour you see.
3. 3Ask for an explanation of the code before asking for changes.
4. 4Apply one small change at a time.
5. 5Run the code and its tests yourself, and read every changed line.

Template to copy

Here is some [language] code:
[code]
It should [expected behaviour], but instead [actual behaviour or error message].
First explain what the code does, step by step.
Then suggest the smallest change that could fix it, and explain why.
Tell me how I can test the fix.

Asking AI to flag uncertainty does not make its answer correct. Keep checking the parts that matter.

Check the result

• You understand what the change does.
• The code runs and the tests pass on your machine.
• No secrets were shared with the tool.
• The change did not break other parts of the code.
• You read every line that changed.

Tools you could try

Listed by name, not ranked. You can only compare tools of the same type side by side.